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1.0 INTRODUCTION <br />This Tank Removal Summary Report presents results from the underground storage tank <br />(UST) removal at the Naval Communications Station (NCS), Stockton, California. Field activities <br />associated with the UST removal occurred between April 2 and May 18, 1992. The objectives of <br />field activities included removal of tank 81713-2, soil sampling and analysis of the soil in the <br />1 <br />excavation to determine if an unauthorized release had occurred, and tank testing of the remaining <br />two tanks, 81713-1 and 81713-3. The tank designations indicate the building number followed by the <br />tank number in accordance with the station's designations. This summary report is prepared as part <br />of the scope of work described in the Tank Closure Plan dated January 30, 1992, for Contract Task <br />Order No. 0162 awarded to PRC Environmental Management, Inc. (PRC) under the Comprehensive <br />Long -Term Environmental Action Navy (CLEAN) Central Zone Contract No. N6247474 -88-D-5086. <br />1.1 BACKGROUND <br />NCS Stockton is located on Rough and Ready Island approximately miles southwest of the <br />downtown area of Stockton (Figure 1). The Naval Communications Station (and portions of the land <br />adjacent to the island) was developed by the U.S. Navy in 1945 as a major supply depot during <br />World War II and has served as an active military installation since then. In 1965, the supply depot <br />was deactivated and control of the facilities was assigned to the Naval Communications Station. A <br />number of U.S. government agencies currently occupy the warehouse facilities located on, and <br />adjacent to, the island. <br />UST 81713-2) longer in <br />Under the U.S. Navy's abandoned tank program, one (tank no use at <br />NCS Stockton was proposed for closure. Tank 81713-1 and 81713-3 are currently used for storing <br />fuel for have been tested for tightness, reported in <br />unleaded station vehicles and results of which are <br />following sections. <br />1.2 REPORT ORGANIZATION <br />The remainder of this report presents the results of the field activities at NCS Stockton. <br />Section 2.0 presents the site description. Section 3.0 describes the field activities associated with <br />UST removal and testing of remaining tanks and identifies deviations from the Tank Closure Plan, <br />1 <br />