10

100 1000 10000 100000

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1Conc. (ug/L)

Fraction of Sites Benzenein SouthernCalifornia

BenzeneExpectedug/L station number YEAR ID BENZENE_CO

211 1 217 2001 083003124T 80000 2100.995261 74 2001 083000720T 50000 2090.990521 76 2001 083000764T 44000 2080.985782 99 2001 083001073T 43200 2070.981043 116 2001 083001490T 39100 2060.976303 21 2001 083000258T 39000 2050.971564 59 2001 083000575T 38000 2040.966825 115 2001 083001246T 37000 2030.962085 58 2001 083000574T 35000 202 0.957346 61 2001 083000585T 35000 201 0.952607 131 2001 083001704T 32000 2000.947867 237 2001 083003813T 31000 1990.943128 139 2001 083001892T 31000 1980.938389 19 2001 083000253T 30000 1970.933649 132 2001 083001710T 30000 196 0.92891 177 2001 083002439T 29100 1950.924171 45 2001 083000429T 28000 1940.919431 199 2001 083002853T 26800 1930.914692 249 2001 083300823T 24800 192 0.909953 14 2001 083000204T 24000 191 0.905213 84 2001 083000815T 24000 1900.900474 142 2001 083001923T 24000 1890.895735 197 2001 083002800T 23500 1880.890995 167 2001 083002155T 23000 1870.886256 202 2001 083002862T 22000 1860.881517 143 2001 083001931T 22000 1850.876777 101 2001 083001075T 21900 1840.872038 184 2001 083002579T 21500 1830.867299 95 2001 083000980T 21000 182 0.862559 35 2001 083000293T 21000 181 0.85782 119 2001 083001255T 21000 1800.853081 48 2001 083000462T 20000 1790.848341 230 2001 083003311T 20000 1780.843602 24 2001 083000266T 20000 1770.838863 175 2001 083002370T 19300 1760.834123 64 2001 083000637T 18800 1750.829384 183 2001 083002567T 18200 1740.824645 220 2001 083003165T 18000 1730.819905 189 2001 083002664T 18000 172 0.815166 195 2001 083002790T 17800 171 0.810427 135 2001 083001811T 16100 1700.805687 140 2001 083001900T 16000 1690.800948 9 2001 083000051T 16000 1680.796209 155 2001 083002082T 16000 1670.791469 27 2001 083000270T 16000 166 0.78673 68 2001 083000657T 16000 1650.781991 10 2001 083000102T 15600 1640.777251 216 2001 083003104T 153001630.772512 153 2001 083002067T 15000

162 0.767773 170 2001 083002277T 15000 161 0.763033 260 2001 083302499T 14800 1600.758294 299 2001 6B3600840T 14000 1590.753555 18 2001 083000251T 14000 1580.748815 212 2001 083003043T 14000 1570.744076 151 2001 083002045T 14000 1560.739336 291 2001 083601370T 13900 1550.734597 72 2001 083000705T 13000 1540.729858 201 2001 083002860T 12300 1530.725118 253 2001 083301612T 12100 152 0.720379 215 2001 083003094T 12000 151 0.71564 263 2001 083302921T 12000 150 0.7109 211 2001 083003042T 12000 1490.706161 43 2001 083000410T 11300 1480.701422 100 2001 083001074T 11200 1470.696682 103 2001 083001078T 11000 1460.691943 87 2001 083000826T 11000 1450.687204 81 2001 083000804T 11000 1440.682464 4 2001 083000040T 10000.1 1430.677725 114 2001 083001459T 10000 142 0.672986 163 2001 083002237T 10000 141 0.668246 56 2001 083000569T 10000 1400.663507 225 2001 083003225T 9500 1390.658768 108 2001 083001138T 9300 1380.654028 196 2001 083002793T 8900 1370.649289 241 2001 083008888? 8810 136 0.64455 77 2001 083000778T 8600 135 0.63981 12 2001 083000147T 8500 1340.635071 86 2001 083000824T 8160 1330.630332 97 2001 083000997T 8100 132 0.625592 3 2001 083000038T 7700 131 0.620853 274 2001 083303278T 7560 1300.616114 60 2001 083000582T 7500 1290.611374 39 2001 083000369T 7200 1280.606635 63 2001 083000636T 7140 1270.601896 298 2001 083603469T 7100 1260.597156 227 2001 083003262T 7000 1250.592417 75 2001 083000721T 6800 1240.587678 104 2001 083001085T 6610 1230.582938 273 2001 083303275T 6520 122 0.578199 125 2001 083001330T 6500 121 0.57346 235 2001 083003612T 5760 120 0.56872 52 2001 083000487T 5700 1190.563981 44 2001 083000420T 5600 1180.559242 219 2001 083003144T 5600 1170.554502 111 2001 083001219T 5600 1160.549763 182 2001 083002566T 5420 1150.545024 239 2001 083003860T 5400 1140.540284 270 2001 083303188T 5200 1130.535545 54 2001 083000504T 5200 112 0.530806 138 2001 083001867T 4900111 0.526066 49 2001 083000464T 4900

