Desert Basin Generating Station - Casa Grande Permit Summary

These flashcards cover key regulatory terms and concepts relevant to the Desert Basin Generating Station's environmental permit and operational compliance.

Salt River Project Agricultural Improvement and Power District

A political subdivision of the State of Arizona that owns and operates the Desert Basin Generating Station.

SIC Code 4911

Standard Industrial Classification code for electric services, which applies to the facility.

NAICS Code 221100

North American Industry Classification System code for electric power generation.

Desert Basin Generating Station (DBGS)

An electrical power plant located in Casa Grande, Arizona.

Non-attainment area for PM10

A designation given to an area that does not meet national air quality standards for particulate matter with a diameter of 10 micrometers or less.

Combined cycle system (CCS)

A power generation system that uses both gas and steam turbines to generate electricity, enhancing efficiency.

Simple cycle combustion turbines (SCCT)

Gas turbines that convert the energy in fuel directly to electricity without utilizing a steam cycle.

Actual-to-Potential (ATP) analysis

A comparison method used to determine applicability for major modifications based on emissions increases.

Prevention of Significant Deterioration (PSD)

A regulatory provision requiring preconstruction review of major sources of air pollution to preserve air quality.

Best Available Control Technology (BACT)

The maximum degree of reduction of emissions of a pollutant that is economically achievable.

National Emission Standards for Hazardous Air Pollutants (NESHAP)

Federal regulations to control emissions of hazardous air pollutants.

Acid Rain Program

A program established to reduce acid rain-causing emissions, primarily sulfur dioxide and nitrogen oxides.

Continuous emissions monitoring (CEMS)

A system for continuously monitoring the emissions from a facility in real-time.

Opacity limits

Standards that limit the amount of light blocked by emissions as they exit a source.

Fugitive dust

Dust that is not emitted from a defined source but originates from open areas, transportation, and other activities.

SO2 emission limitation

Rules and thresholds governing the release of sulfur dioxide from the facility.

Particulate Matter (PM10/PM2.5)

Small particles in the air that can have serious health effects when inhaled.

Compliance reporting

The process of documenting and reporting compliance with air quality regulations and permit requirements.

Salt River Project Agricultural Improvement and Power District

A political subdivision of the State of Arizona that owns and operates the Desert Basin Generating Station.

SIC Code 4911

Standard Industrial Classification code for electric services, which applies to the facility.

NAICS Code 221100

North American Industry Classification System code for electric power generation.

Desert Basin Generating Station (DBGS)

An electrical power plant located in Casa Grande, Arizona.

Non-attainment area for PM10

A designation given to an area that does not meet national air quality standards for particulate matter with a diameter of 10 micrometers or less.

Combined cycle system (CCS)

A power generation system that uses both gas and steam turbines to generate electricity, enhancing efficiency.

Simple cycle combustion turbines (SCCT)

Gas turbines that convert the energy in fuel directly to electricity without utilizing a steam cycle.

Actual-to-Potential (ATP) analysis

A comparison method used to determine applicability for major modifications based on emissions increases.

Prevention of Significant Deterioration (PSD)

A regulatory provision requiring preconstruction review of major sources of air pollution to preserve air quality.

Best Available Control Technology (BACT)

The maximum degree of reduction of emissions of a pollutant that is economically achievable.

National Emission Standards for Hazardous Air Pollutants (NESHAP)

Federal regulations to control emissions of hazardous air pollutants.

Acid Rain Program

A program established to reduce acid rain-causing emissions, primarily sulfur dioxide and nitrogen oxides.

Continuous emissions monitoring (CEMS)

A system for continuously monitoring the emissions from a facility in real-time.

Opacity limits

Standards that limit the amount of light blocked by emissions as they exit a source.

Fugitive dust

Dust that is not emitted from a defined source but originates from open areas, transportation, and other activities.

SO2 emission limitation

Rules and thresholds governing the release of sulfur dioxide from the facility.

Particulate Matter (PM10/PM2.5)

Small particles in the air that can have serious health effects when inhaled.

Compliance reporting

The process of documenting and reporting compliance with air quality regulations and permit requirements.

Nitrogen Oxides (NO_x) Emission Limit

The concentration limit for nitrogen oxides emissions, typically set at 2.0 ppmvd at 15\% O_2 for combined cycle units.

Carbon Monoxide (CO) Emission Limit

The allowable concentration of carbon monoxide, often limited to 2.0 ppmvd to 4.0 ppmvd to ensure combustion efficiency.

