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George's Service Project Name Borehole No, MW-7 Page of 1 <br />425.2 Project No Date 4/29/97 Contractor V&W Drilling <br />Field Geo/Eng M. Niemi Drilling Method Hollow Stem Auger <br />Geological Technics Inc. <br />Area & County Corner of Durham Ferry Rd. and Hwy 33/ San Joaquin Co. <br />Borehole Dia <br />Filter Pack <br />8" Tot, Depth <br />Annular <br />22' Tot. Casing Depth 22' Casing Dia 2 " Screened Interval 22'-7' <br />22'-6' Seal 6'-4' Slot Size 0 -020" Grout 4'-0' Water Depth +/-7' <br />-5 -I-. . <br />- -6. <br />.... <br />E _z d u <br />a <br />1--- • <br />\ . <br />-• Xi 3 <br />in.:$- --• <br />-' •P 01 0) <br />- <br />c <br />c .2 <br />3 U -, 0 j <br />0 <br />V) >1 Description <br />Remarks <br />OVM (ppm) <br />_ <br />_ <br />_ <br />- <br />_ 1451 5 --- ML SILT-(2.5Y6/8), slightly plastic. <br />_ <br />- <br />- <br />--: <br />_ 6 : <br />_.=)----- <br />_--- = - 1CL , CLAY-(10YR4/3), very hard, only <br />enough sample for geology. <br />- , <br />-- <br />_ <br />7 <br />9 <br />12 <br /> =- <br />,-- - - -- =r•- "--- - • <br /> SM <br />CL <br />SILTY SAND-(2.5Y6/4), grading to clay <br />in bottom 6", hard. <br />- <br />- <br />_ <br />_. <br />----:::: =.-- <br />---- <br />___ 1506 <br />4 <br />3 <br />3 -" - - ---:::: <br />SM SILTY SAND-(2.5Y5/6), very fine to fine <br />grained, slight silt matrix. <br />_ <br />_ <br />- <br />-• <br />- <br />_ <br />_ <br />_ <br />Sample Submitted <br />Notes: ' ' SAND L--- CLAY rz.zd, Annular Seal n Grout <br />to Laboratory LE] SILT <br />5 <br />10 <br />15 <br />20 <br />25 <br />30 <br />„, <br />"""'""""'""" Borehole Log