Research Article
Evidence of Multiple Sources of Soil Gas in the Tangshan Fault Zone, North China
Table 3
Statistical parameters of partitioned CO2 concentrations and Rn volume activities at the mobile measurement points.
| | Population | Fraction | Mean concentration | 95% confidence interval | Mean activity | 95% confidence interval | | CO2 | Rn | CO2 (ppm) | Rn (Bq m-3) |
| | Population A | 0.80 | 0.83 | 1513 | 1491-1643 | 3894.1 | 3549.0-4240.2 | | Population B | 0.16 | 0.12 | 5415 | 5396-6109 | 10229.0 | 9655.5-10803.0 | | Population C | 0.04 | 0.05 | 8893 | 8679-9328 | 15471.0 | 14861.0-16082.0 |
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