Basin Name County NameAir Monitoring Site Name Parameter 2000 2001 2002 Great Basin Valleys Inyo Death Valley Natl Monument 4th High 0.079 0.081 0.083 Valid Days 351 344 351 Mono Mammoth Lakes-Gateway HC 4th High 0.0830.074 Valid Days 185 128 Lake County Lake Lakeport-Lakeport Blvd 4th High 0.061 0.060.072 Valid Days 365 363 358 Lake Tahoe El Dorado Echo Summit 4th High 0.0740.0760.077 Valid Days 252 325 350 South Lake Tahoe-Sandy Way 4th High 0.066 0.0670.067 Valid Days 361 359 356 Mojave Desert Kern Mojave-923 Poole Street 4th High 0.0930.099 0.095 Valid Days 332 348 349 Los AngelesLancaster-43301 Division Street 4th High 0.040.102 Valid Days 61 360 Lancaster-W Pondera Street 4th High 0.076 0.099 0.1 Valid Days 357 326 283 San BernardinoBarstow 4th High 0.086 0.085 0.092 Valid Days 360 349 356 Hesperia-Olive Street 4th High 0.109 0.0970.113 Valid Days 360 350 362 Joshua Tree-National Monument 4th High 0.096 0.080.107 Valid Days 344 350 332 Phelan-Beekley Road & Phelan Road 4th High 0.0930.101 0.115 Valid Days 353 359 359 Trona-Athol and Telegraph 4th High 0.079 0.0730.089 Valid Days 357 349 349 Twentynine Palms-Adobe Road #2 4th High 0.089 0.089 0.087 Valid Days 348 349 348 Victorville-14306 Park Avenue 4th High 0.095 0.092 0.106 Valid Days 339 344 354 Mountain Counties Amador Jackson-Clinton Road 4th High 0.0940.0830.089 Valid Days 363 360 353 Calaveras San Andreas-Gold Strike Road 4th High 0.098 0.0870.093 Valid Days 326 362 362 El Dorado Cool-Highway 193 4th High 0.1030.105 0.111 Valid Days 182 175 183 Placerville-Gold Nugget Way 4th High 0.092 0.0930.098 Valid Days 361 330 250 Mariposa Jerseydale - 6440 Jerseydale 4th High 0.09 0.088 0.091 Valid Days 182 167 184 Yosemite National Park-Merced River 4th High 0.072 Valid Days 118 Yosemite Natl Park-Turtleback Dome 4th High 0.0870.0870.093 Valid Days 354 326 334 Nevada Grass Valley-Litton Building 4th High 0.1 0.095 0.099 Valid Days 338 351 364 Truckee-Fire Station 4th High 0.0630.075 0.065 Valid Days 311 363 289 White Cloud Mountain 4th High 0.0940.0930.093 Valid Days 243 282 183 Placer Colfax-City Hall 4th High 0.055 0.068 0.101 Valid Days 101 78 295 Plumas Quincy-N Church Street 4th High 0.069 0.068 0.078 Valid Days 363 240 323 Tuolumne Five Mile Learning Center 4th High 0.095 0.085 0.094 Valid Days 291 184 182 Sonora-Barretta Street 4th High 0.085 0.079 0.09 Valid Days 352 347 361 Year 

