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year flow conditions therefore represents a conservative approach to the assessment of potential impacts of the <br /> proposed project on the receiving water quality. <br /> Table 4.9-12 <br /> Projected Manteca WQCF Effluent Quality after Phase III Expansion <br /> Constituent Units Project Effluent Quality' <br /> Biochemical Oxygen Demand(BOD) mg/l 7 <br /> Total Suspended Solids(TSS) mg/l <10 <br /> Total Coliform MPN/100 mL <2.2 <br /> Turbidity NTU <2 <br /> Settleable Solids mg/l 0.1 <br /> Chlorine Residual mg/l 0.01 <br /> Oil and Grease mg/l 2.1 <br /> Aluminum µg/1 150 <br /> Electrical Conductivity(EC) µmhos/cm 825 <br /> Ammonia(as N) mg/l 1.5 <br /> Arsenic gg/1 8 <br /> Copper gg/1 7 <br /> Cyanide gg/1 1 <br /> Iron µg/1 50 <br /> Manganese gg/1 10 <br /> Methylene Blue Active Substances(MBAS) gg/1 160 <br /> Nitrate(as N) mg/l 5 <br /> Nitrite(as N) mg/l 1 <br /> Bis(2-ethylhexyl)phthalate gg/1 3.48 <br /> Bromodichloromethane µg/1 Nondetect in effluent(<0.2 gg/l) <br /> Dibromochloromethane gg/1 Nondetect in effluent(<0.3 gg/1) <br /> Mercury gg/1 0.010 <br /> 2,4,6-Trichlorophenol gg/1 3.28 <br /> All concentrations represent projected mean values taken from City of Manteca WQCF Master Plan Update(Nolte 2007). <br /> Source:LWA 2007 <br /> Far-Field Impacts Analysis <br /> The far-field water quality impacts assessment evaluates the effects of increasing WQCF discharge, from the <br /> permitted 9.87 mgd to a proposed 27 mgd effluent flow rate, on specific Delta locations where surface water is <br /> diverted for eventual use as drinking water and in the Stockton Deep Water Ship Channel(LWA 2007). Far-field <br /> water quality impacts were estimated using(1)historic WQCF effluent quality, (2)projected WQCF effluent <br /> quality after Phase III expansion, (3) current permitted and proposed future WQCF effluent flow rates; and(4) <br /> modeled percent contribution of WQCF effluent at select Delta locations under representative critical and <br /> dry/below normal water years. Estimated far-field water quality impacts were then evaluated as the change in <br /> EDAW DER <br /> Hydrology and Water Quality 4.9-28 City of Manteca <br />