HomeMy WebLinkAboutCT 02-23; Villages of La Costa the Greens Pt 1; Villages of La Costa the Greens Pt 1; 1999-03-01MJIUITAMTS
ON
SUPPLEMENTAL SOIL AND
GEOLOGIC INVESTIGATION
VILLAGES OF LA COSTA -
THE GREENS
CARLSBAD, CALIFORNIA
PREPARED FOR
MORROW DEVELOPMENT INCORPORATED
'lo VILLAGES OF LA COSTA
CARLSBAD, CALIFORNIA
MARCH 1999
GEOCON
INCORPORATED
GEOTECHNICAL CONSULTANTS
Project No. 06403-12-01
March 24, 2000
Morrow Development Incorporated
c/o Villages of La Costa
Post Office Box 9000-685
Carlsbad, California 92018-9000
Attention: Mr. Fred Arbuckle
Subject VILLAGES OF LA COSTA - THE GREENS
CARLSBAD, CALIFORNLV
SUPPLEMENTAL SOIL AND GEOLOGIC INVESTIGATION
Gentlemen:
In accordance with your authorization (Contract Number 7244.09-028) and our proposal No. LG-
99484 dated October 28, 1999, we have performed a supplemental geotechnical investigation of the
subject site. This work complements previous soil and geologic investigations which have been
conducted on the property during the period of 1988 to date. The purpose of this report is to compile
all relevant previously generated data along with the results of the current study into a single
document presenting our conclusions and recommendations pertaining to the geotechnical aspects of
developing the site as proposed.
Significant geotechnical issues associated with the project include slope stabihty, remedial grading of
unsuitable soils, settlement of the alluvial soils left in place and rock rippability. However, it is our
opinion that the site may be developed as proposed, provided the recommendations of this report are
followed.
Should you have any questions regarding this report, or if we may be of further service, please
contact the undersigned at your convenience.
Very truly yours,
^ONINCORPO
Lea|ie
RCE 22527
AS:DFL:lek
(6/del) Addressee
6960 Flanders Drive • San Diego, California 92121-2974 • Telephone (858) 558-6900 • Fax (858) 558-6159
TABLE OF CONTENTS
1. PURPOSE AND SCOPE 1
2. SITE AND PROJECT DESCRIPTION 2
3. SOIL AND GEOLOGIC CONDITIONS 3
3.1 Santiago Peak Volcanics (Jsp) 3
3.2 Santiago Formation (Ts) 3
3.3 Lindavista Formation (Qln) 4
3.4 Terrace Deposits (Qt) : 4
3.5 Landslide Debris (Qls) 4
m 3.6 Alluvium (Qal) 5
3.7 CoUuvium (Qc) 5
* 3.8 Topsoil (not mapped) 5
^ : 3.9 Undocumented Fill (Qudf) 5
3.10 Compacted Fill (Qcf) 6
4. GROUNDWATER..... 6
^, 5. GEOLOGIC HAZARDS 7
5.1 Faulting and Seismicity 7
* 5.2 Liquefaction 7
• 6. GEOTECHNICAL LAND USE CHARACTERISTICS 8
- 6.1 General 8
6.2 Slope Stability 8
6.2.1 Stability Considerations 8
m 6.2.2 Stability Analysis 9
6.3 Alluvium Settlement Considerations ; 11
^! 6.4 Rippability of Hard Rock 12
7. CONCLUSIONS AND RECOMMENDATIONS 13
7.1 General 13
7.2 Groundwater 14
7.3 Soil Excavation Characteristics : 14
7.4 Grading 14
7.5 Subdrains 16
^ 7.6 Settlement 17
7.7 Settlement Monitoring 17
7.8 Bulking and Shrinkage Factors 18
- 7.9 Slope Stability 19
7.10 Foundation Recommendations 19
7.U Retaining Walls and Lateral Loads 23
« 7.12 Slope Maintenance 24
7.13 Drainage « 25
" 7.14 Grading Plan Review 25
LIMITATIONS AND UNIFORMITY OF CONDITIONS
TABLE OF CONTENTS (Continued)
m
MAPS AND ILLUSTRATIONS
^ Figure 1, Vicinity Map
Figure 2, Geologic Map (Map Pocket)
•m Figures 3-5, Geologic Cross Sections (Map Pocket)
Figure 6, Typical Subdrain Detail
Figure 7, Typical Buttress Detail
Figure 8, Typical Stability Fill Detail
Figure 9, Slope Stability Analysis-Cut
^ Figure 10, Slope Stability Analysis-Fill
^ Figure 11, Surficial Slope Stability Analysis
« APPENDIX A
FIELD INVESTIGATION
* Figures A-1 through A-38, Logs of Large-Diameter Borings
« Figures A-39 through A-55, Logs of Small-Diameter Borings
Figures A-58 through A-168, Logs of Trenches
Figures A-169 through A-185, Logs of Air Track Borings
APPENDIX B
LABORATORY TESTING
^ Table B-I, Summary of Laboratory Maximum Dry Density and Optimum Moisture
Content Test Results
« Table B-II, Summary of Laboratory Direct Shear Test Results
Table B-HI, Summary of Laboratory Expansion Index Test Results
m
APPENDDC C
BORING AND TRENCH LOGS AND CONE PENETROMETER TESTS FROM
PREVIOUS INVESTIGATIONS
APPENDIX D
SELECTED BORING LOGS FROM RANCHO CARRILLO - MAJOR ROAD STUDY
APPENDIX E
^ SLOPE STABILITY ANALYSES
Figure E-1, Geologic Cross Section (Map Pocket)
" Figures E-2 through E-6, Slope Stability Analyses
APPENDIX F
RECOMMENDED GRADING SPECIFICATIONS
SUPPLEMENTAL SOIL AND GEOLOGIC INVESTIGATION
1. PURPOSE AND SCOPE
This report presents the findings of a supplemental soil and geologic investigation for The Greens of
The Villages of La Costa in Carlsbad, California (see Vicinity Map, Figure 1). The purpose of this
study was to present the data resulting from a recent surface and subsurface investigation along with
the geotechnical information from previous investigations of the project. This report is intended to
present recommendations relative to geotechnical aspects .of the site development including remedial
grading, slope stability, settlement, estimated rock rippability, bulking and shrinkage factors,
subsurface drainage and recommended grading specifications. It should be noted that the site was
previously known as La Costa Northwest.
The scope of the investigation included a review of the following:
1. Preliminary Soil and Geologic Investigation For La Costa - Northwest Area, Carlsbad,
California^ prepared by Geocon Incorporated, dated November 11, 1988 (Project
NO.D.4230-H01).
2. Preliminary Rippability Study, La Costa Northwest, Carlsbad, California, prepared by
Geocon Incorporated, dated September 25,1996 (Project No. 04230-12-03).
3. Middle Eocene Paralic Fades, Northern San Diego County, California, by L. I. Eisenberg
and P. K. Abbott, Eocene Geologic History San Diego Region, SEPM-GSA Fieldtrip
Guidebook, 1991.
4. Geologic Maps of the Northern part of San Diego County, California, DMG open file report
96-02.
5. Geotechnical Investigation for Rancho Carrillo Project - Major Roads, Carlsbad,
California, prepared by Geocon Incorporated, dated January 15, 1993 (Project No. 04787-
12-01).
6. Preliminary Geotechnical Investigation. Bressi Ranch, Carlsbad, California, prepared by
Lighten & Associates, dated July 29,1997.
7. Final Report of Testing and Observation Services During Grading and Construction of Site
Improvements, Poinsettia Sewage Lift Station. Rancho Carrillo, Carlsbad, California,
prepared by Geocon Incorporated, dated November 3,1998 (Project No. 05845-12-13).
8. Final Report of Testing and Observation Services During Construction of Site Improvements.
Rancho Carrillo. Offsite Sewer Main and Associated Access Road. Carlsbad, California,
prepared by Geocon Incorporated, dated April 22, 1999 (Project No. 05845-12-12).
9. Unpublished reports, aerial photographs and maps on file with our firm.
Project No. 06403-12-01 - 1 - March 24, 2000
The scope of the current 'field investigation consisted of a site geologic reconnaissance and the
drilling of 11 small-diameter borings, 19 large-diameter borings and 113 exploratory trenches. In
addition, 17 hydraulic air-track borings were excavated within the hard rock area located in the
southeastern comer of the project. Laboratory tests were performed on selected soil samples obtained
at various depths in the exploratory excavations to evaluate pertinent physical properties. Details of
the field exploration and laboratory testing programs are presented in Appendix A and B,
respectively. Logs of exploratory excavations from previous studies along with laboratory test results
and CPT (cone penetrometer test) soundings are presented in Appendix C. Selected logs of
exploratory excavation from Rancho Carrillo Major Roads, project are presented in Appendix D.
The recommendations presented herein are based on analysis of data obtained from our recent and
previous exploratory excavations, laboratory tests and our experience with similar soil and geologic
conditions. The base map used for this study consists of a conceptual grading plan, 1 inch equals 200
feet (1" = 200*) scale, entitled La Costa Greens, Conceptual Lotting Study, prepared by T & B
Planning Consultants, Inc., dated October 29, 1999. The results of the field investigation are
compiled on the Geologic Map, Figure 2.
2. SITE AND PROJECT DESCRIPTION
The subject project encompasses approximately 750 acres of property situated northeast of the
intersection of Alga Road and El Camino Real in the City of Carlsbad, California (see Vicinity Map,
Figure 1). Existing residential development borders the middle western, southeastern and southern
portions, with commercial and agricultural developments along the southwestern and northern
portions, respectively.
With the exception of a golf course and two residential structures in the south-central portions, the
majority of the property is undeveloped. Several easements for buried pipelines, embankments
associated with roads and ponds, and bordering streets contain undocumented fill soils (see Geologic
Map, Figure 2).
Topographically, the site is dominated by a major north-south draining alluvial valley fed by three
large tributaries in the north portion of the property. The majority of the site is characterized by
moderately sloping hillside terrain dissected by a dendritic pattern of drainages which have a central
confluence draining southward into San Marcos Creek. Elevations vary from a high of approximately
400 feet Mean Sea Level QASL) along the southeast boundary to a low of approximately 60 feet MSL
within the main drainage basin towards southern property boundary.
Project No. 06403-12-01 - 2 - March 24,2000
It is our understanding that'project development will consist of grading the site to form terraced and
sheet-graded building pads that eventually will receive 800 residential units along with associated
infi^tructure.
A review of the referenced La Costa Greens, Conceptual Lotting Study plan indicates maximum
proposed cut and fill slopes with heights on the order of approximately 100 and 40 feet, respectively,
with a maximum slope inclination of 2:1 (horizontal to vertical).
3. SOIL AND GEOLOGIC CONDITIONS
Six surficial soil types and three geologic formations were encountered during the investigation. The
surficial soils consist of compacted fill, imdocumented fill, topsoil, coUuvium, alluvium and landslide
debris. The formational units include Quatemary-aged Terrace Deposits, Tertiary-aged Santiago
Formation, and Jurassic-aged Santiago Peak Volcanics. Each of the soil types and geologic units
encountered are described below and their approximate mapped extent is depicted on Figure 2,
Geologic Map (map pocket).
3.1 Santiago Peak Volcanics (Jsp)
Fractured and weathered metavolcanic rocks of the Jurassic-aged Santiago Peak Volcanics are
exposed along the upper portions of slopes in the southeastern comer of the site. These rocks
typically display a highly variable depth of decomposition. Where completely decomposed, these
rocks excavate similar to blocky, hard, silty clay. Based on review of previous investigations (see
referenced reports), and our preliminary borings and refraction seismic study, it is estimated that this
unit will generally be rippable to depths on the order of 5 to 15 feet. In general, hard rock areas will
require preblast considerations and special handling during grading as presented in the concluding
section of this report.
3.2 Santiago Formation (Ts)
The Eocene-aged Santiago Formation, consisting of dense, massive, white to light green, silty fine to
coarse sandstones and hard, greenish-gray to brown claystones and siltstones underlie the surficial
soils throughout the entire project site.
A review of data from the exploratory borings indicates that weak, fractured clay layers, "bedding
plane shears", and inactive fault features are present within the Santiago Formation. These features
will adversely impact the stability of the proposed major cut slopes within the development and
require remediation. The Santiago Formation generally possesses suitable geotechnical characteristics
in either an undisturbed and/or properly compacted condition. Excavations in the more sandy portions
may provide a sufficient quantity of "very low" to "low" expansive capping materials. However, the
Project No. 06403-12-01 - 3 - March 24, 2000
claystone and siltstone portions of the Santiago Formation are moderately to highly expansive.
Consideration should be given to restricting the placement of these materials within 4 feet of finish
grade. Where selective grading is not practical and these expansive soils are placed at grade, special
design will be necessary for foundations and concrete flatwork, and roadway pavement sections will
be greater due to typically lower resistance R-Values of these soils.
It should be noted that in previous reports these materials were classified as The Delmar Formation
and the Torrey Sandstone. Recent pubHcations including Reference No. 3 classify these materials
with the Eocene-aged sediments of northern San DiegO; County as the Santiago Formation. This
should be taken into consideration in the review of logs of borings and trenches from our previous
studies, presented in Appendices C and D.
3.3 Lindavista Formation (Qln)
Quaternary-aged Lindavista Formation comprised of light reddish-brown to orange gravelly silty
sandstones were encountered as a cap of several feet thick on top of the Santiago Formation along the
northwest margins of the site. These materials, possesing "very low" to "low" expansive
characteristics, should provide good foundation-bearing characteristics in either an undisturbed
and/or properly compacted condition.
3.4 Terrace Deposits (Qt)
Stream-deposited terrace deposits were encountered to overlie the Santiago Formation, mostly within
the lower portions of the major drainages. These sediments consist of moderately dense, yellowish to
reddish brown clayey sand and silty sand with some clay. In general, these materials, except for the
upper 2 to 3 feet are considered suitable to receive fill. The upper 2 to'3 feet are usually weathered
and more porous and, therefore, will require remediation prior to receiving any fill.
3.5 Landslide Debrts (Qls)
One deep-seated landslide and several smaller surficial landslides were mapped within the site. The
larger landslide is located in the east central portion of the property. Boring No. LB-8 indicates a
thickness of approximately 25 feet. The smaller landslides are generally shallower in depth. The
landslide debris generally consists of relatively compressible, clayey sand and sandy clay. Remedial
grading to remove the landslide debris will be necessary. One of the suficial landslides is located
along the northern property boundary and encroaches off-site. In the event the property boundary
limits total removal, the proposed cut slope will be stabilized by construction of a buttress fill.
Preferably, permission to grade off-site should be obtained to allow total removal with regrading
considering future planned grading on the adjacent property.
Project No. 06403-12-01 -4- March 24, 2000
3.6 Alluvium (Qal)
The alluvium encountered onsite generally consists of dark brown sandy clays to clayey sands. The
alluvium in the major drainages has a water table at a minimum encountered depth of 8 to 10 feet
below the surface. The maximum thickness of alluvium occurred in CPT-4 which encoimtered
approximately 60 feet of relatively easily penetrable sediments near the confluence of tributary
drainages. The bottom part of the sediments may consist of weathered Santiago Formation or more
granular materials, the extent of which is not known. The results of the field investigation and
analysis of the laboratory test data indicate that the alluvial soib underlying the site can be classified
as moderately to highly compressible. Development within areas containing alluvium will require
remedial grading in the form of removal and recompaction to mitigate potential settlement problems.
The anticipated depths of alluvium removal and recompaction are shown on Figure 2. These vary
firom a range of 7 to 10 feet in the lower central valley area to a range of 8 to 28 feet in the higher
surrounding side valleys. Remedial work will be limited by the depth of the groundwater within
different areas. The settlement potential and stability of the embankments placed over alluvial soils
left in place present geotechnical considerations to future site development and will require
mitigation as discussed below.
3.7 CoUuvium (Qc)
Colluvial soils occur along the canyon side-slopes, low areas, the base of natural slopes, and along
the head scarps of landslides. These deposits are often indistinguishable from alluvium and thick
topsoil deposits, therefore, only the thicker, or potentially thicker areas have been mapped separately
on Figure 2. The maximum observed thickness of these materials is on the order of U feet as exposed
in Trench No. T-14, located in the central eastern portion of the site. In general, these deposits consist
of poorly consoHdated sandy clays to clayey sands and are potentially compressible. Development
within areas imderlain by colluvium will require remedial grading as recoiimiended in the concluding
sections of this report.
3.8 Topsoil (not mapped)
Topsoil blankets the majority of the site to an average depth of approximately 2 feet. The topsoil is
typically composed of dark brown silty sands to sandy clays. The potential for both expansion and
consolidation indicate that the topsoil should be removed and recompacted as discussed in the
Conclusions and Recommendations section of this report.
3.9 Undocumented Fill (Qudf)
At least two generations of fill are present on the site. The earlier fills consist of pond embankments
or dams installed pre-1953 which are of unknown compaction and depth. The approximate areal
Project No. 06403-12-01 - 5 - March 24, 2000
extents are shown on Figure 2. No trenches were performed in the embankment fills, but observation
of the exposed surficial soils indicates that the earthem structures are composed of silt and clay
derived from onsite materials.
Later generations of fill are associated with the burial of pipelines and utilities, construction of roads
and adjoining subdivisions, or fill disposal areas in canyon areas along the southern margins of the
property. These materials are considered unsuitable in their present conditions and should be removed
and recompacted in areas of planned improvements.
3.10 Compacted Fill (Qcf)
Compacted fills have been placed within the project site during recent construction of the sewer
pump station located within the north central portion of the project along with associated sewer
relocation and the access road. The sewer line traverses the property from east to west and was
constructed as a part of the development of the Rancho Carrillo project to the east. The grading for
the pump station, sewer trench backfill and construction of the access road was performed under
testing and observation services of Geocon Incorporated and reported in References 7 and 8.
4. GROUNDWATER
Groundwater seepage was observed in the form of a spring within the canyon located at the southeast
comer of the site. Numerous water seeps were encountered in the exploratory excataions along the
northern and eastern boundary (see Boring Nos. LB-1, LB-8, LB-13, LB-17 and LB-19 of the current
study, and Boring Nos. B-4, B-11, and B-13 through B-17 of our pervious investigation,
Appendix C). These seeps were found to occur within the Santiago Formation or within the landslide
debris and the Santiago Formation-Santiago Peak Volcanics contact. The depth of water seepage
varies. Irrigation from developments on the property margins, as well as perched water draining off a
relatively shallow westward sloping volcanic bedrock surface may be responsible sources. Grading
plans should consider the groundwater conditions to assure drainage features, e.g., canyon subdrains,
drained stability/buttress fills, etc., are incorporated into the final design as appropriate.
Due to the nature of the Santiago Formation, which consists of interbedded sandstone and
claystone/siltstone, seepage may occur along the proposed cut slopes with these materials. In
. addition, a more permanent groundwater table is present within the alluvial valley and tributary
canyons. At the north-central confluence of drainages, the water table was approximately 8 to 10 feet
below the siuface (during pur previous investigation). The relationship between alluvial removals and
the position of groundwater table will be discussed in the Conclusions and Recommendations section
of this report.
Project No. 06403-12-01 - 6 - March 24, 2000
5. GEOLOGIC HAZARDS
5.1 Faulting and Seismicity
It is our opinion, based on the site reconnaissance, evidence obtained in the exploratory excavations
and a review of published geologic maps and reports, that the site is not located on any known active
fault trace. A few minor inactive faults were encountered within the Santiago Formation, These faults
are generally in a north-south orientation. The nearest known active faults are the Rose Canyon Fault
and the Newport-Inglewood (offshore) located approximately 7 and 10 miles, respectively, to the
west and Elsinore Fault Zone which lies approximately 23 miles to the northeast.
Maximum Credible and Maximum Probable Seismic events of Magnitude 6.9 and Magnitude 5.7,
respectively, are postulated for the Rose Cayone Fault. The estimated Maximum Credible and
Maximum Probable Peak site acceleration are 0.30g and 0.15g, respectively. Seismic parameters for
the other regional faults capable of generating ground acceleration at the site are summarized on
Table 5.1
TABLE 5.1
DETERMINISTIC SITE PARAMETERS FOR SELECTED FAULTS*
Fault Name
Distance
From Site
(miles)
Maximum Credible Event Maximum Probable Event
Fault Name
Distance
From Site
(miles)
Maximum
Credible
(Mag.)
Peak Site
Acceleration
(g)
Maximum
Probable
(Mag.)
Peak Site
Acceleration
(g)
Rose Canyon 7 6.90 0.30 5.70 0.15
Newport-Inglewood-Offshore 10 6.90 0.23 5.80 0.11
Coronado Bank 22 7.40 0.16 6.30 0.08
Elsinore-Julian 23 7.10 0.13 6.40 0.08
Elsittore-Temeciila 23 6.80 0.11 6.30 0.07
Palos Verdes 41 7.10 0.07 6.20 0.03
San Jacinto-Anza 46 7.20 0.06 6.90 0.05
•EQFault Computer Program, Blake 1997.
It is our opinion that the site could be subjected to moderate to severe ground shaking in the event of
a major earthquake along any of the above-mentioned faults, however, the seismic risk at the site is
not considered to be significantiy different than that of the surrounding developments of similar
geologic settings in the Carlsbad area.
5.2 Liquefaction
The potential for liquefaction during a strong earthquake is limited to cohesionless soils which are in
a relatively loose, unconsolidated condition and located below the groundwater level. Due to the
Project No. 06403-12-01 -7-March 24,2000
dense nature of the formational units, the removal and recompaction of the surficial soils and fine-
grained nature of the alluvial soils, the potential for seismically included soil liquefaction occurring at
the site is considered to be low.
6. GEOTECHNICAL LAND USE CHARACTERISTICS
6.1 General
Based on findings of this study, there are three primary geotechnical considerations impacting the
construction of the site as planned. The first design consideration is the potential for cut slope
instabihty caused by the presence of weak clay seams or bedding plane shears (BPS). The second
consideration is the settiement characteristics of the alluvial deposits that caimot be efficientiy
removed and recompacted due to the presence of shallow groundwater within the drainage courses.
The third consideration is the rippability characteristics of the volcanic rocks within the southeast
portion of the project. A discussion of each primary geotechnical consideration relative to proposed
development is presented below.
6.2 Slope Stability
6.2.1 Stability Considerations
The results of the field investigation for the project indicate the presence of numerous adverse
geologic conditions in some of the proposed major cut slopes. The adverse geologic conditions
encountered include remolded bedding plane shears (BPS), weak clay strata, groundwater seepage,
inactive faulting and landslide debris. Remedial grading procedures, such as construction of drained
buttress fill or stability fill should be anticipated for cut slope excavations exposing these potentially
unsuitable geologic consitions.
Slope stability analyses for these slopes have been performed utilizing the parameters shown in
Table 6.2. The results are presented in Appendix D. A brief discussion of the proposed cut slopes that
are anticipated to be impacted by adverse conditions along with mitigation recommendations is
presented below. It should be noted that where the geologic adverse conditions are Umited to the
surficial stability of the slopes, construction of a stability fill is recommended. For cut slopes in
homogeneous materials and fill slopes, a different method of stability analyses has been utilized as
discussed in the Conclusions and Recommendations section of this report.
Project No. 06403-12-01 - 8 - March 24, 2000
6.2.2 Stability Analysis
6.2.2.1 General
Computer analyses of slope stability were performed utilizing the SLOPEW program based on
simplified Janbu Method of Slices or Simplified Bishop Method. The complexity of the site geology,
the results of the subsurface investigation, laboratory testing and existing and future topography were
considered in perfomung the stability analyses. The analyses are smrmiarized in Appendix E.
The geometry of proposed cut slopes were developed by extrapolating the conditions encountered in
the exploratory excavations. The computer-generated cross sections included herein presents the
simplified section configuration which were used in the analyses. The cross sections presented in
Figure E-1, Appendix E, are the original geologic sections from which the computer-generated
sections were generated.
6.2.2.2 Design Parameter Selection
Drained shear tests were performed on relatively undisturbed samples of the prevaiUng lithologic
units. Additional shear tests were performed on a remolded sample of formational soils to evaluate
strength parameters suitable for the fill soil to be used to stabilize the slopes. The results of the shear
tests are presented in Table B-I of Appendix B. The following table presents the soil strength
parameters that were utilized in the analyses. These values are derived from the laboratory test results
and experience with similar soil and geologic conditions. A discussion of the specific cut slopes
requiring remediation by buttressing is assessed below. Locations by assigned number are shown on
Figure 2.
TABLE 6.2.2.2
SOIL STRENGTH PARAMETERS
m
m Soil Type. Angle of Internal Friction
(ji (degrees)
Cohesion
c(psf)
m Santiago Formatioa 30 500
Weak Clay Beds 20 200
m Compacted Fill (buttress) 25 300
Bedding Plane Shears (BPS) 10 100
m
m
6.2.2.3 Cut Slope No. 1
m
m
This cut slope is located along the northem boundary. The conceptual grading plan indicates that the
maximum height of this slope will be approximately 45 feet. Figure E-1 presents a geologic cross
Project No. 06403-12-01 -9-March 24, 2000
section of the slope (K-K'). A bedding plane shear was encountered in Boring No. B-15 at the
approximate elevation of 277 feet MSL. Slope stability analyses indicate that a buttress fill with a
minimum key width of 40 feet will be required to provide a factor of safety in excess of 1.5.
6.2.2.4 Cut Slope No. 2
This slope is also located along the northem property boundary. During the site investigation, a
bedding plane shear (BPS) was encountered at the approximate elevation of 261 feet MSL (see Cross
Section LL' on Figure E-1). In addition, the eastern portion of this slope will be cut into an existing
landslide. This slope has a maximum height of 40 feet. Slope stability analyses indicates a buttress fill
with a 40-foot wide shear key will be required.
6.2.2.5 Cut Slope No. 3
Cut slope No. 3 is located just southeast of cut slope No. 2. This slope has a maximum height of
approximately 37. A soft saturated clay seam was encountered in Boring No. LB-14 at the
approximate elevation of 177 feet (MSL). This clay seam would daylight (if continuous) at the toe of
the proposed cut slope. Geologic Cross Section M-M* Figure E-1 depicts the anticipated geologic
condition. A buttress fill with a minimum width of 40 feet has been designed for this slope.
6.2.2.6 Cut Slope No. 4
The proposed approximately 100 feet high cut slope is located within the east-central postion of the
site. The subsurface exploration indicates a presence of an inactive fault that may impact the gross
stability of tins slope (see Cross Section GG', NN", and Boring No. B-1). The slope stability analyses
indicates that based on the information available, this cut slope should have an adequate factor of
safety against deep-seated failure. The lower portion of this cut slope, however, may require
construction of a stability fill due to the possibility of groundwater seepage near the toe of the slope.
6.2.2.7 Cut Slope No. 5
This cut slope is located along the south-facing slope within the southeast portion of the project,
adjacent to the SDG&E easement. Review of the log for Boring No. LB-7 indicates the presence of a
bedding plane shear at approximate elevation of 176 feet (MSL) (see Cross Section 00' on Figure
E-1). Stability analysis indicates a factor of safety of less tiian 1.5 for the proposed cut slope.
Therefore, a buttress fill with a minimum shear key width of 40 feet will be necessary to stabilize
this slope.
Project No. 06403-12-01 - 10 - March 24, 2000
6.3 Alluvium Settlement Considerations
Where total removal and recompaction of the alluvial soils is not practical due to the presence of
groundwater, alluvium will be left in place. Plaimed embankment fill placed within certain portions
of the main drainages will be affected by the compressibility of alluvial soils not removed.
The amount of settiement that could occur is a function of thickness and compressibility of the layers
within the alluvial deposits, and the magnitude of additional vertical loading resulting fixim placement
of fill and/or structures. The majority of the alluvium/colluvium will be removed within the two
drainage features where groundwater will not restrict grading. However, it is estimated that between
20 and 40 feet of saturated alluvial soils will be left in place mdemeath the proposed Poinsettia Lane
and the area just to the north. A review of the conceptual grading plan indicates that between
approximately 15 and 25 feet of fill will be placed on the area just north of the proposed Poinsettia
Lane within the northeast portion of the project site. The amount of estimated settlement, depending
upon the specific locations, ranges firom 2 to 8 inches. The majority of the settiement is anticipated to
occur during construction. The post-construction settlement dependant on the proposed fill height
will take anywhere firom 2 to 6 months for 90 percent consolidation (primary settlement).
The proposed embankment fill associated with the extension of Alicante Road, to be located just
northeast of the golf course, will be underlain by approximately 60 feet of alluvium. The proposed
additional fill for the embankment ranges firom 15 to 20 feet. The total settlement is estimated to be
approximately 10 to 12 inches with the given embankment loading. The time required for primary
settiement to occur is estimated at 6 to 8 months.
The removal and recompaction of the alluvial soils for the central portion of Poinsettia Lane will also
be limited due to the close proximity of the golf course. Groundwater should not be a constraint in
this area.
It is assumed that the existing sewer lines with the northeastern portion of the project will be
relocated to their permanent locations in Poinsettia Lane. This, of course, requires that the road
embankment for Poinsettia Lane be constructed and after the settiement-monitoring program is
satisfactorily implemented, the utility lines will be installed.
If the site development schedule caimot accommodate the time required to allow the primary
settlement to dissipate, the installation of wick drains prior to placement of the embankment fills
should be considered. The use of wick drains could reduce the settiement period of 6 to 8 months to 1
to 3 months.
ProjectNo. 06403-12-01 - 11 - March 24, 2000
A settiement monitoring program consisting of buried settlement plates and surface monuments
should be established for each settiement-sensitive area. A detail of settiement moilitoring program is
presented hereinafter.
