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Wright Environmental Servic4.., Inc. Tracy, CA Exp, . atory Boring Log pg 2 of 4 <br /> Project No. 4062R Boring/Well No. MW-1 Well Installed: 2" dia. Sch 40 PVC <br /> Client:Unden School District Date Drilled: July 27, 1995 Total Depth: 119.5'; Casing Depth: 118' <br /> Location: 7007 Pezzi Rd, Stockton, CA Logger. CMP Screen Length and Size: 20' of 0.020" <br /> Drilling Method: 8" OD Holiowstem Driller: Spectrum Top of Sand Pack: 96'; Sand Size: 2/12 <br /> Permit: PHS/EHD #005750 Top Bentonite: 93'; Cement Grout Seal: 93' to V <br /> Water Levels: 1st Enc: 105' Static: 104.35 Surface vault box <br /> 08:21 am 7/28/95 <br /> Sample Blow Depth Borehole <br /> No. OV Count (ft} Lithology Log Completion <br /> 40 <br /> Mw-1-8 3 43 ML - Sandy SILT yellowish red 10YR4/6, fine sand 30%, <br /> silt 70%, clay up to 5%, open unlined burrows or root holes ". <br /> 1%, caliche, very stiff, damp. .�.A <br /> A"w <br /> 45 <br /> w"w" w"wAw <br /> MW-1-9 3 43 SM - Silty SAND, varigated, fine-med sand to 90%, silt 10%, <br /> locally laminated to 0.5 inch thick silt strata, dense, damp. <br /> AwA"w <br /> 50 <br /> Mw-1-10 3 4$ SP to SM - SAND to Silty SAND dark grayish brown 2.5YR4/2, <br /> fine sand to 100%, silt variable to 10%, massive, dense damp. <br /> w" <br /> 55 <br /> Mw-1-11 3 51 ML - CL - Clayey SILT to Silty CLAY dark grayish brown 2.5YR <br /> 4/2, 50/50 silt clay, rare sand and fine gravel float in matrix, <br /> hard, damp; 1-foot thick sand bed at 50 feet. <br /> w""" <br /> 60 <br /> Mw-1-12 ND 42 same as above, caliche throughout, very stiff, damp. <br /> A"wA <br /> A"w <br /> "A <br /> 65 <br /> Mw-1-1 z ND 49 <br /> SP - SAND, grayish brown 2.5YR5/2, poorly graded, fines<3%, <br /> clean quartz sand, dense, damp. <br /> 70 w"A <br /> Mw-,-12 ND 7$ 1 same as above, fine to medium grained, biotite and meta-lithics %%. <br /> <10%, quartz 90%+, very dense, damp. <br /> wAwAw <br /> wAA <br /> Mw-1-12 ND 50 75 <br /> for same as above, fines <1%, very dense, damp. <br /> w� <br /> 5.5' <br /> A"A <br /> w"AA <br /> w"""A <br /> 80 <br />