### Enclosure 2 2000-2002 8-hour Ozone Data* for California Air Monitoring Sites

Page 1 July 15, 2003Basin Name County NameAir Monitoring Site Name Parameter 2000 2001 2002 Year North Central Coast Monterey Carmel Valley-Ford Road 4th High 0.0630.0630.066 Valid Days 358 357 359 King City-750 Metz Road 4th High 0.066 0.058 0.063 Valid Days 359 363 350 Monterey-Silver Cloud Court 4th High 0.060.0570.056 Valid Days 356 365 364 Salinas-High School 4th High 0.055 0.061 0.056 Valid Days 359 357 363 San Benito Hollister-Fairview Road 4th High 0.072 0.072 0.076 Valid Days 337 347 358 Pinnacles National Monument 4th High 0.078 0.079 0.086 Valid Days 278 360 361 Santa Cruz Davenport 4th High 0.05 0.053 0.05 Valid Days 360 347 354 Santa Cruz-2544 Soquel Avenue 4th High 0.0570.0560.054 Valid Days 345 332 352 Scotts Valley-Scotts Valley Drive 4th High 0.0640.0640.065 Valid Days 353 343 360 Watsonville-Airport Boulevard 4th High 0.057 0.060.055 Valid Days 363 363 363 North Coast Mendocino Ukiah-E Gobbi Street 4th High 0.0530.052 0.06 Valid Days 358 359 360 Willits-899 S Main Street 4th High 0.0430.045 0.052 Valid Days 361 359 360 Sonoma Healdsburg-Municipal Airport 4th High 0.061 0.065 0.065 Valid Days 366 332 365 Northeast Plateau Siskiyou Yreka-Foothill Drive 4th High 0.062 0.0370.066 Valid Days 267 249 343 Sacramento Valley Butte Chico-Manzanita Avenue 4th High 0.078 0.080.081 Valid Days 352 360 358 Paradise-4405 Airport Road 4th High 0.086 0.088 0.094 Valid Days 175 360 362 Colusa Colusa-Sunrise Blvd 4th High 0.071 0.0830.076 Valid Days 348 357 355 Glenn Willows-E Laurel Street 4th High 0.0740.0760.072 Valid Days 354 345 357 Placer Auburn-Dewitt-C Avenue 4th High 0.1 0.102 0.101 Valid Days 268 254 109 Rocklin-Rocklin Road 4th High 0.089 0.091 0.097 Valid Days 346 359 273 Roseville-N Sunrise Blvd 4th High 0.092 0.09 0.095 Valid Days 326 360 361 SacramentoElk Grove-Bruceville Road 4th High 0.0740.0840.069 Valid Days 347 347 329 Folsom-Natoma Street 4th High 0.1 0.0960.104 Valid Days 273 335 347 North Highlands-Blackfoot Way 4th High 0.089 0.0930.095 Valid Days 349 353 330 Sacramento-3801 Airport Road 4th High 0.078 0.079 0.079 Valid Days 352 332 318 Sacramento-Del Paso Manor 4th High 0.0930.089 0.105 Valid Days 342 308 336 Sacramento-T Street 4th High 0.075 0.080.083 Valid Days 356 346 346 Sloughhouse 4th High 0.098 0.092 0.097 Valid Days 209 202 204 Shasta Anderson-North Street 4th High 0.0740.0770.072 Valid Days 355 323 360 Lassen Volcanic Natl Park-Manzanita Lake 4th High 0.0740.0730.075 Valid Days 349 319 317 Redding-Health Dept Roof 4th High 0.082 0.072 0.081 Valid Days 331 290 357 Solano Vacaville-Elmira Road 4th High 0.0730.071 0.073 Valid Days 360 343 355

