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GARRIT VAN REIT <br /> DEBOER FAMILY TRUST <br /> PAGE 2 <br /> At the conclusion of the next four quarters of groundwater monitoring, confirmation <br /> soil borings must be installed to determine a more accurate mass volume of <br /> contamination remaining in the soil. Depending on the volume of hydrocarbons found <br /> to be remaining, some degree of fate and transport modeling may be needed to <br /> predict the fate of this contamination on the groundwater resource over time. <br /> In summary, the data to be collected from the wells over the next four quarters and <br /> the results of the confirmation soil borings would have to indicate a substantial impact <br /> to the groundwater resource in order to justify the implementation of this proposal. <br /> The basis of this justification is essentially due to the high cost of remediation versus <br /> the limited additional benefit expected based on available information. <br /> If you have any questions or wish to discuss this letter in more detail, please contact <br /> Linda Turkatte, Senior RENS, at (209) 468-3441. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> Linda A. Turkatte, Senior REHS Diane M. Hi son, REHS <br /> Site Mitigation Unit Supervisor <br /> c: Beth Thayer, CVRWQCB <br /> c: Annabeil Mackey, SWRCB Cleanup Fund Program <br /> c: Lee Delano, WHF Inc. <br />