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1.0 INTRODUCTION <br /> On behalf of the Stockton Metropolitan Airport, Chevron Products Company,ny, and XG, Sp no <br /> Companies, Rarnage Environmental,,Inc, has prepared this Work Plan, RemedialFeasibility <br /> Testing and Groundwater Monitoring Report, First Qurtter 2009 for submittal to the San Joaquin <br /> County Environmental Health Department (EHD) and the Central Valley regionalNater Quality <br /> Control Board tr o t. On December 10,, 2008, EHD requested that remedial feasibility testing <br /> be initiated at the site. <br /> 11 Site Location n a crl t o <br /> The site is an inactive aviation fuel farm located on the northwest corner of the intersection of C.E. <br /> Dixon Street and Lockheed Court within the Stockton Metropolitan Airport property in San Joaquin <br /> County, California (Figure re 1). A total of 20 underground storage tanks (UST) have been removed <br /> from the site. The locations of the former USTs are shown on Figure 2, and a list of the former <br /> tanks is included as Table 1. <br /> 1.2 Previous Work <br /> 1.2.1 USS"Removals <br /> Between August 1987 and May 1990, sixteen (13) USTs were removed from the site. `twelve of <br /> the US (Tanks 1-12) were 25,000 gallon capacity tanks for the storage of aviation gasoline and <br /> jet fuel, and were anchored to d concrete slab of a depth of approximately 16 feet below ground <br /> surface e bg One of the t1S (Tank 13)was a 12,000 gallon tank<used to store unleaded <br /> gasoline. Three of the UST (Tanks 21, 22, and 3 were 1,000 gallon tanks used to store <br /> aviation gasoline and jet fuel. Soil samples collected from beneath the former USTs indicated that <br /> the sail beneath the fuel farm had been impacted by petroleum hydrocarbons. The soil sample <br /> analytical results are summarized in Table 2. <br /> On Jane 19, 1997, RAH Environmental t l removed the four remaining USTs (TanksCA-1, -2, <br /> CSA-3, and Tank 14). Soil samples collected from beneath these USTs also contained petroleum <br /> hydrocarbons. These sail sample analytical results are also summarized in 'Toby 2. <br /> 1,2.2 Prelimina Investigation and Eyaluafion <br /> On March 26, 1096, IT Corporation published Site Investigation Report, which documented the <br /> results of soil and groundwater-grab sampling from two can-site C eoprobe soil borings (S13-3 and <br /> SB-4). "wo additional soil borings (SB-1 and SB-2) were terminated at the buried concrete slab <br /> beneath the former USTs, The boring locations are shown on Figure 2. <br /> 4 <br />