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NO IN o WORK PLAN PRELIMINARY INVESTIGATION OF GROUND WATER PDM STROCAL SITE STOCKTON, CALIFORNIA -. 1.0 INTRODUCTION The PDM Strocal site is located at 2324 Navy Drive, Stockton, California. The site location is also described by Parcel 1 (30 acres), lying within Section 16, Township I North, Range 6 East, Mount Diablo Base Line and Meridian, in the City of Stockton, California (Book 11 of Parcel Maps, Page 32, San Joaquin County Records), The site location is shown on Figure 1. A 10,000-gallon underground diesel fuel storage tank was installed on the _ property in 1981. At that time the property was owned by Western State Steel. In 1987 the property was purchased from Western State Steel by the current owner, Fite Development Company, 9857 Horn Road, Sacramento, California. PDM Strocal, Inc. (PDM Strocal) holds a lease-option-to-buy agreement with Fite Development Company for the property and has conducted f structural steel manufacturing operations at the site since I987. On March 9, 1989, under contract with PDM Strocal, Western Meter Service removed.the 10,000-gallon diesel storage tank from the ground. The tank ' removal was necessary to make room for an addition to the existing plant structure (South Bay Addition). Figure 2 displays the location of the tank excavation, the excavated soil pile, and existing site structures and the South Bay Addition. During the excavation activity, discolored soil with a diesel odor was noted at the west end of the tank, in an area underlying the fo�-::er location of the surface pump installation. A soil sample from s the western sidewall of the excavation confirmed the presence of diesel fuel in the soil, at a level of 350er arts million P P (ppm). As reported in Appendix A of this work plan, this sample showed nondetectable levels of benzene, toluene, xylene, and ethyl benzene (BTXE). - noWeEnvironmental zv.......v..,.... ...: y dal[ ... ..