2017 performance report for bobcaygeon waste water ... · 2017 performance report for bobcaygeon...

2017 Performance Report for Bobcaygeon Waste Water Treatment Facility

Amended Environmental Certificate of Approval (ECA) #3028-AEUKDQ Section 11(4) requires the Performance Reports to contain the following:

a) a summary and interpretation of all monitoring data and a comparison to the Final Effluent limits outlined in Compliance Limits condition, including an overview of the success and adequacy of the Works;

b) a description of any operating problems encountered and corrective actions taken;

c) a summary of all maintenance carried out on any major structure, equipment, apparatus, mechanism or thing forming part of the Works;

d) a summary of any effluent quality assurance or control measures undertaken in the reporting period;

e) a summary of the calibration and maintenance carried out on all effluent

monitoring equipment;

f) a description of efforts made and results achieved in meeting the Design Objectives of Condition 6;

g) a tabulation of the volume of sludge generated in the reporting period, an outline of anticipated volumes to be generated in the next reporting period and a summary of the locations to where the sludge was disposed;

h) a summary of any complaints received during the reporting period and any steps taken to address the complaints;

i) a summary of all By-pass, spill or abnormal discharge events;

j) a copy of all Notice of Modifications submitted to the Water Supervisor as a result of Schedule B, Section 1, with a status report on the implementation of each modification;

k) a report summarizing all modifications completed as a result of Schedule B,

Section 3; and

l) any other information the Water Supervisor requires from time to time; and

(ECA) #3028-AEUKDQ Section 6(3)

The Owner shall make an assessment of the issues and recommendation of pro-active

actions if any is required under the following situations and include in the annual report

to the Water Supervisor:

a. when any of the design objectives is not achieved consistently; · b. when the Annual Average Daily Flow reaches 80% of the Rated Capacity. The following is a report from the records maintained by the Ontario Clean Water

Agency for the Bobcaygeon WWTP for the calendar year 2017:

(a) Attached as Appendix I is a copy of the 2017 Performance Assessment Report (PAR) and loading calculations for the Bobcaygeon WWTP for the facility combined final effluent. The PAR contains: a tabulation of all monthly average raw sewage and final effluent sample results obtained during the reporting period, a tabulation of average daily flows, and monthly volumes for the reporting period, and a tabulation of calculated total loading of BOD/CBOD5, suspended solids, total phosphorus, and ammonia + ammonium as N concentrations in the final effluent.

Overall, the plant process ran well in 2017. The following table summarizes the monthly effluent quality results in comparison to the effluent limits Condition 7 of Certificate of Approval #3028-AEUKDQ and Condition of Environmental Certificate of Approval (ECA) #3028-AEUKDQ (issued April 10, 2017). The Bobcaygeon WWTP has a Rated Capacity of 3,055 m3/day and a Peak Capacity of 10 440 m3/day. The total final effluent flow was 1,156,975.60m3. The average daily flow was 3,169.8 which is 103.8% of the rated capacity.

A sanitary sewer flow monitoring study was completed by Civica in 2015 and identified several areas where excess I&I flow is coming into the collection system (i.e. Infiltration – joints, cracks, manhole covers, etc., sump pumps, storm drain tie-ins, etc. By isolating and addressing/maintaining the main areas of concern, the number of high flow events and the flow peaking factor to the WWTP will be reduced, which will have a positive impact on the current plant process on and will defer future plant expansion/major capital upgrades and the associated costs.

OCWA initiated a Facility Optimization Program (FOP) in 2017 for the Bobcaygeon WWTP. Through the FOP, a comprehensive review of plant performance was conducted. This report provides details of the program and key findings through review of background information, plant treatment performance and capacity evaluation to establish opportunities for improved plant operations. To evaluate the impact of inflow and infiltration (I&I) on the influent flows to the plant, the historical flow data was analyzed. Over a 36-month period, the average influent flow to the facility increased by 50% and the average flow exceeded the rated design capacity of 3,055 m3/d in 2017 by 5%. The influent concentrations became more dilute on average over the 36 month

period. The increased flows and decreased organic loading is an indicator of significant I&I into the collection system.