1100.521327 279 2001 083303478T 4600 1090.516588 129 2001 083001381T 4400 1080.511848 16 2001 083000246T 4400 1070.507109 89 2001 083000840T 3900 106 0.50237 149 2001 083002015T 3900 105 0.49763 30 2001 083000277T 3600 1040.492891 164 2001 083002247T 3560 1030.488152 147 2001 083002009T 3500 102 0.483412 92 2001 083000945T 3200 101 0.478673 158 2001 083002163T 3200 1000.473934 37 2001 083000354T 3100 990.469194 145 2001 083001980T 3000 980.464455 268 2001 083303120T 2900 970.459716 5 2001 083000045T 2900 960.454976 210 2001 083003035T 2800 950.450237 293 2001 083601595T 2800 940.445498 208 2001 083002966T 2700 930.440758 251 2001 083301291T 2700 92 0.436019 34 2001 083000287T 2500.1 91 0.43128 120 2001 083001528T 2500 90 0.42654 207 2001 083002956T 2440 890.421801 133 2001 083001779T 2400 880.417062 243 2001 083300247T 2400 870.412322 284 2001 083600042T 2400 860.407583 102 2001 083001076T 2380 850.402844 256 2001 083302233T 2300 840.398104 128 2001 083001687T 2100 830.393365 146 2001 083002007T 2100 82 0.388626 106 2001 083001092T 2100 81 0.383886 134 2001 083001784T 2100 800.379147 6 2001 083000046T 2100 790.374408 154 2001 083002073T 2060 780.369668 62 2001 083000619T 2000 770.364929 286 2001 083600381T 2000 76 0.36019 42 2001 083000409T 1900 75 0.35545 11 2001 083000142T 1900 740.350711 246 2001 083300466T 1900 730.345972 203 2001 083002869T 1840 72 0.341232 174 2001 083002365T 1630 71 0.336493 287 2001 083601236T 1600 700.331754 214 2001 083003053T 1600 690.327014 245 2001 083300360T 1600 680.322275 66 2001 083000639T 1570 670.317536 107 2001 083001112T 1560 660.312796 13 2001 083000197T 1500 650.308057 173 2001 083002357T 1500 640.303318 200 2001 083002854T 1400 630.298578 276 2001 083303324T 1300.1 62 0.293839 123 2001 083001309T 1300.1 61 0.2891 124 2001 083001598T 1300 60 0.28436 148 2001 083002014T 1100590.279621 20 2001 083000256T 1100