6.4 Rippability of Hard Rocic
The Santiago Peak Volcanics (Jsp) are exposed along the upper slopes in the southeast portion of tiie
site. These rocks are at various stages of weathering, and will therefore excavate differently. A
rippibility study was performed to evaluate potential difficulty in excavations during grading in this
area.
Initially, ten seismic refiaction traverses were conducted in 1996. This was followed up by
excavating 17 air-track borings during the current phase of investigation. The results indicate a
variable but relatively shallow depth of rippable materials. It appears that the depth of rippable
materials increases at lower site elevations. It should be noted, however, that the actual extent of
rippability may exceed the interpreted depth where fi^cturing within the rock is present. It is our
experience that where the firacturing is extensive, grading may be possible, although more difficult
grading in this condition requires an extensive irrigation soaking to soften the fi^cture zones.
The approximate depth of rippable materials are shown next to the locations of the air-track borings
on Figure 2. The logs of the air-track borings are presented in Appendix A.
Project No. 06403-12-01 - 12 - March 24, 2000
7. CONCLUSIONS AND RECOIVIIVIENDATIONS
7.1 General
7.1.1 No soil or geologic conditions were encoimtered during this investigation performed by
Geocon, Incorporated or those previous studies referenced that would preclude the
development of the property as presentiy planned, provided the recommendations of this
report are followed.
7.1.2 The surficial soil units (undocumented fill, topsoil, colluvium, alluvium, and landslide
debris) are not considered suitable for support of fill or structural loads in their present
condition and will require remedial grading where not limited by the presence of
groundwater.
7.1.3 The settiement potential of the alluvial deposits left in place will require special
consideration during the planning and construction of site improvements. A surcharge
grading program, including settlement instrumentation and monitoring will be required for
those areas of planned improvements within the zone of influence of left-in-place
alluvial soils.
7.1.4 The stability of proposed cut slopes within the site possess a significant geotechnical
consideration to development Drained buttresses and stability fills will be required to
stabilize slopes underlain by potentially unstable geologic features.
7.1.5 Grading and installation of deeper utilities within the area underlain by rock (Santiago Peak
Volcanics) will be difficult, especially at the lower portion of plaimed cut. Blasting along
with special handling of the rock should be anticipated. Building pads and stteets should be
imdercut to allow capping with at least 3 feet of granular soils to facilitate installation of
surface improvements.
7.1.6 Remedial grading to stabilize adverse geologic conditions may require encroaching beyond
the property limits in certain areas, e.g.. Cut Slope No. 2 and possibly Cut Slope No. 1, to
effect total removals. Therefore, permission to grade off-site should be obtained.
Furthermore, the remedial grading should consider fiiture grading plaimed for the adjacent
property.
7.1.7 A suspected water well was encountered during our field investigation near CPT 4 at the
Central Confluence of drainage. All encoimtered wells should be properly abandoned per
the County of San Diego Health Department.
ProjectNo. 06403-12-01 - 13- March24, 2000
7.2 Groundwater'
7.2.1 The principal area of the project where groundwater will impact site development is the
areas witiiin the main canyon. Remedial grading of tiie compressible alluvial deposits will
be hmited to approximately 3 feet above the groundwater. Groundwater seepage were also
encountered in some of the exploratory excavations. It is recommended that periodic
observations be made by the soil engineer or engineer geologist during grading for
construction for the presence of groundwater. It is further recommended that after canyons
are cleaned of unsuitable soils, a subdrain be mstalled within die bottom of the removal
areas to reduce the potential for groundwater buildup within the canyon fills.
7.3 Soil Excavation Characteristics
7.3.1 Based on field observations and laboratory tests, the prevailing soils are anticipated to vary
fi-om "veiy low" expansive sandy soils to "medium" to "high" expansive silty clays.
7.3.2 Excavation of the on-site surficial and formational units should be possible with moderate
to heavy effort with conventional heavy-duty equipment. The alluvium and colluvial soils
may be wet to saturated and grading should anticipate the need to diy back or mix with
drier material prior to their use as compacted fill.
7.3.3 Excavation of the volcanic rocks would require heavy ripping and possible blasting. It is
estimated that the proposed grading will encounter rippable rock to depths on the order of 5
to 15 feet below existing ground surface. Surface blasting will be required where highly
resistant volcanic rocks are exposed. It is likely, however, that excavations greater than 15
feet within the major cut areas will encounter marginal to nonrippable rock conditions.
Oversize rocks should be placed in accordance with the Recommended Grading
Specifications presented in Appendix F.
7.4 Grading
7.4.1 All grading should be performed in accordance with the city of Carlsbad grading ordinance
and the Recommended Grading Specifications contained in Appendix F. Where the
recommendations of Appendix F conflict with this section of the report, the
recommendations of this section shall take precedence.
7.4.2 Prior to commencing grading a preconstruction conference should be held at tiie site with
the grading contractor, civil engineer and geotechnical engineer in attendance. Specified
soil handling and/or the grading plans can be discussed at that time.
ProjectNo. 06403-12-01 - 14 - March 24. 2000
7.4.3 Site preparation-should begin with the removal of all deleterious material and vegetation.
The depth of removal should be such that material exposed in cut areas or soils to be used
as fill is relatively fi-ee of organic matter. Material generated fi-om stripping and/or site
demolition should be exported from the site.
7.4.4 Rock generated from grading and/or blasting should be handled in accordance with the
procedures recommended in Appendix F.
7.4.5 All potentially compressible surficial soils (undocumented fill, topsoil, alluvium,
colluvium, and landslide debris) within areas of planned grading should be removed to firm
natural ground (except where limited by groundwater) and properly compacted prior to
placing additional fill and/or structural loads. The actual extent of removals shall be
determined in the field by the soil engineer and/or engineering geologist Overly wet,
surficial materials will require drying back and/or mixing with drier soils to facilitate
proper compaction.
7.4.6 If groundwater is encountered during remediation of the alluvium, as anticipated along the
lower elevation areas of the main drainage courses, removals should be terminated at about
3 feet above the water level. It is recommended that these areas be "pot-holed" and
observed by the project geologist to verify the groundwater elevation during grading.
7.4.7 During remedial grading temporary slopes should be inclined no steeper than
l:l(horizontal to vertical). Grading should be scheduled to backfill against these slopes as
soon as practical and no temporary slope should be left exposed longer than 2 days. More
stringent grading scheduling requirements may be imposed by the soils engineer when
performing removals adjacent to the property boundary.
7.4.8 The site should then be brought to final subgrade elevations with stmctural fill compacted
in layers, in general, soils present on site are suitable for re-use as fill if free from
vegetation, debris and other deleterious material. Layer of fill should be no thicker than
will allow for adequate bounding and compaction. Including backfill and scarified ground
surfaces, should be compacted to at least 90 percent of maximum dry density at
approximately 2 percent over optimum moisture content, as determined in accordance with
ASTM test procedure D 1557-91. Fill materials near and/or below optimum moisture
content will require additional moisture conditioning prior to placing additional fill.
7.4.9 Areas of planned improvements designated as underlain by or within the zone of influence
of left-in-place alluvium may be surcharged by placing additional fill to a depth of 5 feet
above proposed finished grade, including slopes. The surcharge shall remain in place until
ProjectNo. 06403-12-0i - 15 - March 24, 2000
the soils engineer recommends removal. The decision to surcharge should be made early in
the grading phase and based on the benefit to the overall development schedule.
7.4.10 To reduce the potential for differential settiement, it is recommended that the cut portion of
cut-fill building pads be undercut at least 4 feet and replaced with compacted 'Very low" to
"low'* expansive fill soils. The bottom of the undercut portion should be sloped at about 1
percent toward the fill portion to facilitate drainage of future subsurface water.
7.4.11 Where practical, the upper 4 feet of all building pads (cut and fill) should consist of "very
low" to "low" expansive soils. This will require undercutting cut pads where unsuitable
expansive soils are exposed at finish grade. The more highly expansive fill soils should be
placed in deeper fill areas. 'Very low" to 'low" expansive soils.
7.4.12 Building pads and streets underlain by hard rock (Santiago Peak Volcanics) should be
undercut at least 3 feet and compacted fill consisting of "very low" to "low" expansive soils
placed to achieve finish grade.
7.5 Subdrains
7.5.1 Subdrains should be installed in the canyons to be filled. A cross-section of the subdrain
configuration is presented on Figure 6. The lower 20 feet of the subdrain installation should
consist of nonperforated pipe with a concrete cutoff wall constructed immediately below
the junction of the perforated pipe with the nonperforated pipe. The cutoff wall should
extend at least 6 inches below the sides and bottom of the subdrain trench and 6 inches
above the top of the pipe.
7.5.2 In order to maintain a dramage gradient within the canyon subdrain system, it may be
necessary to extend the nonperforated outiet pipe beyond the limits of planned grading
operations. As an alternative design, a properly compacted fill may be placed within the
lower canyon bottom until the minimum drainage gradient is achieved. Two subdrains
would then be installed along the fill/natural ground contacts. Where the natural slope
gradient exceeds 5 percent, the perforated pipe may be deleted from the subdrain system
when recommended by the project soil engineer or geologist.
7.5.3 Heel drains installed in the buttresses and stability fills should be connected to the canyon
subdrain or storm drain system where possible and have cleanouts installed or where
possible.
ProjectNo. 06403-12-01 - 16 - March 24, 2000
7.5 A After installation of the subdrains and heel drains, the project civil engineer should survey
its location and prepare "as-built" plans of the subdrain location. The project civil engineer
should verify the proper outiet for the canyon subdrains and the contractor should ensure
that the drain system outlet is free of obstructions. The recommended locations of the
canyon subdrains will be finalized during a review of the final site grading and
improvement plans.
7.6 Settlement
7.6.1 As previously discussed, embankment fills placed over alluvium left in place due to
groundwater grading constraints will experience varying amounts of settiement as a
function of the thickness of the compressible soils remaining and the loading of the fill.
The majority of the settlement is expected to occur during the grading phase of
development, however, the time to achieve primary settlement may extend to as long as 8
months.
7.6.2 It is recommended that grading in these areas be planned to occur early in the project
grading period to reduce the potential for conflict with installation of improvements.
7.6.3 Other considerations include placement of a surcharge (5 feet) above the planned grade. In
addition, installation of a wick drain system would enable greatiy accelerating the time-rate
of settiement.
7.6.4 Settiement monitoring will be required as discussed below to evaluate when the fill has
stabilized and further improvements may proceed.
7.7 Settiement Monitoring
7.7.1 Where compressible alluvial soils are left in-place a settiement monitoring program will be
required as discussed below.
7.7.2 At designated locations within the bottom of the over-excavated areas, a 4-foot-square, '/i-
inch-thick steel plate should be placed at 2 feet below the bottom elevation and leveled
with a layer of gravel. After surveying the plate (Horizontal and Vertical), the plate should
be covered with 2 feet of gravel and at least 2 feet of fill soil placed before heavy
equipment is allowed to run over the plate location. The steel plate and gravel as well as
equipment for installation should be provided by the grading contractor.
Project No. 06403-12-01 - 17 - March 24. 2000
7.7.3 Subsequent to placement of the planned embankment fill, including the surcharge (if
recommended), Geocon, Incorporated will drill and "tag" the steel plate. The civil engineer
will then survey the plate to determine settlement which occurred during grading. At that
time a surface settlement monument will be installed to monitor settiement movement
thereafter.
7.7.4 Surveying of the surface monument should be performed by the project civil engineer on a
weekly basis with the results provided to Geocon, Incorporated. Settiement due to primary
consolidation will be considered to have ceased when survey readings show essentially no
movement over 4 consecutive weekly readings. At that time, Geocon Incorporated will
prepare a report, recommending surcharge removal, for submittal to and approval by the
City of Carlsbad.
7.8 Bulking and Shrinlcage Factors
7.8.1 Estimates of embankment bulking and shrinkage factors are based on comparing laboratory
compaction tests with the density of the material in its natural state as encountered in the
exploratory excavations. It should be emphasized that variations in natural soil density, as
well as in compacted fill density, render shrinkage value estimates very approximate. As an
example, the contractor can compact the fill soils to any relative compaction of 90 percent
or higher of the maximum laboratory density. Thus, the contractor has approximately a 10
percent range of control over the fill volume. Based on the limited work performed to date,
it is our opinion that the following shrinkage and bulking factors can be used as a basis for
estimating how much the on-site soils may shrink or swell (bulk) when excavated from
their natural state and placed as compacted fills.
TABLE 7.8
SHRINK/BULK FACTORS
SoU Unit Shrink/Bulk Factor
Fill and Topsoil 10-15 percent shrink
Alluvium and Colluvium 10-15 percent shrink
LandsUde Debris 5-10 percoit shrink
Terrace Deposits 2-7 percent shrink
Santiago Formation and Lindavista Formation 3-5 percent bulk
Santiago Peak Volcanics 20-30- percent bulk
Project No. 06403-12-01 - 18-March 24. 2000
7.9 Slope Stability
7.9.1 Due to the presence of adverse geologic features within the Santiago Formation, it is
recommended that certain cut slopes planned within the project be constructed as a drained
buttress fill to mitigate long term surficial slope stability. A typical detail showing
construction of a buttress fill is presented on Figure 7.
7.9.2 Construction of drained stability fill may also be required for cut slope No. 4 (see
Section 6.0). A typical detail showing construction of a drained stability fill is presented on
Figure 8.
7.9.3 The results of analyses for gross stability indicate that cut and fill (non-stabilized) slopes
have a factor of safety in excess of 1.5 for the maximum anticipated heights (see Figures 9
and 10). Surficial slope stability analysis of fill slopes also indicates a factor of safety in
excess of 1.5 (see Figure 11).
7.9.4 The results of slope stability analyses for cut slopes requiring buttress fills are presented m
Appendix E.
7.9.5 It is recommended that all cut slopes be observed during grading by an engineering
geologist to verify that the soil and geologic conditions do not differ significantiy from
those anticipated and to determine if adverse bedding, fractures or joints exist. Remedial
grading procedures can be recommended should adverse geologic conditions be observed.
7.9.6 The outer 15 feet of fill slopes, measured horizontal to the slope face, should be composed
of properly compacted "granular soil*' fill to reduce the potential for surficial sloughing.
7.9.7 All fill slopes should be overbuilt at least 3 feet horizontally, and cut to the design finish
grade. As an alternative, fill slopes may be compacted by back-rolling at vertical intervals
not to exceed 4 feet and then track-walking with a D-8 dozer, or equivalent, upon
completion such that the fill soils are uniformly compacted to at least 90 percent relative
compaction to the face of the finished slope.
7.9.8 All slopes should be planted, drained and properly maintained to reduce erosion.
7.10 Foundation Recommendations
7.10.1 The following foundation recommendations are for one-and/or two-story structures and are
based upon the assumption that the soil conditions within 4 feet of finish pad subgrade
ProjectNo. 06403-12-01 - 19 - March 24, 2000
consist of granular "low" expansive soil (Expansion Index less than 50). The
recommendations are separated into categories dependent upon the deptii and geometry of
fill underlying a particular building pad and/or lot. Final foundation design
recommendations for each building will be presented in the final compaction report after
the grading for the individual building pads has been completed.
7.10.2 Foundations for either Category I, II, or III may be designed for an allowable soil bearing
pressure of 2,000 pounds per square foot (psf) (dead plus live load). This bearing pressure
may be increased by one-third for transient loads such as wind or seismic forces.
TABLE 7.10.1
FOUNDATION RECOMMENDATIONS BY CATEGORY
Foundation
Category
Minimum
Footing Depth
(inches)
Continuous Footing
Reinforcement
Interior Slab
Reinforcement
m-I 12 One No. 4 bar top and bottom 6 X 6 - 10/10 welded wire
mesh at slab mid-point
m
m
n IS Two No. 4 bars top and bottom No. 3 bars at 24 inches on
center, both directions
m 24 Two No. 5 bars top and bottom No. 3 bars at 18 inches on
center, both directions
CATEGORY CRITERIA
Category I: Maximum fill thickness is less than 20 feet and Expansion Index is less than or
equal to 50.
Category II: Maximum fiU thickness is less than 50 feet and Expansion Index is less than or
equal to 90, or variation in fill thickness is between 10 feet and 20 feet
Category HI: FiU thickness exceeds 50 feet, or variation in fill thickness exceeds 20 feet, or E^ansion
Index exceeds 90, but is less than 130, or alluvitnn left in place.
Notes:
1. AU footings should have a minimum width of 12 inches.
2. Footing depth is measured &om lowest adjacent subgrade (including topsoil, if planned). These
depths apply to both exterior and interior footings..
3. All interior Uving area concrete slabs should be at least 4 inches thick for Categories I and n and 5
inches thick for Category HI. This ^lies to both building and garage slabs-on-grade.
4. All interior concrete slabs should be underlain by at least 4 inches (3 inches for Category EI) of
clean sand or crushed rock.
5. All slabs expected to receive moisture sensitive floor coverings or used to store moisture sensitive
materials should be underlain by a vapor barrier covered with at least 2 inches of the clean sand
recommended in No. 4 above.
ProjectNo. 06403-12-01 -20-March 24, 2000
7.10.3 The use of isolated footings which are located beyond the perimeter of the building and
support structural elements cotmected to the building is not recommended for Category HI.
Where this condition cannot be avoided, the isolated footings should be connected to the
building foundation system with grade beams.
7.10.4 For Foundation Category HI, the structural slab design should consider using interior
stiffening beams and connecting isolated footings and/or increasing the slab thickness. In
addition, consideration should be given to connecting patio slabs, which exceed 5 feet in
width, to the building foundation to reduce the potential for fiiture separation to occur.
7.10.5 No special subgrade preparation is deemed necessary prior to placing concrete, however,
the exposed foimdation and slab subgrade soils should be sprinkled, as necessary, to
maintain a moist soil condition as would be expected in any such concrete placement
However, where drying of subgrade soils has occurred, reconditioning of surficial soils will
be reqiured. This recommendation applies to foundations as well as exterior concrete
flatwork.
7.10.6 Where buildings or other improvements are plarmed near the top of a slope steeper than 3:1
(horizontal :vertical), special foundations and/or design considerations are recommended
due to the tendency for lateral soil movement to occur.
• For fill slopes less than 20 feet high, building and wall footings should be deepened
such that the bottom outside edge of the footing is at least 7 feet horizontally from
the face of the slope.
• Where the height of the fill slope exceeds 20 feet, the minimum horizontal distance
should be increased to H/3 (where H equals the vertical distance from the top of the
slope to the toe) but need not exceed 40 feet. For composite (fill over cut) slopes, H
equals the vertical distance from the top of the slope to the bottom of the fill
portion of the slope. An acceptable alternative to deepening the footings would be
the use of a post-tensioned slab and foundation system or increased footing and
slab reinforcement. Specific design parameters or recommendations for either of
these alternatives can be provided once the building location and fill slope
geometry have been determined.
• For cut slopes in dense formational materials, or fill slopes inclined at 3:1 (hori-
zontal: vertical) or flatter, the bottom outside edge of building and wall footings
should be at least 7 feet horizontally from the face of the slope, regardless of slope
height.
• Swimming pools located within 7 feet of the top of cut or fill slopes are not
recommended. Where such a condition cannot be avoided, it is recommended that
the portion of the swimming pool wall within 7 feet of the slope face be designed
assimiing that the adjacent soil provides no lateral support. This recommendation
applies to fill slopes up to 30 feet in height, and cut slopes regardless of height. For
ProjectNo. 06403-12-01 - 21 - March 24, 2000
swimming pools located near the top of fill slopes greater than 30 feet in height,
additional recommendations may be required and Geocon Incorporated should be
contacted for a review of specific site conditions.
• Although other improvements which are relatively rigid or brittie, such as concrete
flatwork or masonry walls may experience some distress if located near the top of a
slope, it is generdly not economical to mitigate this potential. It may be possible,
however, to incorporate design measures which would permit some lateral soil
movement without causing extensive distress. Geocon Incorporated should be
consulted for specific recommendations.
7.10.7 As an alternative to the foundation recommendatiorxs for each category, consideration
should be given to the use of post-tensioned concrete slab and foundation systems for the
support of the proposed structures. The post-tensioned systems should be designed by a
structural engineer experienced in post-tensioned slab design and design criteria of the
Post-Tensioning Institute (UBC Section 1816). Although this procedure was developed for
expansive soils, it is understood that it can also be used to reduce the potential for
foundation distress due to differential fill settiement. The post-tensioned design should
incorporate the geotechnical parameters presented on the following table entitled Post-
Tensioned Foundation System Design Parameters for the particular Foundation Category
designated.
TABLE 7.10.2
POST-TENSIONED FOUNDATION SYSTEM DESIGN PARAMETERS
Post-Tensioning Institute (FTI)
Design Parameters
Foundation Category Post-Tensioning Institute (FTI)
Design Parameters I n m
1. Thomthwaite Index -20 -20 -20
2. Clay Type - Montmorillonite Yes Yes Yes
3. Clay Portion (Maximum) 30% 50% 70%
4. Depth to Constant Soil Suction 7.0 ft. 7.0 ft. 7.0 a
5. Soil Suction 3.6 ft. 3.6 ft. 3.6 ft.
6. Moisture Velocity 0.7 in./mo. 0.7 inVmo. 0.7 mJmo.
7. Edge Lift Moisture Variation Distance 2.6 a 2.6 ft. 2.6 a
8. Edge Lift 0.41 in. 0.78 in. 1.15 in.
9. Center Lift Moisture Variation Distance 5.3 ft. 5.3 ft. 5.3 ft.
10. Center Lift 2.12 in. 3.21 m. 4.74 in.
7.10.8 UBC Section 1816 uses interior stiffener beams in its structural design procedures. If the
structural engineer proposes a post-tensioned foundation design method other than UBC
Section 1816, it is reconmiended that interior stiffener beams be used for Foundation
Categories II and HI. The depth of the perimeter foundation should be at least 12 inches for
Project No. 06403-12-01 -22-March 24, 2000
Foundation Category 1. Where the Expansion Index for a particular building pad exceeds
50 but is less than 91, the perimeter footing depth should be at least 18 inches; and where it
exceeds 90 but is less than 130, the perimeter footing depth should be at least 24 inches.
Geocon Incorporated should be consulted to provide additional design parameters as
required by the structural engineer.
7.10.9 The recommendations of this report are intended to reduce the potential for cracking of
slabs due to expansive soils (if present), differential settlement of deep fills or fills of
varying thicknesses. However, even with the incorporation of the recommendations
presented herein, foundations, stucco walls, and slabs-on-grade placed on such conditions
may still exhibit some cracking due to soil movement and/or shrinkage. The occurrence of
concrete shrinkage cracks is independent of the supporting soil characteristics. Their
occurrence may be reduced and/or controlled by limiting the slump of the concrete, proper
concrete placement and curing, and by the placement of crack control joints at periodic
intervals, in particular, where re-entry slab comers occur.
7.11 Retaining Walls and Lateral Loads
7.11.1 Retaiiung wails not restrained at the top and having a level backfill surface should be
designed for an active soil pressure equivalent to the pressure exerted by a fluid density
of 30 pounds per cubic foot (pcf). Where the backfill will be inclined at no steeper than 2.0
to 1.0, an active soil pressure of 40 pcf is recommended. These soil pressures assume that
the backfill materials within an area bounded by the wall and a 1:1 plane extending upward
firom the base of the wall possess an Expansion Index of less than 50. For those lots with
finish grade soils having an Expansion Index greater than 50 and/or where backfill
materials do not conform to the above criteria, Geocon Incorporated should be consulted
for additional recommendations.
7.11.2 Uru-estrained walls are those that are allowed to rotate more than O.OOIH at the top of the
wall. Where walls are restrained from movement at the top, an additional uniform pressure
of 7H psf (where H equals the height of the retaining wall portion of the wall in feet)
should be added to the above active soil pressure.
7.11.3 All retaining walls should be provided with a drainage system adequate to prevent the
buildup of hydrostatic forces and should be waterproofed as required by the project
architect. The use of drainage openings through the base of the wall (weep holes, etc.) is
not recommended where the seepage could be a nuisance or otherwise adversely impact the
property adjacent to the base of the wall. The above reconunendations assume a properly
compacted granular (Expansion Index less than 50) backfill material with no hydrostatic
Project No. 06403-12-01 - 23 - March 24, 2000
forces or imposed surcharge load. If conditions different than those described are
anticipated, or if specific drainage details are desired, Geocon Incorporated should be
contacted for additional reconunendations.
7.11.4 In general, wall foimdations having a minimimi depth and width of one foot may be
designed for an allowable soil bearing pressure of 2,000 psf, provided the soil within 3 feet
below the base of the wall has an Expansion Index of less than 90. The proximity of the
foundation to the top of a slope steeper than 3:1 could impact the allowable soil bearing
pressxjre. Therefore, Geocon Incorporated should be consulted where such a condition is
anticipated. The location of wall footings, however, should comply with the
recommendations presented in Section 7.10.6.
7.11.5 For resistance to lateral loads, an allowable passive earth pressure equivalent to a fluid
density of 300 pcf is reconmiended for footings or shear keys poured neat against properly
compacted granular fill soils or undisturbed natural sofls. The allowable passive pressure
assumes a horizontal surface extending at least 5 feet or three times the surface generating
the passive pressure, whichever is greater. The upper 12 inches of material not protected by
floor slabs or pavement should not be included in the design for lateral resistance. An
allowable fiiction coefficient of 0.4 may be used for resistance to sliding between soil and
concrete. This fiiction coefficient may be combined with the allowable passive earth
pressure when determining resistance to lateral loads.
7.11.6 The recommendations presented above are generally applicable to the design of rigid
concrete or masonry retaining walls having a maximum height of 8 feet. In the event tiiat
walls higher than 8 feet or other types of walls are plarmed, such as crib-type walls, Geocon
Incorporated should be consulted for additional recommendations.
7.12 Slope Maintenance
7.12.1 Slopes that are steeper than 3:1 (horizontal:vertical) may, under conditions which are both
difficult to prevent and predict, be susceptible to near surface (surficial) slope instability.
The instability is typically limited to the outer three feet of a portion of the slope and
usually does not directly impact the improvements on the pad areas above or below the
slope. The occurrence of surficial instability is more prevalent on fill slopes and is
generally preceded by a period of heavy rainfall, excessive irrigation, or the migration of
subsurface seepage. The disturbance and/or loosening of the surficial soils, as might result
from root growth, soil expansion, or excavation for irrigation lines and slope planting, may
also be a significant contributing factor to surficial instability. It is, therefore, recom-
mended that, to the maximum extent practical: (a) disturbed/loosened surficial soils be
Project No. 06403-12-01 - 24 - March 24, 2000
eitiier removed or properly recompacted, (b) irrigation systems be periodically inspected
and maintained to eliminate leaks and excessive irrigation, and (c) surface drains on and
adjacent to slopes be periodically maintained to preclude ponding or erosion. It should be
noted that although the incorporation of the above recommendations should reduce the
potential for surficial slope instability, it will not eliminate the possibility, and, therefore, it
may be necessary to rebuild or repair a portion of the project's slopes in the fiiture.
7.13 Drainage
7.13.1 Establishing proper drainage is imperative to reduce the potential for differential soil
movement, erosion and subsurface seepage. Positive measiffes should be taken to properly
finish grade the building pads after structures and other improvements are in place, so that
drainage water firom the building pads and adjacent properties is directed to streets away
from foundations and tops of slopes. Experience has shown that even with these provisions,
a shallow groundwater or subsiaface condition can and may develop in areas where no
such condition existed prior to site development. This is particularly true where a
substantial increase in surface water infiltration results from an increase in landscape
irrigation.
7.14 Grading Plan Review
7.14.1 The geotechnical engineer and engineering geologist should review the grading plans prior
to finalization to verify their compHance with the recommendations of this report and
determine the necessity for additional comments, recommendations and/or analysis.
m
Project No. 06403-12-01 - 25 - March 24, 2000
LIMITATIONS AND UNIFORMITY OF CONDITIONS
1. The recommendations of this report pertain only to the site investigated and are based upon
the assumption that the soil conditions do not deviate from those disclosed in the
investigation. If any variations or undesirable conditions are encountered during construction,
or if the proposed construction will differ from that anticipated herein, Geocon Incorporated
should be notified so that supplemental recommendations can be given. The evaluation or
identification of the potential presence of hazardous or corrosive materials was not part of the
scope of services provided by Geocon Incorporated.
2. This report is issued with the understanding that it is the responsibility of the owner, or of his
representative, to ensure that the information and recommendations contained herein are
brought to the attention of the architect and engineer for the project and incorporated into the
plans, and the necessary steps are taken to see that the contractor and subcontractors carry out
such recommendations in the field.
3. The findings of this report are valid as of the present date. However, changes in the
conditions of a property can occur with the passage of time, whether they be due to natural
processes or the works of man on this or adjacent properties. In addition, changes in
applicable or appropriate standards may occur, whether they result from legislation or the
broadening of knowledge. Accordingly, die findings of this report may be invalidated wholly
or partially by changes outside our control. Therefore, this report is subject to review and
should not be relied upon after a period of three years.
