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The surface soils are composed mostly of a Madera- Alamo complex (#195), with the northwest corner of the property being a Madera sandy loam (#193). Permeability is very slow in both of these soil types, primarily due to an underlying claypan/hardpan stratum. The characteristics of this soil type is what makes it conducive for rice production. There is also a high shrink-swell potential. Consequently, consideration should be given to a soils engineer assessing the on-site soils to provide foundation recommendations when the Parcels are developed. § 3.2, § 3.3, § 3.4, § 3.5. From nitrate testing of water wells in the area, and the nitrate concentration map at EFID, it is noted that nitrate concentrations vary in the regional underlying groundwater between 10 and 44 ppm. Testing of the domestic well that serves the Sorrenti residence one quarter mile south of the subject property reveals a nitrate(as nitrate) concentration of 11.8 ppm. his can be considered a relatively low concentration of nitrate. It is highly unlikel jJhat nitrate formation occurs under the rice paddies due to extreme anaerobic conditions. Agricultural pesticide documentation was obtained directly from the Sorrenti's, who retain all their pesticide application records to document applied materials every year. All of the agrichemicals applied to the subject property is done by custom applicators. Materials are pre-mixed at the Nunes Airstrip off Dodds Road; therefore, there is no agrichemical mixing done on the subject property. Available Environmental Fate Data for the pesticides used on the property for the past three years was obtained from the U.C. Davis and Oregon State University Extoxnet System, and is found in Appendix D. The Fate Data indicates most of the applied pesticides have comparatively short half- lives. Although DDT was banned in 1972, its presence in San Joaquin Valley soils is indicative of its long half-life of 15.6 years. Consequently, there may be extremely small concentrations of DDT and its degradates in the subject property soils. The following chart summarizes the available Environmental Fate Data for the name and type of - agrichemicals applied to the subject property. Noted times of duration are maximum values observed. The Fate Data is highly specific for various environmental conditions, and is normally expressed as half-lives in terms of days. PESTICIDE OR TYPE SOIL WATER FERTILIZER APPLIED PERSISTENCE PERSISTENCE TO THE PROPERTY (Common Name) Ammonium Sulfate Fertilizer Immediate plant uptake Unknown Copper Sulfate Fungicide Copper is an element- Copper is an element- will persist indefinitely will persist indefinitely (Ordram) Herbicide 5 -21 days Immediate hydrolysis Molinate 4 Chesney Consulting