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4 ? <br /> Advanced BORING LOG <br /> R-- GeoEnvironmental, Inc. 2 <br /> -- BOREHOLE NO.: MW <br /> 837 Shaw Road, Stockton, CA 95215 <br /> (209)467-1006 FAX: (209)467-1118 TOTAL DEPTH: 70 feet <br /> Project: ARROYO SMOG Dafe(s) Drilled: 21 JULY 2005 <br /> Project No.: AGE-NC-04-1168 Page 2 oft <br /> Depth Sample Blows PID Soil USCS Class and Well Well <br /> ID (per 6") (ppm) Symbol Soil Description Completion Description <br /> —45 <br /> MI. Olive-Brown,dry,CLAYEY SILT with SAND; <br /> MW2-45 30/31!31 12 well-graded(<10%),slight plasticity,slight toughness, <br /> slight consistency,slight HC.odor. Bentonite seal from 45.'to <br /> 49' bsg. <br /> —50 N4U Olive-Brown;dry,SANDY SILT;well-graded(10- <br /> MW2 50 28/30(30 1.7 25%),slight plasticity,slight toughness,slight <br /> consistency,slight HC odor: <br /> —55 ML:Olive-Brown,damp,SANDY SILT;well-graded <br /> (10-25%),slight plasticity,slight toughness,slight #3/12 sand from 48'to <br /> MV2-55 32!34/30 12 consistency,slight HC odor. 70'bsg• <br /> —60 ML:Olive-Brown/Gray,damp,SANDY SILT with <br /> CLAY;well-graded(<100/o),medium plasticity,medium Screened interval from <br /> MW2-60 2123/19 0 toughness,slight consistency,slight HC odor. 50'to 70'bsg. <br /> —65 MH:Olive-Brown with Gray streaks,saturated,SANDY <br /> MW2-65 2022/19 0 SILT;well-graded(10-25%),no HC odor. <br /> —70 SM:Green-Gray,saturated,SILTY SAND;well-graded Cap at 70'. <br /> MW2-70 1922/18 0 (10-250/6),NO HC odor. <br /> Y <br />