Embed Size (px)
Citation preview
1October 26, 2017
Backup Generators –Bacon Road Water Treatment Plant
Case Study
Joe Borzyn, PE, LC - AECOM
Timothy McCann, PE - AECOM
October 26, 2017
2October 26, 2017
Agenda
• Bacon Road WTP Background• Project Background• Generator Alternatives• Final Selection & Construction
3October 26, 2017
Bacon Road Water Treatment Plant – History
• Plant Operational in 1982 • Located in Painesville Township• Provides Water to:
- Perry Village- North Perry Village- Perry Township- Madison Township- Madison Village- Sections of Painesville Township
• Average 3 MGD • Original Capacity 6 MGD• High Rate Upgrade in Capacity 9
MGD
4October 26, 2017
Bacon Road WTP – General Location
Raw Water Pump Sta.
Main Plant
Lake Road Bacon Road
Lake County
Geauga County
Asht
abul
a C
ount
y
Bacon Road WTP
5October 26, 2017
Bacon Road WTP – Background
• Raw Pumping• Chemical Addition
- Activated Carbon- Alum/Polymer- Chlorine- Fluoride- Phosphate- Polymer- Potassium Permanganate
• Rapid Mix• Flocculation• Sedimentation• Filters• Chlorination• Clear Wells• High Service Pumping
6October 26, 2017
Bacon Road WTP – Raw Water Pump Station
• On Lake Erie Shore• Approximately 1/2 Mile from Plant• Serves WTP and Industrial Facility• Capacity 9-10 MGD• 48-inch Intake Pipe
- 4,000 Feet into Lake Erie• Two Envirex Traveling Screens• Potassium Permanganate Feed
System• Vertical Turbine Pumps• Army Corps of Engineers Designing
a Shoreline Protection System Project
7October 26, 2017
Flocculation Basins
(2)
Sludge
Raw Water Pump
Station
Sludge Holding
Filters (4)
RapidMix(2)
Bacon Road WTP – Process Diagram
Sedimentation Basins
(2)
Settled Effluent Channel
ClearwellFinished
WaterWell
Lake Erie
Sludge Lagoons (2)
Sludge Thickeners
(2)
8October 26, 2017 8
9October 26, 2017
• Ten States Standards – Section 2.6 - Dedicated standby power shall be required by
the reviewing authority so that water may be treated and/or pumped to the distribution system during power outages to meet the average day demand. Alternatives to dedicated standby power may be considered by the reviewing authority with proper justification.
• Ohio EPA – System Depressurization- Any disruption of a water distribution system
that results in a loss of continuous positive pressure of at least twenty pounds per square inch gauge at ground level at any point in the distribution system may allow contaminants to enter the system.
Backup Power – Ten States Standards and Ohio EPA
10October 26, 2017
• Separate Utility Substations• Engine Driven Pumps• Portable Roll-up Generators• Permanent Stand-by Generators
- Diesel- Natural Gas- Propane
• Exterior vs Interior Generators- Space within Existing Building- Interior Intake and Exhaust- Sound Attenuation Enclosure
• What to Power?- Entire Plant- Certain Equipment, Pumps, etc.
Backup Power Alternatives
11October 26, 2017
Two Services – First Energy & Painesville Municipal Power
Main Plant
Raw Building
12October 26, 2017
Electrical Service Outage at the Plant in 2014
• First Outage- About 10 hours- Utilized a County Generator to
Pump from Clearwell• Second Outage
- One Week Later- Utilize Generator Again
• Maintained System Pressure- During Each Outage- Ran Pump at Slow Speed- No Violations
• Realization that change was needed- Within a month, two generators
were rented
900kW Generator at Main
200kW Generator at Raw
13October 26, 2017
Lake Country decides to create a project, hires AECOMThe Project would include:
• Designing permanent back-up generator(s) for the Main and Raw Buildings• Consultation with plant personnel.• Review of existing drawings.• Survey of existing conditions• Determination of existing Main and Raw Building electrical loads.• A Memo/Report describing the existing conditions, proposed solutions and line
item cost summaries.• Presentation to the County Sanitary Engineer to determine what scope would
be included in the Construction Documents.• Develop Construction Drawings and Specifications.• Review all submitted Bids, offer recommendation.• Submittal review• On site inspection services throughout construction.• Punch lists
14October 26, 2017
The Bacon Road Treatment Plant Emergency Back up Power Project, The Memo/Report
• Description of existing conditions• Assumptions, Clarifications,
Comments• Four Generator Alternatives• Replacement of the 30+ year old
Main Electrical Service Panels at both buildings.
• Other Items included in Memo:- Replacement of direct buried
service cables from Main to Raw building
- Adding a low voltage duct bank from Main To Raw building
• Life Safety System analysis • Cost summary
Main Plant MDP
Raw Building MDP
15October 26, 2017
The Four (4) Generator Alternatives
• Alternative #1: One Generator at the Main Building for both the Main and Raw Buildings
• Alternative #2: One Generator at Main Building, One Generator at Raw Building
• Alternative #3: Multiple Generators at Main Building for both the Main and Raw Buildings
• Alternative #4: Multiple Generators at Both Buildings
16October 26, 2017
Generator Alternative #1
• Alternative #1: One Generator at the Main Building for both the Main and Raw Buildings- Not recommended due to reliance on the direct buried service feeders.- A 750kW generator is almost twice the cost of a 500kW.
Raw Water Pump Station
Main Plant
17October 26, 2017
Generator Alternative #2
• Alternative #2: One Generator at Main Building, One Generator at Raw Building- The recommended alternate, was the least costly- Followed, recommended design practice to have standby generator close to
load
Raw Water Pump Station
Main Plant
18October 26, 2017
Generator Alternative #3
• Alternative #3: Multiple Generators at Main Building for both the Main and Raw Buildings- Not recommended due to reliance on the direct buried service feeders.- Level of redundancy more than required by Lake County
Raw Water Pump Station
Main Plant
19October 26, 2017
Generator Alternative #4
• Alternative #4: Multiple Generators at Both Buildings- Level of redundancy more than required by Lake County
Raw Water Pump Station
Main Plant
20October 26, 2017
Creating Construction Documents of Alternate #2
• Lake County determined that one generator sized to provide all loads in each of the buildings was sufficient.
• Updated order of magnitude cost estimate.• Phasing of Construction (need for Temporary Switchboards)• Replacement Main Service Panels located in same location as existing.• New outbuilding needed to house:
- Automatic Transfer Switch - Main Service Entrance Switch
• The project is currently under construction.
• Lake County has hired AECOM to perform the same work at their Aquarius WTP.
21October 26, 2017
Construction Photographs
22October 26, 2017
Construction Photographs
23October 26, 2017
Construction Photographs
24October 26, 2017
Construction Photographs
25October 26, 2017
Questions?
Thank You!Tim McCann:
Joe Borzyn:[email protected]
Tim and Joe will also be available for questions after the end of today’s meeting.
