2009 volume II - Cloud Object Storage | Store & …...Figure 3.10: M25 (B) 15-minute mean concentration of sulphur dioxide October 2009 . 55 Figure 3.11: M25 (B) 15-minute mean concentration

Transport Research Laboratory

The Highways Agency roadside air

pollution monitoring network report -

2009 volume II

by J S Price, J Pittman and D Gardiner

CPR1094 (II)RPN1446 (II)

396 (387) HTRL

CLIENT PROJECT REPORT

Transport Research Laboratory

CLIENT PROJECT REPORT CPR1094 (II)

The Highways Agency roadside air pollution monitoring network report - 2009 volume II

by J S Price, J Pittman and D Gardiner (TRL)

Prepared for: Project Record: 396 (387) HTRL

Impact of reduced emissions on air quality -

2009 volume II

Client: Highways Agency

(Andrew Bean)

Copyright Transport Research Laboratory March 2011

The views expressed are those of the author(s) and not necessarily those of Highways

Agency.

Name Date

Approved

Project

Manager Julia Pittman 18/03/2010

Technical

Referee David Gardiner 18/03/2010

Client Project Report

TRL CPR1094 (II)

Contents Amendment Record

This report has been issued and amended as follows

Version Date Description Editor Technical

Referee

1 15/02/2011 The Highways Agency roadside air pollution monitoring network report

– 2009 volume II

Jennifer Price / Julia Pittman

David Gardiner


TRL v CPR1094 (II)

Contents

List of Figures vi

Executive summary xiv

1 Nitrogen dioxide 1

1.1 M4 (Theale 2) 1

1.2 Bell Common Tunnel 7

1.3 M25 (B) 12

1.4 M60 18

2 Ozone 25

2.1 M4 (Theale 2) 25


2.3 M25 (B) 37

2.4 M60 43

3 Sulphur dioxide 50

3.1 15-minute mean 50 3.1.1 M25 (B) 50 3.1.2 M60 56

3.2 1-hour mean 62 3.2.1 M25 (B) 62 3.2.2 M60 68

3.3 24-hour mean 75 3.3.1 M25 (B) 75 3.3.2 M60 81

4 Carbon monoxide 88

4.1 M4 (Theale 2) 88


4.3 M25 (B) 99

4.4 M60 105

5 Particulate Matter 111

5.1 M4 (Theale 2) 111

5.2 M25 (B) 118

5.3 M60 125

6 Historical compliance with air quality standards, limits and objectives 132

7 Historical hourly data summary statistics 135

8 Historical traffic flow summary statistics 154


TRL vi CPR1094 (II)

List of Figures

Figure 1.1: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide January 2009 1

Figure 1.2: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide February 2009

..................................................................................................................... 2

Figure 1.3: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide March 2009 ... 2

Figure 1.4: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide April 2009 ..... 3

Figure 1.5: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide May 2009...... 3

Figure 1.6: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide June 2009 ..... 4

Figure 1.7: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide July 2009 ...... 4

Figure 1.8: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide August 2009 . 5

Figure 1.9: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide September

2009 .............................................................................................................. 5

Figure 1.10: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide October 2009

..................................................................................................................... 6

Figure 1.11: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide November

2009 .............................................................................................................. 6

Figure 1.12: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide December

2009 .............................................................................................................. 7

Figure 1.13: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide January

2009 .............................................................................................................. 7

Figure 1.14: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide

February 2009 ................................................................................................ 8

Figure 1.15: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide March

2009 .............................................................................................................. 8

Figure 1.16: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide April

2009 .............................................................................................................. 9

Figure 1.17: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide May

2009 .............................................................................................................. 9

Figure 1.18: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide June

2009 ............................................................................................................ 10

Figure 1.19: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide July

2009 ............................................................................................................ 10

Figure 1.20: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide August

2009 ............................................................................................................ 11

Figure 1.21: Bell Common Tunnel 1-hour mean concentration of nitrogen dioxide

September 2009 ............................................................................................ 11

Figure 1.22: M25 (B) 1-hour mean concentration of nitrogen dioxide January 2009 ..... 12

Figure 1.23: M25 (B) 1-hour mean concentration of nitrogen dioxide February 2009 ... 13

Figure 1.24: M25 (B) 1-hour mean concentration of nitrogen dioxide March 2009 ....... 13

Figure 1.25: M25 (B) 1-hour mean concentration of nitrogen dioxide April 2009 ......... 14

Figure 1.26: M25 (B) 1-hour mean concentration of nitrogen dioxide May 2009 .......... 14

Figure 1.27: M25 (B) 1-hour mean concentration of nitrogen dioxide June 2009 ......... 15


TRL vii CPR1094 (II)

Figure 1.28: M25 (B) 1-hour mean concentration of nitrogen dioxide July 2009 .......... 15

Figure 1.29: M25 (B) 1-hour mean concentration of nitrogen dioxide August 2009 ...... 16

Figure 1.30: M25 (B) 1-hour mean concentration of nitrogen dioxide September 2009 16

Figure 1.31: M25 (B) 1-hour mean concentration of nitrogen dioxide October 2009 ..... 17

Figure 1.32: M25 (B) 1-hour mean concentration of nitrogen dioxide November 2009 . 17

Figure 1.33: M25 (B) 1-hour mean concentration of nitrogen dioxide December 2009.. 18

Figure 1.34: M60 1-hour mean concentration of nitrogen dioxide January 2009 .......... 18

Figure 1.35: M60 1-hour mean concentration of nitrogen dioxide February 2009 ......... 19

Figure 1.36: M60 1-hour mean concentration of nitrogen dioxide March 2009 ............. 19

Figure 1.37: M60 1-hour mean concentration of nitrogen dioxide April 2009 ............... 20

Figure 1.38: M60 1-hour mean concentration of nitrogen dioxide May 2009 ............... 20

Figure 1.39: M60 1-hour mean concentration of nitrogen dioxide June 2009 ............... 21

Figure 1.40: M60 1-hour mean concentration of nitrogen dioxide July 2009 ................ 21

Figure 1.41: M60 1-hour mean concentration of nitrogen dioxide August 2009 ........... 22

Figure 1.42: M60 1-hour mean concentration of nitrogen dioxide September 2009 ...... 22

Figure 1.43: M60 1-hour mean concentration of nitrogen dioxide October 2009 .......... 23

Figure 1.44: M60 1-hour mean concentration of nitrogen dioxide November 2009 ....... 23

Figure 1.45: M60 1-hour mean concentration of nitrogen dioxide December 2009 ....... 24

Figure 2.1: M4 (Theale 2) running 8-hour mean concentration of ozone January 2009 . 25

Figure 2.2: M4 (Theale 2) running 8-hour mean concentration of ozone February 2009 26

Figure 2.3: M4 (Theale 2) running 8-hour mean concentration of ozone March 2009 ... 26

Figure 2.4: M4 (Theale 2) running 8-hour mean concentration of ozone April 2009...... 27

Figure 2.5: M4 (Theale 2) running 8-hour mean concentration of ozone May 2009 ...... 27

Figure 2.6: M4 (Theale 2) running 8-hour mean concentration of ozone June 2009 ..... 28

Figure 2.7: M4 (Theale 2) running 8-hour mean concentration of ozone July 2009 ...... 28

Figure 2.8: M4 (Theale 2) running 8-hour mean concentration of ozone August 2009 .. 29

Figure 2.9: M4 (Theale 2) running 8-hour mean concentration of ozone September 2009

................................................................................................................... 29

Figure 2.10: M4 (Theale 2) running 8-hour mean concentration of ozone October 2009 30

Figure 2.11: M4 (Theale 2) running 8-hour mean concentration of ozone November 2009

................................................................................................................... 30

Figure 2.12: M4 (Theale 2) running 8-hour mean concentration of ozone December 2009

................................................................................................................... 31

Figure 2.13: Bell Common Tunnel running 8-hour mean concentration of ozone January

2009 ............................................................................................................ 32

Figure 2.14: Bell Common Tunnel running 8-hour mean concentration of ozone February

2009 ............................................................................................................ 33

Figure 2.15: Bell Common Tunnel running 8-hour mean concentration of ozone March

2009 ............................................................................................................ 33

Figure 2.16: Bell Common Tunnel running 8-hour mean concentration of ozone April

2009 ............................................................................................................ 34


TRL viii CPR1094 (II)

Figure 2.17: Bell Common Tunnel running 8-hour mean concentration of ozone May

2009 ............................................................................................................ 34

Figure 2.18: Bell Common Tunnel running 8-hour mean concentration of ozone June

2009 ............................................................................................................ 35

Figure 2.19: Bell Common Tunnel running 8-hour mean concentration of ozone July 2009

................................................................................................................... 35

Figure 2.20: Bell Common Tunnel running 8-hour mean concentration of ozone August

2009 ............................................................................................................ 36

Figure 2.21: Bell Common Tunnel running 8-hour mean concentration of ozone

September 2009 ............................................................................................ 36

Figure 2.22: M25 (B) running 8-hour mean concentration of ozone January 2009 ....... 37

Figure 2.23: M25 (B) running 8-hour mean concentration of ozone February 2009 ...... 38

Figure 2.24: M25 (B) running 8-hour mean concentration of ozone March 2009 .......... 38

Figure 2.25: M25 (B) running 8-hour mean concentration of ozone April 2009 ............ 39

Figure 2.26: M25 (B) running 8-hour mean concentration of ozone May 2009 ............. 39

Figure 2.27: M25 (B) running 8-hour mean concentration of ozone June 2009 ............ 40

Figure 2.28: M25 (B) running 8-hour mean concentration of ozone July 2009 ............. 40

Figure 2.29: M25 (B) running 8-hour mean concentration of ozone August 2009 ......... 41

Figure 2.30: M25 (B) running 8-hour mean concentration of ozone September 2009 ... 41

Figure 2.31: M25 (B) running 8-hour mean concentration of ozone October 2009 ....... 42

Figure 2.32: M25 (B) running 8-hour mean concentration of ozone November 2009 .... 42

Figure 2.33: M25 (B) running 8-hour mean concentration of ozone December 2009 .... 43

Figure 2.34: M60 running 8-hour mean concentration of ozone January 2009 ............. 43

Figure 2.35: M60 running 8-hour mean concentration of ozone February 2009 ........... 44

Figure 2.36: M60 running 8-hour mean concentration of ozone March 2009 ............... 44

Figure 2.37: M60 running 8-hour mean concentration of ozone April 2009 ................. 45

Figure 2.38: M60 running 8-hour mean concentration of ozone May 2009 .................. 45

Figure 2.39: M60 running 8-hour mean concentration of ozone June 2009 ................. 46

Figure 2.40: M60 running 8-hour mean concentration of ozone July 2009 .................. 46

Figure 2.41: M60 running 8-hour mean concentration of ozone August 2009 .............. 47

Figure 2.42: M60 running 8-hour mean concentration of ozone September 2009 ........ 47

Figure 2.43: M60 running 8-hour mean concentration of ozone October 2009 ............. 48

Figure 2.44: M60 running 8-hour mean concentration of ozone November 2009 ......... 48

Figure 2.45: M60 running 8-hour mean concentration of ozone December 2009 .......... 49

Figure 3.1: M25 (B) 15-minute mean concentration of sulphur dioxide January 2009 ... 50

Figure 3.2: M25 (B) 15-minute mean concentration of sulphur dioxide February 2009 . 51

Figure 3.3: M25 (B) 15-minute mean concentration of sulphur dioxide March 2009 ..... 51

Figure 3.4: M25 (B) 15-minute mean concentration of sulphur dioxide April 2009 ....... 52

Figure 3.5: M25 (B) 15-minute mean concentration of sulphur dioxide May 2009 ........ 52

Figure 3.6: M25 (B) 15-minute mean concentration of sulphur dioxide June 2009 ....... 53


TRL ix CPR1094 (II)

Figure 3.7: M25 (B) 15-minute mean concentration of sulphur dioxide July 2009 ........ 53

Figure 3.8: M25 (B) 15-minute mean concentration of sulphur dioxide August 2009 .... 54

Figure 3.9: M25 (B) 15-minute mean concentration of sulphur dioxide September 2009

................................................................................................................... 54

Figure 3.10: M25 (B) 15-minute mean concentration of sulphur dioxide October 2009 . 55

Figure 3.11: M25 (B) 15-minute mean concentration of sulphur dioxide November 2009

................................................................................................................... 55

Figure 3.12: M25 (B) 15-minute mean concentration of sulphur dioxide December 2009

................................................................................................................... 56

Figure 3.13: M60 15-minute mean concentration of sulphur dioxide January 2009 ...... 56

Figure 3.14: M60 15-minute mean concentration of sulphur dioxide February 2009 ..... 57

Figure 3.15: M60 15-minute mean concentration of sulphur dioxide March 2009 ......... 57

Figure 3.16: M60 15-minute mean concentration of sulphur dioxide April 2009 ........... 58

Figure 3.17: M60 15-minute mean concentration of sulphur dioxide May 2009 ............ 58

Figure 3.18: M60 15-minute mean concentration of sulphur dioxide June 2009 ........... 59

Figure 3.19: M60 15-minute mean concentration of sulphur dioxide July 2009 ............ 59

Figure 3.20: M60 15-minute mean concentration of sulphur dioxide August 2009........ 60

Figure 3.21: M60 15-minute mean concentration of sulphur dioxide September 2009 .. 60

Figure 3.22: M60 15-minute mean concentration of sulphur dioxide October 2009 ...... 61

Figure 3.23: M60 15-minute mean concentration of sulphur dioxide November 2009 ... 61

Figure 3.24: M60 15-minute mean concentration of sulphur dioxide December 2009 ... 62

Figure 3.25: M25 (B) 1-hour mean concentration of sulphur dioxide January 2009 ...... 62

Figure 3.26: M25 (B) 1-hour mean concentration of sulphur dioxide February 2009..... 63

Figure 3.27: M25 (B) 1-hour mean concentration of sulphur dioxide March 2009......... 63

Figure 3.28: M25 (B) 1-hour mean concentration of sulphur dioxide April 2009 ........... 64

Figure 3.29: M25 (B) 1-hour mean concentration of sulphur dioxide May 2009 ........... 64

Figure 3.30: M25 (B) 1-hour mean concentration of sulphur dioxide June 2009 .......... 65

Figure 3.31: M25 (B) 1-hour mean concentration of sulphur dioxide July 2009 ........... 65

Figure 3.32: M25 (B) 1-hour mean concentration of sulphur dioxide August 2009 ....... 66

Figure 3.33: M25 (B) 1-hour mean concentration of sulphur dioxide September 2009 .. 66

Figure 3.34: M25 (B) 1-hour mean concentration of sulphur dioxide October 2009 ...... 67

Figure 3.35: M25 (B) 1-hour mean concentration of sulphur dioxide November 2009 ... 67

Figure 3.36: M25 (B) 1-hour mean concentration of sulphur dioxide December 2009 ... 68

Figure 3.37: M60 1-hour mean concentration of sulphur dioxide January 2009 ........... 68

Figure 3.38: M60 1-hour mean concentration of sulphur dioxide February 2009 .......... 69

Figure 3.39: M60 1-hour mean concentration of sulphur dioxide March 2009 .............. 69

Figure 3.40: M60 1-hour mean concentration of sulphur dioxide April 2009 ................ 70

Figure 3.41: M60 1-hour mean concentration of sulphur dioxide May 2009 ................. 70

Figure 3.42: M60 1-hour mean concentration of sulphur dioxide June 2009 ................ 71


TRL x CPR1094 (II)

Figure 3.43: M60 1-hour mean concentration of sulphur dioxide July 2009 ................. 71

Figure 3.44: M60 1-hour mean concentration of sulphur dioxide August 2009 ............. 72

Figure 3.45: M60 1-hour mean concentration of sulphur dioxide September 2009 ....... 72

Figure 3.46: M60 1-hour mean concentration of sulphur dioxide October 2009 ........... 73

Figure 3.47: M60 1-hour mean concentration of sulphur dioxide November 2009 ........ 73

Figure 3.48: M60 1-hour mean concentration of sulphur dioxide December 2009 ........ 74

Figure 3.49: M25 (B) 24-hour mean concentration of sulphur dioxide January 2009 .... 75

Figure 3.50: M25 (B) 24-hour mean concentration of sulphur dioxide February 2009 ... 76

Figure 3.51: M25 (B) 24-hour mean concentration of sulphur dioxide March 2009 ....... 76

Figure 3.52: M25 (B) 24-hour mean concentration of sulphur dioxide April 2009 ......... 77

Figure 3.53: M25 (B) 24-hour mean concentration of sulphur dioxide May 2009 ......... 77

Figure 3.54: M25 (B) 24-hour mean concentration of sulphur dioxide June 2009 ......... 78

Figure 3.55: M25 (B) 24-hour mean concentration of sulphur dioxide July 2009 .......... 78

Figure 3.56: M25 (B) 24-hour mean concentration of sulphur dioxide August 2009 ..... 79

Figure 3.57: M25 (B) 24-hour mean concentration of sulphur dioxide September 2009 79

Figure 3.58: M25 (B) 24-hour mean concentration of sulphur dioxide October 2009 .... 80

Figure 3.59: M25 (B) 24-hour mean concentration of sulphur dioxide November 2009 . 80

Figure 3.60: M25 (B) 24-hour mean concentration of sulphur dioxide December 2009 . 81

Figure 3.61: M60 24-hour mean concentration of sulphur dioxide January 2009 .......... 81

Figure 3.62: M60 24-hour mean concentration of sulphur dioxide February 2009 ........ 82

Figure 3.63: M60 24-hour mean concentration of sulphur dioxide March 2009 ............ 82

Figure 3.64: M60 24-hour mean concentration of sulphur dioxide April 2009 .............. 83

Figure 3.65: M60 24-hour mean concentration of sulphur dioxide May 2009 ............... 83

Figure 3.66: M60 24-hour mean concentration of sulphur dioxide June 2009 .............. 84

Figure 3.67: M60 24-hour mean concentration of sulphur dioxide July 2009 ............... 84

Figure 3.68: M60 24-hour mean concentration of sulphur dioxide August 2009 ........... 85

Figure 3.69: M60 24-hour mean concentration of sulphur dioxide September 2009 ..... 85

Figure 3.70: M60 24-hour mean concentration of sulphur dioxide October 2009 .......... 86

Figure 3.71: M60 24-hour mean concentration of sulphur dioxide November 2009 ...... 86

Figure 3.72: M60 24-hour mean concentration of sulphur dioxide December 2009 ...... 87

Figure 4.1: M4 (Theale 2) running 8-hour mean concentration of carbon monoxide

January 2009 ................................................................................................ 88


February 2009 .............................................................................................. 89

Figure 4.3: M4 (Theale 2) running 8-hour mean concentration of carbon monoxide March

2009 ............................................................................................................ 89

Figure 4.4: M4 (Theale 2) running 8-hour mean concentration of carbon monoxide April

2009 ............................................................................................................ 90

Figure 4.5: M4 (Theale 2) running 8-hour mean concentration of carbon monoxide May

2009 ............................................................................................................ 90


TRL xi CPR1094 (II)

Figure 4.6: M4 (Theale 2) running 8-hour mean concentration of carbon monoxide June

2009 ............................................................................................................ 91

Figure 4.7: M4 (Theale 2) running 8-hour mean concentration of carbon monoxide July

2009 ............................................................................................................ 91


August 2009 ................................................................................................. 92


September 2009 ............................................................................................ 92


October 2009 ................................................................................................ 93


November 2009 ............................................................................................. 93


December 2009 ............................................................................................. 94

Figure 4.13: Bell Common Tunnel running 8-hour mean concentration of carbon

monoxide January 2009 ................................................................................. 94


monoxide February 2009 ................................................................................ 95


monoxide March 2009 .................................................................................... 95


monoxide April 2009 ...................................................................................... 96


monoxide May 2009 ....................................................................................... 96


monoxide June 2009 ...................................................................................... 97


monoxide July 2009 ....................................................................................... 97


monoxide August 2009 ................................................................................... 98


monoxide September 2009 ............................................................................. 98

Figure 4.22: M25 (B) running 8-hour mean concentration of carbon monoxide January

2009 ............................................................................................................ 99

Figure 4.23: M25 (B) running 8-hour mean concentration of carbon monoxide February

2009 ............................................................................................................ 99

