Ailsa Craig Wastewater Treatment Plant Operations Report 2017 THIRD QUARTER

Transcription

1 Ailsa Craig Wastewater Treatment Plant Operations Report 2017 THIRD QUARTER Submitted by: Ontario Clean Water Agency Date: July 1 September 30, 2017 Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 1

2 Facility Description Facility Name: Ailsa Craig Wastewater Treatment Plant & Collection System Senior Operations Manager: Rod Dupuis Business Development Manager: Jackie Muller Facility Type: Municipal Classification: Class 2 Wastewater Treatment / Class 2 Wastewater Collection Title Holder: Municipality Service Information Area(s) Serviced: Village of Ailsa Craig Population Serviced: 947 Capacity Information Total Design Capacity: 1,210 (m 3 /day) Total Annual Flow (2016 Data): 239, (m 3 /year) Average Day Flow (2016 Data): (m 3 /day) Maximum Day Flow (2016 Data): 2, (m 3 /day) Operational Description Pump Stations/Headworks: There are three pump stations on the collection system. The stations are named Bear Creek, New Ontario, and William Street and they operate in series in the order named above. The line from Bear Creek to New Ontario is a forcemain and the line from New Ontario to William Street is a gravity line. The only station connected directly to the Ailsa Craig STP is the William Street station. The station in Nairn is called Bear Creek Pump Station. The headworks of the plant include an automatic bar screen, with a manual screen in case of failure of the automatic one, and a vortex grit removal chamber. Grit and screened material is dumped in a bin for disposal at landfill. An automatic refrigerated sampler is located at the headworks for collection and analysis of raw sewage samples. A diesel backup power generator is available to supply power to all major functions of the plant, and also William Street Pumping Station. There is a 200 gallon tank and a 500 gallon tank for fuel supply. The 200 gallon tank is located indoors and is set in a concrete bermed secondary containment area. The 500 gallon tank is located outdoors, is above ground and is double walled. Treatment Works: The works consist of two aeration tanks arrange in parallel with three blowers and two clarifiers, also in parallel. Effluent from the clarifiers goes to a separate building housing the sand filter and UV disinfection. It should be noted that there is an extra chamber present which can accommodate the works for additional filtration, however, it is not needed at this time. The filter is a travelling bridge automatic backwash sand filter. Backwash is directed to the head of the plant for treatment. An automatic refrigerated sampler is located in the filter building as well. Chemical addition/sludge handling: The only chemical added at the plant is alum which is used for phosphorus control. Alum is added at the head of the aeration chamber, and can be added if needed at the head of the filters. Most chemical is added at the aeration chamber. Chlorine is also trickled into the raw sewage overflows at the pump station if possible, in the event that there is a process issue. Sludge is aerated alternately in one of two aerobic digesters then decanted before pumping into the 2100 m3 sludge storage tank. Septage Receiving: Ailsa Craig has an automated septage receiving station. The receiving station is part of the front end of the plant. Electronic card access for 24 hour dumping is available; however at present all septage dumping is supervised by the plant operators. If the high level switch on the storage tank is tripped, the system is locked and will not accept septage to be deposited by the hauler. Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 2

3 COMPLIANCE AND EXCEEDANCES SUMMARY: Any regulatory Certificate of Approval exceedances are listed below. FIRST QUARTER The daily rated capacity of 1,210 m³ was exceeded on the following days identified below. The peak flow rate compliance value of 4,030 m³/ day was not exceeded; first quarter flow values were compliant. January The daily rated capacity was exceeded due to large amounts of rain and snow melt on the following days: January 12 th 1, m3 January 13 th 1, m3 March The rated capacity was surpassed on four occasions due to heavy rain falls on the following days: March 1 st 2, m3 March 2 nd 1, m3 March 3 rd 1, m3 March 31 st 1,273 m3 Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 3

4 SECOND QUARTER The daily rated capacity of 1,210 m³ was exceeded on the following days identified below. The peak flow rate compliance value of 4,030 m³/ day was not exceeded; second quarter flow values were compliant. April The daily rated capacity was exceeded due to large amounts of rain fall on the following days: April 6 th 1, m3 April 7 th 1, m3 April 8 th 1, m3 April 21 st 1, m3 May The daily rated capacity was exceeded due to large amounts of rain fall on the following days: May 5 th 2, m3 May 6 th 2, m3 May 7 th 1, m3 Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 4

