BACT / TBACT Workbook

Notifying Permit Applicants of a Regulatory Requirement to Use BACT for Emergency Backup Engines greater than or equal to 1000 BHP
The Air District is notifying permit applicants of achieved-in-practice BACT for large emergency backup engines. This would potentially affect engine permit applications under Air District review by requiring engines meet EPA Tier 4 emissions standards. To view the 3/29/2021 webinar, slides, and FAQs, visit the Workshops and Events web page.

The Air District’s Best Available Control Technology and Best Available Control Technology for Toxics Workbook (PDF) is designed to provide guidance on the BACT(83 Kb PDF, 2 pgs, revised 6/9/2015) and TBACT(83 Kb PDF, 2 pgs, revised 6/9/2015) requirements for commonly permitted sources subject to New Source Review in the Bay Area.  Each source subject to these requirements in analyzed on a “case by case” basis to determine compliance with these requirements and not all cases are covered by the guidance.

This workbook serves as a guide for permit applicants, Air District engineers, and others interested in understanding emissions limits, control devices, and techniques needed to meet the BACT(83 Kb PDF, 2 pgs, revised 6/9/2015) New Source Review Rule and TBACT(83 Kb PDF, 2 pgs, revised 6/9/2015) New Source Review of Toxic Air Contaminants Rule.

Section 1: BACT/TBACT Policy and Implementation

• Introduction(88 Kb PDF, 3 pgs, revised 6/9/2015)
• Definition of BACT and TBACT(83 Kb PDF, 2 pgs, revised 6/9/2015)
• Policy and Implementation Procedure(115 Kb PDF, 6 pgs, revised 6/9/2015)
• User's Guide to BACT/TBACT Workbook(84 Kb PDF, 2 pgs, revised 6/9/2015)
• Figure 1: Using the Workbook: Step A(86 Kb PDF, 1 pg, revised 6/9/2015)
• Figure 2: Using the Workbook: Step B(91 Kb PDF, 1 pg, revised 6/9/2015)

Section 2: Combustion Sources

Boilers, Commercial, Industrial, Institutional

• Boiler, Rental: On-site < 6 consecutive months(94 Kb PDF, 1 pg, revised 12/21/2020) 
• Boiler: 5 to <33.5 MMBtu/hr(19 Kb PDF, 2 pgs, revised 12/21/2020) 
• Boiler: ≥33.5 to <50 MMBtu/hr(19 Kb PDF, 2 pgs, revised 12/21/2020)
• Boiler: ≥50 MMBtu/hr (21 Kb PDF, 2 pgs, revised 12/21/2020)
• Boiler, CO - Refinery (95 Kb PDF, 1 pg, revised 12/21/2020)
• Boiler or Water Heater - Landfill or Digester Gas Fired(95 Kb PDF, 1 pg, revised 12/21/2020)
• Boiler - Municipal Refuse Fired(94 Kb PDF, 1 pg, revised 12/21/2020)
• Boiler - Wood Fired(94 Kb PDF, 1 pg, revised 12/21/2020)

Internal Combustion Engines

• I. C. Engine - Compression Ignition, Prime > 50 hp(120 Kb PDF, 2 pgs, revised 12/21/2020)
• I. C. Engine - Compression Ignition, Emergency > 50 hp and < 1000 hp(164 Kb PDF, 2 pgs, posted 2/20/2025)
• I.C. Engine - Compression Ignition, Emergency >= 1000 hp(125 Kb PDF, 2 pgs, posted 12/21/2020)
• I. C. Engine - Biogas Fired ≥ 50 hp(74 Kb PDF, 2 pgs, revised 12/21/2020)
• I. C. Engine - Spark Ignition, Natural Gas Fired Rich Burn Engine(191 Kb PDF, 1 pg, revised 12/21/2020)
• I. C. Engine - Spark Ignition, Natural Gas Fired Lean Burn Engine(190 Kb PDF, 1 pg, revised 12/21/2020)
• I. C. Engine - Spark Ignition, Natural Gas Fired Emergency Engine(136 Kb PDF, 1 pg, revised 12/21/2020)
• I. C. Engines - Spark Ignition, Alternative Fuels(95 Kb PDF, 1 pg, revised 12/21/2020)

