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Artesian Environmental Consultants, L., <br /> Standard Operating Procedures <br /> SOIL EXCAVATION AND SAMPLING <br /> Excavated soil is screened and segregated in the field using a vapor analyzing device such <br /> as a photo-ionization detector(PID)or organic vapor analyzer(OVA). Documentation of <br /> soil removal activities include field reports and photographs. After the removal of soil <br /> having obvious staining,odor or detectable levels of organic vapors as detected on a PID or <br /> OVA,confirmatory soil samples in the walls and floor of the excavation will be selected at <br /> least every 20 feet laterally. Additional samples will be selected on the recomm-,ndation of <br /> the geologist and regulator. All sampling will be performed with a backhoe. <br /> 4 ' <br /> ET Soil samples for chemical analysis are collected in pre-cleaned,thin-walled tubes, typically <br /> S-inches long and 2-inches in the outside diameter. The sample tube is pushed into the <br /> native soil near the teeth of the backhoe bucket. The brass tube is immediately capped on <br /> both ends with teflon tape,trimmed and hermetically sealed with plastic end caps. The <br /> samples are then labeled and placed in individual see-through zip-loch plastic storage bags. <br /> The samples are stored in an ice chest with crushed ice to maintain a constant temperature <br /> t of 4 degrees Celsius. A thermometer is kept in the ice chest to ensure that the proper <br /> 1 ` ` temperature is maintained. The samples are then delivered under chain-of-custody <br /> procedures to a state-certified hazardous materials testing laboratory. The above mentioned <br /> ¢ procedures minimize the potential for cross-contamination and volatilization of volatile <br /> "- organic compounds(VOCs)prior to chemical analysis. <br /> ti <br /> S i <br /> 1 <br /> A <br /> f <br /> 2 <br />