Project No. 06403-12-01 March 24, 2000
SOURCE: 2000 THOMAS BROTHERS MAP
SAN DIEGO COUNTY. CALIFORNIA
REPROOUCEO WITH PERMISSION GRANTED BY TH0UA3 BROTHERS MAPS. THIS MAP IS COPYRKSHTEO BY THOMAS BROS. MAPS. IT 15 UNIj»WFUL TO COPY OH flSPROOUCE ALL OR ANY PART THEBEOI'. WWHETHER FOR PERSONAL USE OR RESALE. WITHOUT PERMISSION
NO SCALE
GEOCON O
INCORPORATED ^fSF
GEOTECHNICAL CONSULTANTS
6960 FLANDERS DRIVE - SAN DIEGO, CALIFORNIA 92I2I-2974
PHONE 858 558-6900 - FAX 858 558-6159
VICINITY MAP GEOCON O
INCORPORATED ^fSF
GEOTECHNICAL CONSULTANTS
6960 FLANDERS DRIVE - SAN DIEGO, CALIFORNIA 92I2I-2974
PHONE 858 558-6900 - FAX 858 558-6159
VILLAGES OF LA COSTA-THE GREENS
CARLSBAD, CALIFORNIA
AS/TA DSK/EOOOD DATE 03-24-2000 PROJECT NO. 06403 - 12 - 01 FIG. 1
IVICMAP
APPROVED FILTER FABRIC
6" DIA. PERFORATED
SUBDRAIN PIPE
1" MAX. OPEN-GRADED
AGGREGATE 9 CUBIC FTJFT.
MINIMUM
NOTES:
1 SUBDRAIN PIPE SHOULD BE 5-INCH MINIMUM DIAMETER. PERFORATED, THICK
WALLED SCHEDULE 40 PVC. SLOPED TO DRAJN AT 1 PERCENT MINIMUM AND
CONNECTED TO STORM DRAIN SYSTEM OR APPROVED OUTLET
2.....WHERE DRAIN EXCEEDS 500 FEET, PIPE DIAMETER SHOULD BE INCREASED
TO 8 INCHES
3 FILTER FABRIC TO BE MIRAFI 140N OR EQUIVALENT
NO SCALE
TYPICAL SUBDRAIN DETAIL
GEOCON
INCORPORATED O
GEOTECHNICAL CONSULTANTS
6960 FLINDERS DRIVE - SAN DIEGO, CALIFORNIA 92121-2974
PHONE 619 558-6900 - FAX 619 558-6159
AS/AML DSK/EOOOO
VILLAGES OF LA COSTA - THE GREENS
CARLSBAD, CALIFORNIA
DATE 03-24-2000 PROJECT NO. 06403 - 12 - 01 FIG. 6
soyixviii/Rss
EXISTING GROUND SURFACE
NO SCALE
NOTES:
1 EXCAVATE BACKCUT AT 1:1 INCLINATION SUCH THAT THE KEY WIDTH AT RNISHED PAD GRADE
IS AS SPECIFIED BY THE SOIL ENGINEER
2. BASE OF BUTTRESS FILL TO BE 5 FEET (OR AS DETERMINED BY SOIL ENGINEER) BELOW ADJACENT PAD
GRADE SLOPING A MINIMUM 2% INTO SLOPE
3 BUTTRESS FILL TO BE COMPOSED OF PROPERLY COMPACTED GRANULAR SOIL Wrm MINIMUM
SHEAR STRENGTH PARAMETERS OF <t>»25°, C^SOOpsf
4- WHERE SEEPAGE IS ENCOUNTERED IN BACKCUT CHIMNEY DRAINS TO BE APPROVED PREFABRICATED
CHIMNEY DRAINS PANELS (MIRADRAIN, TENSAR, OR EQUIVALENT) SPACED APPROXIMATELY 30 FEET
CENTER TO CENTER. ADDITIONAL DRAINS WILL BE REQUIRED WHERE AREAS OF SEEPAGE ARE ENCOUNTERED.
5 FILTER MATERIAL TO BE 1-INCH. OPEN-GRADED CRUSHED ROCK ENCLOSED IN APPROVED FILTER FABRIC
{MIRAFI 140N OR EQUIVALENT).
6 COLLECTOR PIPE TO BE 4-INCH MINIMUM DIAMETER. PERFORATED, THICK-WAUED PVC SCHEDULE 40 OR
EQUIVALENT AND SLOPED TO DRAIN AT 1 PERCENT MINIMUM TO APPROVED OUTLET
TYPICAL BUHRESS DETAIL
GEOCON
INCORPORATED O
GEOTECHNICAL CONSULTANTS
6960 FLANDERS DRIVE • SAN DIEGO, CAUFORNIA 92121-2974
PHONE 619 558-6900 - FAX 619 558-6159
DFL/RSS REV/DFL
VILLAGES OF LA COSTA - THE GREENS
CARLSBAD, CALIFORNIA
DATE 03-24 - 2000 PROJECT NO. 06403 -12 - 01 FIG 7
BUTFiL2 IX-IXVIiraSS
EXISTING GROUND SURFACE
FINISHED SLOPE
UNDISTURBED
FORMATIONAL
SOIL
NO SCALE
NOTES:
1 BASE OF STABILITY FIU TO BE 3 FEET INTO DENSE. FORMATIONAL SOILS SLOPING
A MINIMUM 5% INTO SLOPE
^..-APPROVED PREFABRICATED CHIMNEY DRAIN PANELS (MIRADRAIN, TENSAR, OR EQUIVALENT) SPACED APPROXIMATELY 30 FEET CENTER TO CENTER,
3 FILTER MATERIAL TO BE 1-INCH, OPEN-GRADED CRUSHED ROCK ENCLOSED IN APPROVED FILTER FABRIC
4 COLLECTOR PIPE TO BE 4-INCH MINIMUM DIAMETER. PERFORATED, THICK-WALLED PVC SDR 21 OR
EQUIVALENT AND SLOPED TO DRAIN AT 1 PERCENT MINIMUM TO APPROVED OUTLET
TYPICAL STABILITY FILL DETAIL
m
GEOCON
INCORPORATED O
m
••m
GEOTECHNICAL CONSULTANTS
6960 FLANDERS DRIVE - SAN DIEGO, CAUFORNIA 92121 • 2974
PHONE 619 558-6900 - FAX 619 558-6159
AS/AML DSK/G7YP1
VILLAGES OF LA COSTA - THE GREENS
CARLSBAD, CALIFORNIA
DATE 03 - 24 - 2000 PROJECT NO.06403 -12 - 01 FIGS
STABFIL IV/IXVItRSS
PROJECTNO. 06403-12-01
ASSUMED CONDITIONS:
Slope Height
Slope Inclinatioii
Total Unit Weight of SoU
Angle of Internal Friction
Apparent Cohesion
No Seepage Forces
ANALYSIS:
H = 100 feet
2:1 (Horizontal:Vertical)
Yt = 130 pounds per cubic foot
^ = 30 degrees
C = 500 pounds per square foot
Ac(^ =
FS =
Ac^ =
Ncf =
FS =
YHtanA Equation (3-3), Reference 1
C
Equation (3-2), Reference 1 NcfC
YH
15
47
1.8
Calculated Using Eq. (3-3)
Determined Usii^ Figure 10, Reference 2
Factor of Safety Calculated Using Eq. (3-2)
REFERENCES:
(1) Janbu, N., Stability Analysis of Slopes with Dimcnsionless Parameters, Harvard Soil Mechanics,
Scries No. 46. 1954.
(2) Janbu, N., Discussion of J. M. Bell, Dimcnsionless Parameters for Homogeneous Eartii Slopes,
Journal of Soil Mechanics and Foundation Design, No. SM6, November 1967.
CUT SLOPE STABILITY ANALYSIS
VILLAGES OF LA COSTA - THE GREENS
CARLSBAD, CALIFORmA
FIGURE 9
PROJECT NO. 06403-12-01
ASSUMED CONDITIONS:
Slope Height
Slope Inclination
Total Unit Weight of Soil
Angle of Internal Friction
Apparent Cohesion
No Seepage Forces
ANALYSIS:
H = 50 feet
2:1 (Horizontal :Vertical)
Yt = 130 pounds per cubic foot
(|) = 25 degrees
C = 300 pounds per square foot
Ac* = VHtanA
c
Equation (3-3), Refereru:e 1
FS = NcfC Equation (3-2), Reference 1
*M YH
M Act* = 10 Calculated Using Eq. (3-3)
Ncf = 34 Deterinined Using Figure 10, Reference 2
•m FS = 1-56 Factor of Safety Calculated Using Eq. (3-2)
REFERENCES:
(1) Janbu, N., Stability Analysis of Slopes with Dimcnsionless Parameters, Harvard Soil Mechanics,
Series No. 46, 1954.
(2) Janbu, N., Discussion of J. M. Bell, Dimcnsionless Parameters for Homogeneous Earth Slopes,
Journal of Soil Mechanics and Foundation Design, No. SM6, November 1967.
FILL SLOPE STABILITY ANALYSIS
VILLAGES OF LA COSTA - THE GREENS
CARLSBAD, CALIFORNIA
FIGURE 10
PROJECTNO. 06403-12-01
ASSUMED CONDITIONS:
Slope Height
Depth of Saturation
Slope Liclination
Slope Angle
Unit Weight of Water
Total Unit Weight of Soil
Angle of Internal Friction
Apparent Cohesion
H = Mnite
Z, - 3 feet
2:1 (Horizontal :Vertical)
i = 26.5 degrees
Yw = 62.4 pounds per cubic foot
Yt = 130 pounds per aibic foot
^ = 25 degrees
C = 300 pounds per square foot
Slope saturated to vertical depth Z below slope face.
Seepage forces parallel to slope face
ANALYSIS:
FS = C-h(r^-yJZcos^ftan^
;^,Zsinzcosz
= 2.4
REFERENCES:
(1) Haefeli, R. The Stability of Slopes Acted Upon by Parallel Seepage. Proc. Second International
Conference, SMFE, Rotterdam, 1948, 1, 57-62.
(2) Skenqjton, A. W., and F. A. Delory, Stability of Natural Slopes in London Clay, Proc. Fourth
International Conference, SMFE, London, 1957,2,378-81.
SURFICIAL SLOPE STABILITY ANALYSIS
VILLAGES OF LA COSTA - THE GREENS
CARLSBAD, CALIFORNIA
FIGURE 11
m
APPENDIX A
FIELD INVESTIGATION
The field investigation was performed during the period of November 4 through December 1, 1999,
and consisted of the excavation of 19 large-diamet^ borings, 11 small-diameter borings, 17 "air-
track" drill holes and 113 exploratory trenches. The approximate locations of borings and trenches are
shown on Figure 2.
The small-diameter borings were advanced to depths ranging firom 26 to 51 feet below grade using an
Ingersol Rand A-300 truck-mounted drill rig equipped with an 8-inch hollow-stem auger. Relatively
undisturbed samples wee obtained by driving a 3-inch split tube sampler 12 inches into the
undisturbed soil mass with a 140-pound hammer falling 30 inches. The sampler was equipped with 1-
inch by 2Va-inch brass sampler rings to facilitate removal and laboratory testing. Standard Penetration
Tests (SPT) were also performed at selected intervals. SPT samples were obtained by driving a 2-inch
split-tube sampler into the "undisturbed" soil mass with blows from a 140-pound hammer falling 30
inches.
The large-diameter borings were advanced to depths ranging firom 25 to 101 feet below existing
grade using an E-120 truck-mounted drill rig equipped with a 30-inch split-tube sampler 12 inches
into the "undisturbed" soil mass with the drill rig Kelly bar. The sampler was equipped with 1-inch-
high by 2V8-inch diameter brass sampler rings to facilitate removal, and laboratory testing. BiUk
samples were also obtained.
An IngersoU-Rand 500 pneumatic percussion, 4-inch-diameter drill with hydraulic pulldown was
used for air-track holes at selected locations. A graphical representation of each of the air-track
borings is presented on Figure A-169 through A-185. The graphs depict the rate (in seconds per foot)
at which the drill penetrated each foot of depth examined.
The backhoe trenches were excavated to depths 35 to 18 feet using a JD 555 trackhoe-equipped with
a 24-inch-wide bucket. Disturbed bulk and chunk samples were obtained at selected locations in the
trenches.
The soils encountered in the borings and backhoe trenches were visually examined, classified, and
logged. Logs of the borings and backhoe trenches and plots of the cone penetrometer soundings are
presented on Figures A*-l through A-168. The logs depict the soil and geologic conditions
encountered and the depth at which samples were obtained.
Project No. 06403-12-01 March 24. 2000
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
HO.
H
SOIL
cuss
(USCS)
BORING LB 1
ELEV. (MSL.) 240
EQUIPMENT
DATE COMPLETED
BUCKET AUGER
11/4/99
i |UJ'
.^1
Q
a-
U
MATERIAL DESCRIPTION
LBl-1
LBl-2
26 -
«h 28 -
LB 1-3
::f:::t: m m m
SM
FILL
\ Loose, humid, dark brown, very Sandy CLAY
SANTIAGO FORMATION
Medium dense, diy, dark yellowish-orange, Silty, fine
to coarse SANDSTONE, random, discontinuous,
caliche filled joints
-Fault: N55W, 54SW, .5' wide, caUche filled
-Possible "drag-structure", (bedding folded into
fault-plane suggesting reverse movement)
Bedding: NlOE, ISE; siltstone 2" thick, abundant
caliche
-Undulatory contact
Stiff, dry, pale olive SILTSTONE interbed,
(^proximately 3* thick
5/12'
-Pinkish-gray below 13 feet
-Bedding: N40W, 21NE (cross bedding?), lenticular
bed less than V thick 6/12' 124.8 10,8
-Bedding: N70E, USE; well defined sandstone beds
g)groximMe2y_2_" Jhi(^
Hard, moist, pale olive CLAYSTONE,
bentonitic/"so£^y" texture, random, discontinuous,
wavy, stained, closed fi^ctures, massive
4/12' 112.2 20.2
- Figure A-1, Log of Boring LB 1 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR SAG SAMPLE
C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG Of SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IM
FEET
SAMPLE
NO.
SOIL
CLASS
CUSCS)
BORING LB 1
ELEV. (MSL.) 240
EQUIPMENT
DATE COMPLETED
BUCKET AUGER
U/4/99
Hyi-
go
a
hi
- 90
MATEiUAL DESCRIPTION
- 92 -
- 94 -
- 96 -
- 98 -
- 100 -
Joints: N20E. 55W. N55E, 40NW; discontinuous,
undulatory
-Slight seepage at 92 feet
WL/CL
ML
CL
-Gradational lower contact
Hard SILTSTONE layer
-Grad^on^J^ioturbated c(mtact_ _
Very hard, moist light olive gray, CLAYSTONE
-End visual log at 100 feet
^1 BORING TERMINATED AT 101 FEET
Figure A-4, Log of Boring LB 1 LCG
SAMPLESYMBOLS E"" ^^P^'"*^ —^SFUL
^ ... DISTURBED OR BAG SAMPLE
E. . STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT WARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TINES.
PROJECT NO. 06403-12-01
BORING LB 2
ELEV. (MSL.) 210
EQUIPMENT
DATE COMPLETED U/18/99
ROTARY BUCKET 30"
MATERL\L DESCRIPTION
O
COLLUVIUM
Stiff, moist, dark gray-brown, Sandy CLAY
-Porous, with shrink crack l/4"-l" wide
-Very irregular, transitional contact
SANTIAGO FORMATION
Very stiff, moist, Ught olive, Silty CLAYSTONE
-Veiy weathered and fractured
-Becomes harder
-Becomes hard to very hard, moist, light olive, Silty
CLAYSTONE
-Horizontal bcdding^ contact
i'»
8/11'
Dense to very dense, damp, light reddish-brown, very
Silty, coarse, SANDSTONE, with trace clay, massive
8/11'
127.2
121.0
21.0
7.1
Ik
p
Ik
Figure A-5, Log of Boring LB 2 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE I... UATER TABLE OR SEEPAGE
MOTE: THE LOG OF SUBSURFACE COHD-ITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
H
SOIL
CLASS
CUSCS)
BORING LB 2
ELEV. (MSL.) 210
EQUIPMENT .
DATE COMPLETED H/18/99
ROTARY BUCKET 30"
Ui
IN
(0° UJ
a
ui
•o u
-I 30
j- 32
MATERIAL DESCRIPTION
•1 34 -
- 36 -
LB2-5
- 38 -
40 -
^ - 48 -
- 50 H
^ I- 52 H
CL
LB2-6
LB2-7
-Inclined depositional contact (N50E, 20S), with fine
gravel layer at 30 feet
Hard, moist, olive. Silty CLAYSTONE; fractured,
massive
-Fracture; discontmuous, hairline at N-S, 70E, with
jarosite lining and some gypsum, and normal
slickenside-striations
-Minor secondary fault
-Becomes harder, less fractured, with scattered
grit-size sand
20/10* 127.5 12.1
BORING TERMINATED AT 54 FEET
Figure A-6, Log of Borings LB 2 LCG
' SAMPLE SYMBOLS ° - '"^''^'^ UNSUCCESSFUL
W ... DISTURBED OR BAG SAMPLE
E.
&.
. STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 3
ELEV. (MSL.) 235
EQUIPMENT
DATE COMPLETED 11/18/99
ROTARY BUCKET 30"
UJ
Q.
go
I*-
MATERUL DESCRIPTION
TOPSOEL
Stiff, moist, dark gray-brown, Sandy CLAY
SANTIAGO FORMATION
Dense, damp, light brown to tan, Silty, fine
SANDSTONE, with trace clay
-6" claystone layer; horizontal
-Irregular, near-horizontal, depositional contact, (with
fine gravel, coarse sand)
Very stiff to hard, moist, Ught olive, Silty
CLAYSTONE
-Very fractured, weathered
-Bedding plane shear, horizontal, —1/4-1/2" thick,
with gypsum liner, throughgoing, plastic, wet
-Bedding plane shear, very irregular, l/4"-l/2'
with gypsum, ^proximately southward dip,
throughgoing, plastic, wet, with some sand
-Becomes less weathered and fractured
thick
-Remolded clay seam. N60W. 30NE; l/16"-l/8" thick,
throughgoing, plastic and wet; approximately 4"-6"
thick zone of very fractured wallrock on either side
-Joint/fault (?), N30W, 30NE; l/2"-r thick,
throughgoing, with wet, plastic and jarosiie/gypsum
1X6.1 17.4 y
•1^
I 1 1 rz-f^r^.T/^ 1 1
Figure A-7, Log of Boring LB 3 LCG
SAMPLESYMBOLS ° - ^^"^^"^ UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
B ... STANDARD PENETRATION TEST
G ... CHUNK SAMPLE
1 ... DRIVE SAMPLE (UNDISTURBED)
I ... UATER TABLE OR SEEPAGE
IM
'm
U
m
m
m
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS MOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES,
IP
m
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• O
H
SOIL
CLASS
CUSCS)
BORING LB 3
ELEV. (MSL.) 235
EQUIPMENT
_DATE COMPLETED
ROTARY BUCKET 30"
11/18/99
;ui' y, H
Ui
"-to
>-
a (J
- 30
- 32 -
- 34 -
MATERL\L DESCRIPTION
mi
linings (orange to brown)
Hard, moist, olive to brown, Silty CLAYSTONE
-Fractured, massive
-Near-horizontal contact _ _
Dense, damp, light brown to orange, Silty, fine
SANDSTONE
BORING TERMINATED AT 35 FEET
108.0 21.9
Figure A-8, Log of Boring LB 3 LCG
! SAMPLESYMBOLS ° SAMPLING UNSUCCESSFUL
@ ... DISTURBED OR BAG SAMPLE
c. . STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE JL ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
H
SOIL
CUSS
CUSCS)
BORING LB 4
ELEV. (MSL.) 145
EQUIPMENT
DATE COMPLETED 11/19/99
ROTARY BUCKET 30" ILU si CO
u6
U
m
MATEIUAL DESCRIPTION
- 2 -
- 4 -
6
8
10
h 12 -
14 -
16 -
18 -
- 20 -
- 22 -
- 24 -
- 26 -
- 28 -
LB4-1
LB4-2
LB4-3
LB4-4
CL COLLUVIUM
Stiff, humid, dark gray-brown, Sandy CLAY
TERRACE DEPOSIT
Medium dense to dense, damp, Ught brown-olive,
with reddish-brown mottling. Clayey, fine SAND
SC
ZUML
Very stiff to medium dense, damp, light brown-olive,
very Silty CLAY to Clayey SILT, with some sand,
with white mottlmg of calcium sulfate (gypsum)
-Becomes more sandy
-togul^bedding^ contact; J^70E,_15N
Dense, damp, light brown-tan, Silty, fine SAND
SM
JM-GM
CL
-2" thick, horizontal grit-size sand layer (angular
volcanic grit)
-Near-hqrkont^ traisitional contact_
Very dense, damp, reddish-brown. Gravelly, medimn
to coarse SAND, with angular, fine volcanic
GRAVEL
-Irregular deposition contact, near-horizontal; burrows
into unit below
SANTIAGO FORMATION
Very stiff to hard, moist, olive, Silty CLAYSTONE
-Very fracmred, with discontinuous clay seam,
calcium sulfate (gypsum) linings on fractures
-Becomes less fracmred
BORING TERMINATED AT 30 FEET
124.4 8.9
m
m
m
Mr
• \1
8/10' 122.1 9.8
120.2 14.5
Figure A-9, Log of Boring LB 4 LCG
SAMPLE SYMBOLS ° '"" '^'"-^"^ UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
G ... STANDARD PENETRATION TEST
B ... CHUNK SAMPLE
1 ... DRIVE SAMPLE (UNDISTURBED)
Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 5
ELEV. (MSL.) 165
EQUIPMENT
_DATE COMPLETED
ROTARY BUCKET 30"
11/19/99
UJ cn'
Ulzst a
UJ
MATEIUAL DESCRIPTION
TOPSOIL
Loose, dry, daric gray, Sil^, fine SAND
-Porous
SANTIAGO FORMATION
Dense, humid, light tan, Silty. fine SANDSTONE
-Becomes medium to coarse-grained
8/11' 125.8 11.9
-Cross-bedding inclined 15-20 degrees northward
-Horizontal bedding
Dense, damp, light reddish-brown, Silty, coarse
SANDSTONE
-Becomes gravelly and very moist
-Irregular, interfingering contact, approximately
horizontal
H^d, moist, blue-gray to olive, Sandy SILTSTONE,
with some clay
-Interfingering, transitional contact; approximately
horizon^
Hard", moist, dark olive, Silty CLAYSTONE
-Very fractured, with discontinuous clay seams
8/10'
10 117.2 16.7
Figure A-10, Log of Boring LB 5 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL B ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE I ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-
o
_J
o
X
SOIL
CUSS
CUSCS)
BORING LB 5
ELEV. (MSL.) 165
EQUIPMENT
DATE COMPLETED 11/19/99
ROTARY BUCKET 30"
UJ US go
g u
- 30 MATERL\L DESCRIPTION
- 32 -
- 34 -
-Scattered subangular volcanic clasts
CL .1*
to
BORING TERMINATED AT 35 FEET
m
Ik-
-llr
'to.
m
pi
m
Figure A-11, Log of Boring LB 5 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE & ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC SORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET H
SOIL
CLASS
(USCS)
BORING LB 6
ELEV. (MSL.) 260
EQUIPMENT
DATE COMPLETED U/19/99
ROTARY BUCKET 30" UJ 0= a
MATERIAL DESCRIPTION
2 -
4 -
6 -
8 -
10 -
12 -
14
16 -
18 -
20 -
22 -
24 -
26 -
28 -
LB6-1
LB6-5
LB6-6
SC
ML
LB6-2 mM'S: SM
ML
SM
TOPSOIL
Loose, dry, dark gray-brown, very Clayey, Gravelly
SAND, with angular volcanic clasts
SANTIAGO FORMATION
Medium dense, damp, light brown. Clayey, Sandy
SILTSTONE
-Highly weathered
-Horizontal beds
Dense, damp, reddish-brown, Silty, medium
SANDSTONE, with some clay
Very stiff, moist, light olive, Qayey SILTSTONE
-Gypsum
-Horizontal contact
Dense, damp, reddish-brown, Silty, fine SAND, with
some clay
-12" cemented fossiliferous layer
-Bedding plane shear at 19.5 feet, l/8"-l/4" thick,
horizontal, discontinuous
-Clay sesm (not remolded) N-S, 5W approximately
1-2" thick, very moist, bentonitic?
-Becomes Ught olive to brown
5/9'
11
120.0 12.1
122,1 13.1
?5 igure A-12, Log of Boring LB 6 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C
@ ... DISTURBED OR BAG SAMPLE B
STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
CHUNK SAMPLE IE. ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CLASS
(USCS)
BORING LB 6
ELEV. (MSL.) 260
EQUIPMENT
DATE COMPLETED 11/19/99
ROTARY BUCKET 30"
;tU'
Si
UJ=^
u.
H 0)
z
go
Q
Br UJ
•o u
m
- 30 MATEIUAL DESCRIPTION
- 32 -
- 34 -
36 -
38 -
h 40 -
ML
Dense, moist, light olive. Clayey SILTSTONE
CL
Hard, moist, olive to gray, Sandy CLAYSTONE. with
some silt 20
m m m p
5M-ML
Dense, moist, light olive-brown, very Silty, fine
SANDSTONE to Sandy SILTSTONE
m
m
BORING TERMINATED AT 41 FEET
to
Figure A-13, Log of Boring LB 6 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL C... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE K ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES OHLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 7
ELEV. (MSL.) 220
EQUIPMENT
DATE COMPLETED 11/22/99
ROTARY BUCKET 30" ujtjjjo
ui^m
>-
go
Q
hl>S
u
MATERIAL DESCRIPTION
TOPSOEL
Stiff, hmnid, dark brown, very Sandy CLAY
SANTIAGO FORMATION
Dense, danq), light reddish-brown, Silty
SANDSTONE, with some clay, weathered
-Becomes dark red-brown
-I" thick clay seam (not remolded), N-S, 5'W
Hard, moist, light olive, very Silty CLAYSTONE to
Clayey SILTSTONE
-Becomes sandy
-Joint, fracture, with 1/4" thick clay seam, N30E,
30NW
-Discontinuous clay seams, E-W, 30S (very fractured
claystone with sand)
Hard, moist, medium olive-gray, Silty CLAYSTONE,
with discontinuous slickensided fractures, lypically
random and steep
117.8 7.6
115.3 15.7
Figure A-14, Log of Boring LB 7 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
... DISTURBED OR BAG SAMPLE
E ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLT AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 7
ELEV. (MSL.) 220
EQUIPMENT
DATE COMPLETED 11/22/99
ROTARY BUCKET 30"
go
ui-S
u
MATERIAL DESCRIPTION
Dense, damp, light olive, Sandy SILTSTONE. trace
clay
-Contact_N80E,_10S
Dense, damp, light tan, Silty, fine SANDSTONE
-Becomes reddish-brown (layers)
-Bedding plane shear, N70E, 5S; l/8"-l"
^rou^Som^,_sUdcensided^ wet
HanT, moist, light olive-brown, Sandy CLAYSTONE
Dense, damp, light brown-tan, very Silty, fine
SANDSTONE, massive
-6" cemented layer; lenticular
Hard, moist, olive, Silty, Sandy CLAYSTONE
15
m
•f
•m
m
m
to
U4.6 18.6
20/7'
40/9'
m
m
121.3 14.2
Figure A-15, Log of Boriiig LB 7 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE I ... WATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O
H
SOIL
CLASS
(USCS)
BORING LB 7
ELEV. (MSL.) 220
EQUIPMENT
DATE COMPLETED 11/22/99
ROTARY BUCKET 30"
;ui'
1-u.
guj to a (J
60 MATERIAL DESCRIPTION
JB7-13
BORING TERMINATED AT 61 FEET
?igure A-16, Log of Boring LB 7 LCG
' SAMPLESYMBOLS SAMPLING UNSUCCESSFUL
@ ... DISTURBED OR BAG SAMPLE
C.
B.
. STANDARD PENETRATION TEST 1... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE W. ... UATER TABLE OR SEEPAGE
« NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 8
ELEV. (MSL.) 180
EQUIPMENT
DATE COMPLETED 11/22/99
ROTARY BUCKET 30"
H
;LU'
U.
hi
hi^ta
go
>-b
Q
hi-S
Hfii
u
MATEIUAL DESCRIPTION
LANDSUDE DEBRIS
Stiff, hxmiid, dark brown, very Clayey SAND
Medium dense, damp, light brown, Silty, fine to
medium SAND, with some clay
Medium dense, moist, olive-brown, Cayey, fine
SAND
Medium dense, moist, light olive to red-brown, Sandy
CLAY, with scattered, subrounded to angular volcanic
gravel, (brecciated Santiago formation claystone)
-Remolded cl!^ seam-contact at 19.2 feet at N70E,
12S, l/4jl/2". wet, plasticjnd throughgomg
Mediiun dense, moist to very moist, reddish-brown,
very Clayey, coarse GRAVEL, with angular to
subroimded volcanic clasts; disturbed, non-imbricated
texture (debris-flow?)
-Strong seepage at 25 feet
IP
ilH
SANTIAGO PEAK VOLCANICS
Very weathered, fractured, light olive to
reddish-brown, weak VOLCANIC RCXK. with
oversize floater boulders
BORING TERMINATED AT 27 FEET
REFUSAL
r
X,
r
r
Figure A-17, Log of Boring LB 8 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL C... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE I ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING-OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CLASS
<USCS)
BORING LB 9
ELEV. (MSL.) 140
EQUIPMENT
DATE COMPLETED 11/23/99
ROTARY BUCKET 30"
5W .
