HomeMy WebLinkAboutCT 13-05; STATE STREET TOWNHOMES; SUPPLEMENTAL COMPACTION REPORT; 2018-08-20ADVANCED GEOTECHNICAL SOLUTIONS, INC.
485 Corporate Drive, Suite B )AGS Telephone:
Escondido, California 92029
(619) 867-0487 Fax: (714) 409-3287
NEW POINTE COMMUNITIES, INC. August 20, 2018
16880 West Bernardo Drive, Suite 230 P1W 1701-13
San Diego, CA 92127 Report No. 1701-13-C-8
Attention: Mr. Tyler Sandstrom
Subject: Supplemental Compaction Report, Masonry Retaining Walls, Golden Surf
Residential Development, 1000 Camino De Las Ondas, City of Carlsbad, San Diego
County, California
References: See Appendix
In accordance with your request, Advanced Geotechnical Solutions, Inc. (AGS) has prepared this report
summarizing our observation and test results collected during the construction of the Masonry Retaining
walls at the Golden Surf Residential Development, 1000 Camino Dc Las Ondas in the City of Carlsbad,
California. The specific locations of these walls are shown on Plates 1 through 3 (utilizing the most
current Retaining Wall Addition Exhibit as a base).
The subject walls were constructed as part of the ongoing development of the Golden Surf project. The
subject walls were constructed under the periodic observation and testing of AGS. Specifically, AGS
personnel conducted the following services during the construction of the subject wall:
Observed footing excavations to verify that the footings were founded in firm competent
materials;
Conducted periodic observations to verify Masonry retaining walls were constructed in general
conformance to the plans and recommendations presented in the referenced reports and the San
Diego Regional Standard Drawings.
. Observed wall backdrains.
Provided periodic compaction testing of the backfill to verify the minimum compaction criteria
(minimum of 90% of the laboratory maximum density per ASTM D-1557) was meet;
During the placement of the masonry wall backfill, representatives of AGS observed and conducted
periodic compaction testing. In general, the majority of the wall backfill consisted of crushed rock
(3/4inch) capped with approximately 12 to 18 inches of locally derived soils. During the backfill
operations the wall backfill was moisture conditioned to or slightly above optimum moisture content,
placed in thin, loose lifts (approximately 12 inches), and compacted to a minimum of 90 percent of the
laboratory maximum dry density in accordance with ASTM Test Method D-1557. Compaction was
achieved utilizing a vibratory and hand operated tampers.
ORANGE AND L.A. COUNTIES INLAND EMPIRE SAN DIEGO AND IMPERIAL COUNTIES
(714) 786-5661 (619) 867-0487 (619) 867-0487
August 20, 2018 Page 2
P1W 1701-03 Report No. 1701-13-C-8
A summary of compaction tests pertaining to wall construction is presented in Table 1. The compaction
test locations are shown on Plates 1 through 3.
This report presents information and data relative to grading operations for the subject site.
Representative(s) of this firm conducted periodic tests and made observations during the progress of the
construction in an effort to evaluate whether compliance with the project drawings, specifications and
applicable Building Codes was being obtained. The presence of our personnel during the work progress
did not involve any direct supervision of the contractor or his work forces and does not relieve the
contractor of the primary responsibility to perform all work in accordance with the project specifications
and Code requirements. Professional and technical advice and suggestions were provided to the owner
and/or his designated representative based upon our observations.
The opportunity to be of service is sincerely appreciated. If you should have any questions, please do not
hesitate to contact the undersigned.
Respectfully Submitted,
Advanced Geotechnical Solutions, Inc.
Prepared by:
—Th
SHANE P. SMITH
Staff Engineer
Distribution: (1) Addressee
Attachments: Appendix- References
Table I (Compaction Tests)
Plates 1-3 (Compaction Test Plan)
Reviewed by:
RCE 46544/GE 2314, Reg. Exp. 6-30-19
co
No. 2314
ADVANCED GEOTECHNICAL. SOLUTIONS, INC.
August 20, 2018 Page 3
P/W 1701-03 Report No. 1701-13-C-8
APPENDIX, REFERENCES
Advanced Geotechnical Solutions, Inc., (AGS), "Preliminary Geotechnical Investigation, Proposed
Golden Surf Residential Development, 1000 Camino De Las Ondas, City of Carlsbad, San Diego
County, California" dated March 6, 2017, Report No. 1701-13-B-2
Advanced Geotechnical Solutions, Inc., (AGS), "Foundation Plan Review for Golden Surf Residential
Development, 1000 Camino De Las Ondas, City of Carlsbad, San Diego County, California" dated
August 29, 2017, Report No. 1701-13-B-D-4
Advanced Geotechnical Solutions, Inc., (AGS), "Project Grading Report, Lot 1 (Units 1 through 4) and
Lot 2, Golden Surf Residential Development, 1000 Camino Dc Las Ondas, City of Carlsbad, San
Diego County, California" dated October 24 , 2017, Report No. 1701-13-C-5
ADVANCED GEOTECHNICAL SOLUTIONS, INC.
August 20, 2018 SUMMARY OF LABORATORY Page 1 of Table 1
P/W 1701-13 MAXIMUM DRY DENSITY AND Report No. 1701-13-C-8
OPTIMUM MOISTURE CONTENT
TABLE 1
OPTIMUM MAXIMUM
MOISTURE DRY
CONTENT DENSITY
SOIL TYPE DESCRIPTION (%) (pcf)
A Brown silty sand 9.0 128.5
B Reddish Brown silty sand 8.5 133.0
E Reddish brown silty sand 7.5 132.5
I
ADVANCED GEOTECHNICAL SOLUTIONS, INC.
