Natural radioactivity levels in soils, rocks and water at a mining concession of Perseus gold mine and surrounding towns in Central Region of Ghana

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Table 5 Gross-α and gross-β activity concentrations (Bql⁻¹) and their corresponding committed annual effective dose in water samples from the Pits and surrounding communities

Sample location	Type of water	Activity concentration (Bql⁻¹)		Committed annual effective dose for (mSv year⁻¹)
Sample location	Type of water	Gross alpha	Gross beta	Gross alpha	Gross beta
P₁	Surface water	0.0013	0.0367	0.0003	0.0185
P₂	Surface water	0.0042	0.0430	0.0009	0.0217
P₃	Surface water	0.0011	0.0389	0.0002	0.0196
P₄	Surface water	0.0019	0.0357	0.0004	0.0180
P₅	Surface water	0.0011	0.0391	0.0002	0.0197
T₁-SW	Surface water	0.0004	0.0319	0.0001	0.0161
T₂-SW	Treated water	0.0067	0.0311	0.0015	0.0157
T₃-SW	Surface water	0.0010	0.0390	0.0002	0.0196
T₅-SW	Surface water	0.0020	0.0104	0.0004	0.0052
S₁	Surface water	0.0034	0.0310	0.0007	0.0156
T₁-GW	Ground water	0.0013	0.0314	0.0003	0.0158
T₂-GW	Ground water	0.0058	0.0392	0.0013	0.0197
T₃-GW	Ground water	0.0015	0.0243	0.0003	0.0122
T₄-GW	Ground water	0.0075	0.0354	0.0016	0.0178
R-GW₁	Ground water	0.0065	0.0452	0.0014	0.0228
R-GW₂	Ground water	0.0050	0.0289	0.0011	0.0146
Range		0.0004–0.0075	0.0104–0.0452	0.0001–0.0016	0.0052–0.0228
Average		0.0032 ± 0.0024	0.0338 ± 0.0083	0.0007 ± 0.0005	0.0170 ± 0.0042
Total average				0.0089 ± 0.0023
GSB recommended limit		0.1000	1.0000
WHO recommended limit		0.5000	1.0000