Count 106 135 3252

Mean 45.6 45.5 45.6

Median 45.7 46.4 46.5

Std. Dev. 0.8 7.1 31.0

Minimum 44.0 13.4 0.0

Maximum 47.1 67.5 179.2

99% t-value 2.362 2.355 2.328

99% UL 48 62 118 6.2

* All concentrations are in units of ppmd@7%O2

Wheelabrator Ridge SO2 Variability Analysis

January 1 to June 6, 2011

Parameter

30-Day 

Rolling 

Average

24-Hour 

Block 

Average

3-Hour 

Rolling 

Average

2011 CISWI 

Limit
1 720 45.440

25 744 45.302

49 768 45.370

73 792 45.291

97 816 45.767

121 840 45.651

145 864 45.483

169 888 45.611

193 912 45.466

217 936 45.192

241 960 44.917

265 984 45.015

289 1008 45.358

313 1032 45.148

337 1056 44.927

361 1080 44.370

385 1104 44.356

409 1128 45.378

433 1152 45.757

457 1176 45.654

481 1200 45.522

505 1224 45.290

529 1248 44.585

553 1272 44.489

577 1296 44.498

601 1320 44.631

625 1344 44.101

649 1368 44.291

673 1392 44.482

697 1416 44.006

721 1440 44.148

745 1464 44.257

769 1488 44.118

793 1512 44.545

817 1536 44.485

841 1560 44.190

865 1584 44.672

889 1608 44.540

913 1632 44.709

937 1656 44.527

961 1680 44.614

985 1704 44.468

1009 1728 44.155

1033 1752 45.016

1057 1776 44.211

1081 1800 45.128

1105 1824 45.684

1129 1848 45.003

Ridge 30-Day Rolling SO2 

Averages January 1-June 6, 

2011

Start 

Hour

End 

Hour

30-Day 

Rolling SO2 

Average 

(ppmc)
1153 1872 45.383

1177 1896 45.029

1201 1920 45.283

1225 1944 45.520

1249 1968 45.537

1273 1992 45.720

1297 2016 45.677

1321 2040 45.775

1345 2064 46.006

1369 2088 46.216

1393 2112 46.302

1417 2136 46.552

1441 2160 46.534

1465 2184 45.939

1489 2208 45.801

1513 2232 45.624

1537 2256 45.558

1561 2280 45.985

1585 2304 45.925

1609 2328 45.996

1633 2352 46.035

1657 2376 46.399

1681 2400 46.662

1705 2424 46.528

1729 2448 46.671

1753 2472 46.051

1777 2496 47.071

1801 2520 46.721

1825 2544 46.571

1849 2568 46.949

1873 2592 46.517

1897 2616 46.855

1921 2640 46.678

1945 2664 46.632

1969 2688 46.637

1993 2712 46.515

2017 2736 46.303

2041 2760 46.275

2065 2784 46.287

2089 2808 45.854

2113 2832 45.730

2137 2856 45.759

2161 2880 45.935

2185 2904 46.680

2209 2928 47.174

2233 2952 46.975

2257 2976 47.101

2281 3000 46.733

2305 3024 46.130

2329 3048 45.912

2353 3072 45.798

2377 3096 45.661

2401 3120 45.508

2425 3144 45.769

2449 3168 45.665
2473 3192 45.684

2497 3216 45.800

2521 3240 45.708

Count 106.000

A.Mean 45.567

Median 45.657

Std Dev 0.822

Variance 0.676

Kurtosis -0.837

Skewness -0.092

Range 3.169

Min 44.006

Max 47.174

99% t-value 2.362

99.5% t-value 2.624

99.9% t-value 3.170

99% UL 47.509

99.5% UL 47.724

99.9% UL 48.173
1 24 47.7033348

25 48 48.2854156

49 72 46.3075066

73 96 38.2962456

97 120 47.3745842

121 144 40.3479195

145 168 44.0991669

169 192 48.9075012

193 216 48.6629143

217 240 45.7191658

241 264 47.7279167

265 288 45.8679161

289 312 43.5037498

313 336 44.1054115

337 360 50.5504265

361 384 40.2504158

385 408 22.6887493

409 432 33.6816673

433 456 46.6966667

457 480 44.4895821

481 504 49.1549988

505 528 67.5145798

529 552 47.4683342

553 576 47.9070778

577 600 43.8995819

601 624 58.855835

625 648 36.047081

649 672 41.4425049

