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Scannavino Property Page 14 of 16 Our Project Number: LES080581 November 2S, 2008 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. ",Two contain rs of fluid were observed near the well. If water wells are not properly operated ,-and m coed, 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; however, all containers of fluids should be removed and no longer stored near the wells. BecaJee no staining tNas observed in the vicinity of the transformers, the transformers are not consYlexe� arr�vironmental threat to the subject property at this time. Should the property owners or the EHD be concerned about PCB contamination from the transformers, PG&E should be contacted to test, retrofit, or replace the transformer. Lead-based paints and asbestos-containing materials are not considered environmental issues unless the structure is planned for demolition or renovation. A monitoring well (MW-2) is located on the subject property to measure Cherokee Freight Lines effluent waste water applications to the property. According to the urrent report available�the,,time of the file review, nitrate as N was detected at 24.7 mg/I, w II above the MCL of 10 g/ml. ) Surrounding properties to the north, south and east of the property are also used as a land application area for CFL. Two additional monitoring wells are located on the east and south adjacent properties. MW-1 which is located on the adjacent property east of the subject property exceeded the allowable limits of nitrate as N. The address of 5279 N. Cherokee Lane, located within one-quarter mile of the subject property, was identified on the LOP/Non LOP and EHD Site Mitigation lists; however, the file for this case could not be found for review. Nothing is known at this time regarding the nature of contamination at this facility, and it is possible that the subject property could be affected. 5.0 CONCLUSIONS AND RECOMMENDATIONS Given the historical uses of agricultural chemicals on the subject property, and discharge of effluent water to the subject property, meaningful conclusions regarding the presence or extent of various constituents cannot be determined without soil sampling and analysis. Such sampling and analysis is especially warranted in the conversion of the land into residential use. 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 and effluent discharge to the property and vicinity. Water containing nitrate above the MCL should not be used for drinking water purposes. 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 02008 Neil O.Anderson&Associales,Inc.