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Near and Far Field Dilution Analysis of Manteca Discharge October 2006 <br /> 2002 Simulation Results <br /> Tidally averaged effluent concentrations for the 2002 simulations with 9.87 MGD, 17.5 <br /> MGD and 27 MGD Manteca discharge rates are plotted for the six key locations in <br /> Figure 37. The range of concentrations at each location is analyzed. November- <br /> December 2001 were simulated for model spin up, but results for this time are not shown. <br /> In Figure 44, at the Clifton Court intake, peak effluent concentrations occur at the end of <br /> May. The lowest concentrations occur in early February and late July through August. <br /> The effluent concentration for the 9.87 MGD case ranges from near zero to 0.6%. For <br /> the 17.5 MGD case, effluent concentration ranges near zero to 1%, and for the 27 MGD <br /> case, it ranges from 0.1%to 1.5%. <br /> In Figure 45, at the Delta Mendota Canal intake at Lindemann Road,peak effluent <br /> concentrations occur at the end of May. The lowest concentrations occur in late July. <br /> With the exception of May, the concentrations are fairly consistent throughout the year. <br /> The effluent concentration for the 9.87 MGD case ranges from 0.1%to 0.6%. For the <br /> 17.5 MGD case, effluent concentration ranges from 0.2% to 1 %, and for the 27 MGD <br /> case, it ranges from 0.3%to 1.5%. <br /> In Figure 46, at the Contra Costa intake in Rock Slough,peak effluent concentrations <br /> occur at the beginning of June. Concentrations are near zero throughout much of the year <br /> except for May through early July and late October through December. The effluent <br /> concentration for the 9.87 MGD case ranges from near zero to 0.1%. For the 17.5 MGD <br /> case, effluent concentration ranges near zero to 0.3%, and for the 27 MGD case, it ranges <br /> from near zero to 0.4%. <br /> In Figure 47, at the Contra Costa intake in Old River, peak effluent concentrations occur <br /> at the beginning of June. Concentrations are near zero during February through April and <br /> throughout August. The effluent concentration for the 9.87 MGD case ranges from near <br /> zero to 0.2%. For the 17.5 MGD case, effluent concentration ranges near zero to 0.4%, <br /> and for the 27 MGD case, it ranges from near zero to 0.6%. <br /> In Figure 48, at San Joaquin River at Light 18, peak effluent concentrations occur at the <br /> end of October. The lowest concentrations occur during late January through mid <br /> February and late July through mid August. The effluent concentration for the 9.87 <br /> MGD case ranges from near zero to 0.5%. For the 17.5 MGD case, effluent <br /> concentration ranges from less than 0.1%to 1%, and for the 27 MGD case, it ranges from <br /> 0.1% to 1.5%. <br /> In Figure 49, at the Stockton Turning Basin, peak effluent concentrations occur at the <br /> beginning of October. The lowest concentrations occur in mid January and mid May. <br /> The effluent concentration for the 9.87 MGD case ranges from 0.5%to 1.2%. For the <br /> 17.5 MGD case, effluent concentration ranges from 0.8% to 2.1%, and for the 27 MGD <br /> case, it ranges from 1.3%to 3.3%. <br /> Results are summarized in Table 6. <br /> 50 <br />