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Health Division (PHS-EHD) and San Joaquin County Office of Emergency Services (OES) records produced no further information regarding the locations. Additionally, there are no records on file with PHS-EHD or OES for the Site or its adjoining properties. Pesticide Use Reports provided by the San Joaquin County Agricultural Commissioner's Office revealed that pesticides have been used on the Site for the last five years. An interview with the site manager also indicated the use of pesticides for agricultural purposes at the Site. OPINION No historical recognized environmental conditions were identified for the Site. Condor found one condition at the Site that is considered a recognized environmental condition pursuant to the ASTM Standard: • During the Site reconnaissance, one 500-gallon AST was identified on the Site with some minor soil staining beneath it. Condor identified one de minimis condition at the Site: • During the Site records review and interviews, the past use of agricultural chemicals on the Site was identified. The AST constitutes a recognized environmental condition pursuant to the ASTM Standard. Leakage from the AST containing petroleum products could possibly introduce petroleum hydrocarbon components, including benzene, toluene, ethyl benzene, total xylenes (BTEX), or methyl tertiary butyl ether (MTBE) into the soil. Containment by a relatively small excavation in the area of the AST would likely remove the potentially contaminated soil and could eliminate the recognized environmental condition. Sampling should be performed at the time of excavation to confirm removal of all contaminated material. Proper disposal of the soil should be arranged. The historical application of pesticides to agricultural land at the Site is considered to be a de minimis condition by Condor. Much of the Central Valley was, at one time, used for agricultural use, and hence the presence of pesticide residues is anticipated in the soils. This de minimis condition designation for pesticide use pertains only to areas of the Site on which pesticides have historically been applied for agricultural purposes. Areas of the Site that may have been used for pesticide mixing or locations of higher than average sedimentation rates, such as may exist in association with the bermed structures, may potentially be characterized by residual pesticide concentrations high enough to warrant a recognized environmental condition designation. All opinions expressed herein are based upon the evidence reviewed and the assumptions made during the assessment. CONCLUSIONS Condor has performed a Phase I ESA in conformance with the scope and limitations of ASTM Practice E 1527-00 for 20001, 20043, 20501, and 20601 Mountain House Parkway, Tracy, California. Any exceptions to, or deletions from, this practice are noted in Section 11.0 of this report. This assessment has revealed evidence of one recognized environmental condition in connection with the Site: • One 500-gallon AST was identified on the Site. Concentrations of petroleum hydrocarbon constituents possibly stored in the AST on the Site could affect 1 the groundwater and/or the soil in the area,which could be potentially hazardous to residents. 1 %� I1 CONDOR