Ammonia Slip (NH_3) Limit

The maximum concentration of unreacted ammonia allowed to exit the Selective Catalytic Reduction system, typically capped at 5 to 10 ppmvd.

Volatile Organic Compounds (VOC) Emission Limit

The threshold for VOC emissions, generally restricted to approximately 1.2 ppmvd to mitigate ozone formation.

Startup and Shutdown (SSM) Limits

Alternative mass-based emission limits, measured in pounds per event, that apply when the turbines are not

Salt River Project Agricultural Improvement and Power District

A political subdivision of the State of Arizona that owns and operates the Desert Basin Generating Station.

SIC Code 4911

Standard Industrial Classification code for electric services, which applies to the facility.

NAICS Code 221100

North American Industry Classification System code for electric power generation.

Desert Basin Generating Station (DBGS)

An electrical power plant located in Casa Grande, Arizona.

Non-attainment area for PM_{10}

A designation given to an area that does not meet national air quality standards for particulate matter with a diameter of 10 micrometers or less.

Combined cycle system (CCS)

A power generation system that uses both gas and steam turbines to generate electricity, enhancing efficiency.

Simple cycle combustion turbines (SCCT)

Gas turbines that convert the energy in fuel directly to electricity without utilizing a steam cycle.

Actual-to-Potential (ATP) analysis

A comparison method used to determine applicability for major modifications based on emissions increases.

Prevention of Significant Deterioration (PSD)

A regulatory provision requiring preconstruction review of major sources of air pollution to preserve air quality.

Best Available Control Technology (BACT)

The maximum degree of reduction of emissions of a pollutant that is economically achievable.

National Emission Standards for Hazardous Air Pollutants (NESHAP)

Federal regulations to control emissions of hazardous air pollutants.

Acid Rain Program

A program established to reduce acid rain-causing emissions, primarily sulfur dioxide and nitrogen oxides.

Continuous emissions monitoring (CEMS)

A system for continuously monitoring the emissions from a facility in real-time.

Opacity limits

Standards that limit the amount of light blocked by emissions as they exit a source.

Fugitive dust

Dust that is not emitted from a defined source but originates from open areas, transportation, and other activities.

SO_2 emission limitation

Rules and thresholds governing the release of sulfur dioxide from the facility.

Particulate Matter (PM{10}/PM{2.5})

Small particles in the air that can have serious health effects when inhaled.

Compliance reporting

The process of documenting and reporting compliance with air quality regulations and permit requirements.

Nitrogen Oxides (NO_x) Emission Limit

The concentration limit for nitrogen oxides emissions, typically set at 2.0 ppmvd at 15\% O_2 for combined cycle units.

Carbon Monoxide (CO) Emission Limit

The allowable concentration of carbon monoxide, often limited to 2.0 ppmvd to 4.0 ppmvd to ensure combustion efficiency.

Ammonia Slip (NH_3) Limit

The maximum concentration of unreacted ammonia allowed to exit the Selective Catalytic Reduction system, typically capped at 5 to 10 ppmvd.

Volatile Organic Compounds (VOC) Emission Limit

The threshold for VOC emissions, generally restricted to approximately 1.2 ppmvd to mitigate ozone formation.

Startup and Shutdown (SSM) Limits

Alternative mass-based emission limits, measured in pounds per event, that apply when the turbines are not in steady-state operation.

Greenhouse Gas (GHG) Emission Limit

The maximum allowable emissions of carbon dioxide equivalents (CO_2e), often expressed in tons per year to control climate impact.

Fuel Sulfur Content Limit

A restriction on the amount of sulfur in the natural gas fuel, typically limited to 0.5 grains per 100 standard cubic feet.

Maximum Heat Input Rate

The highest rate of fuel energy consumption allowed, measured in Million British Thermal Units per hour (MMBtu/hr).

Selective Catalytic Reduction (SCR)

An active emissions control system that uses a catalyst and ammonia to convert nitrogen oxides into nitrogen and water.

Oxidation Catalyst

A control device used to reduce carbon monoxide (CO) and volatile organic compounds (VOCs) by promoting oxidation.

Cooling Tower Drift Rate

The percentage of circulating water that escapes as droplets, regulated to limit particulate matter (PM_{10}) emissions from cooling towers.

Performance Stack Testing

Periodic physical testing procedures used to verify that a source's emissions comply with permit limits.

Excess Emissions Report

A required report submitted to regulatory agencies whenever emissions exceed the standards