23 May 2008
Second part of the answer
•“Whilst mass balance is probably the most accurate way to measure emissions, it is also complex and hence expensive.
Some of the facilities that you are
interested in may have used a mass balance measurement, but the NPI does not record the method used.
You can find out the method employed
by contacting each facilities 'public
contact' officer, whose contact details will appear on the facilities data sheet”.