Appendix 1: Concentrations of uranium in stream sediments, stream waters
Percentile ppb
Examples show the distribution of uranium in over 100,000 samples of stream sediment and 50,000 samples of stream water at a typical resolution of 1 sample per 2.5 km 2 (sediments). These data clearly show the linkage between geological features

such as granitic rocks and elevated concentrations in stream sediment

and the lack of spatial correlation between concentrations in stream waters and stream sediments, due to differences in uranium mobility resulting from changes in uranium mineralisation and water chemistry. Licensed discharges from Springfield and Capenhurst can also be clearly identified.
Appendix 2: Isotopic analysis of uranium from areas surrounding Springfields and
Capenhurst
36000
34000
32000
30000
28000
26000
24000
22000
20000
18000
16000
14000
12000
10000
8000
6000
4000
2000
0
0
Fuel cycle U
Springfields
Stream Sediment
Capenhurst
Stream Sedment
Capenhurst
Soil
Drigg
Stream Sediment
Nat. U @ equilm.
10 20 30 40 50 60 70 80
238/235 U
90 100 110 120 130 140 150
A bi-variate plot of uranium isotopic ratios in stream sediment samples from N.E. England. The diagram shows samples from natural and industrial sites with anomalously high uranium concentrations have a natural fixed 238/235 U ratio but natural variable 238/234 U ratio. But samples associated geographically with nuclear processing sites follow a mixed array between natural and fuel cycle compositions.