Chapter ATCP 93

ATCP 93.500(6) (6) Installation.

ATCP 93.500(6)(a) (a) General.

ATCP 93.500(6)(a)1. 1.

ATCP 93.500(6)(a)1.a. a. The installation of underground tanks and associated piping shall be performed or supervised by a certified installer.

ATCP 93.500(6)(a)1.b. b. A certified installer shall verify that the installation of the electrical components for a tank system does not conflict with this chapter, except this verification is not required for the electrical criteria in ch. SPS 316.

ATCP 93.500(6)(a)2. 2. All installation shall be in accordance with the manufacturer’s instructions, the applicable national standards adopted in s. ATCP 93.200, plans and specifications approved under s. ATCP 93.100 and this chapter.

ATCP 93.500(6)(a)3. 3. Tank and pipe interstitial leak detection equipment shall be tested for operability and functionality at installation.

ATCP 93.500(6)(b) (b) Tanks.

ATCP 93.500(6)(b)1. 1. Tanks shall have an air pressure and soap test performed after unloading.

ATCP 93.500(6)(b)2. 2.

ATCP 93.500(6)(b)2.a. a. All new and replacement tanks and pipe systems shall pass a pre-operational pressure or vacuum testing that assure that the tank, pipe, and all connections are tight in accordance with NFPA 30 section 21.5 and PEI RP100 chapters 11 and 14 before the tanks and pipe systems are placed into service.

ATCP 93.500(6)(b)2.am. am. Pre-operational testing shall be recorded on the department’s pre-operational test form, TR-WM-155, and shall be maintained onsite in accordance with sub. (9) (a).

ATCP 93.500(6)(b)2.b. b. If a volumetric tank integrity test is used, it shall be capable of detecting a leak of 0.1 gallon per hour from any portion of the tank when the tank is at least 70 percent full of product, shall be approved in accordance with s. ATCP 93.130, and shall be performed in accordance with the approval. In addition, a tightness test shall be performed on the ullage portion of the tank in accordance with s. ATCP 93.515 (10).

ATCP 93.500 Note Note: Volumetric tests approved under section ATCP 93.130 at 95 percent capacity are acceptable under this section at 70 percent capacity in combination with the ullage test.

ATCP 93.500(6)(b)2.c. c. If a non-volumetric tank integrity test is used, it shall be capable of detecting a leak of 0.1 gallon per hour from any portion of the tank at any product level.

ATCP 93.500(6)(b)2.d. d. The volumetric or non-volumetric tests performed under this section shall be conducted by a certified tank system tightness tester. An automatic tank gauge cannot be used to perform the volumetric or non-volumetric test requirement under this paragraph.

ATCP 93.500(6)(b)3. 3. If the tank has integral secondary containment, both the primary and secondary containment shall be tested in accordance with this paragraph.

ATCP 93.500 Note Note: The department has accepted use of the following standards in testing secondary containment under this paragraph: Steel Tank Institute Recommended Practice R012, Recommended Practice for Interstitial Tightness Testing of Existing Underground Double Wall Steel Tanks. This standard is available from the Steel Tank Institute at 644 Donata Court, Zurich, IL 60047 and Fiberglass Tank and Pipe Institute Protocol, Field Test Protocol for Testing the Annular Space of Installed Underground Fiberglass Double and Triple-Wall Tanks with Dry Annular Space. This standard is available by contacting FTPI at http://www.fiberglasstankandpipe.com.

ATCP 93.500(6)(b)4. 4. Tanks may be ballasted during installation with either clean potable water or the regulated liquid that will be stored in the tank.

ATCP 93.500(6)(b)4.a. a. If ballasted with the regulated liquid, all of the following shall be required: interstitial monitoring either by electronic sensor or weekly visual reading of interstitial vacuum gauge with vacuum gauge readings kept in a written log at the installation site; vent risers installed at the appropriate height for class of product; drop tube with automatic shutoff at 95 percent; and spill containment installed at the fill.

ATCP 93.500(6)(b)4.b. b. Tanks ballasted under this paragraph shall have a fully functional electronic interstitial monitoring system installed prior to operation.

ATCP 93.500(6)(c) (c) Piping.

