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Advanced BORING LOG GeoEnvironmental Inc. 837 Shaw Road, Stockton, CA 95215 BOREHOLE NO MVV-20 (209) 467-1006 FAX (209) 467-1118 TOTAL DEPTH 50 FEET Project FLAG CITY CHEVRON Drilling Co CASCADE DRILL Site Location 6421 CAPITOL AVENUE Rig/Auger Type CME-75HT/8-INCH AUGERS LODI Logged By T CUELLAR CALIFORNIA Reviewed By C LEE Project No AGE-NC-96-0232 Date(s) Drilled 30 NOVEMBER 2004 Notes Soil sampled at 5 ft intervals between 15 and 50 feet, = Water level during drilling Page 1 of 1 Boring dual-completed as monitoring well MW-19 s Water level in completed well Sample Blows PID Sod USCS Class and Well Well DepthID (per 6") (ppm) Symbol Sod Description AmpletioB Description Top Well Cap 0 5' Cement grout seal –5 05ft-6ft MW20-5 --- --- NO SAMPLE No sod sample collected Bentonite seal 6ft-8ft –10 MW20-10 --- --- NO SAMPLE No soil sample collected –15 MW20-15 22-20-20 0 ML Pale brown-dark brown,moist,hard,fine sandy #3 sand SILT,60%fines/40%sand,no odor 8 f-25 5 ft –2 0 MW20-20 24-30-32 0 1 1 1 SM Pale brown w/white ppt and black fragments, saturated,dense,silty fine SAND,80%sand/20%fines, art cemented,no odor Screen interval loft-25ft –25— MW20-25 15-24-25 1000+ SM Brown,saturated,dense,silty fine SAND,70% Bottom Well-Cap A sand/30%fines,no odor 25 ft –30— MW20-30 10-15-18 NO SAMPLE not enough sample to log Bentonite seal 255ft-43ft –35 MW20-35 I0-15-10 0 SM Dark brown,saturated,fine SAND w/silt,80% sand/20%fines,no odor –40— MW20-40 18-15-16 1000+ SP Brown,saturated,fine SAND,less than 5%fines, unconsolidated,no odor #3 sand –45 43ft-50ft MW26-45 8-6-15 36 SP Pale brown,saturated,fine SAND,less than 5% fines,unconsolidated,no odor Screen interval 45ft-50ft Bottom Well-Cap B –50— MW20-50 --- 1000+ SM Brown,moist,silty fine SAND,70%sand/30% 50 ft fines,well compacted,no odor -55