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through exposure to the atmosphere. Equipment used for purging will be thoroughly <br /> decontaminated between wells, and equipment rinsate samples would be collected as <br /> appropriate. Each well will be purged of at least four well volumes (well volume based on <br /> inside diameter of casing), or until measurements of pH, temperature, and specific electric <br /> conductivity (EC} have stabilized (pH constant within 0.1, temperature, constant within 1° <br /> Celsius, and EC within 10% of previous measurement). Specific conductance and pH meters <br /> will be calibrated at least once each day they are used. Purged monitoring-well water will be <br /> stored in 55-gallon drums. <br /> Groundwater-Sampling Apparatus <br /> P g PP <br /> LAfter completion of purging, groundwater samples will be drawn from the monitoring wells <br /> using cleaned Teflon bailers lowered partially through the groundwater surface, or with <br /> electrical submersible pumps or bladder pumps. Discharge rates during sampling will <br /> LI approximate 0.3 gallons per minute. Clean latex gloves will be worn during the sampling <br /> process. <br /> L <br /> L <br /> { <br /> L <br /> LI <br /> L <br /> workplan sopa.07400008-May,1945 SOP 3 -3 _ <br /> L <br /> &Associates <br />