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,w <br /> r� <br /> x <br /> GETTLER-RYAN INC. <br /> FIELD METHODS AND PROCEDURES <br /> Site Safety Plan <br /> Field work performed by Gettler-Ryan Inc (GR) is conducted in accordance with GR's Health and <br /> Safety Plan and the Site Safety Plan GR personnel and subcontractors who perform work at the <br /> site are briefed on the of these plans contents prior to initiating site work The GR geologist or <br /> engineer at the site when the work is performed acts as the Site Safety Officer GR utilizes a <br /> photoionization detector(PID)to monitor ambient conditions as part of the Health and Safety Plan <br /> Collection of Soil Samples <br /> Exploratory soil borings are drilled by a California-licensed well driller A GR geologist is present <br /> to observe the drilling, collect soil samples for description, physical testing, and chemical analysis, <br /> and prepare a log of the exploratory soil boring Soil samples are collected from the exploratory <br /> soil boring with a split-barrel sampler or other appropriate sampling device fitted with clean brass <br /> or stainless steel 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 each successive <br /> . 6 inches is recorded on the boring log The encountered soil is described using the Unified Soil <br /> Classification System(ASTM 2488-84) and the Munsell Soil Color Chart <br /> After removal from the sampling device, soil samples for chemical analysis are covered on both <br /> ends with Teflon sheeting or aluminum foil, capped, labeled, and placed in a cooler with blue ice <br /> for preservation A chain-of-custody form is initiated in the field and accompanies the selected soil <br /> samples to the analytical laboratory Samples are selected for chemical 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 />