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In addition, Kleinfelder recommends that a complete priority pollutant analyses be conducted initially on all newly installed wells. 1 also recommend that this strategy be followed. The analytical suite for both surface and ground water has been expanded to include volatile organic compounds, metals, organochlorine pesticides and PCBs, purgeable petroleum hydrocarbons, extractable petroleum hydrocarbons, and general minerals (common ions). Table 1 lists the analytical methods for soil and groundwater samples. 2) The two monitoring well clusters proposed for the Fire Fighting area (Area 2) are 1,100 and 1,500 feet upgradient (shallow zone) from the existing cluster W-1,2. Well W-1 had benzene @ 1,200 ppb, toluene @ 5,300 ppb, xylene @ 2,800 ppb, and DCE @ X75,000 ppb. Well W-2 had a level of vinyl chloride of 70 ppb. It is unclear what the objectives of these monitoring wells are. Additional monitoring wells, to assess the extent of contamination associated with this area, should be located downgradient from suspected sources and well cluster W-1,2. The emphasis of the interim site investigation is on determining the hydrogeologic characteristics of NCS Stockton. Determination of the extent and source(s) of any contamination is more correctly assigned to the RI/FS. These well clusters are located to provide piezometric data critical to determining the gradient in the intermediate zone. The well clusters in question are also intended to provide ground-water chemistry data at the edge of NCS Stockton property, thus permitting evaluation of the potential for off-site migration of contaminants in general from the island. 3) Ground water contamination exists in the GSA Damaged Container Storage Area. Well W- 3 in this area had levels of PCE, TCE, and cis-1,2 DCE at 8,600, 5,200, and 3,800 ppb respectively. However, no additional monitoring wells are proposed for this area. The workplan should be revised to include the installation of two well clusters in this area, to determine the extent of the contamination detected in monitoring well W-3. The interim site investigation is designed to determine the hydrogeologic characteristics of NCS Stockton. An understanding of the hydrogeology of NCS Stockton is required to provide a framework in which to conduct subsequent RI/FS activities, such as assessing the extent of contaminated ground water at the GSA Damaged Container Storage Area. 4) The assessment of ground water and/or soil contamination at the Battery Acid Disposal site, at the 10 Site 5 Investigation sites, and at specific landfill sites within Area 1, is 7 r