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WESTERN GEOLOGIC RESOURCES , INC <br /> STANDARD OPERATING PROCEDURES <br /> RE STOCKPILE SOIL SAMPLING <br /> SOP-5 <br /> Soil samples from soil stockpiles are collected in thin-walled,flinch long by 2-inch outside diameter brass <br /> tubes The sampling protocol for stockpile sampIing is determined by the dimensions of the soil pile An average <br /> of one soil sample per ten cubic yards is collected The samples are composted prior to chemical analysis The <br /> number of samples in a composite depends on the amount of cubic yards of soil Typically, composites are made <br /> up of a minimum of two samples, and range up to a maximum of four samples <br /> s� The sampling tools used are hand driven sampling devices that maintain the physical integrity of the <br /> samples while minimizing volatilization Upon removal from the sampling device, the tubes are immediately <br /> r trimmed and sealed with aluminum foil and plastic end caps They are then hermetically sealed with duct tape, <br /> labeled, and refrigerated until delivery, under chain-of-custody, to the laboratory <br /> l <br /> r 4' <br /> r <br /> ..q <br /> i <br />