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DDD. Common name:DDD,TDE(tetrachlorodiphenyledme),product of DDT deg. Half-lives in the environment: Air: 17.7-177 h Surface water: 2-15.6 yr. Groundwater: 1680-270,000 h based on anaerobic soil study data Sediment:N/A Soil:Field half life of 2-15.6 yrs based on observed rates of biodeg.of DDT Biota: 119 hr in mussels. Environmental Fate Rate Constants or Half-Lives: Volatilization: Aquatic approx. I mo. Oxidation:Aquatic half-life approx.22 yr Hydrolysis:half-life of 570 d @ pH 9 and 190 yr @ pH 5 Biodegradation:Aqueous aerobic half-life of 2-15.6 yr Agricultural pesticide application documentation is retained for all applications made to the property by Mr. Mike Rodoani,who is the farm manager of the property. As noted on the attached documents in Appendix B, the agrichemicals applied to the subject property are done by Mr. Rodoani as the custom applicator. Applications are either aerial, whereby the agrichemicals are mixed at the airstrip before application,but mostly application is done by ground rig. Agrichemical mixing for ground application is done on the subject property near the center of the property, south of the dairy buildings. The aforementioned nurse tank with a pump is filled with water with a hose over the top creating an air gap, then this water is used to fill spray tanks. Consequently, it is impossible for cross- contamination to occur to the domestic well. No soil staining,or containers were noted in this area agrichemical mixing area. Available Environmental Fate Data for the pesticides used on the property was obtained from the U.C. Davis and Oregon State University Extoxnet System, and is found in Appendix B. The following chart summarizes the available Environmental Fate Data for the name and type of agrichemicals that have been applied to the property for the past two seasons. 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 APPLIED TYPE OF SOIL PERSISTENCE WATER PERSISTENCE TO THE PROPERTY AGRICHEMICAL (Chemical Name) Caplan Fungicide 1 -10 days 23-54 hrs RovralIprodione Fungicide 7-60 days very rapid Asana Esfenvalerate Pyrethroid Insecticide 15-90 days 21 days RoundupGlyphosate Herbicide 47 days 12-70 days Supracide Methidathion Herbicide 5-23 days No detection in groundwater Surflan Oryzalin Herbicide 20- 128 days Slow breakdown LL Page-7- Chesney Consulting