Figure 4.24: M25 (B) running 8-hour mean concentration of carbon monoxide March

2009 .......................................................................................................... 100

Figure 4.25: M25 (B) running 8-hour mean concentration of carbon monoxide April 2009

................................................................................................................. 100

Figure 4.26: M25 (B) running 8-hour mean concentration of carbon monoxide May 2009

................................................................................................................. 101

Figure 4.27: M25 (B) running 8-hour mean concentration of carbon monoxide June 2009

................................................................................................................. 101

Figure 4.28: M25 (B) running 8-hour mean concentration of carbon monoxide July 2009

................................................................................................................. 102


TRL xii CPR1094 (II)

Figure 4.29: M25 (B) running 8-hour mean concentration of carbon monoxide August

2009 .......................................................................................................... 102

Figure 4.30: M25 (B) running 8-hour mean concentration of carbon monoxide September

2009 .......................................................................................................... 103

Figure 4.31: M25 (B) running 8-hour mean concentration of carbon monoxide October

2009 .......................................................................................................... 103

Figure 4.32: M25 (B) running 8-hour mean concentration of carbon monoxide November

2009 .......................................................................................................... 104

Figure 4.33: M25 (B) running 8-hour mean concentration of carbon monoxide December

2009 .......................................................................................................... 104

Figure 4.34: M60 running 8-hour mean concentration of carbon monoxide January 2009

................................................................................................................. 105

Figure 4.35: M60 running 8-hour mean concentration of carbon monoxide February 2009

................................................................................................................. 105

Figure 4.36: M60 running 8-hour mean concentration of carbon monoxide March 2009

................................................................................................................. 106

Figure 4.37: M60 running 8-hour mean concentration of carbon monoxide April 2009 106

Figure 4.38: M60 running 8-hour mean concentration of carbon monoxide May 2009 107

Figure 4.39: M60 running 8-hour mean concentration of carbon monoxide June 2009 107

Figure 4.40: M60 running 8-hour mean concentration of carbon monoxide July 2009 108

Figure 4.41: M60 running 8-hour mean concentration of carbon monoxide August 2009

................................................................................................................. 108

Figure 4.42: M60 running 8-hour mean concentration of carbon monoxide September

2009 .......................................................................................................... 109

Figure 4.43: M60 running 8-hour mean concentration of carbon monoxide October 2009

................................................................................................................. 109

Figure 4.44: M60 running 8-hour mean concentration of carbon monoxide November

2009 .......................................................................................................... 110

Figure 4.45: M60 running 8-hour mean concentration of carbon monoxide December

2009 .......................................................................................................... 110

Figure 5.1: M4 (Theale 2) 24-hour mean concentration of particulate matter January

2009 .......................................................................................................... 111

Figure 5.2: M4 (Theale 2) 24-hour mean concentration of particulate matter February

2009 .......................................................................................................... 112

Figure 5.3: M4 (Theale 2) 24-hour mean concentration of particulate matter March 2009

................................................................................................................. 112

Figure 5.4: M4 (Theale 2) 24-hour mean concentration of particulate matter April 2009

................................................................................................................. 113

Figure 5.5: M4 (Theale 2) 24-hour mean concentration of particulate matter May 2009

................................................................................................................. 113

Figure 5.6: M4 (Theale 2) 24-hour mean concentration of particulate matter June 2009

................................................................................................................. 114

Figure 5.7: M4 (Theale 2) 24-hour mean concentration of particulate matter July 2009

................................................................................................................. 114


TRL xiii CPR1094 (II)

Figure 5.8: M4 (Theale 2) 24-hour mean concentration of particulate matter August

2009 .......................................................................................................... 115

Figure 5.9: M4 (Theale 2) 24-hour mean concentration of particulate matter September

2009 .......................................................................................................... 115

Figure 5.10: M4 (Theale 2) 24-hour mean concentration of particulate matter October

2009 .......................................................................................................... 116

Figure 5.11: M4 (Theale 2) 24-hour mean concentration of particulate matter November

2009 .......................................................................................................... 116

Figure 5.12: M4 (Theale 2) 24-hour mean concentration of particulate matter December

2009 .......................................................................................................... 117

Figure 5.13: M25 (B) 24-hour mean concentration of particulate matter January 2009

................................................................................................................. 118

Figure 5.14: M25 (B) 24-hour mean concentration of particulate matter February 2009

................................................................................................................. 119

Figure 5.15: M25 (B) 24-hour mean concentration of particulate matter March 2009 . 119

Figure 5.16: M25 (B) 24-hour mean concentration of particulate matter April 2009 ... 120

Figure 5.17: M25 (B) 24-hour mean concentration of particulate matter May 2009 .... 120

Figure 5.18: M25 (B) 24-hour mean concentration of particulate matter June 2009 ... 121

Figure 5.19: M25 (B) 24-hour mean concentration of particulate matter July 2009 .... 121

Figure 5.20: M25 (B) 24-hour mean concentration of particulate matter August 2009 122

Figure 5.21: M25 (B) 24-hour mean concentration of particulate matter September 2009

................................................................................................................. 122

Figure 5.22: M25 (B) 24-hour mean concentration of particulate matter October 2009

................................................................................................................. 123

Figure 5.23: M25 (B) 24-hour mean concentration of particulate matter November 2009

................................................................................................................. 123

Figure 5.24: M25 (B) 24-hour mean concentration of particulate matter December 2009

................................................................................................................. 124

Figure 5.25: M60 24-hour mean concentration of particulate matter January 2009 .... 125

Figure 5.26: M60 24-hour mean concentration of particulate matter February 2009 .. 126

Figure 5.27: M60 24-hour mean concentration of particulate matter March 2009 ...... 126

Figure 5.28: M60 24-hour mean concentration of particulate matter April 2009 ........ 127

Figure 5.29: M60 24-hour mean concentration of particulate matter May 2009 ......... 127

Figure 5.30: M60 24-hour mean concentration of particulate matter June 2009 ........ 128

Figure 5.31: M60 24-hour mean concentration of particulate matter July 2009 ......... 128

Figure 5.32: M60 24-hour mean concentration of particulate matter August 2009 ..... 129

Figure 5.33: M60 24-hour mean concentration of particulate matter September 2009 129

Figure 5.34: M60 24-hour mean concentration of particulate matter October 2009 .... 130

Figure 5.35: M60 24-hour mean concentration of particulate matter November 2009 130

Figure 5.36: M60 24-hour mean concentration of particulate matter December 2009 . 131


TRL xiv CPR1094 (II)

Executive summary

This report is Volume II of the ninth report in a series summarising air pollutant

concentrations, meteorological data and traffic flows measured at sites across the

Highways Agency long term roadside monitoring network. The network comprises four

monitoring sites located on the M4, M25 and M60 motorways and in the Bell Common

Tunnel on the M25 motorway. Concentrations of carbon monoxide (CO), oxides of

nitrogen (NOX), nitric oxide (NO), nitrogen dioxide (NO2), particulate matter (PM10 and

PM2.5) and ozone (O3) were measured at all sites in 2009. In addition, concentrations of

total hydrocarbons (methane (CH4) and non-methane hydrocarbons (HC)) and ammonia

(NH3) were measured at the M4, M25 and M60 motorway sites and concentrations of

sulphur dioxide (SO2), hydrogen sulphide (H2S), aromatic hydrocarbons, polycyclic

aromatic hydrocarbons (PAH), aldehydes and metals were measured at the M25 and M60

motorway sites. Volume II of the report presents time-series plots for pollutant

concentrations recorded at the four monitoring sites in 2009. The pollutants presented

in this format are those covered by the Air Quality (England) Regulations 2000 (SI 2000

No. 928) and the Air Quality (England) (Amendment) Regulations 2002 (SI 2002 No.

3043) i.e. NO2, SO2, O3, PM10 and CO.


TRL 1 CPR1094 (II)

1 Nitrogen dioxide

1.1 M4 (Theale 2)

Figure 1.1: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide

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M4 (Theale 2) - January 20091-hour mean concentration of nitrogen dioxide

UK Air Quality objective: 200 µg/m3


TRL 2 CPR1094 (II)


February 2009

Figure 1.3: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide March

2009

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28

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - February 20091-hour mean concentration of nitrogen dioxide


Span and zero calibrationInstrument fault

0

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - March 20091-hour mean concentration of nitrogen dioxide


Span and zero calibration


TRL 3 CPR1094 (II)

Figure 1.4: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide April

2009

Figure 1.5: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide May

2009

0

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30

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - April 20091-hour mean concentration of nitrogen dioxide



Instrument faultInstrument fault

Valid: high O3 concentrations observed

0

20

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31

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - May 20091-hour mean concentration of nitrogen dioxide


Instrument fault Span and zero calibrationValid: high O3 concentrations observed



TRL 4 CPR1094 (II)

Figure 1.6: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide June

2009

Figure 1.7: M4 (Theale 2) 1-hour mean concentration of nitrogen dioxide July

2009

0

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30

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - June 20091-hour mean concentration of nitrogen dioxide


0

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28

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09

30

/07

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09

31

/07

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - July 20091-hour mean concentration of nitrogen dioxide



Valid: low O3 concentrations observed


TRL 5 CPR1094 (II)


August 2009


September 2009

0

20

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29

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30

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31

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - August 20091-hour mean concentration of nitrogen dioxide



Instrument faultRemoved from site and replaced with anotherAPI


0

20

40

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180

200

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01

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30

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - September 20091-hour mean concentration of nitrogen dioxide





TRL 6 CPR1094 (II)


October 2009


November 2009

0

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28

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29

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09

30

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09

31

/10

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - October 20091-hour mean concentration of nitrogen dioxide



0

20

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01

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19

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28

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29

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09

30

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - November 20091-hour mean concentration of nitrogen dioxide



TRL 7 CPR1094 (II)


December 2009

1.2 Bell Common Tunnel

Figure 1.13: Bell Common Tunnel 1-hour mean concentration of nitrogen

dioxide January 2009

0

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29

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30

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09

31

/12

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - December 2009 1-hour mean concentration of nitrogen dioxide



Valid: high O3

concentrations observed

Valid data

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

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800

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900

950

1000

01

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04

/01

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05

/01

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06

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07

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10

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11

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12

/01

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13

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14

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15

/01

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16

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17

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18

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09

19

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20

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21

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22

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23

/01

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24

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25

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26

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27

/01

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09

28

/01

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09

29

/01

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09

30

/01

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09

31

/01

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - January 20091-hour mean concentration of nitrogen dioxide



TRL 8 CPR1094 (II)


dioxide February 2009


dioxide March 2009

0

50

100

150

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250

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450

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27

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09

28

/02

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - February 2009 1-hour mean concentration of nitrogen dioxide


Valid: peak traffic 4-5 pm

Valid data

Valid dataValid data

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

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900

950

1000

01

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16

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24

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25

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26

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27

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09

28

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09

29

/03

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09

30

/03

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09

31

/03

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - March 20091-hour mean concentration of nitrogen dioxide


Valid data

Invalid data


TRL 9 CPR1094 (II)


dioxide April 2009


dioxide May 2009

0

50

100

150

200

250

300

350

400

450

500

550

600

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700

750

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1000

01

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18

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25

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26

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09

27

/04

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09

28

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09

29

/04

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09

30

/04

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - April 2009 1-hour mean concentration of nitrogen dioxide



Valid: peaktraffic 6-9 am

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

01

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08

/05

/20

09

09

/05

/20

09

10

/05

/20

09

11

/05

/20

09

12

/05

/20

09

13

/05

/20

09

14

/05

/20

09

15

/05

/20

09

16

/05

/20

09

17

/05

/20

09

18

/05

/20

09

19

/05

/20

09

20

/05

/20

09

21

/05

/20

09

22

/05

/20

09

23

/05

/20

09

24

/05

/20

09

25

/05

/20

09

26

/05

/20

09

27

/05

/20

09

28

/05

/20

09

29

/05

/20

09

30

/05

/20

09

31

/05

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - May 20091-hour mean concentration of nitrogen dioxide


Valid: peak traffic 9-10 am


TRL 10 CPR1094 (II)


dioxide June 2009


dioxide July 2009

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

01

/06

/20

09

02

/06

/20

09

03

/06

/20

09

04

/06

/20

09

05

/06

/20

09

06

/06

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09

07

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09

08

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09

09

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09

10

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09

11

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09

12

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09

13

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09

14

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09

15

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09

16

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09

17

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/20

09

18

/06

/20

09

19

/06

/20

09

20

/06

/20

09

21

/06

/20

09

22

/06

/20

09

23

/06

/20

09

24

/06

/20

09

25

/06

/20

09

26

/06

/20

09

27

/06

/20

09

28

/06

/20

09

29

/06

/20

09

30

/06

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - June 20091-hour mean concentration of nitrogen dioxide



Valid: peak traffic 4-5pm

Valid: peak traffic 3-5 pm

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

01

/07

/20

09

02

/07

/20

09

03

/07

/20

09

04

/07

/20

09

05

/07

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09

06

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09

07

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09

08

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09

09

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09

10

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09

11

/07

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09

12

/07

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09

13

/07

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09

14

/07

/20

09

15

/07

/20

09

16

/07

/20

09

17

/07

/20

09

18

/07

/20

09

19

/07

/20

09

20

/07

/20

09

21

/07

/20

09

22

/07

/20

09

23

/07

/20

09

24

/07

/20

09

25

/07

/20

09

26

/07

/20

09

27

/07

/20

09

28

/07

/20

09

29

/07

/20

09

30

/07

/20

09

31

/07

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - July 20091-hour mean concentration of nitrogen dioxide


Instrument fault

Valid: peak traffic 4-5pm


TRL 11 CPR1094 (II)


dioxide August 2009


dioxide September 2009

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

01

/08

/20

09

02

/08

/20

09

03

/08

/20

09

04

/08

/20

09

05

/08

/20

09

06

/08

/20

09

07

/08

/20

09

08

/08

/20

09

09

/08

/20

09

10

/08

/20

09

11

/08

/20

09

12

/08

/20

09

13

/08

/20

09

14

/08

/20

09

15

/08

/20

09

16

/08

/20

09

17

/08

/20

09

18

/08

/20

09

19

/08

/20

09

20

/08

/20

09

21

/08

/20

09

22

/08

/20

09

23

/08

/20

09

24

/08

/20

09

25

/08

/20

09

26

/08

/20

09

27

/08

/20

09

28

/08

/20

09

29

/08

/20

09

30

/08

/20

09

31

/08

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - August 20091-hour mean concentration of nitrogen dioxide


Valid: peak traffic 6-8 am

Instrument fault


0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

01

/09

/20

09

02

/09

/20

09

03

/09

/20

09

04

/09

/20

09

05

/09

/20

09

06

/09

/20

09

07

/09

/20

09

08

/09

/20

09

09

/09

/20

09

10

/09

/20

09

11

/09

/20

09

12

/09

/20

09

13

/09

/20

09

14

/09

/20

09

15

/09

/20

09

16

/09

/20

09

17

/09

/20

09

18

/09

/20

09

19

/09

/20

09

20

/09

/20

09

21

/09

/20

09

22

/09

/20

09

23

/09

/20

09

24

/09

/20

09

25

/09

/20

09

26

/09

/20

09

27

/09

/20

09

28

/09

/20

09

29

/09

/20

09

30

/09

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - September 20091-hour mean concentration of nitrogen dioxide


Power failure

Instrument removed from site


TRL 12 CPR1094 (II)

1.3 M25 (B)

Figure 1.22: M25 (B) 1-hour mean concentration of nitrogen dioxide January

2009

0

20

40

60

80

100

120

140

160

180

200

220

240

01

/01

/20

09

02

/01

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09

03

/01

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09

04

/01

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09

05

/01

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09

06

/01

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09

07

/01

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09

08

/01

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09

09

/01

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09

10

/01

/20

09

11

/01

/20

09

12

/01

/20

09

13

/01

/20

09

14

/01

/20

09

15

/01

/20

09

16

/01

/20

09

17

/01

/20

09

18

/01

/20

09

19

/01

/20

09

20

/01

/20

09

21

/01

/20

09

22

/01

/20

09

23

/01

/20

09

24

/01

/20

09

25

/01

/20

09

26

/01

/20

09

27

/01

/20

09

28

/01

/20

09

29

/01

/20

09

30

/01

/20

09

31

/01

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - January 20091-hour mean concentration of nitrogen dioxide


Power failure


TRL 13 CPR1094 (II)

Figure 1.23: M25 (B) 1-hour mean concentration of nitrogen dioxide February

2009

Figure 1.24: M25 (B) 1-hour mean concentration of nitrogen dioxide March

2009

0

20

40

60

80

100

120

140

160

180

200

220

240

01

/02

/20

09

02

/02

/20

09

03

/02

/20

09

04

/02

/20

09

05

/02

/20

09

06

/02

/20

09

07

/02

/20

09

08

/02

/20

09

09

/02

/20

09

10

/02

/20

09

11

/02

/20

09

12

/02

/20

09

13

/02

/20

09

14

/02

/20

09

15

/02

/20

09

16

/02

/20

09

17

/02

/20

09

18

/02

/20

09

19

/02

/20

09

20

/02

/20

09

21

/02

/20

09

22

/02

/20

09

23

/02

/20

09

24

/02

/20

09

25

/02

/20

09

26

/02

/20

09

27

/02

/20

09

28

/02

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - February 20091-hour mean concentration of nitrogen dioxide



0

20

40

60

80

100

120

140

160

180

200

220

240

01

/03

/20

09

02

/03

/20

09

03

/03

/20

09

04

/03

/20

09

05

/03

/20

09

06

/03

/20

09

07

/03

/20

09

08

/03

/20

09

09

/03

/20

09

10

/03

/20

09

11

/03

/20

09

12

/03

/20

09

13

/03

/20

09

14

/03

/20

09

15

/03

/20

09

16

/03

/20

09

17

/03

/20

09

18

/03

/20

09

19

/03

/20

09

20

/03

/20

09

21

/03

/20

09

22

/03

/20

09

23

/03

/20

09

24

/03

/20

09

25

/03

/20

09

26

/03

/20

09

27

/03

/20

09

28

/03

/20

09

29

/03

/20

09

30

/03

/20

09

31

/03

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - March 20091-hour mean concentration of nitrogen dioxide


Valid: high O3




TRL 14 CPR1094 (II)

Figure 1.25: M25 (B) 1-hour mean concentration of nitrogen dioxide April 2009

Figure 1.26: M25 (B) 1-hour mean concentration of nitrogen dioxide May 2009

0

20

40

60

80

100

120

140

160

180

200

220

240

01

/04

/20

09

02

/04

/20

09

03

/04

/20

09

04

/04

/20

09

05

/04

/20

09

06

/04

/20

09

07

/04

/20

09

08

/04

/20

09

09

/04

/20

09

10

/04

/20

09

11

/04

/20

09

12

/04

/20

09

13

/04

/20

09

14

/04

/20

09

15

/04

/20

09

16

/04

/20

09

17

/04

/20

09

18

/04

/20

09

19

/04

/20

09

20

/04

/20

09

21

/04

/20

09

22

/04

/20

09

23

/04

/20

09

24

/04

/20

09

25

/04

/20

09

26

/04

/20

09

27

/04

/20

09

28

/04

/20

09

29

/04

/20

09

30

/04

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - April 2009 1-hour mean concentration of nitrogen dioxide


Valid data

0

20

40

60

80

100

120

140

160

180

200

220

240

01

/05

/20

09

02

/05

/20

09

03

/05

/20

09

04

/05

/20

09

05

/05

/20

09

06

/05

/20

09

07

/05

/20

09

08

/05

/20

09

09

/05

/20

09

10

/05

/20

09

11

/05

/20

09

12

/05

/20

09

13

/05

/20

09

14

/05

/20

09

15

/05

/20

09

16

/05

/20

09

17

/05

/20

09

18

/05

/20

09

19

/05

/20

09

20

/05

/20

09

21

/05

/20

09

22

/05

/20

09

23

/05

/20

09

24

/05

/20

09

25

/05

/20

09

26

/05

/20

09

27

/05

/20

09

28

/05

/20

09

29

/05

/20

09

30

/05

/20

09

31

/05

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - May 20091-hour mean concentration of nitrogen dioxide


Span and zero calibrationValid: high O3



TRL 15 CPR1094 (II)

