Laserfiche WebLink
K Kennedy Jenks Geosyritec <br /> consultants <br /> 99.999 Existing Condition as Designed Alternative <br /> Flow <br /> v 99 <br /> c <br /> M 3 95 <br /> 0 90 <br /> 00 <br /> LL <br /> 80- <br /> X <br /> 0 L <br /> M 30 <br /> 0 20 <br /> 0 10 <br /> 0 <br /> 5- <br /> 0 2 <br /> a 0.5 <br /> Avg. annual days with , <br /> flow above 0.01 cfs: 348 <br /> 0.001 <br /> 10-2 10-1 100 101 102 <br /> Flow, cfs <br /> Figure 5: Probability of flow exceedance on days with flow at Compliance Monitoring Location <br /> PMGI for Existing Condition as Designed. On average,flow is present at PMGI 348 days per a <br /> year for this alternative. <br /> 5.1.2. Copper Water Quality Exceedance <br /> The Existing Condition as Designed showed poor performance for Total Copper of the over the <br /> simulation. Treated water does not mix with untreated water in this alternative,thus concentrations <br /> of water are always fully untreated. The Copper NEL is exceeded approximately 11%of days with <br /> flow, or approximately 38 days a year, as shown in Figure 6. A comparison of the MC results to <br /> historic data collected in the last 10 years from the Bi-Annual Sampling Plan is shown in Figure 7 <br /> and show decent agreement. The MC results show slightly less frequent exceedance. This is likely <br /> due to not capturing the full natural variability of the data and potentially recent source control <br /> measures skewing the distribution. <br /> Appendix B,Page 8 <br /> Privileged and Confidential Attorney-Client Work Product <br />