ATCP 93.520(3)(a)2.
2. All new and existing impressed current systems shall maintain either of the following standard protection levels:
ATCP 93.520(3)(a)2.b.
b. A 100 millivolt or greater negative shift in polarization between the instant-off reading and the native soil reading or a 100 millivolt or greater positive shift in the depolarized structure potential from the instant-off reading.
ATCP 93.520(3)(a)3.
3. When a new impressed current system is installed or an existing system is replaced in whole or in part, an ammeter shall be installed, along with an hour meter that totals the number of hours during which electric current flows through the system.
ATCP 93.520(3)(b)
(b)
Failing impressed current systems. If impressed current corrosion protection readings taken in accordance with sub.
(1) (d) 2. indicate the system is not maintaining adequate continuous protection, the system shall be analyzed by a certified corrosion expert for site corrosion potential and qualification of system functionality.
ATCP 93.520(3)(c)1.1. Impressed current systems that have been inoperative for 120 days or less shall comply with all of the following requirements:
ATCP 93.520(3)(c)1.a.
a. Power shall be restored and the system shall be tested by a certified cathodic protection tester for system functionality.
ATCP 93.520(3)(c)1.b.
b. If the impressed current system is damaged or inoperable, a certified corrosion expert shall repair, survey, and recommission the system.
ATCP 93.520(3)(c)2.
2. Impressed current systems that have been inoperative for 121 to 180 days shall comply with all of the following requirements:
ATCP 93.520(3)(c)2.b.
b. Power shall be restored and the system shall be tested for system functionality by a certified cathodic protection tester.
ATCP 93.520(3)(c)2.c.
c. If the impressed current system is damaged or inoperable, a certified corrosion expert shall repair, survey, and recommission the system.
ATCP 93.520(3)(c)3.
3. Impressed current systems that have been inoperative for 181 to 365 days shall comply with all of the following requirements:
ATCP 93.520(3)(c)3.b.
b. A certified corrosion expert shall assess, survey, and recommission the impressed current system and perform any necessary repairs.
ATCP 93.520(3)(c)4.
4. Impressed current systems that have been either inoperative or not tested for more than 365 days shall comply with all of the following requirements:
ATCP 93.520(3)(c)4.b.
b. If the tank fails the internal inspection, the tank owner shall either have the tank repaired and lined, or have the lining repaired in accordance with s.
ATCP 93.530, or have the tank permanently closed and removed in accordance with s.
ATCP 93.560.
ATCP 93.520(3)(c)4.c.
c. If the tank is not closed under subd.
4. b., a certified corrosion expert shall assess, survey, and re-commission the impressed current system and perform any necessary repairs.
ATCP 93.520(3)(c)4.d.
d. If the tank is not closed under subd.
4. b., a precision tightness test shall be performed on the tank system in accordance with s.
ATCP 93.515 (4). In addition, a tightness test shall be performed on the ullage portion of the tank in accordance with s.
ATCP 93.515 (10).
ATCP 93.520 History
History: CR 17-092: cr.
Register October 2019 No. 766, eff. 11-1-19; correction in (1) (d) 3. (intro.), (e) 3., (2) (b) 2., (3) (c) 4. c., d. made under s.
35.17, Stats.,
Register October 2019 No. 766.
ATCP 93.530
ATCP 93.530 Tank lining of underground storage tanks. ATCP 93.530(1)(a)(a) The installation of interior tank lining for underground storage tanks shall comply with API 1631 and this section.
ATCP 93.530(1)(b)
(b) An underground storage tank that does not meet the structural requirements specified in API 1631 may not be upgraded or repaired by lining and shall be permanently closed in accordance with this chapter.
ATCP 93.530(1)(c)
(c) When lining a tank, an access way for an inspector to enter the tank shall be installed from the tank interior to finished grade, if not already provided.
