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29 July 1999 <br /> AGE-NC Project No. 98-0426 <br /> Page 5 of 6 <br /> The remaining annular space will be filled to near the ground surface with a portland cement grout. <br /> Grouting procedures will be inspected by PHS-EHD personnel. Monitoring well construction is <br /> illustrated in Figure 3. <br /> Following completion of the monitoring wells,the top of well casings will be notched and the casing <br /> elevations will be surveyed. <br /> 4.4. WELL DEVELOPMENT <br /> Development will consist of a combination of bailing to remove the major portion of fine-grained <br /> sediment from inside the well, surging to flush out or draw in sediment from the filter pack, and <br /> additional bailing to finish the removal of sediment. Development activities will be continued until <br /> produced water appears to be sediment-free. <br /> 4.5. GROUNDWATER SAMPLING PROCEDURES <br /> Ground water sample collection will be performed in accordance with sampling protocols presented <br /> below. <br /> 4.5.1. Monitoring Well Purge Procedures <br /> The static water level will be measured to the nearest 0.01 foot in each well relative to the top of the <br /> well casing using an electric water level indicator. Following depth to water measurement, the well <br /> will be purged using a bailer or submersible pump. A minimum of three casing volumes of water <br /> will be removed from the well unless the well is purged dry. Ground water stabilization parameters <br /> (temperature, pH and conductivity) will be measured at regular intervals during purging. <br /> 4.5.2. Sample Collection <br /> The depth to ground water will be remeasured in each well to assure a minimum recharge of 80 <br /> percent prior to sampling. Water samples will be collected from each monitoring well using a new <br /> disposable polyethylene bailer and placed into appropriate laboratory-supplied containers. Following <br /> collection, the samples will be labeled, placed on ice and kept in a cooler until delivered to the <br /> laboratory for analysis. Chain-of-custody protocols will be used to document sample custody transfer <br /> from the field to the analytical laboratory. <br /> Advanced GcoEnviron mental,Inc. <br />