CO..*
^ - 0 MATERL\L DESCRIPTION
h 2 -
4 -
6 -
8 -
10 -
12 -
14 -
16 -
18 -
20 -
22 -
24 -
26 -
28 -
LB9-3
LB9-4
SC-CL
GC
CL
CL-SC
GC-SC
FILL
Loose, dry to hiunid. medium olive-brown, very
Gravelly, Clayey SAND
-Scattered 12" boulders, weeds
U7.7 12.9
Loose, moist, reddish-brown, veiy Gravelly CLAY
Soft, moist, light to medium olive. Silly CLAY
-Strong organic odor PUSH 115.1 16.8
Soft, moist, dark brown-olive. Gravelly, Sandy CLAY
-Very strong organic odor
Loose, dry to humid, light reddish-brown, very
Gravelly, Clayey SAND, with rock >10"
Figure A-18, Log of Boring LB 9 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E
@ ... DISTURBED OR BAG SAMPLE B
STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO 8E REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CUSS
<USCS)
BORING LB 9
ELEV. (MSL.) 140
EQUIPMENT
_DATE COMPLETED
ROTARY BUCKET 30"
11/23/99 IN
a:!
go
a: a
UJ
•o u
- 30
MATERIAL DESCRIPTION
h 32 H
34
36
- 38 -
- 40 -
LB9-4
LB9-5
LB9-6
Loose, dry to humid, light reddish-brown, very
Gravelly, Qayey SAND
GC-SC
SC
SANTIAGO FORMATION
Hard, moist, light olive to gray, Sandy CLAYSTONE,
massive
12 UO.l 19.8
BORING TERMINATED AT 41 FEET m
Figure A-19, Log of Boritfg LB 9 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL . STANDARD PENETRATION TEST B ... DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
B. @ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE I... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC SORINGOR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-
U) o -J o X I-H
SOIL
CUSS
(USCS)
BORING LB 10
ELEV. (MSL.) 290
EQUIPMENT
DATE COMPLETED 11/23/99
ROTARY BUCKET 30" Is >•
go
o
MATERIAL DESCRIPTION
[•2 H
f- 4 H
JBlO-1
- 6 --BlO-2
- 8 -
-« - 18 -
4 -
- 20 -
"•L 22 -
m -
^ 26 4
:3io-3 •
:3io-4 I
-BlO-5
- 28 -
m
t
SC-CL TOPSODL
Loose, dry to humid, dark gr^-brown, very Clayey,
fine SAND
SANTUGO FORMATION
Dense, damp, light olive to tan, Silty, fine
SANDSTONE, with some clay, upper 2 feet
-Becomes massive
SM U7.6 9.3
-Becomes light red-brawn
8/10'
6/9' 115.7 12.3
Figure A-20, Log of Boring LB 10 LCG
^ SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
m NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >•
hi 1-a <r _i 3 o O X Z 3 H O _1 Q£ CD
SOIL
CLASS
(USCS)
BORING LB 10
ELEV. (MSL.) 290
EQUIPMENT
DATE COMPLETED 11/23/99
ROTARY BUCKET 30"
SUJ
<c£x
UJ ^9 >• UJ,
a"
I.N*
o!
•O
u
- 30
MATERIAL DESCRIPTION
- 32 -
- 34 -
-BlO-6
- 36 -
- 38 -
- 40 -
- 42 -
- 44 -
- 46 -
- 48 -
- 50 --BlO-9
m m m. m m
•m
m m \m m
m m m. my m m
SM
-Qay seam 1/8' thick, horizontal; not remolded
Dense, moist, light reddish-brown, Silty, fine
SANDSTONE, massive
-Jomt; N30E, 63SE, with black, manganese oxide
coating 14/8-
-Becomes light brown to tan, Silty, very fine
SANDSTONE 14/9'
-Becomes light olive-brown
Ik
I 3<
BORING TERMINATED AT 51.5 FEET
lit
Figure A-21, Log of Boring LB 10 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
C... STANDARD PENETRATION TEST 1... DRIVE SAMPLE (UNDISTURBED)
B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m
?ROJECT NO. 06403-12-01
BORING LB 11
ELEV. (MSL.) 206
EQUIPMENT
DATE COMPLETED 11/24/99
ROTARY BUCKET 30"
;iu'
hi
hi^to
>
Ml
a
Q
u
o
MATERL\L DESCRIPTION
TOPSOIL
Loose, dry, daric brown, very Clayey, fine SAND
SANTIAGO FORMATION
Stiff, moist, olive to brown, Silty CLAYSTONE
-Very weathered and fractured.
-Bedding plane shear with (calcium sulfate);
horizontal
-6* concretion layer at 8 feet-lense
-Abundant horizontal gypsiun seams (1/8-1/2" thick)
1/6' 102.9 20.2
-Horizontal deposition-contact
Dense, damp, reddish-brown, Sil^, medium
SANDSTONE, with some clay 119.0 10.0
-8" fossil shell layer
-1/2" horizontal clay seam; not remolded
Igure A-22, Log of Boring LB 11 LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST H ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
— NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CLASS
(USCS)
BORING LB 11
ELEV. (MSL.) 206
EQUIPMENT
DATE COMPLETED 11/24/99
ROTARY BUCKET 30"
go
O
g6
(J
30
MATERLU- DESCRIPTION
32 -
34 -
36 -
-Bll-6
38 -
40 -
42 -
h 44 -
SC-CL
CL-CH
SM
Hard/dense, moist, reddish-brown, Qayey
SANDSTONE, and Sandy CLAYSTONE
-Alternating beds
-Horizontal bedding^
HanT. very moist, olive, Silty CLAYSToSi
-Fractured, with gypsum-linings
-Remolded clay seams N-S, 40E; discontinuous, 1-2'
zone
Dense, danq), light brown-olive, Silty, fine
SANDSTONE
BORING TERMINATED AT 45 FEET
10 112.7 18.4
»
m
m
m
m
m
Figure A-23, Log of Boring LB 11 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
B ... CHUNK SAMPLE ? ... WATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
m IN
FEET
SOIL
CUSS
(USCS)
BORING LB 11
ELEV, (MSL.) 206
EQUIPMENT
DATE COMPLETED 11/24/99
ROTARY BUCKET 30"
Q_
y-b g
30
32 -
34 -
36 -
38
40
42
44 -{
MATERIAL DESCRIPTION
311-6
SC-CL
CL-CH
Hard/dense, moist, reddish-brown, Cl^ey
SANDSTONE, and Sandy CLAYSTONE
-Alternating beds
-Horizontal bcdding^ ._
Hard, very moist, olive, Silty CLAYSTONE
-Fractured, with gypsum-linings 10 112.7 18.4
-Remolded clay seams N-S, 40E; discontinuous, 1-2*
zone
SM
Dense, damp, light brown-olive, Silty, fine
SANDSTONE
BORING TERMINATED AT 45 FEET
Figure A-23, Log of Boring LB 11 LCG
m 1
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
m
SAMPLE SYMBOLS
@ ... DISTURBED OR BAG SAMPLE &. . CHUNK SAMPLE ¥••• UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
- 0
DEPTH
IN
FEET
SAMPLE
NO.
H
SOIL
CLASS
(USCS)
BORING LB 12
ELEV. (MSL.) 215
EQUIPMENT
DATE COMPLETED 11/24/99
ROTARY BUCKET 30"
MATERIAL DESCRIPTION
-LU'
PC
hi^o to'
go
a u
_ 2 -
- 4 -
J312-1
- 6 -
- 8 -
- 10 -
- 12 -
- 14 -
16 -
- 18 -
- 20 -
- 22 -
- 24 -
-B12-2
^12-3
-B12-4
.B12-5
- 26 -
- 28 -
CL
SM
SM-ML
SM
CL-SC
CL
TOPSOIL
Stiff, humid to dry, daric gray-brown, Sandy CLAY
SANTL\GO FORMATION
Dense, damp, light brown to tan, Silty. fine
SANDSTONE, with coarse lenses, massive
Dense, damp, light olive, very Silty, very fine
SANDSTONE to Sandy SILTSTONE
Dense, damp to moist, Ught brown, Silty, medium
SANDSTONE
-N-S^ lOE, very irregular deposition contact
Hard, moist, olive to brown, Silty, Sandy
CLAYSTONE, with irregular l"-2" lenses of
sandstone, with scattered gravel
Hard, moist, oUve, Silty CLAYSTONE; fracmred,
massive
-Joint with 1/4", jarosite-stained clay lining N80E,
30S
122.9 11.7 I
108.0 20.6
3
Figure A-24, Log of Boring LB 12 LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST a... DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE CHUNK SAMPLE I ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT WARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
30
32 -
- 34 -
SAMPLE
NO.
O X
- 36
~ JR12-6 I
- 38 -
40 -
SOIL
CUSS
(USCS)
ML
BORING LB 12
ELEV, (MSL.) 215
EQUIPMENT
DATE COMPLETED 11/24/99
ROTARY BUCKET 30"
MATERL^L DESCRIPTION
-Slight seepage along fracture
-12' horizontal deposition contact
Very hard, daxap, gray-olive, Sandy SILTSTONE,
with some clay
-Massive, no fractures, difficult drilluag
hi
hiiiia
14/7'
id
ft:" a
BORING TERMINATED AT 41 FEET
Figure A-25, Log of Boring LB 12 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-C3 O .J
o
SOIL
CLASS
(USCS)
BORING LB 13
ELEV. (MSL.) 190
EQUIPMENT
DATE COMPLETED 11/29/99
ROTARY BUCKET 30" zS3
Q
iu^5
u
- 0
MATERIAL DESCRIPTION
- 2 -
- 4 -
-B13-1
6 H
8
10 -
12 -
m m
- 14
- 16 -
JB13-2
^13-3
- 18 -
- 20 -
22 -
24 -
26 -
- 28 -
.B13-4
m m
m
::t:::t
m
CL-SC
SM
vlL-SM
SM
TOPSOIL
Stiff, moist, dark brown to reddish-brown, very
Sandy CLAY
SANTIAGO FORMATION
Dense, damp, light brown. Silty, fme SANDSTONE
116.4 10.6
-Bedding horizontal
Hard, moist, light olive to brown, very Clayey
SILTSTONE, with mterbedded thin SANDSTONE
beds
-Bedding N20W, 8SW
Dense, damp, reddish-brown, SUty, fine
SANDSTONE, with some clay
-Cemented sandstone layer - 8" thick (fossiliferous)
Dense, dan^ to moist, red-brown to olive, SUty. fine
SANDSTONE, with interbedded claystone
-4-5" claystone layer (no remolding)
112.3
118.5
18.9
16.1
Hi
m
Figure A-26, Log of Boring LB 13 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST I
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE Z
DRIVE SAMPLE (UNDISTURBED)
UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
M
DEPTH
IN
FEET
SAMPLE
NO.
H
SOIL
CLASS
(USCS)
BORING LB 13
ELEV. (MSL.) 190
EQUIPMENT ____
DATE COMPLETED 11/29/99
ROTARY BUCKET 30"
^hi^
>-b
a
hi^
30 -
32 -
34 -
MATERLU- DESCRIPTION
-B13-5
36 --B13-6
38 -
40 -
42 -
44 -
46 -
48
50 -
52 -
54 -
56 -
58 -
-B13-7
LB13-8
-B13-9
CL
ML
CL
SP
SM
ML
-4-6" thick cemented sandstone layer
-Sli^tseep^e iperchcd)^
Hard, very moist, olive to brown, Silty CLAYSTONE
-Fractured, cavmg, with water along firactures
-Slight seep^e
Hard, moist, dark olive, Silty CLAYSTONE
Dense, very moist, light olive to brown, medium to
coarse SANDSTONE
Very dense, damp, medium olive-gray, Silty, very
fine SANDSTONE, with trace clay
BORING TERM^
Hard, moist, dark olive, Clayey SILTSTONE
Very hard, moist, olive-gray. Clayey SILTSTONE
-Slight to moderajEely cemented in upper portion
12/9'
20/10'
115.4 15.3
figure A-27, Log of Boring LB 13 LCG
SAMPLE SYMBOLS G ... SAMPLING UNSUCCESSFUL C ..
^ ... DISTURBED OR BAG SAMPLE B ..
. STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>• CD O _J o X I-H -J
SOIL
CLASS
(USCS)
BORING LB 14
ELEV. (MSL.) 195
EQUIPMENT
DATE COMPLETED 11/29/99
ROTARY BUCKET 30"
on •
a: a
a:^
u
- 0
m m m
MATERIAL DESCRIPTION
h 2 -
4 -
6 -
h 8 -
10 -
12 -
«
JB14-1 I:
- 14 -
- 16 -
- 18 -
- 20 -
- 22 -
- 24 -
- 26
- 28 -
::f:
-B14-2
SC
SM
ML
SM
CL
TOPSOIL
Loose, dry, dark gray-brown. Clayey, fine SAND
SANTIAGO FORMATION
Dense, damp, light brown to tan, Silty, fine to
medium SANDSTONE
Dense, damp, light olive, Sandy SILTSTONE, with
trace clay
Very dense, damp, light brown-tan, Silty, fine to
medium SANDSTONE
-Becomes moist
-Veiy irregular scour-contact into weathered
) claystone (to a clay seam). N70E, lOS, wet, plastic,
' 1/2-1" diick
Hard, moist, light olive, very Silty CLAYSTONE,
with some sand interbedded throughout
-Discontinuous clay seams (slickensided fractures and
varying dips in 6" zone)
8/10' 124.2 14.0
•ft'
Figure A-28, Log of Boring LB 14 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
X... ^ ... DISTURBED OR SAG SAMPLE E... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
o
M
SOIL
CLASS
CUSCS)
BORING LB 14
ELEV. (MSL.) 195
EQUIPMENT
DATE COMPLETED 11/29/99
ROTARY BUCKET 30"
H 12
Ui
UI:
CO
hiiiScQ
§^ go
a u
- 30 MATEIUAL DESCRIPTION
-B14-3
- 32 -
- 34 -
- 36 -
- 38 -
- 40 -
15/8'
ML
Very dense, moist, gray-olive, Qayey SILTSTONE;
with some very fine sand
-Horizontal b«iding^
Very hard, moist, dark olive-brown, Silty
CLAYSTONE. massive
-B14-4
314-5
CL
- 42
15/8'
BORING TERMINATED AT 42 FEET
Figure A-29, Log of Boring LB 14 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE & ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
H
SOIL
CLASS
(USCS)
BORING LB 15
ELEV. (MSL.) 250
EQUIPMENT
DATE COMPLETED 11/30/99
ROTARY BUCKET 30"
Ori •
H-^U.
UJ!::JO
UJ uj=;
UJt
>-b
a
- 0
MATERIAL DESCRIPTION
- 2 -
- 4 -
6 -
8 -
- 10 -
12 -
14 -
- 16 -
- 18 -
-B15-1
-B15-2
- 20 --B15-3
- 22 -
- 24 -
- 26 -
- 28 -
SC
CL
CL
SM
LANDSLIDE DEBRIS
Loose, humid, dark brown, very Clayey, fine SAND
-Becomes medium dense, damp, light olive, very
Clayey, fme to coarse SAND
-Highly weathered and fractured
-Clay seam, l/8"-l/4"; N65E, 25N. joint, with
calcium sulfate lining
Stiff, moist, olive, very Sandy CLAYSTONE, with
some silt, very fracmred, weathered
-Fracmre and clay seam; l/8"-l/4"; N60E, 8-lOSE,
wet, plastic and slickensided, throughgoing, with
calciiun sulfate lining
-Remolded clay seam; l/4"-l/2", N50W, 15-20NE;
wet, plastic and throughgoing, with orange iron oxide
staining-base of slide
SANTIAGO FORMATION
Hard, moist, olive, Silty CLAYSTONE; fractured, but
massive and intact
-Becomes medium olive
-Massive, moderate fracwring
-Discontinuous clay seams; zone — 12" thick at N40W,
30^0NE
-Becomes very hard, massive, with few fractures
-Horuont^ transitionjo siltstone ^d san(lstone_
Dense, danq), light brown to tan, Silty, fme
SANDSTONE
-3-6" thick cemented sandstone
1/6' 106.7 21.0
122.2 13.4
Figure A-30, Log of Boring LB 15 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O _1 o X h-H .J
SOIL
CLASS
CUSCS)
BORING LB 15
ELEV. (MSL.) 250
EQUIPMENT
DATE COMPLETED 11/30/99
ROTARY BUCKET 30"
ftUJ'^
hi to' UJ: Ui^m
H'
».
UJ
a
a: Q •o u
30 -
32 -
34 -
36 -
38 -
40 -
MATERIAL DESCRIPTION
-B15-4
-B15-5
-B15-6
20/1 r
-Becomes medium to very coarse-grained and massive
20 128.9 12.4
^11
BORING TERMINATED AT 41 FEET
Figure A-31, Log of Boring LB 15 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
C ... STANDARD PENETRATION TEST
B ... CHUNK SAMPLE
DRIVE SAMPLE (UNDISTURBED)
UATER TABLE OR SEEPAGE
^ NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 16
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/30/99
ROTARY BUCKET 30" Ui=; >-b
a
MATERL\L DESCRIPTION
TOPSOIL
Stiff, humid, dark brown, Sandy CLAY
SANTIAGO FORMATION
Hard, damp, olive-light brown, Sandy CLAYSTONE
-Very fractured and weathered, with calcium sulfate
filling some fractures
Dense, damp, light olive, Qayey SILTSTONE
Dense, damp, light brown to tan, Silty, fine
SANDSTONE, massive
-Irregular depositional contact approximately N-S,
20S ;_no she^ng
Hard, moist, light olive to brown, Sandy
CLAYSTONE to very Clayey, fine SANDSTONE
-Massive, blocky fracturing
Figure A-32, Log of Boring LB 16
8/11" 121.4 13.3
r
LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST 1... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE I ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 16
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/30/99
ROTARY BUCKET 30"
MATERIAL DESCRIPTION
L_|Ul
UJ UI
>
§U^
go
a
bj-5
-Clay seam-contact, N60E, 20SE, 1/16-1/4" thick,
wet, plastic and undulating; with very fractured,
iron-stained zone — 2" on either side
Dense, dazap to moist, li^t brown to olive, SUty,
medium to coarse SANDSTONE, with some clay
. "J?^'!?54.^°°S horizontal contact
Hard, moist, medium olive-brown, Silty
CLAYSTONE
Very hard, damp, dark gray-olive. Clayey
SILTSTONE, with some very fine sand
Dense, damp, light brown, Silty, fine SANDSTONE
BORING TERMINATED AT 52 FEET
- Figure A-33, Log of Boring LB 16
14
16
123.8
20/11'
13.3
128,0 10.5
LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE I ... UATER TABLE OR SEEPAGE
SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 17
ELEV. (MSL.) 240
EQUIPMENT
DATE COMPLETED 12/1/99
ROTARY BUCKET 30"
III"
UJ CQ
gu^ go
OS
a
UJ
•o u
m
m
-t
m
MATERIAL DESCRIPTION
FILL
Soft, humid, mottled dark brown to light olive, SUty
CLAY, with some sand, porous texture, rootlets
SANTIAGO FORMATION
Very stiff, damp, medium olive, Silty CLAYSTONE;
very fractured, britde
-Near-horizontal contact (transitional over several
inches)
Dense, danq), light olive to brown, very Silty, fine
SANDSTONE, with some clay
-6" X 24" lenticular concretion
-Becomes Ught brown to tan, very Silty, fine
SANDSTONE
-Becomes mediimi-grained (orange, horizontal 3" bed)
-Becomes orange, coarse-grained
-Becomes very moist, orange, Silty, very coarse
SANDSTONE
-Slight seepage (perched above sharp, horizontal,
scour-contact
Hard, moist, Ught olive, very Clayey SILTSTONE
-Cemented, fine sandstone, 6'*-8"+-, gray, horizontal
at base
127.4 11.5
8/10'
m
W
W
Figure A-34, Log of Boring LB 17 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
B... UATER TABLE OR SEEPAGE ^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE I ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT WARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 17
ELEV. (MSL.) 240
EQUIPMENT
DATE COMPLETED 12/1/99
ROTARY BUCKET 30"
MATERLVL DESCRIPTION
•LU'
UJ^iP
UJ UJ ^b
Q
as
Dense, wet. light olive, SUty, medium SANDSTONE
-Slight seepage
-Scoured deposition-contact; NlOE, lOW (with - 1"
\ iron-Stained basal layer)
Hard, moist, medium olive, SiTty CLAYKr5NE
-Becomes very sandy Senses)
14 123,4 12.3
-Becomes very hard, dark olive-gray, SUty
CLAYSTONE 20/10*
BORING TERMINATED AT 42 FEET
Hgure A-35, Log of Boring LB 17
• ... SAMPLING UNSUCCESSFUL
LCG
SAMPLE SYMBOLS B... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
- °^ SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS HOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING LB 18
ELEV. (MSL.) 215
EQUIPMENT
DATE COMPLETED 12/1/99
ROTARY BUCKET 30"
Hyi-
hiiio zfS-J hi}ffta
go
>-b
a
UJ
as
u
MATERLVL DESCRIPTION
COLLUVIUM
Soft, damp, dark brown, Sandy CLAY
SANTIAGO FORMATION
Hard, moist, medium light, olive-brown, very Silty
CLAYSTONE
Dense, damp, Ught brown to tan, SUty, fine
SANDSTONE
-Near-horizontal contact
Hard, moist, light medium olive, Sandy
CLAYSTONE, some sUt
-Deposition-contact, N65E, lOS
Dense, damp, light olive-brown, very Sandy
SILTSTONE
-Cemented sandstone layer 12"-f-- thick, - 20" wide
(lense)
-Horizontal contact
Dense, damp, light tan-olive, SUty, fine
SANDSTONE, massive
BORING TERMINATED AT 25 FEET
Figure A-36, Log of Boring LB 18 LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL B... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
CO o _1 a X I-H
SOIL
CLASS
(USCS)
BORING LB 19
ELEV. (MSL.) 275
EQUIPMENT _____
DATE COMPLETED 12/1/99
ROTARY BUCKET 30"
^hl^
mUJ-^ 1^
>-
§u:
a u
2 -
-B19-1
4
6 -
8 -
10 -
12 -
14 -
16 -
18
20
22
-B19-4
-B19-5
24 -
26 -
28 -
m
CL
SC
ML
SM
ML
CL
SM
MATERLU- DESCRIPTION
TOPSOIL
Stiff, damp, daric brown, Sandy CLAY
SANTIAGO FORMATION
Loose to medium dense. danq>, reddish-brown, very
Clayey, fine SAND, with gypsum, very weathered
sandstone
Dense, damp, light olive, Sandy SILTSTONE
Dense, damp, reddish-brown, Silty, fine
SANDSTONE
-FossUiferous, with organic odor
-Cemented sandstone ^conmrion)
-Horizontal bedding^rontact
Dense, moist, reddish-brown, Silty, fine
SANDSTONE; very fossUiferous
Dense, moist, light olive. Clayey SILTSTONE, with
some sand
Very stiff, very moist, medium olive, SUty
CLAYSTONE, with interbedded sandstone
(fossUiferous) and gypsum, and jarosite (iron siUfate)
coatings on fracmres
121.1 9.4
- Figure A-37, Log of Boring LB 19 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL B ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS HOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CUSS
(USCS)
BORING LB 19
ELEV. (MSL.) 275
EQUIPMENT
DATE COMPLETED 12/1/99
ROTARY BUCKET 30"
5W'
UJ
-a» Ui —I >-b a:
a U
IP
•m - 30
MATERUL DESCRIPTION
:^19-6
- 32 -
- 34 -
- 36 -
- 38 -
- 40 -
- 42 -
JB19-9
- 44 -
ML Hard, moist, ohve, SUty CLAYSTONE
-Strong seepage at 34.5 feet
-Horizontal contact
107.2 21.5
CL Hard, wet, medium-dark oUve, SUty CLAYSTONE
-Fractured (with water seepage) and jarosite/gypsum
coatings
-Horizontal contact
Dense, moist, reddish-brown, SUty, medium to coarse
SANDSTONE
m
SM 16
:L-ML
Very hard, moist, dark gray-olive, SUty CLAYSTONE
to Clayey SILTSTONE
m
BORING TERMINATED AT 45 FEET
0
m
m
Figure A-38, Log of Boring LB 19 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL STANDARD PENETRATION TEST
@ ... DISTURBED OR BAG SAMPLE CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED, IT IS MOT WARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
IP
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O -1
o
X
SOIL
CUSS
(USCS)
BORING SB 1
ELEV. (MSL.) 140
EQUIPMENT
DATE COMPLETED
IRA 300
11/11/99 gu.
go
a:
UJS
u
- 0 MATEIUAL DESCRIPTION
h 2 H
4
6
8
10
12
- 14 -
- 16 -
- 18 -
20
22
h 24 H
26
28 H
SBl-1
SBl-2
SBl-3
SBM
SBl-5
I
[
7
V/
/A
\
/
/ /
> A
^A
/A
VIUCL
MUCL
/
/
/ A
ML
ALLUVIUM/COLLUVIUM
Soft, damp, dark yeUowish-brown, Sandy
SILT/CLAY, highly porous, roots
105.9 16.7
TERRACE DEPOSrr
Stiff, damp, pale yellowish-brown, Sandy
SILT/CLAY. slighUy porous
-Becomes dusky yeUow to grayish-orange to pale
yellowish-brown, with dark yeUowish-orange speckles
18
21
-Mottled/stained black
SANTIAGO FORMATION
Very stiff, damp, pale yellowish-orange to
grayish-orange, Sandy SILTSTONE, moderately to
intensely weathered, poorly defined laminations
22
27
- Figure A-39, Log of Boring SB 1 LCG
SAMPLE SYMBOLS 0... SAMPLING UNSUCCESSFUL C... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
-@ ... DISTURBED OR BAG SAMPLE G... CHUNK SAMPLE 1 - • UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES,
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• <D O _I
o
SOIL
CUSS
(USCS)
BORING SB 1
ELEV. (MSL.) 140
EQUIPMENT
DATE COMPLETED
IRA 300
11/11/99
KUI
UI,; a
• u
- 30 MATERL\L DESCRIPTION
SBl-6 MH
\
Very stiff, moist, pale, yeUowish-orange to
grayish-orange, Sandy SILTSTONE, intensely
weathered, wet at tip of sample
16
BORING TERMINATED AT 31.5 FEET
Figure A-40, Log of Boring SB 1 LCG
m SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X WATER TABLE OR SEEPAGE
I1T>^.«°/ SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
01 > hi CD t-O <n -J n a a X 1-H a _I GR SOIL
CLASS
(USCS)
BORING SB 2
ELEV. (MSL.) 115
EQUIPMENT
DATE COMPLETED
IRA 300
11/11/99
UJ UJ
cn, !u. hi.
u
- 0
MATEIUAL DESCRIPTION
2 -
4 -
6 -
8 -
10
12 -
- 14 -
- 16 -
- 18 _
- 20 -
- 22 -
- 24 -
- 26 -
- 28 -
SB2-1
SB2-2
SB2-3
SB2-4
SB2-5
/A
V •A
w
^ A
/
/ A
^^4
^A
A
/
•A
•A
A
^A
A
A
• /
V
VIL/CL
ML/CL
ViL/CL
ALLUVIUM
Very stiff, damp, daric yeUowish-brown,
SILT/CLAY, porous, scattered soU carbonate, flecks
and stringers
19
-Becomes pale yellowish-brown 18 109.4 19,2
0
TERRACE DEPOSIT
Soft to stiff, damp to very moist, dusl^ yellow
SILT/CLAY
-Groimdwater at 15 feet
Stiff, wet, mottled dark yeUowish-orange, elastic
SILT/CLAY 25 104.3 21.6
-Becomes firm, moist to damp, dusky yeUow,
mottled dark yeUowish-orange, SILT/CLAY
Figure A-41, Log of Boring SB 2 LCG
SAMPLE SYMBOLS ° - UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
1] ... STANDARD PENETRATION TEST
B ... CHUNK SAMPLE X...
DRIVE SAMPLE (UNDISTURBED)
UATER TABLE OR SEEPAGE |
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT WARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
- 30
DEPTH
IN
FEET
SAMPLE
NO.
>-hi ca h-o <E -J 3 o C X Z -H C -1 QC CD
SB2-6 ML/CL
SOIL
CUSS
(USCS)
BORING SB 2
ELEV. (MSL.) 115
EQUIPMENT
DATE COMPLETED
IRA 300
11/11/99
MATEIUAL DESCRIPTION
SANTIAGO FORMATION
Stiff, moist to wet, dusky yeUow, mottled dark
yeUowish-orange, SILTSTONE/CLAYSTONE, highly
weathered
BORING TERMINATED AT 31 FEET
Ui Q.'
28
go
UJ^
u
Figure A-42, Log of Boring SB 2 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE G. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
BORING SB 3
ELEV. (MSL.) 101
EQUIPMENT
DATE COMPLETED 11/11/99
IRA 300 UJ^O
UJ
cn' uJs;
gu:
a
CJ
uj^5
z:: •z •o
CJ
IT
MATERIAL DESCRIPTION
2 -
4 -
- 6 -
- 8 -
- 10 -
- 12 -
14 -
16 -
- 18
- 20 -
- 22 -
- 24
SB3-1
SB3-2
SB3-3
SB3-4
ALLUVIUM
Stiff, damp, dark yeUowish-brown, SAl^,
SILT/CLAY
mJCL 16
-Trace of sand below 10 feet
-Groundwater at 11.5 feet
14
VIH/CL
SB3-5
- 26
TERRACE DEPOSIT
Stiff, wet, very pale orange to gray-orange
SILT/CLAY
15
19
:L/ML
-Becomes very stiff, pale to dark yellowish-brown
107.0 22,6
SANTIAGO FORMATION
Stiff, damp to moist, mottled daric yellowish-orange
and yellowish-gray, Sandy CLAYSTONE/SILTSTONE 17
BORING TERMINATED AT 26 FEET
106.1 21.8
Figure A-43, Log Of Boring SB 3 LOG
• ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
SAMPLE SYMBOLS Q... WATER TABLE OR SEEPAGE SAMPLE SYMBOLS ^ ... DISTURBED OR BAG SAMPLE Q... CHUNK SAMPLE X ... WATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
- PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O -J o X I-H
SOIL
CLASS
(USCS)
BORING SB 4
ELEV. (MSL.)
