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Home My WebLink About6607; CAMEO ROAD & EL CAMINO REAL STORM DRAIN & PIPELINE REPLACEMENT; COMPACTION TEST RESULTS; 2008-06-27June 27, 2008 Project No. 106328002 Ms. Sherri Howard City of Carlsbad 1635 Faraday Avenue Carlsbad, California 92008 ' Subject: Summary of Compaction Test Results Cameo Road Water Main ¼ Carlsbad, California - - Dear Ms. Howard: RECEIVED JUL 012008 ENGI NEERING DEPARTMENT In accordance with your request, Ninyo & Moore has provided geotechnical testing services dur- ing construction of the Cameo Road Water Main project located in Carlsbad, California. Construction generally occurred between April 11, 2008 and April 21, 2008. Our services con- sisted of on-call testing during the placement of water main backfill. This letter summarizes our servic6 and presents the results of our field and laboratory testing. Laboratory testing was performed on representative samples of material used for water main backfill to evaluate modified Proctor density and optimum moisture content. Labora- tory testing of the samples was conducted in general accordance with American Society for Testing and Materials (ASTM) D 1557 and the results a1e presented in Table 1, Modified Proctor Density Test Results. Field density testing of the water main backfill was performed in general accordance with the ASTM D 6938 (Nuclear Method). The specified relative compaction for the water main back- fill was 90 percent of the modified Proctor density. During the earthwork operations, when a field density test was performed that resulted in less than the specified relative compaction, the area was generally reworked and a retest was performed. The results of the field density tests are presented in Table 2, Summary of Field Density Tests. The approximate locations of the field density tests are shown on Figure 1, Field Density Test Location Map. The field density 5710 Ruffin Road • San Diego, California 92123 • Phone (858) 576-1000 • Fax (858) 576-9600 San Diego • Irvine • Ontario • Los Angeles Oakland • Las Vegas Carson City Phoenix • Denver Cameo Road Water Main June 27, 2008 Carlsbad, California Project No. 106328002 tests performed during the placement of water main backfill indicated the specified relative compaction after testing the reworked areas. The geotechnical services outlined in this report have been conducted in accordance with current practice and the standard of care exercised by geotechnical consultants performing similar tasks in this area. No warranty, expressed or implied, is made regarding the observations and conclu- sions expressed in this report. The reported test results represent the relative compaction and moisture content at the locations tested. It is important to note that the precision of field density tests and the maximum dry density test is not exact and variations should be expected. The re- ported locations and elevations of the density tests are estimated based on correlations with the site plans. Further accuracy is not implied. Respectfully submitted, NINYO & MOORE Francis 0. Moreland, C.E.G. Mark Cuthbert, P.E. Senior Geologist Principal Engineer FOM/MC/gg Attachments: Table I - Modified Proctor Density Test Results Table 2 - Summary of Field Density Tests Figure 1 - Field Density Test Location Map Distribution: (3) Addressee 'FRANCIS 0. ""RawN02071 4 cEirnRED ENGINEERING GEOLOGIST N0.40624 PIV 06328002 L Water Man.doc 2 iin1qo&Iuore Cameo Road Water Main June 27, 2008 Carlsbad, California Project No. 106328002 Table 1 - Modified Proctor Density Test Results Soil Laboratory Optimum Type No. Description Dry Density Moisture Content (PC') (%) Yellowish tan silty SAND 125.0 10.5 2 Reddish brown silty SAND 130.5 7.5 3 Brown silty SAND 126.5 J 9.5 106328002 L Water Main.doc I of I F4Inf/c&/fturira PO4'744!0 &)11T' SUMMARY OF FIELD DENSITY TESTS TABLE 2 PROJECT NO. 106328002 TEST OF:WATER TRENCH BACKFILL Test No. Date Test of Test Location Elevation (ft) Soil Type No. Field Laboratory Relative Compaction (°"°) Specified Relative Compaction (%) Remarks Moisture Content (%) Dry Density (pci) Proctor Density (pci) Optimum Moisture Content I # 4/11/08 WM Station 01+50 302.0 3 13.3 1 114.8 126.5 9.5 91 90 2 # 4/11/08 WM Station 01+50 303.0 3 12.6 113.9 126.5 9.5 90 90 3 # 4/11/08 WM Station 01+75 302.0 3 14.5 111.1 126.5 9.5 88 90 Retest on 4 4 # 4/1 1/08 WM Station 01+75 302.0 3 13.2 115.0 126.5 9.5 91 90 5 # 4/11/08 WM Station 02+00 302.0 3 15.0 113.5 126.5 9.5 90 90 6 # 4/14/08 WM Station 02+25 301.0 3 10.9 113.7 126.5 9.5 90 90 7# 4/14/08 WM Station 02+15 302.0 3 10.5 115.0 126.5 9.5 91 90 8 4/14/08 WM Station 02+40 301.5 3 8.7 114.1 126.5 9.5 90 90 9 # 4/14/08 WM Station 02+70 300.0 3 9.8 115.9 126.5 9.5 92 90 10 # 4/15/08 WM Station 02+60 301.0 3 8.1 109.2 126.5 9.5 86 90 Retest on 11 11 # 4/15/08 WM Station 02+60 301.0 3 11.4 114.3 126.5 9.5 90 90 12 # 4/17/08 WM Station 03+50 274.0 3 9.5 117.6 126.5 9.5 93 90 13 # 4/17/08 WM Station 03+10 291.0 1 9.1 113.8 125.0 10.5 91 90 14 # 4/17/08 WM Station 03+80 270.0 1 9.8 113.6 125.0 10.5 91 90 15 # 4/17/08 WM Station 03+30 280.0 3 9.0 114.4 126.5 9.5 90 90 16 # 4/21/08 WM Station 04+75 250.0 3 9.0 120.5 126.5 9.5 95 90 17 # 4/21/08 WM Station 04+25 26305.0 3 8.3 115.7 126.5 9.5 91 90 18 # 4/21/08 WM I Station 05+10 247.0 1 1 1 11.5 114.5 1 125.0 1 10.5 1 92 90 Notes: Test No.: (#) - Nuclear Gauge Test Method; (*) Sand Cone Test Method; (+) - 12-inch Sand Cone Method; (A) - Drive-Cylinder Method Test of: WL - Water Lateral Trench Backfill; WM -Water Main Trench Backfill; WR -Reclaimed Water Trench Backfill 06328002 EDT Water Main.xls I of I AR I D LEGEND I • W-18 APPROXIMATE LOCATION OF L WATER BACKFILL FIELD DENSITY TEST NOTE: ALL DIMENSIONS. DIRECTIONS AND LOCATIONS ARE APPROXIMATE. APPROXIMATE SCALE 0 50 100 FEET SOURCE: CITY OF i;: ;' rA (c' ' -o \ I •- I i-i V11 7YO 4i..'0 Project Name - Project Number Calculated By - Checked By - Scale Date 6-11 7/ Date Sheet of