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In addition, it is well documented that the Coastal Mountain Range contributes nitrate to the underlying aquifers through geological formations. Groundwater nitrate contamination from the septic systems in this locale is highly unlikely due to the extremely low density of surrounding systems. Future agricultural activities will occur on the property and surrounding properties that may contribute potential nitrate environmental concerns. It is unknown, but assumed, that the farmer farming the subject property is a member of the San Joaquin County and Delta Irrigated Lands Regulatory Program Coalition. The Coalition assists with formulating accurate nitrogen fertilization programs. Fertilizers are injected into the irrigation system. A backflow prevention device is located on the irrigation system. Pesticide applications must be done under the recommendations of a licensed agricultural Pest Control Advisor(PCA), which are heavily regulated. 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 nearest Leaking Underground Storage Tank (LUST) contaminated site to the east of the property has a clean-up status of complete and the case is closed. The other site to the south of the property pertains to a well water sample completed under the Irrigated Lands Regulatory Program. Groundwater gradient flow is generally regarded to be in a northeast direction. There is no upgradient referenced contaminated sites. 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 as illustrated in Appendix E. The predominate wind direction through the region is to the east-southeast. West-northwest, or upgradient wind shed comes through the Altamont Pass. Although DDT was banned in 1972, its presence in San Joaquin Valley soils is an indication of its long half-life. It is extremely unlikely there are any concentrations of DDT or its degradates in the property soils from farming operations that may have taken place on the property decades ago. Any minute residual pesticide concentrations are inconsequential. Page -4 _J - Chesney Consulting