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' 03 April 2002 AGE-NC Project No. 97-0333 ' Page 7 of 12 • One 2-inch diameter multi-level ground water monitoring well (MW-11) located approximately 80 to 100 feet north-northeast of MW-3 and screen intervals at depths between 1515 andfeet bsg(A), 50 and 55 feet bsg(B), 70 and 75 feet bsg(C), 95 and 100 feet bsg(D), 130 and 135 feet bsg(E) and 170 to 175 feet bsg(F); • One 2-inch diameter multi-level ground water monitoring well (MW-12) located ' approximately 90 to 110 feet northeast of MW-4 and screen intervals at depths between L and 25 feet bsg(A),50 and 55 feet bsg(B), 70 and 75 feet bsg(C), 95 and 100 feet bsg(D), 130 and 135 feet bsg(E) and 170 to 175 feet bsg (F); and • One 2-inch diameter multi-level ground water monitoring well (MW-13) located approximately 50 to 70 feet south-southwest ofMW-1 and screen intervals at depths between 15 and 25 feet bsg (A), 50 and 55 feet bsg (B), 70 and 75 feet bsg (C), 95 and 100 feet bsg (D), 130 and 135 feet bsg(E) and 170 to 175 feet bsg(F); ' The pilot borings will be advanced to approximately 175 feet bsg utilizing a B-95 truck-mounted drill rig equipped with 8-inch diameter hollow-stem augers;however, total depths of borings may vary according to field conditions encountered during drilling. Soil samples will be collected from MW-7,MW-9 and MW-11 at five-foot intervals,beginning at a depth of 15 feet bsg. Soil samples will be continuously collected from MW-8, MW-10, MW-12 ' and MW-13 utilizing a five-foot macro core sampler and will be described and recorded on boring logs. The macro core sampler will be driven by dropping a 140-pound weight from a height of 30 inches. Selected soil samples will be submitted to a State of California Department of Health ' Services (DHS)-certified laboratory for analysis for the following constituents: ' • TPH-g by EPA Methods 5030/8015M; • BTEX and MTBE by EPA Method 8020; • Methanol, ethanol, ethylene dibromide (EDB), 1,2-dichloroethane (1,2-DCA), tertiary butanol (TBA), di-isopropyl ether(RIPE), ethyl tert butyl ether(ETBE), tetrachloroethene (PCE),trichloroethene(TCE), TAME and MTBE by EPA Method 8260 Modified. Laboratory reports for soil analysis, testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be presented in a report with ' findings and recommendations. Advanced GeoEnvironmental,Inc.