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26 July 2001 AGE-NC Project No.01-0852 Page I I of 22 1 two approximately 5,000-gallon tanks of caustic soda and one 10,000-gallon tank containing approximately 4,000 gallons of benzene; many of the other approximately 90 containers contained sulfuric acid and various petroleum products and appeared to be leaking or deteriorating(Photos 3 and 4). • In July 1996,DTSC provided onsite cleanup through testing and 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. The DTSC reportedly tested areas of spillage at the property; however, testing at the site could not be verified by AGE. AGE contacted Mr. Arnie ,Sargent of DTSC's Emergency Response Division, who oversaw the emergency cleanup at the site. Mr. Sargent stated that: 1) no soil sampling was done at the site; the DTSC was only to perform emergency removal of the approximately 2,700 gallons of benzene and caustic soda;and 2)drums and other material on-site were not removed because "these materials were not under the interpretation of emergency removal." Mr. Sargent also stated that benzene was found in the piping associated with the tank.Mr. Sargent could not confirm nor deny if additional hazardous substances were present or spilled on the site during { the DTSC emergency removal of the hazardous or potentially hazardous materials. • Several photo graphs ofthe subject property taken by PHS-EHD in 1997 showed the presence J of additional tanks,their usage uncertain,that are no longer present on the property(Photos 5 and 6). At least one tank appears to have a secondary containment system around it(see 14i Photo 6); its Iocation cannot be determined from the photograph. • The property was sold via taut sale in 1998. In April 1999, the new owner retained Bovee Environmental Management (1999) to assess and remove all asbestos-containing material identified in on-site buildings of the subject property. f In August 1999, one 500-gallon gasoline TAT was removed and a bunker oil vault was closed-in-place.According to summary letters prepared by GeoMat Engineering,Inc.(1999) 7 and CKY Incorported(2000),no subsurface contamination was detected from the bunker oil vault;however,a small amount of gasoline(690 milligrams/kilogram)was detected,in a soil sample collected beneath the 500-gallon UST.The former tank area was subsequently over- excavated. Petroleum hydrocarbons were not detected in soil samples collected from the - floor of the excavated area. The property is currently listed as an active LUST site and will not be considered mitigated until the PHS-EHD receives a Closure Summary Report(CSR)documenting the extent of contamination and the remediation work completed at the site. Copper Enterprises has retained AGE to prepare a CSR. 4.2. COMPUTER DATABASE RECORD SEARCH OF.SURROUNDING AREA v A computer search of federal, state and regional regulatory agency data bases was performed by :j Environmental Data Resources Inc. (EDR), a data retrieval company, to identify and locate J