SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT
 

RULE 20.1. NEW SOURCE REVIEW - GENERAL PROVISIONS

(Adopted & Effective: 5/17/94; Rev. Effective 12/17/97)
 
 

(a)     APPLICABILITY

Except as provided in Rule 11 or Section (b) of this rule, this rule applies to any new or modified emission unit, any replacement emission unit, any relocated emission unit or any portable emission unit for which an Authority to Construct or Permit to Operate is required pursuant to Rule 10, or for which a Determination of Compliance is required pursuant to Rule 20.5.

(b)     EXEMPTIONS

Except as provided below, the provisions of Rules 20.1, 20.2, 20.3 and 20.4 shall not apply to:
 

  1. Any emission unit for which a permit is required solely due to a change in Rule 11, provided the unit was operated in San Diego County at any time within one year prior to the date on which the permit requirements became applicable to the unit and provided a District permit application for the unit is submitted within one year after the date upon which permit requirements became applicable to the unit. An emission unit to which this subsection applies shall be included in the calculation of a stationary source's aggregate potential to emit, as provided in Subsection (d)(1)(ii).
  2. The following changes, provided such changes are not contrary to any permit condition, and the change does not result in an increase in the potential to emit of any air contaminant not previously emitted:

  3.  
    (i) Repair or routine maintenance of an existing emission unit.

    (ii) A change of ownership.

    (iii) An increase in the hours of operation.

    (iv) Use of alternate fuel or raw material.

 
  1. Portable and stationary abrasive blasting equipment for which the California Air Resources Board (ARB) has established standards pursuant to Sections 41900 and 41905 of the Health and Safety Code, and which comply with the requirements of 17 CCR Section 92000 et. seq. This exemption shall not apply if the abrasive blasting equipment would be, by itself, a major stationary source, nor to any equipment used in conjunction with the abrasive blasting equipment the use of which may cause the issuance of air contaminants.
  2. Oxides of nitrogen (NOx) emission increases from new, modified or replacement emission units subject to the requirements of Rule 69(d)(6) shall not be subject to the offset provisions of Subsection (d)(5) of Rule 20.2 or of Subsections (d)(5) and (d)(8) of Rule 20.3. Only those NOx emission increases in compliance with Rule 69 and associated with generating capacity which the California Energy Commission or California Public Utilities Commission or their successor, as applicable, has determined a need for shall be eligible for this exemption.
  3. Piston engines used at airplane runways at military bases and which engines are used exclusively for purposes of hoisting cable to assist in the capture of errant aircraft during landings.
  4. Air compressors used exclusively to pressurize nuclear reactor containment domes, provided the compressors are not operated more than 50 hours over any two-year period, and that the compressors satisfy the Air Quality Impact Analysis (AQIA) provisions of Subsections (d)(2) of Rules 20.2 and 20.3, as applicable.
  5. Applications for modified Authority to Construct or modified Permit to Operate which are for the sole purpose of reducing an emission unit's potential to emit and which will not result in a modified emission unit, a modified stationary source or an actual emission reduction calculated pursuant to Rule 20.1(d)(4)(ii) shall be exempt from the Best Available Control Technology (BACT), Lowest Achievable Emission Rate (LAER), AQIA and Emission Offset provisions of Rules 20.1, 20.2, 20.3 and 20.4.
(c) DEFINITIONS

For purposes of Rules 20.1, 20.2, 20.3, 20.4 and 20.5, the following definitions shall apply:
 

  1. "Actual Emissions" means the emissions of an emission unit calculated pursuant to Subsection (d)(2) of this rule.
  2. "Actual Emission Reductions" means emission reductions which are real, surplus, enforceable, and quantifiable and may be permanent or temporary in duration. Actual emission reductions shall be calculated pursuant to Subsection (d)(4) of this rule.
  3. "Aggregate Potential to Emit" means the sum of the post-project potential to emit of all emission units at the stationary source, calculated pursuant to Section (d) of this rule.
  4. "Air Contaminant Emission Control Project" means any activity or project undertaken at an existing emission unit which, as its primary purpose, reduces emissions of air contaminants from such unit in order to comply with a District, ARB or federal Environmental Protection Agency (EPA) emission control requirement. Such activities or projects do not include the replacement of an existing emission unit with a newer or different unit, or the reconstruction of an existing emission unit, or a modification or replacement of an existing emission unit to the extent that such replacement, reconstruction, or modification results in an increase in capacity of the emissions unit, or any air contaminant emission control project for a new or modified emission unit which project is proposed to meet New Source Review Rules 20.1, 20.2, 20.3 and 20.4, or Banking Rules 26.0 through 26.10.
 
