point of intersection with the northwest corner of the Lassen Volcanic National Park boundary; then east along the north boundary of Lassen Volcanic National Park to the point of intersection with the Lassen-Shasta County boundary.

Siskiyou County-that portion of Siskiyou County which lies east of a line described as follows:

Beginning at the Oregon border and running south along the eastern boundary of T. 48 N., R. 8 W., Humboldt Base and Meridlan; to the northeast corner of T. 47 N., R. 8 W.; then east along the north boundary of T. 47 N., R. 7 W. to the northeast corner of sec. 4, T. 47 N., R. 7 W.; then south along the east boundaries of secs. 4, 9, 16, 21, 28, and 33, T. 47 N., R. 7 W., then west along the south boundary of T. 47 N., R. 7 W. to the northeast corner of T. 46 N., R. 8 W.; then south along the east boundary of T. 46 N., R. 8 W. to its intersection with the north boundary of T. 45 N., R. 8 W.; then east onequarter mile to the northeast corner of T. 45 N., R. 8 W.; then south along the east boundary of T. 45 N., R. 8 W., and T. 44 N., R. 8 W. to the northeast corner of sec. 24, T. 44 N., R. 8 W.; then east along the section line to the northeast corner of sec. 20, T. 44 N., R. 7 W.; then south along the eastern boundaries of secs. 20, 29, and 32, T. 44 N., R. 7 W. to the north boundary of T. 43 N., R. 7 W.; then east along the north boundary of T. 43 N., R. 7 W.; to the northeast corner of sec. 3, T. 43 N.. R. 7 W.; then south along the east boundaries of secs. 3 10, 15, 22, 27, and 34, T. 43 N., R. 7 W. and continuing south along the east boundaries of secs. 3, 10, 15, 22, 27, and 34, T. 42 N., R. 7 W.; then east to the intersection of the Klamath and Shasta National Forest boundaries; then south along the common boundary of the two National Forests to the Trinity County boundary.

Shasta County-that portion of Shasta County which lies west and south of a line described as follows:

Beginning at the Shasta-Siskiyou County boundary and running south along the range line common to R. 2 E. and R. 1 E., Mount Diablo Base and Meridian to the southwestcorner of T. 35 N., R. 2 E.; then east along the township line common to T. 35 N. and T. 34 N. to the northwest corner of T. 34 N., R. 3 E.; then south along the range line common to R. 3 E. and R. 2 E. to the southwest corner of T. 33 N., R. 3 E.; then east along the township line common to T. 33 N. and T. 32 N. to the northwest corner of T. 32 N., R. 4 E.; then south along the range line common to R. 4 E. and R. 3 E. to the point of intersection with the northwest corner of the Lassen Volcanic National Park boundary; then east along the north boundary of Lassen Volcanic National Park to the point of intersection with the Lassen-Shasta County boundary.

§ 81.164

San Diego Intrastate Air Quality Control Region.

The San Diego Intrastate Air Quality Control Region (California) consists of the territorial area encompassed by the boundaries of the following jurisdictions or described area (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:

San Diego County-that portion of San Diego County which lies west of a line described as follows:

Beginning at the United States-Mexico border and running north along the range line common to R. 7 E., and R. 6 E., San Bernardino Base and Meridian; to the southeast corner of T. 16 S., R. 6 E.; then west along the township line common to T. 16 S. and T 17 S. to the southwest corner of T. 16 S., R. 6 E.; then north along the range line common to R. 6 E. and R. 5 E. to the southeast corner of T. 14 S., R. 5 E.; then west along the township line common to T. 14 S. and T. 15 S. to the point of intersection with the east boundary of Cuyamaca Park; then north along the east boundary of Cuyamaca Park to the point of intersection with the range line common to R. 5 E. and R. 4 E.; then north along this range line to the point of intersection with the south boundary of the San Felipe Land Grant; then east and north along the land grant boundary to the easternmost corner; then continuing west and north along the land grant boundary to the point of intersection with the range line common to R. 5 E. and R. 4 E.; then north along this range line to the point of intersection with the township line common to T. 10 S. and T. 9 S.; then west along this township line to the point

of intersection with the range line common to R. 4 E. and R. 3 E.; then north along this range line to the San Diego-Riverside County boundary.

§ 81.165 San Joaquin Valley Intrastate Air Quality Control Region.

The San Joaquin Valley Intrastate Air Quality Control Region (California) consists of the territorial area encompassed by the boundaries of the following jurisdictions or described area (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:

Amador County.
Calaveras County.
Fresno County.
Kings County.

Madera County.

Mariposa County.

Merced County. San Joanquin County. Stanislaus County. Tulare County. Tuolumne County.