Process Heaters

• Heater - Refinery Process, Natural or induced Draft, <50 MMBtu/hr(98 Kb PDF, 2 pgs, revised 12/21/2020)
• Heater - Refinery Process, Forced Draft, <50 MMBtu/hr(98 Kb PDF, 2 pgs, revised 12/21/2020)
• Heater - Refinery Process, >50 MMBtu/hr(91 Kb PDF, 2 pgs, revised 12/21/2020)

Gas Turbines

• Simple Cycle (< 2 .0 MW)(95 Kb PDF, 1 pg, revised 12/21/2020)
• Simple Cycle (>= 2 MW and < 40 MW)(95 Kb PDF, 1 pg, revised 12/21/2020)
• Simple Cycle (>= 40 MW)(96 Kb PDF, 1 pg, revised 12/21/2020)
• Combined Cycle (>= 2 MW and < 40 MW)(95 Kb PDF, 1 pg, revised 12/21/2020)
• Combined Cycle (>= 40 MW)(99 Kb PDF, 2 pgs, revised 12/21/2020)
• Landfill Gas-Fired(95 Kb PDF, 1 pg, revised 12/21/2020)

Steam Generators

• Steam Generator - Oil Field, 5 to <33.5 MMBtu/hr(95 Kb PDF, 1 pg, revised 12/21/2020)
• Steam Generator - Oil Field, >=33.5 to <50 MMBtu/hr(95 Kb PDF, 1 pg, revised 12/21/2020)
• Steam Generator - Oil Field, >=50 MMBtu/hr(95 Kb PDF, 1 pg, revised 12/21/2020)

Cement Kilns

• Cement Kiln(94 Kb PDF, 1 pg, revised 12/21/2020)

Section 3: Petroleum Industry

Bulk Loading Facilities

• Marine, Loading(94 Kb PDF, 1 pg, revised 6/11/2015)
• Tank Truck & Rail Car Bulk Loading (except Gasoline Bulk Terminals)(94 Kb PDF, 1 pg, revised 6/11/2015)
• Tank Truck & Rail Car Bulk Loading - Gasoline Bulk Terminals(93 Kb PDF, 1 pg, revised 6/11/2015)

Gasoline Dispensing Facilities

•  Gasoline Dispensing Facility(94 Kb PDF, 1 pg, revised 6/11/2015)

Oil-water Separators

Water Treating - Oil/Water Separator

•  < 250 Gallons/min(94 Kb PDF, 1 pg, revised 6/11/2015)
•  >= 250 Gallons/min(94 Kb PDF, 1 pg, revised 6/11/2015)
• Water Treating - Sour Water Stripping(94 Kb PDF, 1 pg, revised 6/11/2015)

Petroleum Refinery Fugitive Emissions

• Flare - Refinery(98 Kb PDF, 2 pgs, revised 6/11/2015)
• Flanges(94 Kb PDF, 1 pg, revised 6/11/2015)
• Pressure Relief Valves, Emergency - Process Units(95 Kb PDF, 1 pg, revised 6/11/2015)
• Process Valves(95 Kb PDF, 1 pg, revised 6/11/2015)
• Pumps(97 Kb PDF, 2 pgs, revised 6/11/2015)
• Compressors(97 Kb PDF, 2 pgs, revised 6/11/2015)

Sulfur Recovery Plant

• Sulfur Recovery Plant(94 Kb PDF, 1 pg, revised 6/11/2015)

Section 4: Organic Liquid Storage Tanks

Orgainc Liquid Storage Tanks

Storage Tanks (20,000 gallons or greater)
Storage Tanks < 20,000 gallon capacity

• Storage Tanks - External Floating Roof, Organic Liquids(13 Kb PDF, 1 pg, revised 6/11/2015)
• Storage Tanks - Fixed Roof, Organic Liquids, <20,000 gal(94 Kb PDF, 1 pg, revised 6/11/2015)
• Storage Tanks - Fixed Roof, Organic Liquids, >=20,000 gal(94 Kb PDF, 1 pg, revised 6/11/2015)
• Storage Tanks - Internal Floating Roof, Organic Liquids(95 Kb PDF, 1 pg, revised 6/11/2015)

Section 5: Coating Sources

Aerospace Assembly & Component Coating Ops.

