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' J f <br />' 19 February 2002 <br /> AGE-NC Project No 95-0109 <br /> Page 2 of 6 <br /> Gillespie, D and Greig, J , 1986) to generate a general hthology type and display on a CPT boring <br />' log (See Appendix A) Rinseate generated during drilling activities was containerized in properly <br /> labeled Department of Transportation (DOT)-approved 55-gallon drums and was stored on-site in <br /> - an area lacking public access The soil bonngs were backfilled over their entire depth range with a ' <br /> portland cement grout mix <br /> 2 2 GROUND WATER SAMPLE COLLECTION <br /> Following advancement of the initial bonngs to collect lithologic data, the CPT drill ng equipped <br /> with a HydroPunch ground water sampling tool was utilized to collect grab ground water samples <br /> from specified depths of the twin soil bonngs The HydroPunch sample tool was pushed Into the <br />' specified zone, then withdrawn approximately three to four feet to expose an Inlet screen The , <br /> Interior of the sampling tool filled with water and a 1-inch outer diameter(O D )stainless steel bailer <br /> was lowered and utilized to extract a ground water sample Ground water samples were collected <br />' from selected depth Intervals based on previously acquired CPT-lithology data indicating favorable <br /> conditions for sampling ground water All nnseate generated during drilling activities was <br />' containerized in properly labeled DOT-approved 55-gallon drums,and was stored on-site in an area <br /> lacking public access The twinned soil borings were backfilled over their entire depth with a <br /> portland cement grout mix <br />' Following sample collection, the samples were placed in laboratory-supplied containers and <br /> transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL), a California <br />' Department of Health Services (DHS)-certified laboratory Samples were analyzed for <br /> • Total petroleum hydrocarbons,quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015-Modified, <br /> • Berizene, toluene, ethylbenzene and total xylenes (BTEX), fuel additives - methyl <br /> tertiary-butyl ether (MTBE), di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), ethylene dibromide (EDB), <br /> 1,2-dichloroethane(1,2-DCA)and other volatile organic compounds in accordance with EPA - <br /> Method 8260B <br /> I3.0. FINDINGS ' <br /> Soil descriptions were utilized to construct the vertical and lateral soil model, the contaminant <br /> impact to ground water was quantified by 'the laboratory analytical data obtained from the <br /> investigation <br /> t <br /> Advanced Ceolrnvironmental,Inc <br />