ATCP 93.420 NoteNote: Federal regulations, such as the Spill Prevention Control and Countermeasure requirements in 40 CFR part 112, may also apply to these tanks and be more restrictive but are not enforced by the department. ATCP 93.420(1)(c)(c) Tanks storing Class IIIB liquids that are not in the same diked area as a tank containing Class I, II, or IIIA liquids. ATCP 93.420(2)(a)(a) Weather exposure. Where a dike system is used to provide secondary containment for a tank system that is exposed to the weather, the dike system shall be constructed in accordance with NFPA 30 section 22.11; ACI 350.2R, if concrete is used; and this subsection. ATCP 93.420(2)(b)(b) Capacity. The capacity of a dike system open to the weather shall be 25 percent larger than required under NFPA 30 section 22.11.1.2 or 22.11.2.2. ATCP 93.420(2)(c)(c) Construction. The walls and floor of the dike system shall be constructed of earth, solid masonry, steel, precast concrete, engineered poured concrete, or other materials approved by the department. ATCP 93.420(2)(d)(d) Sealing. Dike systems with the walls and floor made of steel or poured or precast concrete shall have all cracks, seams, and joints sealed to be liquid-tight. ATCP 93.420(2)(e)1.1. New dike systems that have walls or floor made of earth or masonry shall be lined with a synthetic material having a permeability of no faster than 10-6 centimeters per second for the substance stored, except as provided in subd. 2. ATCP 93.420(2)(e)2.a.a. Tanks included in either subd. 2. b. or c. may have dike systems designed by an engineer, with the walls and floor made of clay material having a permeability of no faster than 10-6 centimeters per second for the substance stored. The dike system shall be designed to maintain the permeability for a minimum of 35 years. ATCP 93.420(2)(e)2.c.c. Single-bottom tanks that are constructed to ensure that any leaks from the bottom will drain to a conspicuous location and be contained there. ATCP 93.420 NoteNote: A method to achieve compliance with subd. 2. c. could include placing a tank over coarse aggregate that rests on a concrete base which is configured to provide the specified drainage and containment.
ATCP 93.420 NoteNote: As applied under s. ATCP 93.440 (2) and (3), API 653 requires routine inspection of field-erected tanks, and STI SP001 requires periodic inspection of shop-built tanks for evidence of leaks. ATCP 93.420(2)(f)1.1. Tanks may be installed within an existing dike system that has walls or floor made of earth or masonry only if all of the following conditions are met: ATCP 93.420(2)(f)1.c.c. All other tanks within the dike system have overfill protection as specified in NFPA 30 section 21.7.1. ATCP 93.420(2)(f)2.2. An existing dike system that has walls or floor made of earth or masonry may be expanded with materials which are similar to the materials in the existing walls and floor. After that expansion, tanks may be installed within the dike system only if all of the conditions in subd. 1. a. to c. are met. ATCP 93.420(2)(f)3.3. Tanks within an existing dike system that has walls or floor made of earth or masonry may be converted from storing an unregulated substance to storing a regulated substance only if all of the following conditions are met: ATCP 93.420(2)(f)3.c.c. All other tanks within the dike system have overfill protection as specified in NFPA 30 section 21.7.1. ATCP 93.420(2)(f)4.4. All new or replacement piping shall be routed over the top of the dike wall. ATCP 93.420(2)(g)(g) Approval and installation of synthetic liners. Synthetic liners shall be approved in accordance with s. ATCP 93.130 and installed under the direct supervision of a qualified representative of the manufacturer ATCP 93.420(2)(h)(h) Testing and maintenance. All new and existing synthetic liners and their seams shall be tested and maintained in accordance with the manufacturer’s recommendations. ATCP 93.420(2)(i)(i) Inspection of seams. Dike systems shall be constructed and maintained such that the liquid-tight seams can be visually inspected, except as provided in pars. (j) and (k). ATCP 93.420(2)(j)(j) Seam exceptions. The following dike systems are not required to have seams that can be visually inspected: ATCP 93.420(2)(j)1.1. Concrete or steel systems that are coated with a liquid-proof sprayed coating. ATCP 93.420(2)(k)(k) Existing seams. For existing dike systems, the seams directly under the tank are not required to be visible for inspection. ATCP 93.420(2)(L)(L) Separation. A separation of at least 2 feet shall be provided between any new tank