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�,• V r d: AL <br /> r <br /> AEGIS ENyIROt�MENTAL, INC. <br /> STANDARD OPERATING PROCEDURES <br /> E <br /> RE; S'Al_BORING SAMPLING <br /> SOP-1 <br /> ' Soil samples for chemical analysis are collected in thin-walled brass tubes, 4-or 6-inches <br /> long by 2-inches outside diameter. Three or four of the tubes, plus a spacer tube, are <br /> s` set in a 2-inch inside diameter 18-inch split-barrel sampler. <br /> k <br /> € ►Nnere possible, the split-barre! sampler is driven its entire length either hydraulically or <br /> using a 140pound drop hammer. The sampler is extracted from the borehole and the <br /> Upon removal from the sampler, <br /> brass tubes, containing,i-le soil samples,are removed. <br /> the selected brass tubes are immediately trimmed and capped with either aluminum foil <br /> f g tape <br /> or Teflon sheets and plastic caps. They are then hermetically sealed owth danalyt cau <br /> -af-custody, l <br /> Labeled and refrigerated for delivery, under strict chain <br /> T -contamination and <br /> ,,, laboratory. These procedures minimize the potential for cross <br /> volatilization of volatile organic compounds (VOC) prior to chemical analysts. <br /> :.r One soll sample collected at each sampling interval is analyzed in the field using either <br /> a portable photoionization detector (Pisa), flame ionization detector, organic vapor <br /> analyzer, catalytic gas detector or an explosimeter. The purpose of this field analysis is <br /> to qualitatively determine the presence or absence of hydrocarbons, and the sam <br /> oratory. The soil samples sal5S � <br /> be analyzed at the lab is in either a brass tube, g 1a <br /> or plastic bag to allow for some volatilization of VOG. The Plsa is then used to measure <br /> the concentrations of hydrocarbons within the containers's head space. The data is <br /> ing logs at the depth corresponding to the <br /> recorded on both field notes and the bor <br /> sampling point. <br /> t the soil and/o, stratigraphic profile beneath <br /> Other soli samples are collected to documen <br /> the project site, and estimate the relative permeabiGt'/ of .he subsurface mat9rials. All <br /> ' <br /> drilling and sampling equipment are either steam-cleaned or washed in trisodium <br /> P solution and double-rinsed in delonized water prior to use at each site and <br /> between boreholes to minimize the potential for cross-contamination. <br /> r r� <br /> { <br /> ATTACHMENT150P 11Juna 1996 - <br />