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Iif <br /> �If <br /> Mr. Martinovich -2- January 25, 1994 <br /> i� <br /> samples were collected by Shewey Environmental staff and delivered <br /> to Del Mar Analytical (a California OTSC certified laboratory) for <br /> analysis. The results of the analyses were 310,. 240, 860, and 350 <br /> mg/kg TPH by EPA 418 . 1 (average of 440 mg/kg TPH) . Following the <br /> collection 'of the baseline soil samples, Bio Convertors, Inc. <br /> applied their liquid mixture (described above) to the contaminated <br /> soil stockpile. The stockpile was then covered with 10-mil plastic <br /> sheeting (the stockpile was also underlain with 10-mil plastic <br /> sheeting) . !� <br /> On December 13 , 1993 , six soil samples were collected from the 50 <br /> cubic yard stockpile by Shewey Environmental staff and delivered to <br /> Del Mar Analytical for analysis. The results of the analyses were <br /> 53 , 5, 34 , 27 , 38 , and 17 mg/kg TPH by EPA 418 .1. On December 14 , <br /> 1993 , one additional soil sample was collected from the bottom of <br /> the stockpile to determine if contaminants had been leached by the <br /> surfactant. IFThis sample had 28 mg/kg TPH by EPA 418 . 1. <br /> . Conclusions!! <br /> Based on the laboratory analytical results of sail samples, the 50 <br /> cubic yardsjlof soil contaminated with motor oil was bioremediated <br /> from starting TPH concentrations averaging 440 mg/kg to TPH <br /> concentrations below 100 mg/kg in 33 days. <br /> I'f <br /> If you havej�any questions on this pilot test, please contact me at <br /> (619) 338-2246. <br /> Sincerely, <br /> JOHN A. MENATTI, Supervising Hazardous Materials Specialist <br /> Environmental Health Services <br /> Site Assessment and Mitigation Division <br /> JAM: jm <br /> cc: Mr. Bio Convertors, Inc. <br /> Mr. Charlie Shewey, Shewey Environmental <br /> 7 <br /> I <br /> �I� <br />