and the toe of any new or existing dike wall, and a minimum of 3 inches shall be provided between the bottom of any new tank and the dike floor, to allow for visual inspection of the exterior tank surface — except this 3-inch requirement does not apply to tanks that comply with par. (e) 2. b. or c., or where otherwise approved by the department. ATCP 93.420(2)(m)(m) Drainage. Permanent containment structures shall be designed with a manually controlled drainage system to permit the drainage of liquids resulting from leaks, spills, and precipitation, such as a manually controlled pump or siphon or a manually controlled dike valve. ATCP 93.420(3)(a)(a) The department may accept secondary containment tanks of any size as providing acceptable secondary containment, except where dike systems are specifically required by this chapter. ATCP 93.420(3)(b)(b) Secondary containment tanks shall be provided with an approved method of interstitial leak detection. ATCP 93.420(3)(c)(c) For electronic interstitial monitoring, the sensor shall be of a normally-closed type. ATCP 93.420(3)(d)(d) Interstitial leak detection devices shall be tested for operability and functionality at installation. ATCP 93.420(4)(4) Piping. All underground piping connected to an aboveground tank shall comply with the secondary containment requirements in s. ATCP 93.400 (3). ATCP 93.420(5)(5) Transfer operations. In order to prevent a spill from moving beyond the loading or unloading area, any tank which has a capacity of 5,000 gallons or more and which is involved in transfer operations for bulk loading and unloading of tank cars or tank vehicles at facilities that refine, process, distribute, or manufacture liquids regulated under this code shall be provided with a catchment basin or treatment facility to contain the maximum capacity of the largest compartment of a tank car or tank vehicle loaded or unloaded at the facility. ATCP 93.420 NoteNote: This transfer requirement does not apply to transfers of used oil or fuel oil for heating or other burning purposes.
ATCP 93.420 NoteNote: For further information on industry practices for preventing or detecting releases with aboveground storage systems, and for protecting groundwater, surface water and soil in the event of a liquid release, see API Publication 340 — Liquid Release Prevention and Detection Measures for Aboveground Storage Facilities.
ATCP 93.420 HistoryHistory: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19. ATCP 93.425ATCP 93.425 Tank lining of aboveground storage tanks. ATCP 93.425(1)(1) The installation or repair of tank linings or coatings for aboveground storage tanks shall comply with API 652 and this section. ATCP 93.425(2)(2) The interior lining or coating of aboveground storage tanks or the repair of such linings or coatings shall be supervised and conducted by persons as required by the material manufacturer. ATCP 93.425(3)(3) Any openings cut for tank lining or similar purposes shall comply with API 653 for field-erected tanks and STI SP031 for shop-built tanks. ATCP 93.425 HistoryHistory: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19. ATCP 93.430(1)(1) Permanent vehicle collision protection shall be provided for any new or existing tank or system component that could result in a release of product when damaged, in any area where impact due to speed, turning, or backing of any type of motorized or self-propelled vehicle is likely to occur, except for tanks covered in ss. ATCP 93.610 (1) to (3) and 93.630. ATCP 93.430 NoteNote: Sections ATCP 93.610 (1) to (3) and 93.630 cover tank wagons, movable tanks, tank vehicles, and aboveground farm tanks. ATCP 93.430 NoteNote: Vehicle collision protection is required for tanks located outside or inside a building in motorized-vehicle or self-propelled-equipment traffic areas, where impact resulting from vehicle speed, turning or backing is a risk factor. For example, vehicle collision protection is required for tanks located adjacent to traffic areas that accommodate public and fleet fueling, service and delivery vehicles, self-propelled construction and service equipment, and forklift equipment.
ATCP 93.430 NoteVehicle collision protection is not required for tanks adjacent to vehicle and equipment service bays where traffic patterns and speed would not be expected to impact the tank system.
ATCP 93.430 NoteVehicle collision protection is generally not required at a terminal where roadways are clearly defined, access is restricted to authorized personnel, and vehicle drivers are familiar with the layout of the facilities.
