Sample

No.

²²⁶Ra (Bq∙kg⁻¹)

²³²Th (Bq∙kg⁻¹)

⁴⁰K (Bq∙kg⁻¹)

Mean ± Std. Dev

Range

Mean ± Std. Dev

Range

Mean ± Std. Dev

Range

Coarse fly ash

10

28.2 ± 8.3

18.1 - 38.8

37.6 ± 5.0

31.6 - 44.7

335 ± 32

287 - 385

Soil (10 m)

10

32.7 ± 4.3

26.3 - 38.4

40.0 ± 4.2

32.1 - 46.6

298 ± 15

278 - 324

Soil (100 m)

10

39.1 ± 11.2

14.6 - 52.4

34.1 ± 5.2

25.2 - 40.2

257 ± 19

223 - 286