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Walker a Main Property Page 7 Our Project Number: E07021A March 15, 2007 Rusty farm equipment was observed on the property. • A leaky 55 gallon drum was located on the property. • Concrete debris was observed on the property. 3.4 Past Off-Site Sources of Contamination _ No above- or below-ground on-site potential or known sources of contamination were identified from current uses of the site, except for the following: The surrounding properties have a history of being used for agricultural purposes. It is Likely that agricultural chemicals were applied. 3.5 Current Off-Site Sources of Contamination No above- or below-ground on-site potential or known sources of contamination were identified from current uses of the site, except for the following: • Surrounding properties are used for agriculture; agricultural chemicals may be applied to these properties. 4.0 EVALUATION OF IDENTIFIED CONTAMINATION SOURCES Agricultural chemical residues may remain on the property. No evidence was found, however, to indicate that the chemicals were applied inappropriately. _ The rusting metal located on the property may leach metals into the surface soils at the site. The above-ground storage tanks are not within a secondary containment area. Any and all Leaks could potentially impact the soil. If water wells are not property operated and maintained, they can serve as contamination conduits to groundwater. Septic systems may be used for inappropriate disposal of hazardous substances. In this case, there is no evidence to suggest that wells or septic systems may be contaminant pathways on the subject property or vicinity. 5.0 CONCLUSIONS AND RECOMMENDATIONS Given the historical uses of agricultural chemicals and petroleum products on the subject property, meaningful conclusions regarding the presence or extent of such material cannot be determined without soil sampling analysis. Such sampling and analysis is especially warranted in the conversion of agricultural land into residential use, as is the case for this property. Should future residents of the subject property be interested in determining the quality of their drinking water, EHD should be contacted for direction regarding the potential for impacts to groundwater from the agricultural history of the property and vicinity. NEIL 0 . ANDERSON AND ASSOCIATES 902 Industrial Way•Lodi, CA 95240 02007 Neil 0. Anderson it Associates, Inc.