Spray Booth - Coating of Aerospace Components

• <25 lb/day Emissions (Uncontrolled)(95 Kb PDF, 1 pg, revised 6/11/2015)
• >=25 lb/day Emissions (Uncontrolled)(96 Kb PDF, 2 pgs, revised 6/11/2015)

Spray Booth - Coating of Flatwood Paneling & Wood Flat Stock

• <50 lb/day Emissions (Uncontrolled)(96 Kb PDF, 1 pg, revised 6/11/2015)
• >=50 lb/day Emissions (Uncontrolled)(96 Kb PDF, 2 pgs, revised 6/11/2015)

Spray Booth - Coating of Wood Products

• Spray Booth - Coating of Wood Products(97 Kb PDF, 2 pgs, revised 6/11/2015)

Graphic Arts Printing and Coating Operations

• Flexographic Printing Line(97 Kb PDF, 2 pgs, revised 6/11/2015)
• Lithographic Offset Printing - Heatset(99 Kb PDF, 2 pgs, revised 6/11/2015)
• Lithographic Offset Printing - Non-Heatset(99 Kb PDF, 2 pgs, revised 6/11/2015)
• Rotogravure Printing - Publication and Packaging(95 Kb PDF, 1 pg, revised 6/11/2015)
• Screen Printing and Drying (96 Kb PDF, 2 pgs, revised 6/11/2015)

Metal Container, Closure, and Coil Coating

• Metal Container, Closure, and Coil Coating Operation(95 Kb PDF, 1 pg, revised 6/11/2015)

Misc. Metal Parts and Products coating

Spray Booth - Coating of Misc. Metal Parts and Products

• <50 lb/day Emissions (Uncontrolled)(95 Kb PDF, 1 pg, revised 6/11/2015)
• >=50 lb/day Emissions (Uncontrolled)(96 Kb PDF, 2 pgs, revised 6/11/2015)

Misc. Solvent & Surface Coating Operations

Flow Coater, Dip Tank and Roller Coater

• <36 lb/day Emissions (Uncontrolled)(95 Kb PDF, 1 pg, revised 6/11/2015)
• >=36 lb/day Emissions (Uncontrolled)(97 Kb PDF, 2 pgs, revised 6/11/2015)

Motor Vehicle and Mobile Equipment Coating

Spray Booth - Coating of Motor Vehicle & Mobile Equipment,Rework or Bodyshop

• <40 lb/day Emissions (Uncontrolled)(96 Kb PDF, 1 pg, revised 6/11/2015)
• >=40 lb/day Emissions (Uncontrolled)(97 Kb PDF, 2 pgs, revised 6/11/2015)

Ovens (Surface Coating)

Paper, Fabric, and film Coating

Plastic Parts and Products Coating
Spray Booth - Coating of Misc. Plastic Parts and Products

• <50 lb/day Emissions (Uncontrolled)(96 Kb PDF, 1 pg, revised 6/11/2015)
• >=50 lb/day Emissions (Uncontrolled)(96 Kb PDF, 2 pgs, revised 6/11/2015)

Spray Booth - Coating of Misc. Plastic Parts and Products

Motor Vehicle Assembly Plant Coating

Spray Booth - Coating of Motor Vehicles, Assembly Plant

• Spray Booth (Manual Zones)(95 Kb PDF, 1 pg, revised 6/11/2015)
• Spray Booth (Automatic Zones)(97 Kb PDF, 2 pgs, revised 6/11/2015)
• Oven (Topcoat and/or Primer)(96 Kb PDF, 2 pgs, revised 6/11/2015)
• Oven (Sealer and/or Elpo)(96 Kb PDF, 2 pgs, revised 6/11/2015)

Section 6: Solvent Cleaning Sources

Cold Solvent Cleanin

• Degreaser - Cold Solvent Tank(95 Kb PDF, 1 pg, revised 6/11/2015)

