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Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No. 1117 Boring/Well No. B-4 <br /> Client: SJRR Comm. Date Drilled: October 9, 1997 <br /> Location: Weber Station, Stockton, CA Logger: CMP Well Installed: No <br /> Parcel 5 - Former Battery Storage Location Total Depth: 21.5' <br /> Drilling Method: 8" OD Hollowstem Cement Grout Seal: 21.5' to surface <br /> Permit: CSJ PHS-EHD # 013916, 013915 <br /> Water Levels: 1st Enc: None Static: -- <br /> CD <br /> Sample Blow a. Depth Borehole <br /> No. Han Count 8 (ft) Lithology Log <br /> rn Completion <br /> Gravel Surface with Fill, contains brick, glass, metal and clay. <br /> ML - Sandy SILT, reddish brown 5YR5/4, sand<20%, massive, <br /> 5 locally contains rootholes or burrows, caliche, firm, damp; <br /> B-4 C _ push soil pH = 6. <br /> 5' <br /> Color change to brown 7.5YR5/4. <br /> •Ate• <br /> 10 <br /> $-4 _ 40 Same as above, fine sand dissem 20-30% and floats in silt, <br /> 10, nonplastic, hard, damp; pH w 6 <br /> 15 <br /> B-4 �..h.. <br /> 15' — 35 ML - Sandy SILT, light grayish brown 10YR6/2, fine sand 30%, <br /> 9 <br /> occurs as thin interbeds, caliche, burrows, hard, damp; pH = 6. <br /> B-4 20 SM - Silty SAND, fight gray brown 10YR6/2, sand 75%, silt to <br /> 20' 0 24 25%, locally sand 100%, massive to crudely bedded, burrows, <br /> medium dense, damp. <br /> Bottom of Boring = 21.5 feet <br /> Note: Han. refers to the Modified Hanby Field Analytical <br /> Laboratory test which yields a field colormetric qualitative <br /> mesasurement of presence of petroleum hydrocarbons in <br /> parts per million. <br /> PH - Field pH measurement paper readings in soil paste. <br /> Reviewed by RG/CEG <br />