HomeMy WebLinkAboutPD 2024-0012; CARRILLO ELEMENTARY SCHOOL; UPDATED GEOTECHNICAL EVALUATION FIELD TURF REPLACEMENT; 2024-09-16
Update Geotechnical Evaluation
Field Turf Replacement
Carrillo Elementary School
2875 Poinsettia Lane
Carlsbad, California
San Marcos Unified School District
255 Pico Avenue, Suite 100 | San Marcos, California 92069
May 17, 2024 | Project No. 108822013
Updated September 16, 2024
Geotechnical | Environmental | Construction Inspection & Testing | Forensic Engineering & Expert Witness
Geophysics | Engineering Geology | Laboratory Testing | Industrial Hygiene | Occupational Safety | Air Quality | GIS
Geotechnical & Environmental Sciences Consultants
5710 Ruffin Road | San Diego, California 92123 | p. 858.576.1000 | www.ninyoandmoore.com
Update Geotechnical Evaluation
Field Turf Replacement
Carrillo Elementary School
2875 Poinsettia Lane
Carlsbad, California
Ms. Tova Corman
San Marcos Unified School District
255 Pico Avenue, Suite 100 | San Marcos, California 92069
May 17, 2024 | Project No. 108822013
Updated September 16, 2024
Christopher T. Frank Senior Staff Engineer Jeffrey T. Kent, PE, GE Principal Engineer
CTF/JTK/mp
Geotechnical & Environmental Sciences Consultants
Ninyo & Moore | 2875 Poinsettia Lane, San Diego, California | 108822013 | September 16, 2024 i
CONTENTS
1 INTRODUCTION 1
2 SCOPE OF SERVICES 1
3 SITE DESCRIPTION 2
4 SITE BACKGROUND 2
5 PROJECT DESCRIPTION 3
6 SUBSURFACE EXPLORATIONS 4
7 GEOTECHNICAL LABORATORY TESTING 4
7.1. Moisture Content 5
7.2. Sieve Analysis by No. 200 Wash 5
7.3. Atterberg Limits 5
7.4. Soil Corrosivity 5
8 GEOLOGIC AND SUBSURFACE CONDITIONS 5
8.1. Regional Geologic Setting 6
8.2. Site Geology 6
8.2.1. Encountered Pavement Sections 6
8.2.2. Fill 7
8.2.3. Alluvium 7
8.2.4. Santiago Formation 7
8.3. Groundwater 7
8.4. Flood Hazard 8
9 DISCUSSION AND CONCLUSIONS 9
10 RECOMMENDATIONS 10
10.1. Earthwork 10
10.1.1. Site Preparation 10
10.1.2. Excavation Characteristics 10
10.1.3. Temporary Excavations 10
10.1.4. Construction Dewatering 11
10.1.5. Cement-Treatment of Artificial Turf Field Pad Subgrade 11
10.1.6. Cement-Treatment of AC Hardcourt Pavement Subgrade 12
10.1.7. Materials for Fill 12
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10.1.8. Compacted Fill 13
10.1.9. Pipe Bedding and Modulus of Soil Reaction (E’) 14
10.1.10. Utility Pipe Zone Backfill 14
10.1.11. Utility Trench Backfill 15
10.1.12. Slopes 15
10.1.13. Surface Drainage 16
10.2. Interceptor and French Drains 16
10.3. Flexible Pavement Reconstruction 17
10.4. Corrosion 17
10.5. Concrete 18
11 TURF FIELD INFILTRATION 18
12 PRE-CONSTRUCTION CONFERENCE 18
13 PLAN REVIEW AND CONSTRUCTION OBSERVATION 18
14 LIMITATIONS 19
15 REFERENCES 21
TABLES
1 – Encountered Pavement Section Thicknesses 7
2 – Groundwater Depth Measurements 8
3 – Recommended Preliminary Flexible Pavement Sections 17
FIGURES
1 – Site Location
2 – Boring Locations
3 – Geology
4 – Interceptor and French Drain Plan
5 – Field Interceptor Drain Detail
6 – Classroom Interceptor Drain Detail
7 – AC Interceptor Drain Detail
8 – Perimeter French Drain Detail
9 – Central French Drain Detail
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APPENDICES
A – Boring Logs
B – Geotechnical Laboratory Testing
C – Analytical Testing Results
D – Response and Supplemental Recommendations Letter (Ninyo & Moore, 2024b)
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1 INTRODUCTION
In accordance with our proposal dated October 13, 2023 and your approval, we have performed an
update geotechnical evaluation of the subsurface conditions at the existing playfield and surrounding
areas in the eastern portion of the Carrillo Elementary School campus in San Diego, California
(Figure 1). The purpose of our services was to evaluate the perched water conditions at the location
of the existing natural turf play field and to provide geotechnical recommendations for the design and
construction of a new artificial field turf.
2 SCOPE OF SERVICES
Our scope of services included the following:
• Reviewing background information including our previous agronomic report (Ninyo & Moore,
2023), available as-built plans including utility plans, as-graded plans, geotechnical reports, topographic maps, geologic maps, and other background information for the site.
• Performing a geologic reconnaissance of the site, marking out the boring locations, and coordinating with Underground Service Alert (USA) and school district personnel for clearance of the existing underground utilities at the exploration locations.
• Subcontracting with a private utility locating company to assist in the location of possible underground utilities in the vicinity of our boring locations.
• Subcontracting with a private leak detection company to investigate various piping systems in the vicinity of the field turf.
• Drilling, logging, and sampling four exploratory borings to depths of approximately 15 feet using a limited-access drill rig. The borings were logged and sampled by Ninyo & Moore personnel. Soil
samples were secured at selected intervals from within the borings and transported to our in-house geotechnical laboratory for analysis.
• Installing temporary standpipe piezometers in the borings.
• Excavating shallow pothole trenches at the northern portion of the existing natural turf field.
• Performing periodic monitoring and documentation of groundwater depth measurements from the temporary piezometers at selected time intervals.
• Performing geotechnical laboratory testing on representative samples to evaluate pertinent soil characteristics and design parameters.
• Subcontracting with an outside laboratory to perform water quality testing on samples collected from within the temporary piezometers.
• Compiling and performing an engineering analysis of the data obtained.
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• Preparing this update geotechnical report providing our findings, conclusions, and recommendations regarding the subsurface soil and water conditions at the existing natural turf field along with our geotechnical recommendations for the design and construction of a new artificial field turf.
3 SITE DESCRIPTION
The project site is the existing turf play field within the Carrillo Elementary School campus that is
located in Carlsbad, California (Figure 1). The school campus is located on an irregular shaped
parcel bounded by an ascending slope toward Poinsettia Lane to the northwest, an ascending
slope toward Melrose Drive to the northeast, and a descending canyon slope leading into Leo
Carrillo Historic Park to the south, southwest, and southeast. The school site generally consists
of school buildings and facilities in the southern and central portions of the campus, asphalt
concrete (AC) paved play courts in the central portion of the campus, AC parking lots in the
western portion of the campus, and a play field in the northern and eastern portions of the campus
(Figure 2). The project site is located in the northern portion of the campus in the existing natural
turf play field. Ascending slopes with approximate inclinations of 2:1 (horizontal to vertical) are
located adjacent to the northwest and northeast portions of the existing natural turf play field. A
descending slope with an approximate inclination of 2:1 (horizontal to vertical) is located adjacent
to the southeast edge of the existing turf play field and other portions of the school campus are
next to the southwest portion of the existing turf play field. The existing natural turf play field gently
slopes to the south with elevations ranging from approximately 275 feet above Mean Sea Level
(MSL) at the north end of the field to approximately 269 feet above MSL at the south end.
4 SITE BACKGROUND
Our background review involved researching and reviewing documents provided by District
personnel, the City of Carlsbad archives, readily available publications, and our own in-house
information and literature. Specifically, the pertinent documents reviewed for this project included
the following:
• Geotechnical Investigation – Melrose Drive Detention Embankment (Geocon, 1993)
• Grading Plans for Rancho Carrillo (Rick Engineering, 1996)
• Addendum Letter and Proposed Subdrain Relocation (Geocon, 1997)
• Final Report for Testing and Observation Services – Melrose Dam (Geocon, 1998)
• Geotechnical Investigation for Rancho Carrillo School (Kleinfelder, 1998)
• Grading Plans for Carrillo Elementary School (K&S Engineering, 1999)
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• Limited Geotechnical Evaluation – Planned Classroom Modules (Geotek, 2014)
• Limited Geotechnical Evaluation Associated with Agronomy (Ninyo & Moore, 2023)
Based on our review of the background documents, initial development of the site had occurred
in the late 1990’s as a part of the greater Rancho Carrillo Development. Prior to development, the
site was featured as a natural drainage valley trending east to west across the site. The
northeastern portion of the site was developed as a part of the Melrose Drive detention
embankment, which was constructed to dam the drainage path and provide temporary water
detention on the northeast side of Melrose Drive (Geocon, 1998). The western portion of the site
had included buttress fills and a shear key built into the ascending slope towards Poinsettia Lane
due to the landslide debris present at the site (Kleinfelder, 1998). The remaining development of
the site involved backfilling the pre-existing drainage valley with fill soils of up to approximately
20 feet and installing a subdrain to convey the natural collection of water, which was originally
planned to run northeast to southwest through the central portion of the presently-located natural
turf play field (Rick Engineering, 1996). However, it was proposed during initial grading to relocate
the planned subdrain to run through the northern portion of the presently-located natural turf play
field due to the quantity of anticipated soil removals (Geocon, 1997). The as-built location of the
subdrain is unknown at this time and the approximated possible locations are presented on
Figure 2.
Subsequent to the Rancho Carrillo development, grading and construction for Carrillo Elementary
School was completed in 1999, which included predominantly cuts of up to approximately 5 feet
in the northeastern portion of the site (K&S, 1999). Additional development included the
construction of two portable classrooms on the northwestern portion of the site in the vicinity of
the existing playfield, both of which have recently been observed to develop signs of water
staining and mineral accumulation. The existing playfield has been reportedly exhibiting poor
agronomic quality as far back as the early 2000s, and although remediation efforts were
performed in recent years, the current conditions are unable to support healthy natural turf. To
date, areas of the northern portion of the campus have been restricted from use due to the poor
agronomic conditions and impacts of recurring water seepage.
5 PROJECT DESCRIPTION
Based on our correspondence with you and our multiple site visits, water has been reportedly
seeping through cracks in the asphalt concrete (AC) hardcourt area and signs of water staining
on the concrete floor slabs for the two newer buildings at the northwestern portion of the campus
are developing. Additionally, the playfield has been exhibiting poor agronomic conditions and
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showing signs of water intrusion as well. Agronomic testing was performed during our previous
limited geotechnical evaluation of the play field (Ninyo & Moore, 2023), in which elevated levels
of available sodium and SAR (sodium adsorption ratio) were indicated. We understand that the
district is planning to replace the existing natural turf play field with an artificial turf system utilizing
TenCate Grass products, drainage blankets, and various underdrains to control and convey the
water entering the area. Additionally, we understand that the district is planning to reconstruct the
existing AC hardcourt pavement areas which will include minor grade changes in the southern portion.
6 SUBSURFACE EXPLORATIONS
Our subsurface explorations were performed in two phases to evaluate potential sources of the
water seepage observed at the natural turf play field. The first phase of the exploration was
performed from November 8 and November 9, 2023, and included the drilling, logging, and
sampling of four small-diameter borings (B-1 through B-4). The borings were drilled to depths of
approximately 15 feet using a truck-mounted drill rig equipped with 8-inch diameter hollow stem
augers. The four borings were converted into temporary piezometers (i.e., temporary monitoring
wells) in order to document the depth to water and collect water samples for analytical testing by
an outside laboratory. Ninyo & Moore personnel logged the borings in general accordance with
the Unified Soil Classification System (USCS) and ASTM International (ASTM) Test Method
D2488 by observing cuttings and drive samples. Bulk and in-place soil samples were obtained
from the borings at selected intervals. The samples were then transported to our in-house
geotechnical laboratory for testing. The approximate locations of the exploratory borings are
shown on Figure 2. The logs of the exploratory borings are presented in Appendix A.
The second phase of the exploration was performed on March 19, 2024, and included the
excavating of shallow trench potholes within areas along the toe of slope on the northern portion
of the existing play field. The shallow trench potholes were performed using a mini-excavator and
were extended to depths of approximately 5 feet. The area was explored in an attempt to locate
the potential subdrain system that may have been installed in the northern portion of the existing
natural turf play field (Geocon, 1997). The approximate locations of the possible canyon subdrains
and the general area where the shallow pothole trenches were performed are shown on Figure 2.
7 GEOTECHNICAL LABORATORY TESTING
Geotechnical laboratory testing for this study included an evaluation of in-situ dry density and
moisture content, sieve analysis by 200 wash, Atterberg limits, and soil corrosivity. The results of
the in-situ dry density and moisture content tests are presented at the corresponding depths on
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the boring logs presented in Appendix A. A summary of the laboratory test results is presented
below and descriptions of the test methods used are provided in Appendix B.
7.1. Moisture Content
Laboratory testing of the subsurface soils indicated in-situ dry densities ranging between 100 and
114.6 pounds per cubic foot (pcf) and moisture contents ranging between 12.5 and 23 percent.
The results of the in-situ dry density and moisture content tests are presented at the
corresponding depths on the excavation logs in Appendix A.
7.2. Sieve Analysis by No. 200 Wash
Subsurface soils collected from our borings were tested to evaluate the percentage of particles
finer than the No. 200 sieve. The results of these tests indicated fines content percentages ranging
between 17 and 50. These laboratory test results are presented in Appendix B.
7.3. Atterberg Limits
Fine-grained soil samples collected from our borings were tested to evaluate the liquid limit,
plastic limit, and plasticity index in order to classify and characterize the subsurface soils in
accordance with USCS. The samples tested indicated fines classification consisting of sandy lean
clay and clayey sand soils. These laboratory test results are presented in Appendix B.
7.4. Soil Corrosivity
Laboratory testing was performed on representative samples of the onsite earth materials to
evaluate pH and electrical resistivity, as well as chloride and sulfate contents. The results of the
corrosivity testing indicated electrical resistivities of 580 and 510 ohm-centimeters (ohm-cm), soil
pH values of 7.1 and 7.0, chloride contents of 960 and 980 parts per million (ppm), and sulfate
contents of 0.165 and 0.174 percent (i.e., 1,650 and 1,740 ppm). Based on a comparison with the
Caltrans (2021) corrosion guidelines, the onsite soils would be classified as corrosive. Corrosive
soils are defined as soil with an electrical resistivity of 1,500 ohm-cm or less, a chloride content
of 500 ppm or greater, a sulfate content of 0.15 percent (1,500 ppm) or greater, and/or a pH equal
to or less than 5.5.
8 GEOLOGIC AND SUBSURFACE CONDITIONS
Our findings regarding regional and site geology, groundwater conditions, faulting and seismicity,
and other geologic hazards at the subject site are provided in the following sections.
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8.1. Regional Geologic Setting
The project site is situated in the coastal foothill section of the Peninsular Ranges Geomorphic
Province. The province encompasses an area that extends approximately 900 miles from the
Transverse Ranges and the Los Angeles Basin south to the southern tip of Baja California (Norris
and Webb, 1990; Harden, 2004). The province varies in width from approximately 30 to 100 miles.
In general, the province consists of rugged mountains underlain by Jurassic metavolcanic and
metasedimentary rocks, and Cretaceous igneous rocks of the southern California batholith.
The Peninsular Ranges Province is traversed by a group of sub-parallel faults and fault zones
trending roughly northwest (Jennings, 2010). Several of these faults are considered active. The
Elsinore, San Jacinto, and San Andreas faults are active fault systems located northeast of the
project area and the Rose Canyon, Coronado Bank, San Diego Trough, and San Clemente faults
are active faults located west of the project site. Major tectonic activity associated with these and
other faults within the regional tectonic framework consists primarily of right-lateral, strike-slip
movement. The subject site is not located within a State of California Earthquake Fault Zone
(Alquist-Priolo Special Studies Zone). However, like the majority of Southern California, the site is
located in a seismically active area and the potential for strong ground motion is considered significant
during the design life of the proposed structure. The closest known major active fault is the Rose
Canyon Fault, which is located approximately 8¼ miles west of the project.
8.2. Site Geology
Geologic units mapped and encountered during our field reconnaissance and subsurface
exploration included fill soils, alluvial deposits, and materials of the Eocene–age Santiago
Formation (Kennedy and Tan, 2007). Generalized descriptions of the earth units encountered
during our subsurface exploration and that are mapped in the area are provided below.
Additional descriptions of the subsurface units are provided on the excavation logs in
Appendix A. The locations of the borings are presented on Figure 2.
8.2.1. Encountered Pavement Sections
Pavement sections consisting of AC over aggregate base materials or subgrade soils were
encountered during our subsurface exploration in borings B-1 and B-2. Borings B-3 and B-4
were performed in the existing natural turf play field (i.e., unpaved areas). Table 1
summarizes the pavement sections as encountered in our borings.
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Table 1 – Encountered Pavement Section Thicknesses
Boring Encountered AC Thickness (inches)
Encountered Aggregate Base Thickness (inches)
B-1 7 --
B-2 2½ 5
B-4 --* --*
B-4 --* --*
Note: AC = asphalt concrete * borings performed in unpaved areas
8.2.2. Fill
Fill soils were encountered at the surface or beneath the AC in each of our borings and
extended to depths up to approximately 10 feet. As encountered, the fill soils generally
consisted of various shades of brown, gray, black, and yellow, moist, medium dense, sand,
clayey sand, and soft to firm, sandy clay. Scattered amounts of gravel and cobbles were
encountered in the fill soils. Laboratory testing indicates that the moisture contents of the
encountered fill soils ranged between approximately 12.9 to 23 percent.
8.2.3. Alluvium
Materials mapped as young alluvial flood-plain deposits (Kennedy and Tan, 2007) were
encountered beneath the fill soils in each exploration and extended to depths of
approximately 15 feet. As encountered, the alluvium generally consisted of various shades
of brown and gray, moist to wet, loose to medium dense, clayey sand, silty sand, and firm
sandy clay. Scattered amounts of gravel and cobbles were encountered within the alluvium.
Laboratory testing indicates that the moisture contents of the encountered alluvial soils
ranged between 12.5 to 22.2 percent.
8.2.4. Santiago Formation
Materials mapped as Eocene–aged Santiago Formation (Kennedy & Tan, 2007) were
encountered beneath the alluvium in Boring B-4 and extended to the depths explored. As
encountered, the Santiago Formation generally consisted of light brown and white, moist,
weakly cemented, clayey sandstone. Trace amounts of gravel were encountered within the
Santiago Formation.
8.3. Groundwater
Groundwater was encountered during drilling of our borings B-1 and B-4 at a depth of
approximately 10 feet. Additionally, seepage was encountered at a depth of approximately 5 feet
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in boring B-1 and approximately 1 foot in boring A-3 during our previous exploration
(Ninyo & Moore, 2023). Our four borings (B-1 through B-4) were converted into temporary
piezometers (i.e., temporary monitoring wells) to measure groundwater at periodic intervals.
Encountered groundwater depth measurements were performed and the findings are presented
in Table 2.
Table 2 – Groundwater Depth Measurements
Date of Measurement B-1 B-2 B-3 B-4
11/8/2023 -- -- Not Encountered
During Drilling 10 feet deep(1)
11/9/2023 10 feet deep(1) Not Encountered During Drilling -- --
11/17/2023 At Surface At Surface At Surface 7.4 feet deep
12/14/2023 At Surface At Surface At Surface 9.1 feet deep
1/2/2024 At Surface At Surface At Surface 9.5 feet deep
1/12/2024 At Surface At Surface At Surface 9.2 feet deep
1/15/2024 --(2) At Surface At Surface 9.1 feet deep
3/12/2024 --(2) At Surface At Surface 8.9 feet deep
Notes: -- Not measured (1) Groundwater encountered during drilling. (2) Piezometer sealed on 1/12/2024
As presented in Table 2 above, borings B-1 through B-3 were observed to have water at the top
of the temporary piezometer (i.e., at the ground surface) during the measurements performed
after drilling installation. Water had also been observed at times to be seeping out through the
piezometer caps in borings B-1 and B-2. Additionally, during several of the measurements for
boring B-3, the water was observed to bubble up from the piping for the piezometer. These
occurrences are indicative of an artesian water condition.
Fluctuations in the groundwater level and perched water conditions may occur due to variations
in ground surface topography, subsurface geologic conditions and structure, rainfall, irrigation,
and other factors. In addition, utility trench lines may act as conduits for perched water conditions.
8.4. Flood Hazard
Based on review of Federal Emergency Management Agency (FEMA) Mapping Information
Platform website (2024), the site is not located within mapped floodplains, flood zones, or active
floodways. The site is also not located within a mapped dam inundation area, but the Melrose
Avenue mapped dam inundation area is situated just to the south of the site (CDWR, 2024). Based
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on this review and our reconnaissance, the potential for significant flooding and dam inundation
at the site are not design considerations.
9 DISCUSSION AND CONCLUSIONS
The purpose of our study was to evaluate the subsurface conditions on the northeastern portion
of the site and to provide geotechnical recommendations to address these conditions. Our study
included review of the referenced background reports and data, attendance at site meetings, leak
detection services, performance of site visits to observe and document the observed site
conditions, coordination and performance of a subsurface exploration and laboratory testing
program, compilation and engineering analysis of the data obtained, and preparation of
geotechnical recommendations for the design and construction of a new artificial field turf and
adjacent AC hardcourt pavements.
• The areas of the proposed new artificial field turf and adjacent AC pavements are underlain by fill soils which are in turn underlain by alluvial deposits that are in turn underlain by materials of the Santiago Formation.
• Due to the presence of a shallow perched water condition and the artesian water condition at the existing natural turf play field and adjacent AC pavements, recommendations for the
installation of an interceptor and French drain system are provided herein.
• As a result of the shallow perched water condition and the artesian water condition at the existing natural turf play field and adjacent AC pavements, the site soils in the project area are in a wet to saturated condition. To facilitate the construction of and provide subgrade support for the new artificial turf field, recommendations to cement treat the site soils are
provided herein.
• Excavations at the site will encounter a shallow perched water condition and the artesian
water condition. Accordingly, excavations are anticipated to cave and the contractor should be prepared to encounter these conditions.
• Due to the presence of a shallow perched water condition and the artesian water condition at the existing natural turf play field, the new artificial turf field should be designed for a “no infiltration” condition.
• Based on the results of our geotechnical laboratory testing presented in Appendix B, as compared to American Concrete Institute (ACI) 318, the onsite soils are defined as Exposure
Class S1 and C2. Additionally, the onsite soils are considered to be corrosive when compared to the Caltrans (2021) corrosion criteria.
• Consideration should be given to raising the site grades for the new artificial turf field as another mitigation effort to address the impacts from the perched water and artesian water conditions at the existing natural turf play field.
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10 RECOMMENDATIONS
Based on our evaluation, we recommend that an interceptor and French drain system be
constructed at the site (Figure 4) in an effort to mitigate the perched/artesian water conditions.
The following recommendations are provided for the design and construction of the proposed new
artificial turf system and associated improvements. The proposed site improvements should be
constructed in accordance with the requirements of the applicable governing agencies.
10.1. Earthwork
In general, earthwork should be performed in accordance with the recommendations presented
in this update report. Ninyo & Moore should be contacted for questions regarding the
recommendations or guidelines presented herein.
