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3.4 Utilities <br />There are no known septic tanks near the tank area. No public <br />underground utilities exist within the plant area (Figure 4). <br />4.0 TANK HISTORY <br />Two fuel tanks existed at the site. Both tanks possessed a <br />capacity of 10,000 gallons each. One tank contained diesel fuels <br />and one contained leaded gasoline. <br />Prior to 1982, the fuel storage consisted of 2-5,000 gallon <br />connected tanks for gasoline storage and a 10,000 gallon diesel <br />stroage tank. In 1982, the connected gasoline storage tank was <br />removed and replaced with a single 10,000 gallon gasoline storage <br />tank. <br />In December 1986, both tanks were integrity tested and inventory <br />reconciliation was initiated. Both tanks tested tight. <br />In December 1987, the diesel tank was emptied of its contents and <br />removed from service. The contents of the tank were transferred <br />to an above ground storage tank. In March 1988, the contents of <br />the gasoline tank were also removed and transfered to an above <br />ground storage tank. These transfers were conducted as the plant <br />was phasing out their underground fuel storage. <br />In May 1988, both tank were again integrity tested. At this time <br />the gasoline tank tested tight and the diesel tank did not test <br />tight. The results for these integrity tests as well as the 1986 <br />integrity tests are contained in Appendix B. The inventory <br />reconciliation records for both tanks were reviewed and no <br />discernible variance trend were observed which would indicate a <br />leak. <br />On May 23, 1988, both tanks were excavated and removed. At the <br />time of removal, one welded seam on the diesel tank had obvious <br />gaps and a plugged upper vent pipe had a hole. The soils <br />underneath each tank were sampled. The locations of these <br />samples are shown on Figure 5. The samples were labeled GST for <br />the soil sample taken beneath the gasoline storage tank and DST <br />for the soil sample gathered beneath the diesel storage tank. <br />The samples were analyzed for the following parameters: <br />o Gasoline Storage Tank (GST) <br />o BTX - EPA Method 8020 <br />o TPH - EPA Method 8015 mod. <br />o Organolead <br />o Diesel Storage Tank (DST) <br />o BTX - EPA Method 8020 <br />o TPH - EPA Method 8015 mod. <br />The analytical results for these samples are contained in Appen- <br />dix A. <br />- 6 - <br />