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1 <br /> INITIAL SITE CHARACTERIZATION REPORT <br /> ' of the <br /> DIESEL ABOVE GROUND STORAGE TANK FUEL SPILL <br /> at the <br /> DEREMO #2 MINE SITE <br /> located near <br /> DOVE CREEK, COLORADO <br /> ' EXECUTIVE SUMMARV <br /> ' Umetco Minerals Corporation (Umetco) contracted Tellco Environmental (Tellco) to investigate a fuel <br /> spill, which leaked from a diesel above-ground storage tank(s) (AST) at the subject site, and to collect <br /> ' data necessary to prepare an Initial Site Characterization Report (ISCR), in accordance with the <br /> Colorado Department of Labor and Employment, Oil Inspection Section document: "Storage Tank- <br /> Facility Owner/Operator Guidance Documents, July 1, 1995". A site investigation was performed on <br /> August 27, 1997, and included exploratory excavations (trenches), Photo Ionization Detector (PID) <br /> ' soil-vapor measurement observations at numerous points, and the collection of samples from twenty- <br /> four(24) sampling locations. <br /> ' Direct PID measurements taken at various locations (using a Photovac Model 2000) were used to plan <br /> the subsequent soil sampling locations. Observed PID measurements of soil-vapor -anged from 0 to <br /> 900 parts per million (ppm). Laboratory analysis of soil samples measured total Benzene. Toluene, <br /> Ethylbenzene, and Xylene (BTEX) levels ranging from no-detect to 9.4 mg/Kg; and measured Total <br /> Extractable Petroleum Hydrocarbons (TEPH) levels ranging from no-detect to 25,000 mg/Kg. No <br /> ' benzene was detected in the laboratory analysis of any of the soil samples. <br /> i <br />