5 THIRD QUARTER The daily rated capacity of 1,210 m³ was not exceeded in the third quarter. Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 5

6 BY-PASSING EVENTS: FIRST QUARTER William Street Pump Station By-pass: January 12th 2017 On Thursday January 12th 2017 a William Street Pumping Station bypass occurred; approximately m³ raw sewage entered the Ausable River. The William Street Pumping Station bypass started at approximately 01:19 AM on January 12th 2017 and ended at approximately 05:30 AM on January 12th 2017; the William Pumping Station bypassed for approximately 4 hours & 11 minutes. Bypass samples were collected as regulated. The Spills Action Centre was notified of the bypassing event. This bypassing event occurred due to heavy rainfall in the area. William Street Pump Station By-pass: March 1st 2017 On March 1st 2017 a William Street Pumping Station bypass occurred; approximately 95 m³ raw sewage entered the Ausable River. The William Street Pumping Station bypass started at approximately 03:00 a.m. March 1st 2017 and ended at approximately 12:00 p.m. (noon) on March 1st 2017; the William Pumping Station bypassed for approximately 9 hours. Bypass samples were collected as regulated. The Spills Action Centre was notified of the bypassing event. This bypassing event occurred due to heavy rainfall in the area. SECOND QUARTER Bear Creek Wet Well By-pass: April 15, 2017 On April 15th, 2017 at 09:05 AM the North Middlesex OCWA On Call Operator received a phone call from a private citizen, reporting a possible water weak adjacent to the Bear Creek Pump Station. The On Call Operator arrived on site at the Bear Creek Pump Station located in the Municipality of North Middlesex, Petty Street at 09:12 AM; upon arrival the Operator noticed liquid seeping up round a manhole. The Bear Creek Pump Station pumps were not operating; Operator started the pumps, the wet well was pumped down and the bypass stopped. The Bear Creek Pump Station Bypass Event was reported to the Spill Action Centre as required. The raw sewage bypass at the Bear Creek Pump Station occurred for approximately less than half an hour; volume bypassed is unknown & no raw sewage entered the adjacent creek. William Street Pump Station By-pass: May 5, 2017 The North Middlesex On Call Operator notified the PCT that the Ailsa Craig WPCP William Street Pump Station (WW# ) was bypassing due to very heavy precipitation in the area. The William Street Pump Station began bypassing at approximately 16:10 May 5th 2017 & ended at approximately 03:00 May 6th The pump station bypassed for approximately 11 hours. The Spills Action Centre was notified as required. The Ailsa Craig William Street Pump Station bypassed approximately 373 m³ of raw sewage into the Ausable River over approximately an eleven hour period from May 5th to May 6th Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 6

7 Bear Creek Wet Wetll By-pass: June 4, 2017 On June 4th, 2017 at 15:52 the North Middlesex OCWA On Call Operator received a phone call from a private citizen adjacent to the Bear Creek Pump Station located in the Municipality of North Middlesex at Petty Street, reporting liquid coming from around a manhole near the Pump Station. The On Call Operator arrived on site at the Bear Creek Pump Station at 16:15; upon arrival the Operator immediately notice that the pumps were not operating. The On Call Operator tuned the pumps to hand; pumps operated and the raw sewage spill was stopped. Raw sewage bypassed treatment and spilled on to the grass for approximately 25 minutes; no volume of spilled material could be determined. The Spills Action Centre was notified as required. The On-Call Operator reset the Bear Creek Pump Station PLC system; returned the pumps to auto and remained on site to monitor through a complete cycle of pump operation; the pumps operated as designed. OCCUPATIONAL HEALTH & SAFETY: FIRST QUARTER There were no occupational health and safety issues identified in the first quarter. SECOND QUARTER There were no occupational health and safety issues identified in the second quarter. THIRD QUARTER There were no occupational health and safety issues identified in the third quarter. THIRD PARTY INSPECTIONS: FIRST QUARTER March 21 Pierce Services Equipment calibration and verification SECOND QUARTER April 12 Hetek Semi-annual calibration and inspection of handheld detection equipment April 19 Mobile Fire and Safety Annual inspection of fire extinguishers THIRD QUARTER There were no third party inspections in the third quarter. GENERAL MAINTENANCE AND PLANT ACTIVITIES: General maintenance includes monthly generator tests, greasing equipment and preventative maintenance. The wet wells are cleaned out on a bi-weekly basis. Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 7