10.1.1. Site Preparation
Site preparation should begin with the removal of flatwork, vegetation, utility lines, asphalt,
concrete, and other deleterious debris from areas to be graded. Tree stumps and roots
should be removed to such a depth that organic material is generally not present. Clearing
and grubbing should extend to the outside of the proposed excavation and fill areas. The
debris and unsuitable material generated during clearing and grubbing should be removed
from areas to be graded and disposed of at a legal dumpsite away from the project area.
10.1.2. Excavation Characteristics
The results of our field exploration program indicate that the project site, as presently proposed,
is underlain by fill soils in turn underlain by alluvium that are in turn underlain by materials of
the Santiago Formation. Based our exploratory borings and shallow pothole trenches, we
anticipate that excavation of the fill and alluvium may generally be accomplished with
heavy-duty grading equipment in good operating condition. Zones containing gravel and
cobbles may be encountered and additional efforts including heavy ripping should be
anticipated. Loose, granular soils and groundwater were encountered in our exploratory
borings. Accordingly, caving of open excavations should be anticipated, particularly where
cohesionless soils are encountered, soil materials are submerged, seepage is encountered,
or where excavations are not promptly backfilled.
10.1.3. Temporary Excavations
For temporary excavations, we recommend that the following Occupational Safety and
Health Administration (OSHA) soil classifications be used:
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Fill and Alluvium Type C
Santiago Formation Type A
Upon making the excavations, the soil classifications and excavation performance should be
evaluated in the field by the geotechnical consultant in accordance with the OSHA
regulations. Temporary excavations should be constructed in accordance with OSHA
recommendations. For trench or other excavations, OSHA requirements regarding personnel
safety should be met using appropriate shoring (including trench boxes) or by laying back
the slopes to no steeper than 1½:1 (horizontal to vertical) in fill and alluvium and ¾:1 in
materials of the Santiago Formation. Temporary excavations that encounter seepage may be
shored or stabilized by placing sandbags or gravel along the base of the seepage zone.
Excavations encountering seepage should be evaluated on a case-by-case basis. On-site
safety of personnel is the responsibility of the contractor.
10.1.4. Construction Dewatering
As of the date of this update report, our monitoring well program indicated water tables
present at or near the ground surface. Groundwater should be anticipated during grading
operations. Dewatering measures during excavation should be prepared by the contractor’s
engineer and reviewed by the design engineer. Considerations for construction dewatering
should include anticipated drawdown, piping of soils, volume of pumping, potential for
settlement, and groundwater discharge. Disposal of groundwater should be performed in
accordance with guidelines of the Regional Water Quality Control Board (RWQCB) and the
local waste water treatment district.
10.1.5. Cement-Treatment of Artificial Turf Field Pad Subgrade
Based on the subsurface soil and perched/artesian water conditions we encountered at the
site, we recommend that the subgrade soils for the new artificial turf field consist of cement-
treated soil (CTS) as a means of improving the subgrade support and mitigating the potential
impacts of the perched/artesian water conditions. Based on our experience with similar
improvements and projects, along with the corrosive nature of the site soils, we recommend a
cement content of 7 percent based on the dry unit weight of the onsite soils exposed at the
artificial turf subgrade elevation be used. In general, construction of CTS should be in
accordance with the following recommendations:
Soils to be treated should not contain rocks or clods larger than 1 inch in dimension.
The in-place soils should be cement-treated in a single 18-inch-thick lift.
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Type V cement should be mixed into the existing soils at a content of approximately
7 percent (based on dry unit weight of the soil). Based on our laboratory testing and the variability of the site soils, a compacted dry density of 120 pounds per cubic foot (pcf) may be used for the site soils.
Water may need to be added to the cement-soil mix to provide a moisture content near the mixture’s optimum moisture content.
The CTS should be compacted to 95 percent of its Proctor density as evaluated by
ASTM D 558.
Compacted CTS should be protected from drying and traffic for a period of three to seven
days according to American Concrete Institute (ACI) 230.1R-09.
10.1.6. Cement-Treatment of AC Hardcourt Pavement Subgrade
Based on the subsurface soil and perched/artesian water conditions we encountered at the
site, we recommend that the subgrade soils for the reconstructed AC hardcourt pavements
consist of cement-treated soil (CTS) as a means of improving the subgrade support and
mitigating the potential impacts of the perched/artesian water conditions. Based on our
experience with similar improvements and projects, along with the corrosive nature of the site
soils, we recommend a cement content of 7 percent based on the dry unit weight of the onsite
soils exposed at the subgrade elevation be used. In general, construction of CTS should be in
accordance with the following recommendations:
Soils to be treated should not contain rocks or clods larger than 1 inch in dimension.
The in-place soils should be cement-treated in a single 18-inch-thick lift.
Type V cement should be mixed into the existing soils at a content of approximately
7 percent (based on dry unit weight of the soil). Based on our laboratory testing and the variability of the site soils, a compacted dry density of 120 pounds per cubic foot (pcf) may be used for the site soils.
Water may need to be added to the cement-soil mix to provide a moisture content near the mixture’s optimum moisture content.
The CTS should be compacted to 100 percent of its Proctor density as evaluated by ASTM D 558.
Compacted CTS should be protected from drying and traffic for a period of three to seven
days according to American Concrete Institute (ACI) 230.1R-09.
10.1.7. Materials for Fill
Onsite materials may be reused as engineered fill provided they meet the following
recommendations. Materials that exhibit an expansion index (EI) of 50 or greater are not
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 13
considered suitable for reuse as engineered fill and should be stockpiled separately and
disposed of offsite. Fill soils should possess an organic content of less than approximately
3 percent by volume (or 1 percent by weight), be free of debris, and exhibit an expansion
index (EI) of 50 or less (i.e., low expansion potential) as evaluated by ASTM D 4829. In
general, fill material should not contain rocks or lumps over approximately 3 inches in
diameter, and not more than approximately 30 percent larger than ¾ inch
Imported fill material, if needed, should generally be granular soils with a very low to low
expansion potential (i.e., an expansion index of 50 or less). Import fill material should not be
considered corrosive as defined by the Caltrans (2021) corrosion criteria. Materials for use
as fill should be evaluated by Ninyo & Moore’s representative prior to filling or importing. To
reduce the potential of importing contaminated materials to the site, prior to delivery, soil
materials obtained from off-site sources should be sampled and tested in accordance with
standard practice (DTSC, 2001). Soils that exhibit a known risk to human health, the
environment, or both, should not be imported to the site.
10.1.8. Compacted Fill
Prior to placement of compacted fill, the contractor should request an evaluation of the
exposed ground surface by Ninyo & Moore. Unless otherwise recommended, the exposed
ground surface should then be scarified to a depth of approximately 8 inches and watered or
dried, as needed, to achieve moisture contents generally at or slightly above the optimum
moisture content. The scarified materials should then be compacted to a relative compaction
of 90 percent as evaluated in accordance with ASTM D 1557. The evaluation of compaction
by the geotechnical consultant should not be considered to preclude any requirements for
observation or approval by governing agencies. It is the contractor's responsibility to notify
this office and the appropriate governing agency when project areas are ready for
observation and to provide reasonable time for that review.
Fill materials should be moisture conditioned to generally at or slightly above the laboratory
optimum moisture content prior to placement and should be generally consistent within the
soil mass. The optimum moisture content will vary with material type and other factors.
Prior to placement of additional compacted fill material following a delay in the grading
operations, the exposed surface of previously compacted fill should be prepared to receive fill.
Preparation may include scarification, moisture conditioning, and recompaction.
Compacted fill should be placed in horizontal lifts of approximately 8 inches in loose
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 14
thickness. Prior to compaction, each lift should be watered or dried as needed to achieve a
moisture content generally at or slightly above the laboratory optimum, mixed, and then
compacted by mechanical methods to a relative compaction of 90 percent as evaluated by
ASTM D 1557. The upper 12 inches of the subgrade materials beneath vehicular pavements
should be compacted to a relative compaction of 95 percent relative density as evaluated by
ASTM D 1557. Successive lifts should be treated in a like manner until the desired finished
grades are achieved.
10.1.9. Pipe Bedding and Modulus of Soil Reaction (E’)
It is our recommendation that new pipelines (pipes), where constructed in open excavations,
be supported on 6 or more inches of granular bedding material. Granular pipe bedding should
be provided to distribute vertical loads around the pipe. Bedding material and compaction
requirements should be in accordance with this update report. Pipe bedding typically consists
of graded aggregate with a coefficient of uniformity of three or more.
The modulus of soil reaction (E’) is used to characterize the stiffness of soil backfill placed at
the sides of buried flexible pipes for the purpose of evaluating deflection caused by the weight
of the backfill over the pipe (Hartley and Duncan, 1987). A soil reaction modulus of
1,200 pounds per square inch (psi) may be used for an excavation depth of up to
approximately 5 feet when backfilled soil compacted to a relative compaction of 90 percent
as evaluated by the ASTM D 1557.
10.1.10. Utility Pipe Zone Backfill
The pipe zone backfill should be placed on top of the pipe bedding material and extend to
1 foot or more above the top of the pipe in accordance with the recent edition of the Standard
Specifications for Public Works Construction (“Greenbook”). Pipe zone backfill should have
a Sand Equivalent (SE) of 30 or more, and be placed around the sides and top of the pipe.
Silts and clays should not be used as pipe zone backfill. Special care should be taken not to
allow voids beneath and around the pipe. Compaction of the pipe zone backfill should
proceed up both sides of the pipe.
It has been our experience that the voids within a crushed rock material are sufficiently large
to allow fines to migrate into the voids, thereby creating the potential for sinkholes and
depressions to develop at the ground surface. If open-graded gravel is utilized as pipe zone
backfill, this material should be separated from the adjacent trench sidewalls and overlying
trench backfill with a geosynthetic filter fabric.
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 15
10.1.11. Utility Trench Backfill
Based on our subsurface evaluation, the onsite materials should be generally suitable for
reuse as trench backfill provided they do not contain rocks or lumps over 3 inches, and not
more than 30 percent larger than ¾ inch. Larger chunks, if generated during excavation, may
be broken into acceptably sized pieces or disposed of offsite. Additionally, backfill materials
should have an organic content of less than approximately 3 percent by volume (or 1 percent
by weight), be free of debris, and exhibit an EI of 50 or less (i.e., low expansion potential) as
evaluated by ASTM D 4829. Trench backfill should be moisture-conditioned to generally at
or slightly above the laboratory optimum. Trench backfill should be compacted to a relative
compaction of 90 percent as evaluated by ASTM D 1557, except for the upper 12 inches of
the backfill beneath vehicular pavements, which should be compacted to a relative
compaction of 95 percent as evaluated by ASTM D 1557. Lift thickness for backfill will
depend on the type of compaction equipment utilized, but fill should generally be placed in
lifts not exceeding 8 inches in loose thickness. Special care should be exercised to avoid
damaging the pipe during compaction of the backfill.
10.1.12. Slopes
Unless otherwise recommended by our offices and approved by the regulating agencies,
permanent cut and fill slopes should not be steeper than 2:1 (horizontal to vertical). Interior
slopes for detention or infiltration basins should not be steeper than 3:1 (horizontal to
vertical).
Compaction of the face of fill slopes should be performed by backrolling at intervals of 4 feet
or less in vertical slope height, or as dictated by the capability of the available equipment,
whichever is less. Fill slopes should be overbuilt and cut back to finish grades. The
placement, moisture conditioning, and compaction of fill slope materials should be done in
accordance with the recommendations presented herein.
Site runoff should not be permitted to flow over the tops of slopes. Positive drainage should
be established away from the top of slopes. This may be accomplished by utilizing brow
ditches placed at the top of slopes to divert surface runoff away from the slope face where
drainage devices are not otherwise available.
The onsite soils may be susceptible to erosion. The project plans and specifications should
contain design features and construction requirements to mitigate erosion of soils or contain
a maintenance program to redress erosion features as they develop on a periodic basis.
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 16
10.1.13. Surface Drainage
Pad and slope surface drainage should be conveyed such that runoff water is diverted away
from slopes and structures to suitable discharge areas by nonerodible devices (e.g., gutters,
downspouts, concrete swales, etc.). Positive drainage adjacent to structures should be
established and maintained. Positive drainage may be accomplished by providing drainage
away from the foundations of structures at a gradient of 2 percent or steeper for a distance
of 5 feet or more, and further maintained by a graded swale leading to an appropriate outlet,
in accordance with the recommendations of the project civil engineer and/or landscape
architect.
Surface drainage on the site should be conveyed so that water is not permitted to pond. A
gradient of 2 percent or steeper should be maintained and drainage patterns should be
established to divert and remove water from the site to appropriate outlets.
Care should be taken by the contractor during final grading to preserve any berms, drainage
terraces, interceptor swales or other drainage devices of a permanent nature on or adjacent to
the property. Drainage patterns established at the time of final grading should be maintained for
the life of the project. The property owner and the maintenance personnel should be made aware
that altering drainage patterns might be detrimental to foundation performance.
10.2. Interceptor and French Drains
To mitigate the potential impacts of the perched/artesian water conditions at the existing natural
turf play field and adjacent AC hardcourt pavements, we recommend that an interceptor and
French drain system be installed around the perimeter of and beneath the existing natural turf
playfield and at the adjacent AC hardcourt pavements. The purpose of the interceptor and French
drain system will be to intercept the subsurface water and convey that water away from the
proposed improvements. The interceptor and French drains should be installed along the edges
and beneath the central portion of the existing natural turf playfield as shown on Figure 4.
Specifically, the interceptor and French drains should be located at the boundary of the concrete
walkway and the proposed field. Additionally, interceptor drains should be installed between the
classrooms and ascending slope on the northern portion of the campus, and beneath portions of
the existing AC hardcourt pavements as shown on Figure 4. The interceptor and French drains
should be approximately 4 feet deep with a slope of 1 percent to convey the intercepted water
away from the proposed improvements and towards a suitable outlet. The interceptor French
drains should be connected to each other as well as a free outlet by tightline. Recommended
details of the interceptor drain construction are shown on Figures 5, 6, and 7. Recommended
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 17
details for the construction of the perimeter and central French drains are shown on Figures 8
and 9.
10.3. Flexible Pavement Reconstruction
Based on our discussions with you and the recommendations contained within this update report,
the existing AC hardcourt pavement areas are to be reconstructed and the subgrade soils beneath
proposed AC pavements are to consist of cement-treated soil (CTS). Accordingly, we have used
an assumed design R-value of 50 and Traffic Indices (TI) of 4.5 and 7 for the basis of the
preliminary design of flexible pavements for the project. Actual pavement recommendations
should be based on R-value tests performed on bulk samples of the soils that are exposed at the
finished subgrade elevations across the site at the completion of the grading operations. The
preliminary recommended flexible pavement sections are presented in Table 3.
Table 3 – Recommended Preliminary Flexible Pavement Sections
Traffic Index (Pavement Usage) Design R-Value
Asphalt Concrete Thickness (inches)
Aggregate Base Thickness (inches)
4.5 (Pedestrian) 50 3 4
7 (Fire Lanes) 50 4 5
As indicated, these values assume TIs of 7.0 or less for site pavements. If traffic loads are different
from those assumed, the pavement design should be re-evaluated. In addition, we recommend that
aggregate base and the upper 12 inches of the subgrade be compacted to a relative compaction of
95 percent relative density as evaluated by the current version of ASTM D 1557.
10.4. Corrosion
Laboratory testing was performed on representative samples of the onsite earth materials to
evaluate pH and electrical resistivity, as well as chloride and sulfate contents. The pH and
electrical resistivity tests were performed in accordance with California Test (CT) 643 and the
sulfate and chloride content tests were performed in accordance with CT 417 and CT 422,
respectively. These laboratory test results are presented in Appendix B.
The results of the corrosivity testing indicated electrical resistivities of 580 and 510 ohm-
centimeters (ohm-cm), soil pH values of 7.1 and 7.0, chloride contents of 960 and 980 parts per
million (ppm), and sulfate contents of 0.165 and 0.174 percent (i.e., 1,650 and 1,740 ppm). Based
on a comparison with the Caltrans (2021) corrosion guidelines, the onsite soils would be classified
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 18
as corrosive. Corrosive soils are defined as soil with an electrical resistivity of 1,500 ohm-cm or
less, a chloride content of 500 ppm or greater, a sulfate content of 0.15 percent (1,500 ppm) or
greater, and/or a pH equal to or less than 5.5. We recommend that the design team consult with
a corrosion engineer for project specific recommendations.
10.5. Concrete
Concrete in contact with soil or water that contains high concentrations of water-soluble sulfates
that can be subject to premature chemical and/or physical deterioration. As noted, the soil
samples tested in this evaluation indicated water-soluble sulfate contents of 0.165 and
0.174 percent by weight (i.e., 1,650 and 1,750 ppm) and chloride contents of 960 and 980 ppm.
Based on the American Concrete Institute (ACI) 318 criteria, the site soils would correspond to
exposure classes S1 and C2. For these exposure classes, ACI 318 recommends that normal
weight concrete in contact with soil possess a compressive strength of 5,000 psi or more with a
water-cement ratio of 0.4 or less. Additionally, we also recommend that normal weight concrete
in contact with soil use Type II/V or V cement.
11 TURF FIELD INFILTRATION
As discussed previously in this update report, we encountered a perched/artesian water condition
at the existing natural turf play flied. Additionally, due to the clayey nature of the site soils, the site
soils are anticipated to have poor infiltration characteristics. Such conditions may adversely
impact the proposed new artificial turf field. In addition to the cement-treatment of the subgrade
soils, we recommend that a 20 mil or thicker impermeable liner be placed on the prepared
subgrade soils beneath the proposed new artificial turf field. Also, drainage for the proposed new
artificial turf field system should incorporate several collector drains beneath the artificial turf
elements that are connected to a discharge pipe that is connected to an appropriate outlet.
12 PRE-CONSTRUCTION CONFERENCE
We recommend that a pre-construction meeting be held prior to commencement of grading. The
owner or his representative, the agency representatives, the architect, the civil engineer,
Ninyo & Moore, and the contractor should attend to discuss the plans, the project, and the
proposed construction schedule.
13 PLAN REVIEW AND CONSTRUCTION OBSERVATION
The conclusions and recommendations presented in this update report are based on analysis of
observed conditions in widely spaced exploratory borings. If conditions are found to vary from
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 19
those described in this update report, Ninyo & Moore should be notified, and additional
recommendations will be provided upon request. Ninyo & Moore should review the final project
drawings and specifications prior to the commencement of construction. Ninyo & Moore should
perform the needed observation and testing services during construction operations.
The recommendations provided in this update report are based on the assumption that Ninyo &
Moore will provide geotechnical observation and testing services during construction. In the event
that it is decided not to utilize the services of Ninyo & Moore during construction, we request that
the selected consultant provide the client and Ninyo & Moore with a Division of the State
Architect (DSA) 109 form indicating that they fully understand Ninyo & Moore’s recommendations,
and that they are in full agreement with the design parameters and recommendations contained
in this update report. Construction of proposed improvements should be performed by qualified
subcontractors utilizing appropriate techniques and construction materials.
14 LIMITATIONS
The field evaluation, laboratory testing, and geotechnical analyses presented in this update report
have been conducted in general accordance with current practice and the standard of care
exercised by geotechnical consultants performing similar tasks in the project area. No warranty,
expressed or implied, is made regarding the conclusions, recommendations, and opinions
presented in this update report. There is no evaluation detailed enough to reveal every subsurface
condition. Variations may exist and conditions not observed or described in this update report may
be encountered during construction. Uncertainties relative to subsurface conditions can be
reduced through additional subsurface exploration. Additional subsurface evaluation will be
performed upon request. Please also note that our update evaluation was limited to assessment
of the geotechnical aspects of the project, and did not include evaluation of structural issues,
environmental concerns, or the presence of hazardous materials.
This document is intended to be used only in its entirety. No portion of the document, by itself, is
designed to completely represent any aspect of the project described herein. Ninyo & Moore
should be contacted if the reader requires additional information or has questions regarding the
content, interpretations presented, or completeness of this document.
This update report is intended for design purposes only. It does not provide sufficient data to prepare
an accurate bid by contractors. It is suggested that the bidders and their geotechnical consultant
per-form an independent evaluation of the subsurface conditions in the project areas. The
independent evaluations may include, but not be limited to, review of other geotechnical reports
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 20
prepared for the adjacent areas, site reconnaissance, and additional exploration and laboratory
testing.
Our conclusions, recommendations, and opinions are based on an analysis of the observed site
conditions. If geotechnical conditions different from those described in this update report are
encountered, our office should be notified, and additional recommendations, if warranted, will be
provided upon request. It should be understood that the conditions of a site could change with time
as a result of natural processes or the activities of man at the subject site or nearby sites. In addition,
changes to the applicable laws, regulations, codes, and standards of practice may occur due to
government action or the broadening of knowledge. The findings of this update report may,
therefore, be invalidated over time, in part or in whole, by changes over which Ninyo & Moore has
no control.
This update report is intended exclusively for use by the client. Any use or reuse of the findings,
conclusions, and/or recommendations of this update report by parties other than the client is
undertaken at said parties’ sole risk.
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 21
15 REFERENCES
American Concrete Institute, 2022, Building Code Requirements for Structural Concrete (ACI 318 19) and Commentary (ACI 318R-19).
American Society of Civil Engineers (ASCE), 2017, Minimum Design Loads for Buildings and Other Structures, ASCE 7-16.
American Society of Civil Engineers (ASCE), 2018, Supplement 1, Standard 7-16 Minimum Design Loads and Associated Criteria for Buildings and Structures: dated December 12.
Building News, 2021, “Greenbook,” Standard Specifications for Public Works Construction: BNI Publications.
California Building Standards Commission, 2022, California Building Code (CBC), Title 24, Part 2, Volumes 1 and 2.
California Department of Transportation (Caltrans), 2021, Corrosion Guidelines (Version 3.2), Division of Engineering and Testing Services, Corrosion Technology Branch: dated May.
California Department of Water Resources (CDWR), 2024, California Dam Breach Inundation Maps,
Division of Safety of Dams, fmds.water.ca.gov/maps/damim/: accessed in March.
California Geological Survey (CGS), 1998, Maps of Known Active Fault Near-Source Zones in California and Adjacent Portions of Nevada: dated February.
California Geological Survey (CGS), 2016, Earthquake Shaking Potential for California (revised): Map Sheet 48.
City of Carlsbad, 2015, Carlsbad General Plan, dated September.
County of San Diego, 1960, Topographic Survey, Ortho Sheet 346-1695.
County of San Diego, 1976, Topographic Survey, Ortho Sheet 346-1695.
Department of Toxic Substances Control (DTSC), 2001, Information Advisory – Clean Import Fill Material, http://www.dtsc.ca.gov/Schools/index.cfm: dated October.
Geocon, 1993, Geotechnical Investigation for Rancho Carrillo, Melrose Drive Detention Embankment, Carlsbad, California, Project No. 04787-12-07: dated December 15.
Geocon, 1997, Specifications Change, Melrose Avenue Dam, No. 1834, Carlsbad, California, Melrose Dam Specifications, Section 3, Project No. 05845-12-01B: dated March 11, 1997.
Geocon, 1998, Final Report of Testing and Observation Services During Site Grading, Rancho Carrillo, Melrose Drive Dam No. 1834, (Melrose Drive Station 98+00 to 110+10), Carlsbad, California, Project No. 05845-12-01B: dated February 11.
GeoTek, 2014, Limited Geotechnical Evaluation, Planned Classroom Modules, Carrillo Ranch Elementary School, Carlsbad, California, Project No. 3445-SD3: dated May 19.
Geotracker website, 2024, www.geotracker.waterboards,ca.gov: accessed in March.
