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FAnelectrical transformer was found on a pole near the domestic well. It appears to be the original probably to serve the chicken coop barn and house. Therefore, it may contain biphenyl (PCB) laden oil. If this transformer were to leak or explode, it would be the y of the transformer owner(P.G. & E)to mitigate any environmental contamination. From previous nitrate loading and soil suitability studies in this locale, it is known that there are typically lower concentrations of nitrate in the underlying drinking water aquifers in comparison to areas of shallower groundwater that may be under agricultural production. Low nitrate concentrations in the area are attributable to the relatively deep groundwater, no agricultural fertilizer inputs and a very low septic system density. PUBLIC ENVIRONMENTAL RECORD/DATA SOURCES Static groundwater is found approximately 130 feet under the property as illustrated on the attached 1999 Lines of Equal Depth to Groundwater map. From the 1999 Lines of Equal Elevation of Groundwater, the groundwater directional flow appears to be toward the east, southeast, although the gradient is considerably flat. A groundwater depth of 130 feet can be considered a deep groundwater elevation which cannot be impacted from serious point source hazardous materials releases, agrichemicals such as pesticides/herbicides, or nitrates from fertilizers. The degree of impact from agrichemicals is particularly mitigated when there are intervening layers of clay or hardpan soil down to the static water table depth. It is known that a hardpan and clay strata exist in this locale. Based upon personal communication with Doug Wilson of the Environmental Health Department, there are no recors o a ove ground, or under ground`(AST/UST) storage tanks at the subject property address. This is also illustrated on the attached GeoTracker Site Map, which shows no Underground Storage Tanks (USTs)or Leaking Underground Storage Tanks (LUSTS) tanks near the site. An Underground Storage Tank(UST) site is shown approximately two miles to the north of the property. This site can be considered crossgradient and virtually impossible to impact the L subject site. Potential environmental impacts from past,present or future facilities within a one tl' mile radius is unknown at this time, but highly unlikely. Two sources of information which attempt to document and define on-site and surrounding past land use were also utilized. The fust is the use of aerial photographs. Aerial photographs of the subject area from 1970 through 1977 found on USDA Soil Maps show the chicken coop barn and the houses on the property. The aerial photo shows that there are no buildings east of this barn. The USDA Soil Map shows the soil to consist of a Redding gravelly loam(#220). Typically, these soil types are well drained with slow permeability. There are sufficient soil "fines" to impede rapid percolation so treatment of effluent can occur before reaching the water table, unlike what would be encountered with a very sandy soil. The second source of information can be found on USGS maps. The property is located within the Peters Quadrangle map, which is found in the Appendix and shows only the chicken coop and house. LNotedon Environmental Questionnaire, is the response to pesticide applications to the property. s have been applied to the property. Therefore, an evaluation of environmental fate data Page -3- Chesnq Consulting