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cover was placed over the top of the monitoring well. The top of casing elevation for the <br /> monitoring well was determined using standard surveying methods. <br /> GROUNDWATER QUALITY MONITORING WELL DEVELOPMENT <br /> Following construction and installation, the groundwater quality monitoring well was <br /> developed to improve the hydraulic conductivity between the filter pack and aquifer material. <br /> Well development consisted of mechanically surging the groundwater quality monitoring well <br /> with a vented surge block and bailing to remove material entering the groundwater quality <br /> monitoring well through the well screen as development operations proceeded. Development <br /> operations continued for approximately one hour with 10 gallons of groundwater bailed from <br /> the groundwater quality monitoring well. <br /> GROUNDWATER QUALITY SAMPLING - NEWLY INSTALLED AND PREVIOUSLY <br /> INSTALLED GROUNDWATER QUALITY MONITORING WELLS <br /> Prior to collecting any groundwater samples, the potentiometric surface elevation in the <br /> groundwater quality monitoring wells was measured. The groundwater quality monitoring <br /> wells were then purged of stagnant groundwater utilizing a decontaminated acrylic bailer. <br /> Prior to initial use the acrylic bailer was disassembled, washed in a mixture of Liqui-Nox and <br /> clear water, rinsed in clear water, rinsed in distilled water, rinsed in deionized water, allowed <br /> to air dry, and reassembled. Purged water was monitored for pH, temperature and <br /> conductivity. Purging ceased when temperature and conductivity readings had stabilized. <br /> Groundwater pH, conductivity and temperature were documented during purging operations. <br /> The groundwater quality monitoring wells were sampled utilizing a decontaminated stainless <br /> steel point-source bailer. Groundwater samples were collected in laboratory supplied <br /> 'Ig a l(.2-2) Page 4 <br />