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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2004-0028 -33- WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2004-0028 -34- <br /> CITY OF MANTECA,CITY OF LATHROP AND DUTRA FARMS CITY OF MANTECA,CITY OF LATHROP AND DUTRA FARMS <br /> WASTEWATER QUALITY CONTROL FACILITY WASTEWATER QUALITY CONTROL FACILITY <br /> SAN JOAQUIN COUNTY SAN JOAQUIN COUNTY <br /> Monthly Weekly 1-Hour Daily lb/day' 25 <br /> Constituents Units Average Average Average Maximum <br /> BOD' mg/l 102 202 --- 302 Manganese ug/l 50 --- --- --- <br /> lb/day' 820 1650 --- 2470 lb/day' 4.1 --- --- --- <br /> Monthly Weekly 1-Hour Daily Monthly Weekly 1-Hour Daily <br /> Constituents Units Average Average Average Maximum Constituents Units Average Average Average Maximum <br /> Total Suspended Solids mg/1 102 202 302 Methylene blue active ug/l 500 --- <br /> substances(MBAS) <br /> lb/day' 820 1650 --- 2470 lb/daY3 41 --- --- --- <br /> Total Coliform MPN/100ml --- 2.2" --- 23/2405 Nitrate(as N) mg/l 10 --- --- --- <br /> Turbidity NTU --- --- 26 5/10' lb/day' 820 --- --- --- <br /> Settleable Solids ml/l 0.1 --- --- 0.2 Nitrite(as N) mg/1 1 --- --- --- <br /> Chlorine Residual mg/1 --- 0.018 0.02 lb/days 82 --- --- --- <br /> Oil and Grease mg/1 10 --- --- 15 Bis(2-ethylhexyl) ug/l 22 --- --- 44 <br /> phthalate <br /> lb/day' 820 --- --- 1230 lb/day' 1.8 --- --- 3.6 <br /> Aluminum' ug/1 71 --- --- 140 <br /> Bromodichloromethane ug/1 5 --- --- 8 <br /> lb/day' 5.8 --_ <br /> _-- 12 lb/day' 0.41 --- --- 0.66 <br /> Electrical Conductivity umhos/cm 700 --- --- --- Dibromochloromethane ug/1 1.4 --- --- 2.8 <br /> (1 Aprilto31 August) <br /> Electrical Conductivity umhos/cm 1000 --- --- <br /> lb/day' 0.12 --- --- 0.23 <br /> (1 Sept to 31 March) Mercury ug/1 <br /> Ammonia(June-Sept) mg N/1 2.1 --- --- 4.4 lb/year 0.69 <br /> lb/day' 170 --- --- 360 2,4,6-Trichlorophenol ug/l 34 --- --- 69 <br /> Ammonia (Oct-May) mg N/1 2.8 --- --- 5.6 lb/day' 2.8 5.7 <br /> lb/day' 230 --- --- 460 1 5-day,20°C biochemical oxygen demand(BOD) <br /> Arsenic ug/1 10 --- --- --- 2 To be ascertained by a 24-hour composite <br /> s 3 Based upon a design treatment capacity of 9.87 mgd. <br /> lb/day 0.82 4 Weekly median <br /> Copper ug/1 7.9 --- --- 10.4 5 Does not exceed 23 in more than one sample in any 30-day period. No sample <br /> shall exceed 240. <br /> lb/day' 0.65 --- --- 0.86 6 Does not exceed an average of 2 NTU within a 24-hour period. <br /> 7 Does not exceed 5 NTU more than 5 percent of the time within a 24-hour period <br /> Cyanide ug/1 3.7 --- --- 10 and 10 NTU at any time. <br /> lb/day' 0.30 --- --- 0.82 8 Expressed as a 4-day average <br /> 9 The Discharger may conduct a water effect ratio study to develop a site-specific <br /> Iron ug/l 300 --- --- --- objective,and upon adoption and approval of a Basin Plan amendment,the permit <br />