Vapor Solvent Cleaning

• Degreaser - Film Cleaning Machine(94 Kb PDF, 1 pg, revised 6/11/2015)
• Degreaser - Solvent Spray Booth(94 Kb PDF, 1 pg, revised 6/11/2015)
• Degreaser - Vapor, Conveyorized(96 Kb PDF, 2 pgs, revised 6/11/2015)
• Degreaser - Vapor, Open Top(97 Kb PDF, 2 pgs, revised 6/11/2015)

Wipe Cleaning

• Wipe Cleaning Operation(96 Kb PDF, 2 pgs, revised 6/11/2015)
• Solvent Reclamation(94 Kb PDF, 1 pg, revised 6/11/2015)

Section 7: Electronic and Semiconductor Industry

Circuit Board Manufacturing

• Circuit Board Etcher - Batch Immersion Type, Subtractive Process(93 Kb PDF, 1 pg, revised 6/11/2015)
• Circuit Board Etcher _ Conveyorized Spray Type, Subtractive Process(93 Kb PDF, 1 pg, revised 6/11/2015)

Electronic Assembly & Wave Soldering Operations

• Wave Solder Operation - Flux Application and Finger Cleaning (97 Kb PDF, 2 pgs, revised 6/11/2015)

Flexible and Rigid Disk Manufacturing

Magnetic Media Manufacturing - Disc Coating, Oxide

• <15 lb/day Emissions (Uncontrolled)(94 Kb PDF, 1 pg, revised 6/11/2015)
• >=15 lb/day Emissions (Uncontrolled)(94 Kb PDF, 1 pg, revised 6/11/2015)

Magnetic Media Manufacturing - Disc Coating, Lubricant

• Dip Luber(95 Kb PDF, 1 pg, revised 6/11/2015)
• Gravity Drop (Drain) Luber(96 Kb PDF, 2 pgs, revised 6/11/2015)
• Spray Luber(94 Kb PDF, 1 pg, revised 6/11/2015)

Magnetic Media Manufacturing - Disc Polishing/Texturing

• <22 lb/day Emissions (Uncontrolled)(94 Kb PDF, 1 pg, revised 6/11/2015)
• >=22 lb/day Emissions (Uncontrolled)(94 Kb PDF, 1 pg, revised 6/11/2015)

Semiconductor Manufacturing Operations

• Semiconductor Fab - Photoresist Operations
  (95 Kb PDF, 1 pg, revised 6/11/2015)
• Semiconductor Fab - Solvent Cleaning Stations(96 Kb PDF, 2 pgs, revised 6/11/2015)
• Semiconductor Fab - Siliconizing Reactors,Furnace Chambers, Vapor Deposition(94 Kb PDF, 1 pg, revised 6/11/2015)

Section 8: Waste Processing Industry

Landfills

• Flare - Digester Gas or Landfill Gas from Non-Hazardous Waste Landfill(94 Kb PDF, 1 pg, revised 6/11/2015)
• Flare - Digester Gas or Landfill Gas from Hazardous Waste Landfill(94 Kb PDF, 1 pg, revised 6/11/2015)
• Landfill Gas Gathering System(93 Kb PDF, 1 pg, revised 6/11/2015)
• Gas Turbine - Landfill Gas-Fired(94 Kb PDF, 1 pg, revised 6/11/2015)

Organic Waste Processing

• Composting(382 Kb PDF, 1 pg, posted 8/18/2016)

Sewage Treatment Facilities Works (POTWs)

• Headworks and Primary Treatment(94 Kb PDF, 1 pg, revised 6/11/2015)
• Conventional Air Activated Sludge(94 Kb PDF, 1 pg, revised 6/11/2015)
• High Purity Oxygen Activated Sludge(94 Kb PDF, 1 pg, revised 6/11/2015)
• Secondary Clarifiers and Tertiary Treatment(94 Kb PDF, 1 pg, revised 6/11/2015)
• Solids Handling Equipment(94 Kb PDF, 1 pg, revised 6/11/2015)
• Digesters and Sludge Holding Tanks(94 Kb PDF, 1 pg, revised 6/11/2015)

