Laserfiche WebLink
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 I" <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 /> After 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 /> approximate 0.3 gallons per minute. Clean latex gloves will be worn during the sampling <br /> process. <br /> i <br /> i <br /> L � <br /> L <br /> i <br /> work;,.n sora-("400M-xe�isaa J"19" SOP 3 -3 <br /> &Associates <br /> 1 <br />