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SECOR Intematwnal Incorporated Logged By Date Drilled Dulling Contractor Project Name Method/Equipment Well Number WEST ARCO#4932 SPLIT SPOON CM 6111102 HAZMAT STOCKTON,CA HOLLOW STEM AUGER DMW See"Legend to Logs"for Boring Surface Groundwater Depth(ft) Total Drive Drop sampling method, Dram(in) Elev(ft) V_ 26 FIRST Depth(ft) wt(lbs) Dist(in) testingclassifications ho and laboratory 8 NA -T 28 STABILIZED 825 140 30 testing methods Well 3 Description Construction ��, p 29 SILTY SAND(SM) dark yellowish brown(10YR3/4),fine-grained sand, 1 SAND 36 ve dense wet 0 75 25 0 50 CLAYEY SILT(ML) light olive brown(2 5Y5/3),moderate plasttctty,very 2" 29 stiff,moist (0,0,65,35) 2 SLOTTED 37 SAND(SP) olive brown(2 5Y4/3),fine-to medium-grained,very dense, SCREEN 47 wet(0,100,0,0) 80 37 2 42 30 THREADED 24 CLAYEY SILT with SAND(ML) olive brown(2 5Y4/3),fine-grained 2 END CAP 29 sand moderate plasticity,hard moist 0 20 50 30 SAND 36 85- 90- 95— The 59095The 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 77BP 54932 00 0230 Date 8/15/02 PR Log Of Well 4932DMW2 GPj Approved by LOG OF BOREHOLE Figure (sheet 4 of 4)