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8 <br />2.3 APPLICATION EQUIPMENT <br /> <br />To treat the lagoon with pesticides, the consultant uses a boat equipped with a pesticide <br />injection system. The Reward, and possibly the algaecides are drawn directly from a mix <br />chamber and are injected into the lower water column as the boat moves through the <br />problem area. A flowmeter-operated valve system monitors the delivery rate and allows a <br />predetermined amount of the pesticide concentration in the water column. <br /> <br />Table 1. Aquatic Pesticides <br />Proposed for <br />Redwood Shores Lagoon Aquatic Weed <br />Control <br /> <br /> <br />Pesticide Name <br /> <br />Active Ingredient <br /> <br />Target Pest/Application <br /> <br />Application Method <br /> <br />Earth Tee <br /> <br />Copper <br /> <br />Surface and subsurface <br />filamentous algae <br /> <br />Injected into water <br />column or surface <br />sprayed <br /> <br />Cutrine-Plus <br /> <br />Copper <br /> <br />Surface and subsurface <br />filamentous algae <br /> <br />Injected into water <br />column or surface <br />sprayed <br /> <br />Reward <br /> <br />Diquat dibromide <br /> <br />Widgeon grass <br /> <br />Subsurface injection <br />into water column <br /> <br />The surface spraying of copper-based algaecides is accomplished with the same boat, but set <br />up with a pump and tank spray equipment. The pump speed/pressure is set to minimize spray <br />drift and spraying is confined to periods of little or no wind. Listed below are the series of <br />steps followed for the surface spraying of these pesticides: <br /> <br />1. Tank mix the herbicides/algaecides as outlined above. <br />2. Work with the wind to keep it at applicators back. <br />3. Cover treatment area from open water area being sprayed. <br />4. Check tank mix level frequently to insure proper dosage rates are being applied. <br />5. Close chemical intake valve when pump is not in use. <br />6. Upon completion, flush the tank and pump system with water for a minimum of three <br />minutes. <br />6.3.A. - Page 173