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R <br /> U <br /> Scams ROM <br /> M <br /> FIELD PRQCfDOM <br /> The following section describes field procedures that were compleud by Delta personnel in the performance <br /> of the tasks involved with this project. <br /> 1-0 QUART R Wn VV'L <br /> 1.1 Ground Water and flee-Flmli,11! prag Ct_Depth Dtlerr-nination <br /> A water,petroleum Product interface probe was used to determine free product thickness and ground water <br /> depth in each well. If a free-floating product layer was not detected by the interface probe, the tip of the <br /> probe was subjectively analyzed for product sheen, <br /> 1.2 SubjectiveAaallnia�r �nwa� <br /> Prior to purging of ground water monitoring wells,a water sample was collected from each monitoring well <br /> for subjective analysis. The retrieving of the sample involved gently lowering a clean, disposable Teflon <br /> bailer to approximately one-half the bailer lengdh past the air/liquid interfar-e. The bailer was then retrieved, <br /> and the sample contained within the bailer was examined for floating product levels and appearance of a <br /> petroleum product sheen. <br /> 13 HQnRgrin1_ff_dLPur dp <br /> ig <br /> Monitoring wells were purged using a Ceritrifugal pump capable of producing approximately 5 gallons per <br /> minute. Ground water removed from the wells was stored in 55-gallon barrels at the site. Ile barrels were <br /> labeled with cor-esponding monitoring well numbers and the date of purging. Purge water will be collected <br /> from the storage barrels in a vacuum truck and transported to an appropriate facility for treatment and/o; <br /> disposal. After purging,ground water levels were allowed to stabilize. A water sample was then removed <br /> from each of the wells by use of a Teflon bailer. Samples were collected in air-tight vials, appropriately <br /> labeled, and stored on ice from the time of collection through the time of delivery to the laboratory. A <br /> chain-of-custody form was completed to ensure sample integrity. Ground water samples were transperted <br /> to the laboratory and analyzed within the EPA-specified holding times for the requested analyses. <br /> MaN 41ha lining I I RNWMM� <br />