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centrifugal pump a minimum of three well volumes prior to obtaining a sample <br /> for analysis. Conductivity, pH, temperature and turbidity were monitored <br /> during purging. Purging was continued until these parameters had <br /> stabilized, to assure that a representative sample was taken. This data <br /> is included in Appendix C. <br /> After purging, water samples were collected using a clean teflon bailer. <br /> CThe samples were transferred from the bailer to appropriate sample bottles <br /> with as little turbulence as possible. Sample containers for volatile <br /> constituents were visually inspected following filling to ensure that there <br /> were no air bubbles in the container. <br /> The sample containers were labeled with the following information: sample <br /> identification (i.e. , well number) , site location, date and time, type of <br /> analysis, and initials of person(s) collecting the sample. The samples were <br /> then placed on ice and transported to Groundwater Technology Environmental <br /> Laboratory for analysis. All samples were analyzed for total petroleum <br /> hydrocarbons as gasoline (EPA Method 8015/8020) ; benzene, toluene, <br /> ethylbenzene and xylene (EPA Method 602) ; total lead (EPA Method 7421) ; <br /> ethylene dibromide (EPA Method 504) ; 1,2-dichloroethane (EPA Method <br /> 601/8010) ; and polynuclear aromatic hydrocarbons (EPA Method 610) within the <br /> allowable holding times. <br /> A Chain-of-Custody form accompanied the water samples to serve as a record <br /> of sample possession from the time of collection to the time of arrival at <br /> the analytical laboratory. The sample number, site identification, date <br /> sampled, analyses requested, and sample condition upon receipt at the <br /> laboratory were also recorded on the Chain-of-Custody form. <br /> Chain-of-Custody forms used during this investigation are included in <br /> Appendix C. <br /> 3286a/BAV100 18 <br />