Table of Contents 1 88

RMS-LB 2018 with 12/20 Revisions

Introduction 2
Table of Contents 4
1.0 Scope 5
2.0 Applicability 6
2.1 Mandatory Conventions 6
2.2 Prior Systems 6
2.3 Adoption and Use 6
3.0 Qualified Contractors 6
3.1 Trained Professional 6
3.2 Contractors, Teams and Qualifications 6
3.3 Quality Management 7
4.0 General Practices 7
4.1 Assemble Building Information 7
4.2 Proposals 8
4.3 Notifications and Hazards 8
4.4 Jurisdictional Authorities 9
5.0 System Design 9
5.1 Health and Safety 9
5.2 Long-term Consideration 9
5.3 Appropriate Systems 9
5.4 Nondestructive Investigation 11
5.5 Diagnostic Investigation 15
5.6 Design Decision Flowcharts 17
6.0 ASD Systems 19
6.1 ASD Suction Points 19
6.2 ASD Piping 22
6.3 Pipe Sizing 26
6.4 ASD Exhaust Discharge 28
6.5 ASD Fan Installation 32
7.0 Sealing 34
7.1 Background and Accessibility 34
7.2 Sealant Materials 34
7.3 Accessible Slab Cracks 34
7.4 Other Openings to Soil 35
7.5 Sump and Pits 35
7.6 Membranes Over Exposed Soil 36
7.7 Sub-membrane Depressuriztion 37
7.8 Drains 37
7.9 Sealed Isolation Assemblies 38
8.0 All Systems/Methods 39
8.1 Long-term OM&M Plan 39
8.2 System Monitors 39
8.3 Electrical 40
8.4 Labeling 41
8.5 Inspection for Compliance 44
8.6 Retention With Clients 44
9.0 Post-mitigation 45
9.1 Functional Evaluation 45
9.2 Initial Radon Test After Mitigation 45
10.0 Documentation 47
10.1 Essential Information 47
10.2 When Owner-Occupied 48
10.3 Non-ASD Systems 48
10.4 Inadvertent Collateral Mitigation 48
10.5 When Not Owner-Occupied 49
Table 10.5 OM&M Plan Requirements 50
11.0 Health and Safety 51
11.1 Mitigation Installers 51
11.2 Worker and Occupants 52
12.0 Non-ASD Systems/Methods 54
12.1 All Non-ASD Methods 54
12.2 Sources of Air 55
12.3 Indoor Air Pressurization 56
12.4 Soil Air Pressurization 57
12.5 Indoor Air Dilution 58
12.6 Soil Air Dilution 58
12.7 Controls for Variable Activation 59
12.8 HVAC Repairs or Modifications 59
12.9 Buiding Materials 59
12.10 Water 59
12.11 Source Removal 59
12.12 Air Cleaning 60
12.13 Passive Methods and Systems 60
13.0 Description of Terms 62
Exhibits 65
A-1: Contractor to Client 65
A-2: Management to Staff 66
A-3: Management to Occupants 67
B: Contractor to Occupants 68
C: Temporary Systems 69
Appendic A: References 70
Appendix B: Consensus Body Members 71
RMS-LB Companion Guidance 72
CG A: Guidance to Property Owners 73
CG B: Guidance when considering Non-ASD Methods 74
CG C: Heating, Cooling and Ventilation 75
CG D: Quality Management 77
CG E: Average Operating Conditions 79
CG E: Maintenance Inspectios and Logs 83

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