The United States Postal Service (“USPS”) has placed its Vapor Intrusion policy and guidance on this link for informational purposes only. The purpose of this information is to provide internal guidance  for use by USPS employees only that may be involved in projects involving VI related issues and should not be relied on by persons or parties outside of the employment of the USPS.   No guarantee is either expressed or implied that the information contained in these documents is accurate, complete, full or appropriate for construction and/or remediation purposes. Any person or entity that uses these documents does so at his/her own risk and/or expense.  If you have any questions concerning Vapor Intrusion projects or this guidance document please contact Charlotte Parrish at the following email address:

charlotte.parrish@usps.gov