ASTM E2600-15: Overview of Recent Revisions to the Vapor Encroachment Screening Guide In December 2015, ASTM Subcommittee E50.02 (Real Estate Assessment and Management) approved revisions to the Standard Guide E2600 for Vapor Encroachment on the property involved in real estate transactions. This was the first update in 5 years. Read more Sep. 17 2019 - Jim Bartlett Vapor EncroachmentASTM E2600-15