  1. "Air Quality Impact Analysis (AQIA)" means an analysis of the air quality impacts of the air contaminant emissions from an emission unit or a stationary source, as applicable, conducted by means of modeling approved by the Air Pollution Control Officer. Methods other than modeling may be used, as the Air Pollution Control Officer and the federal EPA may approve. An AQIA shall include an analysis of the impacts on State and National Ambient Air Quality Standards.
  2. "Air Quality Increment" means any of the following maximum allowable cumulative increases in air contaminant concentration from all increment consuming and increment expanding sources (see Tables 20.1-1 and 20.1-2).
 
TABLE 20.1 - 1 
Air Quality Increments 
(Class I Areas)
Air Contaminant  

Nitrogen Dioxide (NO2 
Annual arithmetic mean

Increment  
 

2.5 µg/m3

Sulfur Dioxide (SO2 
Annual arithmetic mean  
24-hr. maximum  
3-hr. maximum
2.0 µg/m3  
5.0 µg/m3  
25.0 µg/m3
Particulate Matter (PM10)  

Annual arithmetic mean  
24-hr. maximum

4.0 µg/m3  
8.0 µg/m3
 
TABLE 20.1 - 2 
Air Quality Increments 
(Class II Areas)
Air Contaminant  

Nitrogen Dioxide (NO2)  
Annual arithmetic mean

Increment  
 

2.5 µg/m3

Sulfur Dioxide (SO2 

Annual arithmetic mean  
24-hr. maximum  
3-hr. maximum

20.0 µg/m3  
91.0 µg/m3  
512.0 µg/m3
Particulate Matter (PM10)  

Annual arithmetic mean  
24-hr. maximum

17.0 µg/m3  
30.0 µg/m3
 
 
  1. "Area Fugitive Emissions" means fugitive emissions of particulate matter (PM10) which occur as a result of drilling, blasting, quarrying, stockpiling, front end loader operations and vehicular travel of haul roads used to move materials to, from or within a stationary source.
  2. "Attainment" means designated as attainment of the National Ambient Air Quality Standards (NAAQS) pursuant to Section 107(d) of the federal Clean Air Act or of the State Ambient Air Quality Standards (SAAQS) pursuant to Section 39608 of the California Health and Safety Code, as applicable.
  3. "Baseline Concentration" means the ambient concentration of an air contaminant for which there is an air quality increment, which existed in an impact area on the major and non-major source baseline dates. As specified by 40 CFR §52.21(b)(13), the baseline concentration includes the impact of actual emissions from any stationary source in existence on the baseline date and the impacts from the potential to emit of Prevention of Significant Deterioration (PSD) stationary sources which commenced construction but were not in operation by the baseline date. The baseline concentration excludes impacts of actual emission increases and decreases at any stationary source occurring after the baseline date and actual emissions from any PSD stationary source which commenced construction after January 6, 1975. There are two baseline concentrations for any given impact area, a baseline concentration as of the major source baseline date and a baseline concentration as of the non-major source baseline date.
  4. "Baseline Date" means either the major source baseline date or non-major source baseline date, as applicable.
  5. "Best Available Control Technology (BACT)" means and is applied as follows:
 
    (i)The lowest emitting of any of the following:
        (ii) For modified emission units, the entire emission unit's post-project potential to emit shall be subject to BACT, except as follows. The provisions of this Subsection (c)(10)(ii) shall not apply to relocated or replacement emission units.
      (iii) In no event shall application of BACT result in the emission of any air contaminant which would exceed the emissions allowed by any District rule or regulation, or by any applicable standard under 40 CFR Part 60 (New Source Performance Standards) or 40 CFR Part 61 (National Emission Standards for Hazardous Pollutants). Whenever feasible, the Air Pollution Control Officer may stipulate an emission limit as BACT instead of specifying control equipment. In making a BACT determination, the Air Pollution Control Officer shall take into account those environmental and energy impacts identified by the applicant.
     