Google Earth, 2024, https://www.google.com/earth/: accessed in March.
Harden, D.R., 2004, California Geology, 2nd ed.: Prentice Hall, Inc.
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 22
Hart, E.W., and Bryant, W.A., 2007, Fault-Rupture Hazard Zones in California, Alquist-Priolo
Earthquake Fault Zoning Act with Index to Earthquake Fault Zones Maps: California Department of Conservation, California Geological Survey, Special Publication 42, with Supplement 1 added in 2012, Supplement 2 added in 2014, Supplement 3 added in 2015,
and Supplement 4 added in 2016.
Historic Aerials website, 2024, www.historicaerials.com: accessed in March.
Jennings, C.W., 2010, Fault Activity Map of California and Adjacent Areas: California Geological
Survey, California Geological Map Series, Map No. 6.
K&S Engineering (K&S), 1999, Grading Plans for Carrillo Elementary School, San Marcos Unified School District, Carlsbad, California: Job No. 98029: dated January 15.
Kennedy, M.P., and Tan, S.S., 2007, Geologic Map of the Oceanside 30’ x 60’ Quadrangle, San Diego County, California, Scale 1:100,000.
Kleinfelder, 1998, Geotechnical Investigation and Geologic/Seismic Hazards Study for Rancho Carrillo School, San Marcos Unified School District, Carlsbad, California, Job No. 51-4816-01: dated August 1998.
Ninyo & Moore, In-house Proprietary Data.
Ninyo & Moore, 2023a, Limited Geotechnical Evaluation Associated with Agronomy, Carrillo Elementary School Play Fields, 2875 Poinsettia Lane, Carlsbad, California, Project No. 108822010: dated March 10.
Ninyo & Moore, 2023b, Proposal for Geotechnical Evaluation of Water Seepage, Carrillo Elementary School, 2875 Poinsettia Lane, Carlsbad, California, Project No. 108822000: dated
October 13.
Ninyo & Moore, 2024a, Geotechnical Evaluation, Field Turf Replacement, Carrillo Elementary School, 2875 Poinsettia Lane, Carlsbad, California, Project No. 108822013: dated April 26.
Ninyo & Moore, 2024b, Responses to Geotechnical Report Review Comments and Supplemental Recommendations, Carrillo Elementary School, 2875 Poinsettia Lane, Carlsbad, California, Project No. 108822013: dated August 23.
Norris, R. M. and Webb, R. W., 1990, Geology of California, Second Edition: John Wiley & Sons, Inc.
Rick Engineering Company (Rick), 1996, Grading Plans for Rancho Carrillo, City of Carlsbad, Project No PD 411: dated August 6.
Treiman, J.A., and Lundberg, M., 1999, Fault number 127g, Newport-Inglewood-Rose Canyon fault zone, Silver Strand section, in Quaternary fault: June 1.
United States Department of Agriculture, 1953, Aerial Photographs, Flight AXN-8M, Nos. 20, & 21:
dated March 31.
United States Department of the Interior, Bureau of Reclamation, 1989, Engineering Geology Field Manual.
United States Federal Emergency Management Agency (FEMA), 2012, Flood Insurance Rate Map (FIRM), No. 06073C1055G: dated May 16.
United States Federal Emergency Management Agency (FEMA), 2024, FEMA Mapping Information Platform, World Wide Web, https://hazards.fema.gov/femaportal/wps/portal/: accessed in March.
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024 23
United States Geological Survey, 2018, San Luis Rey, California, San Diego County, 7.5-Minute
Series (Topographic): Scale 1:24,000.
United States Geological Survey (USGS), 2024, 2008 National Seismic Hazard Maps - Fault Parameters, World Wide Web,
http://earthquake.usgs.gov/cfusion/hazfaults_2008_search/query_main.cfm/.
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024
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◄-!-- - -Anticline -Dashed where Inferred. Solid amm Indicates directim
of axial pk.Inge.
Landslide -Arrows indicate principal direction of movement
Queriedwhereexistenceisquestionable.
Strike and dip of beds
Inclined
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INTERCEPTOR AND FRENCH DRAIN PLAN
FIGURE 4
0120240
FEETo
CARRILLO
ELEMENTARY
SCHOOL
SITE BOUNDARY
LEGEND
108822013 | 9/24
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE, CARLSBAD, CALIFORNIA
POSSIBLE
SUBDRAIN
(RICK, 1998)
"
POSSIBLE
SUBDRAIN
(GEOCON, 1997)
"
PROPOSED FIELD INTERCEPTOR DRAIN (FIGURE 5)
PROPOSED PERIMETER FRENCH DRAIN (FIGURE 8)!!!!!
FRENCH AND
INTERCEPTOR DRAIN
CONNECTION
"
"
PROPOSED CENTRAL FRENCH DRAIN (FIGURE 9)!!!!!
!!
!!
!!
PROPOSED CLASSROOM INTERCEPTOR DRAIN (FIGURE 6)
PROPOSED AC INTERCEPTOR DRAIN (FIGURE 7)
!!INTERCEPTOR DRAIN CONNECTION
♦ ♦ ♦ ♦ ♦ ♦ ♦
••••
••••
Geotechnical & Environmental Sciences Consultants
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FIGURE 5
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE
CARLSBAD, CALIFORNIA
108822013 I 9/24
PIPE WITH A 1% GRADIENT TO A
8-INCH-DIAMETER PERFORATED
3 INCHES
OR MORE
48 INCHES
12 INCHES
SUITABLE OUTLET (PERFORATIONS DOWN)
3/4-INCH
COMPACTED FILL
CRUSHED ROCK
NON-WOVEN
GEOFABRIC
(MIRAFI 140-N
OR EQUIV.)
TOWARD FIELD
CEMENT-TREATED
SUBGRADE
COMPOSITE DRAIN ANDPROTECTION BOARD(MIRADRAIN 6200XL OREQUIVALENT)2 FEET
18 INCHES
NOT TO SCALE
CLASSROOM INTERCEPTOR DRAIN DETAIL
Geotechnical & Environmental Sciences Consultants
6 1
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3
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J
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FIGURE 6
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE
CARLSBAD, CALIFORNIA
108822013 I 9/24
PIPE WITH A 1% GRADIENT TO A
8-INCH-DIAMETER PERFORATED
3 INCHES
OR MORE
48 INCHES
12 INCHES
SUITABLE OUTLET (PERFORATIONS DOWN)
3/4-INCH
COMPACTED FILL
CRUSHED ROCK
NON-WOVEN
GEOFABRIC
(MIRAFI 140-N
OR EQUIV.)
TOWARD
CLASSROOMS
(I.E.,DOWNSLOPE)
UNDISTURBED
MATERIAL
2 FEET
COMPOSITE DRAIN AND
PROTECTION BOARD(MIRADRAIN 6200XL OREQUIVALENT)
NOT TO SCALE
AC INTERCEPTOR DRAIN DETAIL
Geotechnical & Environmental Sciences Consultants
7
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1
3
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FIGURE 7
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE
CARLSBAD, CALIFORNIA
108822013 I 9/24
3 INCHES
OR MORE
48 INCHES
3/4-INCH
COMPACTED FILL
CRUSHED ROCK
NON-WOVEN
GEOFABRIC
(MIRAFI 140-N
OR EQUIV.)
BENEATH ASPHALT CONCRETE (AC)
18 INCHES CEMENT-TREATED
SUBGRADE
2 FEET8-INCH-DIAMETER PERFORATED PIPE WITH
A 1% GRADIENT TO A SUITABLE OUTLET
(PERFORATIONS DOWN)
COMPOSITE DRAIN AND PROTECTION
BOARD (MIRADRAIN 6200XL EQUIVALENT)
PLACED ON DOWNSLOPE SIDE
NOT TO SCALE
PERIMETER FRENCH DRAIN DETAIL
Geotechnical & Environmental Sciences Consultants
8 1
0
8
8
2
2
0
1
3
D
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D
W
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D
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FIGURE 8
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE
CARLSBAD, CALIFORNIA
108822013 I 9/24
PIPE WITH A 1% GRADIENT TO A
8-INCH-DIAMETER PERFORATED
3 INCHES
OR MORE
48 INCHES
12 INCHES
SUITABLE OUTLET (PERFORATIONS DOWN)
3/4-INCH
COMPACTED FILL
CRUSHED ROCK
NON-WOVEN
GEOFABRIC
(MIRAFI 140-N
OR EQUIV.)
TOWARD ARTIFICIAL TURF FIELD
18 INCHES CEMENT-TREATED
SUBGRADE
2 FEET
NOT TO SCALE
CENTRAL FRENCH DRAIN DETAIL
Geotechnical & Environmental Sciences Consultants
9 1
0
8
8
2
2
0
1
3
D
-
C
F
D
.
D
W
G
J
D
L
FIGURE 9
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE
CARLSBAD, CALIFORNIA
108822013 I 9/24
3 INCHES
OR MORE
48 INCHES
3/4-INCH
COMPACTED FILL
CRUSHED ROCK
NON-WOVEN
GEOFABRIC
(MIRAFI 140-N
OR EQUIV.)
BENEATH ARTIFICAL TURF FIELD
18 INCHES CEMENT-TREATED
SUBGRADE
2 FEET8-INCH-DIAMETER PERFORATED PIPE WITH
A 1% GRADIENT TO A SUITABLE OUTLET
(PERFORATIONS DOWN)
NOT TO SCALE
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024
APPENDIX A
Boring Logs
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BORING LOG EXPLANATION SHEET
BORING LOG
20
!BORING lOG EXIPlANA l!ON ~[H[E[El
Geotechnical & Environmental Sciences Consultants
Soil Classification Chart Per ASTM D 2488
Primary Divisions Secondary Divisions
Group Symbol Group Name
COARSE-
GRAINED
SOILS
more than
50% retained
on No. 200
sieve
GRAVEL more than 50% of coarse fraction
retained on No. 4 sieve
CLEAN GRAVEL
less than 5% fines
GW well-graded GRAVEL
GP poorly graded GRAVEL
GRAVEL with DUAL CLASSIFICATIONS 5% to 12% fines
GW-GM well-graded GRAVEL with silt
GP-GM poorly graded GRAVEL with silt
GW-GC well-graded GRAVEL with clay
GP-GC poorly graded GRAVEL with clay
GRAVEL with FINES more than
12% fines
GM silty GRAVEL
GC clayey GRAVEL
GC-GM silty, clayey GRAVEL
SAND 50% or more of coarse fraction passes No. 4 sieve
CLEAN SAND less than 5% fines
SW well-graded SAND
SP poorly graded SAND
SAND with DUAL CLASSIFICATIONS 5% to 12% fines
SW-SM well-graded SAND with silt
SP-SM poorly graded SAND with silt
SW-SC well-graded SAND with clay
SP-SC poorly graded SAND with clay
SAND with FINES more than 12% fines
SM silty SAND
SC clayey SAND
SC-SM silty, clayey SAND
FINE-
GRAINED
SOILS
50% or
more passes
No. 200 sieve
SILT and CLAY
liquid limit less than 50%
INORGANIC
CL lean CLAY
ML SILT
CL-ML silty CLAY
ORGANIC OL (PI > 4)organic CLAY
OL (PI < 4)organic SILT
SILT and CLAY liquid limit 50% or more
INORGANIC CH fat CLAY
MH elastic SILT
ORGANIC
OH (plots on or above “A”-line)organic CLAY
OH (plots below “A”-line)organic SILT
Highly Organic Soils PT Peat
USCS METHOD OF SOIL CLASSIFICATION
Geotechnical & Environmental Sciences Consultants
Apparent Density - Coarse-Grained Soil
Apparent Density
Spooling Cable or Cathead Automatic Trip Hammer
SPT (blows/foot)
Modified Split Barrel (blows/foot)
SPT (blows/foot)
Modified Split Barrel (blows/foot)
Very Loose < 4 < 8 < 3 < 5
Loose 5 - 10 9 - 21 4 - 7 6 - 14
Medium
Dense 11 - 30 22 - 63 8 - 20 15 - 42
Dense 31 - 50 64 - 105 21 - 33 43 - 70
Very Dense > 50 > 105 > 33 > 70
Consistency - Fine-Grained Soil
Consis-tency
Spooling Cable or Cathead Automatic Trip Hammer
SPT (blows/foot)
Modified Split Barrel (blows/foot)
SPT (blows/foot)
Modified Split Barrel (blows/foot)
Very Soft < 2 < 3 < 1 < 2
Soft 2 - 4 3 - 5 1 - 3 2 - 3
Firm 5 - 8 6 - 10 4 - 5 4 - 6
Stiff 9 - 15 11 - 20 6 - 10 7 - 13
Very Stiff 16 - 30 21 - 39 11 - 20 14 - 26
Hard > 30 > 39 > 20 > 26
LIQUID LIMIT (LL), %
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20
30
40
50
60
70
0 20 30 40 50 60 70 80 90 100
MH or OH
ML or OLCL - ML
Plasticity Chart
Grain Size
Description Sieve Size Grain Size Approximate Size
Boulders > 12”> 12”Larger than basketball-sized
Cobbles 3 - 12”3 - 12”Fist-sized to basketball-sized
Gravel
Coarse 3/4 - 3”3/4 - 3”Thumb-sized to fist-sized
Fine #4 - 3/4”0.19 - 0.75”Pea-sized to thumb-sized
Sand
Coarse #10 - #4 0.079 - 0.19”Rock-salt-sized to
pea-sized
Medium #40 - #10 0.017 - 0.079”Sugar-sized to rock-salt-sized
Fine #200 - #40 0.0029 - 0.017”Flour-sized to sugar-sized
Fines Passing #200 < 0.0029”Flour-sized and smaller
CH or OH
CL or OL
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Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024
APPENDIX A
BORING LOGS
Field Procedure for the Collection of Disturbed Samples Disturbed soil samples were obtained in the field using the following methods.
Bulk Samples Bulk samples of representative earth materials were obtained from the exploratory borings.
The samples were bagged and transported to the laboratory for testing.
The Standard Penetration Test (SPT) Sampler Disturbed drive samples of earth materials were obtained by means of a Standard
Penetration Test sampler. The sampler is composed of a split barrel with an external diameter of 2 inches and an unlined internal diameter of 13/8 inches. The sampler was driven into the ground 12 to 18 inches with a 140-pound hammer free-falling from a height of 30 inches in
general accordance with ASTM D 1586. The blow counts were recorded for every 6 inches of penetration; the blow counts reported on the logs are those for the last 12 inches of penetration. Soil samples were observed and removed from the sampler, bagged, sealed and transported to the laboratory for testing.
Field Procedure for the Collection of Relatively Undisturbed Samples Relatively undisturbed soil samples were obtained in the field using the following method.
The Modified Split-Barrel Drive Sampler The sampler, with an external diameter of 3 inches, was lined with 1-inch long, thin brass rings with inside diameters of approximately 2.4 inches. The sample barrel was driven into the ground with the weight of a hammer in general accordance with ASTM D 3550. The driving weight was permitted to fall freely. The approximate length of the fall, the weight of the hammer, and the number of blows per foot of driving are presented on the boring logs as an index to the relative resistance of the materials sampled. The samples were removed from the sample barrel in the brass rings, sealed, and transported to the laboratory for testing.
0
5
10
15
20
16
15
14
23.5
22.6
21.9
19.7
22.5
19.8
19.2
107.4
108.6
CL
SC
ASPHALT CONCRETE:Approximately 7 inches thick.
FILL:Light brown, moist, soft, fine to medium sandy lean CLAY; trace blueish gray fine sandy silt
blebs.Dark gray to black, firm, organic odor.Brown, soft at 2 to 3 feet.
Dark gray to black at 3 feet; scattered subangular gravel and cobble up to 4 inches.
Firm to stiff.
Mottled with light brown and blueish gray clay.
ALLUVIUM:Gray to brown, moist to wet, medium dense, clayey fine to medium SAND.
Loose to medium dense; moist.
Light brown.
Wet.
Light brown and blueish gray; medium dense; mottled; scattered oxidized concretions.
Scattered laminae of clay and poorly graded sand.
Total Depth = 15 feet.
Seepage encountered at 5 feet. Groundwater encountered at 10 feet during drilling.
Piezometer/temporary monitoring well installed shortly after drilling on 11/9/2023.
Piezometer removed and the boring backfilled and sealed with approximately 5.3 cubic feet
of bentonite-cement grout on 1/12/2024.
Note: Periodic groundwater water measurements were performed and are summarized in
the report.
The ground elevation shown above is an estimation only. It is based on our interpretations
of published maps and other documents reviewed for the purposes of this evaluation. It is
not sufficiently accurate for preparing construction bids and design documents.
FIGURE A- 1
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE, CARLSBAD, CALIFORNIA
108822013 |9/24
DE
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DESCRIPTION/INTERPRETATION
DATE DRILLED 11/9/23 BORING NO.B-1
GROUND ELEVATION 274'(MSL)SHEET 1 OF
METHOD OF DRILLING 8" Diameter Hollow-Stem Auger (Baja Exploration)(LAR)
DRIVE WEIGHT 140 lbs. (Auto Trip)DROP 30"
SAMPLED BY KWK LOGGED BY KWK REVIEWED BY NMM
1
Geotechnical & Environmental Sciences Consultants
0
5
10
15
20
50/3"
25
21
5.9
17.6
16.6
15.3
17.9
22.2
19.5
20.1
101.3
107.0
109.5
GW
SC
SC
CL
SC
ASPHALT CONCRETE:Approximately 2-1/2 inches thick.
AGGREGATE BASE:Grayish brown, moist, medium dense, well graded GRAVEL; approximately 5 inches thick.
FILL:Light brown to light gray, moist, medium dense, clayey fine to medium SAND; iron oxide
staining. At 2 to 2-1/2 feet: black; organic odor.
Dark gray, scattered subrounded gravel starting at 3 feet; scattered cobbles at 4'.
ALLUVIUM:Light brown, moist, medium dense, clayey fine to medium SAND; scattered subrounded
cobbles; scattered blueish gray fine sand silt blebs.Medium dense to dense.
Light brown, moist, very stiff, fine to medium sandy lean CLAY.
Light brown and light gray; scattered rootlets.
Gray, moist, medium dense to dense, clayey SAND; scattered light brown fine sand lenses.
Total Depth = 15 feet.
Groundwater not encountered.
Piezometer/temporary monitoring well installed shortly after drilling on 11/9/2023.
Piezometer to be removed and the boring backfilled and sealed per DEHQ requirements at
later date.
Note: Periodic groundwater water measurements were performed and are summarized in
the report.
The ground elevation shown above is an estimation only. It is based on our interpretations
of published maps and other documents reviewed for the purposes of this evaluation. It is
not sufficiently accurate for preparing construction bids and design documents.
FIGURE A- 2
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE, CARLSBAD, CALIFORNIA
108822013 |9/24
DE
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f
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%
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(
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DESCRIPTION/INTERPRETATION
DATE DRILLED 11/9/23 BORING NO.B-2
GROUND ELEVATION 273'(MSL)SHEET 1 OF
METHOD OF DRILLING 8" Diameter Hollow-Stem Auger (Baja Exploration)(LAR)
DRIVE WEIGHT 140 lbs. (Auto Trip)DROP 30"
SAMPLED BY KWK LOGGED BY KWK REVIEWED BY NMM
1
Geotechnical & Environmental Sciences Consultants
0
5
10
15
20
21
19
28
17.5
12.917.8
19.0
23.0
21.9
17.9
17.3
21.6
17.4
102.5
100.0
105.9
SC
SP
SC
CL
SP
SC
SC
FILL:Dark brown, wet, loose to medium dense, clayey fine to medium SAND; scattered rootlets.Light brown, wet, medium dense, poorly graded SAND.Light brown and blueish gray, moist, loose to medium dense, clayey fine to medium SAND;
mottled yellow iron oxide staining.Black, moist, firm, fine sandy lean CLAY; organic odor.
At 1 foot, light brown.
Reddish yellow, moist, medium dense, poorly graded SAND.
Light brown and tan, moist, medium dense, clayey SAND; mottled; trace rounded gravel.
ALLUVIUM:Light brown and tan, moist, medium dense, clayey fine to medium SAND; mottled;
scattered iron oxide staining.Wet.
Total Depth = 15 feet.
Groundwater encountered at 10 feet during drilling.
Piezometer/temporary monitoring well installed shortly after drilling on 11/8/2023.
Piezometer to be removed and the boring backfilled and sealed per DEHQ requirements at
later date.
Note: Periodic groundwater water measurements were performed and are summarized in
the report.
The ground elevation shown above is an estimation only. It is based on our interpretations
of published maps and other documents reviewed for the purposes of this evaluation. It is
not sufficiently accurate for preparing construction bids and design documents.
FIGURE A- 3
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE, CARLSBAD, CALIFORNIA
108822013 |9/24
DE
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(
f
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)
Bu
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DESCRIPTION/INTERPRETATION
DATE DRILLED 11/8/23 BORING NO.B-3
GROUND ELEVATION 274'(MSL)SHEET 1 OF
METHOD OF DRILLING 8" Diameter Hollow-Stem Auger (Baja Exploration)(CME-75)
DRIVE WEIGHT 140 lbs. (Auto Trip)DROP 30"
SAMPLED BY KWK LOGGED BY KWK REVIEWED BY NMM
1
Geotechnical & Environmental Sciences Consultants
0
5
10
15
20
37
41
35
16.3
18.1
17.8
20.3
22.4
19.1
12.5
18.1
106.4
114.6
106.3
SC
CL
CL
FILL:Dark brown, moist, loose to medium dense, clayey fine to medium SAND; scattered
rootlets.
Yellowish brown, medium dense, scattered iron oxide staining.
Medium dense
Yellowish brown, moist, very stiff to hard, sandy lean CLAY.
Scattered zones of light gray silt.
ALLUVIUM:Light brown to yellowish brown, moist, hard, fine to medium sandy lean CLAY.
SANTIAGO FORMATION:White to light brown, moist, weakly cemented, clayey fine to medium-grained
SANDSTONE; mottled; iron oxide staining; trace gravel.
Total Depth = 15 feet.
Groundwater not encountered.
Piezometer/temporary monitoring well installed shortly after drilling on 11/9/2023.
Piezometer to be removed and the boring backfilled and sealed per DEHQ requirements at
later date.
Note: Periodic groundwater water measurements were performed and are summarized in
the report.
The ground elevation shown above is an estimation only. It is based on our interpretations
of published maps and other documents reviewed for the purposes of this evaluation. It is
not sufficiently accurate for preparing construction bids and design documents.
FIGURE A- 4
CARRILLO ELEMENTARY SCHOOL
2875 POINSETTIA LANE, CARLSBAD, CALIFORNIA
108822013 |9/24
DE
P
T
H
(
f
e
e
t
)
Bu
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SA
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BL
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%
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C
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S
.
DESCRIPTION/INTERPRETATION
DATE DRILLED 11/8/23 BORING NO.B-4
GROUND ELEVATION 273'(MSL)SHEET 1 OF
METHOD OF DRILLING 8" Diameter Hollow-Stem Auger (Baja Exploration)(CME-75)
DRIVE WEIGHT 140 lbs. (Auto Trip)DROP 30"
SAMPLED BY KWK LOGGED BY KWK REVIEWED BY NMM
1
Geotechnical & Environmental Sciences Consultants
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024
APPENDIX B
Geotechnical Laboratory Testing
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024
APPENDIX B
GEOTECHNICAL LABORATORY TESTING
Classification Soils were visually and texturally classified in accordance with the Unified Soil Classification System (USCS) in general accordance with ASTM D 2488. Soil classifications are indicated on the logs of the excavations in Attachment A.
