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Mercury
Work Group
Phase I Reports >> Infrastructure Report
Executive Summary | End-of-Pipe Report |
Operations Report | Infrastructure Report
For more information,
contact David Eppstein by email at
deppstein@masco.harvard.edu,
or by calling 617-632-2860.
MWRA/MASCO
Hospital Mercury Work Group
Infrastructure Subcommittee
Maintenance Guidebook
This Manual is Intended As a Guideline for the Cleaning
of "Special Waste" Piping and Pretreatment Systems for
Control of Mercury and is Presented to the MWRA/MASCO Work Groups
by Beth Israel Hospital, 330 Brookline Avenue, Boston, Massachusetts,
02115.
TABLE OF
CONTENTS
Acknowledgements
- 1.0 PROBLEM OVERVIEW
- 1.1 Purpose
1.2 General Findings
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- 2.0 SPECIAL WASTES PIPING AND PRETREATMENT SYSTEMS
- 2.1 Definition of Special Waste
2.2 Special Waste Piping Design
2.3 Special Waste Regulatory Guidelines
- 2.3.1 General
- 2.3.2 Design and Installation of Special Waste Systems
- 2.3.3 Neutralizing Sumps (Chip Tanks)
- 2.3.4 pH Adjustment Tanks
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- 3.0 FORMS OF MERCURY
- 3.1 Purpose
3.2 Types of Mercury
- 3.2.1 Mercury the Element
3.2.2 Elemental Mercury (Hg 0)
3.2.3 Methyl Mercury (CH3Hg+)
3.2.4 Dimethyl Mercury (CH3)2Hg
3.2.5 Divalent Mercury (Hg 2+)
- 3.3 Use of Mercury
- 3.3.1 Mercury Products
- 4.0 MERCURY ACCUMULATION IN BIOMASS
- 4.1 General
4.2 Biomass Formation
4.3 Biomass Absorption of Mercury
4.4 Mercury Accumulation Process
4.5 Dimethyl Mercury Precautions
- 5.0 SPECIAL WASTE RISER
- 5.1 Purpose
- 5.2 Riser Diagram
- 5.2.1 Facility Audit
5.2.2 System Designs and Modifications
5.2.3 Isolation Valves
5.2.4 Sampling Port / Drain Leg
5.2.5 Riser Venting
5.2.6 Glass Inspection Segment
5.2.7 Chemical Reactions of Incompatible Materials
5.2.8 Support Engineering Drawings
- 6.0 TRAP CLEANING PROTOCOL
- 6.1 Purpose
6.2 Trap Location / Identification
6.3 Removal of Elemental Mercury
6.4 Removal of Biomass
6.5 Cleaning Procedures
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- 7.0 INFRASTRUCTURE POWERWASHING
- 7.1 Purpose
7.2 Powerwashing Operations
- 7.2.1 Cleaning Operations
7.2.2 Powerwashing Precautions
7.2.3 Wastewater Disposal
7.3 Equipment
- 7.3.1 KJ-1250 Water Jetter
- 7.4 Chemicals used
- 7.4.1 Chemical Addition
- 7.4.2 Bleach Solution
7.4.3 Other Cleaning Chemicals
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- 8.0 CHEMICAL CLEANING
- 8.1 Purpose
8.2 Plumbing Sample Procurement From Host Institutions
8.3 Bench Testing and Chemical Cleaning
- 8.3.1 Protocol Cleaning Chemicals
8.3.2 Protocol Samples
8.3.3 Summary of Protocol Analytical Data
8.3.4 Sulfuric Acid
8.3.5 Hydrogen Peroxide and Hydrogen Peroxide/Sulfuric
Acid Etch
8.3.6 Potassium Hydroxide and Sodium Hydroxide
8.3.7 Nitric Acid and Triton X-100
- 8.4 Conclusion
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- 9.0 SAMPLING
- 9.1 Sampling Techniques
- 9.1.1 Grab Sample
9.1.2 Composite Sample
9.1.3 Permit Sampling
- 9.2 Standard Operating Procedures for Sampling
9.3 SMART Data
9.4 Sampling Port
- 10.0 WASTE DISPOSAL PROTOCOL
- 10.1 Purpose
10.2 Waste Disposal Procedures
- 10.2.1 Mercury Limits
10.2.2 Waste Determination
10.2.3 Waste Disposal
APPENDICES
For further information on appendices that are not currently linked here, please contact David Eppstein by email at
deppstein@masco.harvard.edu or by phone at 617-632-2860. Thank you.
- Appendix A MWRA Standard Operating Procedures for Sampling
- Appendix B DEP Certified Independent Laboratories, February,
1995
(Contact the DEP, Lawrence Experiment Station, for current listing, updated biannually)
- Appendix C KJ-1250 Water Jetter
- Appendix D MASCO Pipe Cleaning Protocol
- Appendix E Flowmeter Signal Connection Information
- Appendix F SMART Data Clarification Letter From Mr. Eugene
B. Benson
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