Figure 1.27: M25 (B) 1-hour mean concentration of nitrogen dioxide June 2009

Figure 1.28: M25 (B) 1-hour mean concentration of nitrogen dioxide July 2009

0

20

40

60

80

100

120

140

160

180

200

220

240

01

/06

/20

09

02

/06

/20

09

03

/06

/20

09

04

/06

/20

09

05

/06

/20

09

06

/06

/20

09

07

/06

/20

09

08

/06

/20

09

09

/06

/20

09

10

/06

/20

09

11

/06

/20

09

12

/06

/20

09

13

/06

/20

09

14

/06

/20

09

15

/06

/20

09

16

/06

/20

09

17

/06

/20

09

18

/06

/20

09

19

/06

/20

09

20

/06

/20

09

21

/06

/20

09

22

/06

/20

09

23

/06

/20

09

24

/06

/20

09

25

/06

/20

09

26

/06

/20

09

27

/06

/20

09

28

/06

/20

09

29

/06

/20

09

30

/06

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - June 20091-hour mean concentration of nitrogen dioxide





0

20

40

60

80

100

120

140

160

180

200

220

240

01

/07

/20

09

02

/07

/20

09

03

/07

/20

09

04

/07

/20

09

05

/07

/20

09

06

/07

/20

09

07

/07

/20

09

08

/07

/20

09

09

/07

/20

09

10

/07

/20

09

11

/07

/20

09

12

/07

/20

09

13

/07

/20

09

14

/07

/20

09

15

/07

/20

09

16

/07

/20

09

17

/07

/20

09

18

/07

/20

09

19

/07

/20

09

20

/07

/20

09

21

/07

/20

09

22

/07

/20

09

23

/07

/20

09

24

/07

/20

09

25

/07

/20

09

26

/07

/20

09

27

/07

/20

09

28

/07

/20

09

29

/07

/20

09

30

/07

/20

09

31

/07

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - July 20091-hour mean concentration of nitrogen dioxide



Valid data


Valid: high O3



TRL 16 CPR1094 (II)

Figure 1.29: M25 (B) 1-hour mean concentration of nitrogen dioxide August

2009

Figure 1.30: M25 (B) 1-hour mean concentration of nitrogen dioxide September

2009

0

20

40

60

80

100

120

140

160

180

200

220

240

01

/08

/20

09

02

/08

/20

09

03

/08

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09

04

/08

/20

09

05

/08

/20

09

06

/08

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09

07

/08

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09

08

/08

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09

09

/08

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09

10

/08

/20

09

11

/08

/20

09

12

/08

/20

09

13

/08

/20

09

14

/08

/20

09

15

/08

/20

09

16

/08

/20

09

17

/08

/20

09

18

/08

/20

09

19

/08

/20

09

20

/08

/20

09

21

/08

/20

09

22

/08

/20

09

23

/08

/20

09

24

/08

/20

09

25

/08

/20

09

26

/08

/20

09

27

/08

/20

09

28

/08

/20

09

29

/08

/20

09

30

/08

/20

09

31

/08

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - August 20091-hour mean concentration of nitrogen dioxide



0

20

40

60

80

100

120

140

160

180

200

220

240

01

/09

/20

09

02

/09

/20

09

03

/09

/20

09

04

/09

/20

09

05

/09

/20

09

06

/09

/20

09

07

/09

/20

09

08

/09

/20

09

09

/09

/20

09

10

/09

/20

09

11

/09

/20

09

12

/09

/20

09

13

/09

/20

09

14

/09

/20

09

15

/09

/20

09

16

/09

/20

09

17

/09

/20

09

18

/09

/20

09

19

/09

/20

09

20

/09

/20

09

21

/09

/20

09

22

/09

/20

09

23

/09

/20

09

24

/09

/20

09

25

/09

/20

09

26

/09

/20

09

27

/09

/20

09

28

/09

/20

09

29

/09

/20

09

30

/09

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - September 20091-hour mean concentration of nitrogen dioxide



Valid: high O3




TRL 17 CPR1094 (II)

Figure 1.31: M25 (B) 1-hour mean concentration of nitrogen dioxide October

2009

Figure 1.32: M25 (B) 1-hour mean concentration of nitrogen dioxide November

2009

0

20

40

60

80

100

120

140

160

180

200

220

240

01

/10

/20

09

02

/10

/20

09

03

/10

/20

09

04

/10

/20

09

05

/10

/20

09

06

/10

/20

09

07

/10

/20

09

08

/10

/20

09

09

/10

/20

09

10

/10

/20

09

11

/10

/20

09

12

/10

/20

09

13

/10

/20

09

14

/10

/20

09

15

/10

/20

09

16

/10

/20

09

17

/10

/20

09

18

/10

/20

09

19

/10

/20

09

20

/10

/20

09

21

/10

/20

09

22

/10

/20

09

23

/10

/20

09

24

/10

/20

09

25

/10

/20

09

26

/10

/20

09

27

/10

/20

09

28

/10

/20

09

29

/10

/20

09

30

/10

/20

09

31

/10

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - October 20091-hour mean concentration of nitrogen dioxide

UK Air Quality objective: 200 µg/m3Valid: high O3

concentrations observed Valid: high O3 concentrations observed

Valid: low O3


0

20

40

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Co

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M25 (B) - November 20091-hour mean concentration of nitrogen dioxide


Power failurePower failure


TRL 18 CPR1094 (II)

Figure 1.33: M25 (B) 1-hour mean concentration of nitrogen dioxide December

2009

1.4 M60

Figure 1.34: M60 1-hour mean concentration of nitrogen dioxide January 2009

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Date

M25 (B) - December 20091-hour mean concentration of nitrogen dioxide



Valid: low O3


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Co

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Date

M60 - January 20091-hour mean concentration of nitrogen dioxide


Power failure


TRL 19 CPR1094 (II)

Figure 1.35: M60 1-hour mean concentration of nitrogen dioxide February 2009

Figure 1.36: M60 1-hour mean concentration of nitrogen dioxide March 2009

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Date

M60 - February 20091-hour mean concentration of nitrogen dioxide



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Co

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Date

M60 - March 20091-hour mean concentration of nitrogen dioxide



TRL 20 CPR1094 (II)

Figure 1.37: M60 1-hour mean concentration of nitrogen dioxide April 2009

Figure 1.38: M60 1-hour mean concentration of nitrogen dioxide May 2009

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Co

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Date

M60 - April 20091-hour mean concentration of nitrogen dioxide




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Co

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Date

M60 - May 20091-hour mean concentration of nitrogen dioxide




TRL 21 CPR1094 (II)

Figure 1.39: M60 1-hour mean concentration of nitrogen dioxide June 2009

Figure 1.40: M60 1-hour mean concentration of nitrogen dioxide July 2009

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Co

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Date

M60 - June 20091-hour mean concentration of nitrogen dioxide



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Co

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Date

M60 - July 20091-hour mean concentration of nitrogen dioxide





TRL 22 CPR1094 (II)

Figure 1.41: M60 1-hour mean concentration of nitrogen dioxide August 2009

Figure 1.42: M60 1-hour mean concentration of nitrogen dioxide September

2009

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Co

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M60 - August 20091-hour mean concentration of nitrogen dioxide


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Co

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Date

M60 - September 20091-hour mean concentration of nitrogen dioxide


Span and zero calibration Span and zero calibration


TRL 23 CPR1094 (II)

Figure 1.43: M60 1-hour mean concentration of nitrogen dioxide October 2009

Figure 1.44: M60 1-hour mean concentration of nitrogen dioxide November

2009

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Co

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Date

M60 - October 20091-hour mean concentration of nitrogen dioxide


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Co

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Date

M60 - November 20091-hour mean concentration of nitrogen dioxide


Span and zero calibrationSpan and zero calibration



TRL 24 CPR1094 (II)

Figure 1.45: M60 1-hour mean concentration of nitrogen dioxide December

2009

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Co

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Date

M60 - December 20091-hour mean concentration of nitrogen dioxide

UK Air Quality objective: 200 µg/m3Valid: high O3 concentrations observed


TRL 25 CPR1094 (II)

2 Ozone

2.1 M4 (Theale 2)

Figure 2.1: M4 (Theale 2) running 8-hour mean concentration of ozone January

2009

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Co

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Date

M4 (Theale 2) - January 2009Running 8-hour mean concentration of ozone



TRL 26 CPR1094 (II)

Figure 2.2: M4 (Theale 2) running 8-hour mean concentration of ozone

February 2009

Figure 2.3: M4 (Theale 2) running 8-hour mean concentration of ozone March

2009

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - February 2009Running 8-hour mean concentration of ozone


0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - March 2009Running 8-hour mean concentration of ozone


Valid: low NOx concentrations observed


TRL 27 CPR1094 (II)

Figure 2.4: M4 (Theale 2) running 8-hour mean concentration of ozone April

2009

Figure 2.5: M4 (Theale 2) running 8-hour mean concentration of ozone May

2009

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Co

nce

ntr

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n (

µg/

m3)

Date

M4 (Theale 2) - April 2009Running 8-hour mean concentration of ozone



0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - May 2009Running 8-hour mean concentration of ozone




TRL 28 CPR1094 (II)

Figure 2.6: M4 (Theale 2) running 8-hour mean concentration of ozone June

2009

Figure 2.7: M4 (Theale 2) running 8-hour mean concentration of ozone July

2009

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30

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - June 2009Running 8-hour mean concentration of ozone

UK Air Quality objective: 100 µg/m3Valid: low NOx concentrations observed

0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - July 2009Running 8-hour mean concentration of ozone




TRL 29 CPR1094 (II)

Figure 2.8: M4 (Theale 2) running 8-hour mean concentration of ozone August

2009


September 2009

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31

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - August 2009Running 8-hour mean concentration of ozone


0

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30

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - September 2009Running 8-hour mean concentration of ozone


Valid: high NOx concentrations observed



TRL 30 CPR1094 (II)


October 2009


November 2009

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31

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - October 2009Running 8-hour mean concentration of ozone



0

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01

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30

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - November 2009Running 8-hour mean concentration of ozone



TRL 31 CPR1094 (II)


December 2009

0

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31

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - December 2009Running 8-hour mean concentration of ozone




TRL 32 CPR1094 (II)



January 2009

0

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31

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - January 2009Running 8-hour mean concentration of ozone



TRL 33 CPR1094 (II)


February 2009


March 2009

0

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - February 2009Running 8-hour mean concentration of ozone


0

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120

01

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - March 2009Running 8-hour mean concentration of ozone



TRL 34 CPR1094 (II)


April 2009


May 2009

0

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120

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Co

nce

ntr

atio

n (

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m3)

Date

Bell Common Tunnel - April 2009Running 8-hour mean concentration of ozone


0

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01

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Co

nce

ntr

atio

n (

µg/

m3)

Date

Bell Common Tunnel - May 2009Running 8-hour mean concentration of ozone



TRL 35 CPR1094 (II)


June 2009


July 2009

0

20

40

60

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Bell Common Tunnel - June 2009Running 8-hour mean concentration of ozone


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Co

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Date

Bell Common Tunnel - July 2009Running 8-hour mean concentration of ozone


Instrument fault


TRL 36 CPR1094 (II)


August 2009


September 2009

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Co

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Date

Bell Common Tunnel - August 2009Running 8-hour mean concentration of ozone

UK Air Quality objective:100 µg/m3

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Co

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Date

Bell Common Tunnel - September 2009Running 8-hour mean concentration of ozone




TRL 37 CPR1094 (II)

2.3 M25 (B)

Figure 2.22: M25 (B) running 8-hour mean concentration of ozone January

2009

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Co

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Date

M25 (B) - January 2009Running 8-hour mean concentration of ozone


Power failureValid: low NOx concentrations observed



TRL 38 CPR1094 (II)

Figure 2.23: M25 (B) running 8-hour mean concentration of ozone February

2009

Figure 2.24: M25 (B) running 8-hour mean concentration of ozone March 2009

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Co

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Date

M25 (B) - February 2009Running 8-hour mean concentration of ozone



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Co

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Date

M25 (B) - March 2009Running 8-hour mean concentration of ozone


Valid: low NOx concentrations observedValid: low NOx concentrations observed


TRL 39 CPR1094 (II)

Figure 2.25: M25 (B) running 8-hour mean concentration of ozone April 2009

Figure 2.26: M25 (B) running 8-hour mean concentration of ozone May 2009

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Co

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Date

M25 (B) - April 2009Running 8-hour mean concentration of ozone


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Co

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Date

M25 (B) - May 2009Running 8-hour mean concentration of ozone



TRL 40 CPR1094 (II)

Figure 2.27: M25 (B) running 8-hour mean concentration of ozone June 2009

Figure 2.28: M25 (B) running 8-hour mean concentration of ozone July 2009

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Co

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Date

M25 (B) - June 2009Running 8-hour mean concentration of ozone

UK Air Quality objective: 100 µg/m3 Valid: low NOx concentrations observed

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Co

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Date

M25 (B) - July 2009Running 8-hour mean concentration of ozone




TRL 41 CPR1094 (II)

Figure 2.29: M25 (B) running 8-hour mean concentration of ozone August 2009

Figure 2.30: M25 (B) running 8-hour mean concentration of ozone September

2009

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Co

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Date

M25 (B) - August 2009Running 8-hour mean concentration of ozone

UK Air Quality objective:100 µg/m3

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Co

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Date

M25 (B) - September 2009Running 8-hour mean concentration of ozone





TRL 42 CPR1094 (II)

Figure 2.31: M25 (B) running 8-hour mean concentration of ozone October

2009

Figure 2.32: M25 (B) running 8-hour mean concentration of ozone November

2009

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Co

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Date

M25 (B) - October 2009Running 8-hour mean concentration of ozone


Valid: low NOx concentrations observedValid: low NOx concentrations observed

Valid: high NOx concentrations observedValid: high NOx concentrations observed

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Co

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Date

M25 (B) - November 2009Running 8-hour mean concentration of ozone


Power failure

Power failure



TRL 43 CPR1094 (II)

Figure 2.33: M25 (B) running 8-hour mean concentration of ozone December

2009

2.4 M60

Figure 2.34: M60 running 8-hour mean concentration of ozone January 2009

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M25 (B) - December 2009Running 8-hour mean concentration of ozone


Power failure Power failure



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M60 - January 2009Running 8-hour mean concentration of ozone


Power failureValid: high NOx concentrations observed


TRL 44 CPR1094 (II)

Figure 2.35: M60 running 8-hour mean concentration of ozone February 2009

Figure 2.36: M60 running 8-hour mean concentration of ozone March 2009

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M60 - February 2009Running 8-hour mean concentration of ozone


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M60 - March 2009Running 8-hour mean concentration of ozone



TRL 45 CPR1094 (II)

Figure 2.37: M60 running 8-hour mean concentration of ozone April 2009

Figure 2.38: M60 running 8-hour mean concentration of ozone May 2009

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M60 - April 2009Running 8-hour mean concentration of ozone



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M60 - May 2009Running 8-hour mean concentration of ozone



TRL 46 CPR1094 (II)

Figure 2.39: M60 running 8-hour mean concentration of ozone June 2009

Figure 2.40: M60 running 8-hour mean concentration of ozone July 2009

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M60 - June 2009Running 8-hour mean concentration of ozone



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M60 - July 2009Running 8-hour mean concentration of ozone




TRL 47 CPR1094 (II)

Figure 2.41: M60 running 8-hour mean concentration of ozone August 2009

Figure 2.42: M60 running 8-hour mean concentration of ozone September 2009

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M60 - August 2009Running 8-hour mean concentration of ozone


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M60 - September 2009Running 8-hour mean concentration of ozone



TRL 48 CPR1094 (II)

Figure 2.43: M60 running 8-hour mean concentration of ozone October 2009

Figure 2.44: M60 running 8-hour mean concentration of ozone November 2009

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M60 - October 2009Running 8-hour mean concentration of ozone


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M60 - November 2009Running 8-hour mean concentration of ozone




TRL 49 CPR1094 (II)

Figure 2.45: M60 running 8-hour mean concentration of ozone December 2009

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M60 - December 2009Running 8-hour mean concentration of ozone





TRL 50 CPR1094 (II)

3 Sulphur dioxide

3.1 15-minute mean

3.1.1 M25 (B)

Figure 3.1: M25 (B) 15-minute mean concentration of sulphur dioxide January

2009

014284256708498

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M25(B) - January 200915-minute mean concentration of sulphur dioxide


Power failure


TRL 51 CPR1094 (II)

Figure 3.2: M25 (B) 15-minute mean concentration of sulphur dioxide February

2009

Figure 3.3: M25 (B) 15-minute mean concentration of sulphur dioxide March

2009

014284256708498

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Date

M25 (B) - February 200915-minute mean concentration of sulphur dioxide


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M25 (B) - March 200915-minute mean concentration of sulphur dioxide



TRL 52 CPR1094 (II)

Figure 3.4: M25 (B) 15-minute mean concentration of sulphur dioxide April

2009

Figure 3.5: M25 (B) 15-minute mean concentration of sulphur dioxide May 2009

014284256708498

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Date

M25 (B) - April 200915-minute mean concentration of sulphur dioxide


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Co

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Date

M25 (B) - May 200915-minute mean concentration of sulphur dioxide



TRL 53 CPR1094 (II)

Figure 3.6: M25 (B) 15-minute mean concentration of sulphur dioxide June

2009

Figure 3.7: M25 (B) 15-minute mean concentration of sulphur dioxide July 2009

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Date

M25 (B) - June 200915-minute mean concentration of sulphur dioxide


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Co

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Date

M25 (B) - July 200915-minute mean concentration of sulphur dioxide



TRL 54 CPR1094 (II)

Figure 3.8: M25 (B) 15-minute mean concentration of sulphur dioxide August

2009

Figure 3.9: M25 (B) 15-minute mean concentration of sulphur dioxide

September 2009

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Co

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)

Date

M25 (B) - August 200915-minute mean concentration of sulphur dioxide


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Date

M25 (B) - September 200915-minute mean concentration of sulphur dioxide



TRL 55 CPR1094 (II)

Figure 3.10: M25 (B) 15-minute mean concentration of sulphur dioxide October

2009


November 2009

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Co

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Date

M25 (B) - October 200915-minute mean concentration of sulphur dioxide


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Date

M25 (B) - November 200915-minute mean concentration of sulphur dioxide




TRL 56 CPR1094 (II)


December 2009

3.1.2 M60

Figure 3.13: M60 15-minute mean concentration of sulphur dioxide January

2009

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Date

M25 (B) - December 200915-minute mean concentration of sulphur dioxide



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Co

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Date

M60 - January 200915-minute mean concentration of sulphur dioxide


Instrument faulltPower failure


TRL 57 CPR1094 (II)

Figure 3.14: M60 15-minute mean concentration of sulphur dioxide February

2009

Figure 3.15: M60 15-minute mean concentration of sulphur dioxide March 2009

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Date

M60 - February 200915-minute mean concentration of sulphur dioxide



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Co

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Date

M60 - March 200915-minute mean concentration of sulphur dioxide



TRL 58 CPR1094 (II)

Figure 3.16: M60 15-minute mean concentration of sulphur dioxide April 2009

Figure 3.17: M60 15-minute mean concentration of sulphur dioxide May 2009

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Co

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Date

M60 - April 200915-minute mean concentration of sulphur dioxide


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Co

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Date

M60 - May 200915-minute mean concentration of sulphur dioxide



TRL 59 CPR1094 (II)

Figure 3.18: M60 15-minute mean concentration of sulphur dioxide June 2009

Figure 3.19: M60 15-minute mean concentration of sulphur dioxide July 2009

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Co

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Date

M60 - June 200915-minute mean concentration of sulphur dioxide


Instrument fault

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Co

nce

ntr

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n (

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m3)

Date

M60 - July 200915-minute mean concentration of sulphur dioxide



TRL 60 CPR1094 (II)

Figure 3.20: M60 15-minute mean concentration of sulphur dioxide August

2009

Figure 3.21: M60 15-minute mean concentration of sulphur dioxide September

2009

014284256708498

112126140154168182196210224238252266280294308

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Co

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n (

µg/

m3)

Date

M60 - August 200915-minute mean concentration of sulphur dioxide


Instrument fault

014284256708498

112126140154168182196210224238252266280294308

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Co

nce

ntr

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n (

g/m

3)

Date

M60 - September 200915-minute mean concentration of sulphur dioxide


Instrument fault



TRL 61 CPR1094 (II)