8 FIRST QUARTER January 17 Konecranes was onsite to complete the annual inspection of all lifting devices January 17 CT Environmental was onsite at 172 Queen Street, Ailsa Craig and 116 James Street, Ailsa Craig, to flush and camera sanitary service. It was noted a plug was wedged in the pipe causing the backup at 172 Queen Street. At 116 James Street, there was a blockage that formed back in the fall. Operators were unable to retrieve the blockage, but did relocate to improve flow. Video of service was given to the Municipality by CT Environmental. January 23 CT Environmental was onsite at 172 Queen Street to move the blockage to a location where the Municipality was then able to dig and remove the plug. February 9 Selectra was onsite at the Ailsa Craig WPCP to remove the temporary alarm system and install the new verbatim. March 3 OCWA Electrician was onsite to assist with replacing the Auma drive on the wasting valve due to it not working in auto. The cause was that the motor is burnt out and was replaced with one we had in stock. March 4 OCWA Electrician was onsite to replace the batteries in the UPS system. March 21 Greg Pierce was onsite to calibrate all the Milltronics and flow meters at all the sites March 23 OCWA Health & Safety representation was on site at both Reservoirs and Booster Station to complete in house Health and Safety Inspection. SECOND QUARTER April Operators performed frequent checks at the Bear Creek wet well due to PLC faulting that was occurring. April 18 OCWA Electrician was onsite at Bear Creek wet well to review the reoccurring PLC fault. It was suggested to move the transformer outside of the control panel box, due to the heat being produced could be causing the PLC to go into fault. April 19 Selectra onsite at Bear Creek wet well to review reoccurring PLC fault. They will be providing a quote to replace the PLC panel. May 1 9 Operators performed frequent checks at the Bear Creek wet well due to PLC faulting that was occurring. May 9 OCWA Electrician was onsite at Bear Creek wet well to install a fan and louver system to keep the PLC panel area cool. May 24 CT Environmental onsite at Bear Creek wet well, New Ontario wet well and William Street pumping station to perform annual spring cleaning, including the air relief chambers. Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 8

9 While performing the annual cleaning, operators tested float system, high and low level alarms and performed semi-annual testing of air reliefs. June 1 Toromont onsite investigating why the generator was constantly running. It was discovered that only 2 of the 3 phases of hydro were coming into the plant causing the generator to run. Hydro One was called; upon arrival they replaced the blown breaking allowing all 3 phases of Hydro to enter the plant. June 1 & 2 OCWA Electrician onsite at the Ailsa Craig WPCP to install a new electrical power cord to the skimmer pump on the travelling bridge. OCWA Electrician also replaced emergency lights as per the annual health and safety report. June 6 OCWA Electrician onsite at Bear Creek wet well to investigate PLC failure on June 4 th. It was noted there were four (4) faulty intrinsic safety relays causing the backup/float mode to not work properly. System was temporarily wired to bypass allowing the relays to work properly. June 16 Operator onsite at Bear Creek wet well with OCWA IT to investigate PLC failure. It was noted there was an Ethernet issue causing the failure. June 16 Operator installed a new weather seal around the cooling/heating system. June 22 Operator noticed the travelling bridge was not working properly between cells. Operators were required to move the travelling bridge manually until June 27 th. June 27 OCWA Electrician onsite at the Ailsa Craig WPCP to repair the travelling bridge. A faulty switch was found and replaced. The bridge was back to regular operation. THIRD QUARTER July 4 Bear Creek wet well Operator installed a new line from the PLC to the control panel to try and resolve PLC faults/alarms. This did not work. Further investigation required. July 17 Bear Creek wet well Operator assisted OCWA IT Support Services in changing the communications from an Ethernet cord to a serial cord system. This change over worked resulting in no fault/alarms being received. July 20 Ailsa Craig WPCP Operators removed RAS pump #1 due to fault. The pump was plugged with rags. Operators unplugged the pump, cleaned, performed an inspection and returned to working order. July 20 Operators took clarifier #1 out of service during low flows and will return into service when flows increase. August 14 Ailsa Craig WPCP OCWA Electrician onsite troubleshoot a minor fault issue with aeration blower #3. It was determined the control transformer fuse needed to be replaced. Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 9

