Table A6. CIRPAS Twin Otter Flights Flight Number Flight Description Date in 2006 1 Parish power plant plume 21 Aug 2 Parish power plant plume 22 Aug 3 Parish power plant plume 23 Aug 4 Houston Ship Channel area 25 Aug 5 Conroe area 26 Aug 6 Beaumont area 27 Aug 7 Baytown area 28 Aug 8 Baytown area 28 Aug 9 Parish power plant plume 29 Aug 10 Houston Ship Channel area 31 Aug 11 Houston Ship Channel area 1 Sep 12 Biomass burning 2 Sep 13 Houston area 3 Sep 14 Parish power plant plume 4 Sep 15 Waste treatment plant area 6 Sep 16 Galveston area 7 Sep 17 Parish power plant plume 8 Sep 18 Houston area 10 Sep 19 Fayetteville power plant plume 11 Sep 20 Conroe area 13 Sep 21 Houston area 14 Sep 22 Houston area 15 Sep