Figure 3.22: M60 15-minute mean concentration of sulphur dioxide October

2009

Figure 3.23: M60 15-minute mean concentration of sulphur dioxide November

2009

014284256708498

112126140154168182196210224238252266280294308

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Co

nce

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n (

g/m

3)

Date

M60 - October 200915-minute mean concentration of sulphur dioxide


Instrument fault

014284256708498

112126140154168182196210224238252266280294308

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Co

nce

ntr

atio

n (

g/m

3)

Date

M60 - November 200915-minute mean concentration of sulphur dioxide



TRL 62 CPR1094 (II)

Figure 3.24: M60 15-minute mean concentration of sulphur dioxide December

2009

3.2 1-hour mean

3.2.1 M25 (B)

Figure 3.25: M25 (B) 1-hour mean concentration of sulphur dioxide January

2009

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Co

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n (

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Date

M25 (B) - January 20091-hour mean concentration of sulphur dioxide


Power failure


TRL 63 CPR1094 (II)

Figure 3.26: M25 (B) 1-hour mean concentration of sulphur dioxide February

2009

Figure 3.27: M25 (B) 1-hour mean concentration of sulphur dioxide March 2009

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Co

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Date

M25 (B) - February 20091-hour mean concentration of sulphur dioxide


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Co

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n (

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Date

M25 (B) - March 20091-hour mean concentration of sulphur dioxide



TRL 64 CPR1094 (II)

Figure 3.28: M25 (B) 1-hour mean concentration of sulphur dioxide April 2009

Figure 3.29: M25 (B) 1-hour mean concentration of sulphur dioxide May 2009

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Co

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m3)

Date

M25 (B) - April 20091-hour mean concentration of sulphur dioxide


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Co

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n (

µg/

m3)

Date

M25 (B) - May 20091-hour mean concentration of sulphur dioxide



TRL 65 CPR1094 (II)

Figure 3.30: M25 (B) 1-hour mean concentration of sulphur dioxide June 2009

Figure 3.31: M25 (B) 1-hour mean concentration of sulphur dioxide July 2009

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Co

nce

ntr

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n (

µg/

m3)

Date

M25 (B) - June 20091-hour mean concentration of sulphur dioxide


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Co

nce

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n (

µg/

m3)

Date

M25 (B) - July 20091-hour mean concentration of sulphur dioxide



TRL 66 CPR1094 (II)

Figure 3.32: M25 (B) 1-hour mean concentration of sulphur dioxide August

2009

Figure 3.33: M25 (B) 1-hour mean concentration of sulphur dioxide September

2009

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Co

nce

ntr

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n (

µg/

m3)

Date

M25 (B) - August 20091-hour mean concentration of sulphur dioxide


0

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Co

nce

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Date

M25 (B) - September 20091-hour mean concentration of sulphur dioxide



TRL 67 CPR1094 (II)

Figure 3.34: M25 (B) 1-hour mean concentration of sulphur dioxide October

2009

Figure 3.35: M25 (B) 1-hour mean concentration of sulphur dioxide November

2009

0

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Co

nce

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n (

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m3)

Date

M25 (B) - October 20091-hour mean concentration of sulphur dioxide


0

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Co

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Date

M25 (B) - November 20091-hour mean concentration of sulphur dioxide




TRL 68 CPR1094 (II)

Figure 3.36: M25 (B) 1-hour mean concentration of sulphur dioxide December

2009

3.2.2 M60

Figure 3.37: M60 1-hour mean concentration of sulphur dioxide January 2009

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Co

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Date

M25 (B) - December 20091-hour mean concentration of sulphurdioxide



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Co

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Date

M60 - January 20091-hour mean concentration of sulphur dioxide


Power failureInstrument fault


TRL 69 CPR1094 (II)

Figure 3.38: M60 1-hour mean concentration of sulphur dioxide February 2009

Figure 3.39: M60 1-hour mean concentration of sulphur dioxide March 2009

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Co

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Date

M60 - February 20091-hour mean concentration of sulphur dioxide



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Co

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Date

M60 - March 20091-hour mean concentration of sulphur dioxide




TRL 70 CPR1094 (II)

Figure 3.40: M60 1-hour mean concentration of sulphur dioxide April 2009

Figure 3.41: M60 1-hour mean concentration of sulphur dioxide May 2009

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Co

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Date

M60 - April 20091-hour mean concentration of sulphur dioxide



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Co

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Date

M60 - May 20091-hour mean concentration of sulphur dioxide



TRL 71 CPR1094 (II)

Figure 3.42: M60 1-hour mean concentration of sulphur dioxide June 2009

Figure 3.43: M60 1-hour mean concentration of sulphur dioxide July 2009

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Co

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Date

M60 - June 20091-hour mean concentration of sulphur dioxide


Instrument faultSpan and zero calibration

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Co

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Date

M60 - July 20091-hour mean concentration of sulphur dioxide



TRL 72 CPR1094 (II)

Figure 3.44: M60 1-hour mean concentration of sulphur dioxide August 2009

Figure 3.45: M60 1-hour mean concentration of sulphur dioxide September

2009

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Co

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Date

M60 - August 20091-hour mean concentration of sulphur dioxide


Instrument fault

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Co

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Date

M60 - September 20091-hour mean concentration of sulphur dioxide


Instrument faultSpan and zero calibration


TRL 73 CPR1094 (II)

Figure 3.46: M60 1-hour mean concentration of sulphur dioxide October 2009

Figure 3.47: M60 1-hour mean concentration of sulphur dioxide November 2009

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Co

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Date

M60 - October 20091-hour mean concentration of sulphur dioxide


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Co

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Date

M60 - November 20091-hour mean concentration of sulphur dioxide



TRL 74 CPR1094 (II)

Figure 3.48: M60 1-hour mean concentration of sulphur dioxide December 2009

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Co

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Date

M60 - December 20091-hour mean concentration of sulphurdioxide



TRL 75 CPR1094 (II)

3.3 24-hour mean

3.3.1 M25 (B)

Figure 3.49: M25 (B) 24-hour mean concentration of sulphur dioxide January

2009

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Co

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M25 (B) - January 200924-hour mean concentration of sulphur dioxide


Power failure


TRL 76 CPR1094 (II)

Figure 3.50: M25 (B) 24-hour mean concentration of sulphur dioxide February

2009

Figure 3.51: M25 (B) 24-hour mean concentration of sulphur dioxide March

2009

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Co

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Date

M25 (B) - February 200924-hour mean concentration of sulphur dioxide


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Co

nce

ntr

atio

n (

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Date

M25 (B) - March 200924-hour mean concentration of sulphur dioxide



TRL 77 CPR1094 (II)

Figure 3.52: M25 (B) 24-hour mean concentration of sulphur dioxide April 2009

Figure 3.53: M25 (B) 24-hour mean concentration of sulphur dioxide May 2009

0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - April 200924-hour mean concentration of sulphur dioxide


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Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - May 200924-hour mean concentration of sulphur dioxide



TRL 78 CPR1094 (II)

Figure 3.54: M25 (B) 24-hour mean concentration of sulphur dioxide June 2009

Figure 3.55: M25 (B) 24-hour mean concentration of sulphur dioxide July 2009

0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - June 200924-hour mean concentration of sulphur dioxide


0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - July 200924-hour mean concentration of sulphur dioxide



TRL 79 CPR1094 (II)

Figure 3.56: M25 (B) 24-hour mean concentration of sulphur dioxide August

2009

Figure 3.57: M25 (B) 24-hour mean concentration of sulphur dioxide September

2009

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - August 200924-hour mean concentration of sulphur dioxide


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Co

nce

ntr

atio

n (

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Date

M25 (B) - September 200924-hour mean concentration of sulphur dioxide



TRL 80 CPR1094 (II)

Figure 3.58: M25 (B) 24-hour mean concentration of sulphur dioxide October

2009

Figure 3.59: M25 (B) 24-hour mean concentration of sulphur dioxide November

2009

0

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Co

nce

ntr

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n (

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m3)

Date

M25 (B) - October 200924-hour mean concentration of sulphur dioxide


0

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Co

nce

ntr

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n (

µg/

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Date

M25 (B) - November 200924-hour mean concentration of sulphur dioxide


Power failure


TRL 81 CPR1094 (II)

Figure 3.60: M25 (B) 24-hour mean concentration of sulphur dioxide December

2009

3.3.2 M60

Figure 3.61: M60 24-hour mean concentration of sulphur dioxide January 2009

0

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Co

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ntr

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n (

µg/

m3)

Date

M25 (B) - December 200924-hour mean concentration of sulphur dioxide


Power failure

0

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Co

nce

ntr

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n (

µg/

m3)

Date

M60 - January 200924-hour mean concentration of sulphur dioxide


Power failure


TRL 82 CPR1094 (II)

Figure 3.62: M60 24-hour mean concentration of sulphur dioxide February 2009

Figure 3.63: M60 24-hour mean concentration of sulphur dioxide March 2009

0

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Co

nce

ntr

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n (

µg/

m3)

Date

M60 - February 200924-hour mean concentration of sulphur dioxide


0

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Co

nce

ntr

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n (

µg/

m3)

Date

M60 - March 200924-hour mean concentration of sulphur dioxide



TRL 83 CPR1094 (II)

Figure 3.64: M60 24-hour mean concentration of sulphur dioxide April 2009

Figure 3.65: M60 24-hour mean concentration of sulphur dioxide May 2009

0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M60 - April 200924-hour mean concentration of sulphur dioxide


0

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Co

nce

ntr

atio

n (

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m3)

Date

M60 - May 200924-hour mean concentration of sulphur dioxide



TRL 84 CPR1094 (II)

Figure 3.66: M60 24-hour mean concentration of sulphur dioxide June 2009

Figure 3.67: M60 24-hour mean concentration of sulphur dioxide July 2009

0

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Co

nce

ntr

atio

n (

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m3)

Date

M60 - June 200924-hour mean concentration of sulphur dioxide


Instrument fault

0

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31

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M60 - July 200924-hour mean concentration of sulphur dioxide



TRL 85 CPR1094 (II)

Figure 3.68: M60 24-hour mean concentration of sulphur dioxide August 2009

Figure 3.69: M60 24-hour mean concentration of sulphur dioxide September

2009

0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M60 - August 200924-hour mean concentration of sulphur dioxide


Instrument fault

0

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M60 - September 200924-hour mean concentration of sulphur dioxide


Instrument fault


TRL 86 CPR1094 (II)

Figure 3.70: M60 24-hour mean concentration of sulphur dioxide October 2009

Figure 3.71: M60 24-hour mean concentration of sulphur dioxide November

2009

0

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31

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M60 - October 200924-hour mean concentration of sulphur dioxide


0

25

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30

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M60 - November 200924-hour mean concentration of sulphur dioxide



TRL 87 CPR1094 (II)

Figure 3.72: M60 24-hour mean concentration of sulphur dioxide December

2009

0

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M60 - December 200924-hour mean concentration of sulphur dioxide



TRL 88 CPR1094 (II)

4 Carbon monoxide

4.1 M4 (Theale 2)

Figure 4.1: M4 (Theale 2) running 8-hour mean concentration of carbon

monoxide January 2009

0

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31

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - January 2009Running 8-hour mean concentration of carbon dioxide

UK Air Quality objective: 10 mg/m3

Instrument fault - removed from site for repairInstrument re-installed


TRL 89 CPR1094 (II)


monoxide February 2009


monoxide March 2009

0

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28

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - February 2009Running 8-hour mean concentration of carbon dioxide


0

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6

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31

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - March 2009Running 8-hour mean concentration of carbon dioxide



TRL 90 CPR1094 (II)


monoxide April 2009


monoxide May 2009

0

1

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Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - April 2009Running 8-hour mean concentration of carbon dioxide


0

1

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6

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8

9

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12

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29

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30

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09

31

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - May 2009Running 8-hour mean concentration of carbon dioxide



TRL 91 CPR1094 (II)


monoxide June 2009


monoxide July 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

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28

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09

29

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09

30

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - June 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

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09

02

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29

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30

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09

31

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - July 2009Running 8-hour mean concentration of carbon dioxide


Instrument fault


TRL 92 CPR1094 (II)


monoxide August 2009


monoxide September 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

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02

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28

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29

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30

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09

31

/08

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - August 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/09

/20

09

02

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29

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09

30

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - September 2009Running 8-hour mean concentration of carbon dioxide



TRL 93 CPR1094 (II)


monoxide October 2009


monoxide November 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

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09

02

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09

03

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09

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05

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09

06

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/10

/20

09

14

/10

/20

09

15

/10

/20

09

16

/10

/20

09

17

/10

/20

09

18

/10

/20

09

19

/10

/20

09

20

/10

/20

09

21

/10

/20

09

22

/10

/20

09

23

/10

/20

09

24

/10

/20

09

25

/10

/20

09

26

/10

/20

09

27

/10

/20

09

28

/10

/20

09

29

/10

/20

09

30

/10

/20

09

31

/10

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - October 2009Running 8-hour mean concentration of carbon dioxide


Instrument fault

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/11

/20

09

02

/11

/20

09

03

/11

/20

09

04

/11

/20

09

05

/11

/20

09

06

/11

/20

09

07

/11

/20

09

08

/11

/20

09

09

/11

/20

09

10

/11

/20

09

11

/11

/20

09

12

/11

/20

09

13

/11

/20

09

14

/11

/20

09

15

/11

/20

09

16

/11

/20

09

17

/11

/20

09

18

/11

/20

09

19

/11

/20

09

20

/11

/20

09

21

/11

/20

09

22

/11

/20

09

23

/11

/20

09

24

/11

/20

09

25

/11

/20

09

26

/11

/20

09

27

/11

/20

09

28

/11

/20

09

29

/11

/20

09

30

/11

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - November 2009Running 8-hour mean concentration of carbon dioxide



TRL 94 CPR1094 (II)


monoxide December 2009



monoxide January 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/12

/20

09

02

/12

/20

09

03

/12

/20

09

04

/12

/20

09

05

/12

/20

09

06

/12

/20

09

07

/12

/20

09

08

/12

/20

09

09

/12

/20

09

10

/12

/20

09

11

/12

/20

09

12

/12

/20

09

13

/12

/20

09

14

/12

/20

09

15

/12

/20

09

16

/12

/20

09

17

/12

/20

09

18

/12

/20

09

19

/12

/20

09

20

/12

/20

09

21

/12

/20

09

22

/12

/20

09

23

/12

/20

09

24

/12

/20

09

25

/12

/20

09

26

/12

/20

09

27

/12

/20

09

28

/12

/20

09

29

/12

/20

09

30

/12

/20

09

31

/12

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M4 (Theale 2) - December 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/01

/20

09

02

/01

/20

09

03

/01

/20

09

04

/01

/20

09

05

/01

/20

09

06

/01

/20

09

07

/01

/20

09

08

/01

/20

09

09

/01

/20

09

10

/01

/20

09

11

/01

/20

09

12

/01

/20

09

13

/01

/20

09

14

/01

/20

09

15

/01

/20

09

16

/01

/20

09

17

/01

/20

09

18

/01

/20

09

19

/01

/20

09

20

/01

/20

09

21

/01

/20

09

22

/01

/20

09

23

/01

/20

09

24

/01

/20

09

25

/01

/20

09

26

/01

/20

09

27

/01

/20

09

28

/01

/20

09

29

/01

/20

09

30

/01

/20

09

31

/01

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - January 2009Running 8-hour mean concentration of carbon dioxide



TRL 95 CPR1094 (II)


monoxide February 2009


monoxide March 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/02

/20

09

02

/02

/20

09

03

/02

/20

09

04

/02

/20

09

05

/02

/20

09

06

/02

/20

09

07

/02

/20

09

08

/02

/20

09

09

/02

/20

09

10

/02

/20

09

11

/02

/20

09

12

/02

/20

09

13

/02

/20

09

14

/02

/20

09

15

/02

/20

09

16

/02

/20

09

17

/02

/20

09

18

/02

/20

09

19

/02

/20

09

20

/02

/20

09

21

/02

/20

09

22

/02

/20

09

23

/02

/20

09

24

/02

/20

09

25

/02

/20

09

26

/02

/20

09

27

/02

/20

09

28

/02

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - February 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/03

/20

09

02

/03

/20

09

03

/03

/20

09

04

/03

/20

09

05

/03

/20

09

06

/03

/20

09

07

/03

/20

09

08

/03

/20

09

09

/03

/20

09

10

/03

/20

09

11

/03

/20

09

12

/03

/20

09

13

/03

/20

09

14

/03

/20

09

15

/03

/20

09

16

/03

/20

09

17

/03

/20

09

18

/03

/20

09

19

/03

/20

09

20

/03

/20

09

21

/03

/20

09

22

/03

/20

09

23

/03

/20

09

24

/03

/20

09

25

/03

/20

09

26

/03

/20

09

27

/03

/20

09

28

/03

/20

09

29

/03

/20

09

30

/03

/20

09

31

/03

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - March 2009Running 8-hour mean concentration of carbon dioxide


Instrument faultRemoved from site for repair


TRL 96 CPR1094 (II)


monoxide April 2009


monoxide May 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/04

/20

09

02

/04

/20

09

03

/04

/20

09

04

/04

/20

09

05

/04

/20

09

06

/04

/20

09

07

/04

/20

09

08

/04

/20

09

09

/04

/20

09

10

/04

/20

09

11

/04

/20

09

12

/04

/20

09

13

/04

/20

09

14

/04

/20

09

15

/04

/20

09

16

/04

/20

09

17

/04

/20

09

18

/04

/20

09

19

/04

/20

09

20

/04

/20

09

21

/04

/20

09

22

/04

/20

09

23

/04

/20

09

24

/04

/20

09

25

/04

/20

09

26

/04

/20

09

27

/04

/20

09

28

/04

/20

09

29

/04

/20

09

30

/04

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - April 2009Running 8-hour mean concentration of carbon dioxide


Instrument faultInstrument re-installed

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/05

/20

09

02

/05

/20

09

03

/05

/20

09

04

/05

/20

09

05

/05

/20

09

06

/05

/20

09

07

/05

/20

09

08

/05

/20

09

09

/05

/20

09

10

/05

/20

09

11

/05

/20

09

12

/05

/20

09

13

/05

/20

09

14

/05

/20

09

15

/05

/20

09

16

/05

/20

09

17

/05

/20

09

18

/05

/20

09

19

/05

/20

09

20

/05

/20

09

21

/05

/20

09

22

/05

/20

09

23

/05

/20

09

24

/05

/20

09

25

/05

/20

09

26

/05

/20

09

27

/05

/20

09

28

/05

/20

09

29

/05

/20

09

30

/05

/20

09

31

/05

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - May 2009Running 8-hour mean concentration of carbon dioxide


Instrument faultRemoved from site for repair


TRL 97 CPR1094 (II)


monoxide June 2009


monoxide July 2009

0

1

01

/06

/20

09

02

/06

/20

09

03

/06

/20

09

04

/06

/20

09

05

/06

/20

09

06

/06

/20

09

07

/06

/20

09

08

/06

/20

09

09

/06

/20

09

10

/06

/20

09

11

/06

/20

09

12

/06

/20

09

13

/06

/20

09

14

/06

/20

09

15

/06

/20

09

16

/06

/20

09

17

/06

/20

09

18

/06

/20

09

19

/06

/20

09

20

/06

/20

09

21

/06

/20

09

22

/06

/20

09

23

/06

/20

09

24

/06

/20

09

25

/06

/20

09

26

/06

/20

09

27

/06

/20

09

28

/06

/20

09

29

/06

/20

09

30

/06

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - June 2009Running 8-hour mean concentration of carbon dioxide



0

1

01

/07

/20

09

02

/07

/20

09

03

/07

/20

09

04

/07

/20

09

05

/07

/20

09

06

/07

/20

09

07

/07

/20

09

08

/07

/20

09

09

/07

/20

09

10

/07

/20

09

11

/07

/20

09

12

/07

/20

09

13

/07

/20

09

14

/07

/20

09

15

/07

/20

09

16

/07

/20

09

17

/07

/20

09

18

/07

/20

09

19

/07

/20

09

20

/07

/20

09

21

/07

/20

09

22

/07

/20

09

23

/07

/20

09

24

/07

/20

09

25

/07

/20

09

26

/07

/20

09

27

/07

/20

09

28

/07

/20

09

29

/07

/20

09

30

/07

/20

09

31

/07

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - July 2009Running 8-hour mean concentration of carbon dioxide




