TableĀ 4.

Bulk gas readings during purging prior to vapour sampling

External soil vapourSub-floor vapourIndoor air samplesBackground ambient
VP1VP2VP3VP4VP5VPIG-1VPIS-1VPIS-2VP1G-AVP1S-AVPA
22 June 2015
Carbon dioxide0.630.152.081.536.570.081.42<0.05nana<0.05
Carbon monoxide<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05nana<0.05
Methane<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05nana<0.05
Nitrogen79.879.280.279.78779.48179.3nana79.1
Oxygen19.520.717.718.86.420.517.620.6nana20.9
27 January 2016
Carbon dioxide0.320.430.380.851.090.110.080.090.080.10.06
Carbon monoxide<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05
Methane<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05
Nitrogen78.979.678.979.384.779.179.179.179.179.179.1
Oxygen20.82020.819.914.220.820.820.920.820.820.8
28 January 2016
Carbon dioxide0.360.260.660.930.890.160.10.080.090.12<0.05
Carbon monoxide<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05
Methane<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05<0.05
Nitrogen78.978.87979.181.37979.179.179.279.179.1
Oxygen20.720.920.42017.920.820.820.820.720.820.8

na, not available.