REMOVAL REMOVAL 1989 - Laserfiche WebLink

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• that has been prepared b4he laboratory. b. About one inch of soil should be removed from the immediate surface area where the sample is to be taken and the cylinder then pounded Into the soil with a wooden mallet. No headspace should be present in the cylinder , . . once the sample is collected. When the ., sample is collected, each end of .the cylinder should be covered with aluminum foil or capped with a polyethylene lid, taped, and labeled . C. The sample will then be immediately placed in an ice chest and kept at 4 degrees C for delivery to the laboratory. Care should be taken throughout to avoid contamination of both the inside and outside of the cylinder and its contents . d . Samples should be kept at 4 degrees C at the laboratory until they are analyzed . Holding time should not exceed 14 days from the time of collection. A portion of the sample should be removed and prepared for analysis according to approved EPA methods . e . In situations where the above procedure is Inappropriate, i .e . semi-solid samples, glass vials (properly prepared by the laboratory. ) with Teflon seal and screw cap should be used, and maintained at 4 degrees C until analysis . f . Organic lead: Tetraethyl/tetramethyl-lead are volatile; therefore, soil samples should be collected in cylinders and frozen as described for volatile hydrocarbons above . 5. Water Samples a . Ground water samples should be collected in a manner w:ii.ch reduces or ellmi.aztes the possi- bility of loss of volatile constituents from the sample . For collecting samples, a gas- actuated positive displacement pump or a submersible pump is preferred . A Teflon or stainless steel bailer is acceptable . Peri- staltic pumps or airlift pumps should not be used . b. Free floating product ( from a well ) : Sampling of free floating product on the surface of ground water should not be performed until -11-