Precipitation data from 2017 from the Environment Canada for the weather station nearest to Bobcaygeon (Peterborough, ON) was analyzed in to determine if there was a correlation between higher precipitation and higher flows to the plant.

The correlation between the periods of high influent flow and high precipitation amounts is strong, particularly in the spring season. A peak in the precipitation trend is immediately followed by a peak in the influent flow to the plant.

OCWA will continue ongoing efforts to work in partnership with the City of Kawartha Lakes to reduce flows to the wastewater treatment plant.

Final Effluent by Month

Month Average Daily Flow

(m3)

Maximum Daily Flow

(m3)

Monthly Flow (m3)

January 2,764.652 3,399.000 85,704.20

February 2,743.500 4,255.000 76,818.00

March 3,962.516 5,051.000 122,838.00

April 4,120.667 5,632.000 123,620.00

May 4,647.129 6,270.000 144,061.00

June 3,664.333 4,276.000 109,930.00

July 3,700.939 4,652.000 114,729.10

August 2,662.687 3,306.000 82,543.30

September 2,270.800 2,739.000 68,124.00

October 2,378.806 3,026.000 73,743.00

November 2,692.167 3,408.000 80,765.00

December 2,390.323 2,633.000 74100.00

Total -- -- 1,156,975.60

ECA #3028-AEUKDQ (issued April 10, 2017) Condition 9(3) describes the requirement for sample collection at the following locations, frequencies and by means of the specified sample type and analyzed for each parameter listed and all results recorded: Influent Sampling Point

Parameters Sample Type Frequency

BOD5 Composite Monthly

Total Suspended Solids Composite Monthly

Total Phosphorus Composite Monthly

Total Kjeldahl Nitrogen Composite Monthly

Final Effluent Sampling Point

Parameters Sample Type Frequency

CBOD5 Composite Weekly

Total Suspended Solids Composite Weekly

Total Phosphorus Composite Weekly

Total Ammonia Nitrogen Composite Weekly

E. coli Grab Weekly

pH Grab Weekly

Temperature Grab Weekly

Acute Lethality to Rainbow Trout and Daphnia magna

Grab Quarterly

Effluent Parameter Summary

Carbonaceous Biochemical Oxygen Demand (CBOD5) ECA #3028-AEUKDQ sets the CBOD5 monthly average concentration limit at 25.0

mg/L and the monthly average waste loading at 76.4 kg/day.

Carbonaceous Biochemical Oxygen Demand (CBOD5)

Monthly Average

Average Concentra

tion (mg/L)

Concentration Limit (mg/L)

Compliance Limit

Achieved

Average

Waste Loadin

g (kg/day

)

Loading Limit (kg/day

)

Compliance Limit

Achieved

January 2.60 25.0 Yes 7.19 76.4 Yes

February 3.50 25.0 Yes 9.60 76.4 Yes

March 7.00 25.0 Yes 27.74 76.4 Yes

April 5.75 25.0 Yes 23.69 76.4 Yes

May 4.25 25.0 Yes 19.75 76.4 Yes

June 3.20 25.0 Yes 11.73 76.4 Yes

July 2.50 25.0 Yes 9.25 76.4 Yes

August 3.20 25.0 Yes 8.52 76.4 Yes

September 3.25 25.0 Yes 7.38 76.4 Yes

October 2.20 25.0 Yes 5.23 76.4 Yes

November 3.50 25.0 Yes 9.42 76.4 Yes

December 4.50 25.0 Yes 10.76 76.4 Yes

Total Suspended Solids (TSS) ECA #3028-AEUKDQ sets the TSS annual monthly concentration limit at 25.0 mg/L

and the monthly average waste loading at 76.4 kg/day.