Page 2 July 15, 2003Basin Name County NameAir Monitoring Site Name Parameter 2000 2001 2002 Year Sutter Pleasant Grove-4 miles SW 4th High 0.0830.084 0.08 Valid Days 358 361 302 Sutter Buttes-S Butte 4th High 0.082 0.0730.099 Valid Days 152 163 180 Yuba City-Almond Street 4th High 0.079 0.081 0.08 Valid Days 314 318 358 Tehama Red Bluff-Oak Street 4th High 0.079 0.078 0.088 Valid Days 363 299 365 Tuscan Butte 4th High 0.082 0.078 0.091 Valid Days 156 180 184 Yolo Davis-UCD Campus 4th High 0.08 0.075 0.076 Valid Days 353 322 325 Woodland-Gibson Road 4th High 0.081 0.081 0.088 Valid Days 352 355 362 Salton Sea Imperial Calexico-East 4th High 0.075 0.092 0.087 Valid Days 304 285 315 Calexico-Ethel Street 4th High 0.088 0.1 0.073 Valid Days 325 360 364 Calexico-Grant Street 4th High 0.089 0.092 Valid Days 184 360 El Centro-9th Street 4th High 0.0830.089 Valid Days 184 358 Niland-English Road 4th High 0.079 0.089 Valid Days 362 359 Westmorland-W 1st Street 4th High 0.068 0.073 Valid Days 184 358 Riverside Indio-Jackson Street 4th High 0.0870.0930.097 Valid Days 360 365 365 Palm Springs-Fire Station 4th High 0.096 0.111 0.109 Valid Days 362 365 362 San Diego San Diego Alpine-Victoria Drive 4th High 0.095 0.0960.096 Valid Days 322 364 352 Camp Pendleton 4th High 0.075 0.076 0.07 Valid Days 336 359 357 Chula Vista 4th High 0.072 0.071 0.07 Valid Days 357 358 363 Del Mar-Mira Costa College 4th High 0.070.072 0.071 Valid Days 362 333 355 El Cajon-Redwood Avenue 4th High 0.0770.0740.073 Valid Days 344 360 358 Escondido-E Valley Parkway 4th High 0.081 0.0760.069 Valid Days 354 364 363 Oceanside-Mission Avenue 4th High 0.069 0.071 Valid Days 350 364 Otay Mesa-Paseo International 4th High 0.056 0.060.069 Valid Days 359 357 360 San Diego-12th Avenue 4th High 0.0640.065 0.064 Valid Days 360 358 363 San Diego-Logan Avenue 4th High 0.063 0.04 Valid Days 329 59 San Diego-Overland Avenue 4th High 0.0730.0830.076 Valid Days 359 358 351 San Francisco Bay AreaAlameda Fremont-Chapel Way 4th High 0.0530.0660.063 Valid Days 363 360 341 Hayward-La Mesa 4th High 0.061 0.060.064 Valid Days 242 244 244 Livermore-793 Rincon Avenue 4th High 0.076 0.081 0.088 Valid Days 358 357 360 Livermore-Old 1st Street 4th High 0.074 Valid Days 331 Oakland-6701 International Boulevard 4th High 0.031 0.05 Valid Days 35 337 Oakland-Alice Street 4th High 0.041 0.041 0.038 Valid Days 240 244 242 San Leandro-County Hospital 4th High 0.0530.055 0.054 Valid Days 239 243 239 Page 3 July 15, 2003Basin Name County NameAir Monitoring Site Name Parameter 2000 2001 2002 Year Contra CostaBethel Island Road 4th High 0.077 0.080.077 Valid Days 352 356 350 Concord-2975 Treat Blvd 4th High 0.071 0.081 0.083 Valid Days 355 356 352 Crockett-1098 Pomona Street 4th High 0.0360.064 Valid Days 78 344 Pittsburg-10th Street 4th High 0.071 0.0740.077 Valid Days 359 357 358 San Pablo-El Portal 4th High 0.05 0.052 0.05 Valid Days 361 354 221 San Pablo-Rumrill Blvd 4th High 0.045 Valid Days 101 Marin San Rafael 4th High 0.045 0.05 0.046 Valid Days 357 354 361 Napa Napa-Jefferson Avenue 4th High 0.061 0.060.068 Valid Days 361 354 342 San FranciscoSan Francisco-Arkansas Street 4th High 0.041 0.0470.045 Valid Days 359 350 353 San Mateo Redwood City 4th High 0.048 0.0530.057 Valid Days 357 348 336 Santa ClaraGilroy-9th Street 4th High 0.0740.082 Valid Days 244 242 Los Gatos 4th High 0.0570.072 0.078 Valid Days 238 268 304 San Jose-4th Street 4th High 0.046 0.065 0.045 Valid Days 355 349 117 San Jose-935 Piedmont Road 4th High 0.05 0.055 0.057 Valid Days 240 242 242 San Martin-Murphy Avenue 4th