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26 July 2001 AGE-NC Project No.01-0852 Page 21 of 22 e denatured alcohol was to have been stored in a 200,000-gallon and two 16,000-gallon . tanks on the property; the former{?) locations of these tanks are unknown. 1 • A permit to construct an ethanol load-out station (where the finished product would be ,...� loaded aboard tracks)was on file at the RFD;whether the structure was ever constructed M and its location on the subject property is unknown. • A sump is located on the property, approximately 100 feet southwest of the former azeotropic unit. Based on a 1997 PHS-EHD photograph,there maybe an additional sump, located within.50 feet southeast of the distillation tower. • One 500-gallon gasoline UST has been removed and a bunker oil vault has been closed in- Plae; cthe PHS-EHD is awaiting a Closure Summary Report(to be prepared by AGE) prior o siteclosure. However; there were at least two references to a-map drawn.by a former employee which allegedly showed the former (?) location(s) of additional, undocumented UST(s). • A complaint letter from the Mokelumne Fire District to PHS-EHD regarding illegal liquid waste discharge to the surface ponds from the business on the premise around 1993. ;j Unknown leaking materials in an unknown location found after the 1993 fire. • Two approximately 5,000-gallon tanks of caustic soda, one 10,000-gallon tank containing about 4,000 gallons of benzene, and approximately 90 containers containing sulfuric acid, various petroleum products and other hazardous solid wastes that were previously reported to.have leaked.into.the.ground. - dditional tanks,whose usage is unknown,observed in 1997 photographs that are no longer on the roe the former location of one tank on the roe could not be determined. property;rty; property rtY .. • In July 1996, DTSC provided onsite removal of 2,749 gallons of benzene, 410 gallons of waste alkali liquid, 400 gallons of sodium hydroxide and 150 pounds of solid hazardous waste;According to AGE's conversation with Mr.Arnie S argent ofDTSC,the operation was _. just emergency removal;neither soil sampling and testing nor cleanup was performed at the site.Mr. Sargent also mentioned that piping associated with the benzene tank also contained benzene. } s 10.0. LINUTATIONS Our professional services were performed using that degree of care and skill ordinarily exercised by consultants practicing in this or similar fields.The findings were based mainly upon environmental p g . ..� rnment agency lists, on a site exammat�on of historical cords maps, aerial photographs and ove reconnaissance visit, and on information obtained during a personal interview with persons of long term familiarity with the subject property. The hazardous waste site lists represented in this report