Total Suspended Solids (TSS)

Month Average Concentration

(mg/L)

Concentration Limit

(mg/L)

Compliance Limit

Achieved

Average Waste

Loading (kg/day)

Loading Limit

(kg/day)

Compliance Limit

Achieved

January 10.20 25.0 Yes 28.20 76.4 Yes

February 9.25 25.0 Yes 25.38 76.4 Yes

March 28.00 25.0 No 110.95 76.4 No

April 15.75 25.0 Yes 64.90 76.4 Yes

May 13.75 25.0 Yes 63.90 76.4 Yes

June 10.60 25.0 Yes 38.84 76.4 Yes

July 9.00 25.0 Yes 33.31 76.4 Yes

August 9.40 25.0 Yes 25.03 76.4 Yes


October 6.80 25.0 Yes 16.18 76.4 Yes

November 9.75 25.0 Yes 26.25 76.4 Yes

December 9.00 25.0 Yes 21.51 76.4 Yes

The March Total Suspended Solids concentration limit and loading limit exceedance was verbally reported to the Ministry of the Environment and Climate Change – Peterborough District Office on April 4, 2017 and in writing on April 11, 2017.

Total Phosphorus (TP) ECA #3028-AEUKDQ sets the TP annual monthly concentration limit at 1.0 mg/L and

the monthly average waste loading at 1.3 kg/day.

Total Phosphorus (TP)


(mg/L)

Concentration Limit

(mg/L)

Compliance Limit

Achieved

Average Waste

Loading (kg/day)

Loading Limit

(kg/day)

Compliance Limit

Achieved

January 0.08 1.0 Yes 0.23 1.3* See below

February 0.08 1.0 Yes 0.22 1.3* See below

March 0.16 1.0 Yes 0.65 1.3* See below

April 0.10 1.0 Yes 0.43 1.3 Yes

May 0.10 1.0 Yes 0.44 1.3 Yes

June 0.09 1.0 Yes 0.33 1.3 Yes

July 0.10 1.0 Yes 0.37 1.3 Yes

August 0.10 1.0 Yes 0.27 1.3 Yes


October 0.08 1.0 Yes 0.20 1.3 Yes

November 0.09 1.0 Yes 0.24 1.3 Yes


(mg/L)

Concentration Limit

(mg/L)

Compliance Limit

Achieved

Average Waste

Loading (kg/day)

Loading Limit

(kg/day)

Compliance Limit

Achieved

December 0.08 1.0 Yes 0.20 1.3 Yes

* Certificate of Approval 5435-6H5JNM Condition 7(2)(b) indicates: For Average Daily Flows in excess of 1,300 cubic metres per day, the compliance limit for the concentration of Total Phosphorus will need to be reduced accordingly to maintain the Monthly Average Loading limit of 1.3 kilograms per day. This condition was not included in ECA #3028-AEUKDQ issued April 10, 2017. The following table provides the adjusted Total Phosphorus Monthly Average Loading Limit for average daily flows in excess of 1,300m3/day. The percent of excess flow was used to calculate the reduction to the loading limit.

Month Average Waste

Loading (kg/day)

Adjusted Loading

Limit (kg/day)

Compliance Limit

Achieved

January 0.23 0.61 Yes

February 0.22 0.61 Yes

March 0.65 0.43 No

The March adjusted Total Phosphorus loading limit exceedance was verbally reported to the Ministry of the Environment and Climate Change – Peterborough District Office on April 4, 2017 and in writing on April 11, 2017. E. Coli ECA #3028-AEUKDQ sets the monthly geometric mean density of E. Coli at 200

cfu/100mL.

