north hudson sewerage authority cso long term control …cso long term control plan public meeting...
TRANSCRIPT
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Agenda:
1. Summary Overview/Status of LTCP Program
2. Ongoing LTCP Project Updates
3. LTCP Development
4. NHSA Social Media Update
5. Next Steps
North Hudson Sewerage AuthorityCSO Long Term Control Plan
Public Meeting #3
August 19, 2019
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Greetings and IntroductionsGreetings and IntroductionsGreetings and IntroductionsGreetings and Introductions
(Please do sign in)(Please do sign in)(Please do sign in)(Please do sign in)
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NJDEP Long Term Control Plan Requirements and NJDEP Long Term Control Plan Requirements and NJDEP Long Term Control Plan Requirements and NJDEP Long Term Control Plan Requirements and Ongoing ActivitiesOngoing ActivitiesOngoing ActivitiesOngoing Activities
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NJPDES LTCP Permit Requirements Met via a Series of Activities and Submittals to the NJDEP by June 1, 2020:
• System Characterization (Work Plans and Reports) – July 1, 2018
• Baseline Compliance Monitoring (Work Plans and Reports) – July 1, 2018
• Public Participation Process (Report) – July 1, 2018
• Identification and Consideration of Sensitive Areas (Report) – July 1, 2018
• Develop and Evaluate CSO Control Alternatives (Report) – July 1, 2019
• Select Alternatives and Plan Implementation of the LTCP (Report) – June 1, 2020
Performed as a LTCP Program with a Consultant Program Manager and a series of projects performed by the Authority’s Engineering Consultants
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Development and Evaluation of Alternatives ReportsSubmitted to NJDEP June 26, 2019
Can be downloaded at: https://www.nj.gov/dep/dwq/cso-ltcpsubmittals.htm
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Where Are We on Developing the LTCP?Where Are We on Developing the LTCP?Where Are We on Developing the LTCP?Where Are We on Developing the LTCP?
CharacterizationEngineering
Alternative EvaluationLong Term Control
Planning
Work Plans
Field Work
Condition Assessment
Sewer Flow Monitoring
CSO Water Quality (WQ)
Monitoring
Hudson River WQ
Monitoring
Identify Sensitive Areas
Engineering
Land Use and Drainage
Analyses
Hydraulic Sewer Modeling
Hudson River WQ Modeling
Public Participation
Reports
Establish CSO Reduction Targets
Identify Opportunities with
Communities to Reduce CSOs
Identify and Evaluate CSO
Control Strategies and
Technologies
Estimate Potential Project Costs
Assess Cost/Performance for
Potential Projects
Report
Assess Financial Capability
Select Strategies and Controls
Select Funding Mechanisms
Develop Schedule for
Implementation
Finalize LTCP
Report
Key:Ongoing
Completed
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Ongoing Long Term Control Plan Project UpdatesOngoing Long Term Control Plan Project UpdatesOngoing Long Term Control Plan Project UpdatesOngoing Long Term Control Plan Project Updates
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H6/H7 CSO LTCP Project• Project Need:
– Reduce CSOs at for LTCP
– Improve long-term Resilience
• Project Goals:
– Reduce CSOs at H6/H7 Outfall 008A
– Reduce/eliminate street flooding
– Integrate with Hoboken GI Plan
– Integrate with Rebuild by Design
• Project Approach:
– Work collaboratively with Hoboken on its Northwest Resiliency Park
– New High-level Storm Sewers
– CSO controls
• Status
– Hoboken – Selected a Construction Contractor
– NHSA 90% design, RFP Phase 1 Services During Construction,
submitting permits
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New High Level Storm Sewer System
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Northwest Resiliency Park Green Infrastructure, Storage and Conveyance
Source: Hoboken Northwest Resiliency Park website http://nwpark-cityofhoboken.opendata.arcgis.com/
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Long Term Control Plan Development
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CSO Control Identification, Evaluation and Selection Process Example
Preliminary ScreeningDevelopment and
EvaluationLTCP Development
Green Infrastructure
Collection System Storage
WWTP Expansion and/or Storage
I/I Reduction
Sewer Separation
CSO Discharge Treatment
Blending
Collection System Storage
CSO Discharge TreatmentCollection System Storage
Key:Ongoing
Completed
Opportunities for:
Green Infrastructure
I/I Reduction
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LTCP Development Approach
• Goal: Achieve 85% wet weather volume capture annually
• Planning Process:
1. Build baseline condition with all committed projects (e.g. closing H2, H6/H7 project, GI, I/I)
2. Optimize strategies to achieve maximum flow through the WWTPs
3. Upgrade conveyance capacity to eliminate any bottlenecks for maximizing flow to the WWTPs
4. Plan for storage in drainage areas to achieve capture
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LTCP Development - Adams Street
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NHSA Adams Street Collection System Schematic
Annual Overflow Volume (MG)
55 MG78 MG
24 MG
5 MG 242 MG 6 MG
15 MG
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Adams Street WWTP
