Laserfiche WebLink
Mr. Howard Hold <br /> August 16,2004 <br /> Page 3 <br /> Monitoring Well Construction <br /> The final monitoring well designs will be based on the geophysical logs obtained in the field, <br /> lithologic evaluation,and correlation of the geologic data at the new sites with existing <br /> geologic data. The MW5A and MW6A wells will have total depths of approximately 140 <br /> feet. Well MW613 will be completed to a depth of approximately 240 feet. The boreholes for <br /> the shallow zone completions will be 12-1/4 inches in diameter with 6-inch diameter Class <br /> 200 PVC casing and screen. The borehole for the deep zone completion(MW613)will be 14 <br /> inches in diameter with 6-inch diameter Class 200 PVC casing and screen. Each wellhead <br /> will be secured with a locking mechanism to prevent vandalism. Example well profiles are <br /> shown in Figures 2 and 3. <br /> Monitoring well development will be performed by bailing and pumping. Final development <br /> will occur with submersible pumping equipment. <br /> Cuttings and fluids from the drilling program will be spread on the ground adjacent to each <br /> well location. Fluids generated from development activities will be discharged away from <br /> the monitoring well site at a location that will not impact site operations or(as applicable) <br /> nearby agricultural operations. <br /> Baseline Sampling <br /> Following well construction and development, dedicated pumping equipment will be <br /> installed in each well for ongoing evaluation and/or corrective action monitoring. <br /> Specifically, a dedicated submersible pump will be installed,this pumping equipment will <br /> also be used to collect the baseline samples. The initial samples will be analyzed for <br /> constituents in accordance with the requirements shown in Table I of the Kruger Foods— <br /> SMS Briners tentative revised Monitoring and Reporting Program (July 15,2004). Sampling <br /> will be conducted in accordance with standardized procedures,as discussed below. <br /> Purging and Sampling <br /> During purging, indicator parameters will be measured, including specific conductance (EC), <br /> pH, dissolved oxygen, turbidity, temperature, and redox. Indicator readings will be recorded <br /> on a field data sheet. Static and pumping water level measurements, pumping rate, <br /> measurement time, and all field parameters will also be recorded. <br /> Purging will include removal of at least three casing volumes. Field parameters will be <br /> checked to ensure water quality has stabilized. Upon achieving stabilization of indicator <br /> parameters, ground-water samples will be collected for analysis. <br /> Sample Handling and Ground-Water Chemical Anal <br /> As is routinely performed for the ongoing monitoring program, a state-certified laboratory <br /> will perform the analyses and the usual chain of custody procedures for sample handling will <br />