High 0.0730.079 0.094 Valid Days 235 244 239 Sunnyvale-910 Ticonderoga 4th High 0.0460.064 Valid Days 234 244 Solano Fairfield-Bay Area AQMD 4th High 0.0670.068 0.052 Valid Days 236 243 58 Suisun STP 4th High 0.074 Valid Days 183 Vallejo-304 Tuolumne Street 4th High 0.051 0.0630.062 Valid Days 354 356 358 Sonoma Santa Rosa-5th Street 4th High 0.05 0.0530.054 Valid Days 355 346 352 San Joaquin Valley Fresno Clovis-N Villa Avenue 4th High 0.104 0.11 0.104 Valid Days 357 359 351 Fresno-1st Street 4th High 0.1040.1040.109 Valid Days 358 357 357 Fresno-Drummond Street 4th High 0.099 0.097 0.11 Valid Days 338 356 363 Fresno-Sierra Skypark #2 4th High 0.1140.1130.119 Valid Days 351 358 362 Parlier 4th High 0.108 0.109 0.115 Valid Days 362 349 362 Shaver Lake - Perimeter Road 4th High 0.091 0.0930.096 Valid Days 184 169 184 Kern Arvin-Bear Mountain Blvd 4th High 0.111 0.109 0.118 Valid Days 351 358 364 Bakersfield-5558 California Avenue 4th High 0.102 0.099 0.101 Valid Days 348 358 361 Bakersfield-Golden State Highway 4th High 0.099 0.095 0.101 Valid Days 327 348 344 Edison 4th High 0.105 0.1040.109 Valid Days 349 364 358 Maricopa-Stanislaus Street 4th High 0.095 0.098 0.106 Valid Days 305 361 359 Oildale-3311 Manor Street 4th High 0.1030.0970.102 Valid Days 357 355 342 Shafter-Walker Street 4th High 0.092 0.098 0.096 Valid Days 358 343 346 Page 4 July 15, 2003Basin Name County NameAir Monitoring Site Name Parameter 2000 2001 2002 Year Kings Hanford-S Irwin Street 4th High 0.105 0.0930.101 Valid Days 359 358 356 Madera Madera-Pump Yard 4th High 0.088 0.09 0.096 Valid Days 358 348 357 Merced Merced-S Coffee Avenue 4th High 0.1030.0960.105 Valid Days 357 351 361 San JoaquinStockton-E Mariposa 4th High 0.079 0.0830.081 Valid Days 303 169 153 Stockton-Hazelton Street 4th High 0.076 0.0760.074 Valid Days 353 363 363 Tracy-24371 Patterson Pass Road 4th High 0.082 0.078 0.084 Valid Days 364 361 356 Stanislaus Modesto-14th Street 4th High 0.086 0.091 0.087 Valid Days 360 361 355 Turlock-S Minaret Street 4th High 0.091 0.0940.102 Valid Days 365 330 355 Tulare Sequoia & Kings Canyon Np 4th High 0.105 0.1040.107 Valid Days 93 264 309 Sequoia National Park-Lookout Point 4th High 0.101 0.101 0.109 Valid Days 236 207 295 Sequoia Natl Park-Lower Kaweah 4th High 0.09 0.0960.108 Valid Days 324 360 333 Visalia-N Church Street 4th High 0.099 0.099 0.102 Valid Days 360 363 362 South Central Coast San Luis ObispoAtascadero-Lewis Avenue 4th High 0.070.0730.078 Valid Days 357 357 349 Grover City-Lesage Drive 4th High 0.055 0.058 0.05 Valid Days 338 321 350 Morro Bay 4th High 0.052 0.0570.056 Valid Days 347 351 354 Nipomo-Regional Park 4th High 0.058 0.0730.062 Valid Days 345 332 353 Paso Robles-Santa Fe Avenue 4th High 0.069 0.071 0.074 Valid Days 274 363 350 San Luis Obispo-Marsh Street 4th High 0.0530.061 0.059 Valid Days 273 363 330 Santa BarbaraCarpinteria-Gobernador Road 4th High 0.075 0.069 0.063 Valid Days 364 345 346 El Capitan Beach 4th High 0.065 0.070.061 Valid Days 361 357 364 Gaviota-GTC Site B 4th High 0.0670.0630.065 Valid Days 364 362 364 Goleta-Fairview 4th High 0.065 0.0630.056 Valid Days 361 362 359 Las Flores Canyon #1 4th High 0.0770.076 0.07 Valid Days 363 359 361 Lompoc-HS&P 4th High 0.0670.069 0.068 Valid Days 363 362 362 Lompoc-S H Street 4th High 0.059 0.0570.063 Valid Days 362 363 362 Paradise Road-Los Padres National Forest 4th High 0.08 0.0830.085 Valid Days 364 363 362 Santa Barbara-700 East Canon Perdido 4th High 0.055 Valid Days 232 Santa Barbara-W Carillo Street 4th High 0.061 Valid Days 286 Santa Maria-906 S