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at 52 s � ? <br /> 'N a <br /> I <br /> GROUNDWATER TECBNOLOGY, INC. <br /> STANDARD OPERATING PRGCEDO-RE <br /> ., CONCMZXING SOIL SAMPLING XM0DO1_,,0GY <br /> SOP 14 <br /> Soil samples should be collected and preserved in accordance <br /> with Groundwater Technology Laboratory's Standard Operating <br /> Procedure (GTL SOP 15) concerning Soil SaMple Collection and <br /> Handling when Sampling for Volatile Organics. A ho.11aw-stem <br /> soil auger should be used to drill to the desired sampling <br /> depth. A standard 2-inch-diameter, split-spoon sampler, <br /> 18-inches in length shall be used to collect the samples. <br /> The samples are contained in 2-inch-diameter by 6-inch-long <br /> thin-walled, brass tube liners fitted into the split-spoon <br /> sampler (three per sampler) . <br /> The split-spoon sampler should be driven the full depth of <br /> the spoon into the soil using a 140-pound hammer. The spoon <br /> shall then be extracted froL the borehole and the brass tube <br /> liners containing the soil sample removed from tory sampler. <br /> The ends of the liner tubes should be immediately covered <br /> with aluminum foil, sealed with a TeflonR or plastic cap, <br /> and then taped with duct tape. After being properly <br /> identified with sample data entered on a standard <br /> chain-of-custody form, the samples shall be placed on dry <br /> ice (maintained below 41celsius) and transported to the <br /> laboratory within 24 hours. <br /> one of the three soil samples retrieved at each sample depth <br /> shall be analyzed in the field using a photo-ionization <br /> detector and/or explosimeter. The purpose of the field <br /> analysis is to provide a means to choose samples to be <br /> labor;:tory analyzed for hydrocarbon concentrations and to <br /> enable comparisons between the field and laboratory <br /> analyses. The soil sample shall be sealed i.n a plastic bag <br /> and placed in the sun to accelerate the vaporization of <br /> volatile hydrocarbons from the soil. One of the two field <br /> vapor instruments shall be used to quantify tho amount of <br /> hydrocarbons released into the air from the soils. The <br /> data, shall be recorded on the drill logs at the depth <br /> corresponding to the sample point. <br /> „ rkCH�l�I.If�1.I�C' <br /> ` . l <br />