E.Coli

Month Geometric Mean

(cfu/100mL)

Concentration Limit

(cfu/100mL)

Compliance Limit Achieved

January 2.00 200 Yes

February 2.38 200 Yes

March 19.86 200 Yes

April 53.69 200 Yes

May 8.41 200 Yes

June 2.86 200 Yes

July 2.00 200 Yes

August 2.49 200 Yes


(cfu/100mL)

Concentration Limit

(cfu/100mL)

Compliance Limit Achieved

September 2.00 200 Yes

October 2.00 200 Yes

November 2.38 200 Yes

December 3.56 200 Yes

pH ECA #3028-AEUKDQ has a pH compliance limit within the range of 6.0 to 9.5, inclusive, at all times. pH

Month Minimum Maximum

January 6.71 6.9

February 7.05 7.23

March 7.18 7.32

April 6.82 7.08

May 6.64 7.11

June 6.94 7.12

July 7.03 7.22

August 7.01 7.12

September 6.45 7.38

October 6.35 6.95

November 6.94 7.08

December 6.73 6.97

The pH of the effluent ranged from 6.35 – 7.38 throughout 2017 which is within the ECA compliance limit at all times.

Acute Lethality to Rainbow Trout and Daphnia Magna

Quarterly effluent samples are collected for analysis for acute lethality to rainbow trout and Daphnia magna and a summary of the results are provided in Appendix II: Acute Lethality Summary. All of the 2017 samples resulted in a 0% mortality rate for both Rainbow Trout and Daphnia magna. Samples were collected on January 11, April 12, August 9 and November 2, 2017. CBOD5, Total Suspended Solids and Total Phosphorus average monthly concentrations and average monthly waste loadings were within the limits set in Condition 7 with the exception of Total Suspended Solids and the adjusted Total Phosphorus loadings in April. High loading results in March caused by high flows. All pH readings and the E.Coli monthly geomean was also within limits.

(b) The 2011 Ministry of the Environment Compliance Inspection Report identified odour issues as a concern with the Bobcaygeon WWTP. A requirement of the Inspection Report was to develop an action plan implementing odour control options as detailed by Cambium Environmental in their report “Mitigation of Odours Bobcaygeon Water Pollution Control Plant” dated October 18, 2010. The action plan included the preferred option and a timeline for installing the odour mitigation equipment. A pilot study using photoionization was implemented at the Bobcaygeon WWTP in 2013 and the results indicated that this method was not able to sufficiently achieve the desired results. Further studies are planned with alternative technologies.

Operational measures currently in place to reduce odour complaints from nearby residents are:

Operational staff continue to monitor wind direction

Potential odour producing maintenance activities continue to be minimized during unfavorable wind direction (if at all possible)

Potential odour causing activities are scheduled to reduce the impact on local residents as much as possible.

(c) OCWA uses a Work Maintenance System (WMS). WMS is a maintenance tracking system that can generate work orders as well as give summaries of completed and scheduled work. During the year, the operating authority at the facility generates scheduled work orders on a weekly, monthly and annual basis. The service work is recorded in the work order history. This ensures routine and preventive maintenance is carried out and assets are maintained to manufacturer’s and/or industry standards. Emergency and capital repair maintenance is completed and added to the system.

Significant upgrades/repairs performed to major equipment in 2017 include:

Replacement exhaust fan damper motor and controller

Replacement Blower #1 VFD

Replacement floats in decant chamber

Replacement pump in SPS #1

Replacement heater in SPS #2

Installation of pipe for bypass pump to hook onto at SPS #3

Installation of air compressor

Installation of flygt flush valves at SPS #8 and SPS #9

Replacement of sludge submersible pump

Repair clarifier gear drive

Rebuild two spare submersible pumps

Repair clarifier 2 sludge collecting flygts

Refer to Appendix II: Maintenance Summary.

(d) Effluent quality assurance is maintained in several ways. Laboratory samples are sent to an accredited laboratory (SGS Lakefield) for analysis of all effluent parameters. Sampling calendars issued to the operator denote frequency of sampling and these calendars are submitted to the Process Compliance Technician at the end of each month. Raw and effluent samples are collected as per the Certificate of Approval and the results are reviewed on a regular basis to ensure compliance with the site’s objectives and limits.

Work orders illustrating all scheduled and preventative maintenance to be completed are issued to the operator and/or mechanic. OCWA conducts internal audits of the facility and develops Action Plans to ensure deficiencies are identified.

