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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: Environ Res. 2019 Oct 17;180:108831. doi: 10.1016/j.envres.2019.108831

Table 2:

SET facility pollution concentrations compared to target levels of fine particulate matter

Treatment
Control LPG Gasifier Fan rocket Rocket elbow Three stone fire
Fine particulate matter target concentration
0 μg/m3 10 μg/m3 35 μg/m3 100 μg/m3 250 μg/m3 500 μg/m3
Participants with completed treatment, n 47 45 44 44 45 47
Mean (sd) PM2.5 concentration, μg/m3 1 (2) 8 (3) 46 (9) 95 (9) 254 (9) 462 (41)
Mean difference from target level, μg/m3 1 −2 11 −5 4 −38
Maximum difference from target level, μg/m3 9 7 42 23 26 133
Mean percent difference from target level, % −18 31 −5 2 −8
Mean (sd) CO mixing ratio*, ppm 2 (2) 3 (1) 5 (3) 8 (2) 6 (2) 9 (4)

SET = Simulated Environmental Testing; LPG = liquefied petroleum gas; sd = standard deviation; CO = carbon monoxide

*

CO did not have a target level. This row is showing the measured mean CO mixing ratio for each treatment.