In-Place Moisture and Density Tests The moisture content and dry density of relatively undisturbed samples obtained from the exploratory borings were evaluated in general accordance with ASTM D 2937. The test results
are presented on the logs of the exploratory borings in Appendix A.
200 Wash An evaluation of the percentage of particles finer than the No. 200 sieve in selected soil samples
was performed in general accordance with ASTM D 1140. The results of the tests are presented on Figure B-1.
Atterberg Limits Tests were performed on selected representative fine-grained soil samples to evaluate the liquid limit, plastic limit, and plasticity index in general accordance with ASTM D 4318. These test results were utilized to evaluate the soil classification in accordance with the USCS. The test results and classifications are shown on Figure B-2.
Soil Corrosivity Tests Soil pH and electrical resistivity tests were performed on representative samples in general accordance with California Test (CT) 643. The sulfate and chloride contents of the selected samples were evaluated in general accordance with CT 417 and CT 422, respectively. The test results are presented on Figure B-3.
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 1140
CL
SC
SC
SC
38
39
SC
98
95
SC
SC
40
SC43
100
92
100
97 46
17
98 44
SC
1.0-2.0
5.0-6.0
5.0-6.0
8.0-9.0
B-2
B-2
B-3
B-1
B-1
B-3 13.5-15.0
B-2
0.5-1.0B-3
49 SC
USCSSAMPLE
LOCATION
SAMPLE
DEPTH
(ft)
PERCENT
PASSING
NO. 200
PERCENT
PASSING
NO. 4
DESCRIPTION (TOTAL
SAMPLE)
99 47
7.0-8.0
13.5-15.0
5.0-6.0B-4 99
B-4 7.0-8.0
Clayey SAND
Clayey SAND
Clayey SAND
Clayey SAND
Clayey SAND
Clayey SAND
Clayey SAND
Clayey SAND
Clayey SAND
Sandy Lean CLAY 98 50
NO. 200 SIEVE ANALYSIS TEST RESULTS
CARRILLO ELEMENTARY SCHOOL 2875 POINSETTIA LANE, CARLSBAD, CALIFORNIA
108822 013 | 9/24
FIGURE B-1
108822013_200-WASHx9
l l l l
Geotechnical & Environmental Sciences Consultants
∆
X
+
◊
NP - INDICATES NON-PLASTIC
PERFORMED IN GENERAL ACCORDANCE WITH ASTM D 4318
CL CLB-4 7.0-8.0 33 21 12
SYMBOL LOCATION DEPTH (ft)LIQUID
LIMIT
PLASTIC
LIMIT
SC
SC
SC
CL
CL
CL
24
41
20 18
22 19
12
38
SC
SC
SC
CL SC
CL
36
14
CL
CL
SC
36
22
20
No. 40 Sieve)
14
22
7.0-8.0
13.5-15.0
PLASTICITY
INDEX
CLASSIFICATION
CL
2120
21
5.0-6.0 1333
USCS
B-2
1.5-2.0
B-1
41
B-3
8.0-9.0
USCS
(Fraction Finer Than
B-4 5.0-6.0
5.0-6.0
1.0-2.0
35
35
B-3
13B-1
B-2
B-2
CH or OH
CL or OL MH or OH
ML or OLCL -ML
0
10
20
30
40
50
60
0 10 20 30 40 50 60 70 80 90 100
PL
A
S
T
I
C
I
T
Y
I
N
D
E
X
,
P
I
LIQUID LIMIT, LL
FIGURE B-2
ATTERBERG LIMITS TEST RESULTS
CARRILLO ELEMENTARY SCHOOL2875 POINSETTIA LANE, CARLSBAD, CALIFORNIA
108822013_ATTERBERGx8
108822 013 | 9/24
•
■
0
□
Geotechnical & Environmental Sciences Consultants
1 PERFORMED IN GENERAL ACCORDANCE WITH CALIFORNIA TEST METHOD 643
2 PERFORMED IN GENERAL ACCORDANCE WITH CALIFORNIA TEST METHOD 417
3 PERFORMED IN GENERAL ACCORDANCE WITH CALIFORNIA TEST METHOD 422
(ppm)(%)
1,740
B-1 1.0-2.0
510B-4
CHLORIDE
CONTENT 3
(ppm)
pH 1SAMPLE
DEPTH (ft)
SAMPLE
LOCATION RESISTIVITY 1
(ohm-cm)
7.1 960
980
580 1,650 0.165
0.174
SULFATE CONTENT 2
1.0-1.5 7.0
CORROSIVITY TEST RESULTS
CARRILLO ELEMENTARY SCHOOL 2875 POINSETTIA LANE, CARLSBAD, CALIFORNIA
108822013 | 9/24
FIGURE B-3
10822013_CORROSIVITYx2
Geotechnical & Environmental Sciences Consultants
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024
APPENDIX C
Analytical Laboratory Testing
ANALYTICAL REPORT
PREPARED FOR
Attn: Mr. Nathan Diem
Ninyo & Moore
5710 Ruffin Road
San Diego, California 92123
Generated 12/5/2023 12:45:20 PM
JOB DESCRIPTION
SMUSD CARRILLO E.S.- WATER INTRUSION
JOB NUMBER
570-161528-1
See page two for job notes and contact information.
Tustin CA 92780
2841 Dow Avenue, Suite 100
Eurofins Calscience
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==~ eurofins
• nment Testing Env1ro
I
Eurofins Calscience
Eurofins Calscience is a laboratory within Eurofins Environment Testing Southwest, LLC, a company within Eurofins Environment Testing Group of Companies
Job Notes
This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the
samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this
page.
The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the
methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written
approval of the laboratory. All questions should be directed to the Eurofins Calscience Project Manager.
Authorization
Generated
12/5/2023 12:45:20 PM
Authorized for release by
Virendra Patel, Project Manager I
Virendra.Patel@et.eurofinsus.com
(714)895-5494
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Table of Contents
Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Laboratory Job ID: 570-161528-1
Page 3 of 28 Eurofins Calscience12/5/2023
Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Definitions/Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
QC Association Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Lab Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
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Definitions/Glossary
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Qualifiers
GC/MS VOA
Qualifier Description
*+LCS and/or LCSD is outside acceptance limits, high biased.
Qualifier
J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.
Glossary
These commonly used abbreviations may or may not be present in this report.
¤Listed under the "D" column to designate that the result is reported on a dry weight basis
Abbreviation
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level"
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Eurofins Calscience
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Case Narrative
Client: Ninyo & Moore Job ID: 570-161528-1
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Job ID: 570-161528-1
Laboratory: Eurofins Calscience
Narrative
Job Narrative
570-161528-1
Receipt
The sample was received on 11/17/2023 7:30 PM. Unless otherwise noted below, the sample arrived in good condition, and where
required, properly preserved and on ice. The temperature of the cooler at receipt was 2.9º C.
GC/MS VOA
Method 8260B: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with
analytical batch 570-387864. The laboratory control sample (LCS) was performed in duplicate (LCSD) to provide precision data for this
batch.
Method 8260B: The laboratory control sample (LCS) and laboratory control sample duplicate (LCSD) for analytical batch 570-387864
recovered outside control limits for the following analyte: Bromoform. This analyte was biased high in the LCS and was not detected in the
associated samples; therefore, the data have been reported.
Method 8260B: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with
analytical batch 570-387992. The laboratory control sample (LCS) was performed in duplicate (LCSD) to provide precision data for this
batch.
No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.
HPLC/IC
Method 300.0: The following sample was diluted due to the nature of the sample matrix: B-1 (570-161528-1). Elevated reporting limits
(RLs) are provided.
No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.
GC Semi VOA
No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.
Organic Prep
Method 1664A: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with
preparation batch 570-385437. The laboratory control sample (LCS) was performed in duplicate (LCSD) to provide precision data for this
batch.
Method 1664A.
Method 3510C: A portion of the following sample(s) was used for analysis, rather than testing the entire sample amount in the original
container, due to the sample container not being the appropriate size. As such, the required solvent rinse of the original container could
not be performed. B-1 (570-161528-1).
Method 3510C: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with
preparation batch 570-386429. The laboratory control sample (LCS) was performed in duplicate (LCSD) to provide precision data for this
batch.
Method 8015B_DRO
No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.
VOA Prep
No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.
Eurofins CalsciencePage 5 of 28 12/5/2023
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Detection Summary
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Client Sample ID: B-1 Lab Sample ID: 570-161528-1
cis-1,2-Dichloroethene
RL
1.0 ug/L
MDL
0.39
Analyte Result Qualifier Unit Dil Fac D Method Prep Type
Total/NA1J0.89 8260B
Naphthalene 10 ug/L4.9 Total/NA18.9 J 8260B
N-Propylbenzene 1.0 ug/L0.47 Total/NA10.71 J 8260B
Eurofins Calscience
This Detection Summary does not include radiochemical test results.
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1--------------- -----
L ■
Client Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: SW846 8260B - Volatile Organic Compounds (GC/MS)
Lab Sample ID: 570-161528-1Client Sample ID: B-1
Matrix: WaterDate Collected: 11/17/23 09:58
Date Received: 11/17/23 19:30
RL MDL
ND 2.0 0.36 ug/L 11/30/23 00:54 1
Analyte Dil FacAnalyzedPreparedUnitDResultQualifier
1,1,1,2-Tetrachloroethane
1.0 0.36 ug/L 11/30/23 00:54 1ND1,1,1-Trichloroethane
1.0 0.31 ug/L 11/30/23 00:54 1ND1,1,2,2-Tetrachloroethane
10 2.5 ug/L 11/30/23 00:54 1ND1,1,2-Trichloro-1,2,2-trifluoroethane
1.0 0.30 ug/L 11/30/23 00:54 1ND1,1,2-Trichloroethane
1.0 0.34 ug/L 11/30/23 00:54 1ND1,1-Dichloroethane
1.0 0.42 ug/L 11/30/23 00:54 1ND1,1-Dichloroethene
1.0 0.41 ug/L 11/30/23 00:54 1ND1,1-Dichloropropene
1.0 0.59 ug/L 11/30/23 00:54 1ND1,2,3-Trichlorobenzene
5.0 0.42 ug/L 11/30/23 00:54 1ND1,2,3-Trichloropropane
1.0 0.71 ug/L 11/30/23 00:54 1ND1,2,4-Trichlorobenzene
1.0 0.34 ug/L 11/30/23 00:54 1ND1,2,4-Trimethylbenzene
10 2.1 ug/L 11/30/23 00:54 1ND1,2-Dibromo-3-Chloropropane
1.0 0.41 ug/L 11/30/23 00:54 1ND1,2-Dibromoethane
1.0 0.26 ug/L 11/30/23 00:54 1ND1,2-Dichlorobenzene
0.50 0.25 ug/L 11/30/23 00:54 1ND1,2-Dichloroethane
1.0 0.42 ug/L 11/30/23 00:54 1ND1,2-Dichloropropane
1.0 0.50 ug/L 11/30/23 00:54 1ND1,3,5-Trimethylbenzene
1.0 0.26 ug/L 11/30/23 00:54 1ND1,3-Dichlorobenzene
1.0 0.32 ug/L 11/30/23 00:54 1ND1,3-Dichloropropane
1.0 0.28 ug/L 11/30/23 00:54 1ND1,4-Dichlorobenzene
1.0 0.50 ug/L 11/30/23 00:54 1ND2,2-Dichloropropane
10 4.5 ug/L 11/30/23 00:54 1ND2-Butanone
1.0 0.33 ug/L 11/30/23 00:54 1ND2-Chlorotoluene
10 2.7 ug/L 11/30/23 00:54 1ND2-Hexanone
1.0 0.35 ug/L 11/30/23 00:54 1ND4-Chlorotoluene
10 3.2 ug/L 11/30/23 00:54 1ND4-Methyl-2-pentanone
10 7.4 ug/L 11/30/23 00:54 1NDAcetone
1.0 0.29 ug/L 11/30/23 00:54 1NDBromobenzene
2.0 0.38 ug/L 11/30/23 00:54 1NDBromochloromethane
1.0 0.29 ug/L 11/30/23 00:54 1NDBromodichloromethane
5.0 1.9 ug/L 11/30/23 00:54 1ND*+Bromoform
25 7.4 ug/L 11/30/23 00:54 1NDBromomethane
1.0 0.39 ug/L 11/30/23 00:54 10.89 Jcis-1,2-Dichloroethene
0.50 0.26 ug/L 11/30/23 00:54 1NDcis-1,3-Dichloropropene
10 0.42 ug/L 11/30/23 00:54 1NDCarbon disulfide
0.50 0.37 ug/L 11/30/23 00:54 1NDCarbon tetrachloride
1.0 0.26 ug/L 11/30/23 00:54 1NDChlorobenzene
5.0 1.9 ug/L 11/30/23 00:54 1NDChloroethane
1.0 0.32 ug/L 11/30/23 00:54 1NDChloroform
10 2.2 ug/L 11/30/23 00:54 1NDChloromethane
2.0 0.37 ug/L 11/30/23 00:54 1NDDibromochloromethane
1.0 0.33 ug/L 11/30/23 00:54 1NDDibromomethane
5.0 0.62 ug/L 11/30/23 00:54 1NDDichlorodifluoromethane
2.0 0.33 ug/L 11/30/23 00:54 1NDDi-isopropyl ether (DIPE)
100 52 ug/L 11/30/23 00:54 1NDEthanol
2.0 0.35 ug/L 11/30/23 00:54 1NDEthyl-t-butyl ether (ETBE)
1.0 0.41 ug/L 11/30/23 00:54 1NDIsopropylbenzene
10 3.0 ug/L 11/30/23 00:54 1NDMethylene Chloride
Eurofins Calscience
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Client Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued)
Lab Sample ID: 570-161528-1Client Sample ID: B-1
Matrix: WaterDate Collected: 11/17/23 09:58
Date Received: 11/17/23 19:30
RL MDL
ND 1.0 0.30 ug/L 11/30/23 00:54 1
Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier
Methyl-t-Butyl Ether (MTBE)
10 4.9 ug/L 11/30/23 00:54 18.9 JNaphthalene
1.0 0.53 ug/L 11/30/23 00:54 1NDn-Butylbenzene
1.0 0.47 ug/L 11/30/23 00:54 10.71 JN-Propylbenzene
1.0 0.27 ug/L 11/30/23 00:54 1NDo-Xylene
2.0 0.49 ug/L 11/30/23 00:54 1NDm,p-Xylene
1.0 0.47 ug/L 11/30/23 00:54 1NDp-Isopropyltoluene
1.0 0.37 ug/L 11/30/23 00:54 1NDsec-Butylbenzene
1.0 0.38 ug/L 11/30/23 00:54 1NDStyrene
1.0 0.42 ug/L 11/30/23 00:54 1NDtrans-1,2-Dichloroethene
0.50 0.31 ug/L 11/30/23 00:54 1NDtrans-1,3-Dichloropropene
2.0 0.39 ug/L 11/30/23 00:54 1NDTert-amyl-methyl ether (TAME)
10 2.7 ug/L 11/30/23 00:54 1NDtert-Butyl alcohol (TBA)
1.0 0.38 ug/L 11/30/23 00:54 1NDtert-Butylbenzene
1.0 0.40 ug/L 11/30/23 00:54 1NDTetrachloroethene
1.0 0.30 ug/L 11/30/23 00:54 1NDToluene
1.0 0.39 ug/L 11/30/23 00:54 1NDTrichloroethene
10 0.75 ug/L 11/30/23 00:54 1NDTrichlorofluoromethane
10 5.0 ug/L 11/30/23 00:54 1NDVinyl acetate
0.50 0.43 ug/L 11/30/23 00:54 1NDVinyl chloride
1,2-Dichloroethane-d4 (Surr)109 70-123 11/30/23 00:54 1
Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery
4-Bromofluorobenzene (Surr)106 11/30/23 00:54 180-120
Dibromofluoromethane (Surr)110 11/30/23 00:54 178-120
Toluene-d8 (Surr)96 11/30/23 00:54 180-120
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Client Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) - RA
Lab Sample ID: 570-161528-1Client Sample ID: B-1
Matrix: WaterDate Collected: 11/17/23 09:58
Date Received: 11/17/23 19:30
RL MDL
ND 0.50 0.24 ug/L 11/30/23 16:34 1
Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier
Benzene
1.0 0.30 ug/L 11/30/23 16:34 1NDEthylbenzene
1,2-Dichloroethane-d4 (Surr)116 70-123 11/30/23 16:34 1
Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery
4-Bromofluorobenzene (Surr)98 11/30/23 16:34 180-120
Dibromofluoromethane (Surr)106 11/30/23 16:34 178-120
Toluene-d8 (Surr)101 11/30/23 16:34 180-120
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Client Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: SW846 8015B - Diesel Range Organics (DRO) (GC)
Lab Sample ID: 570-161528-1Client Sample ID: B-1
Matrix: WaterDate Collected: 11/17/23 09:58
Date Received: 11/17/23 19:30
RL MDL
ND 50 36 ug/L 11/22/23 13:43 12/04/23 18:32 1
Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier
Diesel Range Organics [C10-C28]
250 66 ug/L 11/22/23 13:43 12/04/23 18:32 1NDTPH as Motor Oil (C17-C44)
n-Octacosane (Surr)119 53-151 11/22/23 13:43 12/04/23 18:32 1
Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery
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Client Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: EPA 300.0 - Anions, Ion Chromatography
Lab Sample ID: 570-161528-1Client Sample ID: B-1
Matrix: WaterDate Collected: 11/17/23 09:58
Date Received: 11/17/23 19:30
RL MDL
ND 0.20 0.086 mg/L 11/18/23 10:03 2
Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier
Nitrite as N
0.20 0.039 mg/L 11/18/23 10:03 2NDNitrate as N
Eurofins Calscience
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Client Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
General Chemistry
Lab Sample ID: 570-161528-1Client Sample ID: B-1
Matrix: WaterDate Collected: 11/17/23 09:58
Date Received: 11/17/23 19:30
RL MDL
ND 0.979 0.500 mg/L 11/20/23 11:09 11/20/23 13:27 1
Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier
HEM: Oil and Grease (1664A)
Eurofins Calscience
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Surrogate Summary
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS)
Prep Type: Total/NAMatrix: Water
Lab Sample ID Client Sample ID (70-123) (80-120) (78-120) (80-120)
DCA BFB DBFM TOL
109 106 110 96570-161528-1
Percent Surrogate Recovery (Acceptance Limits)
B-1
116 98 106 101570-161528-1 - RA B-1
97 100 98 99LCS 570-387864/4 Lab Control Sample
109 110 106 101LCS 570-387992/4 Lab Control Sample
100 99 101 95LCSD 570-387864/5 Lab Control Sample Dup
108 108 104 101LCSD 570-387992/5 Lab Control Sample Dup
108 92 104 100MB 570-387864/8 Method Blank
105 99 103 102MB 570-387992/8 Method Blank
Surrogate Legend
DCA = 1,2-Dichloroethane-d4 (Surr)
BFB = 4-Bromofluorobenzene (Surr)
DBFM = Dibromofluoromethane (Surr)
TOL = Toluene-d8 (Surr)
Method: 8015B - Diesel Range Organics (DRO) (GC)
Prep Type: Total/NAMatrix: Water
Lab Sample ID Client Sample ID (53-151)
OTCSN1
119570-161528-1
Percent Surrogate Recovery (Acceptance Limits)
B-1
103LCS 570-386429/2-A Lab Control Sample
105LCS 570-386429/4-A Lab Control Sample
106LCSD 570-386429/3-A Lab Control Sample Dup
111LCSD 570-386429/5-A Lab Control Sample Dup
105MB 570-386429/1-A Method Blank
Surrogate Legend
OTCSN = n-Octacosane (Surr)
Eurofins Calscience
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QC Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS)
Client Sample ID: Method BlankLab Sample ID: MB 570-387864/8
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387864
RL MDL
1,1,1,2-Tetrachloroethane ND 2.0 0.36 ug/L 11/29/23 21:54 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.361.0 ug/L 11/29/23 21:54 11,1,1-Trichloroethane
ND 0.311.0 ug/L 11/29/23 21:54 11,1,2,2-Tetrachloroethane
ND 2.510 ug/L 11/29/23 21:54 11,1,2-Trichloro-1,2,2-trifluoroethane
ND 0.301.0 ug/L 11/29/23 21:54 11,1,2-Trichloroethane
ND 0.341.0 ug/L 11/29/23 21:54 11,1-Dichloroethane
ND 0.421.0 ug/L 11/29/23 21:54 11,1-Dichloroethene
ND 0.411.0 ug/L 11/29/23 21:54 11,1-Dichloropropene
ND 0.591.0 ug/L 11/29/23 21:54 11,2,3-Trichlorobenzene
ND 0.425.0 ug/L 11/29/23 21:54 11,2,3-Trichloropropane
ND 0.711.0 ug/L 11/29/23 21:54 11,2,4-Trichlorobenzene
ND 0.341.0 ug/L 11/29/23 21:54 11,2,4-Trimethylbenzene
ND 2.110 ug/L 11/29/23 21:54 11,2-Dibromo-3-Chloropropane
ND 0.411.0 ug/L 11/29/23 21:54 11,2-Dibromoethane
ND 0.261.0 ug/L 11/29/23 21:54 11,2-Dichlorobenzene
ND 0.250.50 ug/L 11/29/23 21:54 11,2-Dichloroethane
ND 0.421.0 ug/L 11/29/23 21:54 11,2-Dichloropropane
ND 0.501.0 ug/L 11/29/23 21:54 11,3,5-Trimethylbenzene
ND 0.261.0 ug/L 11/29/23 21:54 11,3-Dichlorobenzene
ND 0.321.0 ug/L 11/29/23 21:54 11,3-Dichloropropane
ND 0.281.0 ug/L 11/29/23 21:54 11,4-Dichlorobenzene
ND 0.501.0 ug/L 11/29/23 21:54 12,2-Dichloropropane
ND 4.510 ug/L 11/29/23 21:54 12-Butanone
ND 0.331.0 ug/L 11/29/23 21:54 12-Chlorotoluene
ND 2.710 ug/L 11/29/23 21:54 12-Hexanone
ND 0.351.0 ug/L 11/29/23 21:54 14-Chlorotoluene
ND 3.210 ug/L 11/29/23 21:54 14-Methyl-2-pentanone
ND 7.410 ug/L 11/29/23 21:54 1Acetone
ND 0.240.50 ug/L 11/29/23 21:54 1Benzene
ND 0.291.0 ug/L 11/29/23 21:54 1Bromobenzene
ND 0.382.0 ug/L 11/29/23 21:54 1Bromochloromethane
ND 0.291.0 ug/L 11/29/23 21:54 1Bromodichloromethane
ND 1.95.0 ug/L 11/29/23 21:54 1Bromoform
ND 7.425 ug/L 11/29/23 21:54 1Bromomethane
ND 0.391.0 ug/L 11/29/23 21:54 1cis-1,2-Dichloroethene
ND 0.260.50 ug/L 11/29/23 21:54 1cis-1,3-Dichloropropene
ND 0.4210 ug/L 11/29/23 21:54 1Carbon disulfide
ND 0.370.50 ug/L 11/29/23 21:54 1Carbon tetrachloride
ND 0.261.0 ug/L 11/29/23 21:54 1Chlorobenzene
ND 1.95.0 ug/L 11/29/23 21:54 1Chloroethane
ND 0.321.0 ug/L 11/29/23 21:54 1Chloroform
ND 2.210 ug/L 11/29/23 21:54 1Chloromethane
ND 0.372.0 ug/L 11/29/23 21:54 1Dibromochloromethane
ND 0.331.0 ug/L 11/29/23 21:54 1Dibromomethane
ND 0.625.0 ug/L 11/29/23 21:54 1Dichlorodifluoromethane
ND 0.332.0 ug/L 11/29/23 21:54 1Di-isopropyl ether (DIPE)
ND 52100 ug/L 11/29/23 21:54 1Ethanol
ND 0.301.0 ug/L 11/29/23 21:54 1Ethylbenzene
Eurofins Calscience
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QC Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)
Client Sample ID: Method BlankLab Sample ID: MB 570-387864/8
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387864
RL MDL
Ethyl-t-butyl ether (ETBE)ND 2.0 0.35 ug/L 11/29/23 21:54 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.411.0 ug/L 11/29/23 21:54 1Isopropylbenzene
ND 3.010 ug/L 11/29/23 21:54 1Methylene Chloride
ND 0.301.0 ug/L 11/29/23 21:54 1Methyl-t-Butyl Ether (MTBE)
ND 4.910 ug/L 11/29/23 21:54 1Naphthalene
