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SECOR Inrernattonallnco orated Logged By Date Drilled Drilling Contractor Project Name Method/Equipment Well Number ARCO#4932 CAL MOD SPLIT SPOON CM 816103 CASCADE STOCKTON,CA HOLLOW STEM AUGER EW-5 See"Legend to Logs"for Boring Surface Groundwater Depth(ft) Total Drive Drop sampling method, Diam(in) Elev(ft) 30 FIRST Depth(ft) wt(Ibs) Dist(in) classifications and laboratory 12 NA 32 37 STATIC 410 140 30 testing methods Well Construction a o Descnption a TRAFFIC HAND4-INCH SIDEWALK CONCRETE SLAB ° RATED UGE GRAVELLY SAND-FILL WELL BOX SILTY CLAY w/SAND(CL) very dark grayish brown e GROUT (lOYR-312), fine grained sand,vertstiff,moist,moderate plasticity, (0,10,30,60) 9 O a o 5 11 0 r r 15 SANDY CLAYEY SILT(ML) light olive brown(2 5Y-5/3), fine 19 grained sand,very stiff to hard,moist,moderate plasticity, b (0,20,50,30) e 30 22 0 1005 v v 25 d d 20 o e a . v v 15 23 SILTY SAND w/CLAY(SM) dark yellow brown(I OYR-4/4), 0 1010 24 fined grained sand,dense,moist,(0,65,30,5) 27 BENTONITE SEAL #3 SAND 20 19 0 1015 6" 20 SAND wl SILT(SP) brown(1 OYR-4/3),fined grained sand, DIAMETER, dense,moist,(0,90,10,0) 0 020" STAINLESS STEEL WRAP 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 77BP 54932 03 Date 9115/03 DWR Log of Well 4932EW-3 GPJ Approved by LOG OF BOREHOLE Figure (sheet 1 of 2)