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by the San Joaquin River at Monitoring Station R-1 is far greater than the load from the WQCF at project build- <br /> out, the incremental change in DO due to the project would be minor both in the San Joaquin River downstream <br /> of the WQCF and in the SDWSC. Therefore,based on a review of the above information, this impact is <br /> considered to be less than significant. <br /> 9 <br /> m 8 <br /> L <br /> O <br /> J _ <br /> E <br /> c 7 <br /> N <br /> 0) <br /> X <br /> 0 <br /> N <br /> 0 <br /> 6 <br /> Min. DO No Discharge <br /> p Min. DO 9.87 MGD <br /> )K Min. DO 17.5 MGD <br /> e Min. DO 27 MGD <br /> 5 <br /> Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec <br /> Month <br /> Source: LWA 2007 <br /> Monthly Minimum Dissolved Oxygen from Streeter-Phelps Analysis of <br /> San Joaquin River and WQCF Discharge Exhibit 4.9-5 <br /> IMPACT Hydrology and Water Quality—Effects of Proposed Project Discharges on Electrical Conductivity <br /> 4.9-20 (EC)Concentrations in Receiving Waters. Modeling results for EC corresponding to critical and dry/ <br /> below normal water years, respectively, demonstrated that the incremental change in EC concentrations at <br /> the selected sites would be no greater than 2 pmho%m with buildout of the WQCF(27 mgd). Further, EC <br /> levels at far-field monitoring locations would be substantially below adopted Basin Plan water quality <br /> objectives. Therefore, the project's far-field EC impact would be less than significant. <br /> As described above, EC water quality objectives in the Delta are based on the San Francisco Bay/Sacramento–San <br /> Joaquin Delta Estuary Basin Plan(SWRCB 1995). Among the far-field sites considered in the analysis, EC <br /> objectives exist only for the Clifton Court and Delta Mendota Canal intakes which have a year-round objective of <br /> 1,000 µmhos/cm. The median EC levels for all far-field monitoring locations are projected to be between 547 and <br /> 599 µmhos/cm for critical water years and 338 to 656 µmhos/cm for dry/below normal water years, which is <br /> substantially less than the adopted objective of 1,000 µmhos/cm. Incremental changes in EC at each of the far- <br /> field monitoring locations would be no greater than 2 µmho/cm with buildout of the WQCF (27 mgd) Therefore, <br /> the project's far-field EC impacts would be less than significant. <br /> DER EDAW <br /> City of Manteca 4.9-47 Hydrology and Water Quality <br />