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WASTE DISCHARGE REQUOMENTS ORDER NO. R5-2004-0020 =30 <br /> CITY OF MANTECA, CITY OF LATHROP AND DUTRA FARMS <br /> WASTEWATER QUALITY CONTROL FACILITY <br /> SAN JOAQUIN COUNTY <br /> Monthly Weekly 1-Hour Daily <br /> Constituents Units Average Averaize Average Maximum <br /> Nitrate (as N) mg/l 10 --- --- --- <br /> lb/day3 580 --- <br /> Nitrite (as N) mg/1 1 --- --- --- <br /> lb/day' 58 --- --- --- <br /> Bis(2-ethylhexyl) ug/1 22 --- --- 44 <br /> phthalate <br /> lb/day3 1.3 --- --- 2.6 <br /> Bromodichloromethane ug/1 5 --- --- 8 <br /> lb/day' 0.29 --- --- 0.46 <br /> Dibromochloromethane ug/1 1.4 --- -- 2.8 <br /> lb/day3 0.08 -- -- 0.16 <br /> Mercury ug/l --- --- <br /> lb/year 0.69 --- --- --- <br /> 2,4,6-Trichlorophenol ug/l 34 --- --- 69 <br /> lb/day3 2 --- --- 4 <br /> 1 5-day, 20°C biochemical oxygen demand(BOD) <br /> 2 To be ascertained by a 24-hour composite <br /> 3 Based upon a design treatment capacity of 6.95 mgd. <br /> 4 Weekly median <br /> 5 Expressed as a 4-day average <br /> 6 The Discharger may conduct a water effect ratio study to develop a site-specific <br /> objective, and upon adoption and approval of a Basin Plan amendment,the permit <br /> may be reopened and the aluminum limitation reconsidered. <br /> 2. Effective 1 April 2004, and through 31 January 2009, the effluent concentrations and mass <br /> loadings shall not exceed the following limits: <br /> Monthly Weekly 1-Hour Daily <br /> Constituents Units Average Average Average Maximum <br /> BOD' mg/1 202 302 --- 502 <br /> lb/day' 1350 2030 --- 3380 <br /> Total Suspended Solids mg/l 202 302 --- 502 <br /> ib/day' 1350 2030 --- 3380 <br />