SGM-SF-2017

Introduction 3
SGM-SF Consensus Body 2
Table of Contents 4
1. Scope 5
2. Significance of Use 5
3. Qualified Contractors 6
4. General Practices 7
4.1 Existing tests 7
4.2 Building specifications 7
4.3 Proposals 7
4.4 Hazards-prior notification 7
4.5 Jurisdictions/Codes 8
5. System Design 8
6. Building Investigations 8
7. ASD Systems 10
7.1 Suction Points 10
7.2 ASD Piping 12
7.3 ASD Pipe Sizing 15
7.4 ASD Exhaust—Discharge and Location 16
7.5 ASD Fans 18
8. Sealing 19
8.1 Background-Accessibility 19
8.2 Sealant Materials 19
8.3 Accessible Cracks 19
8.4 Other Openings 19
8.5 Sumps 19
8.6 Membranes over Soil 20
8.7 Sub-membrane Depressurization 20
8.8 Drains 21
8.9 Sealed Isolation Assemblies 21
9. Required for All Systems 21
10. Radon Post-mitigation 24
11. Chemical Vapor Intrusion 26
11.1 Exposure concerns 26
11.2 Qualified Teams & Professionals 27
11.3 General Practices 27
11.4 Investigations and System Design 29
11.5 Additional System Specifications 30
11.6 Rapid Response 31
11.7 Post-mitigation Functional Inspection 32
11.8 Post-mitigation Testing 32
12. Documentation - Chemical Vapor Intrusion 33
12.1 Occupant 33
12.2 Client Operations Manual 33
Table 12.2 OM&M Manual Requirements 35
Table 12.3 Informational - Monitoring Events and Stewardship 36
12.3 Initial Post-mitigation Testing 37
12.4 Stewardship 38
12.5 Decommissioning Systems 38
Annex A: Non-ASD Methods 39
A-1 All Non-ASD methods 39
A-2 Indoor Pressurization 41
A-3 Indoor Air Dilution 41
A-4 Soil Pressurization 42
A-5 Soil Gas Dilution 42
A-6 Sources of Air 42
A-7 System Controls 43
A-8 HVAC Repair/Modification 43
A-9 If Building Materials are the Primary Source 43
A-10 Radon from Water 44
A-11 Chemical Vapors from Water 44
A-12 Air Cleaning 44
A-13 Source Removal 44
A-14 Passive Technologies 44
Annex B: Health and Safety 46
B-1 Mitigation Installer 46
B-2 General Precautions 46
B-5 Flue Gas Spillage 48
B-6 Asbestos 49
B-7 Lead-Based Paint 49
Annex C: Descriptions of Terms 50
Exhibits 53
A. Access Notice-To Client 53
B. Access Notice-To Occupant 54
C. Posted Notice-For Occupants 55
E. Referenced Publications 56
SGM-SF Companion Guidance 57
CG 1-3 • Discussion of Quality Management 58
CG 1-6 • Discussion of PFE evaluations 60
CG 7.1-7.2 Suction Points and Piping 62
CG 7.2.11 Pipe Routing Code Examples 63
CG 8-9 Sealing and Electrical Code Examples 67
CG 11 Vapor Intrusion advisories 70
CG 11.2 Commissioning 71
CG 11.5.5 Explosion Proof Fan Details 73
CG 12 Stewardship and Surrogate Test Methods Discussion 76
CG 12 Test Notices 77
CG Annex A Non-ASD Fundamentals 78

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