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zr h+ <br /> Wt. srt R GtiOLOGicREsoUFtcEs , INc- <br /> STANDARD OPERATING PROCEDURES <br /> RE:SOIL SAMPLING <br /> SOP-2 <br /> Soil samples for chemical analysis are collected in thin-walled <br /> outside diameter. Four of these tubes and a spacer tube are set in a 2 Cbrass tubes, 4-inches long by 2-inches <br /> sampler. +a.ide diameter Minch split-barrel <br /> The split-barrel sampler is driven its enl ire length either hydraulically or using a 140- <br /> hammer. The sampler is extracted from the bore holo and the brass to 140-pound drop <br /> removed. Upon removal from the sampler,the sP:eeted brass tubes aro tubes, <br /> immediately bis, containing the soil samples, are <br /> with <br /> delivery, <br /> foil and plastic caps. They are thec hermetically scaled with duct tape,labeled andmed and <br /> efrigera�ted for <br /> delivery, under chain-of-custody, to the analytic laboratory. 'these procedures minimise the <br /> cross-contamination and volatilization of volatile organic compounds{VOC)prior to chemical a Potential <br /> for <br /> E f - <br /> One soil sample collected at each sampling interval is analyzed in the field using either a photoionizati } <br /> detector(PID),a flame ionization detector FID <br /> qualitatively determine the presence or absence of hydrocor an arbons andtowhich on <br /> P►n•P�of this field anal <br /> analyzed at the laboratory. _analysis is to , <br /> The soil sample is sealed in a zip-lock plastic bag and placed the sun to enhancbe <br /> e <br /> volatilization of the hydrocarbons from the sample. The data is recorded on the drill 1 <br /> corresponding to the sampling point. ogs at the depth . <br /> Other soil samples are collected to document the stratigraphy and estimate relative <br /> subsurface materials. All drilling and sampling equipment are steam-cleaned nor to Permeability of the <br /> ` between boreholes to minimize the potential for cross cacat are stea p use at each site and <br /> i <br /> i <br /> SOP-2;pct/$a <br />