Section 9: Soil/Water Remediation Sources

Airstripping

• Air Stripper - Ground Water Treatment(96 Kb PDF, 2 pgs, revised 6/11/2015)

Soil Vapor Extraction

• Soil Vapor Extraction(96 Kb PDF, 2 pgs, revised 6/11/2015)

Section 10: Toxic Sources

Chrome Plating

• Chrome Plating - Decorative Chrome
  (93 Kb PDF, 1 pg, revised 6/11/2015)

Chrome Plating - Hard Chrome

• Rectifier throughput 0 to 6,053,333^amp-hr/yr(94 Kb PDF, 1 pg, revised 6/11/2015)
• Rectifier throughput 6,053,333 to 151,333,333^amp-hr/yr(95 Kb PDF, 1 pg, revised 6/11/2015)
• Rectifier throughput >= 151,333,333^amp-hr/yr(95 Kb PDF, 1 pg, revised 6/11/2015)

Ethylene Oxide Sterilizers

• Ethylene Oxide Sterilization (95 Kb PDF, 1 pg, revised 6/11/2015)

Petroleum Solvent Drycleaning

• Drycleaner - Perchloroethylene
  (95 Kb PDF, 1 pg, revised 6/11/2015)
• Drycleaner - Petroleum Solvent(94 Kb PDF, 1 pg, revised 6/11/2015)

Synthetic Solvent Drycleaning

• Drycleaner - Valclene & Other Synthetic Solvents(95 Kb PDF, 1 pg, revised 6/11/2015)

Incinerators

Hazardous Waste Incineration
Incinerator - Infectious Waste

• < 300 lb/hr(94 Kb PDF, 1 pg, revised 6/11/2015)
• >= 300 lb/hr(95 Kb PDF, 1 pg, revised 6/11/2015)

Incinerator - Non-Infectious Waste

• < 300 lb/hr
  (95 Kb PDF, 1 pg, revised 6/11/2015)
• >= 300 lb/hr to < 750 hr(95 Kb PDF, 1 pg, revised 6/11/2015)
• >= 750 lb/hr(95 Kb PDF, 1 pg, revised 6/11/2015)

Section 11: Miscellaneous Sources

Abrasive Blasting

• Abrasive Blasting - Enclosed (93 Kb PDF, 1 pg, revised 6/11/2015)

Coffee Roaster

• Coffee Roasting < 110,000 Btu/hr(95 Kb PDF, 1 pg, revised 6/11/2015)
• Coffee Roasting 110,000 Btu/hr to 3.5 MM Btu/hr(94 Kb PDF, 1 pg, revised 6/11/2015)
• Coffee Roasting Handling Equipment < 1,590 lb/hr(94 Kb PDF, 1 pg, revised 6/11/2015)
• Coffee Roasting Handling Equipment >= 1,590 lb/hr(94 Kb PDF, 1 pg, revised 6/11/2015)

Crematories

• Crematory(76 Kb PDF, 1 pg, revised 6/11/2015)

Crushing and Grinding

• Rock - Aggregate Processing(94 Kb PDF, 1 pg, revised 6/11/2015)
• Solid Material Handling - Dry(94 Kb PDF, 1 pg, revised 6/11/2015)
• Solid Material Handling - Wet(93 Kb PDF, 1 pg, revised 6/11/2015)
• Solid Material Storage - Enclosed(93 Kb PDF, 1 pg, revised 6/11/2015)
• Solid Material Storage - Open(93 Kb PDF, 1 pg, revised 6/11/2015)
• Wood Processing Equipment(93 Kb PDF, 1 pg, revised 6/11/2015)

Concrete Batch Plant

• < 5 cubic yards per batch(94 Kb PDF, 1 pg, revised 6/11/2015)
• >= 5 cubic yards per batch(81 Kb PDF, 2 pgs, posted 7/29/2021)