TRL 98 CPR1094 (II)


monoxide August 2009


monoxide September 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/08

/20

09

02

/08

/20

09

03

/08

/20

09

04

/08

/20

09

05

/08

/20

09

06

/08

/20

09

07

/08

/20

09

08

/08

/20

09

09

/08

/20

09

10

/08

/20

09

11

/08

/20

09

12

/08

/20

09

13

/08

/20

09

14

/08

/20

09

15

/08

/20

09

16

/08

/20

09

17

/08

/20

09

18

/08

/20

09

19

/08

/20

09

20

/08

/20

09

21

/08

/20

09

22

/08

/20

09

23

/08

/20

09

24

/08

/20

09

25

/08

/20

09

26

/08

/20

09

27

/08

/20

09

28

/08

/20

09

29

/08

/20

09

30

/08

/20

09

31

/08

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - August 2009Running 8-hour mean concentration of carbon dioxide


Instrument re-installed

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/09

/20

09

02

/09

/20

09

03

/09

/20

09

04

/09

/20

09

05

/09

/20

09

06

/09

/20

09

07

/09

/20

09

08

/09

/20

09

09

/09

/20

09

10

/09

/20

09

11

/09

/20

09

12

/09

/20

09

13

/09

/20

09

14

/09

/20

09

15

/09

/20

09

16

/09

/20

09

17

/09

/20

09

18

/09

/20

09

19

/09

/20

09

20

/09

/20

09

21

/09

/20

09

22

/09

/20

09

23

/09

/20

09

24

/09

/20

09

25

/09

/20

09

26

/09

/20

09

27

/09

/20

09

28

/09

/20

09

29

/09

/20

09

30

/09

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

Bell Common Tunnel - September 2009Running 8-hour mean concentration of carbon dioxide



TRL 99 CPR1094 (II)

4.3 M25 (B)

Figure 4.22: M25 (B) running 8-hour mean concentration of carbon monoxide

January 2009


February 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/01

/20

09

02

/01

/20

09

03

/01

/20

09

04

/01

/20

09

05

/01

/20

09

06

/01

/20

09

07

/01

/20

09

08

/01

/20

09

09

/01

/20

09

10

/01

/20

09

11

/01

/20

09

12

/01

/20

09

13

/01

/20

09

14

/01

/20

09

15

/01

/20

09

16

/01

/20

09

17

/01

/20

09

18

/01

/20

09

19

/01

/20

09

20

/01

/20

09

21

/01

/20

09

22

/01

/20

09

23

/01

/20

09

24

/01

/20

09

25

/01

/20

09

26

/01

/20

09

27

/01

/20

09

28

/01

/20

09

29

/01

/20

09

30

/01

/20

09

31

/01

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - January 2009Running 8-hour mean concentration of carbon dioxide


Power failure

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/02

/20

09

02

/02

/20

09

03

/02

/20

09

04

/02

/20

09

05

/02

/20

09

06

/02

/20

09

07

/02

/20

09

08

/02

/20

09

09

/02

/20

09

10

/02

/20

09

11

/02

/20

09

12

/02

/20

09

13

/02

/20

09

14

/02

/20

09

15

/02

/20

09

16

/02

/20

09

17

/02

/20

09

18

/02

/20

09

19

/02

/20

09

20

/02

/20

09

21

/02

/20

09

22

/02

/20

09

23

/02

/20

09

24

/02

/20

09

25

/02

/20

09

26

/02

/20

09

27

/02

/20

09

28

/02

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - February 2009Running 8-hour mean concentration of carbon dioxide



TRL 100 CPR1094 (II)


March 2009


April 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/03

/20

09

02

/03

/20

09

03

/03

/20

09

04

/03

/20

09

05

/03

/20

09

06

/03

/20

09

07

/03

/20

09

08

/03

/20

09

09

/03

/20

09

10

/03

/20

09

11

/03

/20

09

12

/03

/20

09

13

/03

/20

09

14

/03

/20

09

15

/03

/20

09

16

/03

/20

09

17

/03

/20

09

18

/03

/20

09

19

/03

/20

09

20

/03

/20

09

21

/03

/20

09

22

/03

/20

09

23

/03

/20

09

24

/03

/20

09

25

/03

/20

09

26

/03

/20

09

27

/03

/20

09

28

/03

/20

09

29

/03

/20

09

30

/03

/20

09

31

/03

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - March 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/04

/20

09

02

/04

/20

09

03

/04

/20

09

04

/04

/20

09

05

/04

/20

09

06

/04

/20

09

07

/04

/20

09

08

/04

/20

09

09

/04

/20

09

10

/04

/20

09

11

/04

/20

09

12

/04

/20

09

13

/04

/20

09

14

/04

/20

09

15

/04

/20

09

16

/04

/20

09

17

/04

/20

09

18

/04

/20

09

19

/04

/20

09

20

/04

/20

09

21

/04

/20

09

22

/04

/20

09

23

/04

/20

09

24

/04

/20

09

25

/04

/20

09

26

/04

/20

09

27

/04

/20

09

28

/04

/20

09

29

/04

/20

09

30

/04

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - April 2009Running 8-hour mean concentration of carbon dioxide





May 2009


June 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/05

/20

09

02

/05

/20

09

03

/05

/20

09

04

/05

/20

09

05

/05

/20

09

06

/05

/20

09

07

/05

/20

09

08

/05

/20

09

09

/05

/20

09

10

/05

/20

09

11

/05

/20

09

12

/05

/20

09

13

/05

/20

09

14

/05

/20

09

15

/05

/20

09

16

/05

/20

09

17

/05

/20

09

18

/05

/20

09

19

/05

/20

09

20

/05

/20

09

21

/05

/20

09

22

/05

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09

23

/05

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09

24

/05

/20

09

25

/05

/20

09

26

/05

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09

27

/05

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09

28

/05

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09

29

/05

/20

09

30

/05

/20

09

31

/05

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - May 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/06

/20

09

02

/06

/20

09

03

/06

/20

09

04

/06

/20

09

05

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09

06

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/20

09

07

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09

08

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09

09

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09

10

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09

11

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09

12

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09

13

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09

14

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09

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09

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09

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09

18

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09

19

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09

20

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09

21

/06

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09

22

/06

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09

23

/06

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09

24

/06

/20

09

25

/06

/20

09

26

/06

/20

09

27

/06

/20

09

28

/06

/20

09

29

/06

/20

09

30

/06

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - June 2009Running 8-hour mean concentration of carbon dioxide





July 2009


August 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/07

/20

09

02

/07

/20

09

03

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09

04

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09

05

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09

06

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09

07

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09

08

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09

10

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09

11

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09

12

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09

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09

14

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09

15

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09

16

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09

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09

18

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09

19

/07

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09

20

/07

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09

21

/07

/20

09

22

/07

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09

23

/07

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09

24

/07

/20

09

25

/07

/20

09

26

/07

/20

09

27

/07

/20

09

28

/07

/20

09

29

/07

/20

09

30

/07

/20

09

31

/07

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - July 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/08

/20

09

02

/08

/20

09

03

/08

/20

09

04

/08

/20

09

05

/08

/20

09

06

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09

07

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09

08

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09

09

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09

10

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09

11

/08

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09

12

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09

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09

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09

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09

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09

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09

18

/08

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09

19

/08

/20

09

20

/08

/20

09

21

/08

/20

09

22

/08

/20

09

23

/08

/20

09

24

/08

/20

09

25

/08

/20

09

26

/08

/20

09

27

/08

/20

09

28

/08

/20

09

29

/08

/20

09

30

/08

/20

09

31

/08

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - August 2009Running 8-hour mean concentration of carbon dioxide





September 2009


October 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/09

/20

09

02

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23

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24

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25

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09

26

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09

27

/09

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09

28

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/20

09

29

/09

/20

09

30

/09

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - September 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/10

/20

09

02

/10

/20

09

03

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09

04

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09

05

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09

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09

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09

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09

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09

22

/10

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09

23

/10

/20

09

24

/10

/20

09

25

/10

/20

09

26

/10

/20

09

27

/10

/20

09

28

/10

/20

09

29

/10

/20

09

30

/10

/20

09

31

/10

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - October 2009Running 8-hour mean concentration of carbon dioxide





November 2009


December 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/11

/20

09

02

/11

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09

03

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09

04

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09

05

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09

06

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09

07

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09

08

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09

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09

10

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09

11

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12

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09

13

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09

14

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09

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09

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09

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09

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20

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09

21

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09

22

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09

23

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09

24

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09

25

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09

26

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/20

09

27

/11

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09

28

/11

/20

09

29

/11

/20

09

30

/11

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - November 2009Running 8-hour mean concentration of carbon dioxide



0

1

2

3

4

5

6

7

8

9

10

11

12

01

/12

/20

09

02

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25

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29

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09

30

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09

31

/12

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M25 (B) - December 2009Running 8-hour mean concentration of carbon dioxide


Power failure

Power failure



4.4 M60

Figure 4.34: M60 running 8-hour mean concentration of carbon monoxide

January 2009


February 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

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09

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28

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09

29

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09

30

/01

/20

09

31

/01

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - January 2009Running 8-hour mean concentration of carbon dioxide


Power failure

0

1

2

3

4

5

6

7

8

9

10

11

12

01

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/20

09

02

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09

27

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09

28

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - February 2009Running 8-hour mean concentration of carbon dioxide





March 2009

Figure 4.37: M60 running 8-hour mean concentration of carbon monoxide April

2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

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09

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25

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27

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28

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09

29

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09

30

/03

/20

09

31

/03

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - March 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/04

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09

02

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09

29

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09

30

/04

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09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - April 2009Running 8-hour mean concentration of carbon dioxide




Figure 4.38: M60 running 8-hour mean concentration of carbon monoxide May

2009

Figure 4.39: M60 running 8-hour mean concentration of carbon monoxide June

2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

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09

02

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09

30

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09

31

/05

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - May 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/06

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09

02

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09

29

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09

30

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/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - June 2009Running 8-hour mean concentration of carbon dioxide




Figure 4.40: M60 running 8-hour mean concentration of carbon monoxide July

2009


August 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/07

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09

02

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29

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09

30

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/20

09

31

/07

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - July 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/08

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09

02

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24

/08

/20

09

25

/08

/20

09

26

/08

/20

09

27

/08

/20

09

28

/08

/20

09

29

/08

/20

09

30

/08

/20

09

31

/08

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - August 2009Running 8-hour mean concentration of carbon dioxide





September 2009


October 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/09

/20

09

02

/09

/20

09

03

/09

/20

09

04

/09

/20

09

05

/09

/20

09

06

/09

/20

09

07

/09

/20

09

08

/09

/20

09

09

/09

/20

09

10

/09

/20

09

11

/09

/20

09

12

/09

/20

09

13

/09

/20

09

14

/09

/20

09

15

/09

/20

09

16

/09

/20

09

17

/09

/20

09

18

/09

/20

09

19

/09

/20

09

20

/09

/20

09

21

/09

/20

09

22

/09

/20

09

23

/09

/20

09

24

/09

/20

09

25

/09

/20

09

26

/09

/20

09

27

/09

/20

09

28

/09

/20

09

29

/09

/20

09

30

/09

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - September 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/10

/20

09

02

/10

/20

09

03

/10

/20

09

04

/10

/20

09

05

/10

/20

09

06

/10

/20

09

07

/10

/20

09

08

/10

/20

09

09

/10

/20

09

10

/10

/20

09

11

/10

/20

09

12

/10

/20

09

13

/10

/20

09

14

/10

/20

09

15

/10

/20

09

16

/10

/20

09

17

/10

/20

09

18

/10

/20

09

19

/10

/20

09

20

/10

/20

09

21

/10

/20

09

22

/10

/20

09

23

/10

/20

09

24

/10

/20

09

25

/10

/20

09

26

/10

/20

09

27

/10

/20

09

28

/10

/20

09

29

/10

/20

09

30

/10

/20

09

31

/10

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - October 2009Running 8-hour mean concentration of carbon dioxide





November 2009


December 2009

0

1

2

3

4

5

6

7

8

9

10

11

12

01

/11

/20

09

02

/11

/20

09

03

/11

/20

09

04

/11

/20

09

05

/11

/20

09

06

/11

/20

09

07

/11

/20

09

08

/11

/20

09

09

/11

/20

09

10

/11

/20

09

11

/11

/20

09

12

/11

/20

09

13

/11

/20

09

14

/11

/20

09

15

/11

/20

09

16

/11

/20

09

17

/11

/20

09

18

/11

/20

09

19

/11

/20

09

20

/11

/20

09

21

/11

/20

09

22

/11

/20

09

23

/11

/20

09

24

/11

/20

09

25

/11

/20

09

26

/11

/20

09

27

/11

/20

09

28

/11

/20

09

29

/11

/20

09

30

/11

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - November 2009Running 8-hour mean concentration of carbon dioxide


0

1

2

3

4

5

6

7

8

9

10

11

12

01

/12

/20

09

02

/12

/20

09

03

/12

/20

09

04

/12

/20

09

05

/12

/20

09

06

/12

/20

09

07

/12

/20

09

08

/12

/20

09

09

/12

/20

09

10

/12

/20

09

11

/12

/20

09

12

/12

/20

09

13

/12

/20

09

14

/12

/20

09

15

/12

/20

09

16

/12

/20

09

17

/12

/20

09

18

/12

/20

09

19

/12

/20

09

20

/12

/20

09

21

/12

/20

09

22

/12

/20

09

23

/12

/20

09

24

/12

/20

09

25

/12

/20

09

26

/12

/20

09

27

/12

/20

09

28

/12

/20

09

29

/12

/20

09

30

/12

/20

09

31

/12

/20

09

Co

nce

ntr

atio

n (

mg/

m3)

Date

M60 - December 2009Running 8-hour mean concentration of carbon dioxide




5 Particulate Matter

5.1 M4 (Theale 2)

Figure 5.1: M4 (Theale 2) 24-hour mean concentration of particulate matter

January 2009

0

10

20

30

40

50

60

70

80

90

1000

1/0

1/2

00

9

02

/01

/20

09

03

/01

/20

09

04

/01

/20

09

05

/01

/20

09

06

/01

/20

09

07

/01

/20

09

08

/01

/20

09

09

/01

/20

09

10

/01

/20

09

11

/01

/20

09

12

/01

/20

09

13

/01

/20

09

14

/01

/20

09

15

/01

/20

09

16

/01

/20

09

17

/01

/20

09

18

/01

/20

09

19

/01

/20

09

20

/01

/20

09

21

/01

/20

09

22

/01

/20

09

23

/01

/20

09

24

/01

/20

09

25

/01

/20

09

26

/01

/20

09

27

/01

/20

09

28

/01

/20

09

29

/01

/20

09

30

/01

/20

09

31

/01

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - January 200924-hour mean concentration of PM10





February 2009


March 2009

0

10

20

30

40

50

60

70

80

90

100

01

/02

/20

09

02

/02

/20

09

03

/02

/20

09

04

/02

/20

09

05

/02

/20

09

06

/02

/20

09

07

/02

/20

09

08

/02

/20

09

09

/02

/20

09

10

/02

/20

09

11

/02

/20

09

12

/02

/20

09

13

/02

/20

09

14

/02

/20

09

15

/02

/20

09

16

/02

/20

09

17

/02

/20

09

18

/02

/20

09

19

/02

/20

09

20

/02

/20

09

21

/02

/20

09

22

/02

/20

09

23

/02

/20

09

24

/02

/20

09

25

/02

/20

09

26

/02

/20

09

27

/02

/20

09

28

/02

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - February 200924-hour mean concentration of PM10


0

10

20

30

40

50

60

70

80

90

100

01

/03

/20

09

02

/03

/20

09

03

/03

/20

09

04

/03

/20

09

05

/03

/20

09

06

/03

/20

09

07

/03

/20

09

08

/03

/20

09

09

/03

/20

09

10

/03

/20

09

11

/03

/20

09

12

/03

/20

09

13

/03

/20

09

14

/03

/20

09

15

/03

/20

09

16

/03

/20

09

17

/03

/20

09

18

/03

/20

09

19

/03

/20

09

20

/03

/20

09

21

/03

/20

09

22

/03

/20

09

23

/03

/20

09

24

/03

/20

09

25

/03

/20

09

26

/03

/20

09

27

/03

/20

09

28

/03

/20

09

29

/03

/20

09

30

/03

/20

09

31

/03

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - March 200924-hour mean concentration of PM10





April 2009


May 2009

0

10

20

30

40

50

60

70

80

90

100

01

/04

/20

09

02

/04

/20

09

03

/04

/20

09

04

/04

/20

09

05

/04

/20

09

06

/04

/20

09

07

/04

/20

09

08

/04

/20

09

09

/04

/20

09

10

/04

/20

09

11

/04

/20

09

12

/04

/20

09

13

/04

/20

09

14

/04

/20

09

15

/04

/20

09

16

/04

/20

09

17

/04

/20

09

18

/04

/20

09

19

/04

/20

09

20

/04

/20

09

21

/04

/20

09

22

/04

/20

09

23

/04

/20

09

24

/04

/20

09

25

/04

/20

09

26

/04

/20

09

27

/04

/20

09

28

/04

/20

09

29

/04

/20

09

30

/04

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - April 200924-hour mean concentration of PM10


0

10

20

30

40

50

60

70

80

90

100

01

/05

/20

09

02

/05

/20

09

03

/05

/20

09

04

/05

/20

09

05

/05

/20

09

06

/05

/20

09

07

/05

/20

09

08

/05

/20

09

09

/05

/20

09

10

/05

/20

09

11

/05

/20

09

12

/05

/20

09

13

/05

/20

09

14

/05

/20

09

15

/05

/20

09

16

/05

/20

09

17

/05

/20

09

18

/05

/20

09

19

/05

/20

09

20

/05

/20

09

21

/05

/20

09

22

/05

/20

09

23

/05

/20

09

24

/05

/20

09

25

/05

/20

09

26

/05

/20

09

27

/05

/20

09

28

/05

/20

09

29

/05

/20

09

30

/05

/20

09

31

/05

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - May 200924-hour mean concentration of PM10


Instrument fault




June 2009


July 2009

0

10

20

30

40

50

60

70

80

90

100

01

/06

/20

09

02

/06

/20

09

03

/06

/20

09

04

/06

/20

09

05

/06

/20

09

06

/06

/20

09

07

/06

/20

09

08

/06

/20

09

09

/06

/20

09

10

/06

/20

09

11

/06

/20

09

12

/06

/20

09

13

/06

/20

09

14

/06

/20

09

15

/06

/20

09

16

/06

/20

09

17

/06

/20

09

18

/06

/20

09

19

/06

/20

09

20

/06

/20

09

21

/06

/20

09

22

/06

/20

09

23

/06

/20

09

24

/06

/20

09

25

/06

/20

09

26

/06

/20

09

27

/06

/20

09

28

/06

/20

09

29

/06

/20

09

30

/06

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - June 200924-hour mean concentration of PM10


0

10

20

30

40

50

60

70

80

90

100

01

/07

/20

09

02

/07

/20

09

03

/07

/20

09

04

/07

/20

09

05

/07

/20

09

06

/07

/20

09

07

/07

/20

09

08

/07

/20

09

09

/07

/20

09

10

/07

/20

09

11

/07

/20

09

12

/07

/20

09

13

/07

/20

09

14

/07

/20

09

15

/07

/20

09

16

/07

/20

09

17

/07

/20

09

18

/07

/20

09

19

/07

/20

09

20

/07

/20

09

21

/07

/20

09

22

/07

/20

09

23

/07

/20

09

24

/07

/20

09

25

/07

/20

09

26

/07

/20

09

27

/07

/20

09

28

/07

/20

09

29

/07

/20

09

30

/07

/20

09

31

/07

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - July 200924-hour mean concentration of PM10





