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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 Safety Plan <br /> and the Site Safety Plan GR personnel and subcontractors who perform work at the site are briefed on the <br /> contents of these plans prior to initiating site work The GR geologist or engineer at the site when the work is <br /> performed acts as the Site Safety Officer GR utilizes a photoionization detector (PID) to monitor ambient <br /> conditions as part of the Health and Safety Plan <br /> Collection of Soil Samples <br /> Soil borings are drilled by a California-licensed well driller A GR geologist is present to observe the dnllmg, <br /> collect soli samples for description,physical testing,and chemical analysis,and prepare a log of the exploratory <br /> soil boring Soil samples are collected from the soil boring with a split-barrel sampling device fitted with <br /> 2-mch-diameter,clean brass tube or stainless steel liners The sampling device is driven approximately 18 inches <br /> with a 140-pound hammer falling 30 inches The number of blows required to advance the sampler each <br /> successive 6 inches is recorded on the boring log The encountered soils are 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 ends with teflon <br /> sheeting or aluminum foil, capped, labeled, and place in a cooler with blue ice for preservation A sham-of- <br /> custody form is initiated m the field and accompanies the selected soil samples to the analytical laboratory <br /> Samples are selected for chemical analysis based in part on <br /> a depth relative to underground storage tanks and existing ground surface <br /> b depth relative to known or suspected groundwater <br /> c depth relative to areas of known hydrocarbon impact at the site <br /> d presence or absence of contaminant migration pathways <br /> e presence or absence of discoloration or stammg <br /> f presence or absence of obvious gasoline hydrocarbon odors <br /> g presence or absence of organic vapors detected by headspace analysis <br /> Field Screenine of Soil Samples <br /> A PID is used to perform head-space analysis in the field for the presence of organic vapors from the soil sample <br /> This test procedure involves removing some soil from one of the sample tubes not retained for chemical analysis <br /> and immediately covering the end of the tube with a plastic cap The PID probe is inserted into the headspace <br /> inside the tube through a hole in the plastic cap Head-space screening results are recorded on the boring log <br /> Head-space screening procedures are performed and results recorded as reconnaissance data GR does not <br /> consider field screening techniques to be verification of the presence or absence of hydrocarbons <br />