HomeMy WebLinkAboutCT 00-13; TABATA PROPERTY; ADDENDUM TO FINAL REPORT OF TESTING AND OBSERVATION SERVICES PERFORMED DURING CONSTRUCTION OF SITE IMPROVEMENTS; 2005-12-01cr oo-;
ADDENDUM TO FINAL REPORT OF
TESTING AND OBSERVATION
SERVICES PERFORMED DURING
CONSTRUCTION OF
SITE IMPROVEMENTS
TABATA PROPERTY
CARLSBAD, CALIFORNIA
PREPARED FOR
LUCAS & MERCOER DEVELOPMENT
CARLSBAD, CALIFORNIA
DECEMBER 1, 2005
PROJECT NO. 06542-52-03
YcT,n-, 0/',41/7 t "?&
I GEOCON
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INCORPORATED
GEOTECHNICAL CONSULTANTS
Project No. 06542-52-03
December 1, 2005
Lucas & Mercier Development
5780 Fleet Street, Suite 320
Carlsbad, California 92008
Attention: Mr. Mike Lake
I Subject: TABATA PROPERTY
CARLSBAD, CALIFORNIA
ADDENDUM TO FINAL REPORT OF TESTING AND OBSERVATION
SERVICES PERFORMED DURING CONSTRUCTION OF SITE IMPROVEMENTS
Reference: Final Report of Testing and Observation Services Performed During Construction of
I Site Improvements, Tabata Property, Carlsbad, California, prepared by Geocon
Incorporated, dated May 24, 2004 (Project No. 06542-52-03).
I Gentlemen:
I In accordance with your request, we have provided additional testing and observation services during
the construction of site improvements subsequent to the issuance of the referenced report. The scope
of our services consisted of performing in-place density and moisture content tests on an "on-call"
I basis during the preparation of subgrade soils for sidewalk and curb and gutter and during the
placement of asphalt concrete pavement.
In-place density tests were performed using a nuclear density gauge in accordance with ASTM Test
Procedure D 2922-01 for soil and D 2950-91 for asphalt concrete. Laboratory tests on soil and
aggregate base samples were performed in accordance with ASTM Test Procedures D 1557-02,
Maximum Dry Density and Optimum Moisture Content and D 422-63, Sieve Analysis. Laboratory
tests on asphalt concrete samples were performed in accordance with ASTM Test Procedures
D 2726-04, Hveem Density; D 2041-03a, Theoretical Maximum Density; D 1560-92, Stability;
D 6307-04, Asphalt Content; and C 136-01, Sieve Analysis. The results of the field tests are
summarized on Table I, and the results of the laboratory tests are summarized on Tables II
through IV.
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6960 Flanders Drive 0 San Diego, California 92121-2974 0 Telephone (858) 558-6900 0 Fax (858) 558-6159
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Results of the in-place density tests indicate that the sidewalk subgrade materials possess a dry
density of at least 90 percent of the laboratory maximum dry density near to slightly above optimum
moisture content at the locations tested. Similarly, dry densities of at least 95 percent of the
laboratory maximum dry density near to slightly above optimum moisture content were achieved on
subgrade for curb and gutter at the locations tested. Densities of at least 95 percent of the laboratory
Hveem density were achieved on asphalt concrete at the locations tested.
Should you have any questions regarding this report, or if we may be of further service, please
contact the undersigned at your convenience.
Very truly yours,
GEOCON INCORPORATED
6JHoobs
G 1524
Shawn Weedon
RCE 61803
(4/pkp) Addressee
*
Project No. 06542-52-03 - 2 - December 1, 2005
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TABLE I
I SUMMARY OF FIELD DENSITY TEST RESULTS
Elev. Plus Field Field Field Reqd.
I
or Depth
3/4
Curve Rock
Dry
Dens.
Moist.
Cont.
Rel.
Comp.
Rel.
Comp.
Test No. Date Location (it) No. (%) (pcO (%) (%) (%)
SW 36 10/07/05 NofCabellaPl&Docenand 0
SW 37 11/14/05 Thrasher& Songbird 0
3 0
3 0
115.3
114.7
12.6
11.3
92
92
90
90
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1
1
1
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Project No. 06542-52-03
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December 1, 2005
TABLE I
SUMMARY OF FIELD DENSITY TEST RESULTS
Elev. Plus Field Field Field Reqd.
or 3/4 Dry Moist. Rel. Rel.
