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SECOR ' Inreniattonallncor orated Logged By Date Drilled Drilling Contractor Project Name Method/Equipment Well Number ARCO Station#4932 HSA-Split Spoon D Harp 8121100 West Hazmat 116 E Harding Way,Stockton,CA CME-75 MW-2 See"Soil Clasification Chart" Boring Surface Groundwater Depth(ft) TotalDrive Drop for Soil Classifications and Diam(m} Elev(ft) SZ 2$First Water Depth(i wt(lbs} Dist(in) Designations 10 T 28 6 Stabilized Water 41 5 140 30 Well Q z ' Construction p c Description Q Casing Elev 40 well box G ASPHALT,GRAVEL,(AB)(0 to 3 0') ' o 0 b b 0 cement o o 4"blank SILTY SAND with CLAY(SM/SC) Brown(IOYR 413),fine casing grained,poorly graded,non plastic,dense,dry,no hydrocarbon odor (40,35,25) bentonite 5 15 CLAYEY SILT(ML) Very Dark Grayish Brown(IOYR 312), low 0 MW-2 ' seal 25 plasticity,hard,dry,no hydrocarbon odor (25,45,30) @5 25 l4"slotted 10 15 SANDY SILT(ML) Dark Yellowish Brown(10YR 4/4),fine 0 MW-2 ie 0 020 casing 18 grained sand,non plastic,hard,dry,no hydrocarbon odor (35,40,25) @10 22 15 12 CLAYEY SILT(ML) Dark Yellowish Brown(1 OYR 4/4),fine 0 MW-2 15 grained sands,slight plasticity,hard,moist, minor hydrocarbon odor @15 20 (25,40,35) ' 20 11 CLAYEY SAND(SC) Olive Gray(5Y 4/2),fine grained,poorly 0 MW-2 13 graded,olive green staining,medium dense,moist,slight hydrocarbon @20 8 odor (40,20,40) The substrata descriptions above are generalized representations and based upon visual/manual classification of cuttings and/or samples obtained during drilling Predominant material types shown on the log may contain different materials and the change from ' one predominant material type to another could be different than indicated Descriptions on this log apply only at the specific location at the time of drilling and may not be representative of subsurface conditions at other locations or times Project No 077 41983 330 Date 10/19/00 Log of Well ' 4932 GPJ Figure LOG OF BOREHOLE (sheet 1 of 2)