United States Environmental Protection Agency

Air Division

Technical Support Document

For The

Kern County Air Pollution Control District

Rule 102, Definitions

Cynthia G. Allen

September 2010
AGENCY: Kern County Air Pollution Control District

Submittal Date: July 20, 2010

Adoption Date: March 11, 2010

Completeness Date: August 25, 2010

Submitted Rule: Rule 102, Definitions

Applicable SIP: Submitted on September 7, 1999 (adopted on July 1, 1999 and 

approved on February 3, 2000) (65 FR 5262)

Rule Summary: 

Kern County Air Pollution Control District (KCAPCD) Rule 102, Definitions, is being 

amended to update the Exempt Compounds list to conform to the Exempt Compounds 

list of the EPA. Four definitions have also been added to the Rule along with 

modifications to Standard Conditions and minor formatting.

Compounds that have low atmospheric photochemical reactions are considered to have a 

negligible level of reactivity. It has been EPA’s policy that organic compounds with a 

negligible level of reactivity do not need to be regulated to reduce ozone. The EPA lists

negligibly reactive compounds in its regulation a (at 40 CFR 51.100(s)) and excludes 

them from the definition of VOCs.

The following list of negligibly reactive compounds has been added to the exempt 

compounds list (Section N): 

 3,3-dichloro-1,1,1,2,2-pentafluoropropane (HCFC-225ca)

 1,3-dichloro-1,1,2,2,3-pentafluoropropane (HCFC-225cb)

 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC 43-10mee)

 Difluorokmethane (HFC-32)

 Ethylfluoride (HFC-161)

 1,1,1,3,3,3-hexafluoropropane (HFC-236fa)

 1,1,2,2,3-pentafluoropropane (HFC-245ca)

 1,1,2,3,3-pentafluoropropane (HFC-245ea)

 1,1,1,2,3-pentafluoropropane (HFC-245eb)

 1,1,1,3,3-pentafluoropropane (HFC-245fa)

 1,1,1,2,3,3-hexafluoropropane (HFC-236ea)

 1,1,1,3,3-pentafluorobutane (HFC-365mfc)

 Chlorofluoromethane (HCFC-31)

 1-chloro-1-fluoroethane (HCFC-151a)

 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a)
 1,1,1,2,2,3,3,4,4-nonafluoro-4methoxy-butane (C4F9OCH3 or HFE-7100)

 2-difluoromethoxymethyl)-1,1,1,2,3,3,3-heptabluoropropane 

(CF3)2CFCF2OCH3)

 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane (C4F9OC2H5 or HFE-7200)

 2-(ethoxydifluoromethyl)-1,1,1,2,3,3,3-heptabluoropropane 

((CF3)2CFCF2OC2H5)

 Methyl Acetate

 1,1,1,2,2,3,3-heptafluoro-3-methoxy-propane (n-C3F7OCH3 or HFE-7000)

 3-ethoxy-1,1,1,2,3,4,4,5,5,6,6,6-dodecafluoro-2-(trifluoromethyl) hexane (HFE7500)

 1,1,1,2,3,3,3-heptaflurorpropane (HFC 227ea)

 Methyl formate (HCOOCH3)

 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-tribluoromethyl-pentane (HFE-7300)

 Dimethyl Carbonate

 Propylene Carbonate

Two special provisions/limitations for unique negligibly reactive compounds, which 

include Tertiary Butyl Acetate, have been added to the definition of Exempt Compounds.

Four additional definitions have also been added to the rule. The new definitions include:

 Affected Pollutants

 Ambient Air Quality Standards

 Kern County Air Pollution Control District

 Volatile Organic Compounds

To maintain consistency with EPA, ARB, and other air districts, KCAPCD’s ‘Standard 

Conditions’ have been updated as follows:

a. Gas test temperature has been changed from 60 degrees Fahrenheit to 68 degrees 

Fahrenheit; and

b. Gas test pressure has been changed from 29.92 inches of mercury to 14.7 pounds 

per square inch (760-millimeters of mercury).

Kern County APCD does not anticipate any emissions changes or any significant 

impacts to regulated sources or the APCD resulting from the amendments to Rule 102.

EPA Evaluation

Amended Rule 102 poses no significant cost to industry and no significant 

environmental impact.

EPA is recommending approval of Kern County APCD Rule 102 under section 

110(k) as meeting the requirements of section 110(a) and Part D of the Clean Air Act, as 

amended in 1990. 
Attachments

1. Submitted Rule 102, Definitions (adopted March 11, 2010).

2. SIP Approved Rule 102 (adopted July 1, 1999).

3. Strikeout/underline version of Rule 102.