Broadway 4th High 0.0530.051 0.048 Valid Days 303 348 363 Santa Maria-Broadway 4th High 0.044 Valid Days 59 Santa Rosa Island 4th High 0.065 0.0640.066 Valid Days 298 346 334 Santa Ynez-Airport Road 4th High 0.066 0.0670.067 Valid Days 363 365 361 Vandenberg Air Force Base-STS Power 4th High 0.061 0.0630.063 Valid Days 364 359 355 Page 5 July 15, 2003Basin Name County NameAir Monitoring Site Name Parameter 2000 2001 2002 Year Ventura El Rio-Rio Mesa School #2 4th High 0.0670.0670.064 Valid Days 357 359 354 Ojai-Ojai Avenue 4th High 0.092 0.0960.097 Valid Days 357 359 358 Piru-2 miles SW 4th High 0.078 Valid Days 300 Piru-3301 Pacific Avenue 4th High 0.041 0.092 0.087 Valid Days 58 356 363 Simi Valley-Cochran Street 4th High 0.1 0.101 0.092 Valid Days 355 360 350 Thousand Oaks-Moorpark Road 4th High 0.082 0.083 0.08 Valid Days 364 359 362 Ventura County-W Casitas Pass Road 4th High 0.0770.085 0.076 Valid Days 328 340 292 Ventura-Emma Wood State Beach 4th High 0.068 0.0760.064 Valid Days 351 354 358 South Coast Los AngelesAzusa 4th High 0.108 0.102 0.097 Valid Days 366 365 358 Burbank-W Palm Avenue 4th High 0.0970.0870.091 Valid Days 366 358 363 Glendora-Laurel 4th High 0.112 0.11 0.111 Valid Days 364 364 356 Hawthorne 4th High 0.065 0.075 0.064 Valid Days 359 365 329 Los Angeles-651 Mott Street 4th High 0.075 0.065 Valid Days 301 146 Los Angeles-North Main Street 4th High 0.085 0.075 0.077 Valid Days 365 361 360 Lynwood 4th High 0.05 0.0540.049 Valid Days 365 365 354 North Long Beach 4th High 0.066 0.060.059 Valid Days 362 364 354 Pasadena-S Wilson Avenue 4th High 0.104 0.09 0.095 Valid Days 361 365 364 Pico Rivera 4th High 0.086 0.081 0.074 Valid Days 365 364 356 Pomona 4th High 0.088 0.081 0.099 Valid Days 365 365 357 Reseda 4th High 0.08 0.09 0.111 Valid Days 366 365 361 Santa Clarita 4th High 0.112 0.131 Valid Days 226 359 Santa Clarita-County Fire Station 4th High 0.0970.063 Valid Days 363 121 West Los Angeles-VA Hospital 4th High 0.071 0.0640.073 Valid Days 366 365 356 Wilmington-1115 N.Mahar Avenue 4th High 0.058 0.058 Valid Days 198 209 Orange Anaheim-Harbor Blvd 4th High 0.0740.0660.069 Valid Days 360 274 346 Costa Mesa-Mesa Verde Drive 4th High 0.0670.069 0.066 Valid Days 363 365 360 El Toro 4th High 0.067 Valid Days 244 La Habra 4th High 0.0830.0730.071 Valid Days 361 365 361 Mission Viejo-26081 Via Pera 4th High 0.0770.0830.081 Valid Days 122 365 362 Riverside Banning Airport 4th High 0.102 0.1160.113 Valid Days 364 365 328 Lake Elsinore-W Flint Street 4th High 0.098 0.111 0.104 Valid Days 364 348 358 Perris 4th High 0.111 0.122 0.107 Valid Days 365 365 356 Riverside-Rubidoux 4th High 0.106 0.109 0.109 Valid Days 365 364 335 Page 6 July 15, 2003Basin Name County NameAir Monitoring Site Name Parameter 2000 2001 2002 Year San BernardinoCrestline 4th High 0.122 0.1330.131 Valid Days 352 365 362 Fontana-Arrow Highway 4th High 0.1 0.122 0.114 Valid Days 363 365 326 Redlands-Dearborn 4th High 0.112 0.131 0.117 Valid Days 366 365 363 San Bernardino-4th Street 4th High 0.111 0.128 0.105 Valid Days 365 359 348 Upland 4th High 0.117 0.12 0.105 Valid Days 366 364 360 * - Ozone units are ppm ** - Values for Antelope Valley are based on 1999-2001, due to unavailability of 2002 data 4th High = 4th highest daily maximum 8-hour average ozone concentration Valid Days = Number of valid 8-hour ozone days per indicated year (based on federal definition) 3-year Average of 4th High = 3-year average of the 4th highest daily maximum 8-hour ozone concentration during 2000-2002 Data Extracted from ARB ADAM Database on July 9, 2003

