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NV/ <br /> GEOSTRATEGIES INC. <br /> 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 tube or stainless <br /> steel liners. The sampling device is driven approximately 18 inches with a 140- <br /> 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 <br /> soils are described using the Unified Soil Classification System (ASTM 2488-84) <br /> and 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 and existing ground <br /> 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 />