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K Kennedy Jenks Geosyritec <br /> consultants <br /> NAVgg Hybrid (Small Pump) Alternative: Treated <br /> 99gg�9�8 Flow <br /> 9959 <br /> a� 98 <br /> 95 <br /> 90- <br /> 80 �m`ez<d-,�mac«ea « Qncarru�aeca«a,an,ca«cr a <br /> X� 70 <br /> w 60 , . <br /> 0 40- <br /> 30 „ <br /> O 20 <br /> 0 10 <br /> � 5 <br /> 0 <br /> L <br /> d 2- <br /> 1 <br /> 0.5 Avg. annual days with <br /> 0U flow above 0.01 cfs: 79 <br /> 10-2 l0-1 100 101 <br /> Flow, cfs <br /> Figure 30: Probability of flow exceedance on days with flow from the treatment system outflow <br /> structure (treated only) to Compliance Monitoring Location PMG1 for the Hybrid (Small Pump) <br /> Alternative. On average,treated flows are present at PMGI 79 days per a year for this alternative. <br /> 5.4.2. Copper Water Quality Exceedance <br /> The Hybrid(Small Pump) Alternative showed very good treatment system performance for Total <br /> Copper over the course of the simulation. Concentrations at PMG1 exceeded the Copper NEL less <br /> than 0.1% as shown in Figure 31. Treated water concentrations leaving the filter did not exceeded <br /> the Copper NEL, as shown in Figure 33. As expected, the bypass location has approximately the <br /> same probability of exceeding the NEL as the untreated Existing Condition as Designed <br /> Alternative, however,the results show less confidence because of less days of flow from which to <br /> sample a concentration as shown in Figure 32.Overall,these results display a low risk of exceeding <br /> the Copper NELs for the Hybrid(Small Pump) Alternative. <br /> Appendix B,Page 33 <br /> Privileged and Confidential Attorney-Client Work Product <br />