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WASTE DISCHARGE REQ MENTS ORDER NO. R5-2004-0021 -31- <br /> CITY OF MANTECA, CITYATHROP AND DUTRA FARMS <br /> WASTEWATER QUALITY CONTROL FACILITY <br /> SAN JOAQUIN COUNTY <br /> Monthly Weekly 1-Hour Daily <br /> Constituents Units Averaize Average Average Maximum <br /> Total Coliform MPN/100m1 --- 23° --- 500 <br /> Settleable Solids ml/1 0.1 --- --- 0.2 <br /> Chlorine Residual mg/1 --- 0.015 0.02 --- <br /> Oil and Grease mg/l 10 --- --- 15 <br /> Ib/day' 680 --- --- 1010 <br /> Aluminum' ug/I 71 — --- 140 <br /> Ib/day' 4.8 --- --- 9.5 <br /> Electrical Conductivity umhos/cm 700' <br /> (1 April to31 August) <br /> Electrical Conductivity umhos/cm 1000' --- --- --- <br /> (1 Sept to 31 March) <br /> Ammonia (June-Sept) mg N/1 2.1 --- --- 4.4 <br /> lb/day' 140 --- --- 300 <br /> Ammonia (Oct-May) mg N/1 2.8 --- --- 5.6 <br /> lb/day' 190 380 <br /> Arsenic ug/l 10 --- --- --- <br /> lb/day' 0.68 --- --- --- <br /> Copper u9/1 7.9 --- --- 10.4 <br /> lb/day' 0.53 --- 0.70 <br /> Cyanide ug/I 3.7 --- --- 10 <br /> lb/day' 0.25 --- --- 0.68 <br /> Iron ug/1 300 --- --- --- <br /> lb/day' 20 --- --- --- <br /> Manganese ug/1 50 --- --- --- <br /> lb/day' 3.4 --- --- --- <br /> Methylene blue active ug/1 500 ___ ___ --- <br /> substances(MEAS) <br /> lb/day' 34 --- --- --- <br />