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I. H. KLEINI~RDER & ASSOCIATES = a� t ff . 3 SOIL ASSSSSl�IZ `fl To assess the presence of petroleum hydrocarbons in°the unsaturated.soil. �)�? and map the extent of contamination,• -soil, samples were collected, for. chemical analyses and lithologic logging. - k total of- 44 soil samples have been collected from 15 of 16 soil borings drilled in the immediate vicinity of the fuel oil storage tank. .1 SOIL SAMPLES As part of the initial Phase. 1 investigation conducted on November 3, 1986, five soil samples were collected, at select intervals from soil I ' borings B-1 and B-3. No soil samples or lithologic information was ilii! li gathered from soil boring B-2 because of a water pipe encountered at approximately 3 feet below the ground surface. 'i II ` In . the Phase 2 investigation, 39 soil samples were collected from 13 soil bora � if borings: (B-4 through B16). Soil samples were collected at 5-foot ,! intervals starting at a depth of 5 feet below theground surface down to iI the depth where ground water was first encountered. The low permeability !!ijjll . of the clay encountered in the soil borings resulted in low ground water { "recharge rates and made it difficult to locate the to of the � p ground water table. As a result some of the soil samples were collected below the x water table. The depth of soil borings. r ng ranged from 14.5 to 21,.5 feet. The soil borings were placed along six radial lines originating from the 11 ng e i tank location. If the presence of petroleum hydrocarbons was indicated (based on field screening and observations) in samples collected from the initial soil boring on each radial line, the next soil boring was drilled approximately 20 feet further away from the tank. Soil samples were collected from soil borings advanced ala I ng each radial line until a boring was drilled in which petroleum hydrocarbons did not appear to be present l 38-87-51 5