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used in sampling for volatile organics. These bottles will be filled completely to prevent air from <br /> remaining in the bottle. A positive meniscus forms when the bottle is completely full. A convex <br /> Teflon septum is placed over the positive meniscus to eliminate air. After the bottle is capped, it is <br /> inverted and tapped to verify that it contains no air bubbles. The sample containers for other <br /> parameters will be filled, filtered as required,and capped. <br /> To determine dissolved concentrations of metals, appropriate field filtration techniques will be <br /> used. When a Teflon bailer is used, the sample will be filtered by emptying the contents of the <br /> bailer into a pressure transfer vessel. A disposable 0.45-micron acrylic copolymer filter will be <br /> threaded onto the transfer vessel at the discharge point and the vessel will be sealed. Pressure will <br /> be applied to the vessel with a hand pump and the filtrate will be directed into the appropriate <br /> containers. Each filter will be used once and discarded. <br /> When a bladder pump is used to collect samples for dissolved constituents, the sample will be <br /> filtered by attaching a disposable 0.45-micron acrylic copolymer filter directly to the pump <br /> effluent line with a pressure fitting. As the pump cycles, the effluent will be pressured through <br /> the filter and directed into the appropriate containers. Each filter will be used once and discarded. <br /> Spring (or Surface Water) Sampling <br /> If sufficient flow is observed, spring (or surface water) samples will be collected with a dipper <br /> consistent with the procedures listed in Section 9 of the document entitled "Test Methods for <br /> Evaluating Solid Waste: Physical/Chemical Methods," S -846, 3rd edition, November 1986. If <br /> low-flow conditions are encountered, a stainless steel scoop will be used to collect samples. The flat <br /> bottom of the scoop will be pressed against the bank and the water will flow with little disturbance <br /> into the scoop. Samples collected with a dipper or scoop will be transferred into the appropriate <br /> sample containers. Spring(or surface water)samples will be filtered as required. <br /> Leachate Sampling <br /> If leachate sampling and analysis are required, samples will be collected after purging <br /> approximately one casing volume using a Teflon bailer. Leachate samples will be filtered as <br /> required and transferred into the appropriate containers. <br /> SAC\S:\WES\S&APROC.DOC-95\w:1 4 <br />