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LE'iIl`IF;IC.F:E,f•1.EI. LEVINE-FRIC,KE LF 1347 October 28 , 1988 REvIBED SAMPLING1 AND ANALYSIS FLAN TASKS 5 AND 6 OF WORK ORDER NO. 1, OCTOBER 11, 1988 DRUPE BROOKSIDE DEVELOPMENT SITE STOCKTON, CALIFORNIA INTRODUCTION At the request of the Grupe company, Levine-Fricke prepared a proposal for conducting an Environmental Site Assessmeber 11, nt of the subject property, Work order 8 . Based on preliminary findings from Tasks 1, 2 and 3 of our Work Order No. 1, Levine-Fricke has made minor modifications to the proposed sampling and analysis plan for the Stockton site. The modified plan is summarized below. The Stockton site (the Site) consists of approximately 1, 200 acres (850 acres currently owned by Grupe Company) of agricul- tural land, located to the north and south of Brookside Road in an unincorporated area of San Joaquin County, just outside the City of Stockton border (Figure 1) . The Site is bounded to the north by Fourteen Mile Slough, to the south by the Calaveras and San Joaquin Rivers, to the west by Ten Mile Slough, and to the east by the Stockton town line. The entire Site is bounded by levees. Ground water a2 . 5the toSite feethas orreportedly belowbeen theencountered at depths ranging from surface. In addition to the farmed fields, which cover most of the Site, the Site contains three areas where present or past activities may potentially have resulted in the release of chemicals into the subsurfaces of the Site (Figures 2 , 3 , and 4) . This finding is based upon our preliminary evaluation of the site as described in our Work Order Number 1, Tasks 1.-3 • These areas are (1) a parcel in the eastern portion of the Site, which contains an old milk barn, a second barn connected to a former storage area/shop, and a lo, 000-gallon above ground diesel fuel storage tank; (2) a parcel to the south of the Site, which contains a maintenance shop, storage sheds, and two underground fuel storage tanks; and (3) a parcel in the western portion of the Site, which contains storage sheds and residences. It is our understanding that the underground storage tanks will be removed as a separate task outside the scope of this assessment, and that an evaluation of possible release of materials from the underground storage tanks will be incorporated into the removal process. This latter task is therefore not addressed in this work plan. Due to the limited timeframe for and scope of this project, the specific findings in each of these areas from Tasks 1-3 will not -1-