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detected at a depth of 55 10 feet, but despite several attempts, the total depth of the well could not be determined with certainty According to Mr Teresi, a previous consultant had utilized a similar water level meter and determined that the depth was approximately 170 feet However, Upgradient believes that the water level meter did not reach the bottom of the well After the water depth measurements were recorded, a translucent plastic disposable bailer was lowered into the well and allowed to fill When the bailer was removed, a thin film of black hydrocarbon liquid with a strong diesel odor was observed on the surface of the bailer water After a brief discussion between PHS/EHD, Upgradient, and Teresa, a decision was made not to sample the well A representative of Welenco then set up the video camera survey A portable downhole video camera was lowered from the rear of Welenco's van into the well Upgradient and the other observers watched the monitor as the probe was lowered into the well The groundwater interface was penetrated at a depth of approximately 54 feet, where a thin black layer or film of hydrocarbon product was observed floating on the water surface The groundwater remained cloudy or turbid to a depth of 69 feet, where the camera revealed that the casing walls had collapsed inward Because the camera could not pass the obstruction, the survey was terminated at this depth No other irregularities in the casing were noted above this depth A video tape was made of the survey, and copies were provided to PHS/EHD and Teresi Trucking 3.2 Drilling and Sampling Five borings were drilled by V & W Drilling of Rio Vista, California, under contract to Upgradient Environmental V& W used a Longyear drilling ng equipped with 8-inch diameter augers The augers were steam-cleaned between bonngs, and drill cuttings were added to the soil stockpile on the south side of the tank excavation A split-spoon sampler loaded with brass sample sleeves and a 2 5-foot-long core barrel were used to sample the borings The sampling equipment was washed in a TSP solution and rinsed between samples A portable photo-ionization detector (Microtip model HL-2000) was used to screen the samples for the presence of volatile organic vapors and a hand lens was used to observe the gram size and composition of the soil particles Boring logs were prepared for all borings, and these and other observations were recorded on the logs, which are included in Appendix A Selected sample sleeves were covered with Teflon sheets, capped with plastic end caps, and preserved in a cooled ice chest for later laboratory analysis The first boring was drilled on February 12 Discrete samples were collected with the split-spoon sampler at depths of 5, 10, and 15 feet The boring was continuously cored from 20 feet to 60 feet, where saturated conditions were encountered, and discrete samples were then collected at 65 and 70 feet 3