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GSI FIELD METHODS AND PROCEDURES <br /> Site Safety Plan <br /> Field work performed by GeoStrategies Inc (GSI) is conducted in accordance <br /> with GSI's Health and Safety Plan and the Site Safety Plan GSI personnel and <br /> subcontractors who perform work at the site are briefed on the of these plans <br /> contents prior to initiating site work The GSI geologist or engineer at the site <br /> when the work is performed acts as the Site Safety Officer GSI utilizes a <br /> photoionization detector (PID) to monitor ambient conditions as part of the Health <br /> and Safety Plan <br /> Collection of Soil Samples <br /> Exploratory soil borings are drilled by a California-licensed well driller A GSI <br /> geologist is present to observe the drilling, collect soil samples for description, <br /> physical testing, and chemical analysis, and prepare a log of the exploratory soil <br /> boring Soil samples are collected from the exploratory soil boring with a split- <br /> barrel sampling device fitted with 2-inch-diameter, clean brass or stainless steel <br /> liners The sampling device is driven approximately 18 inches with a 140-pound <br /> hammer falling 30 inches The number of blows required to advance the sampler <br /> each successive 6 inches is recorded on the boring log. The encountered soils <br /> are described using the Unified Soil Classification System (ASTM 2488-84) and <br /> the Munsell Soil Color Chart <br /> After removal from the sampling device, soil samples for chemical analysis are <br /> covered on both ends with teflon sheeting or aluminum foil, capped, labeled, and <br /> 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 <br /> laboratory Samples are selected for chemical analysis based on. <br /> a depth relative to underground storage tanks, product lines, and <br /> existing ground surface <br /> b depth relative to known or suspected groundwater <br /> C presence or absence of contaminant migration pathways <br /> d presence or absence of discoloration or staining <br /> e presence or absence of obvious gasoline hydrocarbon odors <br /> f presence or absence of organic vapors detected by headspace <br /> analysis <br /> GeoStrategies Inc. <br />