Section 93.545. Seldom-used and temporarily-out-of-service tanks.

 

(1)   Operational requirements. When a storage tank system is placed temporarily out of service, the owner or operator shall comply with all of the following:

(a)

1. Operation and maintenance of corrosion protection and leak detection systems shall be continued, except as provided in subd. 2.

2.

a. Leak detection shall be maintained in accordance with this chapter unless the tank system is empty.

b. The tank system is empty when all liquid has been removed from the tank and the associated piping so that no more than 1 inch of residue, or 0.3 percent by weight of the total capacity of the tank system, remains in the system.

(b) The tank shall be protected against floatation caused by flooding or soil saturation.

(c)

1. The tank, piping, dispensing equipment, lines, pumps, manways, and other ancillary equipment shall be secured to prevent tampering, except as exempted in subd. 2.

2. Facilities that are in operation and secured against general public access are not required to have the additional security required in subd. 1.

(d) All vent lines shall be left open and functioning.

(e) All periodic inspections and maintenance shall be performed as if the tank were still in service.

(f) Financial responsibility requirements of subch. VII shall be maintained.

(2)   Placing a tank back into service.

(a) A precision tightness test shall be performed on the tank and piping in accordance with s. ATCP 93.515 (4) before placing the tank system back into service.

(b) Tank systems out of service for more than 365 days shall have a pressure test of the ullage portion to assure that tank connections are tight and shall fully comply with this chapter before being placed back into service, except double-wall construction is not newly required for tank systems installed before February 1, 2009.

(c) Tank systems covered in par. (a) shall immediately have the leak detection system verified in accordance with s. ATCP 93.510 (2) .

(d) Tanks covered in par. (b) shall have all the respective components documented as functional on form ERS-10778.

(3)   Non-complying tank systems. Tank systems that are placed out of service which do not comply with this section shall be permanently closed in accordance with s. ATCP 93.560 within 60 calendar days.

CR 07-029 : cr. Register November 2008 No. 635 , eff. 2-1-09; CR 09-017 : am. (1) (a) 2. b., (2) (b), (c), and (3), cr. (2) (d) Register July 2009 No. 643 , eff. 8-1-09; correction in (2) (a), (c), (3) made under s. 13.92 (4) (b) 7. , Stats., Register December 2011 No. 672 ; corrections in (2) (a), (c), (3) made under s. 13.92 (4) (b) 7. , Stats., Register October 2013 No. 694 .

Note

Form ERS-10778, Underground Tank System Release and Leak Monitoring Functionality Verification, is available from the Bureau of Weights and Measures, PO Box 8911, Madison, WI 53708-8911, or at telephone [phone], or from the Bureau's Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanks.aspx . Microsoft Windows NT 6.1.7601 Service Pack 1