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 2010AGENCY: 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 F ebruary

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 compo unds with a negligible level of reactivity do not need to be regulated to reduce ozone. The EPA lists negligibl y 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 - he xafluoropropane (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 - difluoromethox ym ethyl) - 1,1,1,2,3,3,3 - heptabluoropropane (CF3)2CFCF2OCH3)  1 - ethox y- 1,1,2,2,3,3,4,4,4 - nonafluorobutane (C4F9OC2H5 or HFE - 7200)  2 - (ethox ydifluoromethyl ) - 1,1,1,2,3,3,3 - heptabluoropropane ((CF3)2CFCF2OC2H5)  Methyl Acetate  1,1,1,2,2,3,3 - heptaf

luoro - 3 - methoxy- propane (n - C3F7OCH3 or HFE - 7000)  3 - ethox y- 1,1,1,2,3,4,4,5,5,6,6,6 - dodecafluoro - 2 - (trifluoromethyl) hexane (HFE 7500)  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 - p entane (HFE - 7300)  Dimethyl Carbonate  Propylene Carbonate Two special provisions/limitations for unique negligibly reactive compounds, which include Tertiary

ButylAcetate, 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, KCAPC D’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 - mill imeters 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. Strikeo ut/underline version of Rule 102 .