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19 September 2002 AGE -NC Project No. 99-0557 Page 3 of 4 Based on a ground water flow direction range from northeast to northwest, AGE evaluated up - gradient sites ranging from southwest to southeast. An amended EDR map shows the location of the following sites. Data provided by all three sources showed no sites of environmental concern directly upgradient from the subject property; the nearest property, Union/Tosco, 1700 East Yosemite Avenue, was an equi-gradient, closed, soil -only site over 600 feet east of the subject property. This case was opened in 1998 and closed in 1999. The next -closest sites were an equi-gradient, closed aquifer -release LUST site to the west, Frank's Exxon, 1399 East Yosemite Avenue, and a down -gradient site to the northeast, Arco #6020, 1711 East Yosemite Avenue, with two LUST cases on record, one closed soil -only case in 1996 (#1) and one open aquifer -impacted case (#2). Immediate up -gradient property use to the southwest was paved parking areas followed by undeveloped land, property use to the south was undeveloped and property use to the southeast was Highway 99 followed by residential areas. CONCLUSIONS FROM SUBJECT AND SURROUNDING PROPERTY RESEARCH The subject property was used as an auto dealership and garage from 1959 to present; no new information was found concerning additional fueling activities or other areas of environmental concern other than the known hydraulic lifts, USTs and use of the property for auto repair. Based on evaluation of governmental database records, AGE found no up -gradient or immediately surrounding properties of potential environmental concern to the subject property. AGE found no indication that the subject property had been impacted by surrounding properties. GROUND WATER SAMPLING AND ANALYSIS On 13 August 2002 AGE collected ground water samples from the three existing monitoring wells located on the northern portion of the property. AGE purged and sampled wells MW -1, MW -2 and MW -3 according to San Joaquin County Environmental Health Department (SJCEHD) guidelines. The samples were transmitted under chain - of -custody to Cal Tech Environmental Laboratories and analyzed for: Advanced GeoEnv ironmental. Inc.