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WI S -t EIINGI� OI. OGIC Rt� SOUIICI- S , INC <br /> STANDARD OPERATING PROCEDURES <br /> RE SOIL SAMPLING <br /> SOP-2 <br /> Soil samples for chemical analysis are coIILcILd in thm-walled brass tube.%, 4-inchLs hong by 2-inchLs <br /> outside diameter Four of these tubes and a spacer tube are set in a 2-inch inside dlamCtLr 18-inch <br /> split-barrel sampler <br /> The split-barrel sampler is driven its entire length either hydraulically or using a 140-pound drop <br /> hammer The sampler is extracted from the borehole and the brass tubes, containing the soil samples, <br /> _ are removed Upon removal from the sampler, the selected brass tubes are immediately trimmed and <br /> capped with aluminum foil and plastic caps They are then hermLUcally sealLd with duct tape, lakled <br /> and refrigerated for delivery, under chain-of-custody, to the analytic laboratory These procedures <br /> minimize the potential for cross-contamination and volatilization of volatilL organic compounds (VOC) <br /> prior to chemical analysis <br /> One soil sample collected at each sampling interval is analyzed in the field using other a photojoniiation <br /> detector (PID), a flame ionization dLtector (FID),or an explosimLter ThL purpose of this field analysis <br /> is to qualitatively determine the presence or absence of hydrocarbons and to establish which soil samplLs <br /> will be analyzed at the laboratory The soil sample is sealed in a np-lock plastic bag and placed in the <br /> sun to enhance volatilization of the hydrocarbons from the sample The data is recorded on the drill <br /> logs at the depth corresponding to the sampling point <br /> Other soil samples are collected to document the stratigraphy and estimate relative permeability of the <br /> subsurface materials All drilling and sampling equipment are steam-cleaned prior to use at each sitL <br /> and between boreholes to minimize the potential for cross-contamination <br /> ME <br /> Mablu <br /> �V•nw <br />