  1.  "Class I Area" means any area designated as Class I under Title I, Part C of the federal Clean Air Act. As of May 17, 1994, the Agua Tibia National Wilderness Area was the only area so designated within San Diego County. As of May 17, 1994, the following were the only designated Class I areas within 100 km of San Diego County (see Table 20.1-3):
 
TABLE 20.1 - 3 
Class I Areas
Class I Area Approximate Location
Agua Tibia Wilderness Area  
Cucamonga Wilderness Area  
Joshua Tree Wilderness Area  
San Gabriel Wilderness Area  
San Gorgonio Wilderness Area  
San Jacinto Wilderness Area
San Diego County  
80 km North - San Bernardino County  
40 km NE - Riverside County  
90 km NW - Los Angeles County  
70 km North - San Bernardino County  
30 km North - Riverside County
 
  1.  "Class II Area" means any area not designated as a Class I area.
  2. "Commenced Construction" means that the owner or operator of a stationary source has an Authority to Construct or a Determination of Compliance issued pursuant to these rules and regulations and either has:
 
  1.  "Construction" means any physical change or change in the method of operation, including fabrication, erection, installation, demolition or modification of an emission unit, which would result in a change in actual emissions.
  2. "Contemporaneous Emissions Increase" means the sum of emission increases from new or modified emission units occurring at a stationary source within the calendar year in which the subject emission unit(s) is expected to commence operation and the preceding four calendar years, including all other emission units with complete applications under District review and which are expected to commence operation within such calendar years. The sum of emission increases may be reduced by the following:
 
  1.  "Contiguous Property" means two or more parcels of land with a common boundary or separated solely by a public or private roadway or other public or private right-of-way. Non-adjoining parcels of land which are connected by a process line, conveyors or other equipment shall be considered to be contiguous property. Non-adjoining parcels of land separated by bodies of water designated "navigable" by the U.S. Coast Guard, shall not be considered contiguous properties.
  2. "Cost-Effective" means that the annualized cost in dollars per pound of emissions of air contaminant(s) reduced does not exceed the highest cost per pound of emissions reduced by other control measures required to meet stationary source emission standards contained in these rules and regulations, for the specific air contaminant(s) under consideration, multiplied by the BACT Cost Multiplier indicated in Table 20.1- 4. When determining the highest cost per pound of emissions reduced by other control measures, the cost of measures used to comply with the requirements of New Source Review shall be excluded.
 
TABLE 20.1 - 4 
BACT Cost Multiplier
Stationary Source's Post-Project Aggregate  
Potential to Emit
BACT  
Cost Multiplier
Potential < 15 tons/year  
Potential > 15 tons/year
1.1  
1.5
 
 
  1.  "Emergency Equipment" means an emission unit used exclusively to drive an electrical generator, an air compressor or a pump in emergency situations, except for operations up to 52 hours per calendar year for non-emergency purposes. Emission units used for supplying power for distribution to an electrical grid shall not be considered emergency equipment.
  2. "Emergency Situation" means an unforeseen electrical power failure from the serving utility or of on-site electrical transmission equipment such as a transformer, an unforeseen flood or fire, or a life-threat ening situation. In addition, operation of emergency generators at Federal Aviation Administration licensed airports for the purpose of providing power in anticipation of a power failure due to severe storm activity shall be considered an emergency situation. Emergency situations do not include operation for purposes of supplying power for distribution to an electrical grid, operation for training purposes, or other foreseeable event.
  3. "Emission Increase" means an increase in the potential to emit, calculated pursuant to Subsection (d)(3).
  4. "Emission Unit" means any article, machine, equipment, contrivance, process or process line, which emit(s) or reduce(s) or may emit or reduce the emission of any air contaminant.
  5. "Emission Offsets" means emission reductions used to mitigate emission increases, calculated pursuant to Subsection (d)(5).
  6. "Enforceable" means capable of being enforced by the District, including through either the SIP or inclusion of conditions on an Authority to Construct, Permit to Operate, Determination of Compliance or Emission Reduction Credit (ERC) Certificate.
  7. "Essential Public Services" means any of the following:
 
