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NCK <br /> NG Compliance Results <br /> Per the permit requirement,samples are taken twice a month for various analytes.Some of which are twice a <br /> month while others are only once due to their limited or non-detect concentrations in the source water. <br /> Beginning in the 2°d half of the month sampling for December 2021 through the March 15ih,2022 compliance <br /> samples,each report has proven the concept of the pilot treatment system.GIR has produced results that are <br /> far below the discharge limits with many of the resulting analytes coming back with non-detect values.All of <br /> the compliant data has been submitted via the NetDMR server and compiles all of the results from late <br /> December 2021 to early March 2022.These values are consistent in the remove of the contaminants listed in <br /> the permit with no exceedances present. <br /> Quality Assurance/Quality Control(QA/QC) <br /> As GIR implemented the pilot water treatment system at the site,numerous source water,influent to the <br /> water treatment plant(WTP),post filtration,and post Metsorb media were taken to ensure the system was <br /> performing per design.This not only enabled a vast database of historic data to improve operation of the <br /> system but allowed trending of performance based on various factors whether that be pressure differential <br /> across the bag canister filters or increased flow from one source water or another.The treatment system <br /> proved to handle multiple variations in operational conditions.Table 1 shows the internal sampling that was <br /> completed as part of the QA/QC program. <br /> Table 1:QA/QC Results <br /> Sample Sampled Analyte Result Units Type <br /> 280-157649-1 1/12/22 10:30 Chromium,trivalent ND mg/L TR <br /> 280-157649-1 1/12/22 10:30 Iron ND ug/L TR <br /> 280-157649-1 1/12/22 10:30 Arsenic ND ug/L TR <br /> 280-157649-1 1/12/22 10:30 Cadmium ND ug/L TR <br /> 280-157649-1 1/12/22 10:30 Chromium ND ug/L TR <br /> 280-157649-1 1/12/22 10:30 Copper ND ug/L TR <br /> 280-157649-1 1/12/22 10:30 Lead 0.72 ug/L TR <br /> PAGE 2 OF 29 <br />