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This site has contaminated groundwater from a leaking underground fuel tank (LUFT). This site cannot impact the subject property with groundwater contamination since it is dwngradient with respect to groundwater flow. Groundwater Lines of Equal Depth and Equal Elevation Maps (1999) found in Appendix F illustrate groundwater depth to be 70 feet and the flow to be northwest. 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. The map found in Appendix D shows the above- referenced Raymond Greer site. The leaking tank to the west of the site can be considered �yJ downgradient, again due to groundwater directional flow. l The third informational gathering method source is the Environmental Questionnaire found / in Appendix C. This documents environmental information directly from the people most l 3'/ knowledgeable about site, namely Mr. and Mrs. Frost, who were also interviewed for completion of this Report. § 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 an above ground gasoline storage tank that 3'J the former owners (Turpin)had on the property. When the Frost's bought the property,the tank was present, but empty with no spillage under the tank. They removed the tank within one year after purchasing the property. Below ground contamination of the underlying aquifers from this point source from any spillage that may have occurred can be considered extremely remote. An existing septic tank serves the SFR. Ultimately, there could be four septic tanks and leachfields on the entire property acreage of-21 acres, which can be considered a very low density with respect to potential nitrate impact. `°`' Us.Fk� § 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, the fertilizer ammonium sulfate is applied to the pasture land grasses. This material supplies nitrogen in the form of ammonium and sulfur. The rate applied is 100 units, or 100 pounds per acre. This is a minimal amount since pasture grasses typically require more than 300 pounds of nitrogen per acre per growing season. No pesticides are applied to the property; however, surrounding properties may be 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 human health and the environment. There are currently /) three large and one small electrical transformers on the property; adjacent to Lone Tree Road. They all appear to be relatively new, and consequently unlikely to contain polychloride 3 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. Page -4- Chesney Consulting