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until at least three well-casing volumes had been removed. The groundwater was then <br /> permitted to recover until at least 80-percent of the initial well volume had returned. <br /> The color, clarity, sand content, pH, temperature, and specific conductance of water <br /> removed from these wells were monitored throughout the purging. Discharge water was <br /> disposed of as directed by NSPC. Table 1 lists the parameters measured during the <br /> monitoring event. <br /> TABLE 1 <br /> Field Measurements Of Groundwater Depth,Temperature, pH And Conductivity <br /> Monitoring Date Depth to Temperaturel pH Conductivityz <br /> Well No. Groundwater <br /> MW-1 28 April 92 24.98 793 7.3 2 <br /> MW-2 28 April 92 23.75 79.0 7.08 2230 <br /> MW-3 28 April 92 25.18 81.0 7.28 2620 <br /> MW-4 28 April 92 DRY NA NA NA <br /> NA Not measured <br /> '1 Temperatures measured in degrees Fahrenheit <br /> 'z Conductivity measured in micromhos/centimeter <br /> Following the purging and recovery of the monitoring wells, water samples were collected <br /> v <br /> with a Voss Technologies disposable polyethylene bailer. The bailer was lowered into the <br /> center of the water column of each well with a new nylon line. After the bailer was <br /> retrieved, sample containers were filled from the bailer using a disposable polyethylene <br /> bottom-emptying device so that there was no head-space remaining in the container. The <br /> Sample containers were labeled with information including the sample number, well <br /> number, date of collection, time of collection, name of collector, owner, and analysis <br /> required before placing the containers in an ice-chilled cooler. The cooler was delivered <br /> to American Environmental Laboratories Corporation (AELC) (State Certification <br /> No. 1233). Chain-of-Custody was maintained through delivery of the samples to the <br /> laboratory. <br /> rmgoet�-z> Page 6 <br /> AMERICAN <br />