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• Dove Plala <br />4.1 Monitorine Well Pureine <br />The sampling of ground water and surface water took place on January 27, 1991. Before <br />sampling each monitoring well, approximately three casing volumes were purged using a <br />dedicated teClon bailer and nylon rope. The volume calculation used during well purging was: <br />V= (Db - Dw) x 0.163 gal/ft <br />Where: V= One casing volume (gallons) <br />Db =Total well depth (feet) <br />Dw =Depth to water (feet) <br />0.163 =Conversion factor for 2-inch diameter casing <br />The total well depths and depths to water were measured from the tops of the well casings using <br />a Solinst water level indicator. Temperature and pH were measured and recorded during the <br />purging procedure. The pH and temperature were measured with an Orion 200 series portable <br />meter. The purged water volumes were measured in a calibrated 5-gallon bucket. Monitoring <br />personnel wore disposable latex gloves during purging activities. Special care was taken to keep <br />• the bailer rope from coming in contact with the ground. Disposable plastic was placed on the <br />ground surface around each monitoring well. <br />4.2 Sample Collection -Monitorine Wells <br />After three casing volumes had been purged from each well, and the temperature and pH had <br />stabilized, monitoring personnel began sampling. Two 40m1 VOA vials were filled and inspected <br />carefully to avoid collecting headspace bubbles. The remaining bailer volume was split between <br />Cive sample bottles. Subsequent bailer volumes were also split between the five sample bottles. <br />The samples were submitted to the laboratory for analysis of dissolved metals, anions, pH, <br />alkalinity, specific conductance, total dissolved solids, turbidity, hardness and total suspended <br />solids. The groundwater samples were stored in a cooler on ice, and delivered to Evergreen <br />Analytical, Inc., for analysis. Dedicated teflon bailers were used to sample each well to ensure <br />the prevention of cross-contamination. The bailers were cleaned after sampling using non- <br />phosphate soap, a methanol rinse, and a triple rinse with deionized water. The nylon bailer rape <br />was discarded after sampling each well. Clean latex gloves were used in sampling each well. <br />Pmjeci Noo6er. 219-9J-W2 <br />• Jaooary 21, 1991 <br />Page 3 <br />