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Department of Toxic Substances Control <br /> <br />Linda S. Adams <br />Secretary for <br />Environmental Protection <br />Maureen F. Gorsen, Director <br />1515 Tollhouse Road <br />Clovis, California 93611 <br />RECEIvet --% iDArnold SGcohvwearnrzoer negger <br />APR 0 9 2007 <br />April 6, 2007 <br />Mr. Kent Reynolds, P.G. <br />Legacy Development, Inc. <br />do The Source Group, Inc. <br />3451-C Vincent Road <br />Pleasant Hill, California 94523 <br />DRAFT PRELIMINARY ENDANGERMENT ASSESSMENT WORKPLAN, STOCKTON <br />99 SPEEDWAY PROJECT, STOCKTON, CALIFORNIA <br />Dear Mr. Reynolds: <br />The Department of Toxic Substances Control (DTSC) has received and reviewed the <br />Draft Preliminary Endangerment Assessment Workplan prepared for the Stockton 99 <br />Speedway project. The Workplan will be implemented to further characterize <br />conditions at the former Stockton Speedway site, including the collection and analysis <br />of soils contaminated with metals, pesticides, petroleum hydrocarbons and VOC's. The <br />site consists of six Areas of Concern (A0C5) that need further characterization: A <br />debris fill area with an unknown amount of contaminated soil, the racetrack area, the <br />grandstand fill area, the retention basin area, parking lot "A" and parking lot "B." The <br />PEA Workplan states that 39 soil borings will initially be performed to determine the <br />extent of contamination for the above AOCs. <br />One item that may need clarification is that Page 3-7 of the report states that the site is <br />currently zoned for mixed use (commercial and industrial) and is expected to remain <br />zoned as such. In previous meetings between DTSC and Legacy Development <br />representatives, it was indicated that the site would be utilized for single family <br />residences, and remediated to residential standards. <br />We concur with the PEA Workplan and look forward to receiving the additional <br />analytical results. A DTSC staff review of previous reports submitted for this site <br />indicates that there are three particular "hot-spots" in the debris fill area that need <br />further characterization. Due to the nature of contamination in the debris fill area, <br />additional sampling may be required. <br />Jn:cm <br />JG05.047