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• Flag all sensitive areas including wells, creeks, and wetlands prior to <br />spraying. <br />• Post notices and delineate the spray area prior to the application, as <br />required by the local jurisdiction or by Ecology. <br />• Conduct spray applications during weather conditions as specified in <br />the label direction and applicable local and state regulations. Do not <br />apply during rain. or immediately before expected rain. <br />Recommended Additional Operational BMPs for the use of pesticides: <br />• Consider alternatives to the use of pesticides such as covering or <br />harvesting weeds, substitute vegetative growth, and manual weed <br />control/moss removal. <br />• Consider the use of soil amendments, such as compost, that are known <br />to control some common diseases in plants, such as Pythium root rot, <br />ashy stem blight, and parasitic nematodes. The following are three <br />possible mechanisms for disease control by compost addition (USEPA <br />Publication 530-F-9-044): <br />1. Successful competition for nutrients by antibiotic production; <br />2. Successful predation against pathogens by beneficial <br />microorganism; and <br />3. Activation of disease -resistant genes in plants by composts <br />Installing an amended soil/landscape system can preserve both the plant <br />system and the soil system more effectively. This type of approach <br />provides a soil/landscape system with adequate depth, permeability, and <br />organic matter to sustain itself and continue working as an effective <br />stormwater infiltration system and a sustainable nutrient cycle. <br />• Once a pesticide is applied, evaluate its effectiveness for possible <br />improvement. Records should be kept showing the effectiveness of the <br />pesticides considered. <br />Develop an annual evaluation procedure including a review of the <br />effectiveness of pesticide applications, impact on buffers and sensitive <br />areas (including potable wells), public concerns, and recent <br />toxicological information on pesticides used/proposed for use. If <br />individual or public potable wells are located in the proximity of <br />commercial pesticide applications, contact the regional Ecology <br />hydrogeologist to determine if additional pesticide application control <br />measures are necessary. <br />• Rinseate from equipment cleaning and/or triple -rinsing of pesticide <br />containers should be used as product or recycled into product. <br />For more information, contact the Washington State University (WSU) <br />Extension Home -Assist .Program, (253) 445-4556, or Bio-Integral <br />Resource Center (BIRC), P.O. Box 7414, Berkeley, CA.94707, or EPA to <br />Volume IV - Source Control BMPs — December 2014 <br />2-24 <br />