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 3--Initial Evaluations ......................................................................................... 3-1
3.1 Determination of the Need for Contaminant Evaluations....................... 3-1
3.2 Identification of Relevant Pathways ....................................................... 3-2
3.2.1 Environmental Setting and General Characteristics...................... 3-2
3.2.2 CDF Design and Management Characteristics ............................. 3-3
3.2.3 Dredged Material Characteristics.................................................. 3-4
3.2.4 Identifying Relevant Pathways ..................................................... 3-4
3.3 Compilation of Information.................................................................... 3-5
3.4 Identification of Contaminants of Concern (COC)................................. 3-8
3.4.1 Need for Sediment Chemistry....................................................... 3-9
3.4.2 Characteristics of Contaminants of Concern................................. 3-9
3.4.3 Documentation of COC .............................................................. 3-11
3.5 Consideration of Prior Evaluations and Testing ................................... 3-12
3.6 Tier I Decisions .................................................................................... 3-12
4--Effluent During Disposal Operations............................................................ 4-1
4.1 General Considerations .......................................................................... 4-1
4.1.1 Effluent Processes......................................................................... 4-1
4.1.2 Method of Filling.......................................................................... 4-2
4.1.3 Regulatory Considerations............................................................ 4-3
4.1.4 Mixing Zones................................................................................ 4-3
4.1.5 Data Requirements ....................................................................... 4-4
4.1.6 CDF Design for Dredged Material Retention ............................... 4-5
4.1.7 Summary of Tiered Evaluations for Effluent ................................ 4-5
4.1.8 Sampling Requirements ................................................................ 4-7
4.2 Tier I - Initial Evaluation of Effluent...................................................... 4-7
4.3 Tier II - Water Quality Screens for Effluent ........................................... 4-7
4.3.1 Tier II Effluent Quality Screen - Assumed Total Dissolved
Release ............................................................................................ 4-8
4.3.2 Tier II - Effluent Quality Screen - Equilibrium Partitioning ......... 4-9
4.3.3 Tier II Effluent Decisions .......................................................... 4-9
4.4 Tier III Effluent Water Quality and Toxicity Evaluations .................. 4-10
4.4.1 Tier III - Effluent Total Suspended Solids Evaluation ................ 4-10
4.4.2 Tier III - Effluent Water Quality Evaluation Effluent Elutriate
Test (EET)..................................................................................... 4-11
4.4.3 SETTLE Computer-Assisted Settling Data Analysis............... 4-13
4.4.4 EFQUAL - Computer Assisted Analysis of Effluent Water
Quality........................................................................................... 4-14
4.4.5 Tier III - Effluent Elutriate - Water Quality Decision ................. 4-15
4.4.6 Tier III - Effluent Toxicity Evaluation ........................................ 4-15
4.4.7 LAT-E - Computer-Assisted Effluent Toxicity Evaluation ........ 4-16
4.4.8 Tier III - Effluent Toxicity Decision ........................................... 4-16
4.5 Tier IV - Effluent Risk Assessment...................................................... 4-17
4.5.1 Evaluation ................................................................................... 4-17
4.5.2 Tier IV Effluent Decision ........................................................... 4-17
4.6 Effluent Management Actions .............................................................. 4-17
4.7 References ............................................................................................ 4-18
5--Surface Runoff After Disposal Operations ................................................... 5-1
5.1 General Considerations .......................................................................... 5-1
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