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Water Quality Monitoring Plan Climax Molybdenum Company <br /> Version R4 Permit No M-1977-493 <br /> A bedrock POC well TM-MW-002D was constructed in August 2012 adjacent to the existing shallow GW#2. <br /> The baseline data set in Table B-3.4 (Appendix 13-3)was evaluated to establish the NPLs for this well and <br /> are listed in Table 5-7. <br /> Table 5.7-TM-MW-002D Numeric Protection Limits <br /> Analytical Parameter Frequency NPL(mg/L) NPL Basis <br /> Cadmium,dissolved Quarterly 0.005 Table 1,CBSG <br /> Copper,dissolved Quarterly 0.2 Table 3,CBSG <br /> Iron,dissolved Quarterly 0.3 Table 2,CBSG <br /> Manganese,dissolved Quarterly 0.05 Table 2,CBSG <br /> Molybdenum,dissolved Quarterly 0.210 Table 1,CBSG <br /> Zinc,dissolved Quarterly 2.0 Table 3,CBSG <br /> pH Quarterly 6.5-8.5 Table 2,CBSG <br /> Sulfate(SO4) Quarterly 250 Table 2,CBSG <br /> Total Dissolved Solids(TDS) Quarterly 400 Table 4,CBSG <br /> NOTES: <br /> Table 1, CBSG: Domestic Use Human Health Standards <br /> Table 2, CBSG: Domestic Use Secondary Drinking Water Standards <br /> Table 3, CBSG: Agricultural Use Standards <br /> Table 4, CBSG: TDS Water Quality Standards <br /> 5.2 Data Analysis <br /> 5.2.1 POC Groundwater Monitoring Sites NPL Evaluation <br /> This section presents the data analysis and reporting procedures established for POC wells: ARwell and <br /> ARK-MW-001 D in the Arkansas River Watershed; EVMW-3S, EVMW-31D and EV-MW-004 in the Eagle <br /> River Watershed; and GW#2 and TM-MW-002D in the Tenmile Creek Watershed. The data evaluation for <br /> the POC wells involves a comparison against NPLs, as provided in Tables 5-1 through 5-7. <br /> For POC wells, the first step in evaluating the results of individual sampling events will be a simple <br /> comparison against the NPL. If a sample result exceeds the NPL, field forms will be reviewed and the <br /> laboratory will be contacted to check for potential errors. If the initial data quality review does not reveal <br /> any errors, the DRMS will be notified and the well will be resampled within 30 days of the receipt of the <br /> analytical data. If the second analytical result does not exceed the NPL, sampling will continue at the <br /> normally scheduled frequency. If the second sample confirms the first result, additional data evaluation <br /> including outlier tests and data distribution and trend analyses will be performed, along with the additional <br /> steps presented below. <br /> EPP—Appendix C March 2018 26 <br />