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Page 7 West Lauffer Road Property February 16,2006 K ` Job No. 2836-001 - - Radon r Our study has not included the testing for radon. Radon is a naturally occurring radioactive gas. Radon results from the natural decay of uranium, The primary route of exposure to radon is via inhalation. The United States Environmental Protection:Agency.(EPA) recommends that individuals avoid long-term exposures to radon concentrations above 4.0 Pico curies per liter(pCi/L). According to the Department of Health Services' Radon Database for California (October 2002), no-households` - were studied within 95690 ZIP Code area. However, the EPA has designated-San Joaquin County as Zone 3. Zone 3 refers to areas where the predicted average indoor radon potential.is less than 2.0 pCi/L. Asbestos The surveying and sampling of potential asbestos-containing materials (ACMs) are outside the scope of this study. The last ban on the manufacture of friable ACM was in 1978; the presence of ACM is generally considered a significant concern in buildings constructed before 1980. The majority of the existing on-site structures were constructed prior to 1975. An asbestos survey of the buildings may be a required prior to demolition or any significant renovation activities. 4r .-. . Lead-Based Paint The Environmental Protection Agency (EPA) considers lead-based paints to be a source of lead exposure to children. Lead-based paint normally becomes a public health issue when painted surfaces (especially in older residential structures) become significantly damaged or deteriorated. The surveying = and sampling of potential lead-based paint has been outside the scope of this study. Utilities T u Natural Gas/Electricity Natural gas and electricity is supplied to the site vicinity by Pacific Gas and Electric(PG&E). Sewage Disposal - There is currently no municipal sewage service connected to the subject site. We understand that the it subject site includes septic systems and associated leach fields within the residential areas. Drinking Water y`There is currently no municipal water service connectionto the subject property. The subject site supports two domestic water wells. We were unable to obtain specific information regarding these wells (such as construction, depth to water, etc.); however, we are not aware of any problems associated with water quality from these wells. If any planned redevelopment of the property does not include the use of these wells,they should be abandoned in accordance with State and County regulations. 4 PRESENT ADJACENT SITE USEfW - The approximate 323-acre property is situated in a historically agricultural area of Thornton, California. The subject site is generally surrounded by vacant farmland. The Mokelumne River corridor borders the property to the west, beyond which farmland was observed. A Royal Energy Company natural ` (d _