ATCP 93.500(4)(a)(a) Underground storage tank systems shall be designed and constructed to allow access to all connections between the tank and piping, venting, and appurtenances that require maintenance, inspection or replacement. ATCP 93.500 NoteNote: Piping elbows are an example of connections that do not need access because typically they do not need maintenance or inspection. Valves, extractor fittings, flex connectors, corrosion-protection test connections, and overfill prevention devices are examples of connections that need this access.
ATCP 93.500(4)(b)(b) The means of access shall be sufficient in size to allow for installation, maintenance, and inspection of all system appurtenances. ATCP 93.500(4)(c)(c) The means of access shall allow sufficient clearance for proper drainage from surface water incursion. ATCP 93.500(5)(a)1.1. When any underground product piping is installed as part of a new tank system or when 50 percent or more of a run is replaced, the piping shall be provided with approved secondary containment with non-discriminating electronic interstitial monitoring, except as specified in subd. 2., sub. (1) (b), and s. ATCP 93.300 (7). ATCP 93.500 NoteNote: Underground fill piping is included in the piping that is addressed by this subdivision.
ATCP 93.500(5)(a)2.a.a. Sumps for new or replacement underground fill piping that does not drop vertically into a tank may be monitored visually on a monthly basis, instead of monitored with an electronic sensor. ATCP 93.500(5)(a)2.b.b. Secondary containment is not required for underground fill piping that drops vertically into a tank. ATCP 93.500(5)(a)2.c.c. Secondary containment is not required for pedestal-type suction pumps with a vertical riser that is readily visible and is located directly above the riser connection to the tank. ATCP 93.500(5)(b)(b) The material used for fabricating both the primary and secondary containment shall be listed in accordance with a standard that assures liquid- and vapor-tightness. ATCP 93.500 NoteNote: The UL 971 standard meets this requirement.
ATCP 93.500(5)(c)(c) All pipe connections provided at the dispenser and at the top of the tank that routinely contain product and are installed or replaced on or after February 1, 2009, shall be placed within a secondary containment sump. ATCP 93.500(5)(d)(d) All existing pipe connections at the top of the tank and beneath all freestanding pumps and dispensers that routinely contain product shall be placed within secondary containment sumps by January 1, 2021. ATCP 93.500(5)(e)(e) All pipe connections at a transition between aboveground and underground piping that are installed or replaced on or after February 1, 2009, shall be placed within a secondary containment sump at the time of installation or replacement. ATCP 93.500(5)(f)1.1. Secondary containment sumps provided under this subsection shall have non-discriminating electronic sensors to detect liquids located in the lowest collection point of the sump, unless approved otherwise by the department. ATCP 93.500(5)(f)2.2. Piping that is installed or replaced on or after August 1, 2009, at secondary containment sumps provided under this subsection may not pass through the bottom of the sump. ATCP 93.500(5)(f)3.3. All electrical conduit and wiring that is installed or replaced on or after August 1, 2009, at secondary containment sumps provided under this subsection for dispensers shall pass over the top of the sump wall rather than through the wall or bottom of the sump. ATCP 93.500 NoteNote: This subsection recognizes existing dispenser pans, spray-on liners, brushed-on liners, formed-in-place containment products, and other effective secondary containment practices that are currently in use.
ATCP 93.500(5)(g)(g) A tank-connection sump is not required for a safe suction piping system, installed before August 1, 2009, unless 50 percent or more of a run is replaced after that date. ATCP 93.500(5)(h)(h) Secondary containment is not required for a pipe manifold connecting 2 or more tanks, installed before August 1, 2009. 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)1.1. Tanks shall have an air pressure and soap test performed after unloading. 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 NoteNote: 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 NoteNote: 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)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)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 NoteNote: 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 NoteNote: Tank permit shall be obtained prior to operation of the tank as required by s. ATCP 93.145 (2). 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 NoteNote: 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)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)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(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)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 NoteNote: 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 NoteNote: 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 NoteNote: See s. ATCP 93.230 (8) to (10) for additional facility maintenance requirements.
