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1 <br />' 16 May 2002 <br /> ,. <br /> AGE-NC Project No 99-0657 <br />' Page 2 of 6 <br />' Rinseate generated during drilling activities was containerized in properly labeled DOT-approved <br /> 55-gallon drums and was stored on-site in an area lacking public access The CPT soil bonngs were <br /> backfilled over their entire depth range with a portland cement grout mix <br /> 2 2 GROUND WATER SAMPLE COLLECTION <br /> Following advancement of the initial boring to collect lithologic data, a HydroPunch ground water <br /> sampling tool was attached to the hollow-stem rod assembly and utilized to collect grab ground <br />' water samples from specified depths of an immediately adjacent, twin soil boring Ground water <br /> samples were collected from the specific depths based onthe previously acquired CPT-lithology data <br /> indicating favorable conditions for sampling ground water <br /> The HydroPunch sample tool was pushed into the specific depth interval then withdrawn <br /> approximately four feet to expose an inlet screen The interior of the sampling tool filled with water <br />' and a 1-inch outer diameter(O D ) stainless steel bailer was lowered and utilized to extract a ground <br /> water sample Following sample collection, the samples were placed in laboratory-supplied <br /> containers,properly labeled and transported under chain-of-custody to McCampbell Analytical Inc <br /> • (MAI),a Call fornia Department of Health Services-certified laboratory Samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) In <br /> accordance with EPA Method 8015-Modified, <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl tertiary-butyl ether <br /> (MTBE) In accordance with EPA Method 8020, and <br /> • The fuel additives MTBE, di-isopropyl ether (DIPS), ethyl tertiary-butyl ether (ETBE), <br /> tertiary-amyl methyl ether(TAME), tertiary butanol (TBA),ethylene dibromlde(EDB) and <br /> 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260-Modified <br /> I All rinseate generated during drilling activities was containerized in properly labeled DOT-approved <br /> 55-gallon drums, and was stored on-site in an area lacking public access The twinned soil bonngs <br /> were backfilled over its entire depth with a portland cement grout mix <br /> 3.0. FINDINGS <br /> ISoil descriptions were utilized to construct the vertical and lateral soil model, the contaminant <br /> impact to ground water was quantified from the laboratory analytical data obtained from the <br /> investigation <br /> • <br /> IAdvanced CwEnvironmental,Inc <br />