  1.  "Federally Enforceable" means, for purposes of permitting new or modified sources, can be enforced by the federal EPA including through either the SIP or terms and conditions of an Authority to Construct or Permit to Operate as they apply to the following requirements:
 
  1. "Federal Land Manager" means the National Park Service's Western Regional Director, the U.S. Forest Service's Pacific Southwest Regional Air Program Manager and the U.S. Fish and Wildlife Service.
  2. "Fugitive Emissions" means those quantifiable emissions which could not reasonably pass through a stack, chimney, flue, vent or other functionally equivalent opening.
  3. "Impact Area" means the circular area with the emission unit as the center and having a radius extending to the furthest point where a significant impact is expected to occur, not to exceed 50 kilometers.
  4. "Increment Consuming" means emission increases which consume an air quality increment. Emission increases which consume increment are those not accounted for in the baseline concentration, including:
 
  1.  "Increment Expanding" means actual emission reductions which increase an available air quality increment. Actual emission reductions which increase available increment include:
   
  1.  "Lowest Achievable Emission Rate (LAER)" means and is applied as follows:
   
  1.  "Major Modification" means a physical or operational change which results, or may result, in a contemporaneous emissions increase at an existing major stationary source which source is major for the pollutant for which there is a contemporaneous emissions increase, equal to or greater than any of the emission rates listed in Table 20.1 - 5.
 
TABLE 20.1 - 5 
Major Modification
Air Contaminant: Emission Rate (Ton/yr)
Particulate Matter (PM10)  
Oxides of Nitrogen (Nox)  
Volatile Organic Compounds (VOC)  
Oxides of Sulfur (Sox)  
Carbon Monoxide (CO)  
Lead (Pb)
15  
25  
25  
40  
100  
0.6
 
 
  1.  "Major Source Baseline Date" means January 6, 1975 for sulfur dioxide (SO2) and particulate matter (PM10), and February 8, 1988 for nitrogen dioxide (NO2).
  2. "Major Stationary Source" means any emission unit or stationary source which has, or will have after issuance of a permit, an aggregate potential to emit one or more air contaminants, including fugitive emissions, in amounts equal to or greater than any of the emission rates listed in Table 20.1 - 6.
 
TABLE 20.1 - 6 
Major Stationary Source 
Federal Serious Ozone Non-Attainment Area
Air Contaminant: Emission Rate (Ton/yr)
Particulate Matter (PM10)  
Oxides of Nitrogen (Nox)  
Volatile Organic Compounds (VOC)  
Oxides of Sulfur (Sox)  
Carbon Monoxide (CO)  
Lead (Pb)
100  
50  
50  
100  
100  
100
 
 
  1.  "Military Tactical Support Equipment" means any equipment owned by the U.S Department of Defense or the National Guard and used in combat, combat support, combat service support, tactical or relief operations, or training for such operations.
  2. "Modeling" means the use of an applicable ARB or federal EPA approved air quality model to estimate ambient concentrations of air contaminants or to evaluate other air quality related data. Applicable state or federal guidelines shall be followed when performing modeling.
  3. "Modified Emission Unit" means any physical or operational change which results or may result in an increase in an emission unit's potential to emit, including those air contaminants not previously emitted. The following shall not be considered a modified emission unit, provided such a change is not contrary to any permit condition, and the change does not result in an increase in the potential to emit of any air contaminant:
 
    (i)The movement of a portable emission unit f r om one stationary source to another.

    (ii) Repair or routine maintenance of an existing emission unit.

    (iii) An increase in the hours of operation.

    (iv) Use of alternate fuel or raw material.