ATCP 93.430(2)(2) At least 24 inches of clearance shall be provided between a vehicle impact barrier and the tank or system component to be protected. ATCP 93.430(3)(3) Impact barriers shall be designed to protect the tank or component from impact damage by the force of the largest vehicle routinely in the traffic area traveling at 5 miles per hour or at the average traveling speed, if higher than 5 miles per hour, except as provided in sub. (4). ATCP 93.430(4)(a)(a) For impact barriers designed primarily to protect from the impact of automobiles, the portion determined to be most vulnerable to vehicle impact shall be capable of withstanding a single impact of 12,000-lb force applied at 10 miles per hour or equivalent impact energy. ATCP 93.430(4)(b)(b) The impact shall be applied using a minimum 0.5-inch thick steel plate having a frontal surface area of 12 inches by 12 inches centered at 18 inches above grade. ATCP 93.430 NoteNote: For many applications, the department will accept either D.O.T. guardrails or 4-inch steel posts filled with concrete, set at least 3 feet into the ground and spaced no more than 4 feet on center.
ATCP 93.430(5)(5) Vehicle impact barriers shall have a minimum height of 3 feet above grade. ATCP 93.430 HistoryHistory: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19. ATCP 93.440(1)(1) Application. All new and existing aboveground storage tanks shall be inspected in accordance with this section. ATCP 93.440(2)(2) Inspection of field-erected metallic aboveground storage tanks. ATCP 93.440(2)(a)(a) Metallic aboveground storage tanks within the scope of API 653 shall be inspected in accordance with API 653. ATCP 93.440(2)(b)(b) Initial inspections shall be conducted as required in Table 93.440. ATCP 93.440(2)(c)1.1. The agency conducting an API 653 inspection shall report all applicable information from the inspection on an API 653 tank inspection summary form supplied by the department. ATCP 93.440(2)(c)2.2. A copy of the API 653 tank inspection summary shall be provided to the tank owner or operator along with the complete API 653 inspection report. ATCP 93.440(2)(d)(d) The tank owner or operator shall have the API 653 inspection summary on site and available for inspection within 30 days after receiving it from the agency that performed the inspection. ATCP 93.440(2)(e)(e) For tanks undergoing a transition from storing an unregulated substance to storing a regulated substance, any inspection in Table 93.440 that has not occurred shall be performed before putting the regulated substance into the tank. For the purposes of this paragraph, the service date is the date the tank was initially placed into service after construction. Table 93.440
Inspection Type and Schedule
ATCP 93.440(3)(3) Inspection of shop-built metallic aboveground storage tanks. ATCP 93.440(3)(a)1.1. The owner or operator of all shop-built metallic aboveground fixed storage tanks shall have the tanks inspected in accordance with STI SP001, except as provided in subd. 2. ATCP 93.440(3)(a)2.a.a. An alternate inspection procedure that provides equivalent environmental and fire safety protection may be used if accepted in writing by the department, or if developed by the certifying engineer for a facility in accordance with the federal spill prevention control and countermeasure regulations in 40 CFR 112. ATCP 93.440(3)(a)2.b.b. This paragraph does not apply to tanks that have a capacity of less than 1,100 gallons. ATCP 93.440(3)(a)2.c.c. This paragraph does not apply to heating oil tanks or to tanks at farms and construction projects. ATCP 93.440 NoteNote: STI SP001 requires monthly and annual inspections and requires maintaining records of these inspections. For almost all ASTs that have a capacity of 5,000 gallons or less, these inspections are only required to be visual. For most tanks that have a capacity of more than 5,000 gallons, the requirements include, but are not limited to, having a certified inspection every 20 years, consisting of a visual exam and spot, ultrasonic examination, with no requirement for an integrity pressure test. STI SP001 includes optional checklists that may be used for the required record keeping. These checklists and a compendium that contains further guidance for these inspections are available from the Bureau of Weights and Measures, P. O. Box 8911, Madison, WI 53708-8911, or at telephone (608) 224-4942, or from the Bureau’s Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanksForms.aspx.
