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. 2r a a— <br /> ,,try". y <br />�s <br />,N:!s <br /> eGROUMY4ATER TECHNOLOGY <br /> STAKDARD OPERATING PROCEDURE. <br /> CONCERNING SOIL SAILING MMODOLOGY <br /> SOP 24 <br /> Goll samples should be collected and preserved in <br /> accordance with Groundwater Technology Laboratory's <br /> Etmndard O.,lawating Procedure (GTL SOP 15) concerning <br /> Boil Sample Collection and Handling when -Sampling for <br /> 4 Volatile Organise. A hollow stem soil auger should be <br /> used to drill to the desired sampling depth. A standard <br /> 2 inc'zz diameter split spoon sampler 1S inchea in length <br /> shall be used to collect the samples. The samples are <br /> contained in 2 inch diameter by 6 inch long thin walled <br /> brans tube liners fitted into the split spoon sampler <br /> (three par 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 cantered <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 vhree soil samples retreived at each sample <br /> depth shall be analyzed in the field using a photoioni- <br /> "" nation 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 r„ancentrations <br /> and to enable compar.isions between the fisid and <br /> laboratory analyses. The soil sample shall ba 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 inctruments shall be used to <br /> 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 corresponding to the sample point. <br /> < F <br /> rrlCROUN ATER <br /> TGC'H%OLIK11%C <br />