SGM-SF_2017with 12/20 Revisions

ANSI/AARST SGM-SF 2017 (with 12/20 revisions) Introduction iii SGM-SF 2017 with 12/20 Revisions Table of Contents Page 1.0 Scope 1 2 .0 Applicability 2 3.0 Qualified Contractors 2 4.0 General Practices 3 5.0 System Design 5.1 Health and Safety 5 5.2 Long-Term Considerations 5 5.3 Appropriate Systems 5 5.4 Nondestructive Investigation 6 5.5 Diagnostic Investigation 6 5.6 Design Decisions 7 Design Decision Flowcharts 8-9 6.0 ASD System Installations 6.1 ASD Suction Points 10 6.2 ASD Piping 13 6.3 ASD Pipe Sizing 17 6.4 ASD Exhaust Discharge 19 6.5 ASD Fan Installation 23 7.0 Sealing 7.1 Background and Accessibility 25 7.2 Sealant Materials 25 7.3 Accessible Cracks 25 7.4 Other Openings to Soil 26 7.5 Sumps and Pits 26 7.6 Membranes Over Exposed Soil 27 7.7 Sub-membrane Depressurization 28 7.8 Drains 28 7.8 Sealed Isolation Assemblies 29 8.0 For All Systems and Methods 8.1 Long-Term OM&M Plan 30 8.2 System Monitors 30 8.3 Electrical 31 8.4 Labeling 31 8.5 Inspection for Compliance 34 8.6 Retention of Records 34 9.0 Radon Post-mitigation 9.1 Functional Evaluation 35 9.2 Initial Radon Retests After Mitigation 35 10.0 Radon Documentation 10.1 Essential Information 36 10.2 When Not Owner - Occupied 37 10.3 If Non-ASD Systems are Installed 37 11.0 Health and Safety 11.1 Mitigation Installers 38 11.2 Both Workers and Occupants 39 11.3 Radon Mitigation 40 11.4 Chemical Vapor Mitigation 40 12.0 Non-ASD Systems and Methods 12.1 For All Non-ASD Methods 43 12.2 Sources of Air 44 12.3 Indoor Air Pressurization 45 12.4 Soil Air Pressurization 46 12.5 Indoor Air Dilution 47 12.6 Soil Air Dilution 47 12.7 Controls for Variable Activation 48 12.8 HVAC Repairs and Modifications 48 12.9 Building Materials 48 12.10 Water 48 12.11 Source Removal 48 12.12 Air Cleaning 49 12.13 Passive Methods and Systems 49 13.0 Vapor Intrusion Requirements 13.1 Qualified Professionals and Teams 51 13.2 Assemble Site information 51 13.3 Building Investigations 52 13.4 Additional System Specifications 54 13.5 Post-mitigation Inspection 55 13.6 Rapid Response Situations 55 13.7 Documentation 57 Table 13.7 OM&M Manual Requirements 59 Appendix A Informative Chemical Vapor Intrusion A-1 Understanding Exposure Concerns 60 A-2 Guidance for Teams 61 A-3 Monitoring Events—Stewardship 63 14.0 Description of Terms 67 Exhibit A Sample Notices 70-72 Exhibit B Sample Posted Notice (Caulk) 73 Exhibit C Temporary Label / Risk Chart 74 Appendix B Referenced Publications 75 Appendix C Consensus Body Members 76-77 Informative SGM-SF Companion Guidance Quality management Diagnostics ASD Code excerpts (pipe routing) Code excerpts (electrical) Explosion proof fans Commissioning and duties Surrogate measurements