Environmental Engineering Reference
In-Depth Information
Functional form and percentage changes in dissolution of lead in pipes
1.2
% change between 2
points remain the same
despite functional form
1
0.8
Linear
0.6
Non-Linear
0.4
0.2
0
30 min
6 hour
Stagnation Times
Fig. 11.8 Functional form of lead dissolution and percentage change between two points
Samples >10
µ
g due to pH and stagnation adjustments (stag
based on all of Ottawa data)
250
231
200
179
150
100
52
50
0
No of samples >10
µ
g /L before adjustments
No of samples >10
g /L due to adjustments
Total samples above 10
µ
µ
g/L
Fig. 11.9 Number of samples greater than 10
g/L after pH and stagnation adjustment for Ontario
μ
Samples >10
µ
g due to pH and stagnation adjustments (stag based
Ottawa Spring data)
300
253
250
201
200
150
100
52
50
0
No of samples >10
µ
g /L before adjustments
No of samples >10
µ
g /L due to adjustments
Total samples above 10
µ
g /L
1
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