PDX DEICING STORMWATER SYSTEM

1. PDX DEICING STORMWATER SYSTEM Presentation for Pacific Northwest Pretreatment Conference September 15, 2005

2. Presentation prepared by • Richard Vincent Deicing Operations Manager Portland International Airport Port of Portland – (503) 460-4685 richard.vincent@portofportland.com • Eric DeBerry Pretreatment Permit Manager City of Portland Bureau of Environmental Services – (503) 823-5538 ericd@bes.ci.portland.or.us

3. FROST DEICING & ANTI- ICING AIRCRAFT RUNWAYS & TAXIWAYS WINTER STORM EVENTS AIRCRAFT DEICING RUNWAY, TAXIWAY AND RAMP DEICING LANDSIDE ROADS & WALKWAYS DEICING ACTIVITES

4. FROST DEICING

5. WINTER STORM EVENT JANUARY2004

6. AIRCRAFTDEICING& FLIGHT SAFETY • Ice accumulation of 1/64TH of an inch on the leading edge of an aircraft wing decreases lift on takeoff by as much as 25% • FAA requires that aircraft wings, propellers, windshield, engines, flight instrument systems, fuselage and control surfaces must be free of frost, ice and/or snow prior to taking off – Federal Aviation Administration Regulation (FAR) Part 121

7. FAA APPROVED AIRCRAFT DEICERS ETHYLENE GLYCOL PROPYLENE GLYCOL FAA APPROVED PAVEMENT DEICERS POTASSIUM ACETATE SODIUM FORMATE *Values represent pure product. The glycols are diluted at least 50% prior to application BOD CONCENTRATIONS OF APPROVED CHEMICALS 5.6 lbs/gal 9.0 lbs/gal 1.2 lbs/gal 0.6 lbs/gal

8. BOD – Biochemical Oxygen Demand • Measure of how much dissolved oxygen is being consumed as microbes break down organic matter.

9. BODTestConsiderations • Results are not absolute values, they are subject to variability (seed quality, dilution, pH) • Difficult to compare results between Labs • BOD5 test takes five days to complete

10. BOD vs. COD • COD results within hours vs. days • Statistical correlation can be made between BOD and COD • For deicing glycols: BOD mg/L = 0.62(COD) + 142 mg/L

11. PDX WATER QUALITY RELATED PERMITS • OREGON DEQ ISSUED PERMITS • INDIVIDUAL NPDES DEICING PERMIT • 1200-COLS GENERAL STORMWATER PERMIT • 1700-B WPCF • INDIVIDUAL NPDES DEWATERING PERMIT • 1200-CA EROSION CONTROL PERMIT • MS-4 COPERMITEE • CITY OF PORTLAND – BUREAU OF ENVIRONMENTAL SERVICES (BES) • PRETREATMENT PERMIT

12. City of Portland Pretreatment Permit Requirements • Daily maximum at will mass discharge limit of 1,200 lbs BOD. • Controlled dry weather BOD limit of 5,000 lbs per day weekdays, 10,000 lbs per day weekends. Requires BES approval and secondary treatment. • Discharge shall not exceed 300 gpm.

14. TWO COLLECTION SYSTEMS • CONCENTRATED COLLECTION SYSTEM • Collects high strength material from aircraft deicing activities near the terminal • DILUTE COLLECTION SYSTEM • Collects runway & taxiway deicing materials as well as drip and shear from aircraft maneuvering for take-off • Provides a back-up to the concentrated system

15. NORMAL RUNOFF BASINS

16. DEICING SYSTEM ON – DRAINAGE BASINS

17. BASIC DEICING SYSTEM LAYOUT

18. CONCENTRATED SYSTEM • SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM (SCADA) • FOUR PUMP STATIONS • 2 + MILES OF PRESSURE LINES • REMOTE VALVES • FIVE BOD METERS • FLOW METERS • 2 MILLION GALLON STORAGE TANK • SNOW CONTAINMENT PAD • TRUCK LOAD-OUT FACILITY

19. CONCENTRATED COLLECTION SYSTEM LAYOUT

20. Glycol Recovery Vehicles On standby whenever the temperature is below 40° FMost efficient for frost deicing operationsLimited performance during freezing precipitation events

21. FOUR PUMP STATION CONTROL BUILDINGS

22. PUMP STATION A LOCATION

23. TWO – MILLION GALLON STORAGE TANK & TRUCK LOAD-OUT FACILITY

24. SNOW CONTAINMENT PAD

25. SNOW CONTAINMENT PAD

26. pH METER INSTALLATION

27. BOD METERS

28. BOD METER – ISCO AIRPORT BIOX 1015 • Measures level of BOD in real time • Allows the diversion of flow based on BOD concentration • Key component in loading calculations • PDX operates twelve (12) BIOX instruments • $60,000 per instrument • $250,000 per year in operations/maintenance costs

29. BOD METER – ISCO AIRPORT BIOX 1015

30. Bio-Media Matrix Bio-Reactor

31. BIOX Limitations • Adaptation period for BOD sources other than glycols • Limited ability to detect or measure insoluble BOD sources due to short residence time in the medium.

32. Comparison of BOD Test Results

33. BIOX Field Modifications • Replaced existing fittings with more bio-compatible materials • Adjusted pH of nutrient feed • Eliminated residual chlorine in City feed water • Feed biomass propylene glycol, potassium acetate & sodium formate

34. BIOX Maintenance Requirements • Two to three weeks to start-up all twelve meters at the beginning of the season • Approximately 7 hours per week per instrument for regular maintenance and calibration • Staff must be available 24/7 to respond to BIOX alarms • Two to three weeks to mothball all twelve meters at the end of the season

35. SCADA SYSTEM MAIN DISPLAY

36. SCADA SYSTEM DISPLAY – PUMP STATION J (CONCENTRATE STORAGE TANK)

37. BIOX Meter Readings

38. SCADA ReportsSupervisory Control and Data Acquisition

39. Compliance Monitoring • Airport - BIOX accepted for BOD control • Airport - Continuous pH monitoring • Portland - A grab sample is taken, and the BIOX reading is recorded. If the sample result is within + or – 15% of the BIOX reading, the sample is in compliance.

40. DILUTE SYSTEM • SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM (SCADA) • FIVE PUMP STATIONS • 2 + MILES OF PRESSURE LINES • REMOTE VALVES • SEVEN BOD METERS • FLOW METERS • 13 MILLION GALLON DETENTION BASIN

41. DILUTE COLLECTION SYSTEM LAYOUT

42. PUMP STATIONS I & 6

43. PUMP STATION E – VERTICAL TURBINE PUMPS

44. PUMP STATION F

45. DILUTE DETENTION BASIN

46. DILUTE DETENTION BASIN

47. DILUTE DETENTION BASIN

48. SCADA SYSTEM DISPLAY – PUMP STATION I (DILUTE DETENTION BASIN)