Depth Curve Rock Dens. Cont. Comp. Comp.
Test No. Date Location t) No. (%) (pcf) (%) (%) (%)
CG 40 10/07/05 CabellaPi Inlet 5 D 0 2 0 122.1 12.0 95 95
CG 41 10/07/05 Cabella P1 Curb Radius 0 2 0 122.8 10.6 95 95
CO 42 10/07/05 Docenand 0 2 0 127.9 11.0 99 95
CO 43 11/14/05 Lot 1; Thrasher Pl 0 4 0 140.2 4.8 96 95
Project No. 06542-52-03 November 30, 2005
December 1, 2005
TABLE I
SUMMARY OF FIELD DENSITY TEST RESULTS
Test No. Date Location
AC 1 10/14/05 CabellaPi 5a R C ,0
AC 2 10/14/05 Cabella P1 S OP Ct
Field Reqd.
Field Rel. Rel.
Sample Dens. Comp. Comp.
No. (pcf) (%) (%)
AC4 144.3 95 95
AC4 143.9 95 95
Project No. 06542-52-03
TABLE I
EXPLANATION OF CODED TERMS
- TEST SUFFIX
A, B, C,. . . : Retest of previous density test failure, following moisture conditioning and/or recompaction.
- STRIKE-OUT
Fill in area of density test failure was removed and replaced with properly compacted fill soil.
- PREFIX CODE DESIGNATION FOR TEST NUMBERS
AC - ASPHALT CONCRETE CG -CURB AND GUTTER
SW - SIDEWALK
CURVE NO.
Corresponds to curve numbers listed in the summary of laboratory maximum dry density and optimum
moisture content test results table for selected fill soil samples encountered during testing and observation.
- ROCK CORRECTION
For density tests with rock percentage greater than zero, laboratory maximum dry density and optimum
moisture content were adjusted for rock content. For tests with rock content equal to zero, laboratory
maximum dry density and optimum moisture content values are unadjusted.
- TYPE OF TEST
SC: Sand Cone Test (ASTM D1556)
NU: Nuclear Density Test (ASTM D2922)
OT: Other
- ELEVATION/DEPTH
Test elevations/depths have been rounded to the nearest whole foot.
December 1, 2005
TABLE II
SUMMARY-OF LABORATORY MAXIMUM DRY DENSITY AND
OPTIMUM MOISTURE CONTENT TEST RESULTS
ASTM D 1557-02
Sample Maximum Optimum
No. ' Description Dry Density Moisture Content
(pet) (% dry weight)
1 1 Orange brown, Silty, fine SAND 120.3 13.7
2 Reddish brown, Clayey, fine to medium SAND, 128.9 9.1 with silt
Reddish brown, Silty, fine to medium SAND, 125.3 11.6
with trace clay
4 Class 2 aggregate base 146.2 4.9
TABLE III
SUMMARY OF LABORATORY TEST RESULTS FOR ASPHALT CONCRETE
ASTM D 2726-04, D 2041-03A, AND D 1560-92
Sample
No.
Test Greenbook
Specifications Aggregate Theoretical Hveem Percent I
Size (inches) Maximum Maximum Air Voids I Stability (Stability)
Density (pci) Density (pci)
AC-4 ½ 158.7 I 151.7 4 39 ~35
TABLE IV
SUMMARY OF LABORATORY ASPHALT CONCRETE GRADATION
AND ASPHALT CONTENT TEST RESULTS
ASTM C 136-01 AND D 6307-98
1/2-Inch Aggregate Greenbook Section 400-4.3 Test Type
Sample N o. AC-4 Specifications Class C3
Sieve Analysis ASTM C 136-01
(Sieve Size) (% passing) (% passing)
3/4 inch 100 100
½ inch 96 89-100
% inch 85 74-100
No. 4 56 50-78
No. 8 37 32-60
No. 30 19 14-38
No. 200 7 2-10
Oil Content (%)* 5.4 4.6-7.0
* Greenbook refers to as "Asphalt %"
Project No. 06542-52-03 December 1, 2005