Continuous phosphorus removal is achieved with the dosing of aluminum sulfate. A summary of its use and dosage is below:

Month Aluminum

Sulfate (kg)

Aluminum Sulfate Dosage

(mg/L)

January 3287.00 38.13

February 3149.00 40.86

March 4731.00 38.18

April 4611.90 38.05

May 5844.01 40.76

June 4148.90 37.58

July 4422.30 38.96

August 2916.91 36.60

September 2400.90 35.43

October 2692.66 36.67

November 2865.48 34.97

December 2512.40 33.85

(e) Calibration of both Plant 1 and Plant 2 flow meters was conducted as part of

the regular scheduled annual calibrations. Please see Appendix III: Calibration Report.

(f) OCWA uses a number of best efforts to achieve the Effluent Objectives.

Effluent quality assurance and control measures include in-house sampling and testing for operational parameters such as suspended solids, pH, phosphorus, dissolved oxygen, etc. In-house testing provides real time results which are then used to enhance process and operational performance. OCWA also collects raw sewage and effluent samples as per the ECA and reviews these results on a regular basis to ensure compliance with the ECA objectives and limits.

OCWA uses a computerized maintenance management system which generates work orders to ensure maintenance of equipment is proactively performed. In addition, OCWA provides regular status reports to the Owner which includes operational data,

equipment inventory, financial statements, maintenance activities and capital improvement recommendations. OCWA has developed comprehensive manuals detailing operations, maintenance, instrumentation and emergency procedures. To ensure facilities are operated in compliance with applicable legal requirements, facility staff have access to a network of operational compliance and support experts at the hub, region and corporate level. The Bobcaygeon WWTP was able to consistently meet the Effluent Objectives throughout 2017 with the exception of:

Total Suspended Solids – March and April

pH – One reading in September and two readings in October Carbonaceous Biochemical Oxygen Demand (CBOD5)

ECA #3028-AEUKDQ sets the CBOD5 monthly average concentration objective at 15.0 mg/L. Carbonaceous Biochemical Oxygen Demand (CBOD5)

Monthly Average

Average Concentration

(mg/L)

Concentration Objective

Target (mg/L)

Objective Achieved



March 7.00 15.0 Yes

April 5.75 15.0 Yes

May 4.25 15.0 Yes

June 3.20 15.0 Yes

July 2.50 15.0 Yes

August 3.20 15.0 Yes

September 3.25 15.0 Yes

October 2.20 15.0 Yes

November 3.50 15.0 Yes

December 4.50 15.0 Yes

Total Suspended Solids (TSS)

ECA #3028-AEUKDQ sets the TSS monthly average concentration objective at 15.0 mg/L. Total Suspended Solids (TSS)


(mg/L)


Target (mg/L)

Objective Achieved



March 28.00 15.0 No

April 15.75 15.0 No

May 13.75 15.0 Yes

June 10.60 15.0 Yes

July 9.00 15.0 Yes

August 9.40 15.0 Yes






ECA #3028-AEUKDQ sets the TP monthly average concentration objective at 0.5 mg/L.



(mg/L)


Target (mg/L)

Objective Achieved



March 0.16 0.5 Yes

April 0.10 0.5 Yes

May 0.10 0.5 Yes

June 0.09 0.5 Yes

July 0.10 0.5 Yes

August 0.10 0.5 Yes





E.Coli ECA #3028-AEUKDQ sets the monthly E.Coli geometric mean objective at 100 cfu/100mL.

