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GEOSTRATEGIES <br /> FIELD METHODS AND PROCEDURES <br /> Site Safety_Plan <br /> Field work performed by GeoStrategies(GSI) is conducted in accordance with GSI's Health <br /> and Safety Plan and the Site Safety Plan. GSI personnel and subcontractors who perform <br /> work at the site are briefed on the contents of these plans prior to initiating site work. The <br /> GSI geologist or engineer at the site when the work is performed acts as the Site Safety <br /> Officer. GSI utilizes a photoionization detector(PID) to monitor ambient conditions as part <br /> of the Health and Safety Plan. <br /> Collection of Sampie� <br /> Soil samples are collected from the wall or base of the excavation with a hand-driven <br /> sampling device fitted with a 2-inch-diameter, clean brass tube or stainless steel liner. If <br /> safety considerations preclude collection of the samples with the drive sampler, the <br /> excavating equipment is used to bring soil from the pit wall to the surface, where a sample <br /> E . tube is filled by driving it into the soil in the excavator's bucket. After removal from the <br /> sampling device, sample tubes are covered on both ends with teflon sheeting, capped, <br /> labeled, and place in a cooler with blue ice for preservation. A chain-of-custody form is <br /> initiated in the field and accompanies the selected soil samples to the analytical laboratory. <br /> If it is necessary to collect a sample of groundwater standing in the UST pit, the sample <br /> is collected by lowering a new, clean teflon bailer into the pit from a safe position along <br /> the pit wall. Once filled and retrieved, the groundwater in the bailer is carefully decanted <br /> into the appropriate containers supplied by the analytical laboratory. If required, <br /> preservative is added to the sample bottles by the laboratory prior to delivery. The samples <br /> are then labelled and place in a cooler with blue ice for preservation. A chain-of-custody <br /> form is initiated in the field and accompanies the selected soil samples to the analytical <br /> laboratory. <br /> Field Screening of Soil Samples <br /> A PID is used to perform head-space analysis in the field for the presence of organic <br /> vapors from soil samples. This test procedure involves placing a small amount of the soil <br /> to be screened in a sealable plastic bag. The bag is warmed in the sun to allow organic <br /> compounds in the soil sample to volatilize. The PID probe is inserted through the wall of <br /> the bag and into the headspace inside, and the meter reading is recorded in the field notes. <br /> A-1 <br />