DOE/ID-11412Revision 0

Monitoring Plan for Test Area North, Operable Unit 1-07B

August 2011

DOE/ID-11412

Revision 0

Monitoring Plan for Test Area North, Operable Unit 1-07B

Michael S. Roddy Lorie S. Cahn

August 2011

Prepared for the U.S. Department of Energy

DOE Idaho Operations Office

ABSTRACT

The final remedy for Operable Unit 1-07B is a comprehensive approach to contaminant plume remediation that combines in situ bioremediation for hot spot restoration, pump and treat for the medial zone, and monitored natural attenuation for the distal zone. The remedy assumed radionuclides would naturally attenuate without treatment through sorption and decay and selected a contingent remedy to address radionuclide migration. This document describes the rationale and sampling plans for groundwater monitoring to be conducted to ensure the three components of the remedy are functioning properly and the assumptions regarding radionuclide attenuation are valid. Data collected under this Monitoring Plan will be used to assess the progress of the remedy, determine the need for operational changes, and support Agency performance reviews. This revision of the monitoring plan also includes monitoring activities to be conducted before, during, and after an in situ bioremediation rebound test.

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CONTENTS

ABSTRACT................................................................................................................................................. iii ACRONYMS............................................................................................................................................... xi 1. INTRODUCTION...........................................................................................................................1-1

1.1 Site Background and Hydrogeology...................................................................................1-1 1.2 Remedial Action Objectives...............................................................................................1-3 1.3 Description of the Remedial Action ...................................................................................1-3

2. DATA QUALITY OBJECTIVES...................................................................................................2-1 2.1 Data Quality Objectives for In Situ Bioremediation ..........................................................2-1

2.1.1 State the Problem .............................................................................................2-1 2.1.2 Identify the Decision ........................................................................................2-1 2.1.3 Identify Inputs to the Decisions .......................................................................2-1 2.1.4 Define Study Boundaries .................................................................................2-2 2.1.5 Develop a Decision Rule..................................................................................2-2 2.1.6 Specify Limits on Decision Errors ...................................................................2-2 2.1.7 Design Data Collection Program......................................................................2-2

2.2 Data Quality Objectives for In Situ Bioremediation Rebound Test ...................................2-2 2.2.1 State the Problem .............................................................................................2-2 2.2.2 Identify the Decision ........................................................................................2-2 2.2.3 Identify Inputs to the Decisions .......................................................................2-3 2.2.4 Define Study Boundaries .................................................................................2-3 2.2.5 Develop a Decision Rule..................................................................................2-3 2.2.6 Specify Limits on Decision Errors ...................................................................2-4 2.2.7 Design Data Collection Program......................................................................2-4

2.3 Data Quality Objectives for Pump and Treat .....................................................................2-4 2.3.1 State the Problem .............................................................................................2-4 2.3.2 Identify the Decision ........................................................................................2-4 2.3.3 Identify Inputs to the Decisions .......................................................................2-4 2.3.4 Define Study Boundaries .................................................................................2-5 2.3.5 Develop a Decision Rule..................................................................................2-5 2.3.6 Specify Limits on Decision Errors ...................................................................2-6 2.3.7 Design Data Collection Program......................................................................2-6

2.4 Data Quality Objectives for Monitored Natural Attenuation .............................................2-6 2.4.1 State the Problem .............................................................................................2-7

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2.4.2 Identify the Decisions ......................................................................................2-7 2.4.3 Identify Inputs to the Decisions .......................................................................2-7 2.4.4 Define Study Boundaries .................................................................................2-7 2.4.5 Develop a Decision Rule..................................................................................2-8 2.4.6 Specify Limits on Decision Errors ...................................................................2-8 2.4.7 Design Data Collection Program......................................................................2-8

2.5 Data Quality Objectives for Radionuclide Monitoring ....................................................2-10 2.5.1 State the Problem ...........................................................................................2-10 2.5.2 Identify the Decision ......................................................................................2-10 2.5.3 Identify Inputs to the Decisions .....................................................................2-10 2.5.4 Define Study Boundaries ...............................................................................2-11 2.5.5 Develop a Decision Rule................................................................................2-11 2.5.6 Specify Limits on Decision Errors .................................................................2-11 2.5.7 Design Data Collection Program....................................................................2-11

3. IN SITU BIOREMEDIATION MONITORING.............................................................................3-1 3.1 In Situ Bioremediation Sampling Strategy and Objectives ................................................3-1 3.2 Sampling Locations and Frequencies .................................................................................3-1 3.3 Analytes and Methods ........................................................................................................3-1 3.4 Data Validation...................................................................................................................3-6 3.5 Water-Level Measurements................................................................................................3-6

4. IN SITU BIOREMEDIATION REBOUND TEST MONITORING..............................................4-1 4.1 In Situ Bioremediation Rebound Test Sampling Objectives and Strategy.........................4-1 4.2 In Situ Bioremediation Monitoring During Rebound Test.................................................4-4

4.2.1 Groundwater Sampling Locations, Frequencies, and Analytes........................4-4 4.2.2 Vapor Sampling Location, Frequency, and Analytes.......................................4-4 4.2.3 Analytical Methods ..........................................................................................4-4 4.2.4 Data Validation During Rebound Test.............................................................4-6

4.3 Pump and Treat Monitoring During In Situ Bioremediation Rebound Test ......................4-6 4.4 Monitored Natural Attenuation Sampling During In Situ Bioremediation

Rebound Test......................................................................................................................4-6 4.5 Radionuclide Monitoring During In Situ Bioremediation Rebound Test ..........................4-6

4.5.1 Sampling Locations, Frequency, and Analytes ................................................4-6 4.5.2 Analytical Methods ..........................................................................................4-7 4.5.3 Data Validation ................................................................................................4-7

4.6 Water-Level Measurements During Rebound Test ............................................................4-8

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5. PUMP AND TREAT MONITORING ............................................................................................5-1 5.1 New Pump and Treat Facility.............................................................................................5-1

5.1.1 New Pump and Treat Facility Monitoring Objectives and Strategy ................5-1 5.1.2 New Pump and Treat Facility Sampling Locations, Frequency,

and Analytes............................................................