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FDDT. CommonDDT. Common name:Agritan,Anofex,Azotox,et al. Half-lives in the environment: Air: 17.7-177 h. Surface water: 73.9 h for a pond 1 m deep.Degradation half-life of about 10 yr-average from loss rates determined in Lake Michigan. Groundwater: 16 d to 31.3 yr. Sediment: 3 to 5 yr Soil:2-15.6 yrs based on observed rates of biodegradation in aerobic soils under field conditions. Avg.half life of-12 yrs in 3 different soils for-50 ppm in soil.(conversion of p,p'-DDT to p,p'-DDE). Environmental Fate Rate Constants or Half-Lives: Volatilization:Half-life of 3.7 d for water depth of 1 in,from soil w/h-I of 578 h Oxidation: Photooxidation half-life of 168-8400 h in water, 17.7-177 h in air Hydrolysis:Estimated first-order half life of 22 yr Biodegradation:Aqueous aerobic half-life of 2-15.6 yrs DDE. Common name:DDE(p,p'-DDE;o,p'-DDE),product of DDT degradation. Half-lives in the environment: Air: Atmos.transformation lifetime est.to be< 1 d. Surface water:Hydrolytic half-life of >120 yr,est.half-life>300 d in lakes. Groundwater:N/A Sediment:N/A Soil: Field half life of 1000 d Biota: Elimination half-life of 340 d(rainbow trout),300 d for birds. Environmental Fate Rate Constants or Half-Lives: Volatilization:N/A Oxidation:N/A Hydrolysis:>120 yr Biodegradation:N/A 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. 1 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 the pesticide applications made to the property by Mr. Stokes and is found as the first document in Appendix D. All of the agrichemicals applied to the subject property are done by Stokes Farms. Materials are pre-mixed at their yard in the northeast corner of the 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 also found in Appendix D. The following chart summarizes the available Environmental Fate Data for the name and type of agrichemicals applied. 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. Page -6- Chesney Consulting