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• In 1985 the business was purchased by Mike and John Telfer and renamed Western <br /> Oil and Spreading, Inc The company is currently operating as a liquid asphalt and <br /> lignin road oil distribution business On October 22, 1987, several UST's were removed <br /> ' from the site property Analysis of soil collected at the time of tank removal indicated <br /> petroleum impacted soils within the 20,000 GA tank cavity It is not known when or for <br /> ' how long since 1955 the contamination occurred Excavated areas were backfilled with <br /> presumed clean material to original surface grade The site continues to be operated as <br /> a road oil distribution terminal <br /> ' 2 1.2 Preliminary Investigation and Evaluation Report <br /> Site history, soil lithology, soil petroleum hydrocarbon and water petroleum <br /> hydrocarbon contamination findings have been reviewed from the previous work by <br /> Gallardo, Stellar Environmental Solutions and D K Barber and Associates Please <br /> reference summary found in this report's Table 1 Use history and soil contamination <br /> findings formed the basis for the proposed excavation of soil contaminated beyond <br /> acceptable limits The soil mantle was found to be generally a sandy clay or sandy silt <br /> with moderate permeability and first encountered ground water at 52 FT bgs During <br /> the rainy season there may be some perched water in the top several FT of the mantle <br /> ' This zone is composed of gravels and backfilled aggregate materials with some areas <br /> of diesel/asphalt coating of the aggregate The uppermost strata is compacted <br /> ' aggregate road base with the surface "sealed" with a non structural asphalt surface <br /> treatment may be 0 1 FT thick in some places Some perched water has been found <br /> between 15 FT and 20 FT bgs in the general site area Contamination of the water <br /> saturated zone (measured as ground water) of less than 1 ppm of diesel type <br /> hydrocarbons has been indicated in the monitoring wells MW-2 and MW-6 sampling <br /> between December 2000 and the present Additionally, MW-1 has indicated between <br /> 2 3 mglltr and 1 2 mglltr of diesel in the water <br /> 2-2 <br /> 1 10 <br /> I <br />