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1Clean Environment Commission - January 2003
Overview PresentationWinnipeg’s Wastewater Pollution
Prevention Plan
Overview PresentationWinnipeg’s Wastewater Pollution
Prevention Plan
Presented to the Clean Environment Commission
January 27, 2003
City of Winnipeg – Water and Waste Department
2Clean Environment Commission - January 2003
Overview of Plan Overview of Plan
OutlineIntroductionPlan to Improve Wastewater Treatment
DisinfectionAmmonia reductionNutrients CSO control
Financial Impact and Options
3Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
IntroductionMajor considerations
Address the issuesProvide a scientific basis for action.Provide a schedule of implementation.Provide for the operation, maintenance and eventual replacement of assets.Provide the required financial resources to carry out the plan.
4Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
IntroductionExisting Systems
5 Interceptor Sewer systems3 Pollution Control Centres79 CSO locations231 Land drainage outlet
101 to Red and Assiniboine
2 Major Rivers
5Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
IntroductionRoutine River Monitoring done by City of WinnipegYear-round bi-weekly sampling on the Red and Assiniboine Rivers since 1977 at 11locations.
N
Red
Cook's Cr.
Parkdale Cr. Lockport
RiverGrassmere Cr.
RED
RIV
ER
River
FLO
ODW
AY
Assiniboine River
Headingley
WinnipegCity Limits
WEWPCC
SEWPCC
NEWPCC
Sturgeon
Cr.
Omand'sCr.
Bunn's Cr.
Seine
Red
LaSa
lle R
.
SELKIRK
0 10
Approximate Scale
km
RedwoodBridge
NorwoodBridge
Fort GarryBridge
West PerimeterBridge
MainStreetBridge
Floodway ControlStructure
Sampling Location
North PerimeterBridge
St. AndrewsLock & Dam
S. PerimeterBridge
AssiniboinePark Bridge
6Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
IntroductionScientific Basis:
The Red and Assiniboine Rivers Ammonia - Criteria Study, November 2002.The Combined Sewer Overflow Management Study, November 2002.The Nitrification Technical Study, November 2002.Executive Summary: Ammonia Reduction in City of Winnipeg Wastewater Effluent, November 2002.Nutrient Characterization of Discharges from WinnipegEffluent Discharges Limits for Winnipeg’s Water Pollution Control Centres
7Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Plan to ImproveA near- and long-term implementation plan has been developedSupported by Environmental Projects Reserve (EPR) fund.Does not include costs for other system or treatment plant upgrades that might be needed during the same timeframeCosts are in 2002 dollars and no inflation allowance has been included.Approved by City Council December 11, 2002
8Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Approximately $75 Million to be supported by EPR in next 10 years
Plan to ImproveComponent Capital $
(Million)Year Started Year Completed
NEWPCC Disinfection $ 15 2003 2004
Centrate Ammonia Treatment at NEWPCC $ 10 2003 2004
CSO Control Program
(Stage Ia) - SCADA, Demo, Weirs $ 14 2003 2005
(Stage Ib) - Integrate with BFR $ 26 2005 2043
(Stage II) - In line storage $ 50 2028 2033
(Stage III) - Additional storage $ 181 2033 2050
WEWPCC Disinfection $ 3 2050 2051
Effluent Nutrient Control
NEWPCC $ 127 2019 2022SEWPCC $ 47 2022 2025
WEWPCC $ 7 2025 2026
Sub-Total $480 Biosolids Program
(Stage I) - Pelletization and Storage $ 30 2007 2010
(Stage II) - Thermophilic conversion $ 20 2012 2014
TOTAL $530
9Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Plan to Improve.Elements:
Disinfection and ammonia reduction (centrate) are priorities.Disinfection at the WEWPCC can be deferred indefinitely.Allows for long-term nutrient control.Long-term CSO control strategy to achieve a target of 4 overflows.Allows for a new biosolids management system.45 to 50 year program must be flexible to deal with major uncertainties with future program.Additional research, studies, monitoring, dialogue with the Regulator, and public consultation to be conducted in next 10 years to better assess needs, timing, and costs of future actions.
10Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Plan to ImproveFinancial Considerations
Capital funding from EPR, $7 million/year for first 10 yearsPreserves “pay-as-you-go” as much as possible for first 10 yearsWastewater improvements will not delay water treatment plant Increase to the EPR will be necessary after ten yearsNeed to add inflation to meet timeframes
Annual EPR Timeframe(Millions) (Years)
$7.0 2003 to 2012$14.0 2013 to 2022$21.0 2023 to 2032
11Clean Environment Commission - January 2003
Overview of the PlanOverview of the Plan
DisinfectionIn place at the SEWPCCNot required at the WEWPCCRFP out for NEWPCCIn place for May 1, 2005
12Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Ammonia ReductionAmmonia (NH3), a natural by-product of decomposing human and animal waste, is in the treated wastewater (effluent) released to the rivers.Ammonia can be toxic to fish at high concentrationsStudies undertaken to:
Understand rationale of existing and evolving regulationsUnderstand abundance, distribution, behavior and health of aquatic lifeDetermine toxicity of ammonia to local aquatic speciesExplore treatment options and costs
13Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Ammonia ReductionApplication of Ammonia Criteria
Involves several important science-based and site-specific considerations
Allowable ammonia concentration
Exposure
Flow allocation
Period of Record for Design Flow
14Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Ammonia ReductionCity Proposal to Meet Protective Criteria
NEWPCCIn longer term, additional treatment to further reduce ammonia may be required
10-year will meet City’s proposed criteriaImplement Centrate Treatment (2005)
$10 MillionMonitor
Potential additional treatment$0 to 122 Million
WEWPCCContinue use of polishing ponds for ammonia removal
Potential modification$4 Million
SEWPCCContinue secondary treatment process
Monitor: Plant performanceRiver QualityWastewater flows
Potential additional treatment$0 to 33 Million
15Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
NutrientsWinnipeg’s contribution to Lake Winnipeg is:
~ 6.3% of annual phosphorous (P) load**~ 5.2% of annual nitrogen (N) load**
The plan includes $181 million for nutrient control.The City recommends that limits for N and P not be established until:
Province completes basin-wide Nutrient Management Study, andProvince conducts stakeholder and public consultations
Fair and equitable plan involvingMunicipalIndustrialAgricultureCottage OwnersUpstream Neighbours
16Clean Environment Commission - January 2003
Nutrient CharacterizationNutrient Characterization
Nutrient Removal at All Winnipeg WPCCs $181 Million
05,000
10,00015,00020,00025,00030,00035,00040,00045,00050,00055,00060,00065,00070,00075,000
Province's Estimates Province's Estimatesw/BNR at WPCCs
Nitr
ogen
(ton
nes/
year
)
Winnipeg (WPCC,sCSOs, LDS)
Atmospheric Loads
Brokenhead River
Dauphin River
Saskatchewan River
Winnipeg River
Red River w/oWinnipeg
0500
1,0001,5002,0002,5003,0003,5004,0004,5005,0005,5006,0006,5007,000
Province's Estimates Province's Estimatesw/BNR at WPCCs
Phos
horu
s (to
nnes
/yea
r)
3.8 % Reduction260 tonnes/year
3.1 % Reduction2200 tonnes/year
17Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Combined Sewer Overflow (CSO) ControlCombined Sewers Separate Sewers
Older parts of the City (pre 1960)Approximately 30% of City has combined sewersCSO – dilute mixture of sewage and land drainageThe major impact is a temporary increase in fecal coliform levels in the rivers above objectives
18Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
CSO Control: Cost/Benefit Trade-off
19Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
$0 $100 $200 $300 $400 $500 $600 $700 $800 $900 $1,0000%
20%
40%
60%
80%
100%
Estimated Cost (Millions)
Compliance with Fecal Coliforms Objective of 200 organisms/100mL for Different Control Scenarios
Perc
ent C
ompl
ianc
e w
ith O
bjec
tive
for R
ecre
atio
n Se
ason
(May
1 to
Sep
t 30)
$1,100 $1,200 $1,300 $1,400 $1,500
Minimum Compliance - Typical Year at North Perimeter Bridge
CSO Control Options
Dis
infe
ctio
n at
WPC
Cs
Ava
ilabl
e In
-line
Sto
rage
In-li
ne S
tora
ge p
lus
Dis
trib
uted
Stor
age
and
Tran
sfer
s
In-li
ne S
tora
ge p
lus
Dis
trib
uted
Stor
age
and
Tran
sfer
spl
us O
ff-Li
ne S
tora
ge
Tunn
el S
tora
ge (Z
ero
over
flow
s)
Com
plet
e Se
wer
Sep
arat
ion
20Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Combined Sewer Overflow (CSO) Control:Long-term CSO control program be adopted in principle to reduce overflow events
City-wide average of 4 events per summer recreation season (reduced from 18 events)Within a 45 to 50 year timeframeEstimated capital cost: $270 Million
21Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Effluent LimitsBase on the existing secondary treatment performance for:
5-day Carbonaceous Biochemical Oxygen Demand (CBOD5), Total suspended solids (TSS)
Ammonia limit based on science and site specific flow allocations to allow for future developmentLimits for fecal coliform be established to protect summer recreational use of Rivers.
22Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Systems ReliabilityRisk/Criticality Assessments
City will respond to recommendations for design and operational changes at the NEWPCCCity will undertake Risk and Criticality Assessments at the three WPCCs
Assess reliability and backup capability of treatment systemsEstimate mitigation costs, and develop risk reduction planImplement mitigation measures to prevent discharge of untreated sewage12-month study, to be complete in 2004
23Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Financial Impact and OptionsPollution prevention plan to be supported by the current annual EPR funding at $7 M for next 10 yearsFinancial uncertainties
Actual costs of projects versus estimatesInflation over extensive time periodsOther infrastructure costs
24Clean Environment Commission - January 2003
Overview of PlanOverview of Plan
Financial Impact and OptionsA commitment to a higher (or lower) degree of control for:
AmmoniaCSOsNutrients
Make improvements at a faster (or slower) rateIncrease EPR sooner to $14 or $21 million per year
The regulator(s) will issue the license(s) that determine the final outcome
Recommended