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Home My WebLink AboutCT 00-02; CALAVERA HILLS 2; COMPACTION REPORT OF GEOTECHNICAL OBSERVATION AND TESTING SERVICES; 2004-10-20C-T OQO2 Geotechnical Geologic. Environmental 5741 Palmer Way • Carlsbad, California 92008 • (760) 438-3155 • FAX (760) 931-0915 October 20, 2004 W.O. 41 09-D-SC Calavera Hills II, LLC 2727 Hoover Avenue National City, California 91950 Attention: Mr. Don Mitchell Subject: Compaction Report of Geotechnical Observation and Testing Services, Domestic Water Utility Main (#061336), Calavera Hills II, Improvements for College Boulevard, Reach B, and Cannon Road, Reach 3, Carlsbad, San Diego County, California Reference: "Improvement Plans For: College Blvd., City of Carlsbad," Project No. C.T. 00-02, Drawing No. 390, dated September 10, 2002, by O'Day Consultants. Dear Mr. Mitchell: This report presents a summary of the geotechnical engineering observation and testing services provided by GeoSoils, Inc. (GSI) during the observation and testing :f recycled water utility main trench for the subject site. This report covers only the utility trench backfill tested by GSI from January, 2004, through August, 2004. TRENCH BACKFILL Backfill operations were observed by GSI personnel on a part-time basis as solely requested and directed by the contractor/client. Select native onsite soils and import soils were used as backfill for the water and sewer trenches. The required compaction was achieved by mechanical means. The minimum compaction required was 90 percent of the laboratory standard (ASTM D-1 557). FIELD TESTING 1.. Field density tests were performed using the nuclear densometer ASTM D-2922 and ASTM D-3017 and the sand cone method ASTM D-1556. The test results are presented in the attached Table 1. Field density tests were taken at periodic intervals and random locations to check the compactive efforts provided by the contractor. Where test results indicated a less than the required minimum compaction, the contractor was notified and the area was reworked until the required minimum relative compaction was achieved for each respective area. Testing was provided on a part-time basis, as requested. Visual classification of the soil in the field was the basis for determining the maximum density value to use for a given density test. LABORATORY TESTING The laboratory maximum dry density and optimum moisture content for each of the major soil types were determined according to test method ASTM D-1 557. Corrected values for the percentage of rock in a given sample were used in the determination of relative compaction. The following table presents the results: Y r SOIL YPE.x. MAXIMUM DRY DENSITY (PCF) OPTIMUM MOISTURE CONTENT %) A - Dark Brown, SILTY SAND 120.5 13.0 B - Gray, SILTY SAND w/GRAVEL 122.0 10.0 J - Brown, SILTY SAND w/GRAVEL 134.0 8.0 N - Dark Brown SILTY SAND 136.0 8.0 Aggregate Base 137.0 7.0 REGULATORY COMPLIANCE Placement of compacted backfills, under the purview of this report, have been completed using the observation and selective testing services provided by representatives of GSI. Backfill operations were performed in general compliance with the requirements of the City of Carlsbad. Our findings were made in conformance with generally accepted professional engineering practices, and no further warranty is implied or made. GSI assumes no responsibility or liability for work, testing, or recommendations performed or provided by others. This report is subject to review by the controlling authorities for this project. Calavera Hills II, LLC W.O. 41 09-D-SC Domestic Water Utility Main, Reach B and Reach 3 October 20, 2004 File: e:\wp7\4100\4108d.cro Page 2 GeoSoils, Inc. We appreciate