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_ 5 <br />' 20 September 2001 <br /> AGE-NC Project No 96-0235 <br /> Page 2 of 8 <br /> Adnumstratlon, U S Coast Guard and U S Environmental Protection Agency, 1985) Prior to <br />' mobilization, each soil probe location will be clearly marked and a utility clearance obtained through <br /> } Underground Service Alert <br /> 2 2 CPT ADVANCEMENT AND GROUND WATER SAMPLE COLLECTION <br /> 1 ' f CPT soil borings at the site to characterize llthology, potential <br /> AGE proposes to advance our g <br /> contaminant migration pathways and to assess the vertical extent ofpetroleum hydrocarbon-linpacted <br />' ground water Proposed CPT soil boring locations are illustrated In Figure 2 <br /> Based on petroleum hydrocarbon-impacted media encountered during previous investigations,AGE <br /> proposes CPT soil borings in the following locations <br /> Approximately 5 feet east of extraction well EW-1,located near the former UST cluster area, <br /> Approximately 30 feet southeast of AS-1, located near the former UST No 3 area, <br /> ao Approximately 90 feet south of monitoring well MW-5, located near the former UST No 3 <br /> ' area, and <br /> a Approximately 70 feet south-southeast of AS-1, located near the former UST No 3 area <br /> 1 <br /> The CPT borings shall be advanced to approximately 100 feet bsg utilizing a 25-ton truck-mounted <br /> CPT ng equipped with 2-inch diameter hollow-stem rods,however,total depths of borings-may vary <br /> 1 according to hydrogeologic conditions encountered durmg drilling activities <br /> Grab ground water samples will be collected in intervals of saturated, porous and permeable <br /> i matenal Selected'ground water samples will be analyzed by a State of California Department of <br /> Heaith Services {DHS)-certified laboratory <br /> } <br /> Ground water samples collected from the former UST cluster will be analyzed for r <br /> ' * TPH-g In accordance with EPA Method 8015 Modified, <br /> • BTEX and methyl tertiary butyl ether(MTBE) in accordance with EPA Method 8020, <br /> • Fuel oxygenated compounds including MTBE, tertiary butanol(TBA),,tertiary-amyl methyl <br /> ether TAME, &-isopropyl ether (DIPS), and ethyl tertiary-butyl ether (ETBE) by EPA <br /> ' Method 8260 Modified, and <br /> • Ethanol, methanol, ethyldibrolnide (EDB) and 1,2-Dichloroethane (1,2-DCA) by EPA <br /> Method 8260 Modified <br /> 1 Advanced GeoEnvironmental,Inc <br /> 1 i r <br />