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mBel - <br /> TER AND FREE-FLOATING PROD U . DEPTH UETERA4iNATCON <br /> 1.0 GROUND WA <br /> determine the free Product thickness,if press nt, <br /> A water/Petroleum product interface probe was used to <br /> round water depth in monitoring wells that do not <br /> and a water level indicator was used to measure the g <br /> contain free product. Depth to ground water was measured from the top of each monitoring well <br /> casing. The tip of the water level indicator was subjectively analyzed for product sheen. All <br /> measurements and physical observations were then recorded in the field on separate data sheets <br /> presented in Enclosure 13. <br /> 2.0 SUB CTCVE ANALYSTOF GROUND tiYATER <br /> Prior to purging, a water sample was collected from the monitoring well for subjective analysis. The <br /> sample was retrieved by gently lowering a clean,disposable bailer to approximately one-half the bailer <br /> length past the airiliquid interface. The bailer was then retrieved,and esample co sheen.ntained within the <br /> bailer was examined for floating Product and the appearance of a petroleumP <br /> MON <br /> 3.0 ITORING WELL DEVELOPMENT PURGING AND SAMPLING <br /> ed of three to four well volumes of water using a centrifugal purnp or bailer. <br /> Monitoring wells were purgedwere <br /> Ground water removed from the wells was stored in SS-gallon barrels at the site. Thu barrelsround <br /> labeled with corresponding monitoring well numbers and the date of Purging. After p gt g, g <br /> water levels were allowed to stabilize. Aground water sample was thea removed from each of the <br /> wells using a disposable bailer. If the well was purged dry,it was allowed to sufficiently recharge and <br /> llected. Samples were collected in air-fight vials, appropriately labeled;and stored on <br /> a sample was co <br /> ratory• �rn <br /> ice from the time of collection through the time of delivery to the labo �the laboratory <br /> ratory <br /> was completed to ensure sample integrity. Ground water samples were transported <br /> and analyzed within the EPA-specified holdinZ times for the requested analyses. Purge water will be <br /> collected from the storage barrels in a vacuum truck and transported to an appropriate facility for <br /> treatment and/or disposal. <br />