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F-88224 Page 2 <br /> locations are presented on the attached site plan. The number and <br /> locations of the proposed borings may vary slightly depending on the <br /> conditions observed at the site during the site reconnaissance planned <br /> for the week of June 27, 1988. Representative soil samples will be <br /> obtained at selected depths and monitored for organic vapors using an <br /> H-Nu photoionization detector. Based on our field observations, <br /> selected soil samples will be submitted to EPA-Multitech Laboratories <br /> for chemical analyses. Also, during our exploration, we will acquire a <br /> water sample from an existing monitoring well which is located at the <br /> site. Previous analyses of water samples from this well have indicated <br /> no hydrocarbon presence. <br /> SITE CONDITIONS <br /> The site of the proposed assessment is located in Township 1 <br /> North, Range 6 East, Section 8 (Mount Diablo Base and Meridian) in <br /> Stockton, San Joaquin County, California. The Assessor Parcel Number is <br /> recorded as 161-030-02. <br /> The property is situated along the southern bank of the San <br /> Joaquin River, on the eastern portion of Rough and Ready Island. <br /> Elevations at the site range from approximately 8 to 13 feet above mean <br /> sea level (U.S.G.S. datum) . Drainage at the site is predominantly by <br /> sheet wash to the south. <br /> The site is vacant and undeveloped. Existing on-site structures <br /> consist of a ground water monitoring well (MW-19) and an abandoned power <br /> pole, the locations of which are shown on the site plan. The well was <br />