Table 2 Parameters for periodic injections of soil gas into the chamber (computed based on the theory developed, Eq. 12c).
Soil gas pump ON/OFF ratio, R | Total removal rate | Effective soil gas concentration, S0 (kBq m−3) | Concentration to be maintained in the chamber, C0 (kBq m−3) | Period of the pumping cycle, T (min) | Duration of pumping, T1 (min) | Non-pumping duration, T2 (min) | ||
|---|---|---|---|---|---|---|---|---|
Flow ON, λON (s−1) | Flow OFF λOFF (s−1) | |||||||
R/6 | 12.70 | 2.44E−5 | 4.49E−6 | 67.63 | 8 | 60 | 4 | 56 |
R/4 | 19.01 | 60 | 3 | 57 | ||||
R/2 | 38.06 | 30 | 1 | 29 | ||||
R | 76.00 | 60 | 1 | 59 | ||||
2R | 152.13 | 110 | 1 | 109 | ||||
