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Wright'Environmental Services, Inc., Tracy, CA Exploratory Boring tog <br /> Project No 4111 Boring/Well No MW-2 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 S" OD Hollowstem Auger Top of Sand Pack 8' Sand Size 2112 <br /> Permit PHS-EHD #012546 Top Bentonite 6' Cement Grout Seal 6' to 1' <br /> Water Levels 1st Enc 12 5' 0 8 45 am Surface vault box, Casing Elev 22 02 MSL <br /> Static 79' @ 1`11 pm <br /> Sample Blow a Depth Borehole <br /> No OV Count as (ft) Lithology Log Completion <br /> Gravel Fill <br /> CL - Silty CLAY, dark yellowish brown 10YR4/6, low-moderate <br /> plasticity, fine-med sand 30% dissem in clay, firm, damp <br /> 5 <br /> Mw z r _ grab Same as above, drills firm to stiff, damp <br /> 10 <br /> Mw 2 _ 13 CL - Sandy CLAY, dark grayish brown 10YR4/3, moderate <br /> plasticity, 40% fine sand dissem in clay, 10% silt-clay, massive <br /> stiff, very moist to saturated <br /> • 15 <br /> MW24 _ 17 SM - Silty SAND, dark grayish brown 10YR4/2, fine sand 80%, <br /> silt-clay 20%, slightly plastic, medium dense, saturated <br /> 20 Same as above, more clay at 20 feet <br /> Mw 2 - 17 <br /> CL - Silty CLAY, brown 10YR 413, 25% fine sand disem in clay, <br /> massive, minor caliche, stiff, damp <br /> Bottom of Boring = 21 5 feet <br /> Reviewed by RG/CEG <br />