Permit Writer's Manual Appendices

135 Pages·2015·3.64 MB·English

by  Water Quality Program

Appendices

Water Quality Program
Permit Writer’s Manual

Revised January 2015/
Updated September 2018
Publication no. 92-109 Part 1
Publication and Contact Information
This appendices file is available on the Department of Ecology website at
https://fortress.wa.gov/ecy/publications/SummaryPages/92109part1.html

The Permit Writer’s Manual is available at
https://fortress.wa.gov/ecy/publications/SummaryPages/92109.html

For more information contact:

Water Quality Program
P.O. Box 47696
Program Development Services Section
Olympia, WA 98504-7696

Phone: [phone]

Washington State Department of Ecology - www.ecology.wa.gov
Headquarters, Olympia 360-407-6000
o
Northwest Regional Office, Bellevue 425-649-7000
o
Southwest Regional Office, Olympia 360-407-6300
o
Central Regional Office, Yakima 509-575-2490
o
Eastern Regional Office, Spokane 509-329-3400
o

Accommodation Requests:
To request ADA accommodation including materials in a format for the visually impaired, call
Ecology at 360-407-6600 or visit https://ecology.wa.gov/accessibility. People with impaired
hearing may call Washington Relay Service at 711. People with speech disability may call TTY
at 877-833-6341.
Appendices

Water Quality Program
Permit Writer’s Manual

Prepared by:
M. Eleanor Key, P.E.

Water Quality Program
Washington State Department of Ecology
Olympia, Washington
This page is purposely left blank
Table of Contents
Appendix A
1. Index to NPDES Regulations 1
Appendix B 8
1. Autocorrelation 8
1.1 Adjustment of Monthly Average Effluent Limitations for Autocorrelation 8
2. An Alternative Method for Estimating Upper Quantiles 17
2.1 Ratio of Upper Percentiles to Geometric Mean 18
3. Deriving the 7Q10 High Flow (HF) and the Design Spill 18
3.1 Guidelines for Deriving the 7QHF 18
3.2 Determining Design Spill for Gas Abatement 19
Appendix C 20
1. Introduction 20
2. Mixing Zone General Restrictions 21
3. What is a Dilution Factor 22
4. Prorating Dilution Factors 23
5. Centerline and Flux-Average Dilution Factor 24
6. Selecting a Reasonable Worst-Case Scenario 26
6.1 Critical Effluent Flow 27
6.2 Critical Ambient Conditions 32
7. Minimize Mixing Zones 34
7.1 Maximum Downstream Distance Allowed 34
7.2 Maximum Waterbody Width Restrictions 35
7.3 Maximum Ambient Flow Restrictions 35
7.4 Applying Distance, Width, and Flow Restrictions to Model-Predicted Dilution Factor 35
8. Choosing an Initial Dilution Model 37
8.1 Understanding Initial Dilution Theory 38
8.2 Choosing a Nearfield Model 39
9. Dynamic Models 45
10. Boundary Condition(s) 46
11. Understanding Farfield Theory 46
11.1 Choosing a Farfield Model 47
12. Conducting a Tracer Study 49
12.1 Confirm the Presence of an Eddy 49
12.2 Quantify Dilution 50
12.3 Quantify Farfield Accumulation (Reflux) 50
12.4 Develop a Farfield Diffusion Coefficient 56
13. What to look for in a Mixing Zone Study 56
13.1 General Requirements 56
Permit Writer’s Manual Appendices
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13.2 Diffuser Information 57
13.3 Discharge Characteristics 58
13.4 Ambient Water Characteristics 58
13.5 Model 59
14. References 59
Attachment C.1 Estimating critical stormwater flow for Western Washington 63
Attachment C.2 - Estimating steady-state 10th, 50th, and 90th percentile
current velocities for estuaries and tidally-influenced river systems 68
Attachment C.3 Delineation of Estuaries 70
Attachment C.4 Using Continuous Simulation Dynamic Modeling to
Establish Dilution Factors 71
Appendix D 73
1. Supporting Statistical Study for Performance-Based Reduction of Monitoring 73
1.1 Effect of Sample Size on Probability of Violation 73
1.2 Detailed Protocol for Calculating Probability of Reporting Permit Violations 76
2. Determining the Number of Samples Required for Compliance Monitoring 79
Appendix E 85
1. What is a Total Maximum Daily Load? 85
2. The TMDL Process 86
2.1 Water Quality Standards Review 86
2.2 Water Quality Assessment 88
2.3 TMDL Selection, Management, and Outreach 89
2.4 The TMDL Study 91
2.5 Establishing Wasteload and Load Allocations 113
2.6 Public Outreach and Publication of the TMDL 122
2.7 Implementation and Monitoring 122
2.8 Implementing TMDLs into NPDES Permits 123
3. References 125

