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AUSTO ENGINEERING GROUP LOG OF BORING SB-7 Page 1 of , <br /> /-` LAFAYET, CALIFORNIA <br /> ALISTO PROJECT NO: 10-211-15 DATE DRILLED: 06-27-02 <br /> CLIENT. PG&E BOREHOLE DIAMETER: 4" <br /> SEE SITE PLAN LOCATION:McDonald Island Gas Storage Facility BOREHOLE DEPTH: 14' <br /> FOR BORING LOCATION DRILLING METHOD: Hand auger CASING DIAMETER: 3/4" <br /> DRILLING COMPANY: Alisto Engineering CASING MATERIAL: PVC <br /> LOGGED BY: B. Nagle APROVED BY. Al Sevilla <br /> Z <br /> -9 WELL DMOM S 52 GEOLOGIC DESCRFnON <br /> 1z <br /> Imported gravel surface to 6" <br /> a, 1 SM Silty SAND, damp, brown. <br /> c� <br /> U 2 <br /> Y <br /> c <br /> 16.2 m 3- <br /> 4 4 <br /> 5- <br /> 22.1 = 6— Color change to tan ® 5' <br /> 7- <br /> 8- <br /> 10.9 <br /> 810.9 - 0 9 <br /> o , Color change to gray ® 10' <br /> 0 10 Moist to wet at 10 <br /> — 11 <br /> 12- <br /> 13— Dark brown ® 13' <br /> 14 - - - - - - - - - - - - - - - - - - - <br /> Boring terminated at 14'. PVC casing removed before grouting <br /> 15 with neat cement <br /> 16- <br /> 17- <br /> 18- <br /> 19- <br /> 20- <br /> g <br />