 
  1.  "Modified Stationary Source" means a stationary source where a new or modified emission unit is or will be located or where a change in the aggregation of emission units occurs, including, but not limited to, the movement of a relocated emission unit to or from a stationary source or where a modification of an existing unit occurs. The following shall not be considered a modification of a stationary source:
   
  1. "National Ambient Air Quality Standards (NAAQS)" means maximum allowable ambient air concentrations for specified air contaminants and monitoring periods as established by the federal EPA (see Table 20.1 - 7).
TABLE 20.1 - 7
 
California and National Ambient Air Quality Standards
California Standards National Standards
Pollutant Averaging Time Concentration Method Primary Secondary Method
Ozone 1 Hour 0.09 ppm - 0.12 ppm  

(235 µg/m3)

Same as Primary Ethylene Chemiluminescence
Carbon Monoxide 8 Hour 9.0 ppm  

(10mg/m3)

Non-Dispersive Infrared Spectroscopy  

(NDIR)

9 ppm (10mg/m3) Non-Dispersive Infrared Spectroscopy  

(NDIR)

1 Hour  20 ppm  

(23 mg/m3)

35 ppm  

(40 mg/m3)

Nitrogen  

Dioxide

Annual Average Gas Phase Chemiluminescence 0.053 ppm (100 µg/m3) Same as Primary  

Standards

Gas Phase Chemiluminescence
1 Hour 0.25 ppm  

(470 µg/m3)

Sulfur Dioxide Annual Average  
 
 
 
 
 

Ultraviolet  

Fluorescence

80 µg/m3  

(0.03 ppm)

 
 
 
 
 
 
 
 

Pararosaniline

24 Hour 0.04 ppm  

(105 µg/m3)

365 µg/m3  

(0.14 ppm)

3 Hour 1300 µg/m3  

(0.5 ppm)

1 Hour 0.25 ppm  

(655 µg/m3)

Suspended Particulate Matter (PM10) Annual Mean 30 µg/m3 Size Selective Inlet High Volume Sampler 50 µg/m3 High Volume Sampling
24 Hour 50 µg/m3 150 µg/m3
Sulfates 24 Hour 25 µg/m3 Turbidimetric Barium Sulfate
Lead 30-Day Average 1.5 µg/m3 Atomic Absorption Atomic Absorption
Calendar Quarter 1.5 µg/m3 Same as Primary
Hydrogen Sulfide 1 Hour 0.03 ppm  

(42 µg/m3)

Cadmium Hydroxide Stractan
Vinyl Chloride  

(Chloroethene)

24 Hour 0.010 ppm  

(26 µg/m3)

Tedlar Bag Collection, Gas Chromatography
Visibility Reducing Particles 1 Observation Insufficient amount to produce an extinction coefficient of 0.23 per kilometer due to particles when relative humidity <70%. Measurement in accordance with ARB Method V.
Notes to Table 20. 1-7  

1. California standards, other than ozone, carbon monoxide, sulfur dioxide (1 hour), nitrogen dioxide and particulate matter (PM10) are values that are not to be equaled or exceeded. The ozone, carbon monoxide, sulfur dioxide (1 hour),nitrogen dioxide, and particulate matter (PM10) standards are not to be exceeded.

2. National standards, other than ozone and those based on annual averages or annual geometric means, are not to be exceeded more than once a year. The ozone standard is attained when the expected number of days per calendar year with maximum hourly average concentrations above standard is equal to or less than one.
3. Concentration expressed first in units in which it was promulgated. Equivalent units given in parentheses are based upon a reference temperature of 25 oC and a reference pressure of 760 mm of mercury. All measurement of air quality are to be corrected to a reference temperature of 25oC and a reference pressure of 760 mm pf mercury (1,013.2 millibar). Ppm in this table refers to ppm by volume or micro moles of pollutant per mole of gas.
4. Any equivalent procedure that can be shown to be satisfaction of the Air Resources Board to give equivalent results at or near the level of the air quality standard may be used.
5. National Primary Standards: The levels of air quality necessary, with a adequate margin of safety, to protect the public health. Each state must attain the primary standards with in a specified number of years after that state's implementation plan is approved by the Environmental Protection Agency (EPA).
6. National Secondary Standards: The levels of air quality necessary to protect the public welfare from any known or anticipated adverse affects of a pollutant. Each state must attain the secondary standards within a "reasonable time" after the implementation plan is approved by the EPA.
7. Reference method as described by the EPA: An"equivalent Method" of measurement may be used but must have a "consistent relationship to the reference method" and must be approved by the EPA.
8. Prevailing visibility is defined as the greatest visibility that is attained or surpassed around at least half of the horizon circle but not necessarily in continuous sector.
9. The annual PM10 state standard is based on the geometric mean of all reported values taken during the year. The annual PM10 national standard is based on averaging the quarterly arithmetic means.
 
