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STRATIGRAPHIC AND INSTRUMENTATION LOG CN), (OVERBURDEN) Page 2 of 2 PROJEC T NAME: SHELL OIL PRODUCTS HOLE DESIGNATION: MW-16-77 PROJECT NUMBER: 240778 DATE COMPLETED: July 11,2007 CLIENT: DENIS BROWN DRILLING METHOD: ROTOSONIC LOCATION: STOCKTON,CALIFORNIA FIELD PERSONNEL: LG DEPTH STRATIGRAPHIC DESCRIPTION&REMARKS DEPTH SAMPLE ft BGS ft BGS MONITORING WELL W W j oJ m WU Q W > Z Z cr Z SM-SILTY SANDS,gleyl 5g 4/1, wet,10% silt,85%fine sand,5%coarse gravel,low 52 plasticity CL-CLAY,gleyl 5g 4/1, moist,20%clay, 53.00 54 65%silt,15%fine sand,medium plasticity 56 low plasticity 00 BENTONITE Sg 4/1,moist,15%clay,85%silt, 55. low plastiti city GROUT 58 60 ML-SILT,5g 4/1,dry to moist,15%clay,85% 60.00 silt,medium plasticity 62 2"PVC WELL 64 CASING ML-SILT,5g 4/1,dry to moist,15%clay,85% 65.00 66 silt,low plasticity 68 70 BENTONITE CHIPS 72 SM-SILTY SANDS,5g 4/1,dry to moist,15% 72.00 _ clay,85%silt,low plasticity =_ 74 - 2"PVC WELL SCREEN 76 = 5M-SANDS,10y 3/1,wet,5%silt,70%fine to 77.00 78 coarse sand,25%fine to coarse gravel,low plasticity 80 GW-SANDY GRAVEL,10y 3/1,wet,5%silt, 80.00 20%fine to coarse sand,75%fine to coarse • 82 gravel,low plasticity BENTONITE CHIPS 84 .' END OF BOREHOLE @ 85.Oft BGS 85.00 86 WELL DETAILS o Screened interval: 88 72.00 to 77.00ft BGS Length: 5ft 0 90 Diameter: tin Slot Size: 0.020 Material: PVC UO 92 Sand Pack: 71.00 to 77.00ft BGS ()-94 Material: #2/12 SAND PACK 'a cv 96 0 n 98 O J Z W j NOTES: MEASURING POINT ELEVATIONS MAY CHANGE;REFER TO CURRENT ELEVATION TABLE X WATER FOUND Y w 0