ND 0.531.0 ug/L 11/29/23 21:54 1n-Butylbenzene
ND 0.471.0 ug/L 11/29/23 21:54 1N-Propylbenzene
ND 0.271.0 ug/L 11/29/23 21:54 1o-Xylene
ND 0.492.0 ug/L 11/29/23 21:54 1m,p-Xylene
ND 0.471.0 ug/L 11/29/23 21:54 1p-Isopropyltoluene
ND 0.371.0 ug/L 11/29/23 21:54 1sec-Butylbenzene
ND 0.381.0 ug/L 11/29/23 21:54 1Styrene
ND 0.421.0 ug/L 11/29/23 21:54 1trans-1,2-Dichloroethene
ND 0.310.50 ug/L 11/29/23 21:54 1trans-1,3-Dichloropropene
ND 0.392.0 ug/L 11/29/23 21:54 1Tert-amyl-methyl ether (TAME)
ND 2.710 ug/L 11/29/23 21:54 1tert-Butyl alcohol (TBA)
ND 0.381.0 ug/L 11/29/23 21:54 1tert-Butylbenzene
ND 0.401.0 ug/L 11/29/23 21:54 1Tetrachloroethene
ND 0.301.0 ug/L 11/29/23 21:54 1Toluene
ND 0.391.0 ug/L 11/29/23 21:54 1Trichloroethene
ND 0.7510 ug/L 11/29/23 21:54 1Trichlorofluoromethane
ND 5.010 ug/L 11/29/23 21:54 1Vinyl acetate
ND 0.430.50 ug/L 11/29/23 21:54 1Vinyl chloride
1,2-Dichloroethane-d4 (Surr)108 70-123 11/29/23 21:54 1
MB MB
Surrogate Dil FacPrepared AnalyzedQualifier Limits%Recovery
92 11/29/23 21:54 14-Bromofluorobenzene (Surr)80-120
104 11/29/23 21:54 1Dibromofluoromethane (Surr)78-120
100 11/29/23 21:54 1Toluene-d8 (Surr)80-120
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-387864/4
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387864
1,1-Dichloroethene 20.0 18.01 ug/L 90 80-133
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
1,2-Dibromoethane 20.0 19.82 ug/L 99 80-120
1,2-Dichlorobenzene 20.0 20.83 ug/L 104 80-121
1,2-Dichloroethane 20.0 20.33 ug/L 102 77-122
Benzene 20.0 17.85 ug/L 89 80-121
Carbon tetrachloride 20.0 21.54 ug/L 108 71-137
Chlorobenzene 20.0 18.99 ug/L 95 80-120
Di-isopropyl ether (DIPE)20.0 15.88 ug/L 79 75-134
Ethanol 200 242.1 ug/L 121 50-168
Ethylbenzene 20.0 18.24 ug/L 91 80-121
Ethyl-t-butyl ether (ETBE)20.0 16.03 ug/L 80 80-124
Methyl-t-Butyl Ether (MTBE)20.0 17.46 ug/L 87 78-123
o-Xylene 20.0 18.60 ug/L 93 80-122
Eurofins Calscience
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QC Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-387864/4
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387864
m,p-Xylene 40.0 37.48 ug/L 94 80-123
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
1,2-Dichloroethane-d4 (Surr)70 -123
Surrogate
97
LCS LCS
Qualifier Limits%Recovery
1004-Bromofluorobenzene (Surr)80 -120
98Dibromofluoromethane (Surr)78 -120
99Toluene-d8 (Surr)80 -120
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-387864/5
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387864
1,1-Dichloroethene 20.0 18.95 ug/L 95 80-133 5 20
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
1,2-Dibromoethane 20.0 19.94 ug/L 100 80-120 1 20
1,2-Dichlorobenzene 20.0 20.70 ug/L 104 80-121 1 20
1,2-Dichloroethane 20.0 20.02 ug/L 100 77-122 2 20
Benzene 20.0 17.52 ug/L 88 80-121 2 20
Carbon tetrachloride 20.0 21.18 ug/L 106 71-137 2 20
Chlorobenzene 20.0 19.39 ug/L 97 80-120 2 20
Di-isopropyl ether (DIPE)20.0 15.84 ug/L 79 75-134 0 20
Ethanol 200 198.0 ug/L 99 50-168 20 29
Ethylbenzene 20.0 18.67 ug/L 93 80-121 2 20
Ethyl-t-butyl ether (ETBE)20.0 18.66 ug/L 93 80-124 15 20
Methyl-t-Butyl Ether (MTBE)20.0 19.02 ug/L 95 78-123 9 20
o-Xylene 20.0 19.03 ug/L 95 80-122 2 20
m,p-Xylene 40.0 36.95 ug/L 92 80-123 1 20
1,2-Dichloroethane-d4 (Surr)70 -123
Surrogate
100
LCSD LCSD
Qualifier Limits%Recovery
994-Bromofluorobenzene (Surr)80 -120
101Dibromofluoromethane (Surr)78 -120
95Toluene-d8 (Surr)80 -120
Client Sample ID: Method BlankLab Sample ID: MB 570-387992/8
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387992
RL MDL
Benzene ND 0.50 0.24 ug/L 11/30/23 09:49 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
1,2-Dichloroethane-d4 (Surr)105 70-123 11/30/23 09:49 1
MB MB
Surrogate Dil FacPrepared AnalyzedQualifier Limits%Recovery
99 11/30/23 09:49 14-Bromofluorobenzene (Surr)80-120
103 11/30/23 09:49 1Dibromofluoromethane (Surr)78-120
102 11/30/23 09:49 1Toluene-d8 (Surr)80-120
Eurofins Calscience
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QC Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-387992/4
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387992
Benzene 20.0 20.38 ug/L 102 80-121
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
1,2-Dichloroethane-d4 (Surr)70 -123
Surrogate
109
LCS LCS
Qualifier Limits%Recovery
1104-Bromofluorobenzene (Surr)80 -120
106Dibromofluoromethane (Surr)78 -120
101Toluene-d8 (Surr)80 -120
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-387992/5
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387992
Benzene 20.0 20.91 ug/L 105 80-121 3 20
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
1,2-Dichloroethane-d4 (Surr)70 -123
Surrogate
108
LCSD LCSD
Qualifier Limits%Recovery
1084-Bromofluorobenzene (Surr)80 -120
104Dibromofluoromethane (Surr)78 -120
101Toluene-d8 (Surr)80 -120
Method: 8015B - Diesel Range Organics (DRO) (GC)
Client Sample ID: Method BlankLab Sample ID: MB 570-386429/1-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387908 Prep Batch: 386429
RL MDL
Diesel Range Organics [C10-C28]ND 50 36 ug/L 11/22/23 13:43 11/29/23 21:49 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 66250 ug/L 11/22/23 13:43 11/29/23 21:49 1TPH as Motor Oil (C17-C44)
n-Octacosane (Surr)105 53-151 11/29/23 21:49 1
MB MB
Surrogate
11/22/23 13:43
Dil FacPrepared AnalyzedQualifier Limits%Recovery
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-386429/2-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387908 Prep Batch: 386429
Diesel Range Organics
[C10-C28]
4000 3432 ug/L 86 65-129
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
n-Octacosane (Surr)53 -151
Surrogate
103
LCS LCS
Qualifier Limits%Recovery
Eurofins Calscience
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QC Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: 8015B - Diesel Range Organics (DRO) (GC) (Continued)
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-386429/4-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387908 Prep Batch: 386429
TPH as Motor Oil (C17-C44)4000 3452 ug/L 86 57-137
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
n-Octacosane (Surr)53 -151
Surrogate
105
LCS LCS
Qualifier Limits%Recovery
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-386429/3-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387908 Prep Batch: 386429
Diesel Range Organics
[C10-C28]
4000 3503 ug/L 88 65-129 2 30
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
n-Octacosane (Surr)53 -151
Surrogate
106
LCSD LCSD
Qualifier Limits%Recovery
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-386429/5-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 387908 Prep Batch: 386429
TPH as Motor Oil (C17-C44)4000 3439 ug/L 86 57-137 0 20
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
n-Octacosane (Surr)53 -151
Surrogate
111
LCSD LCSD
Qualifier Limits%Recovery
Method: 300.0 - Anions, Ion Chromatography
Client Sample ID: Method BlankLab Sample ID: MB 570-385054/5
Matrix: Water Prep Type: Total/NA
Analysis Batch: 385054
RL MDL
Nitrite as N ND 0.10 0.043 mg/L 11/18/23 04:31 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.0200.10 mg/L 11/18/23 04:31 1Nitrate as N
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-385054/6
Matrix: Water Prep Type: Total/NA
Analysis Batch: 385054
Nitrite as N 2.50 2.638 mg/L 106 90-110
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
Nitrate as N 5.00 5.090 mg/L 102 90-110
Eurofins Calscience
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QC Sample Results
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method: 300.0 - Anions, Ion Chromatography (Continued)
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-385054/7
Matrix: Water Prep Type: Total/NA
Analysis Batch: 385054
Nitrite as N 2.50 2.647 mg/L 106 90-110 0 15
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
Nitrate as N 5.00 5.041 mg/L 101 90-110 1 15
Client Sample ID: Matrix SpikeLab Sample ID: 570-161518-H-2 MS
Matrix: Water Prep Type: Total/NA
Analysis Batch: 385054
Nitrite as N ND 2.50 2.954 mg/L 118 80-120
Analyte
MS MS
DUnitResult Qualifier %Rec
Spike
Added
Sample
Result
Sample
Qualifier
%Rec
Limits
Nitrate as N ND 5.00 4.877 mg/L 98 80-120
Client Sample ID: Matrix Spike DuplicateLab Sample ID: 570-161518-H-2 MSD
Matrix: Water Prep Type: Total/NA
Analysis Batch: 385054
Nitrite as N ND 2.50 2.863 mg/L 115 80-120 3 20
Analyte
MSD MSD
DUnitResult Qualifier %Rec
Spike
Added
Sample
Result
Sample
Qualifier
%Rec
Limits LimitRPD
RPD
Nitrate as N ND 5.00 4.879 mg/L 98 80-120 0 20
Method: 1664A - HEM and SGT-HEM
Client Sample ID: Method BlankLab Sample ID: MB 570-385437/1-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 385531 Prep Batch: 385437
RL MDL
HEM: Oil and Grease ND 1.00 0.510 mg/L 11/20/23 11:09 11/20/23 13:27 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-385437/2-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 385531 Prep Batch: 385437
HEM: Oil and Grease 40.0 31.90 mg/L 80 78-114
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-385437/3-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 385531 Prep Batch: 385437
HEM: Oil and Grease 40.0 31.10 mg/L 78 78-114 3 18
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
Eurofins Calscience
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QC Association Summary
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
GC/MS VOA
Analysis Batch: 387864
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 8260B570-161528-1 B-1 Total/NA
Water 8260BMB 570-387864/8 Method Blank Total/NA
Water 8260BLCS 570-387864/4 Lab Control Sample Total/NA
Water 8260BLCSD 570-387864/5 Lab Control Sample Dup Total/NA
Analysis Batch: 387992
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 8260B570-161528-1 - RA B-1 Total/NA
Water 8260BMB 570-387992/8 Method Blank Total/NA
Water 8260BLCS 570-387992/4 Lab Control Sample Total/NA
Water 8260BLCSD 570-387992/5 Lab Control Sample Dup Total/NA
GC Semi VOA
Prep Batch: 386429
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 3510C570-161528-1 B-1 Total/NA
Water 3510CMB 570-386429/1-A Method Blank Total/NA
Water 3510CLCS 570-386429/2-A Lab Control Sample Total/NA
Water 3510CLCS 570-386429/4-A Lab Control Sample Total/NA
Water 3510CLCSD 570-386429/3-A Lab Control Sample Dup Total/NA
Water 3510CLCSD 570-386429/5-A Lab Control Sample Dup Total/NA
Analysis Batch: 387908
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 8015B 386429MB 570-386429/1-A Method Blank Total/NA
Water 8015B 386429LCS 570-386429/2-A Lab Control Sample Total/NA
Water 8015B 386429LCS 570-386429/4-A Lab Control Sample Total/NA
Water 8015B 386429LCSD 570-386429/3-A Lab Control Sample Dup Total/NA
Water 8015B 386429LCSD 570-386429/5-A Lab Control Sample Dup Total/NA
Analysis Batch: 388921
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 8015B 386429570-161528-1 B-1 Total/NA
HPLC/IC
Analysis Batch: 385054
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 300.0570-161528-1 B-1 Total/NA
Water 300.0MB 570-385054/5 Method Blank Total/NA
Water 300.0LCS 570-385054/6 Lab Control Sample Total/NA
Water 300.0LCSD 570-385054/7 Lab Control Sample Dup Total/NA
Water 300.0570-161518-H-2 MS Matrix Spike Total/NA
Water 300.0570-161518-H-2 MSD Matrix Spike Duplicate Total/NA
General Chemistry
Prep Batch: 385437
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 1664A570-161528-1 B-1 Total/NA
Water 1664AMB 570-385437/1-A Method Blank Total/NA
Eurofins Calscience
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QC Association Summary
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
General Chemistry (Continued)
Prep Batch: 385437 (Continued)
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 1664ALCS 570-385437/2-A Lab Control Sample Total/NA
Water 1664ALCSD 570-385437/3-A Lab Control Sample Dup Total/NA
Analysis Batch: 385531
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 1664A 385437570-161528-1 B-1 Total/NA
Water 1664A 385437MB 570-385437/1-A Method Blank Total/NA
Water 1664A 385437LCS 570-385437/2-A Lab Control Sample Total/NA
Water 1664A 385437LCSD 570-385437/3-A Lab Control Sample Dup Total/NA
Eurofins Calscience
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L , ___________ _
L ■
Lab Chronicle
Client: Ninyo & Moore Job ID: 570-161528-1
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Client Sample ID: B-1 Lab Sample ID: 570-161528-1
Matrix: WaterDate Collected: 11/17/23 09:58
Date Received: 11/17/23 19:30
Analysis 8260B CG11/30/23 00:541 EET CAL 4387864
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Instrument ID: GCMSZ
Analysis 8260B RA 1 387992 11/30/23 16:34 UJHB EET CAL 4Total/NA 5 mL 5 mL
GCMSZInstrument ID:
Prep 3510C 386429 11/22/23 13:43 TR8L EET CAL 4Total/NA 250 mL 2.5 mL
Analysis 8015B 1 388921 12/04/23 18:32 SP9M EET CAL 4Total/NA 10 mL 10 mL
GC50Instrument ID:
Analysis 300.0 2 385054 11/18/23 10:03 YO8L EET CAL 4Total/NA 4 mL 4 mL
IC9Instrument ID:
Prep 1664A 385437 11/20/23 11:09 UWEZ EET CAL 4Total/NA 1021 mL 1000 mL
Analysis 1664A 1 385531 11/20/23 13:27 VB5S EET CAL 4Total/NA
NO EQUIQInstrument ID:
Laboratory References:
EET CAL 4 = Eurofins Calscience Tustin, 2841 Dow Avenue, Tustin, CA 92780, TEL (714)895-5494
Eurofins Calscience
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Accreditation/Certification Summary
Client: Ninyo & Moore Job ID: 570-161528-1
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Laboratory: Eurofins Calscience
Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.
Authority Program Identification Number Expiration Date
California State 3082 07-31-24
The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes
for which the agency does not offer certification.
Analysis Method Prep Method Matrix Analyte
300.0 Water Nitrate as N
300.0 Water Nitrite as N
8260B Water 1,1,2-Trichloro-1,2,2-trifluoroethane
8260B Water 1,1-Dichloropropene
8260B Water 1,2,3-Trichlorobenzene
8260B Water 1,2,4-Trimethylbenzene
8260B Water 1,3,5-Trimethylbenzene
8260B Water 1,3-Dichloropropane
8260B Water 2,2-Dichloropropane
8260B Water 2-Butanone
8260B Water 2-Chlorotoluene
8260B Water 2-Hexanone
8260B Water Acetone
8260B Water Ethanol
8260B Water Isopropylbenzene
8260B Water p-Isopropyltoluene
8260B Water Vinyl acetate
Oregon NELAP 4175 02-02-24
Eurofins Calscience
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Method Summary
Job ID: 570-161528-1Client: Ninyo & Moore
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Method Method Description LaboratoryProtocol
SW8468260BVolatile Organic Compounds (GC/MS)EET CAL 4
SW8468015BDiesel Range Organics (DRO) (GC)EET CAL 4
EPA300.0 Anions, Ion Chromatography EET CAL 4
1664A1664AHEM and SGT-HEM EET CAL 4
1664A1664AHEM and SGT-HEM (Aqueous)EET CAL 4
SW8463510CLiquid-Liquid Extraction (Separatory Funnel)EET CAL 4
SW8465030CPurge and Trap EET CAL 4
Protocol References:
1664A = EPA-821-98-002
EPA = US Environmental Protection Agency
SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates.
Laboratory References:
EET CAL 4 = Eurofins Calscience Tustin, 2841 Dow Avenue, Tustin, CA 92780, TEL (714)895-5494
Eurofins Calscience
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Sample Summary
Client: Ninyo & Moore Job ID: 570-161528-1
Project/Site: SMUSD CARRILLO E.S.- WATER INTRUSION
Lab Sample ID Client Sample ID Matrix Collected Received
570-161528-1 B-1 Water 11/17/23 09:58 11/17/23 19:30
Eurofins CalsciencePage 25 of 28 12/5/2023
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123456789101112131415
• eur
7440 Lincoln Way, Garden Grove, CA 92841-1427 • (714) 895-5494
For courier service/ samole drop off information, contact us26 sales@eurofinsus.com or call us.
LABORATORY CLIENT:
Ninyo & Moore
ADDRESS:
5710 Ruffin Road
CITY: STATE: ZIP:
San Diego CA
TEL: E-MAIL:
510.584.7217
TURNAROUND TIME (Rush surcharge• may apply to any TAT not 'STANDARD"}:
92123
CLIENT PROJECT NAME/ NUMBER:
DATE:
16/~2«-
CHAIN OF CUSTODY RECORDUdt p
11/02123 ------------------
PAGE: 1 OF --------
-
-
-
-
-
-
-
-
P.O,NO.:
SMUSD CARRILLO E.S.-WATER INTRUSION 108822013
PROJECT CONTACT: SAMPLER(S): (PRINT)
Nathan Diem
REQUESTED ANALYSES
Please check box or fill in blank as needed.
D SAME DAY D 24 HR D 48 HR D 72 HR □ 5 DAYS X STANDARD
D COELT EDF I GLOBAL ID:
SPECIAL INSTRUCTIONS:
ECI project# 510 \ c<f30L-\
<·U>.B:-:
:::ci!i~:::
SAMPLING
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SAMPLE ID
DATE
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Relinquis~(¥ature) ._,.,, C/-
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Relinquished by: (Signature)
TIME
OC\5$
MATRIX
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LOG CODE:
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-
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570-161528 Chain of Custody -
I I I I I I I
Received by: (Signature/Affiliation) Time:
tJ, I 1/o(l,y R, • ve r0v I fs-c>
Received by: (Signature/Affiliation) Time:
Received by: (Signature/Affiliation) Date: Time:
06/02/14 Revision
■
Page 27 of 28 12/5/2023
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161~2'<
CHAIN OF CUSTODY RECORDUllt f •
7440 Lincoln Way, Garden Grove, CA 92841-1427 • (714) 895-5494
For courier service/ sample drop off information, contact us26 salesl@eurofinsus.com or call us.
LABORATORY CLIENT:
Ninyo & Moore
ADDRESS: 5710 Ruffin Road
CITY: STATE: ZIP:
San Diego CA
TEL: E-MAIL:
510.584.7217
TURNAROUND TIME (Rulh surcharges may apply to any TAT not "STANDARD''):
92123
::~~'?f?'.':::r>>>>>::::; :_: :.:. DATE: 11/02/23
.·.·.·.·.·.·.·.·.·.·.·. ·.·.·.·.· .... .-:::::::::·:·:·:·:·:·:·:·:·:·:·
••• •• ·-·-:::::::::::::::::.::: :-:::::::::::::::::::::.:-:-:-:-:-PAGE: 1 OF ----------------
CLIENT PROJECT NAME / NUMBER: P.O. NO.:
SMUSD CARRILLO E.S.-WATER INTRUSION 108822013
PROJECT CONTACT: SAMPLER(S): (PRINT)
Nathan Diem
REQUESTED ANALYSES
Please check box or fill in blank as needed.
□ SAME DAY □ 24 HR □ 48 HR □ 72 HR □ 5 DAYS X STANDARD
□ COELT EDF I GLOBAL ID:
SPECIAL INSTRUCTIONS
ECI project# 510 \ '7<i30z.._.\
.·,t.Ae:-: :::o$e::: :~~~y::
SAMPLING
SAMPLE 10
DATE TIME
i l lnb.· ~095"5
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Relinquis~ (~ature) ,_. • u-
/,,, /t//t'o,....
Relinquished by: (Signature)
MATRIX
1.(hAec-
LOG CODE:
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2: ,::,
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NO. (/) c! Ii! a,
OF a. (/)
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570-161528 Chain of Cu~ -
I I I I I I I
Received by: (Signature/Affiliation)
t.J,Jl/o.t'-JI R,·ve,t,...,
Date: Time:
111-17-7.-:. I 9 So
Received by: (Signature/Affiliation) Date: Time:
!1/J7/23. I Cf'Jo
Received by: (Signature/Affiliation) Date: Time:
06/02/14 Revision
■
■
■
Login Sample Receipt Checklist
Client: Ninyo & Moore Job Number: 570-161528-1
Login Number: 161528
Question Answer Comment
Creator: Patel, Jayesh
List Source: Eurofins Calscience
List Number: 1
N/ARadioactivity wasn't checked or is </= background as measured by a survey
meter.
TrueThe cooler's custody seal, if present, is intact.
TrueSample custody seals, if present, are intact.
TrueThe cooler or samples do not appear to have been compromised or
tampered with.
TrueSamples were received on ice.
TrueCooler Temperature is acceptable.
TrueCooler Temperature is recorded.
TrueCOC is present.
TrueCOC is filled out in ink and legible.
TrueCOC is filled out with all pertinent information.
TrueIs the Field Sampler's name present on COC?
TrueThere are no discrepancies between the containers received and the COC.
TrueSamples are received within Holding Time (excluding tests with immediate
HTs)
TrueSample containers have legible labels.
TrueContainers are not broken or leaking.
TrueSample collection date/times are provided.
TrueAppropriate sample containers are used.
TrueSample bottles are completely filled.
TrueSample Preservation Verified.
