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LEVI N E•FRICKE <br /> To supplement soil data collected by TTI at the Site, Sunboro <br /> retained Levine•Fricke to conduct a limited soil-quality <br /> investigation. This investigation consisted of drilling and <br /> sampling 13 soil borings along the northern boundary of the <br /> Site near Byron Road in January 1989 at the approximate <br /> locations shown in Figure 2 . The petroleum compounds found in <br /> three of the thirteen soil borings were chemically <br /> characterized to be similar to a Bunker C fuel and a Diesel #2 <br /> fuel. The methods used and results obtained by the <br /> investigation are presented in our report entitled <br /> "Soil-Quality Investigation, Sunboro Development Corporation <br /> Parcel B, Tracy, California, " dated September 5, 1989. <br /> Sunboro also retained Levine•Fricke to conduct a ground-water <br /> quality investigation to evaluate whether site ground water <br /> had been significantly contaminated by petroleum hydrocarbons <br /> in soil near Byron Road. This investigation consisted of the <br /> drilling and installation of four 'shallow ground-water <br /> monitoring wells (Figure 2) . The results of the investigation <br /> are presented in the Levine•Fricke report entitled "Report on <br /> Ground-water Quality Investigation, Sunboro Development <br /> Corporation Parcel B, Tracy, California, " dated July 27 , 1990. <br /> The field and laboratory results of the ground water <br /> investigation indicated that petroleum-affected soils along <br /> Byron Road apparently have not significantly impacted site <br /> ground-water quality at a distance of about 60 to 200 feet <br /> south of Byron Road. <br /> METHODS OF INVESTIGATION <br /> To achieve the objective of this Scope of Work, the volume of <br /> petroleum-affected soils will be further defined, the <br /> biotreatability of the petroleum-affected soils will be <br /> evaluated, and various slurry wall alternatives will be <br /> considered to determine which will best serve as a barrier to <br /> further migration of petroleum hydrocarbons on site. The <br /> tasks included in the investigation are listed below: <br /> Task 1: Further Definition of the Extent of <br /> Petroleum-Affected Soils <br /> Task 2 : Laboratory Biotreatability Studies <br /> Task 3 : Preliminary Evaluation of Slurry Wall Barriers <br /> Task 4 : Project Management and Meetings <br /> Task 5: Data Evaluation and Report Preparation <br /> These tasks are described in detail below. <br /> .. 2 _'� <br />