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f <br /> E � <br /> GROUNDWATER TECHNOLOGY, INC. <br /> STANDARD OPERATING PROCEDURE <br /> CONCERNING SOIL SAMPLING METHODOLOGY <br /> SOP 14 <br /> 1. Soil samples should be collected and preserved in accordance with Groundwater Technology <br /> Standard Operating Procedure (SOP 15) concerning Soil Sample Collection and Handling when <br /> Sampling for Volatile Organics. A hollow stem soil auger should be used to drill to the desired <br /> sampling depth. A standard 2 Inch diameter split spoon sampler 18 inches in length shall be used <br /> to collect the samples. The samples are contained in 2 inch diameter by 6 inch long thin walled <br /> brass tube liners fitted into the split spoon sampler (three per sampler). <br /> 2. The split spoon sampler should be driven the full depth of the spoon into the soil by a 140 pound <br /> hammer. The spoon shall then be extracted from the borehole and the brass tube liners containing <br /> the soil sample removed from the sampler. The ends of the liner tubes should be immediately <br /> covered with aluminum fail, seated with a teflon or plastic cap, and taped with duct tape. After <br /> being properly Identified with sample data entered on a standard chain of custody form the samples l <br /> shall be placed on dry ice (maintained below 4—C) and transported to the laboratory within 24 <br /> f hours. <br /> 3. One of the three soil samples retrieved at each sample depth shall be analyzed in the field using <br /> a photoionization detector and/or explosimeter. The purpose of the field analysis is to provide a <br /> means to choose samples to be laboratory analyzed for hydrocarbon concentrations and to enable <br /> comparisons between the field and laboratory analyses. The soil sample shall be sealed in a plastic <br /> bag and allowed to equilibrate with the air surrounding the soil for approximately 10 minutes. One <br /> of the two field vapor instruments shall be used to quantify the amount of hydrocarbon released to <br /> the air from the soils. The data shall be recorded on the drill logs at the depth corresponding to <br /> the sample point. <br /> M <br /> } <br /> F <br /> -!GROUNDWATER <br /> E_ �. ;TECHNOLOGY,INC. <br />