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The groundwater sample will be obtainers with a TeflonrM or a disposable polyethylene bailer <br /> equipped with a bottom-emptying valve To release water from the bailer with minimal aeration, the <br /> protrusion on the bottom-emptying device actuates the bottom check valve and regulates the flow into the <br /> sample bottle <br /> The sample containers will be obtained precleaned from the analytical laboratory, and it will be <br /> specific with respect to size and material to the type of analysis to be performed The container will be <br /> carefully filled to the very top, in order to create a positive meruscus, and sealed with a TeflonTM lined cap <br /> (septa) These precautions aid m elimmati ig air from the sample The sample will be visually inspected to <br /> ensure that no air bubbles remain within. <br /> Depending on the type of analysis required, samples will be preserved with a chemical preservative <br /> and/or cooled to 4 degrees Celsius Samples then will be labeled, stored, and transported in cooled ice <br /> chests to the analytical laboratory within the permissible holding time <br /> SAMPLING FROM STOCKPILES AND EXCAVATIONS <br /> Soil samples from stockpiles are composites, collected at a rate of one composite sample for every <br /> 50 cubic yards of soil The composite sample consists of about three, and not more than four, individual <br /> soil samples of approximately equal volume The individual soil samples will be collected using a <br /> decontaminated stainless steel trowel or an impact sampler- The soils will be packed into a 2-inch by <br /> 6-inch brass tube, and the ends of the tube will be covered with aluminum foil and plastic end caps The <br /> end caps will be taped m place with duct or plastic electrical tape The individual soil samples comprising <br /> the composite soil sample will be homogenized at the analytical laboratory <br /> Soil samples from excavations will be collected using a decontaminated stainless steel trowel or an <br /> impact sampler They will be packed individually into 2-inch by 6-inch brass tubes The ends of the tubes <br /> will be covered with aluminum foil and plastic end caps, and the end caps will be taped in place with duct <br /> or plastic electrical tape For deep excavations that are not safe to enter, the soil samples will be collected <br /> from the bucket of a backhoe or other excavating machinery, which has scraped soil from the excavation <br /> wall or floor, as directed by the on-site geologist <br /> Soil samples from the product-piping trenches of underground storage tanks will be collected as <br /> described above, at a rate of one sample for every 20 feet of pipeline trench <br /> Water samples from excavations will be collected by lowering Into the cavity, a decontaminated glass <br /> far or bottle at the end of a rope or rod The water in the glass container will be slowly poured into <br /> 40-milliliter vials to a height that forms a positive meniscus at the rim of the vial The vials will be capped <br /> with lids having Teflorim septa., and they will be inspected to ensure that no air bubbles remain within <br /> All samples will be labeled and handled as described in the Brown and Caldwell operating procedure <br /> entitled Sample Handling <br /> 2417%REPORTSIWKPi.1 DOC <br />