[Code of Federal Regulations]
[Title 40, Volume 15]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR81.21]

[Page 13]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 81--DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES--Table of Contents
 
          Subpart B--Designation of Air Quality Control Regions
 
Sec. 81.21  San Francisco Bay Area Intrastate Air Quality Control Region.

    The San Francisco Bay Area Intrastate Air Quality Control Region 
consists of the territorial area encompassed by the boundaries of the 
following jurisdictions (including the territorial area of all 
municipalities as defined in section 302(f) of the Clean Air Act, 42 
U.S.C. 1857h(f) geographically located within the outermost boundaries 
of the area so delimited):

    In the State of California: Alameda County, Contra Costa County, 
Marin County, Napa County; San Francisco County, San Mateo County, Santa 
Clara County.
    Solano County--that portion of Solano County which lies south and 
west of a line described as follows:Beginning at the intersection of the 
westerly boundary of Solano County and the \1/4\ section line running 
east and west through the center of Section 34, T. 6 N., R. 2 W., M.D.B. 
& M., thence east along said \1/4\ section line to the east boundary of 
Section 36, T. 6 N., R. 2 W., thence south \1/2\ mile and east 2.0 
miles, more or less, along the west and south boundary of Los Putos 
Rancho to the northwest corner of Section 4, T. 5 N., R. 1 W., thence 
east along a line common to T. 5 N. and T. 6 N. to the northeast corner 
of Section 3, T. 5 N., R. 1 E., thence south along section lines to the 
southeast corner of Section 10, T 3 N., R. 1 E., thence east along 
section lines to the south \1/4\ corner of Section 8, T. 3 N., R. 2 E., 
thence east to the boundary between Solano and Sacramento Counties.
    Sonoma County--that portion of Sonoma County which lies south and 
east of a line described as follows:Beginning at the southeasterly 
corner of the Rancho Estero Americano, being on the boundary line 
between Marin and Sonoma Counties, California; thence running northerly 
along the easterly boundary line of said Rancho Estero Americano to the 
northeasterly corner thereof, being an angle corner in the westerly 
boundary line of Rancho Canada de Jonive; thence running along said 
boundary of Rancho Canada de Jonive westerly, northerly and easterly to 
its intersection with the easterly line of Graton Road; thence running 
along the easterly and southerly line of Graton Road, northerly and 
easterly to its intersection with the easterly line of Sullivan Road; 
thence running northerly along said easterly line of Sullivan Road to 
the southerly line of Green Valley Road; thence running easterly along 
the said southerly line of Green Valley Road and easterly along the 
southerly line of State Highway 116, to the westerly line of Vine Hill 
Road; thence running along the westerly and northerly line of Vine Hill 
Road, northerly and easterly to its intersection with the westerly line 
of Laguna Road; thence running northerly along the westerly line of 
Laguna Road and the northerly projection thereof to the northerly line 
of Trenton Road; thence running westerly along the northerly line of 
said Trenton Road to the easterly line of Trenton-Healdsburg Road; 
thence running northerly along said easterly line of Trenton-Healdsburg 
Road to the easterly line of Eastside Road; thence running northerly 
along said easterly line of Eastside Road to its intersection with the 
southerly line of Rancho Sotoyome; thence running easterly along said 
southerly line of Rancho Sotoyome to its intersection with the township 
line common to Townships 8 and 9 North, Mt. Diablo Base and Meridian; 
thence running easterly along said township line to its intersection 
with the boundary line between Sonoma and Napa Counties, State of 
California.

[36 FR 22421, Nov. 25, 1971, as amended at 46 FR 3889, Jan. 16, 1981]