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Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br /> Project No 4090 Boring/Well No PB-10 Weil Installed No <br /> t0entt Cox & Cox Date Drilled April 25, 2000 Total Depth 20' <br /> cion 595 E 11th St , Tracy, CA Logger CMP Cement Grout Seal 20' to Surface <br /> Drilling Method 3' OD Direct Push <br /> Permit. PHS EHD SR 0121996, dated 1-10-2000 <br /> Water Levels 1st Eno 14' Static 9 15 ' <br /> 0 Borehole <br /> S�omplePID Push Depth(ft) Lithology Log Completion <br /> A <br /> Road Base A;wA <br /> A w <br /> CL - Silty CLAY, very dark grayish brown 10YR3/2, low <br /> nand plasticity, v f sand <5%, stiff, damp w w <br /> sugared A.A, <br /> Pe-10 0 s+eet Same as above, color change to dark yellowish brown 10YR3/4, A.A. <br /> stiff, damp <br /> •A+ <br /> A+A <br /> A• <br /> L A <br /> wJ <br /> Driller calls hard at 10 feet w;w; <br /> 10 <br /> CL - Sandy CLAY, dark gray 10YR4/1, low plasticity, v f <br /> Pet 0 0 Push sand 25% dissem in clay, firm, damp to moist w,A, <br /> waw <br /> Rods wet at 14 feet <br /> 1 AAw <br /> P9-10 0 Push SP - SAND, gray 10YR5/1, f med sand 99%, rare crs sand, <br /> 3 massive, dense, saturated, borehole flows to 12 feet, clear <br /> rods and push to 20 feet to attempt sample <br /> A• <br /> Driller calls hard at 20 feet, unable to advance sampler, A+w; <br /> borehole flows and collapses, readvance rods to tremae cement IA " <br /> 20 <br /> Bottom of Boring = 20 feet <br /> Sampler direct pushed <br /> unless stated otherwise <br /> NR- No PID Reading <br /> Reviewed by RG/CEG <br />