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

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Presentation on theme: "PDX DEICING STORMWATER SYSTEM Presentation for Pacific Northwest Pretreatment Conference September 15, 2005."— Presentation transcript:

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

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

3 DEICING ACTIVITES FROST DEICING & ANTI- ICING FROST DEICING & ANTI- ICING AIRCRAFTAIRCRAFT RUNWAYS & TAXIWAYSRUNWAYS & TAXIWAYS WINTER STORM EVENTS WINTER STORM EVENTS AIRCRAFT DEICINGAIRCRAFT DEICING RUNWAY, TAXIWAY AND RAMP DEICINGRUNWAY, TAXIWAY AND RAMP DEICING LANDSIDE ROADS & WALKWAYSLANDSIDE ROADS & WALKWAYS

4 FROST DEICING

5 WINTER STORM EVENT JANUARY 2004

6 AIRCRAFT DEICING & FLIGHT SAFETY Ice accumulation of 1/64 TH of an inch on the leading edge of an aircraft wing decreases lift on takeoff by as much as 25% Ice accumulation of 1/64 TH 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 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 BOD CONCENTRATIONS OF APPROVED CHEMICALS 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 5.6 lbs/gal 9.0 lbs/gal 1.2 lbs/gal 0.6 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. Measure of how much dissolved oxygen is being consumed as microbes break down organic matter.

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

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

11 PDX WATER QUALITY RELATED PERMITS OREGON DEQ ISSUED PERMITS OREGON DEQ ISSUED PERMITS INDIVIDUAL NPDES DEICING PERMITINDIVIDUAL NPDES DEICING PERMIT 1200-COLS GENERAL STORMWATER PERMIT1200-COLS GENERAL STORMWATER PERMIT 1700-B WPCF1700-B WPCF INDIVIDUAL NPDES DEWATERING PERMITINDIVIDUAL NPDES DEWATERING PERMIT 1200-CA EROSION CONTROL PERMIT1200-CA EROSION CONTROL PERMIT MS-4 COPERMITEEMS-4 COPERMITEE CITY OF PORTLAND – BUREAU OF ENVIRONMENTAL SERVICES (BES) CITY OF PORTLAND – BUREAU OF ENVIRONMENTAL SERVICES (BES) PRETREATMENT PERMITPRETREATMENT PERMIT

12 City of Portland Pretreatment Permit Requirements Daily maximum at will mass discharge limit of 1,200 lbs BOD. 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. 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. Discharge shall not exceed 300 gpm.

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

15 NORMAL RUNOFF BASINS NORMAL RUNOFF BASINS

16 DEICING SYSTEM ON – DRAINAGE BASINS

17 BASIC DEICING SYSTEM LAYOUT

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

19 CONCENTRATED COLLECTION SYSTEM LAYOUT CONCENTRATED COLLECTION SYSTEM LAYOUT

20 Glycol Recovery Vehicles On standby whenever the temperature is below 40° F Most efficient for frost deicing operations Limited 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

26 pH METER INSTALLATION

27 BOD METERS

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

29 BOD METER – ISCO AIRPORT BIOX 1015

30 Bio-Reactor Matrix Bio-Media

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

32 Comparison of BOD Test Results Prepared Concentration BIOX Reading WPCLCAS 50400 mg/L 50272 mg/L 45300 mg/L 47800 mg/L 46800 mg/L 47300 mg/L 46800 mg/L average 48100 mg/L 47900 mg/L 48700 mg/L 45700 mg/L 47233 mg/L average 1:20 dilution of Aircraft Deicing Fluid (Propylene Glycol) Averaged over 10 hour period analyzing the sample

33 BIOX Field Modifications Replaced existing fittings with more bio-compatible materials Replaced existing fittings with more bio-compatible materials Adjusted pH of nutrient feed Adjusted pH of nutrient feed Eliminated residual chlorine in City feed water Eliminated residual chlorine in City feed water Feed biomass propylene glycol, potassium acetate & sodium formate 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 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 Approximately 7 hours per week per instrument for regular maintenance and calibration Staff must be available 24/7 to respond to BIOX alarms 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 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 Pump Station DateTimeValue PSJ4/23/200410:04 6162.5 mg/L PSJ4/23/200410:09 6106.5 mg/L PSJ4/23/200410:14 6121.1 mg/L PSJ4/23/200410:19 6167.3 mg/L

38 SCADA Reports Supervisory Control and Data Acquisition Date LBS BOD Allowable BOD Total Flow Gallons 02/15/20044,9235,000108,800 02/16/20043,0155,00075,800 02/17/20041,1621,20024,710

39 Compliance Monitoring Airport - BIOX accepted for BOD control Airport - BIOX accepted for BOD control Airport - Continuous pH monitoring 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. 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) SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM (SCADA) FIVE PUMP STATIONS FIVE PUMP STATIONS 2 + MILES OF PRESSURE LINES 2 + MILES OF PRESSURE LINES REMOTE VALVES REMOTE VALVES SEVEN BOD METERS SEVEN BOD METERS FLOW METERS FLOW METERS 13 MILLION GALLON DETENTION BASIN 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

47

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

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