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Y Y SECOR ' Irrtentarzona!Incorporated Logged By Date Drilled Drilling Contractor Project Name Method/Equipment Well Number ARCO Station#4932 HSA-Split Spoon ' D Harp 8/21/00 West Hazmat 16 E Harding Way,Stockton,CA CME-75 MW-1 See"Soil Clasification Chart" Bormg Surface Groundwater Depth(ft) Total Drive Drop for Soil Classifications and Diam(in) Elev(ft) 1 28 5 First Water Depth(ft) wt(lbs) Dist(m) Designations 10 26 95 Stabilzed Water 415 140 30 Well Q.. y 3 Description a Construction P ¢ a Casing Elev 40 Eli well box o ASPHALT,GRAVEL,(AB)(0 to 3 0) o O d d 0 cement o ' o 0 4"blank Not enough recovery to log or take a PID reading • casing bentonite 5 25 SILTY SAND(SM) Brown(7 5YR 4/3),fine grained,poorly 0 MW-1 seal 25 graded,non plastic,dense,dry,no hydrocarbon odor (50,35,15) @5 30 4"slotted I0 22 SILTY SAND(SM) Brown(7 5YR 4/4),very fine grained,poorly 0 MW-1 lls 0 020 casing 27 graded,non plastic,dense,slightly moist,no hydrocarbon odor @10 30 (40,35,25) ' 15 10 SILTY SAND(SM) Strong Brown(7 5YR 416),very fine grained, 0 MW-1 15 poorly graded,non plastic,dense,slightly moist,no hydrocarbon odor @15 22 (50,30,20) ' 20-- - 15 CLAYEY SAND(SC) Dark Grayish Brown(2 5Y 412),fine to 0 MW-1 20 medium grained, moderately graded,low plasticity,dense,moist,minor @20 25 hydrocarbon odor (50, 15,35) 1 ' 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 rf Project No 077 41983 330 Date 10/19/00 Log of Well 4932 GPJ Figure LOG OF BOREHOLE (sheet 1 of 2)