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 HistoryHistory: 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 93.530ATCP 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.