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AEGIS ENVIRONMENTAL, INC. <br /> STANDARD OPERATING PROCEDURES <br /> RE: SOIL BORING SAMPLING <br /> SOP-1 <br /> Soil samples for chemical analysisare <br /> rThrelle ore ourlthin-walled <br /> of the tubes, plus a spacerrtube, are <br /> long by 2-inches outside diameter <br /> set In a 2-inch inside diameter 18-inch split-barrel sampler. <br /> Where passible, the split-barrel sampler is driven its entire length either hydraulically or <br /> using a 140-pound drop hammer. The sampler is extracted from the borehole and the <br /> brass tubes, containing the soil samples, are removed. Upon removal from the sampler, <br /> the selected brass tubes are immediately trimmed and capped with either aluminum foil <br /> or Teflon sheets and plastic caps. They are then hermetically sealed with duct tape, <br /> labeled and refrigerated for delivery, under strict chain-of-custody, to the analytical <br /> iaboratory. These procedures minimize the potential for cross-contamination and <br /> volatilization of volatile organic compounds (VOC) prior to chemical analysis. <br /> One soil sample collected at each sampling interval is analyzed in the field using either <br /> a portable photoionization detector (PID), flame ionization detector, organic vapor <br /> analyzer, catalytic gas detector or an explosimeter. The purpose of tahisdfiel anasamples sis is <br /> ce or absence of hydrocarbons, les to <br /> to qualitatively determine the presen <br /> be analyzed at the laboratory. The soil sample is sealed in either a brass tubeThe is then , glass jar <br /> to measure <br /> or plastic bag to allow for some volatilization of <br /> VOC <br /> cantaine s'slDhead space used The data is <br /> the concentrations of hydrocarbonsi within t <br /> recorded on both field notes and the boring logs at the depth corresponding to the <br /> sampling point. <br /> - Other sail samples are collected to document the sobiil and/or <br /> st ensue facephic pmate le be eacAll <br /> h <br /> the project site, and estimate the relative permea ty <br /> are either steam-cleaned or washed in trisodium <br /> drilling and sampling equipment <br /> Phosphate solution and double-rinsed dei for cross <br /> ater priornation.toa at each site and <br /> between boreholes to minimize the potential <br /> 50P-1/Oct. 1990 <br />