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Home My WebLink AboutCT 11-02; LA COSTA VISTA; AS-BUILT COMPACTION REPORT; 2016-02-20-I5TRA GEDCO 310.968.2999, HjNaH1 Nrs stratatech@yahoo. corn TA-TED N.5ULTA February 20, 2016 W.O. 263810 Tony Sfreddo D.S. Products, Inc. 24 Amberleaf Irvine, California, 92614 Subject: Final As-Built Compaction Report, Multi Family Residential Development, 7500 Jerez Court, Carlsbad, California Reference: STRATA-TECH, INC., Geotechnical Engineering Investigation of Proposed Multi Family Residential Development, 391 Tamarack Avenue, Carlsbad, California., Dated October 4, 2011 Gentlemen: Submitted herewith is the Final As-Built Compaction Report for the subject site. The grading operation was conducted between April 7, 2014, and July 21, 2015, the building installation and driveways were iconstructed between November 2014 and September, 2015 utilizing the referenced preliminary report. Observations of the grading, foundations and driveway subgrades were provided by" STRATA-TECH, Inc. PLACEMENT OF STRUCTURAL FILL Compacted fill was placed on the subject site to provide adequate support for the proposed 2- story Multi Family Residential Development OBSERVATIONS DURING GRADING Preparation for placement of a compacted fill included overexcavation to approximately 3 feet below existing grade, and 5-feet beyond the building foundation to provide a minimum of 2-foot of compacted fill under the footings of the proposed building. Prior to placement of fill, the bottom was made level, scarified, watered and tamped smooth. 1920 Pacific Avenue, Unit 16060, Long Beach California, CA 90806 STRATA-T,E C H ,IN C. 6 ED C ON S U L T A N T S D.S. Products, Inc. 2 W.O.263810 As-Built Compaction Report February 20, 2016 Subsequent fills were placed in 6 to 8 inch loose lifts and compacted to a minimum of 90 percent. The pads were raised approximately 3 feet in the back to allow for drainage toward Jerez court. Driveway Construction The area north of the building was fine graded for the PCC Paved Driveway over storm water infiltration systemLand parking. / Approximate locations of utilities are. Foundations Foundations were excavated per plan and penetrate the bearing soils a min of 24" Backfill Interior and exterior utility trenches were backfilled and compacted and shown on Plate A. TESTING Maximum density optimum moisture relationship determinations were performed for each soil type encountered during grading operations. Test results were as follows: Laboratory Standard: (ASTM: D-1557-91) 4 inch dia. mold; 1/30 cu.ft.vol.; 5 layers-25 blows per layer; 10 lb. hammer dropped 18 inches Soil Tpc Classification Optimum Moisture % Max.Dry Density; lbs/ft3 Light Brown Fine clayey 12 128.0 Sand Import, Brown clay Sand 10 132.0 w/rockchips Compaction tests were performed a minimum of every 2 feet and/or 500 cubic yards of compacted fill soils placed. These tests were performed in accordance with ASTM: D-2922-91 (nuclear gauge) or ASTM:D-1557-04 (sand cone) test methods. The test results are summarized in Table I. The approximate test locations are shown on Plate A. Areas not tested 'iere probed to show adequate compaction. STRATA-TECH,INC. GE 0 C ON S U LTA NT S D.S. Products, Inc. 3 W.O.263810 As-Built Compaction Report February 20, 2016 REGULATORY COMPLIANCE All cuts, fills or processing of original ground under the purview of this report have been completed under the observation of and with selective testing by STRATA-TECH, Inc., and found to be in compliance with the Grading Code of the City of Carlsbad. The completed work has been observed by STRATA-TECH, Inc., and is considered adequate for the development. Our findings were made and recommendations prepared in accordance with generally accepted professional engineering practices, and no further warranty is implied nor made. This report is subject to review by the controlling authorities for this project. We appreciate this opportunity to be of service to you.. Respectfully submitted: STRATA-TECH; Inc. Roland Acuña Larry Finley President RCE 46606 Enclosures: Compaction Test Results Plate A - Compaction Test Map C. 9TPATATEOHHNC. ECONULTANTS 310. 968. 2999 stratatech(ED-yahoo.com COMPACTION TEST RESULTS Test No. Location Below Proposed Grade (ft) Moisture Content Dry Unit Weight Soil Type (Lbs/fl3 ) °oRelative Comaction p !)ate I Building Pad 5 12.3 116.9 I 9% 4/7/14 2 Building Pad, 3 11.8 116.7 I 90% 3 Building Pad. 5 12.8 116.9 I 90% 4/8/14 4 Building Pad 3 12.1 117.3 I 91% Building Pad 2 12.2 1 117.6 I 1 91% 6 Building Pad 2.5 12.4 118.1 I 90% 4/9/14 7 Building Pad 2 12.1 117.9 I 90% 8 Building Pad 3 11.5 118.3 91% 9 Building Pad 2 11.6 118.5 91% 10 Building Pad PG ,. . 10.2 119.8 I 91% 4/11/14 ii Building Pad PG 10.3 119.6 I 91% 12 Building Pad 3 12.1 120.2 II 4/17/14 13 Building Pad 2.5 12.1 119.3 II 92% 14 Building Pad i 13.5 122.2 H 15 Building Pad 1 9.9 122.7 11 93% 16 Building Pad PG 10.1 123.5 11 4/25/14 17 Building pad. PG 10.2 122.2 11 92% 18 Sewer 4 9.7 119.8 11 92% 19 Sewer 2 8.9 120.5 92 7/11/14 20 Electric . 2 8.6 121.0 91 21 Building Pad* P.G 8.2 121.4 92% 9/8/14 22 Building Pad * P.G 8.5 121.5 II 92% PG= Pad Grade *retest 1920 Pacific Avenue, Unit 16060, Long Beach California, CA 90806