August 2009


September 2009

0

10

20

30

40

50

60

70

80

90

100

01

/08

/20

09

02

/08

/20

09

03

/08

/20

09

04

/08

/20

09

05

/08

/20

09

06

/08

/20

09

07

/08

/20

09

08

/08

/20

09

09

/08

/20

09

10

/08

/20

09

11

/08

/20

09

12

/08

/20

09

13

/08

/20

09

14

/08

/20

09

15

/08

/20

09

16

/08

/20

09

17

/08

/20

09

18

/08

/20

09

19

/08

/20

09

20

/08

/20

09

21

/08

/20

09

22

/08

/20

09

23

/08

/20

09

24

/08

/20

09

25

/08

/20

09

26

/08

/20

09

27

/08

/20

09

28

/08

/20

09

29

/08

/20

09

30

/08

/20

09

31

/08

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - August 200924-hour mean concentration of PM10


0

10

20

30

40

50

60

70

80

90

100

01

/09

/20

09

02

/09

/20

09

03

/09

/20

09

04

/09

/20

09

05

/09

/20

09

06

/09

/20

09

07

/09

/20

09

08

/09

/20

09

09

/09

/20

09

10

/09

/20

09

11

/09

/20

09

12

/09

/20

09

13

/09

/20

09

14

/09

/20

09

15

/09

/20

09

16

/09

/20

09

17

/09

/20

09

18

/09

/20

09

19

/09

/20

09

20

/09

/20

09

21

/09

/20

09

22

/09

/20

09

23

/09

/20

09

24

/09

/20

09

25

/09

/20

09

26

/09

/20

09

27

/09

/20

09

28

/09

/20

09

29

/09

/20

09

30

/09

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - September 200924-hour mean concentration of PM10





October 2009


November 2009

0

10

20

30

40

50

60

70

80

90

100

01

/10

/20

09

02

/10

/20

09

03

/10

/20

09

04

/10

/20

09

05

/10

/20

09

06

/10

/20

09

07

/10

/20

09

08

/10

/20

09

09

/10

/20

09

10

/10

/20

09

11

/10

/20

09

12

/10

/20

09

13

/10

/20

09

14

/10

/20

09

15

/10

/20

09

16

/10

/20

09

17

/10

/20

09

18

/10

/20

09

19

/10

/20

09

20

/10

/20

09

21

/10

/20

09

22

/10

/20

09

23

/10

/20

09

24

/10

/20

09

25

/10

/20

09

26

/10

/20

09

27

/10

/20

09

28

/10

/20

09

29

/10

/20

09

30

/10

/20

09

31

/10

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - October 200924-hour mean concentration of PM10


0

10

20

30

40

50

60

70

80

90

100

01

/11

/20

09

02

/11

/20

09

03

/11

/20

09

04

/11

/20

09

05

/11

/20

09

06

/11

/20

09

07

/11

/20

09

08

/11

/20

09

09

/11

/20

09

10

/11

/20

09

11

/11

/20

09

12

/11

/20

09

13

/11

/20

09

14

/11

/20

09

15

/11

/20

09

16

/11

/20

09

17

/11

/20

09

18

/11

/20

09

19

/11

/20

09

20

/11

/20

09

21

/11

/20

09

22

/11

/20

09

23

/11

/20

09

24

/11

/20

09

25

/11

/20

09

26

/11

/20

09

27

/11

/20

09

28

/11

/20

09

29

/11

/20

09

30

/11

/20

09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M4 (Theale 2) - November 200924-hour mean concentration of PM10





December 2009

0

10

20

30

40

50

60

70

80

90

100

01

/12

/20

09

02

/12

/20

09

03

/12

/20

09

04

/12

/20

09

05

/12

/20

09

06

/12

/20

09

07

/12

/20

09

08

/12

/20

09

09

/12

/20

09

10

/12

/20

09

11

/12

/20

09

12

/12

/20

09

13

/12

/20

09

14

/12

/20

09

15

/12

/20

09

16

/12

/20

09

17

/12

/20

09

18

/12

/20

09

19

/12

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Co

nce

ntr

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n (

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m3)

Date

M4 (Theale 2) - December 200924-hour mean concentration of PM10




5.2 M25 (B)

Figure 5.13: M25 (B) 24-hour mean concentration of particulate matter January

2009

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Co

nce

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n (

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Date

M25 (B) - January 200924-hour mean concentration of PM10


Power failure



Figure 5.14: M25 (B) 24-hour mean concentration of particulate matter

February 2009

Figure 5.15: M25 (B) 24-hour mean concentration of particulate matter March

2009

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Co

nce

ntr

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n (

µg/

m3)

Date

M25 (B) - February 200924-hour mean concentration of PM10


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Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - March 200924-hour mean concentration of PM10




Figure 5.16: M25 (B) 24-hour mean concentration of particulate matter April

2009

Figure 5.17: M25 (B) 24-hour mean concentration of particulate matter May

2009

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Co

nce

ntr

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n (

µg/

m3)

Date

M25 (B) - April 200924-hour mean concentration of PM10


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Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - May 200924-hour mean concentration of PM10




Figure 5.18: M25 (B) 24-hour mean concentration of particulate matter June

2009

Figure 5.19: M25 (B) 24-hour mean concentration of particulate matter July

2009

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - June 200924-hour mean concentration of PM10


0

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09

Co

nce

ntr

atio

n (

µg/

m3)

Date

M25 (B) - July 200924-hour mean concentration of PM10




Figure 5.20: M25 (B) 24-hour mean concentration of particulate matter August

2009


September 2009

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Co

nce

ntr

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n (

µg/

m3)

Date

M25 (B) - August 200924-hour mean concentration of PM10


0

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Co

nce

ntr

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n (

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m3)

Date

M25 (B) - September 200924-hour mean concentration of PM10




Figure 5.22: M25 (B) 24-hour mean concentration of particulate matter October

2009


November 2009

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Co

nce

ntr

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n (

µg/

m3)

Date

M25 (B) - October 200924-hour mean concentration of PM10


0

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Co

nce

ntr

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n (

µg/

m3)

Date

M25 (B) - November 200924-hour mean concentration of PM10


Power failure




December 2009

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Co

nce

ntr

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n (

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m3)

Date

M25 (B) - December 200924-hour mean concentration of PM10


Power failure



5.3 M60

Figure 5.25: M60 24-hour mean concentration of particulate matter January

2009

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Co

nce

ntr

atio

n (

µg/

m3)

Date

M60 - January 200924-hour mean concentration of PM10


Power failure



Figure 5.26: M60 24-hour mean concentration of particulate matter February

2009

Figure 5.27: M60 24-hour mean concentration of particulate matter March 2009

0

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Co

nce

ntr

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n (

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m3)

Date

M60 - February 200924-hour mean concentration of PM10


0

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Co

nce

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n (

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m3)

Date

M60 - March 200924-hour mean concentration of PM10


Instrument fault



Figure 5.28: M60 24-hour mean concentration of particulate matter April 2009

Figure 5.29: M60 24-hour mean concentration of particulate matter May 2009

0

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Date

M60 - April 200924-hour mean concentration of PM10


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Date

M60 - May 200924-hour mean concentration of PM10




Figure 5.30: M60 24-hour mean concentration of particulate matter June 2009

Figure 5.31: M60 24-hour mean concentration of particulate matter July 2009

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m3)

Date

M60 - June 200924-hour mean concentration of PM10


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m3)

Date

M60 - July 200924-hour mean concentration of PM10




Figure 5.32: M60 24-hour mean concentration of particulate matter August

2009

Figure 5.33: M60 24-hour mean concentration of particulate matter September

2009

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Date

M60 - August 200924-hour mean concentration of PM10


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Date

M60 - September 200924-hour mean concentration of PM10




Figure 5.34: M60 24-hour mean concentration of particulate matter October

2009

Figure 5.35: M60 24-hour mean concentration of particulate matter November

2009

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Date

M60 - October 200924-hour mean concentration of PM10


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Date

M60 - November 200924-hour mean concentration of PM10




Figure 5.36: M60 24-hour mean concentration of particulate matter December

2009

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Date

M60 - December 200924-hour mean concentration of PM10




6 Historical compliance with air quality standards,

limits and objectives

6.1: Comparison with UK Air Quality Strategy objectives, M4 site

Pollutant CO NO2 O3 PM10 (TEOM*1.3) ▲

PM2.5

UK Air Quality

Objective

(Conc.

Threshold)

Max daily running

8-hr

mean (10

mg/m3

Maximum of 18

exceedances of

1-hr mean (200

µg/m3)

Annual

mean

(40

µg/m3)

Maximum of 10 exceedances of

running 8-hr

mean (100

µg/m3)

Maximum of 35

exceedances

of 24-hr mean

(50 μg/m3)

Annual

mean

(40

μg/m3)

Annual

mean

(25

μg/m3)

1992

(Aug – Dec) 0 17.9 - - -

1993 0 18.8 - - -

1994

(Jan to June) 3.6 0 32.6 3 - - -

1995 (Apr to Dec)

2.8 2 32.0 6 - - -

1996 3.5 8 48.3 0 48 36.1 -

1997 3.8 47 54.8 61 39 34.0 -

1998 2.2 90 49.1 0 36 32.3 -

1999 1.7 3 57.2 34 25 27.7 -

2000 1.8 0 48.6 34 7 23.9 -

2001 2.1 0 44.2 174 21 31.6 -

2002 3.4 0 41.5 4 30 32.3 -

2003 3.2 72 60.2 30 46 32.7 -

2004 2.6 0 52.2 0 15 30.2 -

2005 2.3 0 57.1 0 9 28.2 -

2006 1.1 0 50.7 0 14 28.0 14.8

2007 1.8 1 41.3 0 9 28.6 14.2

2008 1.6 0 42.8 9 11 27.7 13.6

2009 1.6 2 50.5 3 2 26.3 12.6

▲ In order to maintain the long term comparisons of PM10 data, a 1.3 correction factor has been applied to data

collected by TEOM analysers across the Highways Agency network in 2009 in this summary table.

6.2: Comparison with UK Air Quality Strategy objectives, Bell Common Tunnel

site

Pollutant CO NO2 O3 PM10 (Osiris) PM2.5

UK Air

Quality

Objective

(Conc. Threshold)

Max daily

running

8-hr

mean (10 mg/m3

Maximum of 18

exceedances of

1-hr mean (200

µg/m3)

Annual

mean

(40

µg/m3)

Maximum of 10

exceedances of

running 8-hr

mean (100 µg/m3)

Maximum of

35

exceedances

of 24-hr mean (50 μg/m3)

Annual

mean

(40

μg/m3)

Annual

mean

(25

μg/m3)

2007 2.4 736 139.9 0 714 44.8 17.0

2008 2.1 1976 158.6 0 50 45.0 16.4

2009 5.9 4022 241.4 0 - - -




Pollutant CO NO2 O3 PM10 (TEOM*1.3) ▲

SO2 PM2.5

UK Air Quality

Objective (Conc.

Threshold)

Max daily

running 8-hr

mean (10

mg/m3

Maximum of 18

exceedances of

1-hr mean (200

µg/m3)

Annual

mean (40

µg/m3)

Maximum of 10

exceedances of

running 8-hr mean

(100 µg/m3)

Maximum of 35

exceedances of 24-

hr mean (50

μg/m3)

Annual

mean (40

μg/m3)

Max. 24-hr

mean (125

μg/m3)

Max. 15-min

mean (266

μg/m3)

Annual

mean (25

μg/m3)

1995

(May – Dec) 4.6 7 50.2 0 3 44.2 - - -

1996 3.8 5 57.1 38 90 40.5 - - -

1997 6.8 2 49.5 2 54 35.1 58.1 150.0 -

1998 5.1 0 38.6 12 22 28.1 44.2 102.9 -

1999 3.1 0 43.9 83 25 25.0 41.7 136.6 -

2000 2.3 0 40.9 0 17 27.6 38.6 69.2 -

2001 3.1 0 38.8 18 26 27.3 35.1 79.5 -

2002 2.6 0 39.1 0 27 25.0 27.4 67.8 -

2003 3.4 0 54.6 15 26 27.6 48.4 104.3 -

2004 1.8 21 56.1 0 19 28.0 40.0 58.5 -

2005 1.9 0 42.7 0 8 23.6 45.0 52.0 -

2006 1.2 9 59.3 0 29 29.4 27.7 64.5 14.7

2007 2.0 32 57.3 0 21 28.3 28.2 48.0 15.3

2008 1.3 12 52.4 7 18 26.3 30.1 96.7 14.9

2009 1.1 7 57.0 0 7 26.1 17.9 13.9

▲ In order to maintain the long term comparisons of PM10 data, a 1.3 correction factor has been applied to data collected by TEOM analysers across the Highways Agency

network in 2009 in this summary table.




Pollutant CO NO2 O3 PM10 (TEOM x1.3) ▲ SO2 PM2.5

UK Air

Quality

Objective

(conc. Threshold)

Max daily

running 8-hr

mean (10

mg/m3

Maximum of 18

exceedances of

1-hr mean (200

µg/m3)

Annual mean

(40 µg/m3)

Maximum of 10

exceedances of

running 8-hr mean

(100 µg/m3)

Maximum of 35

exceedances of 24-

hr mean (50 μg/m3)

Annual mean

(40 μg/m3)

Max. 24-hr

mean (125

μg/m3)

Max. 15-

min mean

(266

μg/m3)

Annual mean

(25 μg/m3)

1999

(May – Dec) 2.2 0 41.6 65 1 22.6 - - -

2000 5.0 0 44.1 29 5 21.4 - - -

UK Air

Quality

Objective

(conc.

Threshold)

Max daily

running 8-hr

mean (10

mg/m3

Maximum of 18

exceedances of

1-hr mean (200

µg/m3)

Annual

mean (40

µg/m3)

Maximum of 10

exceedances of

running 8-hr mean

(100 µg/m3)

Maximum of 35

exceedances of 24-

hr mean (50 μg/m3)

Annual mean

(40 μg/m3)

Max. 24-hr

mean (125

μg/m3)

Max. 15-

min mean

(266

μg/m3)

Annual mean

(25 μg/m3)

2001 3.0 0 37.7 17 9 23.9 - - -

2002 2.6 0 42.5 16 10 24.6 - - -

2003 3.9 0 53.6 159 55 35.0 22.5 50.6 -

2004 2.4 1 48.9 31 10 25.9 27.1 89.4 -

2005 3.4 2 46.1 20 10 27.6 22.2 51.8 -

2006 2.2 0 45.3 87 21 27.7 27.7 96.1 13.0

2007 1.9 30 51.5 0 13 27.0 23.0 47.2 13.5

2008 2.0 0 44.6 17 7 22.9 16.8 44.7 10.7

2009 1.3 0 44.8 316 0 19.8 40.8 13.1

▲ In order to maintain the long term comparisons of PM10 data, a 1.3 correction factor has been applied to data collected by TEOM analysers across the Highways Agency

network in 2009 in this summary table.



7 Historical hourly data summary statistics

7.1: M4 summary statistics of hourly data, 1992 to 2009

Pollutant Min. Med. Avg. Max. Std. dev.

Data capture (% of

calendar

year)

19

92

(A

ug

to

Dec)

CO (mg/m3) 0.0 0.8 1.0 6.8 0.8 36

NO (μg/m3) 1.0 229.0 274.0 1175.0 237.0 28

NO2 (μg/m3) 0.7 17.3 17.9 85.9 9.5 28

NOX (μg/m3) 2.0 247.4 291.6 1195.5 240.0 28

O3 (μg/m3) 0.0 2.7 5.8 54.4 7.1 23

CH4 (mg/m3) 1.7 2.0 2.2 6.6 0.6 23

NMHC (mg/m3) 0.0 0.2 0.3 2.7 0.3 36

19

93

CO (mg/m3) 0.0 0.6 0.8 5.6 0.7 85

NO (μg/m3) 0.0 187.0 216.0 1067.0 180.0 92

NO2 (μg/m3) 0.1 17.8 18.8 77.3 10.1 89

NOX (μg/m3) 2.7 199.4 226.6 1098.2 178.2 86

O3 (μg/m3) 0.0 5.0 8.7 52.9 9.6 92

CH4 (mg/m3) 1.7 2.0 2.2 7.9 0.6 34

NMHC (mg/m3) 0.0 0.2 0.3 2.9 0.2 58

Total traffic (veh/hr) 155 4556 3950 10445 17

Annual average daily traffic

(veh/day) 94782 17

19

94

(Jan

to

Ju

ne)

CO (mg/m3) 0.0 0.6 0.8 4.3 0.6 99

NO (μg/m3) 1.25 183.75 217.23 1138.75 183.99 99

NO2 (μg/m3) 1.34 31.13 32.62 117.08 16.58 99

NOX (μg/m3) 4.78 318.40 364.55 1761.02 285.63 99

O3 (μg/m3) 0.2 17.2 21.6 121.6 18.7 76

CH4 (mg/m3) 1.15 1.30 1.36 4.05 0.22 74

NMHC (mg/m3) 0.00 0.10 0.12 1.14 0.10 86

19

95

(A

pr t

o D

ec)

CO (mg/m3) 0.0 0.5 0.6 3.0 0.4 62

NO (μg/m3) 1.25 150.00 195.74 905.00 165.80 57

NO2 (μg/m3) 0.00 29.22 32.02 233.40 23.11 52

NOX (μg/m3) 1.91 252.41 324.56 1401.94 259.37 52

O3 (μg/m3) 0.2 9.0 18.4 121.6 21.2 62

CH4 (mg/m3) 1.13 1.38 1.50 3.81 0.37 33

NMHC (mg/m3) 0.01 0.10 0.13 0.87 0.10 33



(veh/day) 94704 15




Data capture (% of

calendar

year)

19

96

CO (mg/m3) 0.0 0.6 0.7 5.6 0.6 98

NO (μg/m3) 0.00 102.50 147.24 1022.50 147.28 87

NO2 (μg/m3) 0.57 44.50 48.28 266.06 26.89 87

NOX (μg/m3) 3.82 209.72 272.41 1583.96 231.39 87

O3 (μg/m3) 0.2 10.0 18.3 100.4 19.3 91

PM10 (μg/m3)

(TEOM, unadjusted) 0.3 24.1 27.8 172.5 17.1 83

PM10 (μg/m3)

(TEOM, data x 1.3) 0.4 31.3 36.1 224.3 22.2 83

CH4 (mg/m3) 1.01 1.39 1.54 5.73 0.50 89

NMHC (mg/m3) 0.00 0.10 0.13 1.55 0.11 86



(veh/day) 98417 69

19

97

CO (mg/m3) 0.0 0.5 0.7 6.1 0.6 94

NO (μg/m3) 0.00 87.50 119.70 882.50 117.57 94

NO2 (μg/m3) 0.00 47.75 54.78 297.96 35.85 92

NOX (μg/m3) 7.64 198.64 236.94 1298.8 187.34 92

O3 (μg/m3) 0.2 11.0 21.97 177.0 25.2 95

PM10 (μg/m3)

(TEOM, unadjusted) 1.0 23.0 26.1 152.0 15.5 93

PM10 (μg/m3) (TEOM, data x 1.3)

1.3 29.9 34.0 197.6 20.2 94

CH4 (mg/m3) 1.00 1.40 1.60 6.20 0.70 66

NMHC (mg/m3) 0.00 0.10 0.10 1.00 0.10 66



(veh/day) 103718 69

19

98

CO (mg/m3) 0.0 0.4 0.5 2.9 0.4 95

NO (μg/m3) 0.00 62.50 96.34 815.00 99.53 86

NO2 (μg/m3) 0.00 38.77 49.15 281.73 40.24 87

NOX (μg/m3) 0.96 154.43 197.27 1292.12 164.53 85

O3 (μg/m3) 0.0 7.0 12.7 96.6 13.4 85

PM10 (μg/m3)

(TEOM, unadjusted) 0.5 21.5 24.8 186.6 15.3 93

PM10 (μg/m3)

(TEOM, data x 1.3) 0.7 28.0 32.3 242.6 19.9 93

CH4 (mg/m3) 1.06 1.37 1.50 5.87 0.51 71

NMHC (mg/m3) 0.00 0.05 0.07 0.79 0.07 69

Total traffic (veh/hr) 4464 31

Annual average daily traffic (veh/day)

107019 31




Data capture

(% of calendar

year)

19

99

CO (mg/m3) 0.0 0.5 0.6 2.4 0.4 73

NO (μg/m3) 0.00 57.50 85.80 743.75 88.83 73

NO2 (μg/m3) 0.00 55.96 57.15 234.55 29.82 74

NOX (μg/m3) 2.67 148.98 188.67 1253.53 151.75 73

O3 (μg/m3) 0.0 8.6 19.6 144.4 24.3 74

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 16.5 21.3 222.9 19.3 63

PM10 (μg/m3)

