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APPENDIX
Carbon Monoxide:
Current World Health Organisation recommended maximum exposure
levels to Carbon Monoxide:
15 minutes
30 minutes
60 minutes
8 hours
Carbon Dioxide:
British Standards BS6896, BS6230 and BS5990 confirm CO
concentration should not exceed 2800ppm where people are working.
HSE Regulation EH40 sets the maximum occupational exposure limit at
5000ppm.
BSRIA recommend a maximum of 800ppm over an eight hour time
weighted average.
ASHRAE (62/99) recommends a maximum level of 1000ppm.
Data on ambient CO
NOAA observatory
(US. National Oceanic and Atmospheric Administration)
http://www.cmdl.noaa.gov/ccgg/insitu.html
http://www.cmdl.noaa.gov/ccgg/iadv/
Page 41
89ppm
=
53ppm
=
27ppm
=
9ppm
=
:
2
3
100mg/m
3
60mg/m
3
30mg/m
3
10mg/m
2
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