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e <br /> Wright Environmental Services, Inc., Tracy, CA Exploratory Boring Log <br />. Project No 4111 Boring/Well No MW-1 Well Installed 2" dia Sch 40 PVC <br /> Client Haley Flying Services Date Drilled May 24, 1997 Total Depth 21 5' Casing Depth 20' <br /> Location Pescadero at Paradise, Tracy, CA logger CMP Screen Length and Size 10' of 0 020" <br /> Drilling Method 8" OD Hollowstem Auger Top of Sand Pack 8' Sand Size 2112 <br /> Permit PHS-EHD #012546 Top Bentonite 6' Cement Groot Seal 6' to V <br /> Water Levels 1st Enc 12 5': @10 07 am Surface vault box, Casing Elev 22 39' MSL <br /> Static 8 5' 01 10 pm <br /> N <br /> Sample Blow a Depth Borehole <br /> No OV Count � (ft) Lithology Log Completion <br /> CO <br /> Concrete and Subbase <br /> CL - Silty CLAY, dark grayish brown 10YR4/2, moderate <br /> plasticity, 30% fine sand dissem in clay matrix, minor caliche, <br /> soft, damp <br /> 5 <br /> Mw i t - 4 Same as above, soft, damp <br /> 10 <br /> MW12 _ 22 1Same as above, sand 25%, very faint bedding, very stiff, damp <br />. SC - Clayey SAND, yellowish brown 10YR516, fine sand 80-85% <br /> 15 silt-clay up to 15%, faint bedding, medium dense, saturated, <br /> Mw_1 _ 20 water enters borehole slowly <br /> Same as above, 2" thick interbeds of medium sand in clay, sand <br /> 20 saturated, clay moist <br /> Mw 1 - 27 CL - Sandy CLAY, brown 7 5YR4/2, low plasticity, sand to 45%, <br /> minor caliche, contains 1' thick sand interbeds very moist to <br /> aturated, clay low plasticity, very stiff, damp to moist <br /> Bottom of Boring = 21 5 feet <br /> Reviewed by RG/CEG <br />