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Peter Voskes <br /> Page 2 <br /> In October, 1990, 5 soil borings were drilled and soil samples were <br /> collected to further investigate the extent of contamination from <br /> the former underground storage tank. Mr. Hunter used 60 feet as <br /> the distance from surface to groundwater when he completed the <br /> Environmental Fate Worksheets from the LUFT Manual. The distance <br /> used should have been 45 feet. Boring #1 soil sample results <br /> evidenced benzene at . 024 ppm at 25 feet below ground surface. <br /> Boring ,#2 soil sample results evidenced benzene at .405 ppm at 30 <br /> feet below ground surface boring #5 (located on Hammerstown <br /> property) soil sample results evidenced benzene at . 068 ppm at 25 <br /> feet below ground surface. These levels exceed the amount of <br /> contamination that can be left in place without further <br /> investigation. A copy of these worksheets are enclosed. <br /> Based upon information in Hunter's report, . it appears that the <br /> majority of the contaminated soil -is located on Normac property but <br /> an undetermined amount exists off-site to the west on property <br /> owned by Hammertown Partners. Further investigation of the extent <br /> of contamination is required on-site and off-site which may include <br /> a groundwater investigation. <br /> If you have any further questions ° regarding this matter, contact <br /> Harlin Knoll, REHS, at (209) 468-3442. <br /> Jogi Kh n , M.D. , 1P.H. <br /> Health icer <br /> Laurie ACo lla, REHS, 'Program Manager <br /> nvironmental Health Division <br /> LAC/HK:nr <br /> EMS <br /> c: Hammertown Partners <br /> 11 S. San Joaquin St. , Ste. 400 <br /> Stockton, CA 95202 <br />