580.274882 36 2001 083000339T 1100 570.270142 141 2001 083001916T 1100 560.265403 137 2001 083001849T 1000.1 550.260664 181 2001 083002552T 1000 540.255924 144 2001 083001946T 991 530.251185 122 2001 083001564T 952 52 0.246445 109 2001 083001181T 942 51 0.241706 242 2001 083099999T 930 500.236967 98 2001 083001054T 882 490.232227 213 2001 083003048T 860 480.227488 180 2001 083002497T 800.1 470.222749 236 2001 083003785T 790 460.218009 192 2001 083002756T 760 45 0.21327 233 2001 083003520T 750 440.208531 38 2001 083000362T 580 430.203791 71 2001 083000704T 570 42 0.199052 161 2001 083002226T 550 41 0.194313 150 2001 083002016T 500.1 400.189573 23 2001 083000264T 500.1 390.184834 283 2001 083303824T 500.1 380.180095 228 2001 083003281T 500.1 370.175355 136 2001 083001823T 472 360.170616 82 2001 083000812T 470 350.165877 127 2001 083001374T 430 340.161137 73 2001 083000706T 420 330.156398 126 2001 083001629T 420 32 0.151659 205 2001 083002929T 402 31 0.146919 171 2001 083002301T 390 30 0.14218 88 2001 083000827T 350 290.137441 41 2001 083000404T 300.1 280.132701 166 2001 083002253T 300.1 270.127962 31 2001 083000281T 300 260.123223 105 2001 083001091T 280 250.118483 178 2001 083002441T 279 240.113744 206 2001 083002942T 263 230.109005 204 2001 083002893T 250.1 22 0.104265 33 2001 083000286T 250.1 21 0.099526 267 2001 083303117T 230 200.094787 193 2001 083002773T 210 190.090047 275 2001 083303308T 200 180.085308 255 2001 083302091T 183 170.080569 250 2001 083301196T 170 160.075829 160 2001 083002225T 160 15 0.07109 57 2001 083000573T 150 140.066351 94 2001 083000973T 150 130.061611 70 2001 083000703T 140 12 0.056872 257 2001 083302243T 130.1 11 0.052133 234 2001 083003521T 130 100.047393 80 2001 083000801T 120 90.042654 93 2001 083000958T 100.1 80.037915 226 2001 083003230T 100.170.033175 28 2001 083000272T 100.1

60.028436 65 2001 083000638T 83 50.023697 112 2001 083001433T 74 40.018957 186 2001 083002609T 73 30.014218 288 2001 083601340T 72 2 0.009479 51 2001 083000479T 69 1 0.004739 297 2001 083603227T 53ug/L ug/L

