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%".. ..i PESTICIDE OR TYPE SOIL PERSISTENCE WATER FERTILIZER APPLIED PERSISTENCE TO THE PROPERTY (Common Name) Special Electric Fungicide Common element Common element Sulfur found in nature found in nature (RoundUp) Herbicide 1 - 174 days 12 - 70 days. Little Glyphosate risk to groundwater Goal Herbicide 30-40 days Very Little risk to Oxyflurofen groundwater Provado Insecticide 48-190 days Generally not a high Imidacloprid risk to groundwater 5.0 CONCLUSIONS AND RECOMMENDATIONS ✓§ 5.1 From visual observations, there is no surface contamination on the subject property, other than very minor oil/diesel staining in the equipment yard near the shop. This is a common occurrence that can be observed in virtually every farming operation. No soil staining was observed from the mixing of agrichemicals. The date of the last inspection of the property was December 18, 2006. Section 9-905.12 of the San Joaquin County Development Title states "Corrective Action: If the report indicates there are surface and subsurface contamination, corrective action shall be recommended in the report and concurred with by Environmental Health prior to the issuance of the building permit." Therefore, it is my professional opinion that no corrective action is required on the Parcel that compose the subject property, as assessed. The probability of subsurface contamination from pesticides,or other types of agrichemicals,can be considered low-to-medium. Depth to groundwater of 5 to 10 feet would make impact from adverse constituents a higher probability in comparison to a deeper groundwater depth of say 30+feet below grade. The surface and subsurface soil types are a silty clayey soil with a higher biological activity than in a sandy soil, and therefore a medium-to-high decomposition capacity of agrichemicals that are currently applied, and were applied in the past. The organic matter of the soil is probably high, which can also contribute to decomposition of organic materials. Evaluation of each point source potential contamination described(i.e., the existing septic systems, the nearest underground leaking storage tanks, the on-site above ground storage tanks, agrichemical mixing areas, and the pressure washer system), and non-point sources (i.e., on-site and surrounding agrichemical applications and non-target drift,nitrate from on-site and surrounding fertilizer applications, and the extremely slight possibility of DDT soil concentrations)pose a low-to-medium risk to the environment and to human health, in my professional opinion. The ASTM E-1527-00 Document referenced on Page 2 refers to de minimus environmental conditions. De minimus conditions generally do not present a material risk to public health or to the Lenvironment and generally would not include an enforcement action if observed by the appropriate governmental agencies. Page -7- Chesney Consulting