Miscellaneous Operations

• Asphalt Batch Plant - Material Handling(94 Kb PDF, 1 pg, revised 6/11/2015)
• Asphalt (Hot Mix) Batch Mix Facilities(98 Kb PDF, 2 pgs, revised 6/11/2015)
• Asphalt (Hot Mix) Drum Mix Facilities(96 Kb PDF, 1 pg, revised 6/11/2015)
• Asphalt (Hot Mix) Drum and Batch Mix Facilities, Asphalt Material Handling (Conveyors and Storage Silos; and Loadout Operations)(305 Kb PDF, 2 pgs, revised 6/11/2015)
• Asphalt Roofing Line(94 Kb PDF, 1 pg, revised 6/11/2015)
• Asphalt Storage Tank(93 Kb PDF, 1 pg, revised 6/11/2015)
• Ball Mill(93 Kb PDF, 1 pg, revised 6/11/2015)
• Bulk Cement - Ship Unloading(93 Kb PDF, 1 pg, revised 6/11/2015)
• Bulk Material - Ship Loading (Non-White (Wet) Commodities)(94 Kb PDF, 1 pg, revised 6/11/2015)
• Bulk Material - Ship Loading (White (Dry) Commodities)(94 Kb PDF, 1 pg, revised 6/11/2015)
• Bulk Solid Material Ship Unloading - Except Cement(93 Kb PDF, 1 pg, revised 6/11/2015)
• Bulk Solid Material Storage - Non-White (Wet) Commodities(94 Kb PDF, 1 pg, revised 6/11/2015)
• Bulk Solid Material Storage - White (Dry) Commodities(94 Kb PDF, 1 pg, revised 6/11/2015)
• Catalyst Manufacturing - Reactor(93 Kb PDF, 1 pg, revised 6/11/2015)
• Catalyst Manufacturing - Rotary Dryer(94 Kb PDF, 1 pg, revised 6/11/2015)
• Catalyst Manufacturing - Spray Dryer(93 Kb PDF, 1 pg, revised 6/11/2015)
• Catalyst Regeneration - Fluidized Catalyst Cracking Unit(94 Kb PDF, 1 pg, revised 6/11/2015)
• Catalyst Regeneration - Hydrocarbon Removal(94 Kb PDF, 1 pg, revised 6/11/2015)
• Catalyst Regeneration and Manufacturing - Calcining(87 Kb PDF, 1 pg, revised 6/11/2015)
• Meat Broiler and Barbecue Oven(88 Kb PDF, 1 pg, revised 6/11/2015)
• Smokehouse(88 Kb PDF, 1 pg, revised 6/11/2015)

Polystyrene Foam Manufacturing

• Polystyrene Foam Sheet for Food Packaging(86 Kb PDF, 1 pg, revised 6/11/2015)

Portable Equipment

Resin Manufacturing

• Polyester Resin Operations - Molding and Casting(88 Kb PDF, 1 pg, revised 6/11/2015)
• Polyester Resin Operations - Hand and Spray Layup(88 Kb PDF, 1 pg, revised 6/11/2015)
• Polyester Resin Operations - Panel Manufacturing(90 Kb PDF, 2 pgs, revised 6/11/2015)
• Polyester Resin Operations - Pultrusion(88 Kb PDF, 1 pg, revised 6/11/2015)

Appendices

• Appendix A - Glossary(82 Kb PDF, 2 pgs, revised 6/11/2015)
• Appendix B1 - Toxics Risk Screening Levels - Carcinogenic, See Reg 2-5
• Appendix B2 - Toxics Risk Screening Levels - Non-carcinogenic, See Reg 2-5
• Appendix C1 -  Cost-Effectiveness Calculations: NOx(95 Kb PDF, 3 pgs, revised 6/11/2015)
• Table C1-1(158 Kb PDF, 2 pgs, revised 6/11/2015)
• Table C1-2(231 Kb PDF, 3 pgs, revised 6/11/2015)
• Appendix C2 -  Cost-Effectiveness Calculations: POC(81 Kb PDF, 1 pg, revised 6/11/2015)
• Figure C2-1(101 Kb PDF, 2 pgs, revised 6/11/2015)
• Appendix D - References(82 Kb PDF, 1 pg, revised 6/11/2015)