TrueThere is sufficient vol. for all requested analyses, incl. any requested
MS/MSDs
TrueContainers requiring zero headspace have no headspace or bubble is
<6mm (1/4").
TrueMultiphasic samples are not present.
TrueSamples do not require splitting or compositing.
N/AResidual Chlorine Checked.
Eurofins Calscience
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ANALYTICAL REPORT
PREPARED FOR
Attn: Mr. Nathan Diem
Ninyo & Moore
5710 Ruffin Road
San Diego, California 92123
Generated 12/27/2023 4:48:18 PM
JOB DESCRIPTION
SMUSD Carrillo College E.S. - Water Intrusion
JOB NUMBER
380-75480-1
See page two for job notes and contact information.
Pomona CA 91768-2642
941 Corporate Center Drive
Eurofins Eaton Analytical Pomona
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==~ eurofins
• nment Testing Env1ro
I
Eurofins Eaton Analytical Pomona
Eurofins Drinking Water Testing Pomona is a laboratory within Eurofins Eaton Analytical, LLC, a company within Eurofins Environment Testing Group of
Companies
Job Notes
This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the
samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this
page.
The test results in this report relate only to the samples as received by the laboratory and meet all requirements of the
methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written
approval of the laboratory. All questions should be directed to the Eurofins Eaton Analytical, LLC Project Manager.
Compliance Statement
1. Laboratory is accredited in accordance with TNI 2016 Standards and ISO/IEC 17025:2017.
2. Laboratory certifies that the test results meet all TNI 2016 and ISO/IEC 17025:2017 requirements unless noted under the
individual analysis
3. Test results relate only to the sample(s) tested.
4. This report shall not be reproduced except in full, without the written approval of the laboratory.
5. Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.
(DW,Water matrices)
Authorization
Generated
12/27/2023 4:48:18 PM
Authorized for release by
Jeannette Gutierrez, Project Manager I
Jeannette.Gutierrez@et.eurofinsus.com
(626)386-1100
Page 2 of 17 12/27/2023
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Table of Contents
Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Laboratory Job ID: 380-75480-1
Page 3 of 17 Eurofins Eaton Analytical Pomona12/27/2023
Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Definitions/Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
QC Association Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Lab Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
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Definitions/Glossary
Job ID: 380-75480-1Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Qualifiers
GC Semi VOA
Qualifier Description
J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.
Qualifier
HPLC/IC
Qualifier Description
J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.
Qualifier
Glossary
These commonly used abbreviations may or may not be present in this report.
¤Listed under the "D" column to designate that the result is reported on a dry weight basis
Abbreviation
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level"
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Eurofins Eaton Analytical Pomona
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Job Narrative380-75480-1
Analytical test results meet all requirements of the associated regulatory program listed on the Accreditation/Certification SummaryPage unless otherwise noted under the individual analysis. Data qualifiers are applied to indicate exceptions. Noncompliant
quality control (QC) is further explained in narrative comments.
· Matrix QC may not be reported if insufficient sample or site-specific QC samples were not submitted. In these situations, to
demonstrate precision and accuracy at a batch level, a LCS/LCSD may be performed, unless otherwise specified in the
method.· Surrogate and/or isotope dilution analyte recoveries (if applicable) which are outside of the QC window are confirmed
unless attributed to a dilution or otherwise noted in the narrative.
Regulated compliance samples (e.g. SDWA, NPDES) must comply with the associated agency requirements/permits.
Receipt
The sample was received on 12/18/2023 5:41 PM. Unless otherwise noted below, the sample arrived in good condition, and,
where required, properly preserved and on ice. The temperature of the cooler at receipt time was 4.1°C
GC/MS VOANo additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
GC Semi VOA
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
HPLC/IC
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
Case Narrative
Client: Ninyo & Moore Job ID: 380-75480-1
Project: SMUSD Carrillo College E.S. - Water Intrusion
Eurofins Eaton Analytical Pomona
Job ID: 380-75480-1 Eurofins Eaton Analytical Pomona
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Detection Summary
Job ID: 380-75480-1Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Client Sample ID: B-1 Lab Sample ID: 380-75480-1
No Detections.
Eurofins Eaton Analytical Pomona
This Detection Summary does not include radiochemical test results.
Page 6 of 17 12/27/2023
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Client Sample Results
Job ID: 380-75480-1Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Lab Sample ID: 380-75480-1Client Sample ID: B-1
Matrix: WaterDate Collected: 12/14/23 09:30
Date Received: 12/18/23 17:41
Method: EPA-DW 524.2 - Total Trihalomethanes
RL MDL
ND 0.50 0.062 ug/L 12/21/23 23:54 1
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Trihalomethanes, Total
Method: EPA-DW 524.2 - Volatile Organic Compounds (GC/MS)
RL MDL
ND 2.5 0.57 ug/L 12/21/23 23:54 5
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Chloroform (Trichloromethane)
2.5 0.59 ug/L 12/21/23 23:54 5NDBromodichloromethane
2.5 0.31 ug/L 12/21/23 23:54 5NDDibromochloromethane
2.5 0.71 ug/L 12/21/23 23:54 5NDBromoform
1,2-Dichloroethane-d4 (Surr)108 70-130 12/21/23 23:54 5
Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery
4-Bromofluorobenzene (Surr)101 12/21/23 23:54 570-130
Toluene-d8 (Surr)94 12/21/23 23:54 570-130
Method: SM 6251B - Haloacetic Acids (HAAs) (GC)
RL MDL
ND 1.0 0.055 ug/L 12/21/23 09:12 12/22/23 10:50 1
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Monobromoacetic acid
2.0 0.41 ug/L 12/21/23 09:12 12/22/23 10:50 1NDMonochloroacetic acid
1.0 0.054 ug/L 12/21/23 09:12 12/22/23 10:50 1NDDibromoacetic acid
1.0 0.11 ug/L 12/21/23 09:12 12/22/23 10:50 1NDDichloroacetic acid
1.0 0.10 ug/L 12/21/23 09:12 12/22/23 10:50 1NDTrichloroacetic acid
2,3-Dibromopropionic acid 97 70-130 12/21/23 09:12 12/22/23 10:50 1
Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery
Method: SM 6251B - Total Haloacetic Acids (GC)
RL MDL
ND 2.0 0.054 ug/L 12/22/23 10:50 1
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Total Haloacetic Acids 5
Method: EPA 317 - Bromate, Ion Chromatography
RL MDL
ND 1.0 0.14 ug/L 12/21/23 01:52 1
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Bromate
Eurofins Eaton Analytical Pomona
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Surrogate Summary
Job ID: 380-75480-1Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Method: 524.2 - Volatile Organic Compounds (GC/MS)
Prep Type: Total/NAMatrix: Water
Lab Sample ID Client Sample ID (70-130) (70-130) (70-130)
DCA BFB TOL
108 101 94380-75480-1
Percent Surrogate Recovery (Acceptance Limits)
B-1
97 102 105LCS 380-69021/3 Lab Control Sample
97 99 103LCSD 380-69021/4 Lab Control Sample Dup
93 99 94MB 380-69021/5 Method Blank
Surrogate Legend
DCA = 1,2-Dichloroethane-d4 (Surr)
BFB = 4-Bromofluorobenzene (Surr)
TOL = Toluene-d8 (Surr)
Method: 6251B - Haloacetic Acids (HAAs) (GC)
Prep Type: Total/NAMatrix: Water
Lab Sample ID Client Sample ID (70-130)
23DPA1
97380-75480-1
Percent Surrogate Recovery (Acceptance Limits)
B-1
100MB 380-68767/2-A Method Blank
108MRL 380-68767/1-A Lab Control Sample
Surrogate Legend
23DPA = 2,3-Dibromopropionic acid
Eurofins Eaton Analytical Pomona
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QC Sample Results
Job ID: 380-75480-1Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Method: 524.2 - Volatile Organic Compounds (GC/MS)
Client Sample ID: Method BlankLab Sample ID: MB 380-69021/5
Matrix: Water Prep Type: Total/NA
Analysis Batch: 69021
RL MDL
Chloroform (Trichloromethane)ND 0.50 0.11 ug/L 12/21/23 23:32 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.120.50 ug/L 12/21/23 23:32 1Bromodichloromethane
ND 0.0620.50 ug/L 12/21/23 23:32 1Dibromochloromethane
ND 0.140.50 ug/L 12/21/23 23:32 1Bromoform
1,2-Dichloroethane-d4 (Surr)93 70-130 12/21/23 23:32 1
MB MB
Surrogate Dil FacPrepared AnalyzedQualifier Limits%Recovery
99 12/21/23 23:32 14-Bromofluorobenzene (Surr)70-130
94 12/21/23 23:32 1Toluene-d8 (Surr)70-130
Client Sample ID: Lab Control SampleLab Sample ID: LCS 380-69021/3
Matrix: Water Prep Type: Total/NA
Analysis Batch: 69021
Bromodichloromethane 5.00 4.18 ug/L 84 70 -130
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
Dibromochloromethane 5.00 4.49 ug/L 90 70 -130
Bromoform 5.00 4.31 ug/L 86 70 -130
1,2-Dichloroethane-d4 (Surr)70 -130
Surrogate
97
LCS LCS
Qualifier Limits%Recovery
1024-Bromofluorobenzene (Surr)70 -130
105Toluene-d8 (Surr)70 -130
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 380-69021/4
Matrix: Water Prep Type: Total/NA
Analysis Batch: 69021
Bromodichloromethane 5.00 4.23 ug/L 85 70 -130 1 20
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
Dibromochloromethane 5.00 4.36 ug/L 87 70 -130 3 20
Bromoform 5.00 4.40 ug/L 88 70 -130 2 20
1,2-Dichloroethane-d4 (Surr)70 -130
Surrogate
97
LCSD LCSD
Qualifier Limits%Recovery
994-Bromofluorobenzene (Surr)70 -130
103Toluene-d8 (Surr)70 -130
Method: 6251B - Haloacetic Acids (HAAs) (GC)
Client Sample ID: Method BlankLab Sample ID: MB 380-68767/2-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 69157 Prep Batch: 68767
RL MDL
Monobromoacetic acid ND 1.0 0.055 ug/L 12/21/23 09:12 12/22/23 07:42 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.412.0 ug/L 12/21/23 09:12 12/22/23 07:42 1Monochloroacetic acid
ND 0.0541.0 ug/L 12/21/23 09:12 12/22/23 07:42 1Dibromoacetic acid
Eurofins Eaton Analytical Pomona
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QC Sample Results
Job ID: 380-75480-1Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Method: 6251B - Haloacetic Acids (HAAs) (GC) (Continued)
Client Sample ID: Method BlankLab Sample ID: MB 380-68767/2-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 69157 Prep Batch: 68767
RL MDL
Dichloroacetic acid ND 1.0 0.11 ug/L 12/21/23 09:12 12/22/23 07:42 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.101.0 ug/L 12/21/23 09:12 12/22/23 07:42 1Trichloroacetic acid
2,3-Dibromopropionic acid 100 70-130 12/22/23 07:42 1
MB MB
Surrogate
12/21/23 09:12
Dil FacPrepared AnalyzedQualifier Limits%Recovery
Client Sample ID: Lab Control SampleLab Sample ID: MRL 380-68767/1-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 69157 Prep Batch: 68767
Monobromoacetic acid 1.00 1.04 ug/L 104 50 -150
Analyte
MRL MRL
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
Monochloroacetic acid 2.00 2.33 ug/L 117 50 -150
Dibromoacetic acid 1.00 1.06 ug/L 106 50 -150
Dichloroacetic acid 1.00 0.755 J ug/L 76 50 -150
Trichloroacetic acid 1.00 1.05 ug/L 105 50 -150
2,3-Dibromopropionic acid 70 -130
Surrogate
108
MRL MRL
Qualifier Limits%Recovery
Method: 317 - Bromate, Ion Chromatography
Client Sample ID: Method BlankLab Sample ID: MB 380-68889/4
Matrix: Water Prep Type: Total/NA
Analysis Batch: 68889
RL MDL
Bromate ND 1.0 0.14 ug/L 12/20/23 20:23 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
Client Sample ID: Lab Control SampleLab Sample ID: LCS 380-68889/2
Matrix: Water Prep Type: Total/NA
Analysis Batch: 68889
Bromate 10.0 9.42 ug/L 94 90 -110
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 380-68889/3
Matrix: Water Prep Type: Total/NA
Analysis Batch: 68889
Bromate 10.0 9.39 ug/L 94 90 -110 0 10
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
Client Sample ID: Lab Control SampleLab Sample ID: MRL 380-68889/5
Matrix: Water Prep Type: Total/NA
Analysis Batch: 68889
Bromate 1.00 0.873 J ug/L 87 75 -125
Analyte
MRL MRL
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
Eurofins Eaton Analytical Pomona
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QC Association Summary
Job ID: 380-75480-1Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
GC/MS VOA
Analysis Batch: 69021
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 524.2380-75480-1 B-1 Total/NA
Water 524.2MB 380-69021/5 Method Blank Total/NA
Water 524.2LCS 380-69021/3 Lab Control Sample Total/NA
Water 524.2LCSD 380-69021/4 Lab Control Sample Dup Total/NA
Analysis Batch: 69283
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 524.2380-75480-1 B-1 Total/NA
GC Semi VOA
Prep Batch: 68767
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 6251B380-75480-1 B-1 Total/NA
Water 6251BMB 380-68767/2-A Method Blank Total/NA
Water 6251BMRL 380-68767/1-A Lab Control Sample Total/NA
Analysis Batch: 69157
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 6251B 68767380-75480-1 B-1 Total/NA
Water 6251B 68767MB 380-68767/2-A Method Blank Total/NA
Water 6251B 68767MRL 380-68767/1-A Lab Control Sample Total/NA
Analysis Batch: 69520
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 6251B380-75480-1 B-1 Total/NA
HPLC/IC
Analysis Batch: 68889
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 317380-75480-1 B-1 Total/NA
Water 317MB 380-68889/4 Method Blank Total/NA
Water 317LCS 380-68889/2 Lab Control Sample Total/NA
Water 317LCSD 380-68889/3 Lab Control Sample Dup Total/NA
Water 317MRL 380-68889/5 Lab Control Sample Total/NA
Eurofins Eaton Analytical Pomona
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Lab Chronicle
Client: Ninyo & Moore Job ID: 380-75480-1
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Client Sample ID: B-1 Lab Sample ID: 380-75480-1
Matrix: WaterDate Collected: 12/14/23 09:30
Date Received: 12/18/23 17:41
Analysis 524.2 Q6AD5 69021 EA POM
Type
Batch Batch
MethodPrep Type LabAnalystRun
Prepared
or Analyzed
Batch
Number
Dilution
Factor
Total/NA 12/21/23 23:54
Analysis 524.2 1 69283 UKCP EA POMTotal/NA 12/21/23 23:54
Prep 6251B 68767 QBD3 EA POMTotal/NA 12/21/23 09:12
Analysis 6251B 1 69157 H5VG EA POMTotal/NA 12/22/23 10:50
Analysis 6251B 1 69520 UXOU EA POMTotal/NA 12/22/23 10:50
Analysis 317 1 68889 VB9B EA POMTotal/NA 12/21/23 01:52
Laboratory References:
EA POM = Eurofins Eaton Analytical Pomona, 941 Corporate Center Drive, Pomona, CA 91768-2642, TEL (626)386-1100
Eurofins Eaton Analytical Pomona
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Accreditation/Certification Summary
Client: Ninyo & Moore Job ID: 380-75480-1
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Laboratory: Eurofins Eaton Analytical Pomona
Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.
Authority Program Identification Number Expiration Date
California State 2813 06-18-25
The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes
for which the agency does not offer certification.
Analysis Method Prep Method Matrix Analyte
317 Water Bromate
524.2 Water Bromodichloromethane
524.2 Water Bromoform
524.2 Water Chloroform (Trichloromethane)
524.2 Water Dibromochloromethane
524.2 Water Trihalomethanes, Total
6251B Water Total Haloacetic Acids 5
6251B 6251B Water Dibromoacetic acid
6251B 6251B Water Dichloroacetic acid
6251B 6251B Water Monobromoacetic acid
6251B 6251B Water Monochloroacetic acid
6251B 6251B Water Trichloroacetic acid
Eurofins Eaton Analytical Pomona
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Method Summary
Job ID: 380-75480-1Client: Ninyo & Moore
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Method Method Description LaboratoryProtocol
EPA-DW524.2 Total Trihalomethanes EA POM
EPA-DW524.2 Volatile Organic Compounds (GC/MS)EA POM
SM6251BHaloacetic Acids (HAAs) (GC)EA POM
SM6251BTotal Haloacetic Acids (GC)EA POM
EPA317Bromate, Ion Chromatography EA POM
SM6251BMicroextraction EA POM
Protocol References:
EPA = US Environmental Protection Agency
EPA-DW = "Methods For The Determination Of Organic Compounds In Drinking Water", EPA/600/4-88/039, December 1988 And Its Supplements.
SM = "Standard Methods For The Examination Of Water And Wastewater"
Laboratory References:
EA POM = Eurofins Eaton Analytical Pomona, 941 Corporate Center Drive, Pomona, CA 91768-2642, TEL (626)386-1100
Eurofins Eaton Analytical Pomona
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Sample Summary
Client: Ninyo & Moore Job ID: 380-75480-1
Project/Site: SMUSD Carrillo College E.S. - Water Intrusion
Lab Sample ID Client Sample ID Matrix Collected Received
380-75480-1 B-1 Water 12/14/23 09:30 12/18/23 17:41
Eurofins Eaton Analytical PomonaPage 15 of 17 12/27/2023
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.:-;, eu rofi ns CHAIN OF CUSTODY RECORD
I ¼,..,___
I WO·#fl.AB USE·ONLY / ::t -z..,_ Calsc ience ,-1,LJ DATE: ;"
PAGE: 1 OF 1
7440 Lincoln Way, Garden Grove, CA 92841-1427 • (714) 895-5494
For courier service/ sample drop off InformatIon, contact us26 sales@eurofinsus com or call us
LABORATORY CLIENT CLIENT PROJECT NAME/ NUMBER. PO NO
Ninyo & Moore
SMUSD Carrillo College E.S. -Water Intrusion 108822013
ADDRESS·
5710 Ruffin Road PROJECT CONTACT SAMPLER($) (PRINT)
CITY STATE ZIP·
San Diego CA 92123 Nathan Diem Nathan Diem
TEL. E-MAIL.
510.584.7217 ndiern@ninyoandmoore.com REQUESTED ANALYSES
TURNAROUND TIME (Rush surcharges may apply to any TAT not "STANDARD") Please check box or fill in blank as needed.
□ SAME DAY □24HR O48HR O72HR □ 5 DAYS XSTANDARD
I GLOBAL ID LOG CODE:
□ C0ELTEDF N
'SI' N
SPECIAL INSTRUCTIONS· I.{)
(/) Q)
To be transferred to Eurofins Eaton Pomona C: Cll
£ (/) Q)
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Relinquished /~_gn:tu_rel;.,,: -Received by (S1gnature/AffiliatIon) Date Time
I -· i '. \_ -+-' I.J.,1t.1 ! ✓-~ i ':l:s ·c,., ,-.,., ~.,, ,\.,,,_)~ \\.., c,, .\·~ e-/ ,_.,..... -----•-.
Relinquished by (Signature) Rece1Ved by (S1gnature/AffiliatIon) Date Time
~J,'/h.O'M" 1<:v~ ,~/24'/~ /SO 0 ' Relinquished by (Signature) Received b~~e/A,,1on) rl Date/I j:2 Time ~
r tJ1/Ji~ '{2.;-t1ett,v t ~ I fl ?,J I 900
BG 06/02/14 Rev1s1on
Login Sample Receipt Checklist
Client: Ninyo & Moore Job Number: 380-75480-1
Login Number: 75480
Question Answer Comment
Creator: Ngo, Theodore
List Source: Eurofins Eaton Analytical Pomona
List Number: 1
TrueThe cooler's custody seal, if present, is intact.
TrueSample custody seals, if present, are intact.
TrueSamples were received on ice.
TrueCooler Temperature is acceptable.
TrueCooler Temperature is recorded.
TrueCOC is present.
TrueCOC is filled out in ink and legible.
TrueCOC is filled out with all pertinent information.
TrueThere are no discrepancies between the containers received and the COC.
TrueSamples are received within Holding Time (excluding tests with immediate
HTs)
TrueSample containers have legible labels.
TrueContainers are not broken or leaking.
TrueSample collection date/times are provided.
TrueThere is sufficient vol. for all requested analyses, incl. any requested
MS/MSDs
TrueContainers requiring zero headspace have no headspace or bubble is
<6mm (1/4").
TrueSamples do not require splitting or compositing.
TrueContainer provided by EEA
Eurofins Eaton Analytical Pomona
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ANALYTICAL REPORT
PREPARED FOR
Attn: Mr. Nathan Diem
Ninyo & Moore
5710 Ruffin Road
San Diego, California 92123
Generated 1/9/2024 6:38:20 AM
JOB DESCRIPTION
CARRILLO E.S.- WATER INTRUSION
JOB NUMBER
570-166792-1
See page two for job notes and contact information.
Tustin CA 92780
2841 Dow Avenue, Suite 100
Eurofins Calscience
Page 1 of 28
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==~ eurofins
• nment Testing Env1ro
I
Eurofins Calscience
Eurofins Calscience is a laboratory within Eurofins Environment Testing Southwest, LLC, a company within Eurofins Environment Testing Group of Companies
Job Notes
This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the
samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this
page.
The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the
methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written
approval of the laboratory. All questions should be directed to the Eurofins Calscience Project Manager.
Authorization
Generated
1/9/2024 6:38:20 AM
Authorized for release by
Virendra Patel, Project Manager I
Virendra.Patel@et.eurofinsus.com
(714)895-5494
Page 2 of 28 1/9/2024
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Table of Contents
Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Laboratory Job ID: 570-166792-1
Page 3 of 28 Eurofins Calscience1/9/2024
Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Definitions/Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
QC Association Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Lab Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
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Definitions/Glossary
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Qualifiers
HPLC/IC
Qualifier Description
E Result exceeded calibration range.
Qualifier
Glossary
These commonly used abbreviations may or may not be present in this report.
¤Listed under the "D" column to designate that the result is reported on a dry weight basis
Abbreviation
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level"
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Eurofins Calscience
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Job Narrative570-166792-1
Analytical test results meet all requirements of the associated regulatory program listed on the Accreditation/Certification SummaryPage unless otherwise noted under the individual analysis. Data qualifiers are applied to indicate exceptions. Noncompliant
quality control (QC) is further explained in narrative comments.
· Matrix QC may not be reported if insufficient sample or site-specific QC samples were not submitted. In these situations, to
demonstrate precision and accuracy at a batch level, a LCS/LCSD may be performed, unless otherwise specified in the
method.· Surrogate and/or isotope dilution analyte recoveries (if applicable) which are outside of the QC window are confirmed
unless attributed to a dilution or otherwise noted in the narrative.
Regulated compliance samples (e.g. SDWA, NPDES) must comply with the associated agency requirements/permits.
Receipt
The sample was received on 1/3/2024 6:40 PM. Unless otherwise noted below, the sample arrived in good condition, and, where
required, properly preserved and on ice. The temperature of the cooler at receipt time was 2.0°C
Receipt ExceptionsThe following sample was collected in an improper container: B-1 (570-166792-1). It was not recieved the proper container for
TPH-D.
The following sample was collected in an improper container: B-1 (570-166792-1). It was received 1x 1L amber with H2SO4 for
TPH-Diesel.
GC/MS VOA
Method 8260B: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associatedwith analytical batch 570-398453. The laboratory control sample (LCS) was performed in duplicate (LCSD) to provide precision
data for this batch.