E.Coli


(cfu/100mL)


Target (cfu/100mL)

Objective Achieved



March 19.86 100 Yes

April 53.69 100 Yes

May 8.41 100 Yes

June 2.86 100 Yes

July 2.00 100 Yes

August 2.49 100 Yes





pH With the exception of three readings, the pH of the effluent ranged from 6.35 – 7.38 throughout 2017 which is within the ECA design objectives of 6.5 to 8.5, inclusive, at all times. The three readings which are outside the design objectives are:

6.45 on September 29, 2017

6.46 on October 5, 2017

6.35 on October 26, 2017 pH


January 6.71 6.9

February 7.05 7.23

March 7.18 7.32

April 6.82 7.08

May 6.64 7.11

June 6.94 7.12

July 7.03 7.22


August 7.01 7.12

September 6.45 7.38

October 6.35 6.95

November 6.94 7.08

December 6.73 6.97

Unionized Ammonia

Unionized ammonia has an objective of 0.1mg/L (100 ug/L). Using total ammonia nitrogen, along with field pH and temperature, the following are the results for the monthly calculated unionized ammonia averages. The final unionized ammonia average was less than the objective each month.

Unionized Ammonia (Calculated)


(ug/L)


Target (ug/L)

Objective Achieved



March 0.62 100 Yes

April 0.25 100 Yes

May 2.88 100 Yes

June 0.46 100 Yes

July 0.38 100 Yes

August 0.70 100 Yes





pH The pH and temperatures for the calculations were obtained from field records. The pH and temperature used were those closest to the date and time of sample collection. Temperature The final effluent temperature ranged from 4.95oC to 20.0oC. The parameters listed below are collected as per ECA or regulatory requirements or for process optimization.

Influent

Month Carbonaceous Biochemical Oxygen Demand - CBOD5 (mg/L)

Biochemical Oxygen

Demand - BOD5 (mg/L)

Total Suspended

Solids – TSS (mg/L)

Total Kjeldahl Nitrogen – TKN (mg/L)

Total Phosphorus

– TP (mg/L)

January 222.00 --- 128.00 12.10 1.24

February 202.00 --- 142.00 14.80 2.22

March 75.00 --- 64.00 5.80 0.73

April 115.00 86.00 52.00 10.50 1.05

May 43.00 85.50 66.00 11.90 1.36

June 115.00 151.00 133.00 12.60 1.82

July 103.00 --- 195.00 12.20 1.55

August 234.00 --- 151.00 21.50 2.72

September 150.00 --- 187.00 27.20 2.93

October 155.00 152.00 225.00 25.00 2.96

November 278.00 296.00 178.00 10.60 2.11

December 53.00 64.00 35.00 10.00 1.20

Influent Biochemical Oxygen Demand (BOD5) samples were not collected in July, August or September, 2017 as per ECA 3028-AEUKDQ. The Ministry of the Environment and Climate Change – Peterborough District Office was notified. The requirement to sample BOD came into effect in April, 2017 with the issuance of ECA 3028-AEUKDQ.

(g). The total volume of sludge generated in 2017 was 6587.90 m3. Shepherd Septic Services has been contracted to haul, land apply and store the Biosolids on their approved sites and certified holding lagoon during the winter.

Month Volume (m3)

January 490.97

February 668.19

March 265.50

April 309.15

May 472.80

June 1026.48

July 528.82

August 790.40

September 811.82

October 290.90

November 471.90

December 460.97

Total 6587.90

The anticipated volume of biosolids for the next reporting period is not expected to be appreciably different from this reporting period and no change is expected from the current sludge handling methods and disposal areas currently utilized. Appendix IV: Biosolids Summary has biosolids sampling results. (h) The following complaint concerning the Bobcaygeon WWTP was received during 2017:

A resident was concerned with the amount of traffic to and from the Bobcaygeon WWTP by haul trucks. Operator spoke with the resident and explained the necessity of the trucks and hauling biosolids from the plant.

(i) There were not any spills, by-passes or abnormal discharge events during 2017.

(j) Nothing additional to report at this time.

(k) A summary of all modifications completed as a result of Schedule B, Section 3 are included in Appendix II: Maintenance Summary ; and

(l) The Water Supervisor has not requested any additional information be included in this report.

End.

2017 performance report for bobcaygeon waste water ... · 2017 performance report for bobcaygeon...

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