Bacon Road WTP Backup Generators...• Portable Roll-up Generators • Permanent Stand-by Generators...

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

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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:

timothy.mccann@aecom.com

Joe Borzyn:joe.borzyn@aecom.com

Tim and Joe will also be available for questions after the end of today’s meeting.