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GEOSTRATEGIES <br /> FIELD METHODS AND PROCEDURES <br /> Site Safety Plan <br /> Field work performed by GeoStrategies Inc (GSI) is conducted in accordance with GSI's <br /> Health and Safety Plan and the Site Safety Plan GSI personnel and subcontractors who <br /> perform work at the site are briefed on the contents of these plans prior to initiating site <br /> work The GSI geologist or engineer at the site when the work is performed acts as the Site <br /> Safety Officer GSI utilizes a photoionization detector (PID) to monitor ambient conditions <br /> as part of the Health and Safety Plan <br /> Collection Qf Soil Samples <br /> Soil borings are drilled by a California-licensed well driller A GSI geologist is present to <br /> observe the drilling, collect soil samples for description, physical testing, and chemical <br /> analysis, and prepare a log of the exploratory soil boring Soil samples are collected from <br /> the soil boring with a split-barrel sampling device fitted with 2-inch-diameter, clean brass <br /> tube or stainless steel liners The sampling device is driven approximately 18 inches with <br /> a 140-pound hammer falling 30 inches The number of blows required to advance the <br /> sampler each successive 6 inches is recorded on the boring log The encountered soils are <br /> described using the Unified Soil Classification System (ASTM 2488-84) and the Munsell <br /> Soil Color Chart <br /> After removal from the sampling device, soil samples for chemical analysis are covered on <br /> both ends with teflon sheeting or aluminum foil, capped, labeled, and place in a cooler with <br /> blue ice for preservation A chain-of-custody form is initiated in the field and accompanies <br /> the selected soil samples to the analytical laboratory Samples are selected for chemical <br /> analysis based on <br /> a depth relative to underground storage tanks and 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 analysis <br /> A-1 <br />