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Far-Field Impacts <br /> The minimum and maximum calculated WQCF effluent contributions for six selected locations within the Delta <br /> corresponding to critical and dry/below normal water years are listed in Tables 4.9-14 and 4.9-15,respectively. <br /> These locations are illustrated on Exhibit 4.9-2. In general, the further away from the WQCF the far-field site is <br /> located,the lower the percent contribution of WQCF effluent, and as WQCF discharge increases, so does its <br /> percent contribution at far-field locations. There are no established objectives for the percent contribution a <br /> wastewater treatment facility's effluent can make within waters of the Delta. <br /> Table 4.9-14 <br /> Summary of Minimum and Maximum Effluent Concentrations for <br /> Critical Water Year Flowrates of 600 cfs at Vernalis <br /> Minimum Effluent Contribution Maximum Effluent Contribution <br /> Location 9.87 MGD 17.5 MGD 27 MGD 9.87 MGD 17.5 MGD 27 MGD <br /> Delta Pumping Plant Headworks(SWP) <0.1% <0.1% 0.1% 1.0% 1.7% 2.7% <br /> Delta Mendota Canal Intake(CVP) <0.1% 0.1% 0.1% 1.1% 1.9% 3.0% <br /> Pumping Plant#1 (CCWD) <0.1% <0.1% <0.1% 0.2% 0.3% 0.5% <br /> Intake at Old River(CCWD) <0.1% <0.1% <0.1% 0.3% 0.5% 0.8% <br /> San Joaquin River at Light 18 <0.1% <0.1% <0.1% 0.9% 1.6% 2.4% <br /> Stockton Ship Channel Turning Basin 0.2% 0.3% 0.5% 2.1% 3.7% 5.7% <br /> Source: LWA 2007 <br /> Table 4.9-15 <br /> Summary of Minimum and Maximum Effluent Concentrations for Dry/Below Normal Water Year <br /> Flowrates of 1,250 cfs at Vernalis <br /> Location Minimum Effluent Contribution Maximum Effluent Contribution <br /> 9.87 MGD 17.5 MGD 27 MGD 9.87 MGD 17.5 MGD 27 MGD <br /> Delta Pumping Plant Headworks(SWP) <0.1% <0.1% 0.1% 0.6% 1.0% 1.5% <br /> Delta Mendota Canal Intake(CVP) 0.1% 0.2% 0.3% 0.6% 1.0% 1.5% <br /> Pumping Plant#1 (CCWD) <0.1% <0.1% <0.1% 0.1% 0.3% 0.4% <br /> Intake at Old River(CCWD) <0.1% <0.1% <0.I% 0.2% 0.4% 0.6% <br /> San Joaquin River at Light 18 <0.1% 0.1% 0.1% 0.5% 1.0% 1.5% <br /> Stockton Ship Channel Turning Basin 0.5% 0.8% 1.3% 1.2% 2.1% 3.3% <br /> Source: LWA 2007 <br /> IMPACT Hydrology and Water Quality-Effects of Proposed Project Discharges on Dissolved Oxygen <br /> 4.9-19 Concentrations in Receiving Waters.Dissolved oxygen (DO) concentrations in the San Joaquin River <br /> and Delta with buildout of the WQCF(27 mgd) would not differ substantially from those that would occur <br /> under future or existing baseline conditions.Any minor effects that may occur due to the proposed project <br /> would constitute a less-than-significant impact to water quality. This impact is considered less than <br /> significant. <br /> DEIR EDAW <br /> City of Manteca 4.9-45 Hydrology and Water Quality <br />