Laserfiche WebLink
' 15 January 2005 Y <br /> II AGE-NC Project No 96-0235 <br />' Page 2 of 5 <br /> 1 <br /> s <br /> After recording water level measurements, wells MW-1,MW-2, MW-3,MW-6 (A and B), MW-7, <br />' MW-8 (A and B), MW-9, MW-10, MW-11 (A and B) through MW-15 (A and B) and EW-2 were <br /> purged of standing water utilizing a Waterra inertial pump or a dedicated disposable plastic bailer, <br /> between.4 25 and 56 gallons of water were removed from each of the wells For the intermediate and <br /> deep wells,ground water was purged from near the top of the water column to remove water trapped <br /> within the non-screened interval of the well casings Ground water temperature,pH and conductivity <br /> were measured at regular purge-volume intervals using an Oakton water analyzer Field sheets and <br /> data are included in Appendix B Purged water was stored on-site in labeled, 55-gallon Department <br /> of Transportation (DOT)-approved drums <br /> 2 1 2 Collection and Analysis of Ground Water Samples <br /> Water samples were collected from each purged well utilizing the discharge tube of the Waterra <br /> inertial pump or a new, dedicated disposable plastic bailer after allowing the wells to achieve a <br /> minimum 80%recovery of the pre-purge water volume Each water sample was transferred into 40- <br /> ml volatile organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid as a sample <br /> preservative and into 1-liter amber bottles without preservative `After collection, the samples were <br /> • properly 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 (DHS)- <br /> certified analytical laboratory, and were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and as diesel (TPH-d) in <br /> accordance with EPA Method 8015M, <br /> • Benzene,toluene,ethylbenzene and total xylenes(BTEX)and the fuel additives di-isopropyl <br /> ether(DIPE),ethyl tertiary-butyl ether(ETBE),methyl,tertiary-butyl ether(MTBE),tertiary- <br /> amyl methyl ethef(TAME), tertiary-butyl alcohol (TBA), 1,2-dibromoethane (EDB) and <br /> 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260B <br /> r 1 <br /> { <br /> 3.0. FINDINGS <br /> The hydrocarbon-impact to'ground water was quantified byllaboratory analysis of the ground water <br /> samples Ground water elevation and gradient was determined by utilizing data collected from the <br /> field , <br /> i <br /> r I <br /> t Advanced CeoEnvlronmental Inc <br /> 1 ' <br /> r II <br /> i <br />