ATCP 93.530(2)
(2)
Inspection and reporting requirements for tank lining. ATCP 93.530(2)(a)1.1. It is the responsibility of the lining contractor to communicate with the authorized agent or the department to establish the time for inspections.
ATCP 93.530(2)(a)2.
2. The lining contractor shall give the authorized agent or the department at least 5 days of written notice before beginning the tank lining or any excavation preliminary to tank lining.
ATCP 93.530(2)(b)
(b)
Plan approval. The tank owner is responsible for obtaining plan approval from the authorized agent or the department in accordance with s.
ATCP 93.100 before beginning the tank lining or any excavation preliminary to tank lining.
ATCP 93.530(2)(c)1.1. 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.
ATCP 93.530(2)(c)2.a.
a. A description of the internal wall condition including any deflection and any defects, rust plugs, holes or leaks, regardless of size or number.
ATCP 93.530(2)(c)2.b.
b. A description of any repair or other conditioning necessary to prepare the tank for interior lining.
ATCP 93.530(2)(c)2.c.
c. 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
Note: Section
292.11, Stats., requires immediate notification of the department of natural resources in the event of a hazardous substance discharge.
ATCP 93.530(2)(c)3.
3. 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 to
93.585.
ATCP 93.530(2)(d)1.1. The authorized agent or the department shall be at the site before the actual application of the lining.
ATCP 93.530(2)(d)2.
2. The application of the interior lining may proceed only when authorized by the authorized agent or the department after verifying all of the following:
ATCP 93.530(2)(d)2.a.
a. The tank integrity assessment and any required tank-system site assessment have been completed.
ATCP 93.530(2)(dm)
(dm)
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.
ATCP 93.530(2)(e)1.a.a. 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.
ATCP 93.530(2)(e)1.b.
b. 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.
ATCP 93.530(2)(e)2.
2. 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
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.
ATCP 93.530(2)(f)
(f)
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
ATCP 93.535 Periodic inspection and repair of lined tanks. ATCP 93.535(1)(a)
(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.
ATCP 93.535(1)(b)
(b) This section applies whether or not cathodic protection has been added to the tank system.
ATCP 93.535(2)
(2) Any complete or partial tank lining conducted any time after the original tank lining was installed is considered a repair of the lining.
ATCP 93.535(3)
(3) The owner shall notify the authorized agent and the department in writing at least 5 business days before having the inspection performed.
ATCP 93.535(3m)
(3m) Before commencing any inspection, the underground tank system liner shall ensure that the tank is prepared for inspection in accordance with API 1631.
ATCP 93.535(4)
(4) Tank lining inspections shall use one of the following methods:
ATCP 93.535(4)(a)
(a) 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.
ATCP 93.535(5)(a)
(a) For tanks with lining and cathodic protection added at the same time, if cathodic protection has been maintained at a protective level:
ATCP 93.535(5)(b)
(b) For tanks with cathodic protection added after the tank was lined:
ATCP 93.535(5)(b)1.
1. 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).
ATCP 93.535(5)(b)2.
2. 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).
ATCP 93.535(5)(c)
(c) For lined tanks without cathodic protection installed, physical inspection is required under sub.
(4) (b).
ATCP 93.535(5)(d)
(d) The use of the equipment to perform the inspections under par.
(a) shall be in accordance with national consensus standards.
ATCP 93.535(5)(e)
(e) 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).
ATCP 93.535(5)(f)
(f) The person performing the inspection shall be certified by the manufacturer of the inspection equipment.
ATCP 93.535(7)
(7) Repair of tank linings shall comply with the requirements of API 1631 and the lining manufacturer's specifications.
ATCP 93.535(7g)
(7g) 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.
ATCP 93.535(7r)
(7r) 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.
ATCP 93.535(8)
(8) 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:
ATCP 93.535(8)(b)
(b) The tank has impressed current corrosion protection installed in accordance with s.
ATCP 93.520 before being placed back into service.
