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FGroundwater, dwater is found approxim ely 10 f t under theproperty of Equal Depth to Ground er p. From the 2003 Les of Equal Eleas illustrated vation attached the groundwater directional flow appears to be the west, toward the San Joaquin oundwater depth of 10 feet can be considered a shallow groundwater elevation which impacted from serious point source releases, and agrichemicals such as pesticides, herbicides, or nitrates from nitrogen fertilizers. The degree of impact from adverse constituents can be mitigated when there are intervening layers of clay soil down to the water table depth. This will be determined from the Soil Suitability and Nitrate Loading Studies. § 4.0 EVALUATION OF PAST AND CURRENT SOURCES OF CONTAMINATION IDENTIFIED AT OR NEAR THE SITE AND RECOMMENDATIONS FOR FURTHER ACTION § 4.1 valuation of each potential and/or known source of contamination identified in the above Sections have been discussed in the respective Sections to facilitate the transfer of information to the reader. — Based upon the State Water Resources Control Board- GeoTracker System, there are no records of Under Ground Storage Tanks (USTs) or Leaking Underground Storage Tanks (LUSTS) on the subject property. This is illustrated on the attached GeoTracker Site Map, which shows the nearest UST at Union and Trahern Roads (3 miles to the southwest) and the nearest LUST to be on Veritas Road (3 miles to the northwest). The Inactive UST Facility Inventory List and the Underground Storage Tank Site Mitigation Database List,both from EHD, are found in Appendix C. The Lists show that there is no listing for the Circle JM Diary, or for the property address. Potential environmental impacts from past,present r or future facilities within a one mile radius of the property are unknown at this time. However, there is a dairy nutrient holding pond on proposed Parcel "21" that may be contributing salts to the underlying groundwater. The science of pesticide residues in soil, air, surface water and groundwater is extremely complex and variable. Environmental models that attempt to predict pesticide behavior and transport in the environment are beyond the scope of this investigation. However, pesticides with long half-lives that may have been used or drifted onto the property decades ago,primarily DDT, may be of an extremely slight concern. DDT was used extensively throughout the agricultural fields of the San Joaquin Valley and degradates of DDT can be found in nearly all these soils. Previous Exposure Assessments made on typical San Joaquin Valley soils suggest an extremely low probability of adverse health effects from soil DDT/DDD and DDE concentrations (if the concentrations even exist). The environmental fate data are presented below for DDT, and its degradates DDD and LDDT.. Common name:Agritan,Anofex,Azotox,et al. Half-lives in the environment: Page -5- Chesney Consulting