673 696 53.5537567

697 720 42.0754128

721 744 43.5633278

745 768 50.3416634

769 792 43.9349976

793 816 52.5812531

817 840 43.8925018

841 864 35.2970886

865 888 47.9420815

889 912 44.5737495

913 936 40.4191628

937 960 37.4695816

961 984 50.6795845

985 1008 56.1679268

1009 1032 37.1937523

1033 1056 37.4904137

1057 1080 33.8237534

1081 1104 39.8404121

1105 1128 53.3458366

1129 1152 45.0441628

1153 1176 43.6124992

1177 1200 40.5383301

1201 1224 42.1887474

1225 1248 46.346241

Ridge 24-Hour Block SO2 

Averages January 1-June 6, 2011

Start 

Hour

End 

Hour

24-Hour 

Block SO2 

Average 

(ppmc)
1249 1272 44.5933342

1273 1296 48.1962547

1297 1320 47.877079

1321 1344 42.970829

1345 1368 41.7374992

1369 1392 47.1595879

1393 1416 39.2679176

1417 1440 46.3354187

1441 1464 46.8487511

1465 1488 46.1725006

1489 1512 56.7583313

1513 1536 50.7545815

1537 1560 35.0454178

1561 1584 49.7570801

1585 1608 43.9937477

1609 1632 49.6291656

1633 1656 34.9754181

1657 1680 40.0708275

1681 1704 46.2979164

1705 1728 46.779171

1729 1752 63.0279121

1753 1776 13.3466682

1777 1800 61.3287468

1801 1824 56.519165

1825 1848 32.9237518

1849 1872 56.4279213

1873 1896 32.9958305

1897 1920 48.1766624

1921 1944 49.2704163

1945 1968 46.8566628

1969 1992 50.1000023

1993 2016 46.8920898

2017 2040 50.8187447

2041 2064 49.9037476

2065 2088 48.0358429

2089 2112 49.7495842

2113 2136 46.7595863

2137 2160 45.8091698

2161 2184 28.9954166

2185 2208 42.029583

2209 2232 51.4583321

2233 2256 48.7533302

2257 2280 47.8749962

2281 2304 47.9408379

2305 2328 46.1462517

2329 2352 50.782505

2353 2376 45.8975029

2377 2400 47.9758339

2401 2424 42.2716637

2425 2448 51.0529175

2449 2472 44.4270821

2473 2496 43.9695892

2497 2520 50.826664

2521 2544 52.0008278

2545 2568 44.2816658

2569 2592 43.4524994

2593 2616 43.1391602

2617 2640 42.8800049

2641 2664 47.8666649
2665 2688 47.0058403

2689 2712 46.4474983

2713 2736 40.5504227

2737 2760 49.9558372

2761 2784 50.2866707

2785 2808 35.0370865

2809 2832 46.0383339

2833 2856 47.6237488

2857 2880 51.0870857

2881 2904 51.3379211

2905 2928 56.8537407

2929 2952 45.4979134

2953 2976 52.5349998

2977 3000 36.8083344

3001 3024 29.8504181

3025 3048 39.6145821

3049 3072 47.3699989

3073 3096 41.7808304

3097 3120 43.3875008

3121 3144 50.1045799

3145 3168 47.9187469

3169 3192 45.0179138

3193 3216 47.4445801

3217 3240 48.0762596

Count 135

A.Mean 45.52

Median 46.35

Std Dev 7.07

Variance 49.94

Kurtosis 3.74

Skewness -0.79

Range 54.17

Min 13.35

Max 67.51

99% t-value 2.355

99.5% t-value 2.613

99.9% t-value 3.15

99% UL 62.16

99.5% UL 63.99

99.9% UL 67.80
3238 3240 48.33

3239 3241 69.89

3240 3242 95.42

3241 3243 95.75

3242 3244 88.33

3243 3245 71.43

3244 3246 59.58

3245 3247 57.19

3246 3248 61.59

3247 3249 62.49

3248 3250 62.66

3249 3251 59.18

3250 3252 58.63

3251 3253 58.25

3252 3254 56.65

Count 3252

A.Mean 45.62

Median 46.54

Std Dev 30.99

Variance 960.35

Kurtosis -0.37

Skewness 0.44

Range 179.15

Min 0.00

Max 179.15

99% t-value 2.328

99.5% t-value 2.577

99.9% t-value 3.09

99% UL 117.75

99.5% UL 125.49

99.9% UL 141.46