Storage Tank at Trickling Filter
Add Ballasted Flocculation to PURAC
Add Storage Structure over Tanks
Blending via Sidestream Treatment
• Split flows
• Bypass secondary
• Add ACTIFLO treatment
• Add BioACTIFLO treatment
New WWTP Outfall
Storage Tank at Trickling Filter
Blending via Sidestream Treatment
• Split flows
• Bypass secondary
• Add ACTIFLO treatment
• Add BioACTIFLO treatment
• Cloth/Compressible Media Filtration
New WWTP Outfall
Replace 1 Trickling Filter with
storage tank
Blending
New WWTP Outfall
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Adams Street WWTP
Install Storage Tank at Trickling Filter
• Structure
– Analyzing 5 MG and 10 MG tanks
Construct New Plant Outfall
Structure
• Total Length: 1183 ft
• Approximate size to meet
proposed capacity of 52 mgd: 60-
in
Proposed Alignment A
Proposed Alignment B
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Adams Street WWTP
Blending Disinfected Primary Effluent with Secondary UV Disinfected Effluent to Allow for
Increased Capacity at the WWTP
Proposed Process Flow Diagram
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Outfall 002A (H1 Drainage Area - South Hoboken)
Green Infrastructure
I/I Reduction
Sewer Separation
Storage under Observer Highway
Storage under parking lot
CSO Discharge Treatment
CSO Storage Structure under Lot at
Observer Highway and Hudson Street
Combine Flows with Jersey City CSO in
Long Slip Canal
Cloth/Compressible Media Filtration
Disinfection
CSO Storage Structure under Lot at
Observer Highway and
Hudson Street
Opportunities for:
Green Infrastructure
I/I Reduction
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Outfall 002ACSO Storage Structure at Lot at Observer
Highway and Hudson Street
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Outfall 005A (H3/H4/HSI Drainage Area - Central Hoboken)
Green Infrastructure
I/I Reduction
Sewer Separation
Increase Flow to WWTP
CSO Storage under Parks/Fields
CSO Storage Structure in River
CSO Discharge Treatment
Pump more through 5th Street Pump Station
CSO Storage Structure in River
– Mirror Pier C Park
CSO Storage under Stevens Park and/or
Baseball field
Cloth/Compressible Media Filtration
Disinfection
Opportunities for:
Green Infrastructure
I/I Reduction
Pump more through 5th Street
Pump Station
CSO Storage under Stevens Park
or Baseball field
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Outfall 005A
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Increase Flows to WWTP through 5th Street Pump Station
• General
– Adjust H3 and H4 regulator weirs
– Increased peak pumping rate from 15.8 MGD to 31
MGD
– Upstream capacity and piing downstream of pump
station will need to be monitored
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Outfall 005A
CSO Storage Structure at Stevens Park
• Storage Volume: 5 MG
– 25-30 foot storage depth
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Outfall 005A
CSO Storage Structure at Baseball Field
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Outfall 006A (H5 Drainage Area - Central Hoboken)
Green Infrastructure
I/I Reduction
Sewer Separation
Increase flow to WWTP
Consolidate with H3/H4/HSI
CSO Storage
CSO Discharge Treatment
Modify H5 regulator to Convey More to
WWTP
CSO Storage in River at Maxwell Place
Convey Flows to H3/H4/HSI via tunnel
Cloth/Compressible Media Filtration
Disinfection
Opportunities for:
Green Infrastructure
I/I Reduction
Modify H5 regulator to Convey More to
WWTP
CSO Storage in or near River at Maxwell
Place
Convey Flows to H3/H4/HIS via Tunnel
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Outfall 006A
Modify the H5 Regulator to Convey More Flow to the 11th Street Pump Station
• General
– Raise H5 Regulator Weir
– Increase pump station capacity from 10 to 31 MGD
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Outfall 006A
• Storage Volume: 2.35 MG
– 20-foot storage depth
CSO Storage Structure At Maxwell Place Convey Flows to H3/H4/HSI Outfall
Launching Shaft
Receiving Shaft
Drop Shaft
Tunnel Volume: 2.35 MG
3730’ in length; 10’ ID
Structure
20 feet of cover
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Outfall 012A (18th Street Pump Station – Weehawken)
Green Infrastructure
I/I Reduction
Sewer Separation
Increase Flow to WWTP
CSO Storage
CSO Discharge Treatment
Increase Flow to WWTP
Cloth/Compressible Media Filtration
Disinfection
Increase Pumping Capacity to
WWTP
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Outfall 012A
Increase Pumping Capacity of 18th Street Pump Station
• General
– Upgrade Capacity from 5 MGD to 18 MGD
– Increase size of force main
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Outfall 013A (W1234 Drainage Area - Weehawken)
Green Infrastructure
I/I Reduction
Sewer Separation
Increase Flow to WWTP
Relocate Regulators W1, W2 & W3
Tunnel to WWTP
CSO Storage
CSO Discharge Treatment
Opportunities for:
Green Infrastructure
I/I Reduction
Increase Siphon Capacity
Relocate Regulators W1, W2 & W3
Tunnel to WWTP
CSO Storage at Regulator W4
Cloth/Compressible Media Filtration
Disinfection at S/F Facility
Relocate Regulators W1,
W2 & W3
Increase Siphon Capacity
CSO Storage at Regulator W4
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Outfall 013A
Relocate Regulators W1, W2, and W3
W1 Regulator
W2 Regulator
