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19 September 2002 AGE -NC Project No. 99-0557 Page 2 of 4 MW -1 and MW -2 and that a Phase I Environmental Site Assessment be performed to evaluate the possibility of other on-site or off-site sources of the ground water contamination. Ground water in the Manteca area traditionally ranges from northeast to northwest; ground water monitoring performed on the subject property on 28 May 2002 by Kleinfelder, Inc. showed a flow direction to the northwest and a depth to ground water of approximately 21 feet from the top of the well casing. SUBJECT PROPERTY The following information was found from aerial photograph and topographic map review and a file review at the San Joaquin County Assessor's Office (SJCAO): The building permit for the subject property, #12506, was issued on 16 December 1958 for a "garage and auto showroom". The SJCAO files show the first assessment year as 1959; there were no assessments for previous buildings or uses. A 1963 aerial photograph shows the subject property with roughly the same building configuration as present. Review of SJCAO records noted the presence of hydraulic lifts and two 550 -gallon underground storage tanks (USTs), one for gasoline and one for waste oil; no unknown items of environmental concern were noted in the file review. The Environmental Data Resources (EDR) governmental database search report listed the property on informational databases for the transport and storage of hazardous materials, but no on databases indicating environmental concern. The property was listed on the CA -FID and UST databases as an underground storage tank location, on the HAZMAT database for the transfer and disposal of oxygenated solvents (acetone, butanol, ethyl acetate, etc.) and on the RCRIS-SQG as a small quantity generator of hazardous materials, with no violations found. SURROUNDING PROPERTIES The following information was found from governmental database listings for the subject property area generated by Environmental Data Resources, Inc. (EDR) in January 1999, a July 2002, evaluation of the San Joaquin County Environmental Health Department (SJC-EHD) UST Site mitigation database listing dated April 2001, and internet research on the California Regional Water Quality Control Board Geotracker system (http://geotracker2.arsenaultlegg.com). The Geotracker system was created as a central repository to track all UST and LUFT sites in the state of California. Advanced GeoEnvironmental, Inc.