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.yam - 'iT +€;'�'' —ug _ aw <br /> n k <br /> ri• <br /> s <br /> B.3.2 Monitoring Well Development and Sampling <br /> The wells are developed to reduce the effects of drilling on the formation and to increase <br /> the effective hydraulic radius of the well. <br /> Monitoring wells are generally developed 24 to 48 hours after installation to allow the <br /> grout to set. Each well is first sampled with a clear acrylic bailer to visually inspect for <br /> hydrocarbon layer or sheen. if no product layer or sheen is observed on the water,the well <br /> is developed by surging, pumping, or bailing. Surging along the screened interval of the <br /> well is performed to draw the sediment from the formation into the filter pack and the Weil <br /> and to set the sand pack. The sediment laden water is purged from the well at a rate of <br /> between 0.75 to 10 gallons per minute (gpm) depending on recharge rate and casing size. <br /> Development continues until the discharge <br /> rom each monitoring welruns relatively clear of fines. <br /> SDischuge water,is <br /> to 10 well volumes are generally removed <br /> stored in 55-gallon drums and left onsite for later discharge or disposal by the client, <br /> depending on laboratory results. <br /> After the wells are developed, the aquifer is allowed to equilibrate for at least 24 to 48 <br /> hours. The wells can then be purged and sampled. Purging and sampling may be <br /> accomplished with Teflon bladder pumpn�nd/ rbailers. Dnnrare � the purging s�p}£5 else, <br /> field parameters (pH, conductivity, temperature) <br /> collected after the field parameters have stabi'rized `-formally :eQufr_ng the removal of <br /> three to five well volumes). Water sampling containers are supplied and prepared by the <br /> laboratory. These sample containers are immediately sealed after sample collection and <br /> placed in an iced cooler. At the end of the day, the water samples are delivered under <br /> chain-of-custody to an analytical laboratory certified by the state for the planned chemical <br /> analysis. <br /> B-3.3 Sample Handling ' <br /> After labeling, the sample is immediately stored in an iced cooler for transport <br /> theort to the <br /> and <br /> analytical laboratory. The label includes Kleinfelder's name, j <br /> ob time thesample was collected,'the employee number of the individual who performed the <br /> sampling, and a unique five-digit sample_identification-number.-A custody-seal is also _ <br /> in such a way that any attempt to tamper with the sample is easily <br /> placed on the sample <br /> F6-FIELDPRO <br />