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7Fromate testing of water wells in the area, and the nitrate concentration maps at EHD, it is notedte concentrations vary in the regional underlying groundwater between 10 and 44 ppm, withppeing the Maximum Contaminant Level. Testing of the domestic wells that serves both residences will be required for the Soil Suitability Study. IV. SITE RECONNAISSANCE AND INTERVIEWS The following site specific information was obtained from direct observations and an interview with Mr. Darwin Inman on January 24, 2005. The date of the final inspection of the property was February 28, 2005. There are two domestic wells and two septic tanks on the property that serve the two single family residential structures. Irrigation of the pasture land is provided by O.I.D. The entire acreage was walked and surveyed for evidence which may suggest surface and/or subsurface contamination: No hazardous materials were noted on the property, other than de minimus materials. This included a 25-gallon barrel of new oil that is stored in the garage/shed on a concrete floor. No evidence of drug manufacturing or the dumping of drug-related chemicals was observed on any of the roads or open areas, and/or on acreage surrounding the property. Containers were not observed. No evidence of solid waste disposal was noted, except what has been placed in a large roll-off bin near Mr. Inman's residence. Other non-hazardous solids wastes noted were twine, plastic, wood, metal, concrete, and wire. Several tires are used for irrigation erosion control. New farm implements are located near Mr. Inman's residence and old farm implements exist near the hay barn. The site was carefully inspected for environmental concerns originating from discolored, disturbed/subsided soils, stressed vegetation or unusual/noxious odors. None of these environmental indicators were observed. As evidenced by the attached photographs, no hazardous materials are stored on-site and there was no indication or observations of spills or other items associated with hazardous materials. i An important concern associated with the environmental assessment of open properties is the issue of buried pesticide 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. The examined land surface did not exhibit visual indicators for buried containers such as surfacing of product residue, soil mounding, or localized soil depressions. Given the extreme compactness of the underlying soils, in particular the hardpan stratum that exists in this locale, deeply buried material, other than a fuel tank, may be considered unlikely. It is usually after a contaminant plume has impacted a domestic well that buried artifacts are discovered. If buried items, or other types of subsurface environmental concerns are discovered at any time in the future, the San Joaquin County Environmental Health Department must be contacted immediately. 4 Chesney Consulting