Environmental Engineering Reference
In-Depth Information
1°39'W
N
A
B
C
H
53°20'N
E
J
School
Pool
I
F
D
G
K
Station
Au
Pt
Pd
Rh
1
2
,3
4
Ir
Ru
5
Road A 6187
High precious metal value
Minor road
Medium precious metal value
Minor stream
Low precious metal value
River Noe
Samples:- roads A-K, streams 1-5
200m contour
Built up areas
Scale
500 m
Fig. 2
Precious metal distribution in Hathersage.
Circles
correspond to average concentrations of
Au, Pt, Pd, Rh and Ru for the three road dust samples taken in winter 2005, summer and winter
2006. Ir values are for winter 2005. Au values are low 0-20 ppb, medium 21-40 ppb and high
41-55 ppb. Pt values are low 0-30 ppb, medium 31-60 ppb and high 61-67 ppb. Pd values are
low 0-40 ppb, medium 41-90 ppb and high 91-195 ppb. Rh values are low 0-9 ppb, medium
10-20 ppb and high 21-26 ppb. Ru values are low 0-5 ppb, medium 6-10 ppb and high 11-15
ppb. Ir values are low 0 ppb, medium 1-9 ppb and high 10-22 ppb. Zero (0) is taken as values
below detection limit
The samples collected in winter 2005 were analyzed at Genalysis laboratories in
Western Australia and the subsequent analyses of samples collected in 2006 were
analyzed by Ultratrace, also in Western Australia. Standards AMIS-0002 and
SARM65 were analyzed with the samples and measured values are consistent with
the certified values. Internal standards, blanks and repeats of samples were also run
and gave confidence in the sample values.