 
  1.  "New Emission Unit" means any of the following:
   
  1.  "New Major Stationary Source" means a new emission unit or new stationary source which will be a major stationary source.
  2. "New Stationary Source" means a stationary source which prior to the project under review, did not contain any other permitted equipment.
  3. "Non-Criteria Pollutant Emissions Significance Level" means a contemporaneous emissions increase occurring at any new or modified PSD stationary source, equal to or greater than the amounts listed in Table 20.1 - 8.
 
TABLE 20.1 - 8 
Non-Criteria Pollutant Emissions Significance Levels
Air contaminant: Emission Rate  
(Ton/yr)
Asbestos  

Beryllium  

Fluorides  

Hydrogen Sulfide (H2S)  

Mercury  

Reduced Sulfur Compounds  

Sulfuric Acid Mist  

Vinyl Chloride  

Trichlorofluoromethane (CFC-11)  

Dichlorodifluoromethane (CFC-12)  

Trichlorotrifluoromethane (CFC-113)  

Dichlorotetrafluoroethane (CFC-114)  

Chloropentafluoroethane (CFC-115)  

Bromochlorodifluoromethane (Halon - 1191)  

Dibromotetrafluoroethane (Halon - 2402) 

0.007  

0.0004  

 

10  

0.1  

10  

 

 

100  

100  

100  

100  

100  

100  

100

 
 
  1.  "Non-Major Source Baseline Date" means December 8, 1983, for sulfur dioxide (SO2). For particulate matter (PM10) and nitrogen dioxide (NO2), the non-major source baseline date is the date after August 7, 1977, or February 8, 1988, respectively, when the first Authority to Construct application for any stationary source which will be a PSD Major Stationary Source for PM10 or NOx or which is a PSD Major Modification for PM10 or NOx as applicable, is deemed complete. As of May 17, 1994, neither the particulate matter nor the nitrogen dioxide non-major source baseline date have been established.
  2. "Offset Ratio" means the required proportion of emission offsets to emission increases, as specified in Rules 20.2, 20.3 or 20.4.
  3. "Particulate Matter or Particulate Matter (PM10)" means particulate matter with an aerodynamic diameter less than or equal to a nominal 10 microns. For non-fugitive emissions, any applicable test method approved by the federal EPA, the state ARB and the Air Pollution Control Officer shall be used to measure PM10. The Air Pollution Control Officer may require the use of an applicable test method prior to final approval by EPA and ARB if the Officer determines that the method is consistent with these rules, or results in an improved measure of PM10 emissions, and has received written initial concurrence from ARB and EPA for use of the method.
  4. "Permanent" means enforceable and which will exist for an unlimited period of time. For purposes of meeting the emission offset requirements of Rules 20.3 and 20.4, permanent means also federally enforceable.
  5. "Portable Emission Unit" means an emission unit that is designed to be and capable of being carried or moved from one location to another. Indicia of portability include, but are not limited to, wheels, skids, carrying handles, dolly, trailer or platform. For the purposes of this regulation, dredge engines on a boat or barge are considered portable. An emission unit is not portable if any of the following apply:
   
  1.  "Post-Project Potential to Emit" means an emission unit's potential to emit after issuance of an Authority to Construct for the proposed project, calculated pursuant to Section (d).
  2. "Potential to Emit" means the maximum quantity of air contaminant emissions, including fugitive emissions, that an emission unit is capable of emitting or permitted to emit, calculated pursuant to Section (d).
  3. "Precursor Air Contaminants" means any air contaminant which forms or contributes to the formation of a secondary air contaminant for which an ambient air quality standard exists. For purposes of this rule, the precursor relationships are listed in Table
 