(TEOM, data x 1.3) 0.0 21.5 27.7 289.8 25.1 63

CH4 (mg/m3) 0.95 1.33 1.45 5.75 0.44 32

NMHC (mg/m3) 0.00 0.06 0.09 0.79 0.09 32


Annual average daily

traffic (veh/day) 105804 25

20

00

CO (mg/m3) 0.0 0.5 0.6 2.4 0.4 96

NO (μg/m3) 0.00 81.25 100.09 672.50 86.32 88

NO2 (μg/m3) 1.53 48.32 48.58 166.17 25.43 88

NOX (μg/m3) 3.44 178.20 201.51 1097.30 148.89 88

O3 (μg/m3) 0.6 10.6 23.2 132.2 25.9 61

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 15.8 18.4 125.9 12.1 96

PM10 (μg/m3)

(TEOM, data x 1.3) 0.0 20.5 23.9 163.7 15.7 96

CH4 (mg/m3) 1.08 1.37 1.53 5.67 0.52 66

NMHC (mg/m3) 0.01 0.08 0.09 0.54 0.05 61

Total traffic (veh/hr) 192 5313.5 4670 11686 53



20

01

CO (mg/m3) 0.0 0.6 0.7 2.8 0.4 90

NO (μg/m3) 0.00 55.00 80.72 581.25 80.87 92

NO2 (μg/m3) 0.57 42.98 44.22 154.71 22.26 92

NOX (μg/m3) 3.44 133.70 167.56 959.78 134.15 92

O3 (μg/m3) 0.0 9.0 23.2 162.6 30.15 84

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 20.6 24.3 163.4 15.4 82


0.0 26.8 31.6 212.4 20.1 82






Pollutant Min. Med. Avg. Max. Std. dev. Data capture

(% of calendar

year)

20

02

CO (mg/m3) 0.0 0.6 0.7 3.9 0.5 89

NO (μg/m3) 0.02 54.72 91.90 813.13 103.75 84

NO2 (μg/m3) 0.49 35.36 41.54 171.26 26.35 84

NOX (μg/m3) 2.70 121.92 181.96 1317.98 174.52 84

O3 (μg/m3) 0.1 15.6 21.4 138.5 19.5 89

PM10 (μg/m3)

(TEOM, unadjusted) 0.1 21.6 24.8 336.4 16.4 93

PM10 (μg/m3)

(TEOM, data x 1.3) 0.1 28.1 32.3 437.3 21.3 93

Total traffic (veh/hr) 4794 76


114974 76

20

03

CO (mg/m3) 0.0 0.5 0.6 3.9 0.5 99

NO (μg/m3) 0.00 44.00 90.52 1073.44 120.37 93

NO2 (μg/m3) 0.00 53.00 60.20 471.77 39.61 93

NOX (μg/m3) 2.87 135.82 198.41 1739.88 200.42 93

O3 (μg/m3) 0.2 14.4 21.8 290.2 22.0 53

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 21.2 25.1 134.5 15.9 90

PM10 (μg/m3)

(TEOM, data x 1.3) 0.0 27.6 32.7 174.9 20.7 90

Total Traffic Flow (veh/hr)

0 5452 4768 11854 3273 92



20

04

CO (mg/m3) 0.0 0.7 0.8 3.9 0.5 85

NO (μg/m3) 0.00 54.38 72.57 480.75 70.70 87

NO2 (μg/m3) 0.00 50.04 52.21 152.61 25.47 87

NOX (μg/m3) 2.48 136.95 163.27 843.07 127.29 87

O3 (μg/m3) 0.4 13.8 19.3 95.2 16.7 99

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 20.8 23.2 153.3 12.6 99

PM10 (μg/m3)

(TEOM, data x 1.3) 0.0 27.0 30.2 199.3 16.4 99

Total Traffic Flow

(veh/hr) 160 5324 4718 11216 3273 63





Pollutant Min. Med. Avg. Max. Std. dev. Data capture (% of

calendar year)

20

05

CO (mg/m3) 0.0 0.1 0.2 3.3 0.3 96

NO (μg/m3) 0.00 62.49 81.02 543.90 73.55 92

NO2 (μg/m3) 1.49 54.51 57.05 195.66 28.44 92

NOX (μg/m3) 2.98 153.62 180.83 980.52 134.17 92

O3 (μg/m3) 0.6 11.7 15.8 70.0 12.8 97

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 19.1 21.7 134.1 12.4 94

PM10 (μg/m3)

(TEOM, data x 1.3) 0.0 24.9 28.2 174.4 16.1 94

CH4 (mg/m3) 1.17 1.51 1.62 6.91 0.38 26

NMHC (mg/m3) 0.00 0.14 0.14 0.39 0.07 22

Total traffic (veh/hr) 0 5599 4915 11481 3329 79


(veh/day) 117962 79

20

06

CO (mg/m3) 0.0 0.2 0.2 1.5 0.2 95

NO (μg/m3) 0.67 53.39 71.42 721.91 69.13 95

NO2 (μg/m3) 0.39 47.16 50.67 165.91 28.43 95

NOX (μg/m3) 4.00 134.25 161.73 1329.09 131.54 95

O3 (μg/m3) 0.4 12.8 17.2 109.4 14.1 98

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 19.0 21.5 140.6 12.1 92

PM10 (μg/m3)

(TEOM, data x 1.3) 0.0 24.7 28.0 182.8 15.8 92

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.0 12.9 14.8 69.8 8.4 55

CH4 (mg/m3) 1.07 1.47 1.56 5.53 0.34 19

NMHC (mg/m3) 0.00 0.05 0.06 0.34 0.05 19



(veh/day) 116573 84



Pollutant Min. Med. Avg. Max. Std. dev. Data capture (% of calendar year)

20

07

CO (mg/m3) 0.0 0.2 0.2 2.2 0.2 91

NO (μg/m3) 0.14 40.13 63.54 764.99 73.15 89

NO2 (μg/m3) 0.57 35.33 41.32 207.77 27.21 89

NOX (μg/m3) 1.15 100.48 138.40 1368.08 131.22 89

O3 (μg/m3) 1.60 15.84 19.73 111.76 14.69 90

PM10 (μg/m3)

(TEOM, unadjusted) 0.9 19.7 22.0 176.5 11.5 89

PM10 (μg/m3)

(TEOM, data x 1.3) 1.2 25.6 28.6 229.5 15.0 89

PM10 (μg/m3)

(VCM adjusted) 0.11 21.16 24.86 203.84 15.11 89

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.8 12.3 14.2 118.7 8.2 89

CH4 (mg/m3) 0.95 1.40 1.62 9.96 0.79 61

NMHC (mg/m3) 0.00 0.02 0.04 1.01 0.07 61



(veh/day) 116225 100

20

08

CO (mg/m3) 0.01 0.29 0.31 1.62 0.19 99

NO (μg/m3) 0.07 58.33 83.02 864.58 86.62 99

NO2 (μg/m3) 1.00 40.02 42.83 126.54 23.17 99

NOX (μg/m3) 1.52 102.09 125.84 895.16 100.17 99

O3 (μg/m3) 4.01 26.60 29.23 108.32 15.14 99

PM10 (μg/m3)

(TEOM, unadjusted) 1.19 18.94 21.28 239.78 12.24 99

PM10 (μg/m3)

(TEOM, data x 1.3) 1.55 24.62 27.69 311.71 15.91 99

PM10 (μg/m3)

(VCM) 8.8 22.8 25.6 75.8 11.0 96

PM2.5 (μg/m3)

(TEOM) 0.99 12.13 13.56 71.50 7.07 99

CH4 (mg/m3) 0.7 1.4 1.5 11.8 0.7 88



(veh/day) 117334 54

20

09

CO (mg/m3) 0.00 0.35 0.37 3.42 0.23 96

NO (μg/m3) 0.83 72.73 93.81 1132.41 83.60 99

NO2 (μg/m3) 1.14 45.75 50.51 226.86 27.40 99

NOX (μg/m3) 3.92 122.33 144.32 1359.26 104.44 99

O3 (μg/m3) 0.14 15.08 21.51 107.94 18.92 100

PM10 (μg/m3)

(TEOM, unadjusted) 0.42 18.08 20.20 181.33 11.14 99

PM10 (μg/m3)

(TEOM, data x 1.3) 0.55 23.50 26.26 235.72 14.48 99

PM10 (μg/m3)

(VCM) 0.35 20.87 24.03 198.93 13.61 99

PM2.5 (μg/m3)

(TEOM) 0.27 11.03 12.58 141.92 7.42 98

CH4 (mg/m3) 0.68 1.32 1.46 15.32 0.77 25



(veh/day) 108516



7.2: Bell Common summary statistics of hourly data, 2007 to 2009 Pollutant Min. Med. Avg. Max. Std. dev.

Data capture (%

of calendar year)

20

07

CO (mg/m3) 0.1 0.7 0.8 5.0 0.4 93

NO (μg/m3) 4.39 499.95 542.15 3189.35 296.09 100

NO2 (μg/m3) 15.26 135.28 139.85 544.46 46.69 100

NOX (μg/m3) 22.96 894.76 968.24 4937.35 486.37 100

O3 (μg/m3) 0.1 1.3 1.5 14.9 1.3 92

PM10 (μg/m3) (Osiris)

2.2 39.1 44.8 376.2 27.2 32

PM2.5 (μg/m3)

(Osiris) 1.0 14.5 17.0 136.9 10.7 32

PM1 (μg/m3) (Osiris) 0.2 4.0 5.2 49.5 4.3 32




20

08

CO (mg/m3) 0.04 0.77 0.78 2.08 0.29 79

NO (μg/m3) 13.93 764.08 814.33 6723.54 413.45 98

NO2 (μg/m3) 32.81 150.47 158.57 750.35 57.92 98

NOX (μg/m3) 59.87 908.19 972.88 7123.97 456.04 98

O3 (μg/m3) 0.29 1.23 1.36 8.06 0.65 100

PM10 (μg/m3) (Osiris)

8.10 38.10 44.99 589.90 30.56 52

PM2.5 (μg/m3) (Osiris)

3.05 14.31 16.38 178.50 11.44 52

PM1 (μg/m3) (Osiris) 0.98 3.88 4.80 58.76 4.33 52

TSP (μg/m3) (Osiris) 10.13 52.20 61.04 720.08 43.31 52

Total traffic (veh/hr) 192 5874 5289 11824 3066 n/a


traffic (veh/day) 126929 n/a

20

09

CO (mg/m3) 0.00 1.10 1.29

(annualised) 7.37 0.75 48

NO (μg/m3) 5.04 1160.07 1481.52

(annualised) 8141.29 791.30 71

NO2 (μg/m3) 3.07 230.63 254.58

(annualised) 1070.85 101.55 71

NOX (μg/m3) 34.06 1389.07 1645.10

(annualised) 8652.06 862.70 71

O3 (μg/m3) 0.00 2.56 2.43

(annualised) 10.98 0.88 74

PM10 (μg/m3)

(Osiris) - - - - - -

PM2.5 (μg/m3)

(Osiris) - - - - - -

PM1 (μg/m3) (Osiris) - - - - - -

TSP (μg/m3) (Osiris) - - - - - -

Total traffic (veh/hr) - - - - - -


traffic (veh/day) -




(Note: from 2004, the M25 site was relocated approx 100m to the north)

Pollutant Min. Med. Avg. Max. Std.

dev.

Data capture

(% of calendar year)

19

95

(M

ay t

o D

ec)

CO (mg/m3) 0.0 0.9 1.1 7.1 0.9 84

NO (μg/m3) 0.00 200.00 243.50 968.75 203.21 83

NO2 (μg/m3) 0.19 45.46 50.22 235.31 30.41 78

NOX (μg/m3) 5.35 341.70 411.20 1454.83 321.43 78

O3 (μg/m3) 0.4 13.2 18.4 104.4 15.4 82

PM10 (μg/m3)

(TEOM, unadjusted) 2.7 28.1 34.0 191.1 25.3 4

PM10 (μg/m3)

(TEOM, data x 1.3) 3.5 36.5 44.2 248.4 32.9 4

CH4 (mg/m3) 1.15 1.35 1.41 3.69 0.26 5

NMHC (mg/m3) 0.00 0.10 0.13 0.49 0.10 4



(veh/day) 180368 44

19

96

CO (mg/m3) 0.0 0.9 1.0 5.5 0.8 95

NO (μg/m3) 0.00 160.00 215.12 1432.50 193.99 97

NO2 (μg/m3) 0.96 53.86 57.08 239.90 29.66 91

NOX (μg/m3) 2.87 308.66 387.15 2207.96 307.84 91

O3 (μg/m3) 0.0 13.0 22.9 172.4 23.8 94

PM10 (μg/m3)

(TEOM, unadjusted) 1.3 25.3 31.2 251.7 22.1 96

PM10 (μg/m3)

(TEOM, data x 1.3) 1.7 32.9 40.5 327.2 28.7 96

CH4 (mg/m3) 0.80 1.35 1.42 5.50 0.39 79

NMHC (mg/m3) 0.00 0.13 0.17 2.04 0.15 78



(veh/day) 180670 86

19

97

CO (mg/m3) 0.0 0.8 1.1 9.5 0.9 99

NO (μg/m3) 0.00 137.50 184.85 1152.50 173.32 94

NO2 (μg/m3) 0.00 48.32 49.46 213.92 28.69 94

NOX (μg/m3) 0.57 259.76 331.91 1974.94 285.16 94

O3 (μg/m3) 0.0 10.6 20.2 174.2 21.1 98

PM10 (μg/m3)

(TEOM, unadjusted) 0.9 23.3 27.0 164.4 16.6 92

PM10 (μg/m3)

(TEOM, data x 1.3) 1.2 30.3 35.1 213.7 21.6 92

CH4 (mg/m3) 0.99 1.39 1.51 5.54 0.43 83

NMHC (mg/m3) 0.01 0.13 0.17 1.93 0.16 83

H2S (μg/m3) 0.18 10.92 13.15 55.38 10.13 34

SO2 (μg/m3) 0.00 16.97 21.99 149.97 18.18 34



182625 89




dev.

Data capture (%

of calendar

year)

19

98

CO (mg/m3) 0.0 0.4 0.6 6.9 0.6 84

NO (μg/m3) 0.00 63.75 120.56 922.50 135.92 84

NO2 (μg/m3) 1.91 36.86 38.61 159.10 23.12 84

NOX (μg/m3) 2.48 135.61 222.82 1503.17 224.88 84

O3 (μg/m3) 0.0 21.0 29.0 176.8 25.2 68

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 18.2 21.6 127.0 13.8 83


0.0 23.7 28.1 165.1 18.0 83

CH4 (mg/m3) 0.94 1.27 1.32 4.08 0.27 65

NMHC (mg/m3) 0.00 0.12 0.15 1.29 0.13 65

H2S (μg/m3) 0.00 2.67 4.46 33.91 4.35 68

SO2 (μg/m3) 0.00 8.80 12.48 102.92 11.13 68



(veh/day) 171838 15

19

99

CO (mg/m3) 0.0 0.5 0.7 4.1 0.6 82

NO (μg/m3) 0.00 101.25 150.08 958.75 152.23 82

NO2 (μg/m3) 0.96 42.02 46.49 194.44 29.12 82

NOX (μg/m3) 2.87 208.48 275.81 1470.32 245.92 82

O3 (μg/m3) 0.0 23.8 32.9 198.8 28.7 75

PM10 (μg/m3)

(TEOM, unadjusted) 0.1 19.4 22.2 116.5 13.2 82

PM10 (μg/m3)

(TEOM, data x 1.3) 0.1 25.2 28.9 151.5 17.2 82

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.0 13.1 15.4 71.9 9.2 57

CH4 (mg/m3) 0.76 1.19 1.29 5.69 0.37 78

NMHC (mg/m3) 0.01 0.12 0.14 0.95 0.10 75

H2S (μg/m3) 0.00 4.17 5.56 37.01 4.62 82

SO2 (μg/m3) 0.00 9.82 13.41 136.64 11.99 82



(veh/day) 188225 84

20

00

CO (mg/m3) 0.0 0.4 0.5 4.2 0.4 97

NO (μg/m3) 1.25 101.25 134.45 950.00 120.37 100

NO2 (μg/m3) 0.57 38.77 40.94 154.33 24.68 100

NOX (μg/m3) 4.39 197.98 246.38 1596.76 201.54 100

O3 (μg/m3) 0.0 18.4 25.1 95.8 22.2 100

PM10 (μg/m3)

(TEOM, unadjusted) 0.4 18.4 21.2 135.0 12.4 94

PM10 (μg/m3)

(TEOM, data x 1.3) 0.5 23.9 27.6 175.5 16.1 94

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.3 12.2 14.4 91.3 8.9 100

CH4 (mg/m3) 1.02 1.38 1.44 3.56 0.22 33

NMHC (mg/m3) 0.00 0.06 0.08 0.42 0.06 33

H2S (μg/m3) 0.00 3.69 4.76 28.40 3.54 50

SO2 (μg/m3) 0.00 8.78 10.93 69.16 7.90 100



(veh/day) 184466 86




dev.

Data capture (%

of calendar

year)

20

01

CO (mg/m3) 0.0 0.6 0.7 4.0 0.5 96

NO (μg/m3) 0.00 65.00 102.08 636.25 104.66 98

NO2 (μg/m3) 0.57 36.29 39.72 152.42 25.78 98

NOX (μg/m3) 0.00 138.09 195.56 1078.77 179.62 98

O3 (μg/m3) 0.0 19.0 25.4 141.2 23.6 98

PM10 (μg/m3)

(TEOM, unadjusted) 0.1 17.1 21.0 193.3 14.4 91

PM10 (μg/m3)

(TEOM, data x 1.3) 0.1 22.2 27.3 251.3 18.8 91

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.1 10.7 13.6 176.6 10.5 91

CH4 (mg/m3) 1.10 1.40 1.47 4.52 0.27 57

NMHC (mg/m3) 0.00 0.04 0.06 0.53 0.06 56

H2S (μg/m3) 0.00 3.83 4.65 21.73 3.31 75

SO2 (μg/m3) 0.00 8.25 10.55 79.53 8.71 75



(veh/day) 185733 94

20

02

CO (mg/m3) 0.0 0.70 0.8 3.0 0.4 92

NO (μg/m3) 0.00 69.07 102.60 632.39 101.95 96

NO2 (μg/m3) 1.00 35.10 39.07 150.91 24.05 96

NOX (μg/m3) 2.95 145.14 195.82 1003.40 173.15 96

O3 (μg/m3) 0.3 18.6 26.8 117.3 24.3 97

PM10 (μg/m3)

(TEOM, unadjusted) 0.1 19.4 23.0 143.1 14.1 83

PM10 (μg/m3)

(TEOM, data x 1.3) 0.1 25.3 30.0 186.0 18.3 83

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.0 10.3 12.5 63.1 7.9 97

CH4 (mg/m3) 1.13 1.36 1.43 4.40 0.25 88

NMHC (mg/m3) 0.00 0.04 0.06 0.61 0.06 88

H2S (μg/m3) 0.00 3.64 4.34 18.34 2.77 95

SO2 (μg/m3) 0.00 9.81 11.32 67.75 7.17 96



(veh/day) 188543 96

20

03

CO (mg/m3) 0.0 0.7 0.8 4.3 0.5 94

NO (μg/m3) 0.00 75.00 100.96 672.50 95.30 94

NO2 (μg/m3) 0.96 51.57 54.56 195.78 32.29 94

NOX (μg/m3) 5.16 172.19 208.82 1186.11 170.64 94

O3 (μg/m3) 0.8 14.0 23.1 142.6 22.5 94

PM10 (μg/m3)

(TEOM, unadjusted) 0.8 18.0 21.2 126.8 13.4 89


1.0 23.4 27.6 164.8 17.4 89

PM2.5 (μg/m3) (TEOM, unadjusted)

0.3 12.6 15.3 84.8 10.2 78

CH4 (mg/m3) 1.14 1.41 1.47 4.76 0.28 85

NMHC (mg/m3) 0.00 0.06 0.08 0.93 0.07 88

H2S (μg/m3) 0.14 5.11 5.46 20.45 2.84 94

SO2 (μg/m3) 0.27 10.64 13.03 104.27 9.58 94



(veh/day)

188376

81




dev.

