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� J <br /> WASTE DISCHARGE REQUIREMENTS -25- <br /> CITY OF STOCKTON <br /> REGIONAL WASTEWATER CONTROL FACILITY <br /> SAN JOAQUIN COUNTY LATE REVISIONS <br /> 2. Effective immediately, effluent shall not exceed the following seasonal CBOD <br /> effluent limitations: <br /> Monthly Weekly Daily <br /> Constituents(Units) Average Average- Maximum Effective Dates <br /> CBOD(mg/1) (1) 10 20 25 1 April through 31 Oct <br /> (lbs/day)(2) 4,590 9,170 11,500 <br /> CBOD(mg/1)(1) 15 23 30 1 Nov through 30 Nov <br /> (lbs/day)(2) 6,880 10,600 13,800 <br /> CBOD(mg/1) (1) 20 30 50 1 Dec through 31 March <br /> (lbs/day) (2) 9,170 13,800 22,900 <br /> (1) 5-day,20°C,carbonaceous biochemical oxygen demand,ascertained by 24-hour composite. <br /> (2) Based on a permitted flow of 55 mgd. . <br /> 3. Effective immediately, effluent shall not exceed the following limitations: <br /> 1-Hour 4-Day <br /> Constituents(Units) Average Average <br /> Chlorine Residual(1119/1) 0.02 0.01 <br /> (lbs/day)(1) 4.6 <br /> (1)Based upon a permitted flow of 55 mgd. <br /> 4. Effective 1 January 2003, the Discharger shall maintain minimum daily average <br /> effluent DO concentration of 6.0 mg/1 from 1 September through 30 November and <br /> 5.0 mg/l throughout the remainder of year. <br /> 5. Effective 1 April 2007, the discharge shall not have a pH less than 6.5 nor greater <br /> than 8.5. Prior to 1 April 2007, the discharge shall not have a pH less than 6.0 nor <br /> greater than 8.5. Individual excursions below or above the prescribed minimum <br /> and maximum pH limitations shall not exceed 60 minutes,respectively. The total <br /> duration of excursions shall not exceed 1% of the discharge time within the <br /> reporting period. The Discharger shall conduct an internal review and report the <br /> reasons for any individual excursion exceeding 30 minutes in duration to the <br /> Regional Board within the self-monitoring report. <br /> 6. Interim effluent limits effective until 1 May 2006, when Title 22 <br /> filtration/disinfection is completed. The effluent shall not exceed the following <br /> limitations: <br /> Yearly Monthly Weekly Daily <br /> Constituents(Units) Total Averaee Average Maximum <br /> Total Coliform(MPN/loom]) 23 (median) 240 <br /> Copper(Rg/l) -- - <br /> - -- 1435 <br />