ARCHIVED REPORTS_DRAFT ENVIRONMENTAL IMPACT REPORT

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Table 28: Summary of Peak Percent Cross Section with greater than 1°F Temperature Table 49: Microfiltration and Reverse Osmosis Cost Estimates by Ratepayer Group Allocation Differential for Fall Critical Water Year Flowrates for Side Bank Discharge at 27 MGD for 21 MGD Treatment Capacity........................................................................................104 (ADWF)(RMA 2006)..........................................................................................................69 Table 50: Potential Environmental Impacts Associated with Microfiltration/Reverse Osmosis Table 29: Maximum Increment between Effluent Discharged via Diffuser and Ambient River Treatment of Wastewater....................................................................................................105 Temperature for a 1°F Differential between Thermal Plume and the Ambient River(RMA Table 51: Estimated Monthly and Annual Residential Sewer Rate Increases assessed to Current 2006).....................................................................................................................................69 Ratepayers to provide Debt Service for Alternative Control Measures.............................106 Table 30: Oxygen Demanding Substances and Loads from the WQCF for Increasing ADWF.75 Table 52: Estimated Annual Debt Service assessed to Current Non-Residential and All Future Table 31: Modeled SDWSC DO and Change from Currently Permitted Levels........................75 Ratepayers in WQCF Service Area....................................................................................107 Table 32: Monthly Input Values for Parameters in the Streeter-Phelps Dissolved Oxygen Model Table 53: Comparison of Current WQCF Treatment Cost to Estimated Costs of Alternative ...............................................................................................................................................76 Control Measures................................................................................................................108 Table 33: Initial Total Ultimate Oxygen Demand,Li,for Streeter-Phelps Analysis...................77 Table 54: Summary of Household Income Classes in the City of Manteca and their Relative Table 34: Streeter-Phelps Analysis Results for Project WQCF Flowrates ADWF 77 Contributions to Alternative Control Measure Annual Costs.............................................110 Table 35: Summary of Minimum and Maximum Effluent Concentrations for Critical Water Table 55: Percent Household Income and Average Annual Disposable Personal Income by Year Flowrates of 600 cfs at Vernalis(RMA 2006).............................................................82 Household Income Class Required to Finance Alternative Control Measure Costs..........111 Table 36: Summary of Minimum and Maximum Effluent Concentrations for Dry/Below Normal Table 56: Annualized Socio-Economic Impacts of Increased Sewer Fees Required to Finance Water Year Flowrates of 1,250 cfs at Vernalis(RMA 2006)...............................................82 Alternative Control Measure Costs.....................................................................................111 Table 37: Median Percent Contribution of WQCF Effluent at Select Locations within the Delta Table 57: Top 10 Sectors Affected by Implementation of Alternative Control Measures........112 for Critical Water Years(adapted from RMA 2006)............................................................90 Table 58: Comparison of the Socio-Economic Impacts and Environmental Benefits and Impacts Table 38: Median Percent Contribution of WQCF Effluent at Select Locations within the Delta of the Proposed Project and Two Alternative Control Measures.......................................114 for Dry/Below Normal Water Years.....................................................................................91 Table 39: WQCF Typical Effluent Quality for Historic and Future Conditions.........................91 List of Figures Table 40: Median Electrical Conductivity(EC)at Select Locations within the Delta for Project Scenarios under Critical Water Year Conditions..................................................................92 Figure 1: Lower San Joaquin River and Eastside Tributaries......................................................16 Table 41: Median Electrical Conductivity(EC)at Select Locations within the Delta for Project Figure 2: City of Manteca WQCF Outfall and San Joaquin River Monitoring Locations Scenarios under Dry/Below Normal Water Year Conditions...............................................93 providing data for Near-Field Water Quality Impacts Analysis...........................................21 Table 42: Median Dissolved Organic Carbon(DOC)at Select Locations within the Delta for Figure 3: Sacramento-San Joaquin Delta Monitoring Locations evaluated for Far-Field Water Project Scenarios under Critical Water Year Conditions.....................................................93 Quality Impacts Analysis......................................................................................................22 Table 43: Median Dissolved Organic Carbon(DOC)at Select Locations within the Delta for Figure 4: San Joaquin Valley Unimpaired Runoff and Water Year Classification:1990—200629 Project Scenarios under Dry/Below Normal Water Year Conditions..................................94 Figure 5: Projected Change in San Joaquin River Biochemical Oxygen Demand Concentration Table 44: Median Nitrate at Select Locations within the Delta for Project Scenarios under at WQCF R-3 with increasing WQCF Effluent Flowrate.....................................................34 Critical Water Year Conditions............................................................................................94 Figure 6: Projected Change in San Joaquin River Total Suspended Solids Concentration at Table 45: Median Nitrate at Select Locations within the Delta for Project Scenarios under WQCF R-3 with increasing WQCF Effluent Flowrate.........................................................36 Dry/Below Normal Water Year Conditions.........................................................................95 Figure 7: Projected Change in San Joaquin River Total Aluminum Concentration at WQCF R-3 Table 46: Alternative Control Measure Cost Sharing among WQCF Ratepayer Groups.........100 with increasing WQCF Effluent Flowrate............................................................................39 Table 47: Effluent-to-Land Disposal Cost Estimates by Ratepayer Group Allocation for 18 Figure 8: Projected Change in San Joaquin River Electrical Conductivity at WQCF R-3 during MGD Disposal Capacity.....................................................................................................101 April through August with increasing WQCF Effluent Flowrate.........................................41 Table 48: Potential Environmental Impacts Associated with Effluent-to-Land Disposal.........102 Figure 9: Projected Change in San Joaquin River Electrical Conductivity at WQCF R-3 during September through March with increasing WQCF Effluent Flowrate.................................42 City of Manteca Antidegradation Analysis vii June 2007 City of Manteca Antidegradation Analysis viii June 2007