Fairfax County, Noman M. Cole, Jr., Pollution Control Plant Water Reuse Project

County of Fairfax, Virginia Department of Public Works and Environmental Services

DESIGN BUILD CONSTRUCTION OF $15.2M

WATER REUSE PROJECT Presented by: Jeff Chapin PE

May 9, 2013 Mid Atlantic Chapter APWA

Annual Conference, Virginia Beach, VA

LOCATION NCPCP

NCPCP

NCPCP 67 MGD FACILITY

DESIGN BUILD TEAM

OWNER: FAIRFAX COUNTY DEPT. OF PUBLIC WORKS AND ENVIRONMENTAL SERVICES

BRIDGING ENGINEER: AECOM/GREELEY & HANSEN

DESIGN BUILDER: M.A. BONGIOVANNI, INC.

DESIGN ENGINEER: DEWBERRY

I&C, SCADA, PROGRAMMING: CH2M HILL

DESIGN BUILD TEAM

OWNER: FAIRFAX COUNTY DEPT. OF PUBLIC WORKS AND ENVIRONMENTAL SERVICES

BRIDGING ENGINEER: AECOM/GREELEY & HANSEN

DESIGN BUILDER: M.A. BONGIOVANNI, INC.

DESIGN ENGINEER: DEWBERRY

I&C, SCADA, PROGRAMMING: CH2M HILL

RECLAIMED WATER MANAGEMENT PLAN &

O&M MANUAL: CDM SMITH

WATER REUSE PROJECT

REUSE WATER PROJECT BENEFITS

• Reduce Nutrients Discharged

to the Chesapeake Bay

• Preserve 1.5 MGD Drinking Water

• Improve Drought Resistance

• Offset Treatment Costs

NCPCP Outfall

REUSE PROJECT COMPONENTS

• 16,000-feet of 20” and 36” Pipe from NCPCP to the Covanta Energy Resource Recovery Facility

• 7,000 feet of 12” Pipe to Laurel Hill GC

• Two 450-horsepower Pumps at NCPCP

• A 500,000-gallon Elevated Storage Tank

• Lower Potomac Park Ball Field Irrigation System

• Instrumentation and Controls

REUSE PROJECT COMPONENTS

• 16,000 ft. 20” & 36” Pipe from NCPCP to Covanta Energy Resource Recovery Facility

• 7,000 ft. of 12” Pipe to Laurel Hill GC

• Two 450-horsepower Pumps at NCPCP

• A 500,000-gallon Elevated Storage Tank

• Lower Potomac Park Ball Field Irrigation System

• Instrumentation and Controls

REQUIRED 52 SEPARATE PERMITS

• Virginia Dept. of Environmental Quality • Virginia Dept. of Transportation • Fairfax County 2232 Approval and Site Plan • VMRC/ACOE Joint Permits • FAA Tank Approval • Building Permits • CSX Railroad Permit • Virginia Stormwater Management Plan

10

I-95

STIMULUS FUNDING

• $ 6.5-Million Funding from American Recovery and Reinvestment Act (ARRA)

• Funds Dispersed to County Through VA Dept. of Environmental Quality

• Construction Start 2 Months from NTP

• Design Build Only Way to Meet

Construction Start Date

CONSTRUCTION BEFORE DESIGN DONE

County Provided 30% Design Drawings

1st Submittal was QA/QC Plan

Submit 75% Design Drawings and Specs

Submit 100% Design Drawings and Specs

Shop Drawings Submitted During Design

DESIGN/BUILD APPROACH

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STAKEHOLDERS

Key Stakeholders: • Citizens (Public Meetings)