W3 Regulator
• Potential Construction
– With potential work on increasing siphon capacity, this
would provide an opportunity to relocate regulators to aid
in decelerating flow to interceptor
– This alternative is not expected to reduce flows significantly
and will be combined with the other proposed alternatives
for W1234 which convey flow to the plant for optimization
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Outfall 013A
Install a 3rd Barrel for the Park Avenue Siphon to Increase Flow to WWTP
• Structure
– Parallel to existing Siphon
• Piping
– Existing siphons are 24” and 12”
– Next increment is 36” pipe
– Analyzing larger pipe sizes or additional barrel to target
more flow
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Outfall 013A
CSO Storage Tank at Regulator W4
• Storage Volume: 2 MG
– 35-foot storage depth; 100’ diameter
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Outfall 015A (W5 Drainage Area – Weehawken)
Green Infrastructure
I/I Reduction
Sewer Separation
CSO Storage
CSO Discharge Treatment
Construct High Level Storm Sewers
Cloth/Compressible Media Filtration
Disinfection
High Level Storm Sewers
Disinfection Pilot Study
Opportunities for:
Green Infrastructure
I/I Reduction
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Outfall 015A
High Level Storm Sewer
• Project Concept
– Construct stormwater system in parallel to existing combined system
along Boulevard East
– Disconnect catch basins from combined sewers and connect to new
high level storm sewers
– Reconfigure regulator to direct sanitary flows to existing 12”
Interceptor
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LTCP Development - River Road
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River Road Combined Sewer System
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River Road WWTP
CSO Storage Adjacent to WWTP
Gravity Storage Tank with Primary-level
BOD and TSS Removal
Change Treatment Process
• Replace microstrainers with
ACTIFLO treatment
• Replace process with
CoMag/BioMag treatment
• Add Cloth/Compressible Media
Filtration for more TSS removal
CSO Storage Adjacent to WWTP
Gravity Storage Tank
Change Treatment Process
CSO Storage Adjacent to WWTP
Gravity Storage Tank
Change Treatment Process
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River Road WWTP – Change Treatment Processes
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ACTIFLO Treatment
River Road WWTP – Change Treatment Processes
CoMag Treatment
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Outfall 003A (JOSO Drainage Area – Union City & West New York)
Green Infrastructure
I/I Reduction
Sewer Separation
Raise Regulator Weirs
Add Bending Weirs to Regulators
CSO Storage Structure in River
CSO Discharge Treatment
Opportunities for:
Green Infrastructure
I/I Reduction
Raise Regulator Weirs
Add Bending Weirs to Regulators
CSO Storage Structure in River
Cloth/Compressible Media Filtration
Disinfection
Raise Regulator Weirs
Add Bending Weirs to Regulators
CSO Storage Structure in River
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Outfall 003A
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Replace Existing JOSO Side-flow weirs with Bending weirs
Number of Overflows Total CSO Volume
(Mgal)
Existing Bending
Weirs
Existing Bending
Weirs
JOSO (003A) 61 24 95 28
River Road
(002A)
60 60 190 254
Raise Regulator Weirs at UC1, UC2 and/or WNY2
• Divert flows to WWTP and minimize amount routed to
JOSO outfall
• Iterate scenarios raising weirs and analyzing overflow
amounts
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Outfall 003A
CSO Storage Structure constructed in River
• Storage Volume: 5 MG
– 10-foot storage depth; 250’L x 250’W
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Outfall 002A (WNY1 –West New York)
Green Infrastructure
I/I Reduction
Sewer Separation
CSO Storage Tunnel/Tank
Linear Storage under Anthony Defino Way
CSO Storage Structure in River
CSO Discharge Treatment
Opportunities for:
Green Infrastructure
I/I Reduction
Linear Storage under Anthony Defino Way
CSO Storage Structure in River
Cloth/Compressible Media Filtration
Disinfection
Linear Storage under Anthony
Defino Way
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Outfall 001A/002A
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Linear Storage along Anthony M. Defino Way
• 2,200 ft long, 26 ft diameter = 8.3 MG storage
• Number of overflow events at River Road
reduced from 60 to zero. No improvement at
JOSO but can combine with weir optimization
• Site considerations: slope, existing
infrastructure
• Vortex drop structure, WWPS, HRT,
disinfection, new parallel outfall, tide gate
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NHSA Social Media Update
Redesigned Website:
http://www.nhudsonsa.com
Dedicated LTCP Section with
Waterbody Advisory System
@NHSALTCP
or https://twitter.com/NHSALTCP
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Next Steps
• Public Input on Remaining CSO Control Options
• Sequencing of CSO Control Construction
• Analysis of the Financial Implications of Implementing CSO Controls
• Develop Long Term Control Plans (LTCPs)
• June 2020: Submit LTCPs for NJDEP Approval
Next Public Meeting Date November 18, 2019
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Thank You