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Just published: BS8485:2015 Code of practice for the design of protective measures for methane and carbon dioxide ground gases for new buildings Scope This British Standard gives recommendations on ground gas site characterization and the choice of solutions for the design of integral gas protective measures for new buildings to prevent entry of carbon dioxide and methane, and provide a safe internal environment. This British Standard gives a process that can be used to demonstrate that risks posed by the potential or actual presence of carbon dioxide and methane have been addressed. This British Standard does not cover protection of new buildings against other hazardous ground gases. Nor does this British Standard cover protection of buildings into which methane and carbon dioxide might be introduced by the activities for which they are used (for example, water pumping stations). The retrospective design of protection measures for completed buildings and the design of retrospective protection measures after completion of building construction are not covered in this British Standard. ------------ The new standard is available from the BSI Bookshop. A discount on the list price is available for local authority and other regulators (see BSI web-site) similar to that for BS 10175 and BS 8576. This is a major revision of the previous version of BS 8576. Whilst the underlying approach is the same it requires a more rigorous approach to assessment, reporting and verification of installed protective measures. Schemes that meet the requirement of the old version will not necessarily be in conformity with the new standard. +++++++++++++++++++++++++ Mike Smith M A Smith Environmental Consultancy Farthing Hill Browns Springs Potten End BERKHAMSTED HP4 2SQ 01442-872968 07961-312790 [log in to unmask] www.masmithenvironmental.co.uk