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WASTE DISCHARGE REQUOMENTS ORDER NO. R5-2004-002$• -32- <br /> CITY OF MANTECA, CITY OF LATHROP AND DUTRA FARMS <br /> WASTEWATER QUALITY CONTROL FACILITY <br /> SAN JOAQUIN COUNTY <br /> Monthly Weekly 1-How Daily <br /> Constituents Units Average Average Average Maximum <br /> Nitrate(as N) mg/1 10 --- --- --- <br /> lb/day3 680 --- --- --- <br /> Nitrite (as N) mg/l 1 --- --- --- <br /> lb/day' 68 --- --- --- <br /> Bis(2-ethylhexyl) ug/1 22 --- --- 44 <br /> phthalate <br /> lb/day' 1.5 --- --- 3 <br /> Bromodichloromethane ug/l 5 --- --- 8 <br /> lb/day' 0.34 --- --- 0.54 <br /> Dibromochloromethane ug/l 1.4 --- --- 2.8 <br /> lb/day' 0.095 --- --- 0.19 <br /> Mercury ug/l --- --- --- --- <br /> lb/year 0.69 --- --- --- <br /> 2,4,6-Trichlorophenol ug/l 34 --- --- 69 <br /> lb/day3 2.3 --- --- 4.7 <br /> 1 5-day, 20°C biochemical oxygen demand(BOD) <br /> 2 To be ascertained by a 24-how composite <br /> 3 Based upon a design treatment capacity of 8.11 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 /> 7 State Water Resources Control Board Decision 1641 requires that the 1000 <br /> umhos/cm objective be met year round until 1 April 2005 at which time the <br /> seasonal objectives will be effective. <br /> 3. Effective 1 February 2009, the effluent concentrations and mass loading shall not exceed <br /> the following limits: <br /> Monthly Weekly 1-Hour Daily <br /> Constituents Units Average Average Average Maximum <br /> BOD' 1119/1 102 202 -- 302 <br /> lb/day' 820 1650 --- 2470 <br />