EQUIPMENT
90 DATE COMPLETED
IRA 300
11/11/99
UJ « I
§u:
a
uj-5
u
MATERIAL DESCRIPTION
2 -
4 -
6 -
8 -
10 -
12 -
14 -
16 -
18 -
20 -
22 -
24 -
26 -
28 -
17 'A
SB4-1 A V .
• :A
SB4-2
SB4-3
7 ^
AA
ML/CL
SB4^ l^^S
SB4-5 [
ML
SP
ALLUVIUM
Very stiff, damp, moderate brown to moderate
olive-brown and brownish-black, Sandy SILT/CLAY
18
Very stiff, danq), daric yellowish-brown, Sandy SILT,
small, fingemaU sized sheUs
17
-Groundwater at 13.5 feet
-Charcoal flecks, sampler wet
TERRACE DEPOSIT
Medium dense to dense, very moist to wet,
reddish-brown to brown. Gravelly, fine to coarse
SAND
-Coarse gravel fragments, becomes moist
-WeU graded, fine to coarse sand, wet, graveUy
-Mottled many colors
Figure A-44, Log of Borii^ SB 4
15
25
55
110.8 18.1
LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE G ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOaTIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O _t O X
I-
SOIL
CLASS
(USCS)
BORING SB 4
ELEV. (MSL.)
EQUIPMENT
90 DATE COMPLETED
IRA 300
11/11/99
3H .
>•
go >'b
a
- 30
MATERIAL DESCRIPTION
SB4-6 VlL/CL SANTIAGO FORMATION
Very stiff, moist, yeUowish-gray, Sandy
SILTSTONE/CLAYSTONE
29
BORING TERMINATED AT 31 FEET
Figure A-45, Log of Boring SB 4 LCG
SAMPLE SYMBOLS ° - UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
c. . STANDARD PENETRATION TEST • .
. CHUNK SAMPLE X .
. DRIVE SAMPLE (UNDISTURBED)
lb
. UATER TABLE OR SEEPAGE |
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>• CD O -1 O X
H
SOIL
CLASS
(USCS)
BORING SB 5
ELEV. (MSL.) 75
EQUIPMENT
DATE COMPLETED
IRA 300
11/12/99 co«
|o
BUJ
Q. la
Cfl,.*
u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
6
8
10
12
14
16
18
20
- 22 -
- 24 -
•.A
•A
SB5-1 [ A
••A
• A
SB5-2
SB5-3 [
SB5-4
SB5-5
- 26 -[
V
• /
V
• A
• A
•A V
• A
ALLUVIUM
Very stiff, damp, light olive-gray, Sandy SELT/CLAY
VlL/CL 19
-Becomes very stiff
VlL/CL TERRACE DEPOSIT
Very stiff, very moist, light olive-brown to moderate
yeUowish-brown, Sandy SILT/CLAY
-Groundwater at 19 feet
^H/CL
ML
SANTIAGO FORMATION
Firm, moist, dusky yellow,
SILTSTONE/CLAYSTONE, highly porous, intensely
_weather«l^ ???'E1?"J'™L
Very stiff, wet to saturated, pale olive, fine, Sandy,
SILTSTONE, with 2-4" thick, fine to medium
sandstone interbeds, moderately weathered
27
19
14 104.3 23.2
27
BORING TERMINATED AT 26.5 FEET
Figure A-46, Log of Boring SB 5 LCG
SAMPLE SYMBOLS ° ''' UNSUCCESSFUL
@ ... DISTURBED OR BAG SAMPLE
C. . STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X... WATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT WARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>• CD O _1
a
X
SOIL
CLASS
(USCS)
BORING SB 6
ELEV. (MSL.)
EQUIPMENT
98 DATE COMPLETED
IRA 300
11/12/99
;UJ'
CJ, o
n
§U^
go
a
uj^ ,
as Mr
CJ r
MATEIUAL DESCRIPTION
2 H
4
6
8
10
- 12 -
- 14 -
16
18
20
- 22 -
- 24 -
SB6-1
- 26
SB6-2
SB6-3
SB6-4
A W
A
[
/ A
/
yA
VA ^A VIL/CL
A A
I
[
A
A
V/
• AA
V
SB6-5
A
/A
SM
SM
VIL/CL
VIUCL
ALLUVIUM
Very stiff, dry to damp, pale to moderate
yeUowish-brown, SILT/CLAY, veined with soU
carbonate
28
r
Medium dense, damp, dark yellowish orange, SUty
fine SAND
TERRACE DEPOSIT
Medium dense, damp, dark yeUowish-orange, Silty,
fine to medium SAND
Very stiff to hard, moist, dark yellowish-brown,
mottled olive to orange, SILT/CLAY
SANTIAGO FORMATION
Very stiff to hard, moist, pale olive,
SILTSTONE/CLAYSTONE, moderately weathered
21
25
p.
102.8
"1
m
f
tm
r
BORU^G TERMINATED AT 26 FEET
NO GROUNDWATER ENCOUNTERED
27 108.3 19.5
t
\
I
Figure A-47, Log of Boring SB 6 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
E ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE 1
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
ft
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O
o
X
SOIL
CLASS
(USCS)
BORING SB 7
ELEV. (MSL.) 170
EQUIPMENT
DATE COMPLETED
IRA 300
11/12/99
:uj-
H
Ill MJ-,
I-gu^
gu
y-b
a
- 0
- 2 -
- 4 -
6
8
- 10
- 12
- 14
- 16
- 18 -
20 -
- 22 -
- 24 -
- 26
- 28
SB7-1
SB7-2
SB7-3
SB7^
SB7-5
[ .•1.4
If!
I
[
l-Ll
r. 1
\\[-
I.
.-•1- -1-
i.t|i
[
:! -I-
.l -1-
:i -I-
r- I
:i -I-
MATERIAL DESCRIPTION
AIXUVIUM
Loose to medium dense, dry, light oUve-brown, SUty,
fine to medium SAND, porous, rooUets
SM
-Becomes non porous, mecUum dense
11
22 93.0 5.0
-Laminae, spaced s^roximaiely 6" E^art
SM
TERRACE DEPOSn
Medium dense, humid, grayish-orange, SUty, fine to
medium SAND
Figure A-48, Log of Boring SB 7
13
21 92.4
22
5.4
LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE f ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING SB 7
ELEV. (MSL.) 170
EQUIPMENT
DATE COMPLETED
IRA 300
11/12/99
SUJ^
gu:
a CJ
MATERIAL DESCRIPTION
Medium dense, humid, very pale orange to
grayish-orange, SUty, fine to medium SAND
Hard, damp, moderate yeUowish-brown, Sandy
SILT/CLAY, stringers of soU carbonate
Hard, damp to moist, mottled yeUowish-oranges,
dusky yeUow, SILT, fingemaU sized shell fossils
Stiff, damp to moist, mottled black, dark and pale
yeUowish-brown, Sandy SILT/CLAY
SANTIAGO FORMATION
Very stiff, moist, mottled dark yeUowish-orange,
yellowish-gray, black, SILTSTONE/CLAYSTONE
BORING TERMINATED AT 51 FEET
NO GROUNDWATER ENCOUNTERED
25 95.6
52
56 108.1
13
31 107.8
7.3
0
U.O
t I
21.0 ^
Figure A-49, Log of Boriflig SB 7 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CON&ITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD
a
a
H
SOIL
CLASS
(USCS)
BORING SB 8
ELEV. (MSL.) 110
EQUIPMENT
DATE COMPLETED
IRA 300
11/16/99
Suj^
ujbo
§U^
go
a
g6
u
- 0 MATERIAL DESCRIPTION
2 -
4 -
6
8 -
10 -
I- 12 -
14 -
16 -
18 -
- 20 -
- 22 -
I
I _
- 24 -
- 26 -
- 28 -
SB8-1
SB8-2
SB8-3
SB8-4
SB8-5
A
[
•A
[
I
A
• A
VIL/CL
VIH/CL
ML
ALLUVIUM
Firm, damp, dark yeUowish-brown, Sandy
SILT/CLAY, porous, roots
14 108.8 13.6
-Groundwater at 9.5 feet
-Becomes stiff
-Becomes very stiff to hard, moist, mottled dark
yeUowish-orange, pale olive and dark
yeUowish-brown, SILT/CLAY
14
31 113.9 18.2
Firm, moist, grayish orange to dark yellowish-orange,
Sandy SILT
Stiff, moist, dusky yeUow, motUed daric
yellowish-orange, Sandy SILT, some fine sand,
moderately to intensly weathered
-Becomes clayey
21 103.8 23.5
Figure A-50, Log of Boring SB 8 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL B... STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O
o X I-H
SOIL
CUSS
(USCS)
BORING SB 8
ELEV. (MSL.) 110
EQUIPMENT
DATE COMPLETED
IRA 300
11/16/99
QUJ' °Ui
•2: hiTia
u.
>-b a
UJ
- 30 MATERIAL DESCRIPTION
1 SB8-6
h 32 -
34 -
36
VIL/CL Firm, moist, light oUvc gr^, Sandy
SILTSTONE/CLAYSTONE, intensly weathered
11
SB8-7
Very stiff, moist, oUve black, plastic CLAY,
moderately weathered
CH 18
BORING TERMINATED AT 36 FEET
Figure A-51, Log of Boring SB 8 LCG
SAMPLESYMBOLS °"* SAMPLING UNSUCCESSFUL
@ ... DISTURBED OR BAG SAMPLE
C.
B.
. STANDARD PENETRATION
. CHUNK SAMPLE
TEST 1... DRIVE SAMPLE (UNDISTURBED)
X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
Ik
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>
O -J O X
SOIL
CUSS
(USCS)
BORING SB 9
ELEV. (MSL.) 134
EQUIPMENT
DATE COMPLETED
IRA 300
11/16/99
[UJ-^ CJ.J o
0.
go
Ui^
s|
u
- 0 MATERIAL DESCRIPTION
h 2 -
4 -
6 -
h 8 -
10 -
12 -
- 14 -
- 16 -
- 18 -
- 20 -
- 22 -
- 24 -
- 26 -
- 28 -
SB9-1
SB9-2
SB9-3
SB9-4
SB9-5
[
I
[ • /
'A
ML
5M/ML
VIL/CL
x
5M/ML
ALLUVIUM
Stiff, dry, dark yeUowish-brown, Sandy SILT
Medium dense to stiff, damp, grayish-orange, Sandy
SILT, SUty, fine SAND
Very stiff, damp, pale yeUowish brown, Sandy
SILT/CLAY
-Groundwater at 16 feet
-Becomes ^axsp to moist, dark yellowish-brown, some
fine sand
TERRACE DEPOSrr
Medium dense, moist to wet, dark yeUowish-orange,
Ught oUve-gray, grayish-orange, alternating 1-2'* thick
beds of SUty SAND and SILT
Figure A-52, Log of Boring SB 9
11
16
17
100.7 11.7
21
13
LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C... STANDARD PENETRATION TEST a... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECTNO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O -1 o X I-H
SOIL
CUSS
(USCS)
BORING SB 9
ELEV, (MSL,) 134
EQUIPMENT
DATE COMPLETED 11/16/99
IRA 300
;UJ' tJ, o
<c£\
o
CO
UJ
>-
S-
a
as •o o
IT
MATERIAL DESCRIPTION
30 SB9-6 CL/CH Very stiff to hard, moist, mottled dark
yeUowish-orange, pale oUve, very pale orange, CLAY
-Becomes olive black at 31 feet
BORING TERMINATED AT 31 FEET
26 110.8 20.7 ,
•to
Figure A-53, Log of Boring SB 9 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL C. STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
5-CD O _1
o X h-H
SOIL
CUSS
(USCS)
BORING SB 10
ELEV. (MSL.) 118
EQUIPMENT
DATE COMPLETED
IRA 300
11/16/99
O w5 UJ
>
§u:
go
>-b a: a
hi
u
I- 0 MATERUL DESCRIPTION
- 16
- 18
- 20
- 22
i
- 24
i_
- 26
- 2 -
- 4 H
- 6
- 8
- 10
5BI0-1
ML
ALLUVIUM
Very stiff, damp, daric yeUowish-brown, Sandy SILT,
highly porous, roots
SBlO-2
- 14 -
SP/SM MecUum dense, damp, grayish-orange, poorly graded,
fine to medium SAND/SUty SAND
SBlO-3
SBlO-4
SBlO-5
VIUCL
Very stiff, damp to very moist, daric and moderate
yeUowish-brown, alternating 6" to 1* thick Sandy
SILTS/CLAYS
-Groundwater at 10 feet
Loose to stiff, moist to wet, moderate
yeUowish-brown, SUty, fine SAND, fine, Sandy SILT
VIUSM
SW TERRACE DEPOSIT
Dense, wet to saturated, grayish-orange, weU graded,
fine to coarse SAND
-GraveUy, clayey sand, motUed yeUowish-oranges
CL
SANTIAGO FORMATION
Very stiff, moist, light olive-gray, CLAYSTONE,
moderately weathered, carbonate lined laminae
-Becomes very hard, damp, pale olive, slightly
weathered. 'T)entonitic/soapy* texture
BORING TERMINATED AT 26 FEET
Figure A-54, Log of Boring SB 10
•44-40^
20
13
42
50/5'
106.7 23.7
118,3 15.3
LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
^ NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS-NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
BORING SB 11
ELEV. (MSL.) 153
EQUIPMENT
DATE COMPLETED
IRA 300
11/16/99
Suj^
UJ^tD
gu^
a
UJ^
CJ
MATERIAL DESCRIPTION
AIXUVIUM
Stiff, dry, pale yeUowish-brown. mottled dark
yeUowish-orange, Sandy, Clayey SILT, highly porous,
scattered white soU carbonate
Very stiff, damp, pale yeUowish-brown, Sandy
SILT/CLAY, slightiy porous
25 116.5 17.2
25 116,5 17.2
SANTIAGO FORMATION
Very dense, damp, grayish-orange, mottled olives.
SUty, fine to coarse SANDSTONE, moderately
we^ered
-Cemented
50/4.5' 111.2 11.5
Hard, dry, oUve, motUed browns, CLAYSTONE,
slighUy to moderately weathered
m
35
BORING TERMINATED AT 26.5 FEET
Figure A-55, Log of Boring SB 11 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST a... DRIVE SAMPLE (UNDISTURBED)
SAMPLE SYMBOLS TABLE OR SEEPAGE ^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
^ PROJECT NO. 06403-12-01
DEPTH
"* IN
FEET
* I- 12
SAMPLE
NO.
> C9 O
I-
H
SOIL
CLASS
CUSCS)
TRENCH T 1
ELEV. (MSL.) 125
EQUIPMENT
DATE COMPLETED
TRACKHOE JD 555 24"
11/3/99
MATERL\L DESCRIPTION
f few
ujgg
UJ UJ
go as
u
2 -
4
- 8
t..
TM
Tl-2
CL
COLLUVIUM
Very stiff, dry, brownish black, Sandy CLAY
ML
ALLUVIUM
Very stiff, dry, Ught olive brbwn to dusky yellow,
Sandy SILT with lenses of brownish black clay up
to 2 feet thick, highly porous, abundant soU
carbonate
SM SANTIAGO FORMATION
Dense, dry, dusky ycUow to dark yeUowish orange,
SUty, fine to medium SANDSTONE
TRENCH TERMINATED AT 13 FEET
Figure A-56, Log of Trench T 1 LCG
t SAMPLE SYMBOLS ° - ^'''"^'"^ UNSUCCESSFUL C ... STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED)
' @ ... DISTURBED OR BAG SAMPLE B •.. CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
^ NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
m
TRENCH T 2
ELEV. (MSL.) 105
EQUIPMENT
DATE COMPLETED
TRACKHOE JD 555 24"
11/3/99
12
UI
ui: UJ^lO
>-
go
CJ
MATEIUAL DESCRIPTION J m
COLLUVIUM
Very stiff, dry, brownish black, Sandy
SILT/CLAY, some fine grained sand, highly
porous, abunidant sea shells
Very stiff, dry, light to moderate olive brown,
SILT, some fine sand, highly porous
SANTIAGO FORMATION
Dense, dry, dusky yeUow to dark yellowish orange,
SUty, fine to medium SANDSTONE
TRENCH TERMINATED AT 12 FEET
Figure A-57, Log of Trench T 2 LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS B. ^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
A
m r
J
SAMPLE
NO.
> CD a -I o
H
SOIL
CLASS
(USCS)
TRENCH T 3
ELEV. (MSL.) 135
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
H'
a
St
CJ
MATERIAL DESCRIPTION
2 -
4 -
T3-1
* h 6
CL
ML
COLLUVIUM
Stiff, dry, dark yeUowish brown, SUty CLAY,
some fine sand, highly porous, abundant rootlets
SANTIAGO FORMATION
Medium stiff to stiff, damp, motUed oranges,
olives and browns. Sandy SILTSTONE, abundant
roodets and soU carbonate, highly weathered
TRENCH TERMINATED AT 6 FEET
Figure A-58, Log of Trench T 3 LCG
- r SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
•M NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T 4
ELEV. (MSL.) 190
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
;UJ' U,
Kfe«
UJ^O
UJ
CO' hl'st
UJ
a
a
- 0 MATERL^L DESCRIPTION
m
COLLUVIUM
Very stiff, dry, pale yellowish brown, CLAY,
some fine sand
SANTIAGO FORMATION
Stiff, damp, greenish gray, CLAYSTONE widi fine
SAND, fractured, random orientations, moderately
weaUiered, massive
-Less fractured, slightly weathered
-Coniaa undulatory, but generaUy horizontal,
poorly defined Sandy CLAYSTONE
TRENCH TERMINATED AT 11 FEET
m
Figure A-59, Log of Trench T 4 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
@ ... DISTURBED OR BAG SAMPLE
C ... STANDARD PENETRATION TEST
B ... CHUNK SAMPLE
• ... DRIVE SAMPLE (UNDISTURBED
X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O
d
X H-H
SOIL
CUSS
(USCS)
TRENCH T 5
ELEV. (MSL.) 165
EQUIPMENT
DATE COMPLETED
TRACKHOE JD 555 24"
11/3/99
H-^U.
UJ^CQ
gu:
go
^b u
- 0 MATERIAL DESCRIPTION
2 -
- 4 -
- 6 -
8 -
10
CL
COLLUVIUM
Stiff, dry, pale to dark yellowish brown, SUty
CLAY, some fine to mediimi sand
SM
SANTIAGO FORMATION
Loose, dry, very pale orange, SUty, fine to medium
SANDSTONE, weathered, approxunately
horizontal, undulatory lower contact
MH Stiff, dry to damp, light olive-gray SILTSTONE.
\ intensly fracmred, moderately weathei^
TRENCH TERMINATED AT 10 FEET
Figure A-60, Log of Tren^:hT 5 LCG
SAMPLE SYMBOLS D... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
m
SAMPLE SYMBOLS
@ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE^ OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T 6
ELEV. (MSL.) 230
EQUIPMENT
DATE COMPLETED
TRACKHOE JD 555 24"
11/3/99
;UJ'
K^U. 03. :u.
* UJ
a
a
•r
l»
IP'
MATERL\L DESCRIPTION
LANDSUDE DEBRIS
Stiff, dry, pale yeUowish brown, SILT/CLAY,
some fii^ and mediiun sand, abimdant rooUets,
porous _
Stiff, dry, greenish gray to gyayish olive, very
Clayey SILT; weatherwl fractured, abundant
calcium sulfate and carbonate, mottled dark
yeUowish orange, scattered roots
-Grooved, sUp plane. N80E, 45 degrees N.
SANTIAGO FORMATION
Hard, damp, medium to light olive, very SUty
CLAYSTONE
-Thin calcium sulfate (gypsimi) coatmgs along
blocky fractures
TRENCH TERMINATED AT 8 FEET
/
' Ik
m
m
W
m
r
-to
•m
Ml
W
Ml
IK,
Figure A-61, Log of Trench T 6 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL B... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
I'
PROJECT NO. 06403-12-01
TRENCH T 7
ELEV. (MSL.) 210
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
go
a
MATERIAL DESCRIPTION
COIXUVIUM
Stiff, dry, moderate yeUowish brown, CLAY/SILT,
abundant rooUets
LANDSUDE D^US
Stiff, dry to dan^. light olive gray to greenish
gray Sandy SILT/CLAY, massive, moderately to
highly fractured and weathered, "punky'/motUed
appearance with "blebs" of Sandy material, porous,
abundam soU carbonate and sulfate (gypsum)
-Abundant randomly-oriented fractures and clay
seams
-Approx. 2-3 feet transition to near-horizontal
contact
SANTIAGO FORMATION
Hard, damp to moist, olive to brown, SUty
CLAYSTONE
-Massive to horizontal
TRENCH TERMINATED AT 17 FEET
Figure A-62, Log of Trench T 7 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST I... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CUSS
(USCS)
TRENCH T 8
ELEV. (MSL.) 250
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
;UJ'
HSU.
hi hi a
- 0
MATEIUAL DESCRIPTION
2 -
4 -
h 6 -
T8-1
ML
VIL/CL
COLLUVIUM
Stiff, dry, pale yeUowish brown, SILT, some fine
sand, rooUets, soil carbonate
SANTIAGO FORMATION
Stiff, dry, light brown, Ught olive gray, Ught olive
brown, predominanUy Sandy
SILTSTONE/CLAYSTONE, beds less Uian 1/4"
fliick, SUty SANDSTONE interbedded; beds
generaUy horizontal in places
IV-
m
m
m
m
TRENCH TERMINATED AT 7 FEET
C
C
Figure A-63, Log of Trench T 8 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL D... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION-AND AT THE
DATE INDICATED. IT IS NOT WARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
CD O _1 SOIL
CUSS
(Uses)
TRENCH T 9
ELEV. (MSL.) 155
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24" UJ
CO,,*
a
hi>S
as
u
- 0 MATERL\L DESCRIPTION
zzz - 2 -
- 4 -
T9-1
T9-2
ML m m m SM V
TOPSOIL
Stiff, dry, moderate yeUowish brown. SILT,
abundant rooUets
SANTIAGO FORMATION
Medium dense, dry, yeUowish gray, fine. SUty
SANDSTONE. sUghUy weaUiered, random
fractures less than 2" ^art, carbonate Imed
-Horizontal contact at 3 feet
-Becomes very pale orange. SUty, fine to medium
SANDSTONE
TRENCH TERMINATED AT 5 FEET
Figure A-64, Log of Trench T 9 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
m SAMPLE SYMBOLS
@ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>• CD O _l
o
X
SOIL
CLASS
(USCS)
TRENCH T 10
ELEV. (MSL.) 260
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
a
UJ^
u
- 0
- 2 -
- 4 -
- 6 -
TlO-1
- 8
/ SC
WUSM
MATERIAL DESCRIPTION
TOPSOEL/COLLUVIUM
Stiff, moderate yellowish brown. Clayey, fine to
medium SAND
SANTIAGO FORMATION
Stiff, dry to damp, fine, Sandy SILTSTONE/SUty
SANDSTONE, upper 6" cemented and fossUiferous;
underlain by 6" thick, dark yeUowish orange, bed
dipping approx. N-S/5W, beds below arc very pale
orange and between 6" and 1* thick, moderately
weathered, soU carbonate
TRENCH TERMINATED AT 8 FEET
Figure A-65, Log of Trenth T 10 LCG
SAMPLE SYMBOLS ° ""' '^''^"'^ ""SUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
C. . STANDARD PENETRATION TEST 1... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X... WATER TABLE OR SEEPAGE
w
p
W
Ik
r
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
IP
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O
o X I-
SOIL
CLASS
(USCS)
TRENCH T 11
ELEV. (MSL.) 225
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24" UJ=;
gu:
a u
MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6
- 8
10
12
SC TOPSOIL
Stiff, dry, moderate yellowish brown. Clayey, fine
to medium SAND
VIUCL
3
i
SANTIAGO FORMATION
Stiff, damp. Ught oUve gray,
SILTSTONE/CLAYSTONE, highly weaUiered.
grades downward to fine, SUty SAND below 4 feet
-Bedding plane/contact stained dark yeUowish
(»^ge^(Ui>^ap^x. N45W/15SW_
Medium dense, dry, very pale orange, fine to
medium SUty SANDSTONE
SM
-Bedding plane dips paraUel to above
TRENCH TERMINATED AT 12 FEET
Figure A-66, Log of Trench T 11 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL C... STANDARD PENETRATION TEST I... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-
CO o -I a X 1-H
SOIL
CUSS
(USCS)
TRENCH T 12
ELEV. (MSL.) 165
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
;UJ'
Hi
iUJ:
:U. §U^
UJ,;
• u
ft:
Q (J
- 0 MATEIUAL DESCRIPTION
- 2 -
- 4 -
6 -
8 -
h 10 -
- 12
/ VIL/CL
ML
COLLUVIUM
Stiff, dry, brownish black, SILT/CLAY, abundant
rootlets below 3 feet, abundant soU carbonate,
becomes dusky yeUow, "punky", transitioiUng to
formational below 5 feet
SANTIAGO FORMATION
Stiff, dry to damp, light olive gray, Sandy
SILTSTONE, massive, scattered, random,
discontinuous closed joints
TRENCH TERMINATED AT 12 FEET
IT
Figure A-67, Log of Trench T 12 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST H ... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE H ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O
o
X
SOIL
CLASS
(USCS)
TRENCH T 13
ELEV. (MSL.) 140
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
H' i> UI a
>-b
a
u
UJ5*
- 0 MATERIAL DESCRIPTION
2 -
4 -
6 -
8 -
ZL/ML
COLLUVIUM
Stiff, dry, brownish black. SILT/CLAY, fine roots
-Becomes dusky yellow, "punky", abundant soU
carbonate
CL
SANTIAGO FORMATION
Stiff, dry to damp, light olive gray (molded daiic
yeUowish orange to 7 feet) Sandy CLAYSTONE,
massive, scattered, random, disomtinuous closed
joints
TRENCH TERMG^ATED AT 9 FEET
Figure A-68, Log of Trench T 13 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR SAG SAMPLE B ... CHUNK SAMPLE Z... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T 14
ELEV. (MSL.) 95
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
;U1'
to >-b
a
hi-S
MATERIAL DESCRIPTION
COLLUVIUM
Stiff, dry to damp, dark yellowish brown, Sandy
SILT/CLAY
-Becomes moist, medium stiff
Wet, soft
-Becomes saturated, very soft
SANTIAGO FORMATION
Firm, wet to samrated, pale olive CLAYSTONE ,
highly weathered, "punky" /•
TRENCH TERMINATED AT 13 FEET
STANDING WATER AT 13 FEET
CAVING BELOW 8 FEET
•r
M
m
m
0
Ml
m
Figure A-69, Log of Trench T 14 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>
O _l o
X
I-
SOIL
CUSS
(USCS)
TRENCH T 15
ELEV. (MSL.) 115
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
iUJ'
UJ
§UI
a.
Sul
UJ.
a
hl^
as
u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
m m
• * ^ • <
CL
\
COLLUVIUM
Stiff, humid, dark gray-brown, Sandy CLAY, with
some sUt
-Very moist, soft, with discontinuous slickensided
cl^ seams mclin^ out-of-slope 10 - 20 degrees
wiUi calcitmi carbonate
SM SANTIAGO FORMATION
Very dense, damp, Ught tan-brown, SUty, fine
SANDSTONE
-Bedding laminated, 2-4" beds at N30W, lOSW
/
TRENCH TERMINATED AT 7.5 FEET
Figure A-70, Log of Trench T 15 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR SAG SAMPLE E ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T 16
ELEV. (MSL.) 120
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
;uj^
I-
uj^oa
Ui
a
a:
Q
CO
^E
u MATERIAL DESCRIPTION
TOPSOIL
Stiff, humid, dark gray-brown, Sandy CLAY
SANTIAGO FORMATION
Very stiff, moist, olive-brown, very SUty
CLAYSTONE
-Becomes hard
-Near-horizontal contact
Dense, damp, Ught tan, fine SANDSTONE,
non-cohesive when disturbed
-SlighUy cemented
TRENCH TERMINATED AT 9 FEET
Figure A-71, Log of Trench T 16 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
0
Ik
m NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O -I
o
SOIL
CUSS
(USCS)
TRENCH T17
ELEV. (MSL.) 135
EQUIPMENT
DATE COMPLETED 11/3/99
TRACKHOE JD 555 24"
Ori .
l-5u_ <c£\
go as
u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6
- 8
CL
VIL/CL
COLLUVIUM
Soft to stiff, moist, dark brown, Sandy CLAY
-With some silt
-Becomes very moist
SANTIAGO FORMATION
Very stiff to hard, moist, olive-brown, very
Clayey SILTSTONE, moderately weathered and
fractured, blocky
-Beddmg N-S, lOW (hematitic layer)
TRENCH TERMINATED AT 9 FEET
- Figure A-72, Log of Trench T 17 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
E.
