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
