The tank-lining contractor shall provide the tank owner and the authorized agent or the department with a written report of the assessment of the interior surface and structural condition of the tank before leaving the site and before installing the lining.
A description of the internal wall condition including any deflection and any defects, rust plugs, holes or leaks, regardless of size or number.
A description of any repair or other conditioning necessary to prepare the tank for interior lining.
A description of the degree of compliance with all requirements under API 1631 regarding structural qualification, tank cleaning and other pre-lining activities.
ATCP 93.530 Note
, Stats., requires immediate notification of the department of natural resources in the event of a hazardous substance discharge.
If holes or rust plugs are observed during the visual internal inspection, the tank-lining contractor shall notify the owner before lining the tank that a tank-system site assessment must be performed, and that assessment shall be performed in accordance with ss. ATCP 93.575
The authorized agent or the department shall be at the site before the actual application of the lining.
The application of the interior lining may proceed only when authorized by the authorized agent or the department after verifying all of the following:
The tank integrity assessment and any required tank-system site assessment have been completed.
Tank integrity assessment after lining.
After installing the lining, the tank-lining contractor shall have a tightness test performed on the tank ullage in accordance with s. ATCP 93.515 (10)
to assure that all tank-top connections and openings are liquid- and vapor-tight.
The certified tank system liner shall provide a completed, signed, and notarized API 1631 Form B inspection affidavit to the tank owner within 10 business days of completing the lining procedure.
The signature on API 1631 Form B shall be that of the certified tank system liner who conducted the pre-lining tank integrity assessment and the lining procedure.
An underground tank installation checklist, form TR-WM-138, shall be completed and signed by the certified tank system liner and the certified tank system inspector.
ATCP 93.530 Note
See s. ATCP 93.240
, Certifications and Enforcement, for requirements that certified tank system liners perform or supervise specific lining-related activities involving underground storage tanks.
Submittal of forms.
The tank owner shall have all of the following documents submitted to the department within 15 business days of completing the lining procedure:
ATCP 93.530 History
History: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19. ATCP 93.535
Periodic inspection and repair of lined tanks. ATCP 93.535(1)(a)
The owner of a lined tank shall obtain an internal inspection of the tank lining within 5 years after the date of initial tank lining, or repair to a previously installed tank lining, and at least every 5 years thereafter.
This section applies whether or not cathodic protection has been added to the tank system.
Any complete or partial tank lining conducted any time after the original tank lining was installed is considered a repair of the lining.
The owner shall notify the authorized agent and the department in writing at least 5 business days before having the inspection performed.
Before commencing any inspection, the underground tank system liner shall ensure that the tank is prepared for inspection in accordance with API 1631.
Tank lining inspections shall use one of the following methods:
Video camera inspection in accordance with KWA Method A only. A pre-inspection tightness test shall be performed in accordance with s. ATCP 93.510 (4)
; if the tank fails the tightness test, video inspection is not permitted.
For tanks with lining and cathodic protection added at the same time, if cathodic protection has been maintained at a protective level:
For tanks with cathodic protection added after the tank was lined:
For first 5-year inspection following cathodic protection addition with cathodic protection maintained at a protective level, physical inspection is required under sub. (4) (b)
If first 5-year inspection indicates no change of external wall thickness, then subsequent 5-year inspections can be performed as allowed in sub. (4)
For lined tanks without cathodic protection installed, physical inspection is required under sub. (4) (b)
The use of the equipment to perform the inspections under par. (a)
shall be in accordance with national consensus standards.
Inspection and repairs of lined tanks shall be conducted by or under the direct supervision of an underground tank system liner in accordance with s. ATCP 93.240 (1) (b)
The person performing the inspection shall be certified by the manufacturer of the inspection equipment.
Repair of tank linings shall comply with the requirements of API 1631 and the lining manufacturer's specifications.
Tanks that have an overall average tank metal thickness or an average tank thickness of a designated thin wall area of less than 75 percent or any through-wall perforations shall be immediately closed per s. ATCP 93.560
Tanks that have an overall average tank metal thickness or an average tank thickness of a designated thin wall area of 75 percent to 85 percent shall have an impressed current system installed per s. ATCP 93.520
or be immediately closed per s. ATCP 93.560
A lined tank that requires repairs to more than 10 percent of the lined surface shall be returned to service only if all of the following conditions are met:
The tank has impressed current corrosion protection installed in accordance with s. ATCP 93.520
before being placed back into service.
The person performing the inspection shall provide a report to the owner, authorized agent, and the department within 15 days of completing the inspection that describes all of the following items in addition to those required in API 1631:
The total dimension of the area in square inches that has been repaired by lining.
Before placing any tank back into service under this section, both of the following shall occur in the following order:
An access way for an inspector to enter the tank shall be installed from the tank interior to finished grade, if not already provided.
A precision tightness test shall be performed on the tank system in accordance with s. ATCP 93.515 (4)
. In addition, tightness test shall be performed on the ullage portion of the tank in accordance with s. ATCP 93.515 (10)
ATCP 93.535 History
History: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19; correction in (4) (intro.) made under s. 35.17, Stats., and correction in (5) (b) 2. made under s. 13.92 (4) (b) 7., Stats., Register October 2019 No. 766. ATCP 93.545
Seldom-used and temporarily out of service tank systems. ATCP 93.545(1)(1)
When a storage tank system is placed temporarily out of service, the owner or operator shall comply with all of the following:
Operation and maintenance of corrosion protection shall be continued.
The tank, piping, dispensing equipment, lines, pumps, manways, and other ancillary equipment shall be secured to prevent tampering, except as exempted in subd. 2.
Facilities that are in operation and secured against general public access are not required to have the additional security required in subd. 1.
All vent lines shall be left open and functioning.
All inspections, maintenance, and periodic testing shall be performed as if the tank were still in service.
Product must be removed from tanks if they have been in TOS status for 12 months.
Product must be tested and meet ASTM standards prior to bringing the tank back into service.
The tank system is empty when all liquid has been removed from the tank and the associated piping so that no more than one inch of residue remains in the system.
The tank shall be protected against flotation caused by flooding or soil saturation.
Single-walled tanks or piping installed more than 30 years ago shall be placed back into service within one year or be permanently closed per s. ATCP 93.560
Tank systems out of service for more than 365 days shall pass a tightness test of the ullage portion in accordance with s. ATCP 93.515 (10)
to assure that tank connections are liquid- and vapor-tight.
The tank system shall fully comply with this chapter before being placed back into service, except double-wall construction is not newly required for underground tank systems installed before February 1, 2009.