Table 3.

Results on ^239+240Pu and ²³⁸Pu activity concentrations for second set of samples (calculated for summer 2001)

	Layer depth (contracted) (cm)	Recovery (%)	239+240Pu (mBq/kg)	238Pu (mBq/kg)	239+240Pu (Bq/m2)
Białe Wigierskie	0–2	78 ± 4	662 ± 75	29 ± 12	7.0 ± 0.8
Białe Wigierskie	2–4	89 ± 4	1118 ± 103	30 ± 10	12.0 ± 1.1
Gaładuś	0–2	74 ± 4	150 ± 25	23 ± 11	3.6 ± 0.6
Gaładuś	2–4	> 93	157 ± 18	< 12	3.6 ± 0.4
Gaładuś	4–6	> 99	172 ± 19	17 ± 6	3.8 ± 0.4
Garbaś	0–2	15 ± 1	480 ± 98	< 26	4.0 ± 0.8
Garbaś	2–4	94 ± 4	98 ± 13	6 ± 5	< 0.9
Garbaś	4–6	56 ± 3	13 ± 6	< 13	0.1 ± 0.1
Guzki	0–2	97 ± 5	1129 ± 99	181 ± 23	12.9 ± 1.1
Guzki	2–4	111 ± 6	1079 ± 94	39 ± 12	13.2 ± 1.1
Guzki	4–6	97 ± 6	722 ± 76	< 106	9.0 ± 0.9
Płaskie	0–2	> 98	812 ± 82	27 ± 12	7.1 ± 0.7
Płaskie	2–4	111 ± 9	226 ± 46	10 ± 10	1.7 ± 0.4
Płaskie	4–6	79 ± 4	29 ± 11	8 ± 8	0.2 ± 0.1
Rogale Duże	0–2	64 ± 5	3668 ± 348	166 ± 43	43.4 ± 4.1
Rogale Duże	2–4	72 ± 5	177 ± 37	16 ± 10	2.5 ± 0.5
Rogale Duże	4–6	80 ± 5	1381 ± 128	12 ± 7	19.5 ± 1.8
Rogale Duże	6–8	89 ± 5	9 ± 7	< 2	0.1 ± 0.1
Sawinda Wielka	0–2	86 ± 6	1276 ± 130	48 ± 15	9.4 ± 1.0
Sawinda Wielka	2–4	> 96	613 ± 61	54 ± 13	5.0 ± 0.5
Sumowo	0–2	116 ± 7	893 ± 95	33 ± 10	7.1 ± 0.8
Sumowo	2–4	> 98	1369 ± 110	35 ± 10	11.7 ± 0.9
Sumowo	4–6	93 ± 4	1691 ± 120	48 ± 13	14.0 ± 1.0
Toczyłowo	0–2	99 ± 5	95 ± 18	9 ± 6	1.8 ± 0.3
Toczyłowo	2–4	88 ± 5	142 ± 31	12 ± 19	2.7 ± 0.6
Toczyłowo	4–6	92 ± 5	141 ± 22	< 14	2.7 ± 0.4
Zawadzkie	0–2	90 ± 4	21 ± 7	11 ± 9	0.4 ± 0.1
Zawadzkie	2–4	93 ± 7	32 ± 9	12 ± 7	0.6 ± 0.2
Zawadzkie	4–6	60 ± 3	102 ± 18	< 3	1.9 ± 0.3
IAEA 300*		99 ± 7	3400 ± 320	141 ± 53

The last row contains results for the Reference Material IAEA 300 obtained with ²⁴²Pu tracer. Uncertainties are 1σ counting statistic only

*Baltic Sea sediment, certified value [7] for ^239+240Pu is 3550 mBq/kg (range 3440–3650 mBq/kg)