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WHF Environmental Consultants, Inc. <br /> Columnar Stratigraphic Section <br />' Backfilled with 30' of 14 ' <br /> Client: George Schuler Conductor Casin . Will be Pae 1 of 1 <br /> Borehole B-1 when deepened. <br /> Project: Remedial Tank Excavation Contractor: StMCO <br />' Location: 1705 N. Broadway, Stockton, CA Elevation: <br /> Date Started: 10.29.92 Date Completed 1x.29.92 <br />' Total Depth: 30' Water Depth: N.A. Logged By: Ross R. Grunwald Reviewed By: <br /> OL <br /> cc <br /> ti 'a Z c U <br /> � as <br /> r o- C E U <br /> ' <br /> a E E p <br /> p N U)a . U Geologic Description Remarks <br /> CL 0.5'-2.5' Clay. Dark brown,plastic. 10%Root Voids <br /> — Moist. Abundant root casts. Rare No HC odor <br /> carbonaceous fragments. <br /> ML 2.5'-7.0' Silt,clayey. Medium brown. 2-3%Root voids <br /> Slightly tNast�c. Damp. 3-4 mm root No HC odor <br /> 5 casts. On nded clay clasts. <br /> CM 7.0'9.5' Clay,silty. Medium brown. 5-10%Root voids <br /> — Dry¢brittle. Calcite-lined rat casts No HC odor <br /> j ("calichs"). <br /> —1{} CM 95-10.5' Hardpan. Clay,silty. Medium 20%Root voids <br /> _ -light brown. Dry&hand. Very vuggy No HC odor <br /> with root casts. <br /> i <br /> = I / MC 10.5'-19.0' Sift,cla Yy.� Medium to ti ht 15%Root voids <br /> brown. Dry r.brittle Vuggy,with root 105-14.5' <br /> 15 I I casts. No HC odor <br /> / <br />' — - <br /> Slight HCC odor dor <br /> CM 19.0'-20.0' Clay,siMedium brown. 10%Root voids <br /> 20 Dry&brittle. Root?asts. Mod.HC odor <br /> CM 20.0'-22.0' Clay. Medium brown. 2%Root voids <br /> — Moist&plastic. Rare calcite. Mod.HC odor <br />' — CL 22.0'-24.0' Clay. Medium brown. 10%Root voids <br /> Dry E brittle. Root casts. Mod.HC odor <br /> 25 ML 24.0'-' 26.0' Silt medium-light brown 2%Root voids.' Damp. Loose A crumbly. No HC odor <br /> CL 26.0'-26.0' Clay,light gray. Damp& 20%Root voids <br /> brittle. Gray bleaching on root casts. Mod.HC odor <br /> 10 <br /> ML 28.0'-30.0' Sift,clayey. Medium brown <br /> —30 , Damp. Micaceous. Loose&crumbly. Slight HC odor <br /> Notes: On 12-16-92, Spectrum Drilling setup on this casing and drilled to <br /> 46.5 feet. Drilling stopped because of water entering boring from <br /> broken water pipe. Hole was filled with sand and cemented at 28-30' . <br />' That drilling was numbered B-1. On 6--15-93, Osterberg & Stewart setup <br /> on B-1 and drilled to 90 feet and completed an observation well (MW-1). <br />