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
Gasoline Range Organics
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
Diesel Range OrganicsMethod 8015B_DRO: A portion of the following sample was used for analysis, rather than testing the entire sample amount in the
original container, due to the sample was prepared using an exact volume as opposed to the volume received: B-1
(570-166792-1). As such, the required solvent rinse of the original container could not be performed. 8015B_DRO
Method 8015B_DRO: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD)
associated with preparation batch 570-398193. 8015B_DRO. The laboratory control sample (LCS) was performed in duplicate
(LCSD) to provide precision data for this batch.
Method 8015B_DRO: The following sample was improperly preserved in the field: B-1 (570-166792-1). The preservative used is
not compatible with the analytes requested. This does not meet regulatory requirements.
8015B_DRO
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
HPLC/IC
Method 300_ORGFMS: The native sample, matrix spike, and matrix spike duplicate (MS/MSD) associated with analytical batch570-398248 were performed at the same dilution. Due to the additional level of analyte present in the spiked samples, the
concentration of Nitrate as N in the MS/MSD was above the instrument calibration range. The data have been reported and
qualified.
Method 300_ORGFMS: The following sample was diluted due to the nature of the sample matrix: B-1 (570-166792-1). Elevated
reporting limits (RLs) are provided.
Case Narrative
Client: Ninyo & Moore Job ID: 570-166792-1
Project: CARRILLO E.S.- WATER INTRUSION
Eurofins Calscience
Job ID: 570-166792-1 Eurofins Calscience
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No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
General Chemistry
Method 1664A: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated
with preparation batch 570-398570. The laboratory control sample (LCS) was performed in duplicate (LCSD) to provide precision
data for this batch.
Method 1664.
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
Case Narrative
Client: Ninyo & Moore Job ID: 570-166792-1
Project: CARRILLO E.S.- WATER INTRUSION
Eurofins Calscience
Job ID: 570-166792-1 (Continued)Eurofins Calscience
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Detection Summary
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Client Sample ID: B-1 Lab Sample ID: 570-166792-1
No Detections.
Eurofins Calscience
This Detection Summary does not include radiochemical test results.
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Client Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: SW846 8260B - Volatile Organic Compounds (GC/MS)
Lab Sample ID: 570-166792-1Client Sample ID: B-1
Matrix: WaterDate Collected: 01/02/24 09:30
Date Received: 01/03/24 18:40
RL MDL
ND 2.0 0.36 ug/L 01/04/24 18:09 1
Analyte Dil FacAnalyzedPreparedUnitDResultQualifier
1,1,1,2-Tetrachloroethane
1.0 0.36 ug/L 01/04/24 18:09 1ND1,1,1-Trichloroethane
1.0 0.31 ug/L 01/04/24 18:09 1ND1,1,2,2-Tetrachloroethane
10 2.5 ug/L 01/04/24 18:09 1ND1,1,2-Trichloro-1,2,2-trifluoroethane
1.0 0.30 ug/L 01/04/24 18:09 1ND1,1,2-Trichloroethane
1.0 0.34 ug/L 01/04/24 18:09 1ND1,1-Dichloroethane
1.0 0.42 ug/L 01/04/24 18:09 1ND1,1-Dichloroethene
1.0 0.41 ug/L 01/04/24 18:09 1ND1,1-Dichloropropene
1.0 0.59 ug/L 01/04/24 18:09 1ND1,2,3-Trichlorobenzene
5.0 0.42 ug/L 01/04/24 18:09 1ND1,2,3-Trichloropropane
1.0 0.71 ug/L 01/04/24 18:09 1ND1,2,4-Trichlorobenzene
1.0 0.34 ug/L 01/04/24 18:09 1ND1,2,4-Trimethylbenzene
10 2.1 ug/L 01/04/24 18:09 1ND1,2-Dibromo-3-Chloropropane
1.0 0.41 ug/L 01/04/24 18:09 1ND1,2-Dibromoethane
1.0 0.26 ug/L 01/04/24 18:09 1ND1,2-Dichlorobenzene
0.50 0.25 ug/L 01/04/24 18:09 1ND1,2-Dichloroethane
1.0 0.42 ug/L 01/04/24 18:09 1ND1,2-Dichloropropane
1.0 0.50 ug/L 01/04/24 18:09 1ND1,3,5-Trimethylbenzene
1.0 0.26 ug/L 01/04/24 18:09 1ND1,3-Dichlorobenzene
1.0 0.32 ug/L 01/04/24 18:09 1ND1,3-Dichloropropane
1.0 0.28 ug/L 01/04/24 18:09 1ND1,4-Dichlorobenzene
1.0 0.50 ug/L 01/04/24 18:09 1ND2,2-Dichloropropane
10 4.5 ug/L 01/04/24 18:09 1ND2-Butanone
1.0 0.33 ug/L 01/04/24 18:09 1ND2-Chlorotoluene
10 2.7 ug/L 01/04/24 18:09 1ND2-Hexanone
1.0 0.35 ug/L 01/04/24 18:09 1ND4-Chlorotoluene
10 3.2 ug/L 01/04/24 18:09 1ND4-Methyl-2-pentanone
10 7.4 ug/L 01/04/24 18:09 1NDAcetone
0.50 0.24 ug/L 01/04/24 18:09 1NDBenzene
1.0 0.29 ug/L 01/04/24 18:09 1NDBromobenzene
2.0 0.38 ug/L 01/04/24 18:09 1NDBromochloromethane
1.0 0.29 ug/L 01/04/24 18:09 1NDBromodichloromethane
5.0 1.9 ug/L 01/04/24 18:09 1NDBromoform
25 7.4 ug/L 01/04/24 18:09 1NDBromomethane
1.0 0.39 ug/L 01/04/24 18:09 1NDcis-1,2-Dichloroethene
0.50 0.26 ug/L 01/04/24 18:09 1NDcis-1,3-Dichloropropene
10 0.42 ug/L 01/04/24 18:09 1NDCarbon disulfide
0.50 0.37 ug/L 01/04/24 18:09 1NDCarbon tetrachloride
1.0 0.26 ug/L 01/04/24 18:09 1NDChlorobenzene
5.0 1.9 ug/L 01/04/24 18:09 1NDChloroethane
1.0 0.32 ug/L 01/04/24 18:09 1NDChloroform
10 2.2 ug/L 01/04/24 18:09 1NDChloromethane
2.0 0.37 ug/L 01/04/24 18:09 1NDDibromochloromethane
1.0 0.33 ug/L 01/04/24 18:09 1NDDibromomethane
5.0 0.62 ug/L 01/04/24 18:09 1NDDichlorodifluoromethane
2.0 0.33 ug/L 01/04/24 18:09 1NDDi-isopropyl ether (DIPE)
100 52 ug/L 01/04/24 18:09 1NDEthanol
1.0 0.30 ug/L 01/04/24 18:09 1NDEthylbenzene
2.0 0.35 ug/L 01/04/24 18:09 1NDEthyl-t-butyl ether (ETBE)
Eurofins Calscience
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Client Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued)
Lab Sample ID: 570-166792-1Client Sample ID: B-1
Matrix: WaterDate Collected: 01/02/24 09:30
Date Received: 01/03/24 18:40
RL MDL
ND 1.0 0.41 ug/L 01/04/24 18:09 1
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Isopropylbenzene
10 3.0 ug/L 01/04/24 18:09 1NDMethylene Chloride
1.0 0.30 ug/L 01/04/24 18:09 1NDMethyl-t-Butyl Ether (MTBE)
10 4.9 ug/L 01/04/24 18:09 1NDNaphthalene
1.0 0.53 ug/L 01/04/24 18:09 1NDn-Butylbenzene
1.0 0.47 ug/L 01/04/24 18:09 1NDN-Propylbenzene
1.0 0.27 ug/L 01/04/24 18:09 1NDo-Xylene
2.0 0.49 ug/L 01/04/24 18:09 1NDm,p-Xylene
1.0 0.47 ug/L 01/04/24 18:09 1NDp-Isopropyltoluene
1.0 0.37 ug/L 01/04/24 18:09 1NDsec-Butylbenzene
1.0 0.38 ug/L 01/04/24 18:09 1NDStyrene
1.0 0.42 ug/L 01/04/24 18:09 1NDtrans-1,2-Dichloroethene
0.50 0.31 ug/L 01/04/24 18:09 1NDtrans-1,3-Dichloropropene
2.0 0.39 ug/L 01/04/24 18:09 1NDTert-amyl-methyl ether (TAME)
10 2.7 ug/L 01/04/24 18:09 1NDtert-Butyl alcohol (TBA)
1.0 0.38 ug/L 01/04/24 18:09 1NDtert-Butylbenzene
1.0 0.40 ug/L 01/04/24 18:09 1NDTetrachloroethene
1.0 0.30 ug/L 01/04/24 18:09 1NDToluene
1.0 0.39 ug/L 01/04/24 18:09 1NDTrichloroethene
10 0.75 ug/L 01/04/24 18:09 1NDTrichlorofluoromethane
10 5.0 ug/L 01/04/24 18:09 1NDVinyl acetate
0.50 0.43 ug/L 01/04/24 18:09 1NDVinyl chloride
1,2-Dichloroethane-d4 (Surr)96 70-123 01/04/24 18:09 1
Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery
4-Bromofluorobenzene (Surr)93 01/04/24 18:09 180-120
Dibromofluoromethane (Surr)102 01/04/24 18:09 178-120
Toluene-d8 (Surr)96 01/04/24 18:09 180-120
Eurofins Calscience
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Client Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: SW846 8015B - Gasoline Range Organics - (GC)
Lab Sample ID: 570-166792-1Client Sample ID: B-1
Matrix: WaterDate Collected: 01/02/24 09:30
Date Received: 01/03/24 18:40
RL MDL
ND 50 30 ug/L 01/08/24 18:27 1
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr)102 20-144 01/08/24 18:27 1
Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery
Eurofins Calscience
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Client Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: SW846 8015B - Diesel Range Organics (DRO) (GC)
Lab Sample ID: 570-166792-1Client Sample ID: B-1
Matrix: WaterDate Collected: 01/02/24 09:30
Date Received: 01/03/24 18:40
RL MDL
ND 50 36 ug/L 01/04/24 13:06 01/08/24 13:46 1
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Diesel Range Organics [C10-C28]
250 66 ug/L 01/04/24 13:06 01/08/24 13:46 1NDTPH as Motor Oil (C17-C44)
n-Octacosane (Surr)120 53-151 01/04/24 13:06 01/08/24 13:46 1
Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery
Eurofins Calscience
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Client Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: EPA 300.0 - Anions, Ion Chromatography
Lab Sample ID: 570-166792-1Client Sample ID: B-1
Matrix: WaterDate Collected: 01/02/24 09:30
Date Received: 01/03/24 18:40
RL MDL
ND 0.20 0.086 mg/L 01/04/24 06:15 2
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
Nitrite as N
0.20 0.039 mg/L 01/04/24 06:15 2NDNitrate as N
Eurofins Calscience
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Client Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
General Chemistry
Lab Sample ID: 570-166792-1Client Sample ID: B-1
Matrix: WaterDate Collected: 01/02/24 09:30
Date Received: 01/03/24 18:40
RL MDL
ND 0.952 0.486 mg/L 01/04/24 17:56 01/05/24 19:32 1
Analyte Dil FacAnalyzedPreparedUnitDResult Qualifier
HEM: Oil and Grease (1664A)
Eurofins Calscience
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Surrogate Summary
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS)
Prep Type: Total/NAMatrix: Water
Lab Sample ID Client Sample ID (70-123) (80-120) (78-120) (80-120)
DCA BFB DBFM TOL
96 93 102 96570-166792-1
Percent Surrogate Recovery (Acceptance Limits)
B-1
91 97 95 98LCS 570-398453/4 Lab Control Sample
91 98 95 99LCSD 570-398453/5 Lab Control Sample Dup
93 92 99 97MB 570-398453/7 Method Blank
Surrogate Legend
DCA = 1,2-Dichloroethane-d4 (Surr)
BFB = 4-Bromofluorobenzene (Surr)
DBFM = Dibromofluoromethane (Surr)
TOL = Toluene-d8 (Surr)
Method: 8015B - Gasoline Range Organics - (GC)
Prep Type: Total/NAMatrix: Water
Lab Sample ID Client Sample ID (20-144)
BFB1
102570-166792-1
Percent Surrogate Recovery (Acceptance Limits)
B-1
102570-166793-B-1 MS Matrix Spike
107570-166793-B-1 MSD Matrix Spike Duplicate
101LCS 570-399272/12 Lab Control Sample
104LCSD 570-399272/13 Lab Control Sample Dup
90MB 570-399272/14 Method Blank
Surrogate Legend
BFB = 4-Bromofluorobenzene (Surr)
Method: 8015B - Diesel Range Organics (DRO) (GC)
Prep Type: Total/NAMatrix: Water
Lab Sample ID Client Sample ID (53-151)
OTCSN1
120570-166792-1
Percent Surrogate Recovery (Acceptance Limits)
B-1
107LCS 570-398193/2-A Lab Control Sample
109LCSD 570-398193/3-A Lab Control Sample Dup
124MB 570-398193/1-A Method Blank
Surrogate Legend
OTCSN = n-Octacosane (Surr)
Eurofins Calscience
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QC Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS)
Client Sample ID: Method BlankLab Sample ID: MB 570-398453/7
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398453
RL MDL
1,1,1,2-Tetrachloroethane ND 2.0 0.36 ug/L 01/04/24 15:51 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.361.0 ug/L 01/04/24 15:51 11,1,1-Trichloroethane
ND 0.311.0 ug/L 01/04/24 15:51 11,1,2,2-Tetrachloroethane
ND 2.510 ug/L 01/04/24 15:51 11,1,2-Trichloro-1,2,2-trifluoroethane
ND 0.301.0 ug/L 01/04/24 15:51 11,1,2-Trichloroethane
ND 0.341.0 ug/L 01/04/24 15:51 11,1-Dichloroethane
ND 0.421.0 ug/L 01/04/24 15:51 11,1-Dichloroethene
ND 0.411.0 ug/L 01/04/24 15:51 11,1-Dichloropropene
ND 0.591.0 ug/L 01/04/24 15:51 11,2,3-Trichlorobenzene
ND 0.425.0 ug/L 01/04/24 15:51 11,2,3-Trichloropropane
ND 0.711.0 ug/L 01/04/24 15:51 11,2,4-Trichlorobenzene
ND 0.341.0 ug/L 01/04/24 15:51 11,2,4-Trimethylbenzene
ND 2.110 ug/L 01/04/24 15:51 11,2-Dibromo-3-Chloropropane
ND 0.411.0 ug/L 01/04/24 15:51 11,2-Dibromoethane
ND 0.261.0 ug/L 01/04/24 15:51 11,2-Dichlorobenzene
ND 0.250.50 ug/L 01/04/24 15:51 11,2-Dichloroethane
ND 0.421.0 ug/L 01/04/24 15:51 11,2-Dichloropropane
ND 0.501.0 ug/L 01/04/24 15:51 11,3,5-Trimethylbenzene
ND 0.261.0 ug/L 01/04/24 15:51 11,3-Dichlorobenzene
ND 0.321.0 ug/L 01/04/24 15:51 11,3-Dichloropropane
ND 0.281.0 ug/L 01/04/24 15:51 11,4-Dichlorobenzene
ND 0.501.0 ug/L 01/04/24 15:51 12,2-Dichloropropane
ND 4.510 ug/L 01/04/24 15:51 12-Butanone
ND 0.331.0 ug/L 01/04/24 15:51 12-Chlorotoluene
ND 2.710 ug/L 01/04/24 15:51 12-Hexanone
ND 0.351.0 ug/L 01/04/24 15:51 14-Chlorotoluene
ND 3.210 ug/L 01/04/24 15:51 14-Methyl-2-pentanone
ND 7.410 ug/L 01/04/24 15:51 1Acetone
ND 0.240.50 ug/L 01/04/24 15:51 1Benzene
ND 0.291.0 ug/L 01/04/24 15:51 1Bromobenzene
ND 0.382.0 ug/L 01/04/24 15:51 1Bromochloromethane
ND 0.291.0 ug/L 01/04/24 15:51 1Bromodichloromethane
ND 1.95.0 ug/L 01/04/24 15:51 1Bromoform
ND 7.425 ug/L 01/04/24 15:51 1Bromomethane
ND 0.391.0 ug/L 01/04/24 15:51 1cis-1,2-Dichloroethene
ND 0.260.50 ug/L 01/04/24 15:51 1cis-1,3-Dichloropropene
ND 0.4210 ug/L 01/04/24 15:51 1Carbon disulfide
ND 0.370.50 ug/L 01/04/24 15:51 1Carbon tetrachloride
ND 0.261.0 ug/L 01/04/24 15:51 1Chlorobenzene
ND 1.95.0 ug/L 01/04/24 15:51 1Chloroethane
ND 0.321.0 ug/L 01/04/24 15:51 1Chloroform
ND 2.210 ug/L 01/04/24 15:51 1Chloromethane
ND 0.372.0 ug/L 01/04/24 15:51 1Dibromochloromethane
ND 0.331.0 ug/L 01/04/24 15:51 1Dibromomethane
ND 0.625.0 ug/L 01/04/24 15:51 1Dichlorodifluoromethane
ND 0.332.0 ug/L 01/04/24 15:51 1Di-isopropyl ether (DIPE)
ND 52100 ug/L 01/04/24 15:51 1Ethanol
ND 0.301.0 ug/L 01/04/24 15:51 1Ethylbenzene
Eurofins Calscience
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QC Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)
Client Sample ID: Method BlankLab Sample ID: MB 570-398453/7
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398453
RL MDL
Ethyl-t-butyl ether (ETBE)ND 2.0 0.35 ug/L 01/04/24 15:51 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.411.0 ug/L 01/04/24 15:51 1Isopropylbenzene
ND 3.010 ug/L 01/04/24 15:51 1Methylene Chloride
ND 0.301.0 ug/L 01/04/24 15:51 1Methyl-t-Butyl Ether (MTBE)
ND 4.910 ug/L 01/04/24 15:51 1Naphthalene
ND 0.531.0 ug/L 01/04/24 15:51 1n-Butylbenzene
ND 0.471.0 ug/L 01/04/24 15:51 1N-Propylbenzene
ND 0.271.0 ug/L 01/04/24 15:51 1o-Xylene
ND 0.492.0 ug/L 01/04/24 15:51 1m,p-Xylene
ND 0.471.0 ug/L 01/04/24 15:51 1p-Isopropyltoluene
ND 0.371.0 ug/L 01/04/24 15:51 1sec-Butylbenzene
ND 0.381.0 ug/L 01/04/24 15:51 1Styrene
ND 0.421.0 ug/L 01/04/24 15:51 1trans-1,2-Dichloroethene
ND 0.310.50 ug/L 01/04/24 15:51 1trans-1,3-Dichloropropene
ND 0.392.0 ug/L 01/04/24 15:51 1Tert-amyl-methyl ether (TAME)
ND 2.710 ug/L 01/04/24 15:51 1tert-Butyl alcohol (TBA)
ND 0.381.0 ug/L 01/04/24 15:51 1tert-Butylbenzene
ND 0.401.0 ug/L 01/04/24 15:51 1Tetrachloroethene
ND 0.301.0 ug/L 01/04/24 15:51 1Toluene
ND 0.391.0 ug/L 01/04/24 15:51 1Trichloroethene
ND 0.7510 ug/L 01/04/24 15:51 1Trichlorofluoromethane
ND 5.010 ug/L 01/04/24 15:51 1Vinyl acetate
ND 0.430.50 ug/L 01/04/24 15:51 1Vinyl chloride
1,2-Dichloroethane-d4 (Surr)93 70-123 01/04/24 15:51 1
MB MB
Surrogate Dil FacPrepared AnalyzedQualifier Limits%Recovery
92 01/04/24 15:51 14-Bromofluorobenzene (Surr)80-120
99 01/04/24 15:51 1Dibromofluoromethane (Surr)78-120
97 01/04/24 15:51 1Toluene-d8 (Surr)80-120
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-398453/4
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398453
1,1-Dichloroethene 20.0 18.29 ug/L 91 80 -133
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
1,2-Dibromoethane 20.0 18.93 ug/L 95 80 -120
1,2-Dichlorobenzene 20.0 18.98 ug/L 95 80 -121
1,2-Dichloroethane 20.0 17.34 ug/L 87 77 -122
Benzene 20.0 18.20 ug/L 91 80 -121
Carbon tetrachloride 20.0 20.06 ug/L 100 71 -137
Chlorobenzene 20.0 19.11 ug/L 96 80 -120
Di-isopropyl ether (DIPE)20.0 17.08 ug/L 85 75 -134
Ethanol 200 195.1 ug/L 98 50 -168
Ethylbenzene 20.0 18.65 ug/L 93 80 -121
Ethyl-t-butyl ether (ETBE)20.0 17.79 ug/L 89 80 -124
Methyl-t-Butyl Ether (MTBE)20.0 18.09 ug/L 90 78 -123
o-Xylene 20.0 18.16 ug/L 91 80 -122
Eurofins Calscience
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QC Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-398453/4
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398453
m,p-Xylene 40.0 37.33 ug/L 93 80 -123
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
1,2-Dichloroethane-d4 (Surr)70 -123
Surrogate
91
LCS LCS
Qualifier Limits%Recovery
974-Bromofluorobenzene (Surr)80 -120
95Dibromofluoromethane (Surr)78 -120
98Toluene-d8 (Surr)80 -120
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-398453/5
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398453
1,1-Dichloroethene 20.0 17.20 ug/L 86 80 -133 6 20
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
1,2-Dibromoethane 20.0 19.35 ug/L 97 80 -120 2 20
1,2-Dichlorobenzene 20.0 18.78 ug/L 94 80 -121 1 20
1,2-Dichloroethane 20.0 17.43 ug/L 87 77 -122 1 20
Benzene 20.0 17.89 ug/L 89 80 -121 2 20
Carbon tetrachloride 20.0 19.17 ug/L 96 71 -137 5 20
Chlorobenzene 20.0 18.98 ug/L 95 80 -120 1 20
Di-isopropyl ether (DIPE)20.0 16.67 ug/L 83 75 -134 2 20
Ethanol 200 188.0 ug/L 94 50 -168 4 29
Ethylbenzene 20.0 18.53 ug/L 93 80 -121 1 20
Ethyl-t-butyl ether (ETBE)20.0 17.45 ug/L 87 80 -124 2 20
Methyl-t-Butyl Ether (MTBE)20.0 17.95 ug/L 90 78 -123 1 20
o-Xylene 20.0 18.15 ug/L 91 80 -122 0 20
m,p-Xylene 40.0 36.95 ug/L 92 80 -123 1 20
1,2-Dichloroethane-d4 (Surr)70 -123
Surrogate
91
LCSD LCSD
Qualifier Limits%Recovery
984-Bromofluorobenzene (Surr)80 -120
95Dibromofluoromethane (Surr)78 -120
99Toluene-d8 (Surr)80 -120
Method: 8015B - Gasoline Range Organics - (GC)
Client Sample ID: Method BlankLab Sample ID: MB 570-399272/14
Matrix: Water Prep Type: Total/NA
Analysis Batch: 399272
RL MDL
Gasoline Range Organics (C4-C12)ND 50 30 ug/L 01/08/24 15:19 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
4-Bromofluorobenzene (Surr)90 20-144 01/08/24 15:19 1
MB MB
Surrogate Dil FacPrepared AnalyzedQualifier Limits%Recovery
Eurofins Calscience
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QC Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: 8015B - Gasoline Range Organics - (GC) (Continued)
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-399272/12
Matrix: Water Prep Type: Total/NA
Analysis Batch: 399272
Gasoline Range Organics
(C4-C13)
2000 1987 ug/L 99 71 -120
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
4-Bromofluorobenzene (Surr)20 -144
Surrogate
101
LCS LCS
Qualifier Limits%Recovery
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-399272/13
Matrix: Water Prep Type: Total/NA
Analysis Batch: 399272
Gasoline Range Organics
(C4-C13)
2000 1986 ug/L 99 71 -120 0 20
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
4-Bromofluorobenzene (Surr)20 -144
Surrogate
104
LCSD LCSD
Qualifier Limits%Recovery
Client Sample ID: Matrix SpikeLab Sample ID: 570-166793-B-1 MS
Matrix: Water Prep Type: Total/NA
Analysis Batch: 399272
Gasoline Range Organics
(C4-C13)
ND 2000 1774 ug/L 89 54 -125
Analyte
MS MS
DUnitResult Qualifier %Rec
Spike
Added
Sample
Result
Sample
Qualifier
%Rec
Limits
4-Bromofluorobenzene (Surr)20 -144
Surrogate
102
MS MS
Qualifier Limits%Recovery
Client Sample ID: Matrix Spike DuplicateLab Sample ID: 570-166793-B-1 MSD
Matrix: Water Prep Type: Total/NA
Analysis Batch: 399272
Gasoline Range Organics
(C4-C13)
ND 2000 1846 ug/L 92 54 -125 4 20
Analyte
MSD MSD
DUnitResult Qualifier %Rec
Spike
Added
Sample
Result
Sample
Qualifier
%Rec
Limits LimitRPD
RPD
4-Bromofluorobenzene (Surr)20 -144
Surrogate
107
MSD MSD
Qualifier Limits%Recovery
Method: 8015B - Diesel Range Organics (DRO) (GC)
Client Sample ID: Method BlankLab Sample ID: MB 570-398193/1-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398746 Prep Batch: 398193
RL MDL
Diesel Range Organics [C10-C28]ND 50 36 ug/L 01/03/24 18:16 01/05/24 13:12 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 66250 ug/L 01/03/24 18:16 01/05/24 13:12 1TPH as Motor Oil (C17-C44)
Eurofins Calscience
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QC Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: 8015B - Diesel Range Organics (DRO) (GC) (Continued)
Client Sample ID: Method BlankLab Sample ID: MB 570-398193/1-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398746 Prep Batch: 398193
n-Octacosane (Surr)124 53-151 01/05/24 13:12 1
MB MB
Surrogate
01/03/24 18:16
Dil FacPrepared AnalyzedQualifier Limits%Recovery
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-398193/2-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398746 Prep Batch: 398193
Diesel Range Organics
[C10-C28]
4000 4263 ug/L 107 65 -129
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
n-Octacosane (Surr)53 -151
Surrogate
107
LCS LCS
Qualifier Limits%Recovery
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-398193/3-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398746 Prep Batch: 398193
Diesel Range Organics
[C10-C28]
4000 4216 ug/L 105 65 -129 1 30
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
n-Octacosane (Surr)53 -151
Surrogate
109
LCSD LCSD
Qualifier Limits%Recovery
Method: 300.0 - Anions, Ion Chromatography
Client Sample ID: Method BlankLab Sample ID: MB 570-398248/5
