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f� z 1 Project No: 310-01.01 March 20, 1990 $ _ Page 2 REX-OVAL OI' EXISTING TRANSMISSION FLUID TANK The 5,000-gallon transmission fluid tank was partially _ buried and was underlain by a concrete slab at approximately six feet below the ground surface. The tank { was excavated and soils were removed to the depth of the F concrete slab underlying the tank; the concrete slab was not removed. The tank was removed from the site and disposed of an scrap metal by Rodger Thomas Transport of ' Loomis, California. Piping from the transmission fluid tank to the loading platform was not removed when the tank s was excavated. f M i The number, location and depth of the soil samples collected, complies with the guidelines established in the x '%r,gional board Staff Recommendations for Initial { Evaluation and Investigation of Underground Tanks, t :;une 2 1988". Two samples were collected by California Water Labs from beneath the tank; one at each end of the ' tank at an elevation approximately two feet below the tank. To obtain samples two additional feet of soil was excavated at each end of the concrete slab underlying the j ! tank. The two samples, T-lE and T-1W, were collected at a depth of `pprcximately eight feet below the ground surface. One sampl , SP-1, was also collected from the spoils stockpile. The spoils stockpile was left on-site and covered with plastic. The .soil samples were analyzed by California Water Labs for i parameters specified within the• "Regional Board Staff Recommendations for initial Evaluation and Investigation of Underground Tanks, June 2, 1988". Analyses included volatile organic compounds according to EPA Method 6020 and high boiling hydrocarbons diesel #2, kerosene :,nd motor oil accerdina to EPA Method 3550. These laboratory methods are 9 described on the enclosed certified analytical report. , FINDINGS Mr. Mike Linzy of Bassett Construction examined the i transmission fluid tank upon removal. The tank did not have any holes and appeared to be intact. 1 Analytical results show that: sample T-1W did not contain any of the chemical constituents for which the soil was s tested. Sample T-1E contained no benzene, toluene, kerosene or motor oil; it did contain 4.9 parts per million (ppm) ethyl benzene, 12 ppm xylenes and 17 ppm diesel 2. . �. Sample SP-1 contained no benzene, kerosene or motor oil, but did contain 0.15 ppm toluene, 0.76 ppm ethyl benzene. s 1.7 ppin xylerses and 34 ppm diescl k2. A summary of all analytical results is presented in Table 1. i �.f i