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§ 3.0 IDENTIFICATION OF ALL PAST AND CURRENT SOURCES OF CONTAMINATION §3.1 Discussion of the methods used to research and investigate the potential or known above- ground and/or below ground sources of contamination at the site include the following: The first informational gathering source was direct observation and photographs of the entire property,with observations referenced in this report. Since there is no upgradient cropland nearby, nitrogen fertilization is extremely unlikely to have contributed nitrogen to the underlying aquifer(s). Groundwater Nitrate contamination may have originated from the historical septic system density in this locale. No future agricultural activities will occur on the property, or on nearby properties,that may contribute potential environmental concerns. The property has not been under recent conventional cultivation;therefore, no pesticides, herbicides, and/or fertilizers have been applied. The second source of environmental information was the referenced documents from Environmental Records Search(ERS). These documents reveal environmental information obtained directly from listed public sources. The data indicates no environmental threat to the subject property within a one mile radius. The third informational source is the Geotracker Site List from the State Water Resources Control Board for underground storage tanks (USTs), leaking underground fuel tanks (LUFTs),pipeline spills, and other contaminated sites. The Site List reveals no contaminated sites within a 1000 ft radius of the property. Groundwater gradient flow is generally regarded to be in a northeast direction. There are no upgradient referenced contaminated sites, and any contaminated sites substantially upgradient from the property may be considered too far and extremely unlikely to impact it. However,this does not preclude contaminated groundwater from flowing under the subject property from an unknown source. §3.2 Description of all past on-site potential and/or known above and/or below ground sources of contamination identified on the property include: 1.) There is no record of there being an above ground or underground permitted fuel storage tank(s) (ASTs/USTs)on the property. 2.)There is one electrical transformer on the property with no sign of oil leakage. The predominate wind direction through the region is to the east-southeast. West-northwest, or upgradient wind shed comes through the Altamont Pass and not over agricultural production land. Page -4- Chesney Consulting