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Environmental Compliance Consulting <br /> OVERVIEW <br /> Three underground tanks were removed; one 1000 gallon gasoline tank in April, <br /> and two diesel tanks (one 5000 gallon capacity, the other 10,000 gallon cap.) <br /> removed in June. The diesel tanks Showed absolutely no evidence of perimeter <br /> SOU contamination. The gasoline tank soil showed positive on the north (fill) <br /> end only from two 'separate' laboratories. This soil from the gas tank <br /> excavation is spread on and covered by 'poly'sheeting on the far east border <br /> Of the property, it's total volume approximately 10 yd0. <br /> This original stockpile of soil and all existing excavations and piles were <br /> again sampled by Greg Reed of Universal Engineering (witnessed by Darlene Reuss] <br /> on 10 January 1990 and transported to Precision Analytical. Lab in Richmond. <br /> The maximum contamination from all, areas was indicated in the 'original' <br /> soil stockpile where gasoline showed 90 mg/kg and diesel at 190 rig/kg, <br /> -y This evident cross-contamination of diesel ill the original stockpile most <br /> likely resulted from the 'front end' loader which transferred the soil from <br /> the excavation to the stockpile. <br /> RaIEDIATION PROCEDURES <br /> Al'permit to aerate has been applied for to the San Joaquin County Air Pollution <br /> Control District. The soil will be spread on 'poly sheeting' and turned <br /> daily , as weather permits. The covered soil, in the interim will be subject <br /> to normal soli bacteria and fungi which break down the larger(12 to 14 carbon <br /> chains) semivolatile fragments of diesel. The soil will be resampled and <br /> analyzed as necessary until contaminant levels are below action limits. <br /> Resampling will occur after notification to San Joaquin County Environmental <br /> Health Department, There is not presently, nor has there been <br /> any-immiiii ent--da riger-to groundwater. _...__. __-- <br /> Groundwater was not present during a1.1 <br /> excavation procedures and all contaminated soils removed are on and covered <br /> with impermeable poly sheeting. <br /> Page 3 <br />