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