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

Transcription

1 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

2 LOCATION NCPCP NCPCP

3 NCPCP 67 MGD FACILITY

4 DESIGN BUILD TEAM OWNER: FAIRFAX COUNTY DEPT. OF PUBLIC WORKS AND ENVIRONMENTAL SERVICES BRIDGING ENGINEER: AECOM/GREELEY & HANSEN DESIGN BUILDER: DESIGN ENGINEER: DEWBERRY M.A. BONGIOVANNI, INC. I&C, SCADA, PROGRAMMING: CH2M HILL

5 DESIGN BUILD TEAM OWNER: FAIRFAX COUNTY DEPT. OF PUBLIC WORKS AND ENVIRONMENTAL SERVICES BRIDGING ENGINEER: AECOM/GREELEY & HANSEN DESIGN BUILDER: DESIGN ENGINEER: DEWBERRY M.A. BONGIOVANNI, INC. I&C, SCADA, PROGRAMMING: CH2M HILL RECLAIMED WATER MANAGEMENT PLAN & O&M MANUAL: CDM SMITH

6 WATER REUSE PROJECT

7 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

8 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

9 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

10 REQUIRED 52 SEPARATE PERMITS 10 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 I-95

11 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

12 CONSTRUCTION BEFORE DESIGN DONE County Provided 30% Design Drawings 1 st Submittal was QA/QC Plan Submit 75% Design Drawings and Specs Submit 100% Design Drawings and Specs Shop Drawings Submitted During Design

13 13 DESIGN/BUILD APPROACH

14 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

15 1,000 GPM TO COVANTA FACILITY 15 Covanta Cooling Towers

16 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

17 VA DEQ PERMIT MONITORING

18 NCPCP REUSE PUMP STATION

19 REUSE PUMPS IN HH1 PURPOSE: MAINTAIN WATER LEVEL IN COVANTA ELEVATED TANK TWO NEW 450 HP VERTICAL TURBINE PUMPS EACH PUMP RATED AT 4, FT ONE PUMP IS A STANDBY UNIT

20 VFDS, FLOW METER, ANALYZERS

21 REUSE WATER DOUBLE CHLORINATION Chlorine Tanks Metering Pumps

22 36 INCH CHLORINE CONTACT PIPE

23 TOTAL CHLORINE RESIDUAL (TRC) CONTACT TIME FLOW 20 MINUTES, 4,600 GPM MAXIMUM 30 MINUTES, 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

24 REUSE WATER BULKFILL STATION

25 25 POHICK CREEK 20 PIPE CROSSING Pohick Creek Crossing VMRC/ACOE permitting

26 I-95 CROSSING

27 LORTON ROAD CSX BRIDGE 27

28 CSX RAILROAD BRIDGE

29 GILES RUN 20 PIPE CROSSING 29

30 30 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 Covanta Wastewater Pump Station

31 DISCHARGE TO COOLING TOWER BASIN

32 COVANTA 0.5 MG ELEVATED WATER TANK 32

33 COVANTA WASTEWATER PUMP STATION

34 LAUREL HILL GOLF COURSE

35 LAUREL HILL BOOSTER PUMP STATION 60 HP Booster Pump Existing Pond Irrigation Pump Station

36 BALL FIELD IRRIGATION SYSTEM Booster Pump Pump Station

37 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

38 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

39 CHLORINE RESIDUAL STARTUP PROBLEMS ANALYZER CALIBRATION LOW & HIGH PLANT EFFLUENT RESIDUAL CHLORINE SPIKES AND DECAY CHLORINE DECAY WHEN PUMP OF METERING PUMPS & CHLORINE STRENGTH

40 CHLORINE RESIDUAL STARTUP PROBLEMS ANALYZER CALIBRATION LOW & HIGH PLANT EFFLUENT RESIDUAL CL SPIKES AND DECAY METERING PUMPS & CHLORINE STRENGTH CL PIPING LEAKS

41 INSTRUMENTATION SCREEN

42 FUTURE POSSIBLE REUSE CUSTOMERS FORT BELVOIR POHICK BAY GOLF COURSE NEWINGTON CONCRETE CARDINAL CONCRETE

43 Fairfax County, Noman M. Cole, Jr., Pollution Control Plant Water Reuse Project Equalization Facilities Expansion / Water Reuse Project County of Fairfax, Virginia Department of Public Works and Environmental Services QUESTIONS

44 EX. LAUREL HILL IRRIGATION PUMPS

45 COVANTA BLOWDOWN