Data capture (% of

calendar

year)

20

04

CO (mg/m3) 0.0 0.3 0.4 2.1 0.3 68

NO (μg/m3) 0.00 47.13 85.68 610.00 101.55 70

NO2 (μg/m3) 0.00 48.13 56.10 278.86 43.96 70

NOX (μg/m3) 1.34 122.24 187.13 1097.49 194.27 70

O3 (μg/m3) 0.0 19.6 23.4 94.8 19.9 66

PM10 (μg/m3) (TEOM, unadjusted)

0.1 17.0 21.6 178.7 15.7 55

PM10 (μg/m3)

(TEOM, data x 1.3) 0.1 22.1 28.1 232.2 20.4 55

PM2.5 (μg/m3) (TEOM, unadjusted)

0.2 13.4 16.8 170.0 11.9 66

CH4 (mg/m3) 0.90 1.30 1.35 3.97 0.27 44

NMHC (mg/m3) 0..00 0.09 0.12 1.06 0.10 39

H2S (μg/m3) 0.14 4.83 5.41 23.57 3.16 55

SO2 (μg/m3) 0.27 10.64 12.14 58.52 7.59 56



187872 98

20

05

CO (mg/m3) 0.0 0.2 0.3 1.9 0.2 98

NO (μg/m3) 0.00 48.96 74.10 516.96 73.53 93

NO2 (μg/m3) 1.45 37.80 42.70 162.10 26.13 93

NOX (μg/m3) 3.30 114.38 155.94 936.72 132.05 93

O3 (μg/m3) 0.3 14.9 20.2 80.2 18.3 50


1.2 15.4 18.2 129.7 11.2 92

PM10 (μg/m3)

(TEOM, data x 1.3) 1.5 20.0 23.6 168.6 14.5 92

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.7 9.9 12.0 73.8 7.7 90

CH4 (mg/m3) 1.14 1.35 1.40 3.61 0.20 87

NMHC (mg/m3) 0.00 0.06 0.08 0.60 0.07 87

H2S (μg/m3) 0.21 9.95 10.71 34.39 5.12 99

SO2 (μg/m3) 0.50 15.20 15.91 52.00 7.05 93

NH3 (μg/m3) 0.12 6.19 6.77 28.75 3.76 75



(veh/day) 191219 72




dev.

Data capture

(% of

calendar

year)

20

06

CO (mg/m3) 0.0 0.2 0.3 1.6 0.2 100

NO (μg/m3) 0.69 47.13 72.03 614.58 76.73 100

NO2 (μg/m3) 0.70 55.70 59.33 269.43 39.41 100

NOX (μg/m3) 3.16 131.96 169.39 1062.64 150.86 100

O3 (μg/m3) 0.1 21.5 27.1 112.9 23.2 100

PM10 (μg/m3)

(TEOM, unadjusted) 2.0 20.2 22.6 259.5 13.3 99

PM10 (μg/m3)

(TEOM, data x 1.3) 2.6 26.2 29.4 337.4 17.3 99

PM2.5 (μg/m3)

(TEOM, unadjusted) 1.1 12.9 14.7 107.7 8.2 93

CH4 (mg/m3) 1.24 1.46 1.50 3.11 0.18 66

NMHC (mg/m3) 0.00 0.04 0.05 0.63 0.03 66

H2S (μg/m3) 0.00 3.00 3.71 20.86 3.05 100

SO2 (μg/m3) 0.00 6.40 7.40 64.50 5.97 99

NH3 (μg/m3) 0.05 10.48 10.80 48.68 6.41 61




20

07

CO (mg/m3) 0.0 0.2 0.3 2.8 0.3 100

NO (μg/m3) 0.25 50.22 79.89 878.38 91.19 100

NO2 (μg/m3) 1.36 51.70 57.32 319.26 40.63 99

NOX (μg/m3) 2.81 130.68 179.69 1622.09 175.71 99

O3 (μg/m3) 0.1 18.2 23.2 90.9 19.7 99

PM10 (μg/m3)

(TEOM, unadjusted) 1.1 19.2 21.7 136.2 12.9 98

PM10 (μg/m3)

(TEOM, data x 1.3) 1.4 24.9 28.3 177.1 16.7 98

PM10 (μg/m3)

(VCM adjusted) 0.14 20.79 24.89 155.82 17.23 98

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.9 13.2 15.3 71.8 9.1 99

CH4 (mg/m3) 1.20 1.43 1.52 3.72 0.29 53

NMHC (mg/m3) 0.00 0.05 0.07 1.05 0.09 53

H2S (μg/m3) 0.00 2.02 3.03 36.98 3.33 99

SO2 (μg/m3) 0.10 3.40 5.19 48.00 5.35 99







dev.

Data capture

(% of

calendar

year)

20

08

CO (mg/m3) 0.01 0.17 0.22 1.34 0.18 98

NO (μg/m3) 0.01 54.77 102.63 938.73 120.62 96

NO2 (μg/m3) 0.40 41.33 52.36 228.08 42.24 96

NOX (μg/m3) 1.76 97.34 155.05 1156.92 158.68 96

O3 (μg/m3) 0.63 24.90 29.56 112.67 22.17 98


1.26 17.14 20.20 159.65 12.12 97


1.63 22.28 26.30 207.55 15.76 97

PM10 (μg/m3)

(VCM) 5.3 18.6 23.2 80.4 13.8 95

PM2.5 (μg/m3)

(TEOM) 0.46 12.42 14.92 130.12 8.95 96

PM10 (μg/m3) (Partisol) 5.21 19.94 24.48 82.88 14.80 75

CH4 (mg/m3) 0.3 1.2 1.2 5.3 0.3 91

H2S (μg/m3) 0.0 2.4 3.2 18.0 2.5 97

SO2 (μg/m3) 0.06 3.00 4.50 85.20 4.65 98




20

09

CO (mg/m3) 0.00 0.27 0.30 1.57 0.16 98

NO (μg/m3) 0.61 61.85 100.81 839.14 108.70 98

NO2 (μg/m3) 1.26 50.17 57.03 231.90 42.16 98

NOX (μg/m3) 3.70 112.78 157.84 1026.94 147.38 98

O3 (μg/m3) 0.27 24.42 28.70 104.38 22.23 98

PM10 (μg/m3)

(TEOM, unadjusted) 0.69 17.67 20.10 230.94 12.05 98


0.90 22.97 26.13 300.22 15.67 98

PM10 (μg/m3) (VCM)

0.09 20.51 23.90 253.91 15.12 98

PM2.5 (μg/m3)

(TEOM) 0.02 12.21 13.88 67.18 7.28 96

CH4 (mg/m3) 0.02 0.89 0.95 4.09 0.31 95

H2S (μg/m3) 0.00 2.14 2.70 15.60 2.08 98

SO2 (μg/m3) 0.04 2.85 3.95 33.11 3.39 98



traffic (veh/day) 200783





Data capture

(% of

calendar year)

19

99

(M

ay t

o D

ec)

CO (mg/m3) 0.0 0.3 0.4 4.2 0.4 57

NO (μg/m3) 0.00 38.75 67.29 802.50 78.20 57

NO2 (μg/m3) 0.38 41.26 41.58 148.79 19.46 57

NOX (μg/m3) 2.67 105.05 144.00 1332.99 129.44 57

O3 (μg/m3) 1.6 20.0 26.7 194.8 25.1 53

PM10 (μg/m3)

(TEOM, unadjusted) 0.9 15.3 17.4 80.4 9.6 35

PM10 (μg/m3)

(TEOM, data x 1.3) 1.2 19.9 22.6 104.5 12.4 35

20

00

CO (mg/m3) 0.0 0.4 0.6 6.0 0.5 56

NO (μg/m3) 0.00 36.25 58.57 555.00 64.64 85

NO2 (μg/m3) 0.96 42.78 44.05 137.71 19.58 85

NOX (μg/m3) 1.72 100.47 133.68 985.37 111.85 85

O3 (μg/m3) 0.0 21.6 26.7 150.8 21.8 94

PM10 (μg/m3)

(TEOM, unadjusted) 0.2 14.2 16.5 137.7 10.3 72

PM10 (μg/m3)

(TEOM, data x 1.3) 0.3 18.5 21.4 179.0 13.4 72



135428 57

20

01

CO (mg/m3) 0.0 0.5 0.5 3.8 0.3 83

NO (μg/m3) 0.00 37.50 67.91 1032.50 89.41 91

NO2 (μg/m3) 0.57 36.48 37.68 126.06 18.42 91

NOX (μg/m3) 0.96 95.12 141.45 1693.41 148.50 91

O3 (μg/m3) 0.0 18.2 23.2 147.0 20.5 95

PM10 (μg/m3)

(TEOM, unadjusted) 1.6 16.1 18.4 131.6 11.0 68


2.1 20.9 23.9 171.1 14.3 68




20

02

CO (mg/m3) 0.00 0.30 0.39 3.40 0.29 90

NO (μg/m3) 0.00 30.81 56.77 895.36 70.09 98

NO2 (μg/m3) 0.17 41.69 42.51 163.79 21.25 98

NOX (μg/m3) 4.20 90.61 129.25 1519.80 121.86 98

O3 (μg/m3) 0.1 21.7 26.0 134.4 21.4 95


0.3 17.1 19.0 139.8 10.1 99

PM10 (μg/m3)

(TEOM, data x 1.3) 0.3 22.2 24.6 181.8 13.2 99



134377 69



Pollutant Min. Med. Avg. Max. Std. dev. Data capture

(% of calendar

year)

20

03

CO (mg/m3) 0.0 0.3 0.4 4.7 0.4 96

NO (μg/m3) 0.00 31.05 62.08 833.62 83.16 98

NO2 (μg/m3) 2.97 52.17 53.57 176.42 25.55 98

NOX (μg/m3) 7.17 100.86 148.43 1416.79 145.49 98

O3 (μg/m3) 0.2 27.2 33.6 207.8 29.1 91

CH4 (mg/m3) 1.14 1.30 1.41 2.98 0.31 8

NMHC (mg/m3) 0.00 0.07 0.10 0.69 0.10 8

H2S (μg/m3) 0.25 4.03 5.94 34.78 5.55 15

SO2 (μg/m3) 0.00 6.58 9.02 50.57 7.26 15

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 23.1 27 141.8 17.5 80

PM10 (μg/m3)

(TEOM, data x 1.3) 0.0 30.0 35.0 184.3 22.8 80

Total traffic (veh/hr) 342 5946 5626 14174 1987.7 39



20

04

CO (mg/m3) 0.0 0.3 0.4 3.6 0.3 97

NO (μg/m3) 0.00 30.07 50.46 683.25 57.73 87

NO2 (μg/m3) 0.57 46.99 48.94 201.70 24.41 87

NOX (μg/m3) 0.76 95.12 126.04 1245.70 107.79 87

O3 (μg/m3) 0.0 24.4 28.6 158.8 23.1 91

CH4 (mg/m3) 1.10 1.50 2.53 7.40 1.52 71

NMHC (mg/m3) 0.00 0.06 0.08 0.64 0.07 57

H2S (μg/m3) 0.00 6.39 7.20 34.51 4.26 85

SO2 (μg/m3) 0.27 10.64 11.22 89.38 6.17 78

PM10 (μg/m3)

(TEOM, unadjusted) 0.1 17.9 19.9 87.8 10.6 93

PM10 (μg/m3)

(TEOM, data x 1.3) 0.1 23.3 25.9 114.1 13.7 93

Total traffic

(veh/hr) 397 6538 6064 14062 4159 43

Annual average

daily traffic

(veh/day)

145290 43



Pollutant Min. Med. Avg. Max. Std. dev. Data capture (%

of calendar

year)

20

05

CO (mg/m3) 0.0 0.2 0.3 4.8 0.3 98

NO (μg/m3) 0.50 27.20 51.11 768.41 65.15 97

NO2 (μg/m3) 0.59 42.90 46.10 229.87 24.32 97

NOX (μg/m3) 2.62 84.94 124.20 1373.63 119.73 97

O3 (μg/m3) 0.0 22.2 27.4 125.0 22.8 85

CH4 (mg/m3) 1.14 1.37 1.41 3.39 0.18 86

NMHC (mg/m3) 0.01 0.07 0.07 0.37 0.03 75

H2S (μg/m3) 0.00 5.68 6.34 41.73 4.21 74

SO2 (μg/m3) 0.00 7.85 8.34 51.84 5.76 78

PM10 (μg/m3)

(TEOM, unadjusted) 0.1 19.3 21.2 126.8 11.0 98

PM10 (μg/m3)

(TEOM, data x 1.3) 0.1 25.0 27.6 164.9 14.2 98

PM10 (μg/m3)

(Partisol) 1.9 23.3 29.5 386.4 41.2 47

PM2.5 (μg/m3) Partisol 0.0 14.2 20.4 374.4 40.1 47

Total traffic (veh/hr)

145 4305 5171 14413 4066 98

Annual average

daily traffic

(veh/day)

- - 122467 - - 98

20

06

CO (mg/m3) 0.0 0.3 0.4 3.3 0.3 98

NO (μg/m3) 0.00 21.88 41.64 530.42 51.08 87

NO2 (μg/m3) 0.00 40.93 45.26 184.63 25.94 87

NOX (μg/m3) 0.00 87.67 108.85 963.47 94.76 87

O3 (μg/m3) 0.0 22.8 27.0 162.0 23.0 98

CH4 (mg/m3) 1.02 1.38 1.45 6.27 0.26 85

NMHC (mg/m3) 0.00 0.06 0.06 0.84 0.04 85

H2S (μg/m3) 0.00 3.37 4.24 29.43 3.23 76

SO2 (μg/m3) 0.00 6.84 7.90 96.12 5.47 82


0.3 18.5 21.3 129.3 12.3 97

PM10 (μg/m3)

(TEOM, data x 1.3) 0.3 24.1 24.7 168.1 16.0 97

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.1 9.9 11.9 122.8 8.4 93

PM10 (μg/m3)

(Partisol) 5.6 18.4 21.2 142.4 12.0 94

PM2.5 (μg/m3)

(Partisol) 0.0 10.5 13.0 67.2 8.5 94

Total traffic

(veh/hr) 152 6786 6363 14841 4339 90

Annual average

daily traffic

(veh/day)

144658 90




20

07

CO (mg/m3) 0.0 0.3 0.4 2.9 0.2 99

NO (μg/m3) 0.00 35.73 58.98 705.70 70.12 80

NO2 (μg/m3) 0.26 47.54 51.49 299.70 31.51 80

NOX (μg/m3) 1.06 104.34 141.64 1314.34 133.72 80

O3 (μg/m3) 0.0 17.4 21.5 117.6 18.3 99

CH4 (mg/m3) 1.11 1.38 1.45 3.54 0.22 81

NMHC (mg/m3) 0.00 0.05 0.06 0.52 0.05 81

H2S (μg/m3) 0.00 3.42 4.22 28.27 2.95 71

SO2 (μg/m3) 0.00 5.09 6.02 47.19 4.25 87

PM10 (μg/m3)

(TEOM, unadjusted) 0.0 18.3 20.7 229.8 12.6 93

PM10 (μg/m3)

(TEOM, data x 1.3) 0.0 23.7 26.9 298.8 16.4 93

PM10 (μg/m3)

(VCM adjusted) 0.03 18.66 22.55 243.66 16.48 76

PM2.5 (μg/m3)

(TEOM, unadjusted) 0.0 10.9 13.2 207.3 9.9 92

PM10 (μg/m3)

(Partisol) 3.0 19.0 22.6 116.3 14.2 65

PM2.5 (μg/m3)

(Partisol) 1.6 10.9 13.6 86.7 9.5 65



155720 84

20

08

CO (mg/m3) 0.02 0.32 0.36 2.02 0.22 98

NO (μg/m3) 0.01 53.41 80.01 1232.20 94.65 97

NO2 (μg/m3) 0.01 41.98 44.56 187.50 25.05 97

NOX (μg/m3) 0.48 79.09 115.84 1380.08 123.35 97

O3 (μg/m3) 1.81 28.74 32.19 114.68 20.21 94

CH4 (mg/m3) 1.06 1.50 1.57 4.42 0.28 94

NMHC (mg/m3) 0.00 0.07 0.10 0.73 0.09 83

H2S (μg/m3) 0.00 4.95 5.71 35.92 3.85 95

SO2 (μg/m3) 0.00 3.51 4.09 34.62 3.51 96

PM10 (μg/m3)

(TEOM, unadjusted) 0.13 15.81 17.71 145.88 10.49 97

PM10 (μg/m3)

(TEOM, data x 1.3) 0.16 20.56 22.91 189.64 13.64 97

PM10 (μg/m3)

(VCM) 5.5 17.4 20.0 104.8 11.5 95

PM2.5 (μg/m3)

(TEOM) 0.06 9.44 10.72 130.75 6.91 98

PM10 (μg/m3)

(Partisol) 5.87 20.56 23.65 91.68 13.06 63

PM2.5 (μg/m3)

(Partisol) 1.44 10.60 13.52 70.56 9.64 63







20

09

CO (mg/m3) 0.00 0.29 0.33 1.90 0.20 100

NO (μg/m3) 0.00 26.72 54.68 867.89 72.87 99

NO2 (μg/m3) 0.55 41.97 44.79 178.99 25.11 99

NOX (μg/m3) 0.57 69.86 99.48 1046.88 93.51 99

O3 (μg/m3) 0.61 29.13 36.76 172.99 30.97 100

CH4 (mg/m3) 0.01 1.50 1.55 4.30 0.29 98

NMHC (mg/m3) 0.01 0.08 0.09 0.87 0.06 98

H2S (μg/m3) 0.00 5.07 6.48 187.38 5.50 99

SO2 (μg/m3) 0.00 4.67 5.93 37.42 4.30 94

PM10 (μg/m3)

(TEOM, unadjusted) 0.00 13.63 15.24 161.75 8.51 99

PM10 (μg/m3)

(TEOM, data x 1.3) 0.00 17.71 19.81 210.28 11.06 99

PM10 (μg/m3)

(VCM) 0.12 15.96 18.48 154.87 11.17 99

PM2.5 (μg/m3)

(TEOM) 0.00 12.13 13.09 105.69 6.47 99



traffic (veh/day) 159226



8 Historical traffic flow summary statistics

8.1: M4 traffic characteristics

Year M4

AAHT AADT %change in AADT Data capture (%)

1993 3950 94782 n/a 17

1994 n/a n/a n/a n/a

1995 3763 94704 n/a 15

1996 4101 98417 3.9 69

1997 4326 103718 5.4 69

1998 4464 107019 3.2 31

1999 4403 105804 -1.1 25

2000 4670 112033 5.9 53

2001 4739 113662 1.5 88

2002 4794 114974 1.2 76

2003 4768 114425 -0.5 92

2004 4718 113215 -1.1 63

2005 4915 117962 4.2 79

2006 4859 116573 -1.2 84

2007 4843 116565 -0.01 40

2008 4889 117334 0.7 54

2009 4522 108516 -7.5 71

Average 4545 109356 n/a n/a

8.2: Bell Common traffic characteristics

Year Bell Common


2007 5063 121507 n/a 98

2008 5289 126929 4.5 n/a

2009 - - - -



Year M25


1995 7511 180368 n/a 44

1996 7530 180670 0.2 86

1997 7647 182625 1.1 89

1998 7208 171838 -5.9 15

1999 7844 188225 9.5 84

2000 7760 184466 -2 86

2001 7802 185733 0.7 94

2002 7920 188543 1.5 96

2003 7856 188377 -0.1 81

2004 7828 187872 -0.3 98

2005 7967 191219 1.8 72

2006 8007 192030 0.4 88

2007 8290 198958 3.5 91

2008 8355 200525 0.8 100

2009 8366 200783 0.1 86





Year M60


2000 5693 135428 n/a 57

2001 5503 131184 -3.1 75

2002 5676 134377 2.4 69

2003 5626 134559 0.1 39

2004 6064 145290 8.0 43

2005 5171 122467 -15.7 98

2006 6363 144658 18.1 90

2007 6489 155720 7.5 84

2008 6474 152739 -1.8 95

2009 6636 159266 4.3 71


Documents

2009 volume II - Cloud Object Storage | Store & …...Figure 3.10: M25 (B) 15-minute mean concentration of sulphur dioxide October 2009 . 55 Figure 3.11: M25 (B) 15-minute mean concentration