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MIA i <br /> �•.�w say <br /> 3 <br /> GROUNDWATER TECHNOLOGY <br /> ` STANDARD OPERATING PROCEDURE. <br /> CONCERNING SOIL SAMPLING KMODOLOGY <br /> SOP 24 <br /> Soil samples should be collected and preserved in <br /> accordance with Groundwater Technology Laboratory's <br /> Standard Operating Procedure (GTL SOP 15) eoncatming <br /> a Soil Sample Collection and Handling when Sampling for <br /> Volatile Organics. A hollow stem soil auger should be <br /> used to drill to the desired sampling depth. A standard <br /> 2 inch diameter split spoon sampler 15 inches in length <br /> shall be used to collect the samples. The samples are <br /> contained in 2 inch diameter by 6 inch long thin bralled <br /> brass tube liners fitted into the split spoon sampler <br /> (three per sampler) . <br /> The split spoon sampler should be driven the full depth <br /> of the spoon into the soil using a 140 pound hammer. <br /> The spoon shall then be extracted from the borehole and <br /> the brass tube liners containing the soil sample removed <br /> from the sampler. The ends of the liner tubes should be <br /> immediately covered with aluminum foil, sealed with a <br /> teflon or plastic cap, and then taped with duct tape. <br /> After being properly identified with sample data entered <br /> on a standard chain of custody form the samples shall be <br /> placed on dry ice (maintained below 4'C) and transported <br /> to the laboratory within 24 hours. <br /> One of the three soil samples retreived av each sample <br /> depth shall be analyzed in the field using a photoioni- <br /> zatir�n detector and/or explosimeter. The purpose of the <br /> field analysis is to provide a means to choose samples <br /> to be laboratory analyzed for hydrocarbon concentrations <br /> and to Qnable comparisions between the field and <br /> laboratory analyses, The soil sample shall be sealed in <br /> a plastic bag and placed in the sun to accelerate the <br /> vaporization of volatile hydrocarbons from the soil. one <br /> of the two field vapor instruments shall be used to <br /> µ quantify the amount of hydrocarbon released to the air <br /> from the soils. The data shall be recorded on the drill <br /> logs at the depth corresporuing to the sample point. <br /> Gata"snu%TER <br /> `" TEcH%0L 1G5.I%c <br />