ATCP 93.500(6)(c)1. 1. Piping shall be shown to be leak-free by testing before backfilling and after backfilling.

ATCP 93.500(6)(c)2. 2. Pressure piping, or suction piping with a check valve located at the tank, shall pass a precision tightness test in accordance with s. ATCP 93.515 (4) (a) 1. before being placed into service.

ATCP 93.500(6)(c)3. 3. Piping that has leak detection provided by electronic line leak detection shall have the leak detection system certified as operable by performing a functional leak test in accordance with s. ATCP 93.515 (8) (e) before the piping is placed into service.

ATCP 93.500(6)(c)4. 4. Any aboveground product or vent piping that is adjacent to or in the path of motorized vehicles or equipment shall have vehicle collision protection meeting the performance requirements in s. ATCP 93.430, unless approved otherwise by the authorized agent or the department.

ATCP 93.500(6)(c)5. 5. Vent piping shall meet the requirements of NFPA 30 Subchapter 27.8 except the termination height of normal vent piping for Class II and Class III liquids shall be a minimum of 4 feet above the ordinary snow line.

ATCP 93.500(6)(d) (d) Sumps.

ATCP 93.500(6)(d)1. 1. Secondary containment sumps shall be fabricated and installed in a manner that prevents release of liquids. These sumps shall be tested for leaks hydrostatically at installation, in accordance with the manufacturer’s instructions and the adopted standard PEI RP 1200, except as provided in subd. 2.

ATCP 93.500(6)(d)2. 2. The testing may be omitted for a sump that has continuous electronic pressure, vacuum, or liquid-filled interstitial monitoring in addition to double-wall construction, if the monitoring system is tested at installation to verify that it operates in accordance with the manufacturer’s specifications.

ATCP 93.500(6)(e) (e) Installation checklist. Upon completion of any installation of new or replacement shop-built tanks or piping, or any system modification or upgrade that requires plan approval or registration or permitting, the certified installer shall provide the authorized agent or the department with a completed tank installation checklist, form TR-WM-138.

ATCP 93.500 Note Note: Form TR-WM-138 UST, Checklist for Underground Tank Installation, is available from the Bureau of Weights and Measures, P. O. 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/PetroleumHazStorageTanksForms.aspx.

ATCP 93.500 Note Note: Section ATCP 93.140 (3) (c) requires the tank installation checklist to be submitted to the department as part of the tank registration process.

ATCP 93.500 Note Note: Tank permit shall be obtained prior to operation of the tank as required by s. ATCP 93.145 (2).

ATCP 93.500(7) (7) Repairs.

ATCP 93.500(7)(a) (a) General. Owners and operators of underground tank systems shall ensure that repairs will prevent releases due to structural failure or corrosion as long as the tank system is used to store regulated substances.

ATCP 93.500(7)(b) (b) Standards. Repairs to underground tank systems shall be made by the manufacturer’s authorized representative or in accordance with a standard developed by a nationally recognized association or an independent testing laboratory that is acceptable to the department.

ATCP 93.500 Note Note: The department accepts use of the following standards in performing repairs under this paragraph, in addition to the applicable codes and standards adopted in s. ATCP 93.200: National Leak Prevention Association: NLPA Standard 631. This standard is available from NLPA at http://www.nlpa-online.org/standards.html. Fiberglass Tank and Pipe Institute: Recommended Practice T-95-02, Remanufacturing of Fiberglass Reinforced Plastic (FRP) Underground Storage Tanks. This standard is available by contacting FTPI at http://www.fiberglasstankandpipe.com.

ATCP 93.500(7)(c) (c) Tank,pipe, containment, or fitting repair and replacement.

ATCP 93.500(7)(c)1. 1. Metal tanks, pipe, and fittings that have released product as a result of corrosion or other damage shall be replaced. Non-corrodible pipe and fittings that have released product shall be replaced or repaired in accordance with the manufacturer’s specifications. Damaged spill basins and containment sumps shall be replaced or repaired in accordance with the manufacturer’s specifications using a manufacturer-designed replacement insert or a complete factory-built, field-installed repair kit. Containment sump penetration boots shall be replaced or repaired in accordance with either manufacturer specifications or by other methods approved by the department.