August 20, 2018 FIELD DENSITY TEST RESULTS Page 2 of Table 1
P1W 1701-13 TABLE 1 (cont'd) Report No. 1701-13-C-8
TEST NUMBER/LOCATION/ELEVATION KEY
S - Sewer Trench I - Irrigation Trench SD - Storm Drain Trench E - Electrical Trench iT - Joint Utility Trench W - Water Trench RTW - Retaining Wall FTG - Footing FG - Finish Grade
SG - Subgrade CG - Curb and Gutter Subgrade B - Base AC - Asphalt Concrete Finish Grade BC - Asphalt Concrete Base Course CC - Asphalt Concrete Cap Course -R,R1,R2 - Indicates Retest
ROCK Correction- Estimated Percent Retained on #4 Sieve (Method A) or 3/4 inch (Method C), Maximum Dry Density and Optimum Moisture Content adjusted per ASTM D 4718
Date
Test
Number Location
Depth
or
Elev.
Soil
Type
Rock
Corr.*
Moisture
(%)
Dry Density
(pcf)
Rel.
Comp.
(%)
Proj.
Spec.
(%)
Test
Type
(S/N)
Pass
or
Fail Opt. Field Max. Field
10/13/17 140RTW Lot 2 168 A 9.0 11.8 128.5 117.0 91 90 N Pass
10/13/17 141RTW Lot 2 169 A 9.0 11.6 128.5 119.4 92 90 N Pass
10/16/17 144RTW Lot 2 167 E 7.5 9.7 132.5 119.8 90 90 N Pass
10/16/17 145RTW Lot 2 169 E 7.5 11.2 132.5 120.6 91 90 N Pass
10/16/17 147RTW Lot 2 170 E 7.5 - 10.6 132.5 122.4 92 90 N Pass
10/17/17 150RTW Lot 2 171 E 7.5 9.6 1 132.5 123.4 93 90 N Pass
10/17/17 151RTW Lot 1 - Unit 1 166 B 8.5 8.9 133.0 121.7 91 90 N Pass
10/17/17 152RTW Lot 1 - Unit 2 165 1 B 8.5 9.4 133.0 122.5 92 90 N Pass
10/18/17 156RTW Lot 2 170 E 7.5 11.2 132.5 121.0 91 90 N Pass
10/18/17 157RTW Lot 1 - Unit 1 167 B 8.5 9.1 1 133.0 125.7 94 90 N Pass
10/18/17 159RTW Lot 1 - Unit 2 167 B 8.5 10.7 133.0 121.7 91 90 N Pass
10/19/17 160RTW Lot 1 - Unit 1 169 B 8.5 11.2 133.0 123.9 93 90 N Pass
10/19/171161RTW Lot 1 - Unit 2 168 B 8.5 9.6 133.0 121.2 91 90 N Pass
08/13/18 166RTW Lot 2 164 B 8.5 11.2 133.0 109.2 82 90 N Fail
08/13/18 167RTW Lot 2 164 B 8.5 6.2 133.0 111.2 83 90 N Fail
08/13/18 168RTW Lot 2 164 B 8.5 7.0 133.0 110.4 83 90 N Fail
08/13/18 169RTW Lot 1 166 B 8.5 7.2 133.0 115.1 86 90 N Fail
08/13/18 170RTW Lot 1 166 B 8.5 7.1 133.0 109.5 82 90 N Fail
08/20/18 166RTW-R Lot 2 164 B 8.5 9.1 133.0 121.7 91 90 N Pass
08/20/18 167RTW-R Lot 2 164 B 8.5 9.4 133.0 121.2 91 90 N Pass
ADVANCED GEOTECHNICAL SOLUTIONS, INC.
August 20, 2018 FIELD DENSITY TEST RESULTS Page 3 of Table 1
P1W 1701-13 TABLE 1 (cont'd) Report No. 1701-13-C-8
TEST NUMBER/LOCATION/ELEVATION KEY
S - Sewer Trench I - Irrigation Trench SD - Storm Drain Trench E - Electrical Trench iT - Joint Utility Trench W - Water Trench RTW - Retaining Wall FTG - Footing FG - Finish Grade
SG - Subgrade CG - Curb and Gutter Subgrade B - Base AC - Asphalt Concrete Finish Grade BC - Asphalt Concrete Base Course CC - Asphalt Concrete Cap Course -R,R1,R2 - Indicates Retest
* Rock Correction- Estimated Percent Retained on #4 Sieve (Method A) or 3/4 inch (Method C), Maximum Dry Density and Optimum Moisture Content adjusted per ASTM D 4718
Date
Test
Number Location
Depth
or
Elev.
Soil
Type
Rock
Corr.*
Moisture
(%)
Dry Density
(pcf)
Rel.
Comp.
(%)
Proj.
Spec.
(%)
Test
Type
(S/N)
Pass
or
Fail Opt. Field Max. Field
08/20/18 168RTW-R Lot 2 164 B 8.5 9.8 133.0 122.6 92 90 N Pass
08/20/18 169RTW-R Lot 1 166 B 8.5 10.1 133.0 121.8 91 90 N Pass
08/20/18 170RTW-R Lot 1 166 B 8.5 1 10.7 133.0 1 121.5 91 90 N Pass
ADVANCED GEOTECHNICAL SOLUTIONS, INC.
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5 0 5 10 15 RETAINING WALL ADDITION EXHIBIT FOR: I I I GOLDEN SURF GP496-4A
SCALE: 1" = 5 LOT 1 - UNIT 2