Ontario the Regional Municipality of Durham 105 Consumers Drive, PO Box 623 Whitby, Ontario L1N 6A3
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CONTENT COPY OF ORIGINAL Ministry Ministère AMENDED CERTIFICATE OF APPROVAL of the de MUNICIPAL AND PRIVATE SEWAGE WORKS Environment l’Environnement NUMBER 3393-68RLD4 Ontario The Regional Municipality of Durham 105 Consumers Drive, PO Box 623 Whitby, Ontario L1N 6A3 Site Location: Courtice Water Pollution Control Plant Lots 26 Pt 4, 27 Pts 2 & 3, 28 Pts 1 & 2, Conc. BFC Clarington Municipality, Regional Municipality of Durham You have applied in accordance with Section 53 of the Ontario Water Resources Act for approval of: Establishment of an activated sludge type municipal sewage treatment plant, hereinafter called The Courtice Water Pollution Control Plant (WPCP), located at the above site location, rated at Phase-1 capacity mentioned below and consisting of the following Proposed Works; Courtice WPCP Rated Capacity Phase Average Daily Flow Peak Flow Rate (m3/d) (m3/d) 1 68,200 180,000 Ultimate 272,800 613,800 (To be constructed in phases) HARMONY CREEK PUMPING STATION A pumping station and a conveyance system consisting of the following components: • two (2) duplicate wet wells; • six (6) submersible pumps, five duty one standby, providing a firm pumping station capacity of 1,980 L/s with one forcemain in operation, each pump rated to deliver 396 L/sec against a TDH of approximately 40 m, and a firm pumping station capacity of 2,800 L/sec with two forcemains in operation, each pump rated at 560 L/s against a TDH of approximately 31 m; • one (1) 2,000 kW diesel generator set to provide back-up power; and • approximately 6,400 m of 1,050 mm diameter forcemain. COURTICE WATER POLLUTION CONTROL PLANT Headworks CONTENT COPY OF ORIGINAL A headworks building to house new screenings and grit removal equipment consisting of the following: • two (2) screens, one duty one standby, each rated to handle 184,000 m3/d flowrate and each with an aperture of 12 mm, with screenings washer/compactors and conveyors to discharge this material into a removable storage container; • two (2) aerated grit removal tanks, each having a volume of 250 m3 providing a detention time of 10.6 minutes at Average Daily Flow and 4 minutes at Peak Flow Rate; • three (3) grit air blowers (2 duty, 1 standby); • one (1) channel aeration blower; • two (2) grit pumps, one per aerated grit tank, to pump the grit slurry to the grit classifier; and • one (1) grit classifier with two (2) cyclones, as well as grit conveyance systems to discharge this material into a temporary storage bin. Primary Treatment Primary treatment consisting of the following components: • two (2) rectangular primary settling tanks, each measuring 50 m x 24 m and each providing a surface area of 1,160 m2 with total effective surface area of 2,320 m2; and • four (4) primary sludge pumps, one duty one standby for each train, and each rated to deliver 50 m3/hr against a TDH of approximately 25 m. Biological Treatment Secondary biological treatment consisting of the following works: • two (2) bioreactor tanks, each measuring 136 m x 24 m x 5.5 m SWD to provide an anoxic zone volume of 1,920 m3 and an aerobic zone volume of 16,780 m3 equipped with fine bubble aeration facilities; and • four (4) multistage centrifugal blowers (3 duty, 1 standby), each rated at 8,080 Sm3/hr. Final Clarifiers Final clarification facilities consisting of the following: • two (2) rectangular final clarifiers, each measuring 120 m x 24 m and each having a surface area of 2,808 m2 for a total surface area of 5,616 m2; • four (4) return activated sludge pumps (1 duty, 1 standby per train), each rated at a capacity of 35,000 m3/d against a TDH of approximately 10 m; and • four (4) waste activated sludge pumps (1 duty, 1 standby per train), each rated at a capacity of 125 m3/hr against a TDH of approximately 33 m. Phosphorus Removal Phosphorus removal facility comprising of the following: • two (2) phosphorous removal chemical storage tanks, each with an nominal working volume of approximately 50 m3; and • three (3) phosphorous removal chemical metering pumps, each with a capacity range of approximately 40 to 600 L/hr. CONTENT COPY OF ORIGINAL Effluent Disinfection An effluent disinfection system using chlorination/dechlorination mechanisms and consisting of the following: • a contact tank divided into two (2) tanks with a total working volume of 2,130 m3 (1,880 m3 and 250 m3 allocated for chlorination and dechlorination, respectively); • two (2) chlorination chemical storage tanks, each with a nominal working volume of approximately 40 m3; • three (3) disinfection chlorination chemical metering pumps, each having a capacity range of approximately 16 to 600 L/hr; • two (2) dechlorination chemical storage tanks, each having a nominal working