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ARCADIS GERAGHTY&MILLER characteristics and to perform field observations for the presence of organic vapor concentrations (OVLs) OVLs were measured using a Flame Ionization Detector (FID) In order to measure the OVL, a portion of soil at each sampling interval, was placed into a plastic bag, which was sealed and allowed to volatilize for a mu imum of five minutes The tip of the FID was then inserted into the bag and the OVL was measured and recorded on the boring log The boring log form was used to document drilling activities and observations The Unified Soils Classification System(USCS)was used to log htholognes 1 4 2 2 Simultaneous Soil and Groundwater Sampling Commencing at the depth at which groundwater was encountered (approximately 30 ' feet bgs), groundwater samples were collected at ten foot intervals using a Sunulprob&rm sampling device The Sunulprob6m (Figure 4-1) is an nn-situ sampling device, shaped much y like a split spoon sampler, which allows the simultaneous collection of in-situ liquid with soil core The purpose of the Simulprob6m is to collect soil samples and liquid samples at the same depth interval The paired samples can be simultaneously and economically collected in one sampling event This paired sampling technique provides the opportunity to investigate the relationship between contaminant distribution and stratigrapbic characteristics, and to compare ' contaminant concentration in liquid with that found in directly correlative soil core ' 4 2 3 SimuE robe Sam lin ' Prior to each sampling event, the Simulprob6rm was steamcleaned and new consumables (i a Teflon tubing, o-rungs, brass tubes, etc) were used To miiumme the ' potential of water entrained within the augers from entering the Sinulprob6m while it is lowered to its proposed sampling depth, the Sinulprobe m was pressurized with nitrogen gas A latex condom was rolled on from the shoe along the bottom half of the probe to prevent cross-contaminating subsequent soil samples The latex condom also functions as a secondary ' 14