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APPENDIX
Carbon Monoxide:
Current World Health Organisation recommended maximum exposure
levels to Carbon Monoxide:
15 minutes
89ppm
= 100mg/m
3
30 minutes
53ppm
= 60mg/m
3
60 minutes
27ppm
= 30mg/m
3
8 hours
9ppm
= 10mg/m
3
Carbon Dioxide:
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
2
:
NOAA observatory
(US. National Oceanic and Atmospheric Administration)
http://www.cmdl.noaa.gov/ccgg/insitu.html
http://www.cmdl.noaa.gov/ccgg/iadv/