Potential chemical impacts of CO2 leakage on underground source of drinking water assessed by quantitative risk analysis

Results indicate that the leakage rate would most likely range between 10−14-10−10 kg/(m2 year) for typical and likely leakage pathway permeability ranges. Within this range of CO2 leakage rate, groundwater quality is not likely to be significantly impacted. The worst-case scenario yields trace metal concentrations approximately twice as much as the initial value, but these predicted concentrations are still less than one-fifth of regulation-stipulated maximum contamination levels and do not exceed the no-impact thresholds. Finally, the results of this analysis suggest that pH may be an effective geochemical indicator of CO2 leakage.