A Massachusetts regulation adopted in 2008 (527 CMR 9.05(G)(10) pdf format of 527009.pdf
, succeeded by 310 CMR 80.15 pdf format of 310 CMR 80.00: UST Systems
) has required all single-walled steel tanks (SWSTs) to be removed or permanently closed in-place by August 7, 2017. MassDEP is exercising enforcement discretion to grant extensions of that deadline until July 1, 2018, to SWST owner/operators who: 

  • Take SWSTs “out of service” on or before August 7, 2017; 
  • Submit a Single-Walled Steel Tank “Out of Service” Notification  doc format of Single-Walled Steel Tank “Out of Service” Notification
pdf format of                             Single-Walled Steel Tank “Out of Service” Notification                to MassDEP within 30 days of their “out of service” dates; and 
  • Submit to MassDEP no later than August 7, 2017, fully executed (signed) contracts for removing “out of service” SWSTs or closing them in-place on or before July 1, 2018.

For additional information, see pages 9 and 10 of the Frequently Asked Questions: 310 CMR 80.00  pdf format of Frequently Asked Questions: 310 CMR 80.00
doc format of                             ust-regfaq.doc                and review the following correspondence from MassDEP to SWST owner/operators: