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' 21 February 2005 <br /> AGE-NC Project No 99-0624 <br />' Page 2 of 4 <br /> 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br />' Water1 urn and dedicated <br /> samples were collected from each purged well using a Watera hydrolift pump <br />' tubing after allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume <br /> Each water sample was transferred into three 40-m1 volatile organic analysis(VOA)vials containing <br /> 0 5 ml 18%hydrochloric acid as a sample preservative After collection,the samples were properly <br />' labeled, placed In a chilled container and transported under chain of custody to Cal Tech <br /> Environmental Laboratories(CTEL),a State of California Department of Health Services-certified <br /> analytical laboratory The samples were analyzed for <br />' 0 Total petroleumhydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Methods 8015M, <br />' 0 Benzene, toluene, ethylbenzene and xylenes (BTEX) in accordance with EPA Method <br /> 8260B, and <br />' . Fuel additives di-isopropyl ether (DIPE), ethyl tertiary-butyl ether(ETBE),methyl tertiary- <br /> butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TSA), <br /> 1,2-dzchloroethane (1,2-DCA) and ethylene dibromide (EDB) in accordance with EPA <br />'* Method 8260B <br /> 23 WASTE DISPOSAL <br />' On 02 September 2004, approximately 55 gallons of non-hazardous purge water, generated during <br /> previous ground water monitoring events, were removed from the site In addition, 300 pounds of <br /> non-hazardous soil generated during the April 2004 monitoring well installation activities were <br />' removed from the site Transportation and disposal was completed by Slaby Sales of Borrego <br /> Springs, California The waste was disposed of at the Filter Recycling Services' Facility in Rialto, <br /> California Copies of the waste disposal manifests are included in Appendix C <br />' 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data The <br />' contaminant impact to ground water was quantified by the laboratory analytical data <br />' 3 1 GROUND WATER GRADIENT AND DIRECTION <br /> At the time of the November 2004 sampling event, depths to ground water ranged from 55 68 feet <br />' Advanced GcoEn"ronmcntal,Inc <br /> I <br />