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GETTLER-RYAN DiC. FIELD METHODS AND PROCEDURES Site Safety Plan Field work performed by Gettler-Ryan Inc. (GR) is conducted in accordance with GR's Health and Safety Plan and the Site Safety Plan. GR personnel and subcontractors who perform work at the site are briefed on the contents of these plans prior to initiating site work. The GR geologist or engineer at the site when the work is performed acts as the Site Safety Officer. GR utilizes a photoionizarion detector (PID) to monitor ambient conditions as part of the Health and Safety Pian. Collection of Samples Soil samples are collected from the wall or base of the excavation with a hand-driven sampling device fitted with a ?-inch-diameter, clean brass tube or stainless steel liner. If safety considerations preclude collection of the samples with the drive sampler, the excavating equipment is used to bri;g soil from the pit wall to the surface, where a sample tube is filled by driving it into the soil in the excavator's bucket. After removal from the sampling device, sample tubes are covered cn both ends with teclon sheeting, capped, labeled, and place in a cooler with blue ice for preservation. A chain-of-custody_ form is initiated in the field and accompanies the selected soil samples to the analytical laboratory. If it is necessary to collect a sample of groundwater standing in the UST pit, the sample is collected by lowering a new, clean teflon bailer into the pit from a safe position along the pit wall. Once filled and retrieved, the groundwater in the bailer is carefully decanted into the appropriate containers supplied by the analytical laboratory. If required, preservative is added to the sample battles by the laboratory prior to delivery. The samples are then labelled and place in a cooler with blue ice for preservation. A chain- of-custody hain- ofcustody form is initiated in the field and accompanies the selected soil samples to the analytical laboratory. Field Screening of Soil Samples A PID is used to perform head-space analysis in the field for the presence of organic vapors from soil samples. This test procedure. involves placing a small amount of the-soil to be screened in a sealable plastic bag. The bag is warmed in the sun to allow organic compounds in the soil sample to volatilize. The PID probe is inserted through'the wall of the bag and into the headspace inside, and the meter reading is recorded in the field notes. An alternative method involves placing a plastic cap over the end of the sample tube. The PID probe is placed through a hole in the plastic cap, and vapors with the covered tube measured. Head-space screening is performed and results recorded as reconnaissance data only. GR does not consider field screening techniques to be verification of the presence or absence of hydrocarbons. Storing and Samp"z of Soil Stockzp•Ies Excavated material is stockpiled on and covered with plastic sheeting. Stockpile samples are collected and analyzed for disposal classification on the basis of one composite sample per 100 cubic yards of soil. Stockpile samples are composed of four discrete soil samples, each collected from an arbitrary location on the stockpile. The four discrete samples are then composited in the laboratory prior to analysis.