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14 April 2004 <br /> AGE-NC Project No.04-1143 <br /> Page 10 of 17 <br /> and it did not persist. On soil,photodegradation of sethoxydim takes less than 4 hours. The product <br /> Poast photodegrades on soil surfaces with a half-life of approximately 3.7 hours. Disappearance of <br /> sethoxydim is primarily due to action by soil microbes <br /> March 2001 PUR: <br /> LeafAct 80B Buffer Spreader. Application(2.19 gallons, 2.00 pints per 100 gallon) -This product <br /> also reduces the pH of the solution to around 5.0 and contains a spreader sticker. <br /> Lorsban. (4Q Dursban (chlorpyrifbsj: Application (6.56 gallons, 1.50 pints per acre) <br /> January 2001 PUR: <br /> VELPAR (Hexazinone): A General Use Pesticide (GUP). Application (23.1 pounds, 0.66 pounds <br /> per acre)-Hexazinone is a slightly toxic compound in EPA toxicity class I.Hexazinone is a triazine <br /> herbicide used against many annual,biennial, and perennial weeds, as well as some woody plants. <br /> It is mostly used on non-crop areas; however, it is used selectively for the control of weeds among <br /> sugar cane, pineapples, and lucerne. Hexazinone is a systemic herbicide that works by inhibiting <br /> photosynthesis in the target plants.Rainfall or irrigation water is needed before it becomes activated. <br /> It is available in soluble concentrate, water-soluble powder, or granular formulations. <br /> Hexazinon is not considered to be mutagenic, carcinogenic or teratogenic at expected doses. <br /> Hexazinone is of moderate to high persistence in the soil environment. Measured field half-lives <br /> range from less than 30 to 180 days, with a representative value of about 90 days. Hexazinone is <br /> broken down by soil microbes,which release carbon dioxide in the process. Sunlight may also break <br /> — down the compound via photodegradation.The rate ofbreakdown under natural field conditions will <br /> depend on many site-specific variables,including sunlight,rainfall,soil type,and rate of application. <br /> Hexazinone does not evaporate to any appreciable extent from soil. Hexazinone is very poorly <br /> adsorbed to soil particles,very soluble in water, and slowly degraded, so it is likely to be mobile in <br /> most soils and has the potential to contaminant groundwater. <br /> DIRER, (80DF) (diuron): Application (13.13 gallons, 3.00 pints per acre) <br /> CMR Herbicide Activator: Application (2.63 gallons, 2.00 pints per acre) <br /> Advanced GeoEnvironmental,Inc. <br />