Permit Writer’s Manual Appendices
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Appendix A
1. Index to NPDES Regulations
SUBJECT CFR NUMBER

301(b) - see Fundamentally Different Factors
301(c)................................................................................ ............................... 122.21(1)(2)
301(g)................................................................................ ............................... 122.21(1)(2)
301(h) - Secondary treatment waiver............................................ ................... 122.21(m)(1)
122.56
301(k)................................................................................. .............................. 122.21(m)(2)
122.21(l)(3)
122.90

301(k)................................................................................ ............................... 122.21(l)(4)
125.20
316(a)................................................................................ ............................... 122.21(l)(6)
125.70
124.51(7)(a)
124.66
401(a) State Certification......................................................... ...................... 124.54
124.65
Administrative Procedures Act
Permit Continuation...................................................... ...................... 122.6
Administrative Record............................................................. ........................ 124.9
Alternate Test Procedures ................................................................................ 136.4
Anti-Backsliding (Reissued Permits)............................................ ................... 122.44(l)
Application.......................................................................... ............................. 122.21
Completeness.............................................................. ............................... 122.21(e)
124.3(c)-(g)
Existing Facilities....................................................................................... 122.21(g)
Municipal................................................................... ................................ 122.21(j)
Submittal Deadline (Time to Apply)................................... ...................... 122.21(c)
Aquaculture......................................................................... ............................. 122.25
125.10
Aquatic Animal Production Facilities
Application................................................................. ........................ 122.21(h)(2)
Definition................................................................... ......................... 122.24
Appendix A
Appendix A – Permit Writer’s Manual Appendices
Page 1
SUBJECT CFR NUMBER
Average Monthly Discharge Limitation ........................................................... 122.2

Average Weekly Discharge Limitation (POTW)........................... .................. 122.2
Backsliding.......................................................................... ............................. 122.62(a)(15)
122.62(a)(17)
Best Management Practices
Definition................................................................... ......................... 122.2
122.44(k)
125.100
Best Professional Judgment (Case-by-Case)................................. ................... 125.3
Boilerplate (General) Permit Conditions........................................ .................. 122.41 - 122.44
Bypass............................................................................... ............................... 122.41(m)
Calculating NPDES Permit Conditions........................................ .................... 122.45
Case-by-Case Limitations......................................................... ....................... 122.44(a), 125.3
Case-by-Case Permits............................................................. .......................... 124.52
Coast Guard......................................................................... ............................. 122.44
Coastal Zone Management Act................................................... ..................... 122.49(d)
Combined Sewers (stormwater/wastewater.................................... ................. 133.103(a)
Combined Wastes (municipal/industrial)....................................... .................. 133.103(b)
Comments During Public Notice Period........................................ .................. 124.13
Compliance Schedules............................................................. ........................ 122.41(l)(5)
122.47
122.62(a)(13)
Computation of Time.............................................................. ......................... 124.20
Concentrated Animal Feeding Operations
Application................................................................. ................................ 122.23
Definition................................................................... ................................. 122 Appendix B
Concentrated Aquatic Animal Production........... ............................................ See Aquatic Animal Production
Conditions applicable to all Permits ................................................................. 122.41
Confidentiality of Information................................................... ...................... 122.7
Consolidation of Permit Processing............................................. .................... 124.4
Continuation of Expiring Permits..................................................................... 122.6
Conventional Pollutants........................................................... ........................ 401.16
DMR - See Discharge Monitoring Report
Daily Average - See Average Monthly
Daily Maximum - See Maximum Daily
Definitions.......................................................................... .............................. 122.2
124.2
401.11
Appendix A – Permit Writer’s Manual Appendices
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SUBJECT CFR NUMBER
Denial of Permit.................................................................... ........................... 124.6(b)
Public Notice............................................................... ............................... 124.10(a)(i)