TABLE 20.1 - 9 
Precursor Air Contaminants
Precursor Air Contaminant Secondary Air Contaminant
NOx NO2
PM10
Ozone
VOC PM10
Ozone
SOx SO2
PM10
 
 
  1. "Pre-Project Actual Emissions" means an emission unit's actual emissions prior to issuance of an Authority to Construct for the proposed project, calculated pursuant to Section (d).
  2. "Pre-Project Potential to Emit" means an emission unit's potential to emit prior to issuance of an Authority to Construct for proposed project, calculated pursuant to Section (d).
  3. "Project" means an emission unit or aggregation of emission units for which an application or combination of applications for Authority to Construct or modified Permit to Operate is under District review.
  4. "Proven in Field Application" means demonstrated in field application to be reliable, in continuous compliance and maintaining a stated emission level for a period of at least one year, as determined by the Air Pollution Control Officer.
  5. "PSD Modification" means a contemporaneous emissions increase occurring at a modified PSD stationary source equal to or greater than the amounts listed in Table
20.1 - 10 or any non-criteria pollutant emissions significance level.
 
 
TABLE 20.1 - 10 
PSD Modification
Air contaminant: Emission Rate  
(Ton/yr)
Particulate Matter (PM10)  

Oxides of Nitrogen (NOx)  

Volatile Organic Compounds (VOC)  

Oxides of Sulfur (SOx)  

Carbon Monoxide (CO)  

Lead and Lead Compounds (Pb)

15  

40  

40  

40  

100  

0.6

 
 
  1.  "PSD Stationary Source or Prevention of Significant Deterioration Stationary Source" means any stationary source, as specified in Table 20.1 - 11, which has, or will have after issuance of a permit, an aggregate potential to emit one or more air contaminants in amounts equal to or greater than any of the emission rates listed in Table 20.1 - 11.
 
TABLE 20.1 - 11 
PSD Stationary Sources and Trigger Levels 

For stationary sources consisting of:

1. Fossil fuel fired steam electrical plants of more than 250 MM Btu/hr heat input 15. Lime plants 
2. Fossil fuel boilers or combinations thereof totaling more than 250 MM Btu/hr of heat input 16. Nitric acid plants
3. Municipal incinerators capable of charging more than 250 tons of refuse per day 17. Phosphate rock processing plants 
4. Petroleum storage and transfer units with a total storage capacity exceeding 300,000 barrels 18. Petroleum refineries 
5. Charcoal production plants 19. Primary aluminum ore reduction plants
6. Chemical process plants 20. Primary copper smelters
7.Coal cleaning plants with thermal dryers 21. Primary lead smelters
8. Coke oven batteries 22. Primary zinc smelters
9.Fuel conversion plants 23. Portland cement plants
10. Furnace process carbon black plants 24. Secondary metal production plants
11. Glass fiber processing plants 25. Sintering plants
12. Hydrofluoric acid plants 26. Sulfuric acid plants
13. Iron and steel mill plants 27. Sulfur recovery plants
14. Kraft pulp mills 28. Taconite ore processing plants
The following emission rates:
Air Contaminant  

Particulate Matter (PM10)  

Oxides of Nitrogen (NOx)  

Volatile Organic Compounds (VOC)  

Oxides of Sulfur (SOx)  

Carbon Monoxide (CO)

(Ton/yr)  

100  

100  

100  

100  

100

For all other stationary sources:
Air Contaminant  

Particulate Matter (PM10)  

Oxides of Nitrogen (NOx)  

Volatile Organic Compounds (VOC)  

Oxides of Sulfur (SOx)  

Carbon Monoxide (CO)

(Ton/yr)  

250  

250  

250  

250  

250

 
 
