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8,000 0.08 <br /> 6 MGD <br /> 7,000-- <br /> 0.06 <br /> 6,000 J <br /> Q 9.87 MGD 27 MGD E <br /> a 5,000 EDAW 2000 U 0.04 <br /> a <br /> f] <br /> U) <br /> 0.02 <br /> a 4,000 <br /> m <br /> E 8.11 MGD 17.5 MGD 0 ♦ 8.11 MGD from EDAW 2000 <br /> p <br /> 3,000 c ■ 9.87 MGD from EDAW 2000 <br /> 0 0.00 A g 11 to 9.87 MGD from EDA W 2000 <br /> 2,000 10 —fesgression%htionship <br /> 9.87 GD <br /> 1,000 <br /> Current +DO Demand Load(Ib/d) O -0.02 <br /> 0 -0.04 <br /> 0 5 10 15 20 25 30 0 2 4 6 8 10 <br /> WQCF Effluent Flowrate(MGD) Dissolved Oxygen in SDWSC with 6 MGD WQCF(mg/L) <br /> Figure 23: Ultimate Load of Dissolved Oxygen Demand from the WQCF for increasing ADWF(San Figure 24: EDAW 2000 Calculated Change in DWSC DO and Corresponding Regression Model <br /> Joaquin River DO Demand Load at R1 is 92,600 lbs/b at 1,250 cfs) <br /> The regression model is as follows: <br /> Because the link between WQCF discharge and the water quality in the DWSC is not direct and <br /> is influenced by natural(tides)and anthropogenic(barrier operation,dam releases)mechanisms, ADO_=6.43 x 10-9•(ATUOD)2—1.5 x 10-5•ATUOD+1.45 x 10-6•ATUOD•DO_, <br /> the model was run for 6.0,8.11,and 9.87 MGD(ADWF)discharge conditions and the paired +1.48 x 10-"•(ATUOD)2 DO_sc,+3.682•x10.3 DO_sc,-0.03994 <br /> outputs were used to form a regression between the modeled change in DWSC DO <br /> corresponding to the change in WQCF load of total ultimate oxygen demand. The regression Where: <br /> equation is used to evaluate the future change in DWSC DO due to the proposed project. A ATUOD=calculated change in total ultimate oxygen demand load from the WQCF(lb/d), <br /> multivariate regression equation was developed to relate the initial DWSC DO and the change in <br /> total ultimate oxygen demand to the change in DWSC DO. The regression model has essentially DO,,,, =Deep water ship channel dissolved oxygen(DWSC DO)before the TUOD load is <br /> an r2=1.0 and a corresponding p-value less than 0.0001,which allows the conclusion to be changed in the WQCF effluent(mg/L), <br /> drawn that the model used here is equivalent to the model used in the 2000 DEIR. The original ADODwsc=modeled change in DWSC DO due to the change in TUOD load from the <br /> model results from EDAW 2000 are plotted along with the new regression model in Figure 24. WQCF(mg/L). <br /> The biologically oxidizable constituents in the WQCF effluent and the load of total <br /> ultimate oxygen demand for various phases of expansion are listed in Table 30. Also <br /> included in the table is the change in TUOD load from the 6.0 MGD(ADWF)case <br /> providing one of the inputs to the regression model. The second input to the model is the <br /> original DWSC DO,and for the values listed in Table 30,the model is used to calculate <br /> the change in DWSC DO from what the DO would have been in the DWSC under the <br /> conditions that existed when the WQCF discharged at an ADWF of 6.0 MGD(ADWF). <br /> City of Manteca Antidegradation Analysis 73 June 2007 City of Manteca Antidegradation Analysis 74 June 2007 <br />