SAMPLE (UNDISTURBED)
m @ ... DISTURBED OR BAG SAMPLE E. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-C9 O -I O X
H
SOIL
CUSS
(USCS)
TRENCH T 18
ELEV. (MSL.) 145
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24"
P2§ UJ
IUJ: ujgaa
U.
*
u
*
UJ. is ^
- 0 MATEIUAL DESCRIPTION
- 2 -
- 4 -
- 6 -
CL TOPSOEL
Stiff, humid, dark brown, Sandy CLAY
SANTIAGO FORMATION
Hard, damp, olive-gray, Silty CLAYSTONE
-Massive, with blocky fractures
CL
,m
TRENCH TERMINATED AT 7 FEET
0
IMl
0
Ih
0
m
m
^'0
Figure A-73, Log of Trench T 18 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
O
o X I-H
SOIL
CLASS
CUSCS)
TRENCH T 18
ELEV. (MSL.) 145
EQUIPMENT ____
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24"
H
;UJ' CJ,
UJ^O
gu:
a
ui-5
gS
o
^ - 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
CL TOPSOIL
Stiff, humid, daric brown. Sandy CLAY
SANTIAGO FORMATION
Hard, damp, olive-gray, Silty CLAYSTONE
-Massive, with blocl^ fractures
CL
TRENCH TERMINATED AT 7 FEET
Figure A-73, Log of Trench T 18 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>• CD O -I o X t-H
SOIL
CUSS
(USCS)
TRENCH T 19
ELEV. (MSL.) 160
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JfD 555 24" Sag
ta UJ UJ
go
>-b
a
uj<5
u
- 0 MATERIAL DESCRIPTION
2 -
4 -
- 6 -
- 8 -
CL
CL \
COLLUVIUM
Soft to stiff, very moist, dark brown Sandy CLAY,
with discontinuous random slickensided soil
fractures; dipping 30-45 degrees out-of-slope
(slope creep?)
m
m
m
m
-1-2' transition to massive, approx. horizontal
contact
SANTIAGO FORMATION
Stiff to very stiff, very moist, olive brown, Sandy
CLAYSTONE
-Very weathered and fractured
TRENCH TERMINATED AT 9 FEET
0
hM
0
to
m
to
p>
to.
Figure A-74, Log of Trench T 19 LCG
SAMPLE SYMBOLS ° ^^"^^^'"^ UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
0
0
0
to
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
to
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O
H _1
SOIL
CLASS
(USCS)
TRENCH T20
ELEV. (MSL.) 160
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24"
o
H
^coo >-b
Q CJ
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8 -
COIiUVIUM
Stiff, moist, dark brown, Sandy CLAY
CL
CL \
-Becomes soft, very moist
-6-12" transition to irregular, near-horizontal
contact
SANTIAGO FORMATION
Very stiff, very moist, olive brown, Silty
CLAYSTONE (very weadiered)
TRENCH TERMINATED AT 9.5 FEET
Figure A-75, Log of Trench T 20 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
«• NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD
a
H
SOIL
CLASS
(USCS)
TRENCH T21
ELEV. (MSL.) 117
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24"
gu.
go
a
^ ,Ni
o
- 0 MATEIUAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8 -
- 10
CL
COLLUVIUM
Stiff, moist, dark gray-brown, Silty CLAY, witii
some sand
-Becomes soft
-Irregular contact
VIL-CL
SANTIAGO FORMATION
Stiff to very stiff, moist, light olive to brown, very
Clayey SILTSTONE to CLAYSTONE
-Very weathered
TRENCH TERMINATED AT 10 FEET
Figure A-76, Log of Trench T 21 LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
..... ur j«Qjunr«k,[: uuNuiiiuna snuwN ncKCUN AKKLlts UNLT Al iMt SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O _1
o
I-
SOIL
CLASS
(USCS)
TRENCH T22
ELEV. (MSL.) 113
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24"
sui
i-gu_
UJ D.'
CO.;
hi^
u
- 0
- 2 -
- 4 -
- 6 -
- 8 -
- 10 -
12 -
- 14 -
r
- 16 -
h 18
CL
:L-ML
MATERIAL DESCRIPTION
ALLUVIUM
Stiff to very stiff, damp, dark gray-brown, Sandy
CLAY, with some silt, root-voids, rootiets.
burrows
-Becomes massive
-Becomes very stiff, moist, medimn brown-olive,
very Silty CLAY, with littie root-voids, burrows
-Massive
TERRACE DEPOSIT
Very stiff, moist to wet light olive to brown, very
Silty CLAY to Qayey SILT
-Seepage at 15.5 feet
TRENCH TERMINATED AT 18 FEET
* Figure A-77, Log of Trench T 22 LOG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
^ DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATI(»tS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T23
ELEV. (MSL.) 105
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24"
m
uj
cn
UJ^^
U.
H CO
z
go
C3
Pi-
co UJ
05 »
CJ 1.^
MATERL\L DESCRIPTION
AIXUVIUM
Stiff to very stiff, humid, dark gray-brown, Sandy
CLAY
-Numerous root-voids, rootlets, massive
114.3 10,8
TERRACE DEPOSIT
Medium dense, damp, brown-olive, very Silty, fme
SAND, with some clay, massive, blocl^
Very stiff, moist, light reddish-brown, very
SUty/Sandy CLAY
-Becomes massive
-Strong water seepage
m
la
. m
lip
m
u
m
TRENCH TERMINATED AT 17.5 FEET
Figure A-78, Log of Trench T 23 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL B ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)*
... DISTURBED OR BAG SAMPLE B ... CHUN< SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CUSS
(USCS)
TRENCH T24
ELEV. (MSL.) 126
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24" UJs: UJ
COi
>
iu. gci
:>~b
a
ui^
cof^
O
- 0 MATERLM- DESCRIPTION
- 2 -
- 4 -
6 -
8
10 -
12 -
14 -
CL TOPSOIL
Stiff, humid, dark gray-brown, Sandy CLAY
SC
TERRACE DEPOSIT
Medium dense, dan^, light reddish-brown.
Clayey, fine SAND
-Calcium carbonate linings
-Massive with indistinct lenses of sandy or sil^
cl^, numerous root-voids and calcium
caibonate-lmed fractures, scattered carbon
fragments and pisolites of iron oxide
/
112.5 7.9
U6.3 11.5
-Calcium carbonate linings
m
m
TRENCH TERMINATED AT 15 FEET
Figure A-79, Log of Trench T 24 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE CKUN< SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T 25
ELEV. (MSL.) 137
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24"
H
;ui'
i! <t2:\ go
a u
IP
m MATERIAL DESCRIPTION
COLLUVIUM
Very stiff, damp to moist, dark gray-brown, Sandy
CLAY
-Massive, with root-voids, rootiets
TERRACE DEPOSIT
Very stiff, moist to very moist, light brown, Sandy
CLAY
-Massive, with root-voids
-Irregular, near-horizontal contact
SANTIAGO FORMATION
Stiff to very stiff, moist, light olive, very Silty
CLAYSTONE
-Very fractured and weathered
m
.IB
0
0
to
0
/
TRENCH TERMINATED AT 14 FEET
I
L
L
L
Figure A-80, Log of Trench T 25 LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
0
Ik
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
(JS o _1 o SOIL
CUSS
(USCS)
TRENCH T 26
ELEV. (MSL.) 137
EQUIPMENT
DATE COMPLETED 11/4/99
TRACKHOE JD 555 24"
f2§ go
>-b
K
a
UJ
•o u
- 0
MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
8
10
12
14
ALLUVIUM
Stiff, moist, dark olive-brown, Sandy CLAY, with
some silt, root-voids and rootiets
CL
CL
TERRACE DEPOSIT
Stiff to very stiff, moist, light brown, very Sandy
CLAY
0
TRENCH TERMINATED AT 14 FEET
0
m
m
Figure A-81, Log of Trench T 26 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T 27
ELEV. (MSL.) 146
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
H
;ui'
UJ^ip
is
hi^ca
gu:
go
^b
Q-Q
hl^
O
MATERLU- DESCRIPTION
TOPSOIL
Stiff, humid, dark gray-brown, Sandy CLAY
TERRACE DEPOSIT
Medium dense, damp, reddish-brown, very Clayey,
fine SAND, massive, blocl^, with calcium
carbonate, mottiing
-Sheared_beddinj clay^scMn^ N30W,_25SW
Soft to stiff, very moist, light olive, Silty plastic
CLAY
_-Numerous,_sljckensid^ VCT^ fractured
Medium dense, damp, light brown, very Clayey,
very fine SAND
-Massive, blocky, with 1/4"-H- charcoal fragments,
with some silt
TRENCH TERMINATED AT 11 FEET
108.2 19.8
m
u
m
Figure A-82, Log of Trench T 27 LCG
SAMPLESYMBOLS E'" SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
E.
. STANDARD PENETRATION
. CHUNK SAMPLE
TEST 1... DRIVE SAMPLE (UNDISTURBED)
X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
^ PROJECTNO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CLASS
(USCS)
TRENCH T28
ELEV. (MSL.) 93
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
o H I-<£.
u
- 0
MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8 -
- 10 -
- 12 -
- 14 -
- 16
JM-GM
CL
SM
FILL
Loose, dry to humid, light brown, Silty, Gravelly,
fine SAND, with oversize cotu;rete, wood, trash
ALLUVIUM
Stiff, moist, dark gn^-brown, Sandy CLAY
-Massive, with root-voids, rootiets
TERRACE DEPOSrr
Medium dense, nwist, light brown, Silty, fine
SAND
-Very weathered, with some clay
-Becomes very dense, damp, and cemented
TRENCH TERMINATED AT 16 FEET
Figure A-83, Log of Trench T 28 LCG
SAMPLE SYMBOLS D... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST 1. . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS D... SAMPLING UNSUCCESSFUL
B.
SAMPLE (UNDISTURBED)
^... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>• iD o -I o X H-H _>
SOIL
CLASS
CUSCS)
TRENCH T 29
ELEV. (MSL.) 90
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
H
•US'
u,
UJ tn'
UJ o
lb
0
- 0 MATEIUAL DESCRIPTION
Ik.
h 2 -
4 -
6 -
8 -
10 -
12 -
14 -
COLLUVIUM
Stiff, damp, dark gray-brown, Sandy CLAY
-Massive, with root-voids and rootiets
CL
SC
m SM
TERRACE DEPOSrr
Medium dense, damp, reddish-brown to olive.
Clayey, fine SAND
-Becomes d^ker brown, with r(x>ts, root-voids
Medium dense to dense, light brown-tan, Silty,
fine to medium SAND, with some clay, fine
root-voids
I
I
TRENCH TERMINATED AT 15 FEET
Figure A-84, Log of Trench T 29 LCG^
SAMPLE SYMBOLS ° - '"^'''''^ UNSUCCESSFUL
W... DISTURBED OR BAG SAMPLE
E ... STANDARD PENETRATION TEST
B ... CHUNK SAMPLE
• DRIVE SAMPLE (UNDISTURBED) p
X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m
It.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-a o _i a
X
I-
H -I
SOIL
CLASS
CUSCS)
TRENCH T30
ELEV. (MSL.) 120
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24" UJ^O 3»1
>-
go
a
!3g
u
- 0 MATERL\L DESCRIPTION
- 2 -
SM
SANTIAGO FORMATION
Very dense, damp, light brown-tan, Silty, medixmi
to coarse SANDSTONE
-Massive
TRENCH TERMINATED AT 3.5 FEET
mi
m
Figure A-85, Log of Trench T 30 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE EJ. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
H
SOIL
CLASS
(USCS)
TRENCH T31
ELEV. (MSL.) 115
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
;UJ'
UJ go
Q
UJ5 a:
co
H UJ
•O
a
- 0
MATERIAL DESCRIPTION
- 2 -
- 4 -
6 -
8
CL
SM
COLLUVIUM
Stiff, moist, daric gray-brown, Sandy CLAY, witii
root-voids, rootiets, burrows
-Becomes soft, very moist
-Irregular, N-inclined contact
SANTIAGO FORMATION
Very dense, damp, light brown to tan, Silty, coarse
SANDSTONE
TRENCH TERMINATED AT 8 FEET
[
Figure A-86, Log of Trench T 31 LCG
^*,™ T- c,^,,,^, o n ... SAMPLING UNSUCCESSFUL
SAMPLE SYMBOLS ^
^ ... DISTURBED OR BAG SAMPLE
E. . STANDARD PENETRATION TEST •... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X... UATER TABLE OR SEEPAGE ^
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CUSS
(USCS)
TRENCH T 32
ELEV. (MSL.)
EQUIPMENT
80 DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
;UJ' O,
to,.*
>-b
a
uj^5
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8
- 10
- 12
- 14 H
- 16
AULUVIUM
Stiff, moist, dark gn^-brown, Sandy CLAY
-Massive, with rootiets, root-voids
CL
SC
Medium dense, very moist, reddish-brown, very
Clayey, medium SAND, with scattered angular
volcanic gravel-clasts near base
-Strong seepage at 14 feet, becomes gravelly
TRENCH TERMINATED AT 16 FEET
Figure A-87, Log of Trench T 32 LCG
mm
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST a. . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
X.
SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
- 0
- 2 -
- 4 -
DEPTH
IN
FEET
6 -
8 -
SAMPLE
NO.
>-C9 O -1 O X H-M
SOIL
CUSS
(USCS)
CL
SM
TRENCH T33
ELEV. (MSL.)
EQUIPMENT
90 DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
MATERIAL DESCRIPTION
COLLUVIUM
Stiff, humid to damp, dark gray-brown, Sandy
CLAY, with scattered angular volcanic
gravel-clasts
SANTIAGO FORMATION
Very dense, damp, light brown to tan, Silty,
medium SANDSTONE
-Massive to faint bedding l^ers
-Bedding; N50W, lOSW
lo^:
cn
cn,.'
>-b
a
UJ5"
u
TRENCH TERMINATED AT 9 FEET
Figure A-88, Log of Trench T 33 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST a... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
0
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. Q6403-12-Q1
""I
0
DEPTH
IN
FEET
SAMPLE
NO.
>
O
X
SOIL
CLASS
(USCS)
TRENCH T34
ELEV. (MSL.) 105
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
iij^
IN go
0
2
- 4 -
- 6 -
8
10
12
14
MATERIAL DESCRIPTION
CL
V
SC
V
AIXUVIUM
Stiff to very stiff, danm, dark grav-brown, Sandy
CLAY
-Massive, root-voids and rootiets
-Becomes more sandy, moist, brown
TERRACE DEPOSIT
Medium dense, moist, reddish-brown, very Qayey,
medium to coarse SAND
-Becomes gravelly at 14 feet, with subangular
volcanic rock
TRENCH TERMINATED AT 15 FEET
REFUSAL ON ROCK
Figure A-89, Log of Trench T 34 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
0 @ ... DISTURBED OR SAG SAMPLE B... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAM>LE
NO.
> CD
a
d
H
SOIL
CUSS
(USCS)
TRENCH T35
ELEV. (MSL.) 120
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
SUJ^
i-ph.
co:
UJ
go
a
- 0 MATERL\L DESCRIPTION
- 2 -
- 4 -
6 -
8 -
10 -
12 -
14 -
CL m m m m
r r i r t m m m m m m m m m
^ TOPSOIL
\ Stiff, dry, dark brown, Sandy CLAY
SANTIAGO FORMATION
Finn or very stiff, damp, light olive, very Silty
CLAYSTONE
-Massive, highly fractured iad weathered
/
CL
SM
-Randomly oriented, discontinuous clay seams
-Contact near-horizontal
Very dense, damp, light brown, Sil^, fine
SANDSTONE
TRENCH TERMINATED AT 15 FEET
Figure A-90, Log of Treoch T 35
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL C. STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED) pr
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... WATER TABLE OR SEEPAGE ^
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m PROJECTNO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
CD O
o
X
H
SOIL
CLASS
(USCS)
TRENCH T36
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
IN
hiix
CO,.'
ft: a
Ui^
o
- 0 MATEIUAL DESCRIPTION
1 - 2 -
- 4 -
- 6 -
- 8
0
SC
ML
TOPSOIL
Loose, dan^, dark brown. Clayey, medium SAND
^ -Clean sand near contact
SANTIAGO FORMATION
Very stiff, firm, moist, redctish-brown to olive,
very CHayey SILTSTONE
-Very fiactured and weathered, with shallow
creep-fractures and smrficial slun^s
-Becking near-horizontal
-Becomes Veiy hard, moist, light olive
\ -Blocky, massive
TRENCH TERMINATED AT 8 FEET
Figure A-91, Log of Trench T 36 LCG
Ml
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
m SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL
B... m @ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X . . WATER TABLE OR SEEPAGE
» NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O -J
o
X
SOIL
CUSS
(USCS)
TRENCH T37
ELEV. (MSL.) 140
EQUIPMENT
DATE COMPLETED 11/5/99
TRACKHOE JD 555 24"
5^
cn
UJ
cn..' uj-:$
?!
Si UJ
•a u
'i P
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
6
8 -
10 -
CL
SC
SM
COLLUVIUM
Stiff, moist, dark gray-brown. Sandy CLAY
TERRACE DEPOSrr
MecKum dense, moist, reddish-brown, very Clayey,
medium to coarse SAND
-Massive, blocky, with angular gravel-clasts of
volcanic rock at base
-Deposition-contact; N80E, 20S
SANTIAGO FORMATION
-V Dense, damp, light brown-tan, Silty, coarse
\ SANDSTONE, massive /
TRENCH TERMINATED AT 11 FEET 0
IP
m
Ik ^-•^^ I*
Figure A-92, Log of Trench T 37 1 1 1 1^
LCG
SAMPLESYMBOLS ° "• ^"'^^^"^ UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
C.
B.
. STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED) T
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE p
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
0
II.
PROJECT NO. 06403-12-01
TRENCH T38
ELEV. (MSL.) 125
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
;LU'
CJ.
a.
Sul
CJ
Q
uiiS
3i_
cn UJ
u
- 0 MATERL\L DESCRIPTION
- 2 -
- 4 -
- 14 -
•m'
COLLimUM/LANDSUDE DEBRIS
Stiff, moist, dark brown, Sandy CLAY, with clasts
of sandstone, porous, with root-voids
-Very irregular, transitional ccmtact, becoming
very moist
-Becomes soft, very moist, mottled light brown to
olive, very Sandy CLAY, with angular chunks of
Santiago formation, sandstone; disturbed, mixed
textures
-Very irregular, wet, plastic, clay seam
SANTIAGO FORMATION
Stiff, very nroist, light olive, Silty CLAYSTONE
-Very weathered and fractured
TRENCH TERMINATED AT 15 FEET
Figure A-93, Log of Trench T 38 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c... STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X . . WATER TABLE OR SEEPAGE
,^ NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T 39
ELEV. (MSL.) 120
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
lUJ'^ a H'
>-b
a (J
MATERUL DESCIUPTION
LANDSLIDE DEBRIS
Stiff, damp, dark gray-brown, Sandy CLAY
-Porous, with roodets, root-voids
-Irregular contact
-Becomes soft, wet, reddish-brown,
Sandy-Gravelly CLAY, with disturbed texture
(brecciated)
-Strong seepage
-Very irregular, plastic clay seam contact (caving)
SANTIAGO FORMATION
Stiff, very moist, light olive, SUty CLAYSTONE
-Very fractured and weathered
TRENCH TERMINATED AT 11 FEET
Figure A-94, Log of Trench T 39 LCG
SAMPLE SYMBOLS ° - '^^'^""^ UNSUCCESSFUL
@ ... DISTURBED OR BAG SAMPLE
C ... STANDARD PENETRATION TEST
B... CHUNK SAMPLE
1 ... DRIVE SAMPLE (UNDISTURBED)
X ... UATER TABLE OR SEEPAGE
m
to.
0
0
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T40
ELEV. (MSL.) 155
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24" cnH UJ tr CQ
>
§^
>-b
Q
hi^
cn Ui
MATERIAL DESCRIPTION
TOPSOEL
Loose, damp, dark brown. Clayey, medium SAND
TERRACE DEPOSrr
Medium dense, damp, reddish-brown. Gravelly,
Silty coarse SAND
-Massive
-Near-horizontal depositional contact
LANDSLIDE DEBRIS
Soft, very moist to wet, light olive-brown, SUty
CLAY
-Disturbed, with numerous clay seams, chunks of
Santiago formation and Jsp
-1-2' remolded clay seam with slickensides; N85W,
40S
SANTIAGO FORMATION
Stiff, very moist, light olive, Silty CLAYSTONE
-Very fractured and weathered
/
TRENCH TERMINATED AT 13 FEET
Figure A-95, Log of Trench T 40 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL B... STANDARD PENETRATION TEST H ... DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
B... @ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
- NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
- 0
DEPTH
IN
FEET
SAMPLE
NO.
>-
to
O _! O X
1—
M
SOIL
CUSS
CUSCS)
TRENCH T41
ELEV. (MSL.) 145
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
MATERIAL DESCRIPTION
IN
cnH UJ:s;
- 2 -
- 4 -
6 -
8 -
h 10 -
- 12
GC
LANDSLIDE DEBRIS
Soft, very moist, light brown to olive, very coarse.
Clayey boulder GRAVEL, with subrounded 6 to
24" volcanic boulders
V
-Strong seepage
-Very irregular contact, inclined southward
CL-CH SANTIAGO FORMATION
Stiff, wet, light olive. SUty CLAYSTONE
-Very fractured, weathered, with clay seams
/
TRENCH TERMINATED AT 12 FEET
Figure A-96, Log of Trench T 41 LCG
SAMPLESYMBOLS ° - ^'^'^'''^ UNSUCCESSFUL
^ ... DISTURBED OR SAG SAMPLE
c.
B.
. STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O
o X I-H
SOIL
CLASS
CUSCS)
TRENCH T42
ELEV. (MSL.) 170
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24" guj
0.
go
^b
o
g6
u
- 0 MATERIAL DESCRIPTION
- 2 H
- 4
- 6 -
8 -
10 -
- 12
CL
\
LANDSLIDE DEBRIS
Stiff, damp to humid, daiic brown, Sandy CLAY
-Becomes soft to stiff, moist, light olive mottled
with recklish-brown, Sil^ ClAY, with scattered
angular volcanic clasts, disturbed, brecciated
texture
-Becon:es very moist to wet
-Strong seepage, caving
-Remolded clay seam, N85W, lOS, approx. 2" thick
-Becomes stiff, wet, light olive-gray, Silty CLAY
-May be very weathered Santiago Formation (?)
TRENCH TERMINATED AT 12 FEET
Figure A-97, Log of Trench T 42 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
« NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>
O SOIL
CUSS
(USCS)
TRENCH T 43
ELEV. (MSL.) 200
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24" sag
UJ hiin
gu:
go
Q u ^
- 0 MATERIAL DESCRIPTION
h 2 -
4 -
6 -
8
CL
CL
\
COLLUVIUM
Stiff, moist, daiic brown, Sandy, Gravelly CLAY,
with angular volcanic clasts
-Becomes light olive, very moist, more silty
-Discontinuous, out-of-slope slickensided clay
seams
SANTIAGO FORMATION
Very stiff to haird, moist, light olive-gray, Silty
CLAYSTONE
-Blocky, massive /
TRENCH TERMINATED AT 8 FEET
p
Ik
"*
0
l»
P*
lb
0
ft.
0
0
0
'dk.
0
0
'fth
0
Figure A-98, Log of Trench T 43 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
0
0
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. ^T IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
IP
IK
.m PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
CD O SOIL
CUSS
CUSCS)
TRENCH T44
ELEV. (MSL.) 230
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
IN
UJ:
gu^
go
>-b
a
UJC
win
u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
6 -
8
CL
COLLUVIUM
Stiff, moist, dark red-brown, v^ Gravelly
CLAY, widi angular clasts of volcanic rocks
V
-Irregular, downslope-indined clay seam contact
SANTIAGO PEAK VOLCANICS
Very weathered, light reddish-brown, weak
VOLCANIC ROCK
-Very fi^ctured, excavates to a clayey sand /
TRENCH TERMINATED AT 8 FEET
Figure A-99, Log of Trench T 44 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
to
O
o
X
SOIL
CUSS
(USCS)
TRENCH T45
ELEV. (MSL.) 220
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
i-5u.
f few
UJBO
UJ Ui
§U^
go
Q _o |»
- 0 MATERIAL DESCRIPTION
h 2 -
4 -
6 -
8 -
10 -
h 12 -
CL
:L-ML
m m
• * •
SM
COLLUVIUM
Stiff, danq>, dark brown, Sandy CLAY
SANTIAGO FORMATION
Hard, damp, light olive to tan. Clayey SILTSTONE
to Silty CLAYSTONE
-Laminated beds - 1/2-2" thick r
m
Very dense, damp, light tan to reddish-bix)wn,
Silty, medium to coarse SANDSTONE, massive
• ••*
r
r
r-
mr
r I r
TRENCH TERMINATED AT 13 FEET
Figure A-lOO, Log of Trench T 45 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X,.. UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
o _1 o
X
l_
H
SOIL
CLASS
(USCS)
TRENCH T46
ELEV. (MSL.) 215
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
> PENETR RESISl (BLOUS So PENETR RESISl (BLOUS a u
I- 0 MATERLVL DESCRIPTION
- 2 -
- 4 -
^ 6 -
CL TOPSOIL
Stiff, damp, daric brown, Sandy CLAY
SANTIAGO FORMATION
Very stiff, moist, light olive, Silty CLAYSTONE.
very weathered, fractured, with random clay seams
CL
TRENCH TERMINATED AT 7 FEET
Mi
m
m
Figure A-101, Log of Trench T 46 LCG
SAMPLE SYMBOLS D... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
^... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECTNO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
CD O
o X I-H
SOIL
CUSS
(USCS)
TRENCH T47
ELEV. (MSL.) 207
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24" >•
gu^ go
O
UJ
•o u
0
- 0 MATEIUAL DESCRIPTION
- 2 -
- 4 -
- 6 -
COLLUVIUM
Stiff, moist, dark brown, Sandy CLAY
CL
CL SANTIAGO FORMATION
Stiff to very stiff, very moist, light olive, Silty
CLAYSTONE
0
,m
0
lit'
TRENCH TERMINATED AT 7 FEET
0
hi
m
»
0
m
0
0
0
Figure A-102, Log of Trench T 47 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL G. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m
:m PROJECTNO. 06403-12-01
^ ! DEPTH
IN
FEET
SAMPLE
NO.
>-CD O _l O X
I-
SOIL
CLASS
(USCS)
TRENCH T48
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
:UJ' o
^ 3 O
UI; ' UJ^IO
— 1-0 MATERIAL DESCRIPTION
- 2 -
- 4 -
CL
TOPSOIL
Stiff, humid, daiit brown, Sandy CLAY
IV T"
• f
SANTIAGO PEAK VOLQ^CS
Very weathered, firactured, light red-brown, weak
VOLCANIC ROCK
TRENCH TERMINATED AT 5 FEET
Figure A-103, Log of Trench T 48 LCG
mm
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS B. ^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-
a
o X (-H
SOIL
CLASS
(USCS)
TRENCH T49
ELEV. (MSL.) 200
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
;UJ'
hi
0.'
gu:
go
Q
hi .V
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
CL
SM
CL
TOPSOIL
Stiff, damp, dark brown, Sandy CLAY
••-•1
m
SANTIAGO FORMATION
I Dense, damp, light red-brown, Silty, coarse
\ SANDSTONE
1 _ _-Near^-horizOTtal b^d^
Hard, dai^, Ught olive, very Silty CLAYSTONE
-Very fracmred and westered, with calcium
"X carbonate linings y
TRENCH TERMINATED AT 7.5 FEET
ir
m
[
0
tu-
rn
Figure A-104, Log of Trench T 49 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL EI ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE E ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
10
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
0
^ PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• U) O -) SOIL
CLASS
(USCS)
TRENCH T 50
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
CO
CL ^
>-
IK
a
|6-
u
Lo
fan
MATERIAL DESCRIPTION
4 -
- 6 -
- 8
CL TOPSOIL
Stiff, humid to damp, dark brown, Sandy CLAY
CL
SANTIAGO FORMATION
Hard, damp, medium to dark olive. Silty
CLAYSTONE
-Very fractured and weathered, massive
TRENCH TERMINATED AT 8 FEET
Figure A-105, Log of Trench T 50 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL D ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• O SOIL
CUSS
(USCS)
TRENCH T 51
ELEV. (MSL.) 165
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
1^ o H I-
ujHo
UJ ^b cc a
m
I *"
m - 0 MATERIAL DESCRIPTION
2 -
4 -
h 6 -
GC
COLLUVIUM
Stiff, very moist, reddish-brown, Clayey GRAVEL
wldi boulders
-Massive, with mixture of rounded cobbles and
angular tx>ulders of Jsp (IS*-!--)
TRENCH TERMINATED AT 7 FEET
REFUSAL
0
«»
0
w
0
0
0
Figure A-106, Log of Trench T 51 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
0
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-O o _l o
X
SOIL
CLASS
(USCS)
TRENCH T 52
ELEV. (MSL.) 137
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24" ^UJ^ Ul
UJ Q CJ
gc5
o
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
6
8 -
10 -
12 -
h 14 -
a**. -V
[.'M-u
•-^•-.*v^".
•;ov•'*•^:
JP-GM
FILL
Loose, humid to damp, light brown. Gravelly, fine
SAND with some silt
-Becomes loose, damp to moist, light brown, coarse
GRAVEL with oversize boulders > 2' diameter
-Becomes loose, moist, dark brown, Sandy, coarse
GRAVEL, with roots, porous, organic odor, may
be reworked, alluvium
-Becomes very moist to wet
-Caving from 12 feet
TRENCH TERMINATED AT 15 FEET
Figure A-107, Log of Trench T 52 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
- 0
DEPTH
IN
FEET
SAMPLE
NO.
