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1.0 INTRODUCTION <br /> Two Above Ground Storage Tanks (ASTs), one 20,000 gallons capacity, and one 8,000 gallons <br /> capacity were installed at the D-2 Mine site circa 1975 and were removed circa 1993. Umetco <br /> personnel performing site reclamation first noticed soil vapor odors in the area in August 1997. <br /> The site was characterized and an initial characterization report prepared by Tellco <br /> Environmental (Tellco, 1997) was submitted to the Colorado Department of Public Health and <br /> Environment (CDPHE) in October of 1997. <br /> Umetco has prepared the following plan for the one-time bioremedial treatmentt and on-site <br /> disposal of these petroleum contaminated soils. <br /> 2.0 SITE DESCRIPTION <br /> The subject site is located in the south half of Section 2, Township 42 North, Range :20 West, <br /> NMPM, in San Miguel County, Colorado. The site is on property owned by Larry Deremo, and <br /> reclamation activity at the site is controlled by Colorado Division of Minerals and Geology <br /> permit number M/77/288. <br /> The ground cover material in the area of the fuel spill is bare soil and mine waste spoil. A mine <br /> headframe and hoist house are located approximately 150 feet northwest of the spill area. <br /> There are no known water wells within 500 feet of the spill area. The closest well has a static <br /> water level of 25 feet. The depth to ground water at the site is not known. <br /> Lab analysis, reported on 9/12/97, confirmed total BTEX concentrations ranging from no-detect <br /> to 9.4 mg/kg, and TEPH concentrations ranging from no-detect to 25,000 mg/kg. The estimated <br /> average of the TEPH concentration of the contaminated soils is approximately 6,900 mg/kg. <br /> The extent of contamination is approximately 90 feet wide by 110 feet long, with estimated <br /> depths ranging from 0.5 feet to 3.0 feet below the ground surface (provided that the <br /> contamination does not extend below a sandstone cap rock layer underneath the contaminated <br /> soils). <br /> Refer to the initial site characterization report (Tellco, 1997) for more details. <br /> D-2PETROLEUM CONTAMINATED SOILS <br /> Page 1 <br />