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398248
RL MDL
Nitrite as N ND 0.10 0.043 mg/L 01/04/24 04:24 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
ND 0.0200.10 mg/L 01/04/24 04:24 1Nitrate as N
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-398248/6
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398248
Nitrite as N 2.50 2.664 mg/L 107 90 -110
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
Nitrate as N 5.00 4.888 mg/L 98 90 -110
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-398248/7
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398248
Nitrite as N 2.50 2.648 mg/L 106 90 -110 1 15
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
Nitrate as N 5.00 4.890 mg/L 98 90 -110 0 15
Eurofins Calscience
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QC Sample Results
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method: 300.0 - Anions, Ion Chromatography (Continued)
Client Sample ID: Matrix SpikeLab Sample ID: 570-166788-G-3 MS
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398248
Nitrite as N ND 2.50 2.912 mg/L 116 80 -120
Analyte
MS MS
DUnitResult Qualifier %Rec
Spike
Added
Sample
Result
Sample
Qualifier
%Rec
Limits
Nitrate as N 5.7 5.00 11.19 E mg/L 111 80 -120
Client Sample ID: Matrix Spike DuplicateLab Sample ID: 570-166788-G-3 MSD
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398248
Nitrite as N ND 2.50 2.888 mg/L 116 80 -120 1 20
Analyte
MSD MSD
DUnitResult Qualifier %Rec
Spike
Added
Sample
Result
Sample
Qualifier
%Rec
Limits LimitRPD
RPD
Nitrate as N 5.7 5.00 11.17 E mg/L 110 80 -120 0 20
Method: 1664A - HEM and SGT-HEM
Client Sample ID: Method BlankLab Sample ID: MB 570-398570/1-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398907 Prep Batch: 398570
RL MDL
HEM: Oil and Grease ND 1.00 0.510 mg/L 01/04/24 17:56 01/05/24 19:32 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier
Client Sample ID: Lab Control SampleLab Sample ID: LCS 570-398570/2-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398907 Prep Batch: 398570
HEM: Oil and Grease 40.0 31.40 mg/L 79 78 -114
Analyte
LCS LCS
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits
Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 570-398570/3-A
Matrix: Water Prep Type: Total/NA
Analysis Batch: 398907 Prep Batch: 398570
HEM: Oil and Grease 40.0 31.70 mg/L 79 78 -114 1 18
Analyte
LCSD LCSD
DUnitResult Qualifier %Rec
Spike
Added
%Rec
Limits LimitRPD
RPD
Eurofins Calscience
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QC Association Summary
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
GC/MS VOA
Analysis Batch: 398453
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 8260B570-166792-1 B-1 Total/NA
Water 8260BMB 570-398453/7 Method Blank Total/NA
Water 8260BLCS 570-398453/4 Lab Control Sample Total/NA
Water 8260BLCSD 570-398453/5 Lab Control Sample Dup Total/NA
GC VOA
Analysis Batch: 399272
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 8015B570-166792-1 B-1 Total/NA
Water 8015BMB 570-399272/14 Method Blank Total/NA
Water 8015BLCS 570-399272/12 Lab Control Sample Total/NA
Water 8015BLCSD 570-399272/13 Lab Control Sample Dup Total/NA
Water 8015B570-166793-B-1 MS Matrix Spike Total/NA
Water 8015B570-166793-B-1 MSD Matrix Spike Duplicate Total/NA
GC Semi VOA
Prep Batch: 398193
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 3510C570-166792-1 B-1 Total/NA
Water 3510CMB 570-398193/1-A Method Blank Total/NA
Water 3510CLCS 570-398193/2-A Lab Control Sample Total/NA
Water 3510CLCSD 570-398193/3-A Lab Control Sample Dup Total/NA
Analysis Batch: 398746
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 8015B 398193MB 570-398193/1-A Method Blank Total/NA
Water 8015B 398193LCS 570-398193/2-A Lab Control Sample Total/NA
Water 8015B 398193LCSD 570-398193/3-A Lab Control Sample Dup Total/NA
Analysis Batch: 399119
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 8015B 398193570-166792-1 B-1 Total/NA
HPLC/IC
Analysis Batch: 398248
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 300.0570-166792-1 B-1 Total/NA
Water 300.0MB 570-398248/5 Method Blank Total/NA
Water 300.0LCS 570-398248/6 Lab Control Sample Total/NA
Water 300.0LCSD 570-398248/7 Lab Control Sample Dup Total/NA
Water 300.0570-166788-G-3 MS Matrix Spike Total/NA
Water 300.0570-166788-G-3 MSD Matrix Spike Duplicate Total/NA
General Chemistry
Prep Batch: 398570
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 1664A570-166792-1 B-1 Total/NA
Water 1664AMB 570-398570/1-A Method Blank Total/NA
Eurofins Calscience
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QC Association Summary
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
General Chemistry (Continued)
Prep Batch: 398570 (Continued)
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 1664ALCS 570-398570/2-A Lab Control Sample Total/NA
Water 1664ALCSD 570-398570/3-A Lab Control Sample Dup Total/NA
Analysis Batch: 398907
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Water 1664A 398570570-166792-1 B-1 Total/NA
Water 1664A 398570MB 570-398570/1-A Method Blank Total/NA
Water 1664A 398570LCS 570-398570/2-A Lab Control Sample Total/NA
Water 1664A 398570LCSD 570-398570/3-A Lab Control Sample Dup Total/NA
Eurofins Calscience
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Lab Chronicle
Client: Ninyo & Moore Job ID: 570-166792-1
Project/Site: CARRILLO E.S.- WATER INTRUSION
Client Sample ID: B-1 Lab Sample ID: 570-166792-1
Matrix: WaterDate Collected: 01/02/24 09:30
Date Received: 01/03/24 18:40
Analysis 8260B CG01/04/24 18:091 EET CAL 4398453
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Instrument ID: GCMSXX
Analysis 8015B 1 399272 01/08/24 18:27 DPI EET CAL 4Total/NA 5 mL 5 mL
GC73Instrument ID:
Prep 3510C 398193 01/04/24 13:06 UFLU EET CAL 4Total/NA 250.1 mL 2.5 mL
Analysis 8015B 1 399119 01/08/24 13:46 SP9M EET CAL 4Total/NA 10 mL 10 mL
GC48Instrument ID:
Analysis 300.0 2 398248 01/04/24 06:15 YO8L EET CAL 4Total/NA 4 mL 4 mL
IC9Instrument ID:
Prep 1664A 398570 01/04/24 17:56 YTB4 EET CAL 4Total/NA 1050 mL 1000 mL
Analysis 1664A 1 398907 01/05/24 19:32 KH3Z EET CAL 4Total/NA
NO EQUIQInstrument ID:
Laboratory References:
EET CAL 4 = Eurofins Calscience Tustin, 2841 Dow Avenue, Tustin, CA 92780, TEL (714)895-5494
Eurofins Calscience
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Accreditation/Certification Summary
Client: Ninyo & Moore Job ID: 570-166792-1
Project/Site: CARRILLO E.S.- WATER INTRUSION
Laboratory: Eurofins Calscience
Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.
Authority Program Identification Number Expiration Date
California State 3082 07-31-24
The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes
for which the agency does not offer certification.
Analysis Method Prep Method Matrix Analyte
300.0 Water Nitrate as N
300.0 Water Nitrite as N
8260B Water 1,1,2-Trichloro-1,2,2-trifluoroethane
8260B Water 1,1-Dichloropropene
8260B Water 1,2,3-Trichlorobenzene
8260B Water 1,2,4-Trimethylbenzene
8260B Water 1,3,5-Trimethylbenzene
8260B Water 1,3-Dichloropropane
8260B Water 2,2-Dichloropropane
8260B Water 2-Butanone
8260B Water 2-Chlorotoluene
8260B Water 2-Hexanone
8260B Water Acetone
8260B Water Ethanol
8260B Water Isopropylbenzene
8260B Water p-Isopropyltoluene
8260B Water Vinyl acetate
Oregon NELAP 4175 02-02-24
Eurofins Calscience
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Method Summary
Job ID: 570-166792-1Client: Ninyo & Moore
Project/Site: CARRILLO E.S.- WATER INTRUSION
Method Method Description LaboratoryProtocol
SW8468260BVolatile Organic Compounds (GC/MS)EET CAL 4
SW8468015BGasoline Range Organics - (GC)EET CAL 4
SW8468015BDiesel Range Organics (DRO) (GC)EET CAL 4
EPA300.0 Anions, Ion Chromatography EET CAL 4
1664A1664AHEM and SGT-HEM EET CAL 4
1664A1664AHEM and SGT-HEM (Aqueous)EET CAL 4
SW8463510CLiquid-Liquid Extraction (Separatory Funnel)EET CAL 4
SW8465030CPurge and Trap EET CAL 4
Protocol References:
1664A = EPA-821-98-002
EPA = US Environmental Protection Agency
SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates.
Laboratory References:
EET CAL 4 = Eurofins Calscience Tustin, 2841 Dow Avenue, Tustin, CA 92780, TEL (714)895-5494
Eurofins Calscience
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Sample Summary
Client: Ninyo & Moore Job ID: 570-166792-1
Project/Site: CARRILLO E.S.- WATER INTRUSION
Lab Sample ID Client Sample ID Matrix Collected Received
570-166792-1 B-1 Water 01/02/24 09:30 01/03/24 18:40
Eurofins CalsciencePage 26 of 28 1/9/2024
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=::: eurofins I
Cal science
Loe: 570
1667 92
7440 Lincoln Way, Garden Grove, CA 92841-1427 • (714) 895-5494
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DATE:
CHAIN OF CUSTODY RECORD
1.2.24 -----------------
PAGE: 1 OF 1 --------------For courier service/ sample drop off information, contact us26 sales@eurofinsus.com or call us. :-:-:-:-:-:-:-:-:-:-: .... :.:-:-:-:-:-:-:-:-:-·-· ....
LABORATORY CLIENT: CLIENT PROJECT NAME/ NUMBER: P.O. NO.: Ninyo & Moore
ADDRESS: Cn..rri 11111=. c,, Wri-:J.~.r l-1\Ji-ru.c;~il\10S822013
5710 Ruffin Road PROJECT CONTACT: v• SAMPLER(S): (PRINT)
CITY:
San Diego
STATE: ZIP:
CA 92123 Nathan Diem Jakob Montgomery
TEL: E-MAIL: 510.584.7217 ndiem@ninyoandmoore.com REQUESTED ANALYSES
TURNAROUND TIME (Rush surcharges may apply to any TAT not "STANDARD"): Please check box or fill in blank as needed.
□ SAME DAY □ 24 HR □ 48 HR □ 72 HR □ 5 DAYS X STANDARD <( ;::::
GLOBAL ID: □ COELT EDF
SPECIAL INSTRUCTIONS:
ECI project# 57017804 / Virendra Patel
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SAMPLE ID SAMPLING
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Date:
Time:
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Time:
06/02/14 Revision
■
Login Sample Receipt Checklist
Client: Ninyo & Moore Job Number: 570-166792-1
Login Number: 166792
Question Answer Comment
Creator: Perez Solis, Daniel
List Source: Eurofins Calscience
List Number: 1
N/ARadioactivity wasn't checked or is </= background as measured by a survey
meter.
TrueThe cooler's custody seal, if present, is intact.
TrueSample custody seals, if present, are intact.
TrueThe cooler or samples do not appear to have been compromised or
tampered with.
TrueSamples were received on ice.
TrueCooler Temperature is acceptable.
TrueCooler Temperature is recorded.
TrueCOC is present.
TrueCOC is filled out in ink and legible.
TrueCOC is filled out with all pertinent information.
TrueIs the Field Sampler's name present on COC?
TrueThere are no discrepancies between the containers received and the COC.
TrueSamples are received within Holding Time (excluding tests with immediate
HTs)
TrueSample containers have legible labels.
TrueContainers are not broken or leaking.
TrueSample collection date/times are provided.
TrueAppropriate sample containers are used.
TrueSample bottles are completely filled.
TrueSample Preservation Verified.
TrueThere is sufficient vol. for all requested analyses, incl. any requested
MS/MSDs
TrueContainers requiring zero headspace have no headspace or bubble is
<6mm (1/4").
TrueMultiphasic samples are not present.
TrueSamples do not require splitting or compositing.
N/AResidual Chlorine Checked.
Eurofins Calscience
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Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | September 16, 2024
APPENDIX D
Response and Supplemental Recommendations Letter
(Ninyo & Moore, 2024b)
5710 Ruffin Road | San Diego, California 92123 | p. 858.576.1000 | www.ninyoandmoore.com
August 23, 2024 Project No. 108822013
Ms. Tova Corman San Marcos Unified School District 255 Pico Avenue, Suite 100 San Marcos, California 92069
Subject: Responses to Geotechnical Report Review Comments and Supplemental Recommendations Carrillo Elementary School
2875 Poinsettia Lane, Carlsbad, California
Dear Ms. Corman:
As requested, we have prepared this letter providing our responses to the City of Carlsbad
geotechnical report review comments letter dated August 4, 2024 regarding our geotechnical
evaluation for the Carrillo Elementary School Field Turf Replacement project dated
May 17, 2024. Our responses are included herein.
In addition to the comment responses provided below, at the request of the project civil engineer,
we are providing supplemental recommendations for the replacement flexible pavements for fire
lanes and pedestrian sidewalks in the western parking lot and driveway entrance to the school
campus. The recommendations provided in this letter are considered supplementary and the
previous recommendations, findings, and conclusions presented in the original report
(Ninyo & Moore, 2024a) and addendum (Ninyo & Moore, 2024b) remain applicable and valid.
Comment 1: Please provide a statement addressing the potential impact of the proposed project
on adjacent off-site properties from a geotechnical standpoint.
Response: Provided the recommendations in the referenced report (Ninyo & Moore, 2024a) and
addendum (Ninyo & Moore, 2024b) are incorporated into the design and construction of the
proposed project, the proposed project is not anticipated to adversely impact the adjacent off-site
properties.
JVin90&,v\OOl"'e
Geotechnical & Environmental Sciences Consultants
Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | August 23, 2024
Comment 2: With respect to possible dewatering that may be performed by the contractor to facilitate the proposed earthwork and construction of the French drain system, please provide a
discussion addressing the potential impact of dewatering on the existing adjacent
school structures and/or city ROW (Poinsettia Lane and Melrose Drive) bounding the project site. Please provide recommendations as necessary to address possible dewatering
and prevent adverse impact to existing structures/improvements and city ROW bounding the subject site.
Response: Dewatering measures, if needed to facilitate the construction operations for the
proposed project, are anticipated to result in relatively minor drawdown of the perched water
conditions at the site. Due to the potential for a limited amount of drawdown, settlements from
potential dewatering measures are anticipated to be negligible. Accordingly, we do not anticipate
that site dewatering efforts for the proposed project to adversely impact existing onsite structures
or the and adjacent Right-of-Way (ROW) improvements.
Comment 3: Please clarify the recommendations for the frequency of testing to confirm that the
specifications for the cement treated soil (CTS) are being met during the proposed earthwork construction.
Response: We recommend that 1 field density test be performed for every 5,000 square feet of
cement treated soil (CTS) subgrade or fraction thereof, with no less than 2 field density tests being
performed per day of placement. Additionally, the cement application rate should be periodically
monitored during the application process. Due to no specific compressive strength
recommendation for this project, we do not consider the performance of unconfined compressive
strength testing to be needed.
Comment 4: Please provide the type of pipe (Sch. 40 PVC, etc.) that is recommended for the proposed French drain system.
Response: From a geotechnical standpoint, we recommend that the piping for the French drain
system consists of Schedule 40 polyvinyl chloride (PVC) pipe or an equivalent. Pipe material
and specifications should be further evaluated by the project civil engineer.
Comment 5: Please provide a summary list of the geotechnical observations/testing services
that should be provided during the construction of this project.
Response: We recommend that the geotechnical observations/testing services during
construction include the following:
•Geologic/engineering field services to evaluate the suitability of remedial excavations,temporary cut slopes, and foundation excavations including drilled pier foundationexcavations.
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Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | August 23, 2024
• Field observation and in-place density testing during grading operations including such items as general site work, trench backfill, retaining wall backfill, CTS subgrade preparation, subgrade preparation, and pavement construction.
• Laboratory testing of the soils used during the earthwork and paving operations.
FLEXIBLE FIRE LANE PAVEMENT – WESTERN PARKING LOT
Based on our discussions with the project civil engineer, we understand that portions of the
existing asphalt concrete (AC) fire lane in the western parking lot are to be reconstructed. For
the design of the new reconstructed AC fire lane, we have used an assumed design R-value of
5 and a Traffic Index (TI) 7 for the basis of the preliminary design. The R-value of 5 is based on
the information presented in the original site geotechnical report (Kleinfelder, 1998) for the school
development that also used a design R-value of for the site pavements. The preliminary
recommended flexible pavement section is presented in Table 1 below.
Table 1 – Preliminary Flexible Pavement Sections for Western Parking Lot Fire Lane
Traffic Index (Pavement Usage) Design R-Value
Asphalt Concrete Thickness (inches)
Aggregate Base Thickness (inches)
7 (Fire Lanes) 5 4 15
As indicated, the section assumes a TI of 7.0 for the fire lane. If traffic loads are different from
those assumed, the pavement design should be re-evaluated. We recommend that the upper
12 inches of subgrade soils and the layer of aggregate base materials be compacted to a relative
compaction of 95 percent relative density as evaluated by the current version of ASTM
International (ASTM) D 1557. New fire lanes that are constructed in accordance with the
recommendations provided herein are considered to be an all-weather surface that can support
72,000 pounds of vehicle loading and HS-20 loading conditions
PEDESTRIAN SIDEWALKS - WESTERN PARKING LOT
Exterior pedestrian concrete sidewalks should be 4 inches in thickness and should be reinforced
with No. 3 reinforcing bars placed at 24 inches on-center both ways. A vapor retarder is not
needed for exterior pedestrian concrete sidewalks. To reduce the potential manifestation of
cracks to exterior concrete flatwork due to movement of the underlying soil, we recommend that
the sidewalks be installed with crack-control joints at an appropriate spacing as designed by the
civil engineer. This assumes that the sidewalks are underlain by subgrade soils that possess a
very low to low expansion index (i.e., an expansion index of 50 or less). The subgrade soils
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Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | August 23, 2024
should be scarified to a depth of 8 inches, moisture conditioned to generally at or slightly above
the laboratory optimum moisture content, and compacted to a relative compaction of 90 percent
as evaluated by ASTM D 1557.
In the event that expansive, clayey soils (i.e., expansion index of 50 or more, as evaluated by
ASTM D 4829) are exposed at the subgrade elevation, the upper 12 inches of expansive soil
subgrade should be removed and replaced with materials that possess a very low to low
expansion index (i.e., an expansion index of 50 or less) that are moisture conditioned to generally
at or slightly above the laboratory optimum moisture content and compacted to a relative
compaction of 90 percent as evaluated by ASTM D 1557. The removals, if needed, should
extend beyond the edge of the sidewalk for a horizontal distance of 1 foot or more.
We appreciate the opportunity to be of service.
Respectfully submitted, NINYO & MOORE
Christopher T. Frank Senior Staff Engineer Jeffrey T. Kent, PE, GE Principal Engineer
CTF/JTK/mp
Attachment: References
LL
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Ninyo & Moore | 2875 Poinsettia Lane, Carlsbad, California | 108822013 | August 23, 2024
REFERENCES
City of Carlsbad, 2024, Geotechnical Report Review, Cabrillo Elementary School Playfield Repair, (1st Review), Project ID PD2024-0012, Grading Permit No. GR2024-0014: dated August 4.
Kleinfelder, 1998, Geotechnical Investigation and Geologic/Seismic Hazards Study for Rancho Carrillo School, San Marcos Unified School District, Carlsbad, California, Kleinfelder Job No. 51-4816-001: dated August 3.
Ninyo & Moore, 2024a, Update Geotechnical Evaluation, Field Turf Replacement, Carrillo Elementary School, 2875 Poinsettia Lane, Carlsbad, California, Project No. 108822013: dated May 17.
Ninyo & Moore, 2024b, Addendum to Geotechnical Evaluation, Supplemental Pavement Recommendations, Carrillo Elementary School, 2875 Poinsettia Lane, Carlsbad, California,
Project No. 108822013: dated August 13.
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