> (3 O _l O X H-H
SOIL
CLASS
(USCS)
TRENCH T 53
ELEV. (MSL.) 145
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
MATERIAL DESCRIPTION
gul
>'b
a
(J
- 2 -
- 4 -
6 -
8
COLLUVIUM
Stiff, moist, dark brown, Gravelly-Sandy CLAY
CL
CL
SANTIAGO FORMATION
Hard, moist, light olive-brown, Gravelly-Sandy
CLAYSTONE, with angular clasts of volcanic
rocks
TRENCH TERMINATED AT 8 FEET
Figure A-108, Log of Trench T 53 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE i*^
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O
O X
I-
H
SOIL
CUSS
(USCS)
TRENCH T54
ELEV. (MSL.) 240
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
• UJ^
ujt^jo
hiiiito
>-
gu.
a: a •o u
- 0 MATERL\L DESCRIPTION
- 2 -
- 4 -
6 -
8
SC
TOPSOEL
Loose, humid, dark brown. Clayey SAND, some
silt
SANTIAGO PEAK VOLCANICS
Very weathered and altered, teddish-brown, weak
VOLCANIC ROCK
-Very fractured and hydrothennally altered,
excavates to a graveUy, cl^ey sand
TRENCH TERMINATED AT 8 FEET
Figure A-109, Log of Trench T 54 LCG
SAMPLE SYMBOLS U ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
@ ... DISTURBED OR BAG SAMPLE E. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
« NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O _1
o
X
SOIL
CUSS
(USCS)
TRENCH T55
ELEV. (MSL.) 150
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
iU-CO,.*
a O
m>
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
CL
SM
ALLUVIUM
Stiff, dan^, dark brown, very Sandy CLAY
-Irregular "v-shape" contact
SANTIAGO FORMATION
Dense, damp, light brown-tan, Silty, medium
SANDSTONE, massive
TRENCH TERMINATED AT 5 FEET
Figure A-110, Log of Trench T 55 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL D. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
0
^ PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O -1
o
X
SOIL
CLASS
(USCS)
TRENCH T56
ELEV. (MSL.) 185
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
ujhJp
UJ
ICO' UJ 0£
>6
Q
UJ
u
MATERIAL DESCWTION
A
A
2
4
- 6
CL TOPSODL
Stiff, damp, dark brown, Sandy CLAY
CL
SANTIAGO FORMATION
Very stiff to hard, moist, light olive, Silty
CLAYSTONE
-Very weathered and fractured
TRENCH TERMINATED AT 6 FEET
Figure A-111, Log of Trench T 56 LCG
SAMPLE SYMBOLS n... SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E... STANDARD PENETRATION TEST I... DRIVE SAMPLE (UNDISTURBED)
KI ... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
ce
>•
UJ CD H-O <C .J 3 o a X z 1-H a -I a: CD
SOIL
CLASS
(USCS)
TRENCH T 57
ELEV. (MSL.) 180
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
;tU' U,
UJ ^9
>
gu^
>-b
a
hiiS
u
IP'
lli
- 0
MATEIUAL DESCRIPTION
- 2 -
- 4 -
CL
SM
TOPSOIL
Stiff, damp, dark brown, Sandy CLAY
SANTIAGO FORMATION
Dense, damp, light olive to tan, Silty. fine
SANDSTONE, with some clay
TRENCH TERMINATED AT 5 FEET
W
Figure A-112, Log of Trench T 57 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL B. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
0
0
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
HO.
>-CD O -I
o
X
SOIL
CUSS
(USCS)
TRENCH T58
ELEV. (MSL.) 170
EQUIPMENT
DATE COMPLETED 11/8/99
TRACKHOE JD 555 24"
^U.
UJS
go
>-b
a u
h 0
2
4
6
MATERL\L DESCRIPTION
CL TOPSOIL
Stiff, humid to danm, daiic gray-brown, Sandy
CLAY
m m
m
SM
SANTIAGO FORMATION
Dense, damp, light reddish-brown, Silty, coarse
SANDSTONE, massive
TRENCH TERMINATED AT 6 FEET
Figure A-113, Log of Trench T 58 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O .J
a
X h-H
SOIL
CLASS
CUSCS)
TRENCH T 59
ELEV. (MSL.) 238
EQUIPMENT
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24"
Or? •
<c£\
uj{)ja
a
go
u
- 0
MATERIAL DESCRIPTION I*
Ihi.
h 2 -
4 -
6 -
8 -
10 -
12 -
14 -
- 16
7-
AA
SC
SC
•2/ m •m m SM
FILL
Loose, dry to himiid, brown. Clayey, Gravelly
SAND, with oversize debris, trash, wood, silt
TERRACE DEPOSIT
Medium dense, reddish-brown. Clayey, fine SAND
-Massive, with lenses of clay and sand, oxide and
carbonate fracture coatings, some porosity,
root-voids
-Irregular depositional contact
SANTIAGO FORMATION
Dense, damp, light orange to olive, Silty, fine
SANDSTONE, with some clay
0
r
0
r
TRENCH TERMINATED AT 16 FEET
L
Figure A-114, Log of Trench T 59 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT WARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
0
- PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
HO.
CD a _i o X H H
SOIL
CLASS
(USCS)
TRENCH T 60
ELEV. (MSL.) 190
EQUIPMENT
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24"
U.
»^
hi uiJiiaa a.
«u^
go
Q u
- 0 MATERL\L DESCRIPTION
- 2 -
- 4 -
6
8
h 10 H
12
14
16
18
•i-.-r
{}
]•- I
1-1-1. [i-
f !.
ALLUVIUM
Loose, humid, dark gn^-brown, Silty, fine SAND
-Very porous, with root-voids, roodets
SM
-Becomes loose to medium dense, light brown-tan,
Silty, fine SAND
-No root-void, rootlets, becomes cleaner with
depth
-Becomes very moist
TRENCH TERMINATED AT 18 FEET
(CAVING)
Figure A-115, Log of Trench T 60 LCG
m SAMPLESYMBOLS °- ^^''^^"^ UNSUCCESSFUL
^ ... DISTURBED OR SAG SAMPLE
c.
B.
. STANDARD PENETRATION
. CHUNK SAMPLE
TEST DRIVE SAMPLE (UNDISTURBED)
X ... UATER TABLE OR SEEPAGE
mm NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-C9 O -1
o
SOIL
CLASS
(USCS)
TRENCH T61
ELEV. (MSL.) 230
EQUIPMENT ______
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24" UJ
IN c^^
cflR UJ=;
a
UJ^
u
- 0 MATEIUAL DESCRIPTION
h 2 H
4
6
8
1 SC
m
SM
COLLUVIUM
Medium dense, himud, dark brown. Clayey, fine
SAND
-Porous, with roots, burrows
-Irregular, out-of-slope iiclined contact
SANTIAGO FORMATION
Very dense, damp, light brown to tan, Silty, fine
SANDSTONE. Massive to faintly banded
-Near-horizontal bedding
TRENCH TERMINATED AT 8 FEET
Figure A-116, Log of Trench T 61 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE CHUNK SAMPLE UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES. 0
- PROJECT NO. 06403-12-01
DEPTH
IN
FEET
- 0
SAMPLE
NO.
SOIL
CUSS
(USCS)
TRENCH T 62
ELEV. (MSL.) 120
EQUIPMENT
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24"
MATERIAL DESCRIPTION
hi = !3: co< UJ: Ui^CQ >•
§u^ go
ujo
u
- 2 -
- 4 -
6
8
10
ALLUVIUM
Stiff, moist, dark brown, Sandy CLAY
-Porous, with rootlets, root-voids, burrows
T62-1
T62-2
T62-3
T62^
CL 103.7 9.3
SC
TERRACE DEPOSIT
Medimn dense, damp to moist, reddish-brown,
Cl^ey, medium SAND, some coarse sand
-Massive, with minor root-voids
106.9 9.6
TRENCH TERMINATED AT 10 FEET
m
m
Figure A-117, Log of Trench T 62 LOG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL B... STANDARD PENETRATION TEST . DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR SAG SAMPLE B... CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >•
a a _i a
X
I-H .J
SOIL
CLASS
(USCS)
TRENCH T63
ELEV. (MSL.) 100
EQUIPMENT
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24"
;UJ'
y. o
H
ujt;jo
uj^m
CO.*
UJ
a
a - 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8 -
10 -
12 -
h 14 -
- 16 -
- 18 -
CL-SC
CL
ALLUVIUM
Stiff, humid, daiic brown, Sandy CLAY to very
Qayey SAND
-Porous, with roodets and rOot-voids, burrows
Stiff, moist, light brown, very Sandy CLAY
-Massive, with scattered charcoal fiagments and
root-voids
-Becomes Very stiff, very moist, light olive, very
SUty CLAY, with some fine sand
TRENCH TERMINATED AT 18.5 FEET
Figure A-118, Log of Trench T 63 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL El ... STANDARD PENETRATION TEST I... DRIVE SAMPLE (UNDISTURBED)
... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O _l
o
X
H
SOIL
CUSS
(USCS)
TRENCH T 64
ELEV. (MSL.) 125
EQUIPMENT
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24"
iij"^
f2§
UJ
>
§u^
>-b
a
hi
L)
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
8 -
10 -
12 -
14 -
16
ALLUVIUM
Stiff, humid, dark gr^-brown, Sandy CLAY
-Massive, porous, witti rootlets, root-voids and
burrows
CL
-Becomes moist, brown
SM
CL
y.
SC
TERRACE DEPOSrr
Medium dense, damp, light reddish-brown, Silty,
inediumjo coarse SANDj^ wifli so
Very stiff, moist, olive-brown, Sandy CLAY,
I^Mtic, wUh sliclffiiaided
Mediimi dense, moist, light brown. Clayey, fine to
mediiun SAND
TRENCH TERMINATED AT 16 FEET
Figure A-119, Log of Trench T 64 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECrr NO. 06403-12-01
TRENCH T65
ELEV. (MSL.) 117
EQUIPMENT
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24"
Hyt-
gLL
go
a MATEIUAL DESCRIPTION
COLLUVIUM
Stiff, humid to moist, dark gray-brown, Sandy
CLAY
TERRACE DEPOSIT
Medium dense, moist, reddish-brown, very Clayey,
medium to coarse SAND
-Remolded clay seam, 1/2" thick, N20W, 25SW
-Massive, with scattered pebbles and charcoal
fragments
-Remolded clay seam, 1/2" to 1" thick, N30W,
15SW; possible sheared contact
SANTIAGO FORMATION
Hard, damp, light olive, Clayey SILTSTONE
-Massive, blocky. low-angle beds
TRENCH TERMINATED AT 14 FEET
m
r
r
L
[
L
Figure A-120, Log of Trench T 65 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
... DISTURBED OR BAG SAMPLE & ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O _l
o
X
H
SOIL
CLASS
(USCS)
TRENCH T66
ELEV. (MSL.)
EQUIPMENT
93 DATE COMPLETED 11/10/99
TRACKHOE JD 555 24"
gu:
go >-b
a u
- 0 MATERIAL DESCRIPTION
- 2 '
- 4 -
- 6 -
- 8 -
- 10
- 12
- 14
m
0
0
CL
SC
CL
ALLUVIUM
Stiff to very stiff, damp to moist, dark
gray-brown, Sandy CLAY
-Massive, porous, with root-voids, burrows and
scattered charcoal fragments
-Becomes stiff, very moist
TERRACE DEPOSIT
Mediimi dense, moist, light reddish-brown, Qayey,
medium SAND, with some silt, massive
SANTIAGO FORMATION
\ Hard, moist, light olive, very Silty CLAYSTONE
TRENCH TERMINATED AT 15 FEET
Figure A-121, Log of Trench T 66 LCG
SAMPLESYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLESYMBOLS
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T67
95 ELEV. (MSL.)
EQtnPMENT
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24" >!
o
MATEIUAL DESCRIPTION
•r
UK
m
COLLUVIUM
Stiff to very stiff, humid, dark gray-brown, Sandy
CLAY, massive, porous, with rootlets, root-voids
and burrows
-Irregular contact
TERRACE DEPOSIT
Medium dense, moist, light brown to
reddish-brown. Silty, fine to medium SAND, some
clay, massive
103.4 11.4
Medium dense, moist, light reddish-brown. Clayey,
medium SAND
m
SANTIAGO FORMATION
Very stiff, very moist, light olive to gray, Silty
CLAYSTONE. very wemhered, with some sand /
TRENCH TERMINATED AT 16 FEET
Figure A-122, Log of Trench T 67 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
0
Ik
0
0
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECrr NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>
o .J a
X
SOIL
CLASS
(USCS)
TRENCH T 68
ELEV. (MSL.) 150
EQUIPMENT
DATE COMPLETED 11/10/99
TRACKHOE JD 555 24"
H
;UJ'
CJ,
ujgo go
a
/A
hl*S
si
u
- 0 MATERL\L DESCRIPTION
- 2 -
- 4 -
CL TOPSOIL
Stiff, humid, dark brown, Sandy CLAY
CL
SM
SANTIAGO FORMATION
Stiff, moist, olive-brown, Silty CLAYSTONE
-Very fractured and weathned
-Honzomal b«lding^ contact
Very dense, danq>, light olive to brown. Silty, fine
SANDSTONE, some clay, blocky
TRENCH TERMINATED AT 8 FEET
Figure A-123, Log of Trench T 68 LCG
SAMPLESYMBOLS °- SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST 1... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PRQJECrr NO. 06403-12-01
- 0
DEPTH
IN
FEET
SAMPLE
HO.
>• (3 O _l O X
h-H -J
SOIL
CUSS
(USCS)
TRENCH T69
ELEV. (MSL.) 120
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
MATERIAL DESCRIPTION
LU
IN
hist >• - 2 -
- 4 -
6
8
10
SM
m m SM
ML
COLLUVIUM
Loose, damp to moist, dark brown, Silty, fine
SAND
-Porous, rootlets and root-voids, and some clay
-Very irregular contact
SANTIAGO FORMATION
Dense, very moist, light reddish-brown, Silty,
coarse SANDSTONE
-Weathered, fractured
Hard, moist, light olive, Qayey SILTSfONE
-Blocky
TRENCH TERMINATED AT 11 FEET
Figure A-124, Log of Trench T 69 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ...
@ ... DISTURBED OR BAG SAMPLE B ...
STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O -J
s
I-
SOIL
CLASS
(USCS)
TRENCH T70
ELEV. (MSL.) 180
EQinPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
5H .
go
a u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8
0
SC FILL
Loose, dry. darit brown, Qayey, Gravelly SAND
CL
COLLUVIUM
Stiff, humid, red-brown, very Sandy CLAY
^L-CL SANTIAGO FORMATION
Hard, damp, light olive-brown, very Clayey
•X SILTSTONE
TRENCH TERMINATED AT 8 FEET
Figure A-125, Log of Trench T 70 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE ¥••• UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• O SOIL
CUSS
(USCS)
TRENCH T71
ELEV. (MSL.) 105
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
^hi^
CO 3
^3° >-b
a (J
- 0 MATEIUAL DESCRIPTION
,-1 - 2 -
- 4 -
- 6
CL
CL
TOPSOIL
Stiff, humid, dark brown, Silty CLAY, with some
sand
SANTIAGO FORMATION
Hard, moist, olive-gray. Silty CLAYSTONE
-Massive, blocky
TRENC:H TERMINATED AT 6 FEET
13
m
If
w
Figure A-126, Log of Trench T 71 LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS . STANDARD PENETRATION TEST
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m
^ PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O -I
o
X H-H
SOIL
CLASS
CUSCS)
TRENCH T72
ELEV. (MSL.) 120
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
UJ H; co' UJ^
cn, ih.
iu UJ.
>'b
a:
a
UJ5
3w
CO UJ
I- 0
2
4
6
8
h 10
MATERIAL DESCRIPTION
T72-1
CL
SC
TOPSOIL
\ Stiff, humid, daric gray-brown, Sandy CLAY
CL-CH
TERRACE DEPOSrr
Medium dense, moist, reddish-brown, Clay^, fine
to medium SAND, with pebble gravel along SE
dipping ccmtact :
SANTIAGO FORMATION
Very stiff, moist, light olive with white mottling.
SUty (XAYSTONE
-Remolded clay seam N60W. 35SW, - 1/4-1/2*
thick, with gypsimi linings
-Very weathered and fractured, massive, with
abundant calcium sulfate
/
TRENCH TERMINATED AT 10 FEET
Figure A-127, Log of Trench T 72 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL . STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOWN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS HOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
HO.
Q£
> Ui a 1-o <c _i 3 SOIL "un nu Q Z cuss
t—
H 3
a
(USCS)
or cs
TRENCH T73
ELEV. (MSL.) 110
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
nyi-
SUJ; a: o CJ
IP
- 0 MATERLVL DESCRIPTION
- 2 -
- 4 -
6 -
8
COLLUVIUM
Stiff, moist, dark brown. Sandy CLAY
-Massive with Imm - 2mm ^ts of gypsum (?)
CL
VIL-CL SANTIAGO FORMATION
Hard, moist, light olive, very Qayey SILTSTONE
-Massive, fractured
TRENCH TERMINATED AT 8 FEET
m
m
Figure A-128, Log of Trench T 73
, , , i-.,.,., 1 L..„. lii
LCG
SAMPLE SYMBOLS ° - ^''^^"'^ UNSUCCESSFUL
m ... DISTURBED OR BAG SAMPLE
c.
B.
W
. STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X... UATER TABLE OR SEEPAGE |"
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
« PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> tn o SOIL
CLASS
(USCS)
TRENCH T 74
ELEV. (MSL.)
EQUIPMENT
85 DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
iUI'^
I U| O
ft ICw
>'b
cn
a
o
- 0 MATERIAL DESCRIPTION
0-'
- 2 -
- 4 -
- 6 -
- 8 -
10
12
- 14
COLLUVIUM
Stiff, moist, dark gray-brown. Sandy CLAY
CL
m
SC
m
SANTIAGO FORMATION
Medium dense, damp to moist, light brown to
olive. Clayey, medium SANDSTONE, very
weathered, massive
-Becomes less weathered, dense
m
0
TRENCH TERMINATED AT 14 FEET
Figure A-129, Log of Trench T 74 LCG
0 SAMPLESYMBOLS °- '"^''''^ UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST 1... DRIVE SAMPLE (UNDISTURBED)
. CHUN< SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T75
98 ELEV. (MSL.)
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
ujrjo
UJ
§U^
>-b
a
g6
CJ
MATERIAL DESCRIPTION
ALLUVIUM
Stiff, moist, dark brown, Sandy CLAY
-Becomes more moist
-Irregular transitional contact V
Soft to stiff, very moist, olive-brown, Silty CLAY
-Very fractured, weathered, mixed texture, with
numerous clay seams (possible weathered Santiago)
SANTIAGO FORMATION
Very stiff to hard, moist, light olive, Silty
CLAYSTONE
-Very fractured, bloclqf
TRENCH TERMINATED AT 17 FEET fei
W
0
0
0
0
Ik.
0
0
w
0
0
0
Figure A-130, Log of Trench T 75 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C. . STANDARD PENETRATION TEST • .. . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
B..
. STANDARD PENETRATION TEST SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B.. . CHUNK SAMPLE X .. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LCOTION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
- PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CUSS
(USCS)
TRENCH T76
ELEV. (MSL.) 110
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
SUJ^
CO
a.
gu^ go
a
J3g
- 0
MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8
CL TOPSOIL
Stiff, humid, dark brown, Sandy CLAY
CL
SANTIAGO FORMATION
Hard, moist, Ught olive mottled with white, Sil^
CLAYSTONE, widi some sand, weadiered widi
calcium sulfate (gypsum) mdttling, massive
-Clay seam 1/8" thick, low angle and discontinuous
TRENCH TERMINATED AT 8 FEET
Figure A-131, Log of Trench T 76 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
<m SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
B. ^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUH HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>• CD O
H
SOIL
CLASS
(USCS)
TRENCH T77
ELEV. (MSL.) 100
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
H
;tU'
en,.'
UJ,
a
hiiS
a
- 0 MATERL\L DESCRIPTION jp
- 2 -
- 4 -
6 -
8 -
- 10
COLLUVIUM
Stiff, moist, dark gray-brown, Sandy CLAY;
massive, porous, with root-voids, burrows
CL
-Becomes more sandy, moist
] AL-MH SANTIAGO FORMATION
Very stiff to hard, moist, light olive, very Clayey
SILTSTONE
TRENCH TERMINATED AT 10 FEET
I
Ik
L
0
I
Figure A-132, Log of Trench T 77 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
C ... STANDARD PENETRATION TEST
B ... CHUNK SAMPLE
• ... DRIVE SAMPLE (UNDISTURBED)
X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m
^ PROJECrr NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O _l O X
SOIL
CLASS
(USCS)
TRENCH T78
ELEV. (MSL.) 180
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24" hi-st
go
u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6
- 8
<- 10
u L
'I \ "
- 14
- 16
r •|
'A
I •\ A SM
;i-,-r SM
ALLUVIUM
Loose, humid, dark brown, SUty, fine SAND
-Very porous, with rootiets, root-voids, burrows
throughout
-Contains trace clay, lighter brown
TERRACE DEPOSIT
Medium dense, moist, light brown, Silty, fine
SAND
-Minor root-voids
TRENCH TERMINATED AT 16 FEET
Figure A-133, Log of Tre^ch T 78 LCG
—•
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL c. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
Ml
SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T79
ELEV. (MSL.) 150
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
;UJ'
cn OS
§U^
go
^b a: a u
m
m
m
0
MATERIAL DESCRIPTION
ALLUVIUM
Stiff to very stiff, humid to damp, reddish-brown,
very Sandy CLAY
-Massive, porous, with rool^voids and burrows
Medium dense, damp, brown, Silty, fine SAND
-Porous, with root-voids, burrows
TERRACE DEPOSIT
Medium dense, moist, reddish-brown, very Clayey
SAND to Sandy CLAY
-Massive, with minor porosity and slight coatings
of calcium carbonate/sulfate
TRENCH TERMINATED AT 18 FEET
[
[
Figure A-134, Log of Treiich T 79 1 1 1 lb
LCG
SAMPLE SYMBOLS ° - ^"'^"^ UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
D.
B.
, STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE ^
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CLASS
(USCS)
TRENCH T 80
ELEV. (MSL.) 158
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
a
g2§ UJ to' iUJ: UJgtD
gci
^b
cn
a
hi
u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
6 -
8 -
10
- 12
- 14 -
- 16 -
- 18
ALLUVIUM
Stiff, humid to damp, dark brown, Sandy CLAY
CL
-Becomes soft to stiff, moist, reddish-brown, very
Sandy CLAY
-Porous, with root-voids, scattered charcoal
fragments
-Becomes more sandy, less porous
TRENCH TERMINATED AT 18 FEET
Figure A-135, Log of Trench T 80 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O _1
o
X
SOIL
CUSS
(USCS)
TRENCH T 81
ELEV. (MSL.) 190
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
1^
;ui'
y.
ujitita
§u^
>b
cn
a
hiiS
u
- 0 MATERIAL DESCRIPTION
2 -
4 -
h 6 -
SC TOPSOIL
\ Loose, dry, dark brown, very Clayey SAND
ML
SANTIAGO FORMATION
Hard, damp, very Ught olive to brown. Clayey
SILTSTONE, with some sand, massive to near
horizontal beds
/
TRENCH TERMINATED AT 7 FEET
0
0
m
0
0
Figure A-136, Log of Trench T 81 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
^ PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O _l o X h-H
SOIL
CUSS
(USCS)
TRENCH T 82
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/11/99
TRACKHOE JD 555 24"
Suj^ Or? *
Hyi-
<c£s
UJ
Ui
ujf;
cn a u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8 -
- 10 -
- 12 -
- 14 -
ALLUVIUM
Stiff, damp, daric brown, very Sandy CLAY
-Very porous, with root-voids, burrows
CL
VI-SM
yy\
SC
TERRACE DEPOSIT
Medium d^e, moist, light brown, Silty, coarse
_%VND, with OTme fine GRAVEL
Medium dense, moist, reddish-brown. Clayey, fine
to medium SAND, massive
TRENCH TERMINATED AT 15 FEET
Figure A-137, Log of Trench T 82 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST I... DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >•
a o _i o
X
SOIL
CLASS
(USCS)
TRENCH T83
ELEV. (MSL.) 130
EQUIPMENT
DATE COMPLETED 11/12/99
TRACKHOE JD 555 24"
-UJ' o
H. .
hi^a iSui
a.
gu^ go
>-b
a
- 0 MATERIAL DESCRIPTION
2 -
4 -
6 -
8 -
10
CL
CL
SM
COLLUVIUM
Very stiff, moist, dark olive to brown, very Sandy
CLAY
-Massive, porous, with root-voids, rootiets
-Transitional, near-horizontal
TERRACE DEPOSIT (?)
Stiff, very moist, light olive, Silty CLAY
-Veiy weadiered, with disconlinuous clay scaim
Medium dense, damp, light reddish-brown, Silty,
medium SAND, with some clay /
TRENCH TERMINATED AT 10 FEET
Figure A-138, Log of Trench T 83 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS HOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>•
-1 o X I-H
SOIL
CUSS
(USCS)
TRENCH T84
ELEV. (MSL.) 170
EQUIPMENT
DATE COMPLETED 11/12/99
TRACKHOE JD 555 24"
UJ^O
UJ
CO'
hl'st
§u^
go
cn a
.V
UJ
MATERIAL DESCRIPTION
- 2 -
- 4 -
6 -
8
COLLUVIUM
Stiff, damp to moist, darit brown, Sandy CLAY
CL
CL
SANTIAGO FORMATION
Stiff, very moist, olive-brown, Silty CLAYSTONE,
very weathered, fractured, widi discontinuous
slickensided clay seams.
0
TRENCH TERMINATED AT 8 FEET
Figure A-139, Log of Trench T 84 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL C ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> CD O
o X »-H
SOIL
CUSS
(USCS)
TRENCH T 85
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
K«3
Ujgg a
hi
u
m
IK
*
In
m
to
- 0 MATERL\L DESCRIPTION
2 -
4 -
6 -
8 -
T85-1
T85-2
- 10
COLLUVIUM
Stiff, moist, dark olive-brown, Sandy CLAY
CL
-Irregular transition inclined southeast
SM
SANTIAGO FORMATION
Medium dense, moist, light brown, Silty, very fine
SANDSTONE, with trace clay, massive
-Becomes dense, blocky, more sandy
TRENCH TERMINATED AT 10 FEET
Figure A-140 , Log of Trench T 85
0
LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
r
li
0
ft
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
41 PROJECT NO. 06403-12-01
TRENCH T86
ELEV. (MSL.) 143
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
Hyi-gu^
UJ Q
>'*^
Q
UJ-$
u
MATERIAL DESCRIPTION
COLLimUM
Stiff, danq>, dark gray-brown. Sandy CLAY,
massive, porous, with rootiets and root-voids and
burrows
TERRACE DEPOSIT (?)
Stiff, very moist, reddish-brown, very Qayey, fine
SAND, massive, with scattered fine gravel
-Transitional, near-horizontal contact
SANTIAGO FORMATION
Very stiff, very moist, olive-brown, Silty
CLAYSTONE, very weadiered, fi^tured, with
discontinuous clay seams
-Becomes olive-gray
TRENCH TERMINATED AT 16 FEET
104.7
101.4
20.6
23.3
0
Figure A-141, Log of Trench T 86 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE I ... UATER TABLE OR SEEPAGE
^ I1;U'-??.r,^^..?d^^""*^^ CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O _l O X
SOIL
CLASS
(USCS)
TRENCH T87
ELEV. (MSL.) 138
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
l-?U_
go
>-b
a u
MATERIAL DESCRIPTION
- 2 -
- 4 -
6 -
8 -
10 -
12 -
h 14
- 16 H
CL
T87-1
T87-2
\y
SM
COLLUVIUM
Stiff, damp, daric gr^-brown, Sandy CLAY
-Massive, porous, with rootlets, root-voids and
burrows
-Becomes moist to very moist
TERRACE DEPOSIT
Medium dense, damp, light reddish-brown, Silty,
fine SAND, with some clay
SC-CL
Medium dense, damp, reddish-brown. Clayey, fine
SAND to very Sandy CLAY, massive, bloclqf, wiUi
scitttered fine gravel and grit, some porosity, with
scattered rootiets and root-voids
-Scattered small firagments of charcoal
TRENCH TERMINATED AT 17 FEET
116.3 15.4
m
to
0
Figure A-142; Log of Trench T 87 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST 1 ... DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
B... ^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE I ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECTNO. 06403-12-01
TRENCH T88
ELEV. (MSL.) 145
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
IUJ'
y.
1^ UJ
uj^ta
«U.
go
>-b
O u
MATERIAL DESCRIPTION
COLLUVIUM
Stiff, moist, dark gray-brown, Sandy CLAY
-Massive, porous, with rootiets, root-voids and
burrows
TERRACE DEPOSIT
Soft to stiff, very moist to wet, Ught olive-brown,
SUty CLAY, with some reddish-brown sand lenses,
and discontinuous clay seams, almost plastic
SANTIAGO FORMATION
Very stiff, very moist, light oUve-gray, Silty
CLAYSTONE
-Very weathered, with discontinuous clay seams,
very fractured
TRENCH TERMINATED AT 14 FEET
Figure A-143, Log of Trench T 88 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS MOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AMD TIMES.