this opportunity to be of service. If you have any questions pertaining to this report, please contact us at (760) 438-3155. Respectfully GeoSoils, Inc. /c No. 1924 \ \ t\r EXP J J ,f -,,. Ila P. AVK Robert G. Crisman David W. Skelly .6 Engineering Geologist, C0 4 Civil Engineer, ACE 47857 . OP C RGC/DWS/JPF/jk Attachments: Table 1 - Field Density Test Results Distribution: (4) Addressee Calavera Hills II, LLC W.O. 41 09-D-SC Domestic Water Utility Main, Reach B and Reach 3 October 20, 2004 File: e:\wp7\4100\4108d.cro Page 3 GeoSoils, Inc. Table 1 FIELD DENSITY TEST RESULTS TEST NO. UTILITY TYPE DATE TEST LOCATION TRACT NO. ELEV OR DEPTH MOISTURE CONTENT DRY DENSITY REL COMP TEST METHOD SOIL TYPE ..DOMEST.!c.WATER............. 1 W 12116/03 131+00 Cannon 45.0 I 13.0 1125 93.3 ND A 2 W 12/16/03 132+50 Cannon 47.0 13.6 1109 920 ND A 3 W 12116/03 134+00 Cannon 49.0 14.4 1089 903 ND A 4 W 12/16/03 135+50 Cannon 50.0 13.8 109.2 90.6 ND A 5 W 12/16/03 137+50 Cannon 51.0 13.4 109.6 90.9 ND A 6 W 1 12/16/03 139+00 Cannon 52.0 14.6 110.0 91.2 ND A 7 W 12116/03 140+50 Cannon 54.0 14.0 109.4 90.7 ND A 8 W 12/16/03 142+00 Cannon 55.0 15.1 110.9 92.0 ND A 9 W 12/16/03 142+50 Cannon 57.0 13.8 109.0 90.4 ND A 10 W 12/16/03 145+00 Cannon 59.0 13.2 111.2 92.2 ND A 11 W 12116/03 146+50 Cannon 60.0 13.0 109.3 907 ND A 12 W 12116/03 148+00 Cannon 62.0 13.9 110.6 91.7 ND A 13 W 12116/03 149+50 Cannon 64.0 14.1 110.4 91.6 ND A 14 W 12116/03 151+00 Cannon 65.0 13.2 108.8 90.2 ND A 15 W 12124/03 130+50 Cannon 46.0 9.2 121.8 90.8 ND J 16 W 12124/03 129+50 Cannon 45.0 9.0 121.2 90.4 . ND J 17 W 12/24/03 128+50 Cannon 43.0 8.5 122.4 91.3 ND J 18 W 12/30/03 152+00 Cannon 70.0 8.2 109.0 90 ND A 19 W 12120/03 153+00 Cannon 71.0 8.9 110.2 91.4 ND A 20 W 2119/04 126+08 Cannon 36.0 8.2 121.6 90.7 ND J 21 W 2119/04 125+90 Cannon 38.0 8.4 122.9 91.7 ND J 22 W 2119/04 126+60 Cannon 37.0 8.6 122.4 91.3 ND J 23 W 3/29/04 112+40 College (Reach B) Reach B-College/Cannon 89.0 9.3 123.9 91.1 ND N 24 W 3/29/04 111+00 College (Reach B) Reach B-College/Cannon 98.0 8.2 123.2 90.6 ND N 25 W 3/29/04 109+50 College (Reach B) Reach B-College/Cannon 110.0 8.4 125.7 92.4 ND N 26 W 3/30/04 113+10 College (Reach-B) Reach B-College/Cannon 85.0 8.4 125.0 91.9 ND N 27 W 3/30/04 114+40 College (Reach-B) Reach B-College/Cannon 79.0 9.1 130.8 96.2 ND N 28 W 3/30/04 116+00 College (Reach-B) Reach B-College/Cannon 73.0 . 9.4 128.1 942 ND N 29 W 3/30/04 155+50 Cannon (Reach Ill) Reach B-College/Cannon 71.0 12.9 112.5 93.4 ND A 30 W 3/30/04 157+00 Cannon (Reach Ill) Reach B-College/Cannon 69.0 12.8 110.4 91.6 ND A 31 W 3/30/04 159+00 Cannon (Reach Ill) Reach B-College/Cannon 66.0 13.6 111.5 92.5 ND . A 32 W 4/13/04 El Camino - Cannon Inter. Cannon/El Camino -4.0 13.5. 109.0 90.4 ND A 32 W 5/19/04 113+75 Reach B-College/Cannon 82.0 10.2 110.0 90.1 ND B 33 W 4/13/04 El Camino - Cannon Inter. Cannon/El Camino -2.0 14.0 110.0 91.3 ND A 33A W 6/1/04 103+50 College -2.0 8.2 124.0 92.0 ND J 34 W 4/16104 125+60 Cannon Cannon/El Camino -4.0 13.8 109.0 90.4 ND A 34A W 6/1/04 105+50 . College -2.0 8.0 123.0 91.0 ND J 35 W 6/1/04 108+00 College -2.0 8.4 120.0 92.0 ND J 36 W 6/1/04 112+00 College -2.0 8.2 123.0 91.0 SC J 37 W 6/1/04 119+00 College -2.0 80 122.5 91.0 ND J 38 W 6/1/04 116+25 College -2.0 8.3 123.0 91.0 ND. J Test Numbers 39 through 48 Not Used - - 49 W 6/26/04 113+93 Reach B-College/Cannon 82.0 8.3 124.2 92.6 ND J 50 W 8/5/04 1 El Camino - Cannon Inter. Reach 3 -3.0 . 7.6 131.2 1 95.7 ND Base LEGEND: * Indicates Retest ND = Nuclear Densometer SC = Sand Cone Calavera Hills II, LLC W.O. 4109-D-SC Domestic Water Utility Main, Reach B and Reach 3 October 2004 File: C:\excel\tables\4100\4lc9cLtbl.xls GeoSoils, Inc. Page 1