ATCP 93.500(7)(c)2. 2. Replacement flex connectors shall be placed within a containment sump so that it contains the entire flex connector for future accessibility and replacement.

ATCP 93.500(7)(d) (d) Tank-system site assessment. When repairs are made to piping or fittings that have released product to the environment, an assessment of the piping run, to identify points of release, shall be performed in accordance with ss. ATCP 93.575 to 93.585.

ATCP 93.500(7)(e) (e) Precision tightness testing. Repaired tanks and piping shall have precision tightness testing in accordance with s. ATCP 93.515 (4) before being placed back into service.

ATCP 93.500(7)(f) (f) Ullage portion. Any repair that affects the ullage portion of a tank shall include a tightness test of the ullage portion in accordance with s. ATCP 93.515 (10) before the tank is placed back in service.

ATCP 93.500(7)(g) (g) Interstitial space. Any repair that affects any portion of secondary containment for a UST system shall include testing of the affected portion in accordance with the methods prescribed in sub. (6) (b), (c), and (d) to verify that the containment complies with this chapter before that portion is placed back into service.

ATCP 93.500(7)(h) (h) Spill containment equipment. Repaired spill containment equipment shall be tested in accordance with the methods prescribed in s. ATCP 93.505 (2) (a) 3. before it is placed back into service.

ATCP 93.500(7)(i) (i) Containment sumps. Any repair that affects any portion of containment sump for a UST system shall include testing of the affected portion in accordance with the methods prescribed in sub. (6) (d) to verify that the containment complies with this chapter before that portion is placed back into service.

ATCP 93.500(7)(j) (j) Overfill prevention equipment. Repaired overfill containment equipment shall be tested in accordance with the methods prescribed in s. ATCP 93.505 (2) (b) 2. before it is placed back into service.

ATCP 93.500(7)(k) (k) Records and reporting.

ATCP 93.500(7)(k)1. 1. Any repair to below-grade tank system components below the top of a shear valve, or to leak detection equipment that affects the capability of the leak detection system to detect a leak, shall be recorded on the department’s TR-WM-136 form.

ATCP 93.500 Note Note: Form TR-WM-136–STI SP031 Tank System Repair Report is available from the Bureau of Weights and Measures, P. O. 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/PetroleumHazStorageTanksForms.aspx.

ATCP 93.500(7)(k)2. 2. A copy of the completed TR-WM-136 form shall be provided to the tank system operator.

ATCP 93.500(7)(k)3. 3. The tank system operator shall have the completed TR-WM-136 form on site and available for inspection within 30 days after receiving it from the party that performed the repair, except as provided in sub. (9) (b) 2. for unattended sites.

ATCP 93.500(7)(k)4. 4. Repairs that are recorded under subd. 1. because they affect the capability of the leak detection equipment to detect a leak shall be reported to the department within 15 days of the repair.

ATCP 93.500(8) (8) Inspection, maintenance, and periodic testing of ust systems.

ATCP 93.500(8)(a) (a) Operators of new and existing UST systems shall conduct routine and periodic inspection and maintenance in accordance with the applicable sections of PEI RP900, except that Section 6, Daily UST Inspection Checklist items may be performed at least monthly rather than daily.

ATCP 93.500(8)(b) (b) Any secondary containment sump:

ATCP 93.500(8)(b)1. 1. With a tear, crack, or hole shall be either repaired with department-approved methods to be liquid-tight or replaced with equipment meeting the criteria for new secondary containment.

ATCP 93.500(8)(b)2. 2. That is repaired under subd. 1. and subsequently becomes no longer liquid-tight shall then be replaced with equipment meeting the criteria for new secondary containment.

ATCP 93.500 Note Note: The one-time-repair limit in this section does not apply to connection boots or clamps. This section is directed instead at patches to the wall or floor of a sump, because these patches commonly have failed by delaminating.

ATCP 93.500(8)(b)3. 3. That may have released product to the environment is repaired or replaced under subd. 1. or 2. or when an initial sump is installed for preexisting piping on or after November 1, 2019, an assessment shall be performed in accordance with ss. ATCP 93.580 to 93.585.

