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<br /> AEGIS ENVIRONMENTAL INC.
<br /> k STANDARD OPERATING PROCEDURES
<br /> RE: SOIL BOSSING SAMPLING
<br /> SOP-1
<br /> Soil samples for chemical analysis are collected in thin-walled brass tubes,4-or 8-inches
<br /> "A long by 2-inches outside diameter. Three or four of the tubes, plus a spacer tube, are
<br /> set in a 2-inch inside diameter 18-inch split-barrel sampler.
<br /> Where possible, the split-barrel sampler is driven its entire length either hydraulically or
<br /> i 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 /> p=+ the selected brass tubes are immediately trimmed and capped with either aluminum foil
<br /> d 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 /> laboratory. 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 this field analysis is
<br /> to qualitatively determine the presence or absence of hydrocarbons, and the samples to
<br /> I be analyzed at the laboratory. The soil sample is sealed in either a brass tube, glass jar
<br /> .� or plastic bag to allow for some volatilization of VOC. The PID is then used to measure
<br /> the concentrations of hydrocarbons within the cantainers's head space. The data is
<br /> recorded on both field notes and the boring logs at the depth corresponding t4 the
<br /> �7 sampling point.
<br /> Other soil samples are collected to document the soil and/or stratigraphic profile beneath
<br /> the project site, and estimate the relative permeability of the subsurface materials. Al! r
<br /> drilling and sampling equipment are either steam-cleaned or washed in trisodium
<br /> phosphate solution and double--rinsed in deionized water prior to use at each site and
<br /> between boreholes to minimize the potential for cross-contamination.
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<br /> ATTACHMENT/SOP.1/Junc 1%0
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