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Page Title:
Figure 5-2. Flowchart illustrating tiered evaluation approach for the runoff pathway |
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 Evaluate Existing Information
For Runoff
Tier I
Information
YES
Sufficient
For a Decision ?
Runoff
NO
Decision
COCs with No WQS or Interactive
Effects of Concern
COCs with WQS
Follow Both Pathways
as Needed
Conduct Screening Evaluations
Evaluate Initial Mixing
Tier II
Information
YES
Sufficient
For a Decision ?
Runoff
Decision
NO
Tier III
Conduct SLRP and/or RSLA Runoff Tests
SLRP = Simplified Laboratory
Conduct Water Column Toxicity
Runoff Procedure
Tests with Runoff Medium
RSLS = Rainfall Simulator/Lysimeter
System
Evaluate Initial Mixing
Evaluate Initial Mixing
Information
Runoff WQS
YES
Sufficient
Decision
For a Decision ?
Runoff Toxicity
Decision
NO
Case Specific Study
Or
Tier IV
Risk Assessment
Runoff
Decision
Figure 5-2.
Flowchart illustrating tiered evaluation approach for the runoff pathway
5-6
Chapter 5
Surface Runoff After Disposal Operations
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