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CONCLUSIONS AND RECOMMENDATIONS From visual observations, there is no surface contamination on the subject property from significant hazardous materials, or other types of environmental concerns. There are however, several items of concern that may contain hazardous materials residue. These items are in the �5'J process of being removed from the property by Mr. &Mrs. Tivald. These items are either being recycled, properly disposed of at a landfill, or being sold to collectors, or scavengers. Private homesites and typical household "hazardous materials" include pesticide sprays, gasoline, paint thinners, used motor oil, antifreeze, etc. The ASTM E-1527-00 Environmental Site Assessment Document refers to de minimus environmental conditions. De minimus conditions generally do not present a material risk to public health or to the environment and generally would not include an enforcement action if observed by the appropriate governmental agencies. Household hazardous materials may be considered de minimus concerns if there has been no o spillage or dumping, which were not observed. This also applies to the on-site septic system that serves the residential structure. Therefore, as January 20, 2004 'hich was the date of the last inspection of the property, and in with oaquin-Dev_elopment Title 9-905.12 (c), removal of these items to prevent inadvertent surface contamination from potential product residue leakage is the only corrective action recommended nirequire d within the boundaries of the property. It is my professional opinion that since the property has not been in annual or permanent crop production for more than 35 years, it is therefore unaffected by agrichemical impact from on-site applications. The probability of subsurface contamination from pesticides, or other types of agrichemicals that may have drifted onto the property, can be considered extremely remote. This considers the environmental fate data for DDT and related compounds presented above, which would be the most likely persistent agrichemical, and the herbicide Round-up®. Attached environmental fate data for Round-up reveals that it is moderately persistent in soil, with a half life of 47 days and it is strongly adsorbed in most soils. It does not readily leach through the J� soils. The depth to groundwater of 122 feet would make impact from this material or any other adverse constituents a very low probability in comparison to a shallow groundwater depth. Due to the fact that the dairy cattle population that was on the property before 1959, and the number of beef cattle subsequently run on proposed Parcels 2, 3 and 4 after this date, were apparently comparatively low in comparison with the subject property land base of 9.24 acres, ''1, adverse environmental impact to the underlying groundwater, primarily nitrate-nitrogen originating from liquid and solid cattle wastes, should be an inconsequential concern. The probability for nitrate contamination of the underlying aquifers originating from surrounding septic systems is low due to the very low density of systems in the study area. Since there are no municipal water and sewer utility hookups available, the proposed parcels created from this land subdivisionn will have domestic wells and on-site septic systems. '� P Page -6JJ - Chesney Consulting