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The second source of information used was the Geotracker System maintained by the State Water Resources Control Board. This System illustrates all underground fuel storage tanks and leaking underground storage tanks (UST). The leaking USTs to the northeast of the site can be considered upgradient due to groundwater directional flow; however, they are over l� two miles to the northeast, and too far away to impact the property. The third informational gathering method source is the Environmental Questionnaire found �3 in Appendix C. This documents environmental information directly from the people most knowledgeable about site, namely Mr. Bucher, who were also interviewed for completion of this Report. In addition, direct observation of the entire property was completed. § 3.2 Description of all past on-site potential and/or known above and below ground sources of contamination identified at the project site include the observation of existing septic tanks that serves the two SFRs. Ultimately, there could be eight septic tanks and leachfields on the entire property acreage of-18 acres, which can be considered a low density with respect to potential nitrate impact. § 3.3 Description of all current on-site potential and/or known above ground and below ground sources of contamination identified at the project site include the following: As noted on the Environmental Questionnaire, a fertilizer mix is applied to the current crop of tomatoes. The rate applied is 40 gals/acre or 320 units, or 320 pounds per acre, which is acceptable for a fertilizer mix of essential nutrients. A check valve and manual gate valve exists on a flexible hose coming off the irrigation well discharge pipe. Pesticides are applied to the property as noted below and surrounding properties are sprayed. Environmental fate data for many new agrichemical formulations show half lives of these materials to be comparatively short and moderately persistent within the soil environment. Therefore, they pose a minor risk to 0 human health and the environment. There are currently electrical transformers near the property, adjacent to Tokay Colony and Live Oak Roads. They all appear to be relatively new, and consequently unlikely to contain polychloride biphenyls (PCBs). Although no indication was noted of external oil leakage, if there was a leak or explosion, it would be the responsibility of the transformer owner to mitigate environmental contamination. The science of pesticide residues in soil, air, surface water and groundwater is extremely complex and variable. Environmental models that attempt to predict pesticide behavior and transport in the environment are beyond the scope of this investigation. Pesticides with long half-lives that may have been used or drifted onto the property decades ago,primarily DDT, t. may be of an extremely slight concern. DDT was used extensively throughout the agricultural fields of the San Joaquin Valley and degradates of DDT can be found in nearly all these soils. Previous Exposure Assessments made on typical San Joaquin Valley soils suggest an extremely low probability of adverse health effects from soil DDT/DDD and DDE concentrations, if they even exist,based upon the following environmental fate data: Page -4- Chesney Consulting