Assumes a vapor barrier has been properly installed (ie. No leaks and operating as designed) 1)Operation and Maintenance Plan (aka. Long-Term Stewardship (LTS) Plan ) for Vapor Barrier i.Photos, diagrams, manufacturers description of the production include life expectancy and certificates ii.Photos and Diagrams of the System iii.If Active System, engineering diagram of any mechanical system, including life expectancy iv.Description of any system alarm v.Vapor Barrier repair procedures vi.Description of who is responsible for which parts of system and who to call in an emergency (ie. system alarm, etc.) vii.Description of any institutional controls 1.Call appropriate regulatory agency prior to cutting floor or cutting vent piping. viii.Monitoring requirements ix.Define exceedance 1.Retest twice 2)Discussion of Passive System a.When to turn ON system (ie. Passive to Active) 3)Discussion of Active System 4)Long Term Monitoring a.Equipment- per manufacturer requirements b.Vapor Barrier i.Indoor Air (plus ambient) 1.COCs only plus outdoor ambient air a.Discussion of indoor air influences ( i.Could add ways to differentiate indoor air sources but seems beyond the scope of the document. 2.Full list ii.Sub-Slab 1.Indoor plus sub-slab 2.Tracer Gas ie. Helium 3.Smoke iii.Stack 1.Plus ambient iv.Pressure Differential 1.Instantaneous 2.Continuously 5)Monitoring Frequency a.Monitor up to four times (quarterly) during 1st year after installation. Can reduce after 1st year. b. 6)Leaks a.How to find the leak i.Smoke test ii.Tracer test iii.Quantitative b.Repair c.Retesting to confirm repair 7)When to discontinue system operation a.Review testing results b.Testing i.Turn off system and test 1.Indoor plus ambient 2.Sub-slab References USEPA Engineering Issue- Indoor Air Vapor Intrusion Mitigation Approaches USEPA VI Draft Guidance April 2013
Currently users of vapor barriers assume that they have been properly installed and are functioning effectively. This standard will provide guidance on Operation and Maintenance for Vapor Barriers. Included are monitoring, testing in different applications, frequency of monitoring, locating and repair of leaks.
KeywordsVapor Barriers, Monitoring, life expectancy, repairs, Passive systems,
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development