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*../ To detect these types of underground artifacts is difficult even with the use of ground penetrating radar or other types of non-intrusive, subsurface analyses. Given that the property was deep- ripped in 1994 before planting the existing vineyard, shallow buried containers would have in all probability, been uncovered. Mr. Lange has no recollection of any unusual discovery during this ripping procedure. The land surface did not exhibit visual indicators for buried containers such as surfacing of product residue, soil mounding, or soil depressions. It is usually only after a contaminant plume 4 has impacted a domestic well that buried pesticide containers are discovered. If buried items are discovered during underground utility placements, etc. on the new parcels, the Environmental Health Department must be contacted immediately. An electrical transformer is found at the south end of the property. It appears to be new so it probably does not contain polychloride biphenyl (PCB) laden oil. If this transformer were to leak or explode, it would be the responsibility of the transformer owner(PG&E) to mitigate any environmental contamination. From previous Nitrate Loading and Soil Suitability Studies done to the northwest, it is known that there is a low concentration of nitrate in1he-wderlying drinking This can be attributed to the comparatively dee static ground, y an har pan.down t�te _ .saturatio . PUBLIC ENVIRONMENTAL RECORD/DATA SOURCES Static groundwater is found approximately 160 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 west-southwest. A groundwater depth of 160 feet can be considered a deep groundwater elevation which cannot be easily impacted from serious point source releases and 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, which is demonstrated on the attached well logs from wells in proximity to the property. Based upon the State Water Resources Control Board - GeoTracker System, there are no records of above ground, or under ground (AST/UST) storage tanks near the subject property address. This is illustrated on the attached GeoTracker Site Map, which shows no tanks near the site. There are two leaking underground fuel tanks located near the town of Lockeford. These sites can be considered downgradient (with respect to groundwater flow) and unable to impact the property. Potential environmental impacts from past, present or future facilities within a one mile radius is unknown at this time, but unlikely. Records at EHD indicate that there are no hazardous materials sites adjacent or in proximity to the property. The closest E5 sitee xs tTie Rott property, located north of the subject property at 22282 Clements Road. An exempt tank facility is located at this address. This site can be considered cross-gradient to the property and unable to impact it. Pa e -3- Chesney Consulting