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FIELD PROCF_.DURES <br /> The following section Jescribes field procedures that were completed by Delta personnel in the <br /> performance of the tasks invoived with this project. <br /> 1.0 OUARTERLY GROUND WATES SAIkIPMG <br /> LI firotntid Waic—,, and FEttBoXi—nz—P—r&dkO—D—tpib--D-dumiLnALin <br /> A water/petroleum product interface nrobe was used to determine free product thickness and ground water <br /> depti;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 /> LZ Subitylive. Analysis 12r!Qround Water <br /> Prior io purging of ground water monitoring wells, a water sample was collected from each monitoring <br /> well for subjective analysis. The retrieving of the sample involved gently lowering a clean, disposable <br /> Teflon bailer to approximately one-half the bailer length past the aiidliquid interface. The bailer was then <br /> retrieved, and the sample contained within the bailer was examined for floating product levels and <br /> appearance of a petroleum product she--i. <br /> 1.3 Monitoring 3yell Purging ang Sampling <br /> Monitoring wells were purged using a centrifugal pump capable of producing approximately 5 gallons <br /> per minute. Ground water remove; from the wells was stored in 55-gallon barrels at the site. The <br /> barrels were labeled with cor-esponding monitor ing well numbers and the date of purging. Purge water <br /> will be collected from the storage barrels in a vacuum truck and transporter to an appropriate facility for <br /> treatment and/or disposal. After purging,ground water levels were allowed to stabilize. Awater sample <br /> - <br /> was then removed from each of&,e wells by use of a Teflon bailer. Samples were collected in air fight <br /> vials, appropriately labeled, and stared on ice from the time of collection through the time of delivery <br /> to the laboratory. A chain-of-custody form was completed to ensure sample integrity. Ground water <br /> samples were transported to the laboratory and analyzed within the EPA-specified holding times for the <br /> reque:,:ed analyses. <br /> QMRIG9.HMD <br /> N <br />