This project rehabilitated tertiary filtration facilities at the Noman M. Cole Jr. Pollution Control Plant. Work included replacing valves, gates, and equipment at the DD facility; replacing the HVAC and stairs; replacing the EE building, pumps, and tanks; installing a waste backwash force main; and adding a sodium hypochlorite pump. The goal was to improve filtration and wastewater treatment. Construction was substantially completed in June 2020 by Ulliman Schutte Construction under the management of Fairfax County and design consultants.

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Project No. WW-000016-007
Mount Vernon District
July 31, 2020
Tertiary Filtration System Rehabilitation

2. Project Details
Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
Description:
This project included construction and rehabilitation of tertiary process facilities located at the Noman M. Cole Jr., Pollution
Control Plant. The monomedia filters at the DD facility provide tertiary clarification after the secondary processes. The waste
backwash water pump station at EE facility conveys waste backwash water from the DD and FF filters back to the start of the
process at the flash mix building. This project was substantially complete on June 24, 2020.
Project Overview:
- Rehabilitation of DD valves, actuator, gates, and communications hardware
- Replacement of HVAC inside the DD facility
- Replacement of 5 stairs at the DD facility and GFE Pump Station
- Replacement of EE building and pump station including stairs, HVAC, sump pumping
- Rehabilitation of three EE tanks
- Monorail hoist structure at EE for pump removal
- New waste backwash 24-inch force main from the EE facility to the flash mix facility
- New sodium hypochlorite (SHS) pump and piping at the G and GFE Pump Stations
- New APW pipeline and hydrants
Project Team:
• May Huang, Project Manager, Wastewater Design and Construction Division
• Sajana Chitrakar, Plant Point of Contact, Wastewater Treatment Division
• Jonathan McGrew and Dennis Quick, Resident Engineer, Jacobs
• Taylor Turner, Design Engineer, Arcadis
• Eric Harper, Contractor Project Manager, Ulliman Schutte Construction, Inc.

3. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
Mount Vernon District, Tax Map No. 108-3

4. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
DD Rehabilitation
New actuators for valves and sluice
gates in the filters
New valves and actuators, relocate
lower level valves and actuators to a
higher elevation

5. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
Replacement of DD Stairs

6. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
New EE Pump Station and Monorail Hoist Structure

7. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
EE Pump Station and Tanks
Before: EE Facility, handrails at the EE
Tanks, actuators replaced
After

8. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
EE Pump Station
After
Before
During

9. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
EE Electrical Room
After
Before

10. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
EE Tank Rehabilitation during Construction

11. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
Waste Backwash Force Main
Trench during construction
Valve and tie-in at the Flash Mix
Building

12. Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
SHS Pump 4 and Feed
New SHS Pump 4
New SHS Pipe with insulation and
walkway with handrails

13. Additional Information
For additional Information, please call
www.fairfaxcounty.gov/publicworks
Tertiary Filtration System Rehabilitation
Capital Facilities/Wastewater Design and Construction Division/Treatment Branch
Irene Haske, Communications Specialist
703-324-5821, TTY 711
Irene.Haske@fairfaxcounty.gov