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Near and Far Field Dilution Analysis of Manteca Discharge October 2006 <br /> Table 1 Summary of lowest dilution credits. <br /> Side Bank Dilution' Diffuser Dilution' <br /> (parts river water:1 part (parts river water:1 part <br /> wastewater) wastewater) <br /> Distance <br /> Downstream 9.87 17.5 27 9.87 17.5 27 <br /> Criterion (feet) MGD MGD MGD MGD MGD MGD <br /> Acute 45 0.35 0.19 0.17 13.3 7.3 4.6 <br /> Chronic 4,1002 2.4 1.3 0.90 11.8 6.4 4.0 <br /> Human Health 5,280 92.9 52.2 32.5 119 66.7 43.4 <br /> (1) Values are presented with the dilution credit,D,for direct use in effluent limit calculation: <br /> Ceff —Cplume <br /> D= where Ceff=effluent concentration, Cplume=plume concentration,and <br /> Cplume —Cup <br /> Cup=upstream concentration,which is zero. <br /> (2) Minimum dilution occurs at 4,100 ft downstream of discharge. These dilution values are <br /> appropriate for use in evaluating Chronic objectives. <br /> 14 <br />