MTBE_CONC_ TBA_CONC_ Falta

520 0 37,100 1500 1100 37,100 7300 496 37,100 499000 121000 37,100 3520 0 37,100 540 0 37,100 2500 120 37,100 73000 6100 37,100 91000 150000 37,100 90000 57000 37,100 92000 99000 37,100 620000 66000 37,100 65000 22000 37,100 31000 63000 37,100 22000 12000 37,100 180000 14500 37,100 260000 70000 37,100 1210000 26000 37,100 1060000 323000 37,100 190000 0 37,100 44000 16000 37,100 25000 2500 37,100 173000 17200 37,100 21000 58000 37,100 23000 19000 37,100 5000.1 10000.1 37,100 1080 6400 37,100 14500 15400 37,100 17000 45000 37,100 14000 10000.1 37,100 2100 570 37,100 70000 56000 37,100 15000 5900 37,100 2100 10000.1 37,100 99000 6990 37,100 294000 90100 37,100 17300 2480 37,100 43000 110000 37,100 16000 1300 37,100 890 2250 37,100 605000 403000 37,100 85000 52000 37,100 84000 110000 37,100 47000 24000 37,100 6700 620 37,100 280 1800 37,100 3030 2440 37,100 83900 9260 37,10029000 2000 37,100 13000 5000.1 37,100 12100 1020 37,100 990000 0 37,100 13000 13000.1 37,100 8600 970 37,100 470 45 37,100 7130 59700 37,100 2700 2800 37,100 18900 12000 37,100 851000 34300 37,100 1100000 9400 37,100 62000 170000 37,100 34000 160000 37,100 828 950 37,100 25000 9230 37,100 97000 89000 37,100 14000 2300 37,100 8000 38000 37,100 540000 460000 37,100 280000 0 37,100 17000 4100 37,100 4400 4120 37,100 8600 9200 37,100 33000 12000 37,100 42100 52000 37,100 19500 1150 37,100 50000 82000 37,100 3300 57000 37,100 84300 273000 37,100 850 580 37,100 160000 240000 37,100 17400 593 37,100 1200 0 37,100 7100 63000 37,100 11600 2980 37,100 49000 15000 37,100 62000 20000 37,100 40000 50000 37,100 794 243 37,100 247 200 37,100 340000 50.1 37,100 54036 0 37,100 1900 300 37,100 7600 4100 37,100 5100 12000 37,100 300 46000 37,100 13600 3180 37,100 37000 150000 37,100 2800 10000.1 37,100 840 2900 37,100 81000 160000 37,10023000 5600 37,100 240000 200000 37,100 7900 1000 37,100 2100 2400 37,100 12000 6400 37,100 6800 27000 37,100 8000 20000 37,100 8940 1060 37,100 120000 110000 37,100 2200 940 37,100 280 80000 37,100 7900 10000 37,100 350 370 37,100 93000 47000 37,100 290 1700 37,100 25000 4400 37,100 2500 0 37,100 9000 760000 37,100 3600 2500.1 37,100 550000 2000000 37,100 540 400 37,100 76800 4790 37,100 16000 410000 37,100 3900 10000.1 37,100 2400 4500 37,100 1880 12 37,100 7200 2500.1 37,100 22000 95000 37,100 22000 26000 37,100 13000 16000 37,100 8900 4800 37,100 1200 25.1 37,100 1190 10.1 37,100 160000 120000 37,100 5000.1 0 37,100 12300 7920 37,100 1600 5200 37,100 440 0 37,100 401 78 37,100 335 262 37,100 79000 0 37,100 20000 0 37,100 680 77 37,100 21400 3100 37,100 11000 8660 37,100 29000 0 37,100 500.1 120 37,100 46000 2100 37,100 430000 0 37,100 200000 370000 37,100 37000 37000 37,100 21000 1400 37,1003100 21000 37,100 2200 34000 37,100 460 140 37,100 160000 1200 37,100 33000 8600 37,100 5390 1660 37,100 10400 9790 37,100 13300 59100 37,100 620 50.1 37,100 358 2710 37,100 400000 27000 37,100 40000 9100 37,100 160000 25000.1 37,100 110000 16000 37,100 26000 120000 37,100 120000 400000 37,100 5300 11000 37,100 13000 50000.1 37,100 800000 1100000 37,100 390000 85000 37,100 130000 27000 37,100 72000 13000 37,100 6560 120000 37,100 3300 570 37,100 2700 180000 37,100 19000 24000 37,100 3000 1800 37,100 7220 2350 37,100 310 0 37,100 460 600 37,100 370000 170000 37,100 34000 45000 37,100 1700 1000.1 37,100 3900 41000 37,100 3330 2580 37,100 7680 501 37,100 760000 370000 37,100 100000 110000 37,100 250.1 0 37,100 900 840 37,100 11000 2200 37,100 14100 88 37,100 8200 400 37,100 1300 540000 37,100 1800 500.1 37,100 1500 75000 37,100 6400 5500 37,100 200000 13000.1 37,100 1100 0 37,100 15000 7000 37,100 95000 13000 37,100 27000 79000 37,1003900 180000 37,100 2830 4690 37,100 1780 101 37,100 43000 54000 37,100 1000 0 37,100 460 910 37,100 47000 14000 37,100