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August 26, 1987 AGS 87053-1 <br /> Reynolds and Brown, Tracy, California �= <br /> E <br /> Tank Ti was found to have no throughgoing holes or unusual <br /> 4 <br /> corrosion. Tank T2 was found to have a hole approximately 0.75 ~. 3 <br /> k <br /> inches in diameter at the base of the tank near the east end. r: <br /> i <br /> This location is directly below the fill port, and may be due to <br /> E <br /> corrosion or wear associated with sticking the tank. Tank T2 <br /> showed some evidence of corrosion near the base of the tank, <br /> apparently associated with contact with ground. <br /> i <br /> Native soil was removed from the tank cavity with a backhoe for <br /> sampling. Soil samples were collected from an approximate depth 1 ` <br /> of 14 feet, or 2 feet below the base of the tanks, and near the <br /> east and west ends of each of the tanks. Additional samples were <br /> collected .from the side walls of the tank cavity, but were not' <br /> analyzed. The native soil consists of a light brown medium- to <br /> fine-grained sand. No evidence of soil contamination was noted <br /> f <br /> in the samples or elsewhere in the excavation. Iyr <br /> 1 = <br /> The samples were ' collected from the backhoe bucket immediately <br /> after the soil was brought to the surface by driving a <br /> laboratory-cleaned brass sample sleeve into the soil. The sleeve <br /> was sealed with aluminum foil, plastic caps and airtight tape, <br /> and then labeled and placed in iced storage. A Chain-of-Custody <br /> . 3 <br />