Section 2661 - Requirements for Repairing Underground Storage Tank(a) Before repairing an underground storage tank system, the owner or operator shall comply with applicable requirements of Article 5.(b) Before repairing an underground storage tank system, the owner or operator shall demonstrate to the satisfaction of the local agency that the conditions and requirements specified in section 2660(k) will be met. When selecting a method of repair, the owner or operator shall take into consideration whether the cause of failure is isolated to the actual failure, is affecting other areas of the underground storage tank, or if any other cause of failure is affecting the primary container.(c) A tank may be repaired once using the interior lining method specified in section 2663. A previously lined tank may not be repaired using the interior lining method.(d) Holes in steel tanks shall be plugged using self-tapping bolts, boiler plugs, water-tight hydraulic cement, or by welding. In addition, holes in steel and fiberglass tanks shall be repaired as follows: (1) Repair areas shall be covered with epoxy or isophthalic polyester based resin. The resin shall be compatible with the intended use of the tank.(2) Fiberglass cloth with a minimum weight of 1.5 ounces per yard that is silane-treated shall be worked completely into the resin base. The resin base shall be installed a minimum of two inches beyond the fiberglass cloth.(3) All repairs shall include installation of fiberglass cloth with a minimum dimension of 12 x 12 inches centered over the area to be repaired. Larger repairs shall require the cloth to be large enough to provide cloth coverage of at least five inches of cloth bonded to the tank wall, measured from the outermost edge of the repair to the cloth's edge.(4) A second layer of fiberglass cloth of the same weight as specified in subdivision (d)(2) above, shall be installed directly over the primary cloth layer and shall be cut to overlap the primary patch by 1.5 inches on all sides.(5) The repair shall be allowed sufficient cure time, as determined by the resin manufacturer, to provide an acceptable base for tank lining installation.(e) Metal piping, pipe fittings, or tank fittings that have released product as a result of corrosion or other damage shall be replaced. Non-metal piping, pipe fittings, or tank fittings shall be repaired or replaced in accordance with manufacturer specifications.(f) Tanks and piping which have been repaired shall be tested for tightness within 30 days following the date of completion of the repair. Tanks shall be tested in accordance with section 2643.1. Piping shall be tested in accordance with existing section 2636(f)(3) or 2643(c)(3), as applicable. Tanks or piping that fail this test shall be repaired in accordance with this section or closed in accordance with Article 7.(g) A vapor or ground water monitoring system shall be installed to continuously monitor a tank repaired by lining for future unauthorized releases, in accordance with section 2647 or 2648, if no secondary containment system exists.Cal. Code Regs. Tit. 23, § 2661
1. Amendment filed 8-9-91 as an emergency; operative 8-9-91. Text remains in effect uninterrupted pursuant to Health and Safety Code section 25299.7 (Register 92, No. 14).
2. Editorial correction of printing errors in HISTORY 1 (Register 92, No. 43).
3. Amendment of section heading and text filed 4-5-94; operative 5-5-94 (Register 94, No. 14).
4. Editorial correction of subsection (f) (Register 95, No. 43).
5. Amendment of subsection (c) filed 12-18-2007; operative 1-17-2008 (Register 2007, No. 51).
6. Amendment of subsections (b), (d)(2), (d)(4) and (f) and amendment of NOTE filed 8-27-2018; operative 10-1-2018 (Register 2018, No. 35). Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25292.1 and 25296, Health and Safety Code; and 40 CFR § 280.33.
1. Amendment filed 8-9-91 as an emergency; operative 8-9-91. Text remains in effect uninterrupted pursuant to Health and Safety Code section 25299.7 (Register 92, No. 14).
2. Editorial correction of printing errors in History1 (Register 92, No. 43).
3. Amendment of section heading and text filed 4-5-94; operative 5-5-94 (Register 94, No. 14).
4. Editorial correction of subsection (f) (Register 95, No. 43).
5. Amendment of subsection (c) filed 12-18-2007; operative 1-17-2008 (Register 2007, No. 51).
6. Amendment of subsections (b), (d)(2), (d)(4) and (f) and amendment of Note filed 8-27-2018; operative 10/1/2018 (Register 2018, No. 35).