Page 7 July 15, 20030.081

0.078 0.064 0.075 0.066 0.095 0.071 0.091** 0.087 0.106 0.094 0.103 0.080 0.088 0.097 0.088 0.092 0.106 0.094 0.089 0.072 0.089 0.098 0.067 0.093 0.074 0.071 0.091 0.084 3-year Average of 4th Highest 

### Enclosure 2 2000-2002 8-hour Ozone Data* for California Air Monitoring Sites

Page 8 July 15, 20033-year Average of 4th Highest

0.064 0.062 0.057 0.057 0.073 0.081 0.051 0.055 0.064 0.057 0.055 0.046 0.063 0.056 0.079 0.089 0.076 0.074 0.101 0.092 0.092 0.075 0.100 0.092 0.078 0.095 0.079 0.095 0.074 0.074 0.078 0.072

Page 9 July 15, 20033-year Average of 4th Highest

0.082 0.084 0.080 0.081 0.083 0.077 0.083 0.084 0.087 0.090 0.086 0.084 0.070 0.092 0.105 0.095 0.073 0.071 0.071 0.074 0.075

0.061 0.064

0.077 0.060 0.061 0.081

0.040 0.040 0.054

Page 10 July 15, 20033-year Average of 4th Highest

0.078 0.078 0.050 0.074 0.050 0.045 0.047 0.063 0.044 0.052 0.078 0.069 0.052 0.054 0.082 0.055 0.062 0.074 0.058 0.052 0.106 0.105 0.102 0.115 0.110 0.093 0.112 0.100 0.098 0.106 0.099 0.100 0.095

Page 11 July 15, 20033-year Average of 4th Highest

0.099 0.091 0.101 0.081 0.075 0.081 0.088 0.095 0.105 0.103 0.098 0.100 0.073 0.054 0.055 0.064 0.071 0.057 0.069 0.065 0.065 0.061 0.074 0.068 0.059 0.082 0.055

0.050

0.065 0.066 0.062

Page 12 July 15, 20033-year Average of 4th Highest

0.066 0.095

0.073 0.097 0.081 0.079 0.069 0.102 0.091 0.111 0.068 0.070 0.079 0.051 0.061 0.096 0.080 0.089 0.093 0.121

0.069 0.058 0.069 0.067

0.075 0.080 0.110 0.104 0.113 0.108

Page 13 July 15, 20033-year Average of 4th Highest

0.128 0.112 0.120 0.114 0.114

Page 14 July 15, 2003