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Section 11 <br />Water Quality Monitoring Plan <br />L_J <br />Exhibit 71-1. Compliance Monitorina Analvtical Parameters <br />Analytes Method Reporting Limit (Ng/L) <br />Barium EPA 200.8/200.7 1 <br />Beryllium EPA 200.8/200.7 1 <br />Boron EPA 200.8/200.7 100 <br />Cadmium EPA 200.8/200.7 1 <br />Chromium EPA 200.8/200.7 1 <br />Cobalt EPA 200.8/200.7 1 <br />Copper EPA 200.8/200.7 1 <br />Iron EPA 200.8/200.7 30 <br />Lead EPA 200.8/200.7 1 <br />Lithium EPA 200.8/200.7 100 <br />Manganese EPA 200.8/200.7 1 <br />Mercury EPA 245.1 1 <br />Molybdenum EPA 200.8/200.7 1 <br />Nickel EPA 200.8/200.7 1 <br />Selenium EPA 200.8/200.7 1 <br />Silver EPA 200.8/200.7 1 <br />Thallium EPA 200.8/200.7 1 <br />Uranium EPA 200.8/200.7 1 <br />Vanadium EPA 200.8/200.7 1 <br />Zinc EPA 200.8/200.7 1 <br />Notes: <br />1 Units in µg/L, unless otherwise noted. <br />2 Reporting limit will be specific to the electrode instrument utilized by the laboratory. <br />3 Radiochemistry samples have a sample specific Minimal Detectable Concentration (MDC) <br />calculated as the reporting limit. The MDC is affected by counting time, sample volume, TDS <br />concentration, and instrument background. <br />After five quarters of sample data have been collected from the compliance wells, the <br />sampling parameter list and sampling frequency may be reduced in consultation with <br />DRMS. <br />The quarterly groundwater monitoring data would be submitted to DRMS within 30 <br />days of receiving the laboratory data reports and an annual report would be provided <br />to DRMS that compiles the groundwater quality data, evaluates groundwater quality <br />trends, and compares the data to the compliance limit. <br />n <br />U <br />11-3 <br />T:\64986-Denison Mines\Task Order 4 - EPP Sunday Mines Group-Van4\Sunday Mines Group\DRMS RTC and Revised EPP\FINAL DRMS Report - EPP Sunday Mines.doc