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DDE. Common name:DDE(p,p'-DDE;o,p'-DDE),product of DDT degradation. <br /> Half-lives in the environment: <br /> Air:Atmos.transformation lifetime est.to be< 1 d. <br /> Surface water:Hydrolytic half-life of >120 yr,est.half-life>300 d in lakes. <br /> Groundwater:N/A <br /> Sediment:N/A <br /> Soil:Field half life of 1000 d <br /> Biota: Elimination half-life of 340 d(rainbow trout),300 d for birds. <br /> Environmental Fate Rate Constants or Half-Lives: <br /> Volatilization:N/A <br /> Oxidation:N/A <br /> Hydrolysis:>120 yr <br /> Biodegradation:NIA <br /> DDD. Common name: DDD,TDE(tetrachlorodiphenylethane),product of DDT deg. <br /> Half-lives in the environment: <br /> Air: 17.7-177 h <br /> Surface water: 2-15.6 yr. Groundwater: 1680-270,000 h based on anaerobic soil study data <br /> Sediment:N/A <br /> Soil:Field half life of 2-15.6 yrs based on observed rates of biodeg.of DDT <br /> Biota: 119 hr in mussels. <br /> Environmental Fate Rate Constants or Half-Lives: <br /> Volatilization:Aquatic approx. 1 mo. <br /> Oxidation: Aquatic half-life approx.22 yr <br /> Hydrolysis: half-life of 570 d @ pH 9 and 190 yr @ pH 5 <br /> Biodegradation:Aqueous aerobic half-life of 2-15.6 yr <br /> Agricultural pesticide application documentation is retained for all the pesticide applications made to <br /> the property by the farmer who leases the property from Mr. Vander Beek. All of the agrichemicals <br /> applied to the subject property is done by custom applicators. Materials are pre-mixed at the <br /> applicators yard; therefore, there is no agrichemical mixing done on the subject property. Available <br /> Environmental Fate Data for the pesticides used on the property for the past three years was obtained <br /> from the U.C. Davis and Oregon State University Extoxnet System, and is found in Appendix D. <br /> The following chart summarizes the available Environmental Fate Data for the name and type of <br /> agrichemicals applied to the subject property. Noted times of duration are maximum values <br /> observed. The Fate Data is highly specific for various environmental conditions, and is normally <br /> expressed as half-lives in terms of days. <br /> LL�_ <br /> Page -6 �J <br /> - <br /> Chesney Consulting <br />