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dispersion modeling
baseline actual emissions
Public Participation
PSD
Workbook
A Practical Guide to Michigans Prevention of
Significant Deterioration Regulations
Michigan Department of Environmental Quality
www.michigan.gov/deq
Rev. 5/2014
The Michigan Department of Environmental Quality (MDEQ) will not discriminate against any individual or group on the basis of race, sex, religion, age, national origin, color, marital status, disability or political beliefs. Question or concerns should be directed to Quality of Life Human Resources, P.O. Box 30473, Lansing, MI 48909
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Contents DISCLAIMER ............................................................................................................................. 7
INTRODUCTION ........................................................................................................................ 8
CHAPTER 1: AN OVERVIEW OF PSD.................................................................................... 11
Overview.....................................................................................................................................................13
Important Terms ........................................................................................................................................14
CHAPTER 2: PSD APPLICABILITY ........................................................................................ 25
Definition of Source ..................................................................................................................................27
Major and Minor Sources......................................................................................................................... 28
New and Existing Sources....................................................................................................................... 30
Modifications vs. Excluded Changes and Projects ..............................................................................30
Significant Change....................................................................................................................................31
Determining the Net Emissions Change ...............................................................................................33
Changes not Subject to Applicability......................................................................................................33
CHAPTER 3. BASELINE ACTUAL EMISSIONS .................................................................... 35
BAE for New and Existing Emissions Units ..........................................................................................37
BAE for EUSGU ........................................................................................................................................38
BAE for Non-EUSGU................................................................................................................................39
CHAPTER 4: APPLICABILITY TESTS BASED ON EMISSIONS CHANGES ........................ 43
The Actual to Potential Test (A2P) .........................................................................................................45
A2P Example .........................................................................................................................................46
The Actual to Projected Actual Test (A2A) ...........................................................................................46
Example A2A .............................................................................................................................................54
CHAPTER 5: NETTING .......................................................................................................... 65
Netting, Step by Step............................................................................................................................... .67
Step 1: Identify the Contemporaneous Period .....................................................................................68
Step 2: Determine the Creditable Changes ..........................................................................................69
Step 3: Evaluate the Creditable Changes .............................................................................................69
Step 4: List the Creditable Changes ......................................................................................................69
Step 5: Determine BAE for Creditable Changes ..................................................................................69
Step 6: Determine the Post-Change Potential Emissions for Creditable Changes ........................70
Step 7: Determining the Magnitude of Each Creditable Change.......................................................70
Step 8: Determining the Net Emissions Change..................................................................................70
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CHAPTER 6: PLANTWIDE APPLICABILITY LIMITS............................................................. 75
Definition of a Plant Wide Applicability Limit (PAL) .............................................................................77
Purpose of the PAL...................................................................................................................................77
Obtaining a PAL ........................................................................................................................................77
Setting the PAL .........................................................................................................................................78
PAL Permit Application ............................................................................................................................ 78
Increasing the Level of the PAL .............................................................................................................. 79
How to Develop the PAL Monitoring, Recordkeeping, and Reporting (MRR) Plan........................80
PAL Effective Period and Renewal ........................................................................................................80
CHAPTER 7: BEST AVAILABLE CONTROL TECHNOLOGY ................................................ 83
Introduction ................................................................................................................................................85
Top-Down BACT .......................................................................................................................................85
CHAPTER 8: AIR QUALITY DISPERSION MODELING ......................................................... 95
Introduction ................................................................................................................................................97
Air Quality Models .....................................................................................................................................97
Model Suitability ........................................................................................................................................97
Levels of Model Sophistication .............................................................................................................98
MDEQ Preferred Screening Model: AERSCREEN .......................................................................... 99
MDEQ Preferred Refined Models ......................................................................................................... 99
PSD Modeling for Criteria Pollutants ...................................................................................................101
Significant Impact Level ......................................................................................................................... 101
PSD Increment Analysis ........................................................................................................................ 102
Background Concentration Pre-Construction Monitoring .................................................................104
Secondary Pollutant Impacts ................................................................................................................104
Modeling Protocol Submittal.................................................................................................................. 105
CHAPTER 9: ADDITIONAL IMPACT ANALYSES ................................................................ 107
Introduction ..............................................................................................................................................109
Growth Analysis.......................................................................................................................................109
Soils and Vegetation............................................................................................................................... 109
Visibility.....................................................................................................................................................110
Class I Areas Impact Analysis............................................................................................................... 110
CHAPTER 10: DECISION-MAKING AND PUBLIC PARTICIPATION ................................... 113
Introduction .............................................................