volume of approximately 7 m3; and • two (2) dechlorination chemical metering pumps, each having a capacity range of approximately 3 to 85 L/hr. Anaerobic Digestion Anaerobic digestion facilities consisting of the following components: • two (2) mesophilic anaerobic digesters, each measuring 33.5 m in diameter x 10 m SWD and each providing a volume of approximately 8,000 m3; • four (4) sludge recirculation pumps, each having a capacity of 180 m3/hr; and • two (2) sludge transfer pumps, each having a capacity of 250 m3/hr. Biosolids Storage Three (3) biosolids decanting cells, each having a capacity of 2,700 m3, and two (2) sludge storage tanks, each having a capacity of 950 m3 for a total storage capacity of 10,000 m3. Outfall An effluent outfall facility rated to convey the Phase 2 design peak flow of 408,000 m3/d and comprising of the following components: • approximately 770 m of 1,676 mm diameter outfall pipe; and • approximately 180 m long diffuser section beginning at the end of 1,676 mm diameter outfall pipe reducing to 762 mm diameter over the length, and consisting of forty-five (45) 120 mm staged diffuser ports. Standby Power One (1) 1500 kW standby diesel generator set. Buildings Buildings include the following: • an administration building to house administration offices, library, laboratory, workshop and staff quarters; and • an energy building to house digester gas room, boilers, standby generator set and main electrical switch gear. Miscellaneous All controls and sensors, electrical equipment, instrumentation, heating and ventilation, metal works, piping, pumps, valves and appurtenances essential for the proper operation of the aforementioned Works. CONTENT COPY OF ORIGINAL all in accordance with the following supporting documents: 1. Application for Approval of Municipal and Private Sewage Works submitted by the Regional Municipality of Durham dated January 02, 2004 under a cover letter of CH2M Hill Canada Limited dated January 14, 2004 (received January 29, 2004) including pre-design data and preliminary drawings all prepared by Team Courtice (CH2M HILL Canada Limited, MacViro Consultants Inc. and Simcoe Engineering Group Limited) and R.V. Anderson and Associates, Consulting Engineers dated January 2004. 2. Application for Approval of Municipal and Private Sewage Works submitted by the Regional Municipality of Durham dated December 09, 2004 under a cover letter of Team Courtice dated December 10, 2004 (received January 11, 2005) supported by the following documents: i) A copy of Draft Revised Design Development Report titled "Courtice WPCP Harmony Creek Sewage Pumping Station" dated November 2004 prepared by Earth Tech Canada Inc.: ii) A 4-volume set of Tender Documents (Volumes 1-4 of 9) dated November 2004 prepared by Team Courtice (CH2M HILL Canada Limited, MacViro Consultants Inc. and Simcoe Engineering Group Limited): and, iii) A 5-volume set of detailed drawings (Volumes 5-9 of 9) dated November 2004 prepared by Team Courtice (CH2M HILL Canada Limited, MacViro Consultants Inc. and Simcoe Engineering Group Limited). For the purpose of this Certificate of Approval and the terms and conditions specified below, the following definitions apply: “Act” means the Ontario Water Resources Act, R.S.O. 1990, Chapter 0.40, as amended; "Average Daily Flow" means the cumulative total sewage flow to the sewage works during a calendar year divided by the number of days during which sewage was flowing to the sewage works that year; “By-pass” means any discharge from the Works that does not undergo any treatment or only undergoes partial treatment before it is discharged to the environment; "BOD5" means five day biochemical oxygen demand measured in an unfiltered sample; "CBOD5" means five day carbonaceous (nitrification inhibited) biochemical oxygen demand measured in an unfiltered sample; "Certificate" means this entire certificate of approval document, issued in accordance with Section 53 of the Act, and includes any schedules; "Daily Concentration" means the concentration of a contaminant in the effluent discharged over any single day, as measured by a composite or grab sample, whichever is required; "Director" means any Ministry employee appointed by the Minister pursuant to section 5 of the Act; "District Manager" means the District Manager of the York-Durham District Office of the Ministry; "E. Coli" refers to the thermally tolerant forms of Escherichia that can survive at 44.5 degrees Celsius; "Geometric Mean Density" is the nth root of the product of multiplication of the results of n number of samples over the period specified; "Ministry" means the Ontario Ministry of the Environment; CONTENT COPY OF ORIGINAL "Monthly Average Concentration" means the arithmetic mean of all Daily Concentrations of a contaminant in the effluent sampled or measured, or both, during a calendar