10 PREVENTATIVE MAINTENANCE WORK ORDERS GENERATED JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TOTAL All work orders completed on schedule. ALARMS / CALL-INS: FIRST QUARTER January 4 Operator received a low level alarm from Bear Creek wet well. Operator waited 15 minutes, and called the verbatim alarm had reset itself. January 12 Operator received a high level alarm at William Street wet well. Upon arrival, operator noticed the wet well at a high level and started bypassing. All proper agencies were notified by OCWA PCT. It was reported that m3 was bypassed. January 13 Operator received a high level alarm at William Street wet well. Operator had to perform a by-pass due to large amount of rainfall. January 15 Operator received a call from a resident at 172 Queen Street, that there was a sanitary service backup. The resident advised the operator that the service was not completely plugged that sewage was slowly going away. Operator was unable to find the sanitary service clean out at the property line due to the gravel driveway being froze over. During regular business hours on January 17 th, CT Environmental was onsite to assist with finding the clean out and flushing the service. February 12 Operator received a clarifier #1 and #2 overload alarm. Operator arrived onsite, checked the entire plant and determined the alarm was due to a hydro outage. March 1 Operator received an overflow alarm from William Street wet well. Operator arrived onsite and determined a bypass situation was occurring. It was reported that 95 m3 was bypassed. All proper agencies were notified by OCWA. March 25 Operator received a high level alarm from Bear Creek wet well. Operator arrived on site and noticed the PLC was faulted causing the alarm. Operator reset the PLC and documented the event. SECOND QUARTER April 6 Operator received hydro outage alarm from the Ailsa Craig WPCP. Operator acknowledged alarm, arrived onsite and all operations were normal. April 15 Operator received a call from a resident south of Bear Creek wet well stating there is a possible water leak in the area. Upon arrival, the operator determined it wasn t a leak, but it Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 10

11 was a sewage bypass due to a malfunction. Operator contacted all proper authorities, collected and delivered samples to SGS labs. The PLC panel was in fault, not giving proper instructions for the pumps to turn on and off, alarming out a high level. PLC panel was reset and was monitored on a regular basis until a new panel is installed. April 18 Operator received a high level alarm from Bear Creek wet well. Upon arrival, operator determined the PLC panel was in fault. Operator reset the panel, all okay. April 20 Operator received high level alarm from William Street wet well. This was caused by a large amount of rainfall earlier in the day. The wet well did not bypass, however the operator did monitor to ensure it did not bypass. Alarm was acknowledged and SCADA system was checked to ensure there was not a bypass event. May 5 Operator was onsite to check William Street wet well due to bypassing. May 6 Operator was onsite to check William Street wet well due to bypassing, collected samples and delivered to SGS lab in London. May 20 Operator received several alarm from the Ailsa Craig WPCP due to hydro outage. Upon arrival both clarifiers, aeration blower #1, digester blowers, scum pump, supernate pump and UV system were reset. After resetting all faults, equipment resumed normal functions. June 1 Operator received hydro outage alarm from the Ailsa Craig WPCP. Operator arrived onsite and observed all essential equipment was operating properly. The generator was also running, Toromont was called to check the reasoning. June 4 Operator received a call from a resident adjacent to the Bear Creek Pumping Station reporting liquid coming from around a manhole near the Pump Station. Operator was onsite and noticed no pumps were running and a bypass was occurring. The pumps were not running and the verbatim was not alarming due to the PLC being in fault. Samples of raw sewage were collected and sent to SGS June 5 th. June 8 Operator received a high level alarm from Bear Creek wet well. Operator was onsite and the wet well was not bypassing. The PLC was in fault, but the backup/float mode was working allowing the pumps to run. Operator reset PLC all okay. June 10 Operator received two alarms from Bear Creek wet well. Operator arrived on site for both alarms and the PLC was in fault, but the backup/float mode was working allowing the pumps to run. Operator reset PLC after the first alarm all okay. After the second alarm, it was decided to turn the PLC off and let the pumps run in backup/float mode all okay. THIRD QUARTER July 18 Operator received multiple alarms from the Ailsa Craig WPCP due to a hydro outage. Upon arrival, the operator noticed that all areas had power, but the plant generators were running. Operator investigated the main pole switch and it was determined to have three phases of hydro. Hydro One was called to turn the power off to the plant. Toromont was onsite Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 11

