Sample	Radon concentration (Bq/m³)
Sample	Exposure time (h)	Microscope	Spark counter
S1	2214	187 ± 84	184 ± 86
S2	2188	83 ± 37	90 ± 42
S3	2206	150 ± 68	130 ± 61
S4	2157	130 ± 59	98 ± 46
S5	2196	165 ± 74	176 ± 83
S6	2210	247 ± 111	257 ± 121
S7	2214	105 ± 47	111 ± 52
S8	2228	92 ± 41	96 ± 45
S9	2176	132 ± 59	101 ± 47
S10	2208	155 ± 70	134 ± 63
S11	2197	289 ± 130	291 ± 137
S12	2186	187 ± 84	218 ± 103
S13	2186	110 ± 50	119 ± 56
S14	2185	107 ± 48	109 ± 51
S15	2184	163 ± 73	144 ± 68
S16	2209	234 ± 105	260 ± 122
S17	2186	103 ± 46	88 ± 41
S18	2178	400 ± 180	419 ± 197
S19	2190	161 ± 72	135 ± 63
S20	2201	116 ± 52	93 ± 44
S21	2180	100 ± 45	86 ± 40
S22	2204	228 ± 103	233 ± 110
S23	2157	186 ± 84	158 ± 74
S24	2209	91 ± 41	81 ± 38
S25	2226	105 ± 47	85 ± 40
S26	2193	136 ± 61	117 ± 55
S27	2201	160 ± 72	172 ± 81
S28	2179	140 ± 63	125 ± 59
S29	2207	83 ± 37	92 ± 43
S30	2208	233 ± 105	188 ± 88
S31	2189	219 ± 99	146 ± 69
S32	2165	101 ± 45	105 ± 49
S33	2178	137 ± 62	117 ± 55
S34	2203	224 ± 101	188 ± 88
S35	2202	158 ± 71	134 ± 63
S36	2169	162 ± 73	139 ± 65
S37	2177	87 ± 39	69 ± 32
S38	2200	151 ± 68	161 ± 76