PROJECT NO. 064Q3-12-Q1
DEPTH
IN
FEET
- 0
SAMPLE
NO.
> CD O _1
o X h-H
SOIL
CUSS
(USCS)
TRENCH T89
ELEV. (MSL.) 123
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
MATERIAL DESCRIPTION
;UJ' O
«««
UjglO
5-
a: a U
h 2 -
4 -
6 -
8 -
CL
CL
COLLUVIUM
Stiff, damp to moist, dark gray-brown, Sandy
CLAY
SANTIAGO FORMATION
Stiff, very moist, light olive-brown, Sandy
CLAYSTONE, very weadiered, fractured
-Becomes hard, moist, olive, Silty CLAYSTONE,
firactured, blocky, massive
m
TRENCH TERMINATED AT 9 FEET 0
tm
L
I
I.
L
Figure A-144, Log of Trench T 89 km
LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
^ PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
O X
SOIL
CUSS
(USCS)
TRENCH T90
ELEV. (MSL.) 230
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
hi}:Ao
CP,."
UJ.
Q
3
i- 0
2
4
6
8
MATERIAL DESCRIPTION
CL TOPSOIL
Stiff, humid, dark gray-brown, Sandy CLAY
CL
SM
SANTIAGO FORMATION
Hard, damp, olive, Silty CLAYSTONE; very
fr^rtured and weathered
-Near-horizontal bedding - contact
Very dense, damp, li^t olive to brown, Silty,
coarse SANDSTONE, widi trace clay, blocl^
0
M
0
0
0
TRENCH TERMINATED AT 8 FEET
0 Figure A-145, Log of Trench T 90 LCG
0
SAMPLESYMBOLS °- SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
mm NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LXATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >•
at o _i o
X
SOIL
CLASS
(USCS)
TRENCH T91
ELEV. (MSL.) 130
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
5W .
UJ
CO' , hi^ OS"
a
or x:; •O
u • " \
m
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
CL
COLLUVIUM
Very stiff, damp to moist, dark gray-brown, Sandy
CLAY, porous, with roodets, root-voids, burrows
CL
V
TERRACE DEPOSIT
Very stiff to hard, moist, reddish-brown, very
Sandy CLAY, massive, blocky, with sonw porosity,
with roodets, root-voids /
TRENCH TERMINATED AT 7 FEET
•r
it
0
m
Figure A-146, Log of Trench T 91 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC SORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-CD O
X 1-H
SOIL
CUSS
(USCS)
TRENCH T 92
ELEV. (MSL.) 225 DATE COMPLETED 11/15/99
EQUIPMENT TRACKHOE JD 555 24"
o
H u.
Q^7:^<J> 1-^
UJ UJ^dO
>-
>'b cn
hi. a'
3t_
CO UJ
•o u
- 0
MATERIAL DESCRIPTION
- 2 -
- 4 -
6
8
10
CL TOPSOIL
Stiff, hmnid, daric gray-brown, Sandy CLAY
m m m m m m m m
•mi
SM
SANTIAGO FORMATION
Dense, damp, light tan, Sil^, fine to medium
SANDSTONE, massive, blocky
-Near-horizontal be(&lmg
0'
m
TRENCH TERMINATED AT 10 FEET
m Figure A-147, Log of Trench T 92 LCG
0
m SAMPLE SYMBOLS ° - ^^^'""^ UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
^ NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T93
ELEV. (MSL.) 195
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
(0^
a-UJ
gti
a
MATERIAL DESCRIPTION
TOPSOIL
Stiff, hiunid to dan^, dark brown, Sandy CLAY
SANTIAGO FORMATION
Firm to hard, damp, olive, very Silty,
CLAYSTONE
-Very fi?ctur^,_wth_c^dum sulf^linmgs^
Dense, dan^, light brown to olive, Sil^, medium
SANDSTONE, with some clay, massive, blocky y
TRENCH TERMINATED AT 7 FEET
Figure A-148, Log of Trench T 93 LCG
SAMPLESYMBOLS ° - '^'^'"'^ ""SUCCESSFUL
@ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST B .
. CHUNK SAMPLE X .
. DRIVE SAMPLE (UNDISTURBED) ^
. UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
^ PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CUSS
(USCS)
TRENCH T94
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24" ages
§u. go
a
- 0 MATERL\L DESCRIPTION
- 2 -
- 4 -
- 6
8
- 10 H
- 12
14
CL
SM
CL
ALLUVIUM
Stiff, moist, dark brown, Sandy CLAY
-Porous, with roodets, root-voids and burrows
TERRACE DEPOSIT
Medium dense, damp, light yellow-brown to
orange,, Silty, fine SAND, some porosity,
root-voids
Medium dense, moist, reddish-brown, very Sandy
CLAY, massive
TRENCH TERMINATED AT 14 FEET
Figure A-149, Log of Trench T 94 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T 95
ELEV. (MSL.) 193
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
o
ujj^o
M'
cn,
>-b cn
a
MATERIAL DESCJRIPTION
ALLUVIUM
Soft to stiff, very moist, daric brown, Sandy
CLAY, massive, porous, with root-voids, rootlets
-Very irregular, sharp cont^
SANTIAGO FORMATION
Stiff, very moist, olive motded with white and
brown, Sandy CLAYSTONE
-Very weathered, with slickensided, remolded clay
seams throughout
TRENCH TERMINATED AT 14 FEET
Figure A-150, Log of Trench T 95 LCG
SAMPLESYMBOLS °- SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST 1 .
. CHUNK SAMPLE X .
. DRIVE SAMPLE (UNDISTURBED) 0
. UATER TABLE OR SEEPAGE *fc
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m PROJECTNO. 06403-12-01
TRENCH T96
ELEV. (MSL.) 200
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
SSUJ*^ Ori •
i-5u.
UJ
go
>-b
a
MATERIAL DESCRIPTION
ALLUVIUM
Soft to stiff, very moist, daric brown, very Sandy
CLAY
SANTIAGO FORMATION
Dense, damp, light olive-gray, very Silty, fine
SANDSTONE, with some clay
TRENCH TERMINATED AT 12 FEET
0 Figure A-15] L, Log of Trench T 96 LCG
m
M
^.«™r „,r,,««T o C". SAMPLING UNSUCCESSFUL
SAMPLE SYMBOLS ^
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUH HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
h 0
2
4
6 H
8
SAMPLE
NO.
>-
o _l o
X
M
SOIL
CUSS
(USCS)
CL
CL
TRENCH T 97
ELEV. (MSL.) 210
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
MATERL\L DESCRIPTION
TOPSOIL
\ Stiff, humid, dark brown, Sandy CLAY
SANTIAGO FORMATION
Hard, damp, olive-gray, very Silty CLAYSTONE,
massive to horizontal beds, yery ft^ctured and
weathered
/
UJ' z o
UJ to tn
toH LU=;
-Becomes very hard, moist, less firactured and
weathered
TRENCH TERMINATED AT 8 FEET
a
is
Figure A-152, Log of Trehch T 97 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
SOIL
CUSS
(USCS)
TRENCH T98
ELEV. (MSL.) 210
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24" UJ >•
UJ^
u
MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6
- 8
- 10
COLLUVIUM
Soft to sdff, very moist, dark brown, Sandy CLAY
-Porous, with rootiets, root-voids and burrows
CL
\
-Irregular transitional contact, with fiagmems of
Santiago formation
SM SANTIAGO FORMATION
Dense, damp, light brown to olive, Silty, fine
SANDSTONE, massive, blocky, widi trace clay
-Near-horizontal bedding
0
0
TRENCH TERMINATED AT 10 FEET
Figure A-153, Log of Trench T 98 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE ¥••• UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
0
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> a _i a
X
SOIL
CUSS
(USCS)
TRENCH T 99
ELEV. (MSL.) 175
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
5H'
tn
ijjUJ
a.
UJ
go
Q
UJ
IK'
- 0
2 -
h 4 -
6 -
8
MATERIAL DESCRIPTION
COLLUVIUM
Stiff to soft, moist, dark gray-brown. Sandy CLAY
-Massive, porous, with rootiets, root-voids and
burrows
-Irregular contact inclined SW
SANTIAGO FORMATION
Very dense, damp, light tan to orange, Silty, fine
SAl^TDSTONE, massive to near-horizontal beds
TRENCH TERMINATED AT 8 FEET
Figure A-154, Log of Trench T 99 LCG
SAMPLESYMBOLS ° - ""^'"''^ UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
^ PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >•
to o
o
X
SOIL
CUSS
(USCS)
TRENCH TlOO
ELEV. (MSL.) 175
EQinPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
suj-^
gu:
go
a:"
Q u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -
- 6 -
- 8 -
- 10 -
- 12
COLLUVIUM
Soft to stiff, moist, dark brown, Sandy CLAY
-Porous, with roodets, root-voids
CL
SC TERRACE DEPOSIT
Medium dense, moist, reddish-brown. Clayey, fine
to medium SAND, with some silt, grit
CL Very stiff to hard, very moist, olive-brown, very
Sandy CLAY
TRENCH TERMINATED AT 12 FEET
Figure A-155, Log of Trench TlOO LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
to o
o X t-H
SOIL
CUSS
(USCS)
TRENCH TlOl
ELEV. (MSL.) 197
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24" UJ ID
§U^
a CJ
0
- 0 MATERL\L DESCRIPTION
- 2 -
- 4 -
- 6 -
CL TOPSOIL
\ Stiff, humid, dark gray-brown, Sandy CLAY
14L-MH
SANTIAGO FORMATION
Hard, damp, light olive, very Qayey SILTSTONE
-Very weathered and fractured, with some
sandstone lenses
-Becomes very hard, dry, light olive, cemented,
SUty SANDSTONE
-Concretion layer
TRENCH TERMINATED AT 7 FEET
REFUSAL
/
•m
Figure A-156, Log of Trench TlOl
1 ' 1 1^
LCG
SAMPLE SYMBOLS ° "' '""'^'"'^ ""SUCCESSFUL
DISTURBED OR SAG SAMPLE
E.
B.
m
. STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE ¥ **- ^'^'^^^ ^^^'-^ °^ SEEPAGE | NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
w
« PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
to o SOIL
CUSS
(USCS)
TRENCH T102
ELEV. (MSL.) 210
EQUIPMENT
DATE COMPLETED 11/15/99
TRACKHOE JD 555 24"
SUJ^
UJ UJs;
>•
§u^
a
CJ
- 0
- 2
- 4
- 6
8
MATERL\L DESCRIPTION
0
M-
CL
COLLUVIUM
Soft to Stiff, moist, daric brown, Sandy CLAY
-Porous, with rootiets, root-voids
-Becomes very stiff, less porous
Ha SM SANTIAGO FORMATION
Very dense, dry, light orange-brown, cemented,
Silty, coarse SANDSTONE, concretion layer
TRENCH TERMINATED AT 8 FEET
REFUSAL
Figure A-157, Log of Trench T102 LCG
SAMPLE SYMBOLS ° - UNSUCCESSFUL
^ ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST • ... DRIVE SAMPLE (UNDISTURBED)
. CHUNK SAMPLE X... WATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
TRENCH T103
ELEV. (MSL.) 250
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24"
MATERIAL DESCRIPTION
1-^.
TOPSOIL
Soft, damp, daric brown, very Clayey, fine SAND
SANTIAGO FORMATION
Dense, damp, light reddish-brown to brown, Silty,
fine SANDSTONE, massive, blocky
Hard, damp to moist, oUve-brown, Silty
CLAYSTONE, with abimtlant gypsum (calcium
sulfate) in alternating layers
-Horizontal, laminated beds
TRENCH TERMINATED AT 13 FEET
Figure A-158, Log of Trench T103 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
S ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
•* PROJECTNO. 06403-12-01
- 0
DEPTH
IN
FEET
SAMPLE
NO.
>-to O
d SOIL
CUSS
(USCS)
TRENCH T104
ELEV. (MSL.) 320
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24"
MATEIUAL DESCRIPTION
IN
U17X
tfJ,.'
a
UJ^
U
2 -
- 4 -
L 6 _
SM
CL
COLLUVIUM
^ ^??».*^> Jigly Gravelly,_Sil^ SAND
Stiff, moist, olive, Sandy CLAY
SM
SANTIAGO FORMATION
Very dense, damp, light brown-orange, Silty, fine
SANDSTONE, widi some clay
-Horizontal laminated bedding
TRENCH TERMINATED AT 7 FEET
m
0
0
m
m
0
Figure A-159, Log of Trench T104 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED) SAMPLE SYMBOLS
^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE X. . UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>• tD O _l
o
SOIL
CUSS
(USCS)
TRENCH T105
ELEV. (MSL.) 302
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOEJD555 24"
;UJ'
a:
UJ^tO
§U^
>'b cn
a
Si-to: H UJ
•o u
- 0
MATERIAL DESCRIPTION
h 2 -
4 -
6 -
SM
m m m m
SM
COLLUVIUM
Loose, humid, light reddish-brown, Silty, fine
SAND, with some clay and pebble-gravel
-Porous, with root-voids, burrows
SANTIAGO FORMATION
Very dense, damp, light tan. Sil^, fine
SANDSTONE
-Horizontally bedded
m
%.
TRENCH TERMINATED AT 7 FEET
I
Figure A-160, Log of Trehch T105 LCG
SAMPLESYMBOLS °- SAMPLING UNSUCCESSFUL
W ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST DRIVE SAMPLE (UNDISTURBED) '
CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE f
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
IP
ft.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> tD O _I a X I-
SOIL
CUSS
(USCS)
TRENCH T106
ELEV. (MSL.) 310
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24"
on •
i-Su-
n U-w
go
>'b
a
hi^
3.
tn UJ
•o u
- 0 MATERIAL DESCRIPTION
- 2 -
- 4 -ri06-l
- 6 -
.1-SM
CL
COLLUVIUM
^ Loose,_(h:^, Ught broM, GraveUy,_Sil^_SANp
Stiff, moist, olive, Sandy CLAY
m m m
SM
SANTIAGO FORMATION
Very dense, damp, Ught tan, Silty. fine
SANDSTONE
-Upper 12" moderately cemented
mmi
mi
TRENCH TERMINATED AT 7 FEET
Figure A-161, Log of Trench T106 LCG
SAMPLESYMBOLS ° SAMPLING UNSUCCESSFUL
@... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION
. CHUNK SAMPLE
TEST 1... DRIVE SAMPLE (UNDISTURBED)
X... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDrCATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO. >• CD O _1 o X I-H
SOIL
CUSS
(USCS)
TRENCH T107
ELEV. (MSL.) 301
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24"
IN
UJ5;
K8
H .
§^
go
>-b
cn
a - 0 /A
MATERIAL DESCIUPTION
h 2 -
4 -
6 -
8
SC
m
:K:f:
* »
SM
COLLUVIUM
Loose, humid, mecUum dark brown. Qayey, fine
SAND, with some sUt, scattered gravel
SANTIAGO FORMATION
Very dense, damp, Ught tan to gray, SUty, fine
SANDSTONE
TRENCH TERMINATED AT 8 FEET
Figure A-162, Log of Trench T107 1 1 ' ifc
LCG
SAMPLESYMBOLS °- SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST 1 ... m
DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X... UATER TABLE OR SEEPAGE ^
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON-APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>~ tD O _l
o X t-H
SOIL
CUSS
(USCS)
TRENCH T108
ELEV. (MSL.) 320
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24"
tn,
UJ.
a
UJ5
win
u
- 0 MATERL\L DESCRIPTION
m
- 2 -
- 4 -
6 -
8 -
ri08-l
ri08-2
SC
•:p".'-;V
A^
* » »l •
SM-GM \
TOPSOIL
Loose, dry, daric brown. Clayey, Gravelly SAND,
with some sUt
SM
LIND AVISTA FORMATION
Very dense, damp, reddish-brown, very Gravelly,
medium SANDSTONE
-Irregular, nearly horizontal contact
SANTIAGO FORMATION
Dense, danqj, Ught tan, SUty, fine SANDSTONE
/
0
TRENCM TERMINATED AT 9 FEET
Figure A-163, Log of Trench T108 LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E. . STANDARD PENETRATION TEST • . . DRIVE SAMPLE (UNDISTURBED)
@ ... DISTURBED OR BAG SAMPLE B. . CHUNK SAMPLE X . . UATER TABLE OR SEEPAGE
0
0
m NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC SORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-tD Q _1 a X I-H
SOIL
CUSS
(USCS)
TRENCH T109
ELEV. (MSL.) 285
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24" 3 to;
hi,
§U.
>-b
a
hi^
u
- 0 MATERL\L DESCIUPTION
- 2 -
- 4 -
6 -
8 -
SM
COLLUVIUM
Loose, dry to humid, medium light brown.
Gravelly, Silty, fine SAND, with clay, porous, with
numerous root-voids, burrows
SM
-Irregular contact inclined northwest
\
SANTIAGO FORMATION
Dense, damp, light tan to gray, SUty, fine
SANDSTONE /
m
TRENCH TERMINATED AT 9.5 FEET
Figure A-164, Log of Trench T109 Ik,
LCG
SAMPLE SYMBOLS ° - UNSUCCESSFUL
W ... DISTURBED OR BAG SAMPLE
E.
B.
. STANDARD PENETRATION TEST 1 .
. CHUNK SAMPLE X .
. DRIVE SAMPLE (UNDISTURBED) |^
. UATER TABLE OR SEEPAGE j**
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO SE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
m
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-
tD a -1 o
X
I-H _1
SOIL
CUSS
(USCS)
TRENCH TllO
ELEV. (MSL.) 320
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24"
;UJ' o
ft i^i-f
Ul
gu:
Bti
>-b
a
hi^ h
u
MATEIUAL DESCRIPTION
- 2
- 4
- 6
8
JM-GM TOPSOIL
Loose, dry, reddish-brown, GraveUy, SUty SAND
JM-GM
m m m
LINDAVISTA FORMATION
Very dense, damp, reddish-brown, conglomeratic
SANDSTONE, massive, with some clay and
cemented lenses
-Irregular deposition contact nearly horizontal
SM
SANTIAGO FORMATION
Dense, damp, light tan, SUty, fine SANDSTONE
-Massive to horizontaUy bedtled
TRENCH TERMINATED AT 8 FEET
Figure A-165, Log of Trench TllO LCG
SAMPLE SYMBOLS n ... SAMPLING UNSUCCESSFUL
@ ... DISTURBED OR BAG SAMPLE
E ... STANDARD PENETRATION TEST I ... DRIVE SAMPLE (UNDISTURBED)
B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
>-tD O _l
o X H-H
SOIL
CLASS
(USCS)
TRENCH Till
ELEV. (MSL.) 315
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24"
:uj' y. o
£5 Ptf^tn
UJ;
tn,
>-b
a
uj^5
h r.
is '
- 0
MATERL\L DESCRIPTION
- 2 -
- 4 -
6 -
8
.1-SM
r * i • • m m m
SC
SM
TOPSOIL
\ Loose, dry, light brown, SUty, GraveUy SAND
SANTIAGO FORMATION
Medium dense, damp, reddish-brown. Clayey, fine
V SANDSTONE
*^ _ -Very weathered
Very dense, damp, li^t tan, SUty, fine
SANDSTONE
-3" olive CLAYSTONE layer, horizontal
TRENCH TERMINATED AT 8 FEET
^0
m^
L
L
I
L
IB,,
L
L
L
Figure A-166, Log of Treiich Till LCG
SAMPLE SYMBOLS • SAMPLING UNSUCCESSFUL E... STANDARD PENETRATION TEST I... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
« PROJECT NO. 06403-12-01
DEPTH
IN
FEET
SAMPLE
NO.
> (D O -I O X
I-
H -J
SOIL
CLASS
(USCS)
TRENCH T112
ELEV. (MSL.) 319
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24" UJ
IN
toH hl-zi a: a
uj-5
*-o u
- 0 MATERIAL DESCRIPTION
h 2 H
4
6
8
a. * • »
• 9 • #H
GP
A.&..t.
.l—i —L
SM
LINDAVISTA FORMATION
Dense, damp, reddish-brown, very GraveUy
SANDSTONE, with some clay, scattered, oversize
(> 12" diameter) boulders
-Irregular, near-horizontal contact
SANTIAGO FORMATION
Dense, damp, Ught tan-brown, SUty, fine SAND
TRENCH TERMINATED AT 8 FEET
Figure A-167, Log of Trench T112 LCG
SAMPLE SYMBOLS n... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST I... DRIVE SAMPLE (UNDISTURBED)
^ ... DISTURBED OR BAG SAMPLE B... CHUNK SAMPLE Z ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO~BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
PROJECT NO. 06403-12-01
- 0
DEPTH
IN
FEET
SAMPLE
NO.
>-CD a _i a X H-H
SOIL
CUSS
(USCS)
TRENCH T113
ELEV. (MSL.) 285
EQUIPMENT
DATE COMPLETED 11/16/99
TRACKHOE JD 555 24"
MATERL\L DESCRIPTION
5W .
^hl
io UJ.
cn a
2 -
4 -
6 -
1
m
SM TOPSOIL
Loose, dry, light brown, SUty, GraveUy SAND
-Porous
SC
SANTIAGO FORMATION
MecUum dense, danqi, reddish-brown, very Clayey,
fine SANDSTONE, massivi
y
-Becomes very dense
TRENCH TERMINATED AT 7 FEET
Figure A-168, Log of Trench T113 LCG
SAMPLE SYMBOLS • ... SAMPLING UNSUCCESSFUL E ... STANDARD PENETRATION TEST
... DISTURBED OR BAG SAMPLE B ... CHUNK SAMPLE
• DRIVE SAMPLE (UNDISTURBED)
X ... UATER TABLE OR SEEPAGE
NOTE: THE LOG OF SUBSURFACE CONDITIONS SHOUN HEREON APPLIES ONLY AT THE SPECIFIC BORING OR TRENCH LOCATION AND AT THE
DATE INDICATED. IT IS NOT UARRANTED TO BE REPRESENTATIVE OF SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND TIMES.
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/30/99
ELEVATION
360 FEET MSL
X H 0-UJ
Q
10
15
20
25
30
35
AIR TRACK
BORING AT-1
Marginal to
Non-
Rippabte Rippable Non-Rippabie
-1 1 1 1 1—
30 40 50 60 70
DRILL RATE (seconds per foot)
SO
GEOCON
1 1
90 100 110
06403-12-01 LA COSTA Slt-ZMS
FIG. A-169
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/30/99
ELEVATION
335 FEET MSL
10
15
20
35
40
45
50
AIR TRACK
BORING AT-2
Marginal to
Non-
Rippable Rippable Non-Rippable
-1 j i 1
10 20 30 40 50 60 70
DRILL RATE {seconds per foot)
GEOCON
80 90 100 110
06403-12-01 LA COSTA GREENS FIG. A-170
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/29/99
ELEVATION
22S FEET MSL
10
0)
X 25
a. LU Q
AIR TRACK
BORING AT-3
Marginal to
Non-
Rippable Rippable Non-Rippable
I I'" I
40 50 60 70 80 90
DRILL RATE (seconds per foot)
GEOCON
•NVOnrOHATID
100 110
06403-12-01 LA COSTA GREENS
FIG. A-171
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/29/99
ELEVATION
225 FEET MSL
10
15
20
(D
X 25
LU
Q
30
35
40
45
50
AIR TRACK
BORING AT-4
Marginal to
Non-
Rippable Rippable Non-Rippable
—r-
10 20 30
—r-
50
—I—
70 40 50 60
DRILL RATE {secondsrper foot)
80
GEOCON
•wsokrasATis
90 100 110
OS403-12-01 LA COSTA GREEtlS
FIG. A-172
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/29/99
ELEVATION
250 FEET MSL
10
15
20
0)
S
X 25 H Q.
UJ Q
30
35
40
45
50
AIR TRACK
BORING AT-5
Marginal to
Non-
Rippable Rippable Non-Rippable
10
06403-12-01 LA COSTA GREENS
20 30
—I 1 1 1 r
40 50 60 70 80
DRILL RATE (seconds perfect)
GEOCON
90 100 110
FIG. A-173
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/29/99
ELEVATION
350 FEET MSL
X 25
Q. LU
D
35
40
45
50
AIR TRACK
BORING AT-6
Marginal to
Non-
Rippable Rippable Non-Rippable
i 1 ' ' ' ^
10 20 3D 40 50 60 70
DRILL RATE (seconds per foot)
80
GEOCON
imaa%ro%Ai»n
90 100 110
06403-12-01 LA COSTA GIIEENS FIG. A-174
06403-12-01 VILLAGES OF LA COSTA - THE GREENS U/29/99
ELEVATION
255 FEET MSL
30
35
40
45
50
AIR TRACK
BORING AT-7
Marginal to
Non-
Rippable Rippable Non-Rippable
—r-
10 20 30
—I—
40
—1—
50 60
—r—
70
—!—
80
DRILL RATE (seconds per foot)
90
GEOCON
tMoo Bra aAVID
I
ICQ 110
06403-12-01 lA COSTA GSEEMS FIG. A-175
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/29/99
ELEVATION
240 FEET MST.
10
15
20
0)
X 25
a
LU
a
30
35
40
45
50
AIR TRACK
BORING AT-8
Marginal to
Non-
Rippabie Rippable Non-Rippable
10 20 30
—I 1— 1 r-
40 50 60 70
DRILL RATE (seconds per foot)
GEOCON
INaOKrOMATIB
80 90 100 110
06403-12-01 LA COSTA GREEKS
FIG. A-176
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/29/99
ELEVATION
230 FEET MSL
15
20
01
X 25 I-
Q.
LU
Q
30
35
40
45
50
AIR TRACK
BORING AT-9
Marginal to
Non-
Rippable Rippable Non-Rippable
10 20 30
—T—
40
—T—
50
—I—
60
GEOCON
70
—r-
80 90
DRILL RATE (seconds per foot)
•"I
100
—I
110
06403-12-01 LA COSTA GREENS
FIG. A-177
06403-12-01
10
15
m
20
•m
m 1 ^
<m \
mJ DEPTH 25
VILLAGES OF LA COSTA - THE GREENS 11/29/99
ELEVATION
AIR TRACK
BORING AT-10
Marginal to
Non-
Rippable Rippable Non-Rippable
06403-12-01 LA COSTA GREENS
50 60 70
DRILL RATE (seconds per foot)
GEOCON
110
FIG. A-178
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/30/99
ELEVATION
245 FEET MSL
10
15
01
J)
X 25 I-Q-
Lii
Q
30
35
40
45
50
AIR TRACK
BORING AT-11
GEOCON
Marginal to
Non-
Rippable Rippable Non-Rippable
—r-
10 20
m
m
m
m
30 40 50 60 70
DRILL RATE (seconds per foot)
—I 1 1 1
80 90 100 110
0
%•
m
h
0
«.
0
0
0
0
tm
r
0
m
Ik
06403-12-01 LA COSTA GREEKS FIG. A-179
06403-12-01 VILLAGES OF LA COSTA - THE GREENS ii^^^^
ELEVATION
H
AIR TRACK
BORING AT-12
Marginal to
Non-
Rippable Rippable Non-Rippable
06403-12-01 LA COSTA GREENS
40 50 60 70
DRILL RATE (seconds per foot)
80
GEOCON
90 100 110
FIG. A-180
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/30/99
ELEVATION
380 FEET MSL
10
15
20
01
X 25
Q.
LU
Q
30
35
40
45
50
AIR TRACK
BORING AT-13
Marginal to
Non-
Rippable Rippable Non-Rippable
10 20 30
1 1 1—
40 50 60 70
DRILL RATE (seconds per foot)
GEOCON
80 90 100 110
06403-12-01 LA COSTA GREEK'S FIG. A-181
06403-12-01
m
X 25
a. LU o
VILLAGES OF LA COSTA - THE GREENS
AIR TRACK
BORING AT-14
Marginal to
Non-
Rippable Rippable Non-Rippable
06403-12-01 LA COSTA GREENS
r
50 60 70
DRILL RATE (seconds per foot)
80
U/30/99
ELEVATION
JSS^FEETMSL
GEOCON
90 100 110
FIG. A-182
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/30/99
ELEVATION
355 FEET MSL
10
15
20
01
X 25
H Q_ UU O
30
35
40
45
50
AIR TRACK
BORING AT-15
GEOCON
Marginal to
Non-
Rippable Rippable Non-Rippabie
—I—
10 20 30
—I—
40
m
50
—r—
60
—r—
70 80 90
—I—
100
m
m '
0
0
m-'
110
DRILL RATE (seconds per foot)
0
0
m
0
0
06403-12-01 LA COSTA GREEN'S FIG. A-183
06403-12-01
0
m
0
VILLAGES OF LA COSTA - THE GREENS 11/30/99
ELEVATION
AIR TRACK
BORING AT-16
Marginal to
Non-
R'Ppable Rippable Non-Rippable
GEOCON
30
OS4Q3-12-01 LA COSTA GREEKS
40 50 60 70
DRILL RATE (seconds per foot)
80 90 100 110
FIG. A-184
06403-12-01 VILLAGES OF LA COSTA - THE GREENS 11/30/99
ELEVATION
380 FEET MSL
10
20
X 25 I-OL LU
Q
30
35
40
45
50
AIR TRACK
BORING AT-17
GEOCON
Marginal to
Non-
Rippable Rippable Non-Rippable
—p-
10 20 30
—I 1
40 50 60 70
DRILL RATE (seconds per foot)
80 90
—J—
100
—I
110
0€4a3-12-01 LA COSTA GREEKS FIG, A-185