  1. "Quantifiable" means that a reliable basis to estimate emission reductions in terms of both their amount and characteristics can be established, as determined by the Air Pollution Control Officer. Quantification may be based upon emission factors, stack tests, monitored values, operating rates and averaging times, process or production inputs, mass balances or other reasonable measurement or estimating practices.
  2. "Real" means actually occurring and which will not be replaced, displaced or transferred to another emission unit at the same or other stationary source within San Diego County, as determined by the Air Pollution Control Officer.
  3. "Reasonably Available Control Technology" or "RACT" means the lowest emission limit that a particular source is capable of meeting by the application of control technology that is reasonably available, as determined by the Air Pollution Control Officer pursuant to the federal Clean Air Act, considering technological and economic feasibility.
  4. "Relocated Emission Unit" means a currently permitted emission unit or grouping of such units which is to be moved within San Diego County from one stationary source to another stationary source. The moving of a portable emission unit shall not be considered a relocated emission unit.
  5. "Replacement Emission Unit" means an emission unit which supplants another emission unit where the replacement emission unit serves the same function and purpose as the emission unit being replaced, as determined by the Air Pollution Control Officer. Identical replacements as specified in Rule 11 shall not be considered to be a replacement emission unit.
  6. "Secondary Emissions" means emissions which would occur as a result of the construction, operation or modification of a PSD stationary source, but which are not directly emitted from any emission unit at the stationary source. Except as provided below, secondary emissions exclude emissions which come directly from mobile sources, such as emissions from the tailpipe of a motor vehicle. Secondary emissions include, but are not limited to:
 
  1.  "Significant Impact" means an increase in ambient air concentration, resulting from emission increases at a new or modified stationary source, equal to or greater than any of the levels listed in Tables 20.1 - 12 and 20.1 - 13:
  2. "State Ambient Air Quality Standards (SAAQS)" means the maximum allowable ambient air concentrations for specified air contaminants and monitoring periods as established by the California ARB (see Table 20.1 - 7).
 
TABLE 20.1 - 12 
Stationary Sources Impacting Any Class I Area
Air Contaminant  

Particulate Matter (PM10)  

Nitrogen Dioxide (NO2 

Sulfur Dioxide (SO2 

Carbon Monoxide (CO)

Significant Impact  

(24-hour Maximum)  

1.0 µg/m3  

1.0 µg/m3  

1.0 µg/m3  

1.0 µg/m3

 
TABLE 20.1 - 13 
Stationary Sources Impacting Any Class II Area
Air Contaminant Significant Impact
Particulate Matter (PM10)  

Annual artithmetic mean  

24-hr. Maximum

1.0 µg/m3  

5.0 µg/m3

Nitrogen Dioxide (NO2)  

Annual arithmetic mean

1.0 µg/m3
Sulfur Dioxide (SO2 

Annual arithmetic mean  

24-hr. maximum

1.0 µg/m3  

5.0 µg/m3

Carbon Monoxide (CO)  

8-hr. maximum  

1-hr. maximum

500 µg/m3  

2000 µg/m3

 
 
  1.  "Stationary Source" means an emission unit or aggregation of emission units which are located on the same or contiguous properties and which units are under common o wnership or entitlement to use. Stationary sources also include those emission units or aggregation of emission units located in the California Coastal Waters.
  2. "Surplus" means the same as defined in Rule 26.0.
  3. "Temporary" means enforceable, existing and valid for a specified, limited period of time. For purposes of meeting the federal emission offset requirements of Rules 20.3 and 20.4, temporary means also federally enforceable.
  4. "Volatile Organic Compound (VOC)" means any volatile compound containing at least one atom of carbon excluding methane, carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, ammonium carbonates, and exempt compounds. Exempt compound means the same as defined in Rule 2.
(d) EMISSION CALCULATIONS
 
  1.  Potential to Emit
 
  1. Actual Emissions

  2. Actual emissions are calculated based on the actual operating history of the emission unit.
   
  1.  Emission Increase

  2. A project's or emission unit's emission increase shall be calculated as follows:
   
  1. Emission Reduction - Potential to Emit & Actual Emission Reduction

  2. A project's or emission unit's emission reduction shall be calculated as follows:
   
  1. Emission Offsets

  2. Emission offsets are actual emission reductions which are provided to mitigate emission increases. Emission offsets must meet the applicable criteria specified in Rules 20.1, 20.2, 20.3 and 20.4.
(e) OTHER PROVISIONS
 
  1.  Continuity of Existing Permits