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An electrical transformer exists at the north side of the property. If nearby transformers were7tol leak or explode and contaminate the subject property, it would be the responsibility of the transformer owner(PG&E) to mitigate any environmental contamination. From previous soil suitability and nitrate loading studies and other soil and groundwater investigations in this locale, it is known that it is a possibility tbAdbigh�t ns of nitrate may exist in the underlying shallow water to ill . High nitrate concentrations in the regional groundwater may be due to septic system impact, naturally occurring nitrate and/or upgradient agricultural fertilizer inputs. PUBLIC ENVIRONMENTAL RECORD/DATA SOURCES It is anticipated that static groundwater is found approximately 60 feet or less under the property. This is based upon groundi s done in the locale of the subject property, specifically on Grant Line Road. The groundwater elevation was foun to be 10 eet a ow grade at the 50-foot M L contour line on Grant Line Road, thus making the groundwater elevation 40 feet MSL. The subject property well is at approximately 100 feet MSL. The 1999 Lines of Equal Depth to Groundwater and the 1999 Lines of Equal Elevation of Groundwater maps do not illustrate the depth and elevation to groundwater in this area since it is extremely variable. As noted on the USGS GeaTracker Map, the ground surface elevation has a declination to the northeast. Groundwater typically travels with the topography of the land surface; consequently, it may be assumed the groundwater is moving in a northeast direction. A groundwater depth of 60 feet can be considered a medium-to-deep groundwater elevation which may be impacted from point source hazardous materials releases, agrichemicals such as pesticides/ herbicides,or nitrates from fertilizers or septic systems. The degree of impact from adverse constituents may be mitigated when there are intervening layers of clay soil or hardpan down to the static water table depth. It is known that clay surface soils and clay strata do exist under the surface soils in this area that may impede upgradient agrichemical impact. There are no records of underground storage tanks (USTs) at the subject property address. This is illustrated on the attached GeoTracker Site Map, wht shows only one Underground Storage Tank and no Leaking Underground Storage Tanks (LUSTS) tanks near the site. The closest UST is located on Diablo Court, approximates 750 feet to the northeas.slof thepreperty.-Therefore, as discu dess�aUove,thethgrogradient most likely is in a northeast direction, thus making this UST downgradient from the site. LUST sites are shown approximately 1.5 miles to the east and northeast of the property and can be considered crossgradient and downgradient to the site and highly unlikely to impact the subject property. Review of the EHD LOP/NON LOP Sites List indicates no sites within a one mile radius to the property. Potential environmental impacts from past,present or future facilities within a one mile radius is own at s time, qt e . Pae -3- Chesney Consulting