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rs evidenced by the attached photographs, the property contains two#bove grounddiesel storage tanks (ASTs) that provides fuel for the Dairy farm g operation. ng from diesel spillage was observed, as is typical with an agricultural shop operation. age was driven around since there are growing crops within the interiors, to survey for evidence of surface and/or subsurface contamination. No unusual containers were observed,nor was there evidence of solid, or liquid waste disposal. The shop area contains equipment, etc. that is typically observed at almost any agricultural shop facility in the County. The subject property was carefully inspected for environmental concerns originating from discolored, disturbed/subsided soils, stressed vegetation or unusual/noxious odors. None of these environmental indicators were present in appreciable amounts. The land surface did not exhibit visual indicators for buried containers such as surfacing of product residue, soil mounding, or soil depressions. It was obvious that since virtually the entire property is in agricultural production, the crops would most likely show severe stress if there were shallow subsurface contamination. It is usually only after a contaminant plume has impacted a domestic well that buried pesticide containers are discovered. If buried items are discovered during any future earthwork procedures, etc., the San Joaquin County Environmental Health Department must be contacted immediately. §3. 3.53.5 It is a possibility minute volumes of agrichemicals sprayed on surrounding properties May fltift onto the subject property, in addition to the agrichemicals applied to the subject acreage. The site can be considered in the predominant downgradient windshed to other agricultural production acreage. In addition, the San Joaquin County Mosquito Abatement District may spray for mosquitoes on and around the property. The herbicides Roundup (Glyphosate) and Accent(Nicosulf rron)have been applied to the acreage for weeds. Round-up Ready alfalfa is grown in which Roundup is applied to the growing alfalfa without crop injury. Environmental Fate Data for Roundup and Accent are found in Appendix D, and show that both materials are moderately persistent and have comparatively short half-lives within the soil environment. Both pose minimal risk of leaching to groundwater. Mixing of these two materials with water occurs off-site because a custom applicator applies these materials to the farmable acreage. An important concern associated with the environmental assessment of open properties is the issue of buried containers or discarded items. It was an occasional practice to dispose of containers or discarded items by this method many years ago. 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. One electrical transformer was observed on the property. No oil le no since the transformer appears to be relatively new, as noted in the Photogra6hic Plate J. jFro itrate Loading and Soil Suitability Studies done south of the property, it is known there a high co centrations of nitrate in the underlying water table and drinking water aquifers. This uted to the comparatively shallow groundwater elevation, and the intensely fanned region. If high nitrate concentrations are detected under the property, it can be attributed to the application of nitrogen fertilizers in the surrounding agricultural environments. Forage crops require comparatively high-nitrogen concentrations. Page-4- Chesney Consulting