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Table 4.9-9 <br /> Adopted Effluent Limits for City's WQCF Discharge to the San Joaquin River <br /> at a 9.87 MGD ADWF Design Treatment Capacity <br /> Constituent Units Monthly Average Weekly Average 1-Hour Average Daily Maximum <br /> Chlorine Residual mg/1 — 0.01111 0.02 — <br /> Oil and Grease mg/1 10 15 <br /> Aluminum µg/1 71 140 <br /> Electrical Conductivity9 µmhos/cm 1000 <br /> pH pH units 6.5 to 8 <br /> Ammonia as N mg/1 2.1 4.4 <br /> (June–September) <br /> Ammonia as N mg/1 2.8 5.6 <br /> (October–May) <br /> Arsenic gg/1 10 — <br /> Copper gg/1 7.9 — 10.4 <br /> Cyanide µg/1 3.7 10 <br /> Iron µg/l 300 <br /> Manganese µg/1 50 <br /> MBAS µg/1 500 <br /> Nitrate as N mg/1 10 <br /> Nitrite as N mg/l l <br /> Bis(2-ethylhexyl)-phthalate µg/1 22 44 <br /> Bromodichloromethane10 µg/1 30 47 <br /> Dibromochloromethane10 1Ag/1 7 16 <br /> Mercury lbs/year 0.69 <br /> 2,4,6-Trichlorophenol µg/l 34 69 <br /> Notes: <br /> mg/I=milligrams per liter <br /> µg/I=micrograms per liter <br /> NTU=nephlometric turbidity units <br /> MPN=most probable number <br /> lbs/yr=pounds per year <br /> µmhos/cm=microhmos per centimeter <br /> 1 5-day,20°C biochemical oxygen demand(BOD). <br /> 2 To be ascertained by a 24-hour composite sample. <br /> 3 Weekly median. <br /> °Does not exceed 23 in more than one sample in any 30-day period.No sample shall exceed 240. <br /> s Does not exceed an average of 2 NTU within a 24-hour period. <br /> s Does not exceed 5 NTU more than 5 percent of the time within a 24-hour period and 10 NTU at any time. <br /> Expressed as 4-day average. <br /> 8 Compliance with effluent limitations for aluminum specified in Order No.R5-2004-0028 shall be determined using acid soluble methods of <br /> measurement.The Discharger may conduct a water effect ratio study to develop a site-specific objective,and upon adoption and approval of <br /> a Basin Plan amendment,the permit may be reopened and the aluminum limitation reconsidered. <br /> 9 Effluent limitation adopted by State Water Resources Control Board in Order WQ 2005-0005. <br /> 10 Effluent limitation adopted by RWQCB in Resolution No.R5-20050110. <br /> Source:LWA 2007 <br /> EDAW DER <br /> Hydrology and Water Quality 4.9-22 City of Manteca <br />