12 the following morning and determined there was a malfunction with the master change over switch. Toromont corrected the issue. August 7 Operator received an alarm from the William Street Sewage Pumping Station power failure alarm. The alarm immediately returned to normal. The operator waited 15 minutes and called back. At the time it stated all was normal, operator acknowledged the alarm remotely. The reason for the alarm is unknown. September 7 Operator received a low level alarm from the New Ontario wet well. When the operator arrived onsite, the wet well level was reading 1.47m which is not a low level. It was noticed the pumps would not turn on to lower the wet well level. Operator called CT Environmental as backup, and OCWA Electrician to investigate the problem. It was found the ISR relay was faulty, not allowing the pumps to turn on or cycle properly. The ISR relay was bypassed to allow pumps to turn on. A new ISR relay was ordered to fix the issue. COMPLAINTS & CONCERNS: FIRST QUARTER There were no complaints or concerns reported in the first quarter. SECOND QUARTER There were no complaints or concerns reported in the second quarter. THIRD QUARTER There were no complaints or concerns reported in the third quarter. REGULATORY INSPECTIONS: The last MOECC Inspection occurred on November 25, APPENDIX A PERFORMANCE ASSESSMENT REPORT: See attached. Ailsa Craig Wastewater Treatment Plant and Collection System Operations Report 2017 Page 12

13 APPENDIX A PERFORMANCE ASSESSMENT REPORT

14 Ontario Clean Water Agency Performance Assessment Report Wastewater/Lagoon From: 01/01/2017 to 30/09/2017 Facility: [5848] AILSA CRAIG WASTEWATER TREATMENT FACILITY Works: [ ] 01/ / / / / / / / /2017 <--Total--> <--Avg.--> <--Max.--> <--Criteria--> Flows: Raw Flow: Total - Raw Sewage (m³) Raw Flow: Avg - Raw Sewage (m³/d) Raw Flow: Max - Raw Sewage (m³/d) Eff. Flow: Total - Final Effluent (m³) Eff. Flow: Avg - Final Effluent (m³/d) Eff. Flow: Max - Final Effluent (m³/d) Carbonaceous Biochemical Oxygen Demand: CBOD: Eff: Avg cbod5 - Final Effluent (mg/l) < < < < < < < < < < < Eff: # of samples of cbod5 - Final Effluent (mg/l) Loading: cbod5 - Final Effluent (kg/d) < < < < < < < < < < < Biochemical Oxygen Demand: BOD5: Raw: Avg BOD5 - Raw Sewage (mg/l) Raw: # of samples of BOD5 - Raw Sewage (mg/l) Total Suspended Solids: TSS: Raw: Avg TSS - Raw Sewage (mg/l) Raw: # of samples of TSS - Raw Sewage (mg/l) Eff: Avg TSS - Final Effluent (mg/l) < < < < < < < < < < < Eff: # of samples of TSS - Final Effluent (mg/l) Loading: TSS - Final Effluent (kg/d) < < < < < < < < < < < Percent Removal: TSS - Raw Sewage (mg/l) Total Phosphorus: TP: Raw: Avg TP - Raw Sewage (mg/l) Raw: # of samples of TP - Raw Sewage (mg/l) Eff: Avg TP - Final Effluent (mg/l) < < Eff: # of samples of TP - Final Effluent (mg/l) Loading: TP - Final Effluent (kg/d) < < Percent Removal: TP - Raw Sewage (mg/l) Nitrogen Series: Raw: Avg TKN - Raw Sewage (mg/l) Raw: # of samples of TKN - Raw Sewage (mg/l) Eff: Avg TAN - Final Effluent (mg/l) < < < < < < < < < < < Eff: # of samples of TAN - Final Effluent (mg/l) Loading: TAN - Final Effluent (kg/d) < < < < < < < < < < < Disinfection: Eff: GMD E. Coli - Final Effluent (cfu/100ml) Eff: # of samples of E. Coli - Final Effluent (cfu/100ml)