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6. A small, gasoline powered, suction pump will be used to <br /> purge the well. The pump will be primed with clean <br /> water before pumping and the suction hose will be <br /> cleaned with trisodium phosphate (TSP) and rinsed with <br /> clean water before pumping. The suction hose from the <br /> pump will be lowered into the well so that its suction <br /> opening is approximately one to one and one-half feet <br /> below the water level in the well. With the discharge <br /> + hose from the pump inserted into a 55 gallon drum, the <br /> pump will be started. As the water level drops in the <br /> well , the suction hose will be slowly lowered deeper <br /> into the well. Pumping while lowering the hose will <br /> continue until approximately ten well casing volumes <br /> (about 30 gallons for a two inch well) of water have <br /> been pumped from the well. The suction hose will be <br /> removed from the well and step 7 will be followed. <br /> 7. After purging, a clean bailer will be lowered into the <br /> well, filled with water, and retrieved. A one liter (or <br /> quart) amber glass bottle will be rinsed by filling and <br /> emptying. The liter bottle will then be filled , re- <br /> filling the bailer as needed. This bottle will be <br /> capped without concern for trapped air. <br /> 7 <br />