Kern County-that portion of Kern County which lies west and north of a line described as follows:

Beginning at the Kern-Los Angeles County boundary and running north and east along the northwest boundary of the Rancho La Liebre Land Grant to the point of intersection with the range line common to R. 15 W. and R. 16 W., San Bernardino Base and Meridian; north along the range line; then east along the township line common to T. 32 S., Mount Diablo Base and Meridian; and T. 12 N., San Bernardino Base and Meridian; then north along the range line common to R. 34 E. and R. 33 E., Mount Diablo Base and Meridian; then east along the township line common to T. 32 S. and T. 31 S.; then north along the range line common to R. 35 E. and R. 34 E.; then east along the township line common to T. 29 S. and. T. 28 S.; then north along the range line common to R. 36 E. and R. 35 E.; then east along the township line common to T. 28 S. and T. 27 S.; then north along the range line common to R. 37 E., and R. 36 E. to the Kern-Tulare County boundary. § 81.166 South_Central Coast Intrastate Air Quality Control Region.

The South Central Coast Intrastate Air Quality Control Region (California) consists of the territorial area encompassed by the boundaries of the following jurisdictions or described area (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:
San Luis Obispo County.

Santa Barbara County-that portion of Santa Barbara County which lies north of a line described as follows:

Beginning at the Pacific Ocean outfall of Jalama Creek and running east and north along Jalama Creek to a point of intersection with the west boundary of the San Julian Land Grant; then south along the San Julian Land Grant boundary to its southwest corner; then east along the south boundary of the San Julian Land Grant to the northeast corner of partial sec. 20, T. 5 N., R. 32 W., San Bernardino Base and Meridian; then south and east along the boundary of the Las Cruces Land Grant to the southwest corner of partial sec. 22, T. 5 N., R. 32 W.; then northeast along the Las Cruces Land Grant boundary; then east along the north boundaries of sec. 13, T. 5 N., R. 32 W., and secs. 18, 17, 16, 15, 14, 13, T. 5 N., R. 31 W., and secs. 18, 17, 16, 15, 14, 13, T. 5 N., R. 30 W., and secs. 18, 17, 16, 15, T. 5 N., R. 29 W.; then south along the east boundary of sec. 15 T. 5 N., R. 29 W.; then east along the north boundaries of secs. 23 and 24, T. 5 N., R. 29 W., and secs. 19, 20, 21, 22, 23, 24, T. 5 N., R. 28 W., and secs. 19 and 20, T. 5 N., R. 27 W.; then south along the east boundary of sec. 20, T. 5 N., R. 27 W.; then east along the north boundaries of secs. 28, 27, 26, 25, T. 5 N., R. 27 W. and sec. 30, T. 5 N., R. 26 W.; then south along the east boundary of sec. 30, T. 5 N., R. 26 W.; then east along the north boundaries of secs. 32, 33, 34, 35, T. 5 N., R. 26 W.; then south along the east boundary of sec. 35, T. 5 N., R. 26 W. to the township line common to T. 4 N. and T. 5 N.; then east along this township line to the Santa Barbara-Ventura County boundary.

§ 81.167 Southeast Desert Intrastate Air Quality Control Region.

The Southeast Desert Intrastate Air Quality Control Region (California) consists of the territorial area encompassed by the boundaries of the following jurisdictions or described area (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:
Imperial County.

San Diego County-that portion of San Diego County which lies east of a line described as follows:

Beginning at the United States-Mexico border and running north along the range line common to R. 7 E. and R. 6 E. to the southeast corner of T. 16 S., R. 6 E.; then west along the township line, San Bernardino Base and Meridian; common to T. 16 S. and T. 17 S. to the southwest corner of T. 16 S., R. 6 E.; then north along the range line common to R, 6 E, and R,

5 E. to the southeast corner of T. 14 S., R. 5 E.; then west along the township line common to T. 14 S. and T. 15 S. to the point of intersection with the east boundary of Cuyamaca Park; then north along the east boundary of Cuyamaca Park to the point of intersection with the range line common to R. 5 E. and R. 4 E.; then north along this range line to the point of intersection with the south boundary of the San Felipe Land Grant; then east and north along the land grant boundary to the eastern most corner; then continuing west and north along the land grant boundary to the point of intersection with the range line common to R. 5 E. and R. 4 E.; then north along this range line to the point of intersection with the township line common to T. 10 S. and T. 9 S.; then west along this township line to the point of intersection with the range line common to R. 4 E. and R. 3 E.; then north along this range line to the San Diego-Riverside County boundary.