ATCP 93.500 Note Note: See s. ATCP 93.605 (1) (g) for maintenance requirements relating to water levels in storage tanks for motor fuel dispensing facilities.

ATCP 93.500 Note Note: See s. ATCP 93.230 (8) to (10) for additional facility maintenance requirements.

ATCP 93.500(8)(c) (c)

ATCP 93.500(8)(c)1. 1. Except for double-walled containment with continuous electronic pressure, vacuum, or liquid-filled interstitial monitoring, all new or existing containment sumps that are part of a piping interstitial monitoring system shall be tested for leaks at least once every 3 years in accordance with one of the following methods:

ATCP 93.500(8)(c)1.a. a. Methods prescribed in sub. (6) (d).

ATCP 93.500(8)(c)1.b. b. A code of practice developed by a nationally recognized association or independent testing laboratory.

ATCP 93.500(8)(c)1.c. c. Another method approved by the department.

ATCP 93.500(8)(c)2. 2. Containment sump tightness testing shall be performed by a person with no personal or monetary interest in the facility and whose employer has no personal or monetary interest in the facility.

ATCP 93.500 Note Note: Requests for alternate method should be submitted on the TR-WM-157 form. This form 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.

ATCP 93.500(9) (9) Record keeping.

ATCP 93.500(9)(a) (a) General. Operators of new and existing underground storage tank systems shall maintain all of the following records:

ATCP 93.500(9)(a)1. 1. Documentation of any system repairs, alterations or upgrades, including software and hardware upgrades, and any inspections required under this chapter. These inspections include any precision tightness testing, ullage testing, or other testing that is required for determining whether a tank system component is liquid-tight or otherwise complying with this chapter.

ATCP 93.500 Note Note: For examples of this testing, see the testing for spill-containment basins in s. ATCP 93.505 (3) (b) 1., and the tightness testing described in the Note under s. ATCP 93.510 (1) (e).

ATCP 93.500(9)(a)2. 2. Documentation demonstrating conformance with leak detection requirements, and the manner in which these claims have been justified or tested by the equipment manufacturer and certified installer, including all of the following:

ATCP 93.500(9)(a)2.a. a. Information pertaining to the leak detection system, including the material approval as issued under s. ATCP 93.130 that was valid when the system was installed; operator manual; warranty; and documentation verifying that the equipment has been installed, programmed and tested to perform as required in this chapter.

ATCP 93.500(9)(a)2.b. b. Testing results obtained from leak detection equipment, as retained from the equipment’s printer or a handwritten log kept on site.

ATCP 93.500(9)(a)2.c. c. Documentation maintained for all calibration, inspection, monitoring, testing, repair, and annual performance verification of leak detection equipment permanently located onsite.

ATCP 93.500(9)(a)3. 3. Response to and investigation of leak detection alarms.

ATCP 93.500(9)(a)4. 4. Documentation maintained for all calibration, inspection, monitoring, testing, repair, and periodic performance verification of any corrosion protection equipment permanently located onsite.

ATCP 93.500(9)(a)5. 5. Analysis from a corrosion expert of site corrosion potential if corrosion protection equipment is not used.

ATCP 93.500(9)(a)6. 6. Records of any environmental information that has accrued for a site, such as from site inspections or investigations, phase I or II environmental site assessments, or repairs, or from tank-system site assessments conducted under ss. ATCP 93.560 to 93.585.

ATCP 93.500(9)(a)7. 7. Documentation of product inventory verification at facilities that are subject to the requirements of ch. ATCP 94.

ATCP 93.500(9)(a)8. 8. Results of functional testing of impact and emergency shutoff valves.

ATCP 93.500 Note Note: See NFPA 30A section 6.3.9.1 for testing requirements.

ATCP 93.500(9)(a)9. 9. Electrical continuity testing for dispensers of motor fuels that are Class I liquids.

ATCP 93.500(9)(a)10. 10. One set of stamped, approved plans and specifications and a copy of the approval letter.

ATCP 93.500(9)(a)11. 11. Documentation of compliance with the compatibility requirements in s. ATCP 93.680 (3) (c) 1. or (6) (c) 1. as applicable to the ethanol or biodiesel blend.

ATCP 93.500(9)(b) (b) Availability of records.