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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 the Conclusion Section of this report. Since there is no cropland nearby, nitrogen fertilization is extremely unlikely to have contributed nitrogen to the underlying aquifer(s). However, historical, relatively high density septic systems and contemporary lawn fertilization with nitrogen has been shown to contribute nitrogen to groundwater. Although there is currently a small chicken coop onsite, no future agricultural activities will occur on the property that may contribute potential environmental concerns. Activity on nearby properties is inconclusive, particularly to the northwest where a warehouse type structure is located. The property has not been under conventional agricultural cultivation for several decades; therefore, no pesticides and/or fertilizers have been commercially applied. The second source of environmental information was the referenced documents from Environmental Record Search (ERS). These documents reveal environmental information obtained directly from listed public sources. The data indicates no environmental threat to the subject property as indicated on Page 1 and Page 13, under "Potential Areas of Concern/Contamination Summary." There is a no radon potential exceeding the USEPA maximum "acceptable" level of radon at 4 pCi/L. 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 two contaminated sites with a Leaking Underground Storage Tank (LUST). Due to the distances involved, these two sites cannot impact the subject property. § 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 subject property. 2.) Surrounding electrical transformers near the property exhibited no oil leakage observed from the transformers. The predominate wind direction through the region is east-southeast. A "Mapped Air Permit with Potential Dispersion," as illustrated on Page 27 of the ERS document does not affect the property. Page -4- Chesney Consulting