Riverside County-that portion of Riverside County which lies east of a line described as follows:

Beginning at the Riverside-San Diego County boundary and running north along the range line common to R. 4 E. and R. 3 E., San Bernardino Base and Meridian; then east along the township line common to T. 8 S. and T. 7 S.; then north along the range line common to R. 5 E. and R. 4 E.; then west along the township line common to T. 6 S. and T. 7 S. to the southwest corner of sec. 34, T. 6 S., R. 4 E.; then north along the west boundaries of secs. 34, 27, 22, 15, 10, 3, T. 6 S., R. 4 E.; then west along the township line common to T. 5 S. and T. 6 S.; then north along the range line common to R. 4 E. and R. 3 E.; then west along the south boundaries of secs. 13, 14, 15, 16, 17, and 18, T. 5 S., R. 3 E.; then north along the range line common to R. 2 E. and R. 3 E.; then west along the township line common to T. 4 S. and T. 3 S. to the intersection with the southwest boundary of partial sec. 31, T. 3 S., R. 1 W.; then northwest along the line to the intersection with the range line common to R. 2 W. and R. 1 W.; then north to the Riverside-San Bernardino County line.

San Bernardino County-that portion of San Bernardino County which lies east and north of a line described as follows:

Beginning at the San Bernardino-Riverside County boundary and running north along the range line common to R. 3 E. and R. 2 E., San Bernardino Base and Meridian; then west along the township line common to T. 3 N. and T. 2 N. to the San BernardinoLos Angeles County boundary.

Los Angeles County-that portion of Los Angeles County which lies north and east of a line described as follows:

Beginning at the Los Angeles-San Bernardino County boundary and running west along the township line common to T. 3 N. and T. 2 N., San Bernardino Base and Meridian; then north along the range line common to R. 8 W. and R. 9 W.; then

west along the township line common to T. 4 N. and T. 3 N.; then north along the range line common to R. 12 W. and R. 13 W. to the southeast corner of sec. 12, T. 5 N., R. 13 W.; then west along the south boundaries of secs. 12, 11, 10, 9, 8, 7, T. 5 N., R. 13 W. to the boundary of the Angeles National Forest which is collinear with the range line common to R. 13 W. and R. 14 W.; then north and west along the Angeles National Forest boundary to the point of intersection with the township line common to T. 7 N. and T. 6 N. (point is at the northwest corner of sec. 4 in T. 6 N., R. 14 W.); then west along the township line common to T. 7 N. and T. 6 N.; then north along the range line common to R. 15 W. and R. 16 W. to the southeast corner of sec. 13, T. 7 N., R. 16 W.; then along the south boundaries cí secs. 13, 14, 15, 16, 17, 18, T. 7 N., R. 16 W.; then north along the range line common to R. 16 W. and R. 17 W. to the north boundary of the Angeles National Forest (collinear with township line common to T. 8 N. and T. 7 N.) then west and north along the Angeles National Forest boundary to the point of intersection with the south boundary of the Rancho La Liebre Land Grant; then west and north along this land grant boundary to the Los Angeles-Kern County boundary.

Kern County-that portion of Kern County which lies east and south of a line described as follows:

Beginning at the Kern-Los Angeles County boundary and running north and east along the northwest boundary of the Rancho La Liebre Land Grant to the point of intersection with the range line common to R. 15 W. and R. 16 W., San Bernardino Base and Meridian, north along the range line; then east along the township line common to T. 82 S., Mount Diablo Base and Meridian; and T. 12 N., San Bernardino Base and Meridian; then north along the range line common to R. 34 E. and R. 33 E., Mount Diablo Base and Meridian; then east along the township line common to T. 32 S. and T. 31 S.; then north along the range line common to R. 35 E. and R. 34 E.; then east along the township line common to T. 29 S. and T. 28 S.; then north along the range line common to R. 86 E. and R. 35 E.; then east along the township line common to T. 28 S. and T. 27 S.; then north along the range line common to R. 37 E. and R. 36 E. to the Kern-Tulare County boundary.

§ 81.168 Great Falls Intrastate Air Quality Control Region.

§ 81.173 Grand Mesa Intrastate Air Quality Control Region.

The Grand Mesa Intrastate Air Quality Control Region (Colorado) consists of the territorial area encompassed by the boundaries of the following jurisdictions or described area (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 Colorado:
Delta County.
Eagle County.
Garfield County.
Gunnison County.
Hinsdale County.
Mesa County.

Montrose County.
Ouray County.
Pitkin County.
San Miguel County.
Summit County.

§ 81.174 Pawnee Intrastate Air Quality Control Region.

The Pawnee Intrastate Air Quality Control Region (Colorado) consists of the territorial area encompassed by the boundaries of the following jurisdictions or described area (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

§ 81.181

Down

East Intrastate Air Quality Control Region.

The Down East Intrastate Air Quality Control Region (Maine) consists of the territorial area encompassed by the boundaries of the following jurisdictions or described area (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 Maine: Hancock County.

Washington County. Penobscot County-That portion of Penobscot County which lies south of a line described as follows: Beginning at the point where the Penobscot-Aroostook County boundary is intersected by a line common to the boundaries of Patten and Stacyville Townships and running due west to the Intersection of said line with PenobscotPiscataquis County boundary.