Design Flow (POTW)............................................................. ......................... 122.45(b)
Dilution/Ocean.................................................................. ............................... 125.123(d)(1)(i)
Dilution/Pollution.................................................................. .......................... 122.45(f)(1)(iii)
Discharge Monitoring Report (DMR)........................................... .................. 122.41(l)(4)(i)
Discharge of Pollutants - Definition............................................. ................... 122.2
Disposal into well, POTW, or land application.............................. ................. 122.50
122.45(i)
Draft Permit........................................................................ ............................. 124.6
Duration of Permits................................................................ .......................... 122.46
Duty to Comply................................................................................................ 122.41(a)
Duty to Mitigate.................................................................... ........................... 122.41(d)
Duty to Provide Information..................................................... ....................... 122.41(h)
Duty to Reapply.................................................................... ........................... 122.41(b)
Effective Date...................................................................... ............................ 124.15
Effluent Limits for Continuous Discharges………………………………… 122.45(d)
EIS - Public Notice for New Source............................................ .................... 124.10(b)(1)
EIS - Final.......................................................................... .............................. 124.61
Endangered Species Act........................................................... ....................... 122.49(c)
EPA Review and Objection to State Issued NPDES Permits........................... 123.44
Environmental Impact Statement
New Source................................................................ ................................ 122.29(c)
NEPA....................................................................... .................................. 40 CFR Part 6
Evidentiary Hearing Procedures................................................. ..................... 124.71 - 124.91
Ex Parte Communication......................................................... ........................ 124.78
Exclusions (from NPDES permits).................................................................. 122.3
Existing Source - Definition...................................................... ...................... 122.29(a)(3)
Expiration Dates (Duration of Permits)......................................... .................. 122.46, 124.20
Extension of Public Comment Period........................................... ................... 124.12(c)
Extension of Permits.............................................................. .......................... 122.46(b)
122.6
Fact Sheets.......................................................................... ............................. 124.8
124.56
Feedlots (see concentrated animal feeding operations)
Filter Backwash.................................................................... ........................... 125.3(g)
Fish and Wildlife Coordination Act............................................ ..................... 122.49(e)
Fish Farms (see aquatic animal production facilities)
Appendix A – Permit Writer’s Manual Appendices
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SUBJECT CFR NUMBER
Flow Monitoring Required.................................................................... ........... 122.44(i)(1)(ii)
403.12(b)(4)
Fundamentally Different Factors................................................ ...................... 122.21(l)(1)
125.30
122.44(d)(8)
General Permits.................................................................... ............................ 122.28
Public Notice.............................................................. ................................ 124.10(c)(2)(i)
Special Procedures........................................................ ............................. 124.58
Innovative Technology - see 301(k)
Inspection and Entry............................................................... .......................... 122.41(i)
Intake Credits (technology-based) .................................................................... 122.45(g)
Instream Aeration.................................................................. ........................... 125.3(f)
Internal Waste Streams............................................................ ......................... 122.45(h)
Introduction of New Pollutants - POTW....................................... ................... 122.42(b)
Issuance and Effective Dates..................................................... ....................... 124.15
124.60
Mass Limitations................................................................... ........................... 122.45(f)
Maximum Daily Discharge Limitations........................................ ................... 122.2
Metals................................................................................ ............................... 122.45(c)
Minor Modifications............................................................... .......................... 122.62
Modifications....................................................................... ............................. 122.62
122.5
Monitoring and Recording........................................................ ....................... 122.48(b)
Monitoring and Records.......................................................... ......................... 122.41(j)
Monitoring Reports....................................................... ............................. 122.41(l)(4)
Requirements............................................................... ............................... 122.44(i)
Record keeping............................................................ ............................... 122.21(o)
Monitoring Waiver (for guideline-listed pollutants) ........................................ 122.44(a)(2)
NPDES - Definition.............................................................. ............................ 122.2
National Environmental Policy Act............................................. .................... 122.49(g)
National Historic Preservation Act.............................................. ..................... 122.49(b)
Navigation........................................................................... ............................. 122.44(q)
124.58
Need to Halt or Reduce Activity Not a Defense.............................. ................ 122.41(c)
Net/Gross............................................................................ .............................. 122.45(g)
New Discharger - Definition..................................................... ....................... 122.2
New Source - Application POTW............................................... ..................... 122.21(j)
Application industrial..................................................... ............................ 122.21(k)
Criteria...................................................................... .................................. 122.29(b)
Definition................................................................... ................................. 122.2
Appendix A – Permit Writer’s Manual Appendices
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