• County Park Authority

• County Dept. Public Works and Env. Services

• Covanta Energy Resource Recovery Facility

• County Department of Transportation

• County Solid Waste Program

• Virginia Dept. of Transportation and DEQ

1,000 GPM TO COVANTA FACILITY 15

Covanta Cooling Towers

AVERAGE DAILY DESIGN FLOWS

REUSE AVERAGE DAILY DESIGN FLOWS

COVANTA = 1,080 GPM

LAUREL HILL GOLF COURSE = 833 GPM

LOWER POTOMAC BALL FIELDS = 231 GPM

TOTAL = 2144 GPM

MAXIMUM DESIGN FLOW= 3816 GPM

VA DEQ PERMIT MONITORING

NCPCP REUSE PUMP STATION

REUSE PUMPS IN HH1

• PURPOSE: MAINTAIN WATER LEVEL IN COVANTA ELEVATED TANK

• TWO NEW 450 HP VERTICAL TURBINE PUMPS

• EACH PUMP RATED AT 4,600 GPM @ 297 FT

• ONE PUMP IS A STANDBY UNIT

VFDS, FLOW METER, ANALYZERS

REUSE WATER DOUBLE CHLORINATION

Chlorine Tanks Metering Pumps

36 INCH CHLORINE CONTACT PIPE

TOTAL CHLORINE RESIDUAL (TRC)

CONTACT TIME FLOW

20 MINUTES, MIN @ 4,600 GPM MAXIMUM

30 MINUTES, AVG @ 3,000 GPM NORMAL

PERMIT LIMIT ON TRC= 0.5 MG/L

MAX. TRC FOR IRRIGATION = 5 MG/L

SHUT OFF PUMPING IF TRC LESS THAN 1 MG/L

OR MORE THAN 4.2 MG/L

REUSE WATER BULKFILL STATION

POHICK CREEK 20” PIPE CROSSING

• Pohick Creek Crossing

• VMRC/ACOE permitting

25

I-95 CROSSING

LORTON ROAD CSX BRIDGE 27

CSX RAILROAD BRIDGE

GILES RUN 20” PIPE CROSSING 29

COVANTA FACILITY

• Maintain:

– Continuous Water Flow to Cooling Towers

– Wastewater Pumping at All Times

– Truck Access to the Site

– Safe Working Conditions

– Communication with Facility Management

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Wastewater Pump Station Covanta

DISCHARGE TO COOLING TOWER BASIN

COVANTA 0.5 MG ELEVATED WATER TANK

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COVANTA WASTEWATER PUMP STATION

LAUREL HILL GOLF COURSE

LAUREL HILL BOOSTER PUMP STATION

60 HP Booster Pump Existing Pond Irrigation Pump Station

BALL FIELD IRRIGATION SYSTEM

Booster Pump Pump Station

OPERATION AND MAINTENANCE

SYSTEM O&M BY

• NCPCP Operations Staff

• Fairfax County Wastewater Collection Division

• Covanta Energy Resource Recovery Facility

• Fairfax County Park Authority

• Local Little League Lower Potomac Ball fields

WATER REUSE PROJECT COSTS

• Design Build Bid Price $15,200,000

• Change Orders Total $303,853 (2.0%)

• Total Design Build Cost $15,503,853

CHLORINE RESIDUAL STARTUP PROBLEMS

• ANALYZER CALIBRATION

• LOW & HIGH PLANT EFFLUENT RESIDUAL

• CHLORINE SPIKES AND DECAY

• CHLORINE DECAY WHEN PUMP OF

• METERING PUMPS & CHLORINE STRENGTH

CHLORINE RESIDUAL STARTUP PROBLEMS

• ANALYZER CALIBRATION

• LOW & HIGH PLANT EFFLUENT RESIDUAL

• CL SPIKES AND DECAY

• METERING PUMPS & CHLORINE STRENGTH

• CL PIPING LEAKS

INSTRUMENTATION SCREEN

FUTURE POSSIBLE REUSE CUSTOMERS

• FORT BELVOIR

• POHICK BAY GOLF COURSE

• NEWINGTON CONCRETE

• CARDINAL CONCRETE

Fairfax County, Noman M. Cole, Jr., Pollution Control Plant Water Reuse Project

Equalization Facilities Expansion / Water Reuse Project

QUESTIONS

County of Fairfax, Virginia Department of Public Works and Environmental Services

EX. LAUREL HILL IRRIGATION PUMPS

COVANTA BLOWDOWN