25270.2.

 For purposes of this chapter, the following definitions apply:

(a) “Aboveground storage tank” or “storage tank” means a tank that has the capacity to store 55 gallons or more of petroleum and that is substantially or totally above the surface of the ground, except that, for purposes of this chapter, “aboveground storage tank” or “storage tank” includes a tank in an underground area. “Aboveground storage tank” does not include any of the following:

(1) A pressure vessel or boiler that is subject to Part 6 (commencing with Section 7620) of Division 5 of the Labor Code.

(2) A tank containing hazardous waste, as described in subdivision (g) of Section 25316, if the Department of Toxic Substances Control has issued the person owning or operating the tank a hazardous waste facilities permit for the storage tank.

(3) An aboveground oil production tank that is subject to Section 3106 of the Public Resources Code.

(4) Oil-filled electrical equipment, including, but not limited to, transformers, circuit breakers, or capacitors, if the oil-filled electrical equipment meets either of the following conditions:

(A) The equipment contains less than 10,000 gallons of dielectric fluid.

(B) The equipment contains 10,000 gallons or more of dielectric fluid with PCB levels less than 50 parts per million, appropriate containment or diversionary structures or equipment are employed to prevent discharged oil from reaching a navigable water course, and the electrical equipment is visually inspected in accordance with the usual routine maintenance procedures of the owner or operator.

(5) A tank regulated as an underground storage tank under Chapter 6.7 (commencing with Section 25280) of this division and Chapter 16 (commencing with Section 2610) of Division 3 of Title 23 of the California Code of Regulations and that does not meet the definition of a tank in an underground area.

(6) A transportation-related tank facility, subject to the authority and control of the United States Department of Transportation, as defined in the Memorandum of Understanding between the Secretary of Transportation and the Administrator of the United States Environmental Protection Agency, dated November 24, 1971, set forth in Appendix A to Part 112 (commencing with Section 112.1) of Subchapter D of Chapter I of Title 40 of the Code of Federal Regulations.

(b) “Board” means the State Water Resources Control Board.

(c) (1) “Certified Unified Program Agency” or “CUPA” means the agency certified by the Secretary for Environmental Protection to implement the unified program specified in Chapter 6.11 (commencing with Section 25404) within a jurisdiction.

(2) “Participating Agency” or “PA” means an agency that has a written agreement with the CUPA pursuant to subdivision (d) of Section 25404.3, and is approved by the secretary, to implement and enforce the unified program element specified in paragraph (2) of subdivision (c) of Section 25404, in accordance with Sections 25404.1 and 25404.2.

(3) (A) “Unified Program Agency” or “UPA” means the CUPA, or its participating agencies to the extent that each PA has been designated by the CUPA, pursuant to a written agreement, to implement and enforce the unified program element specified in paragraph (2) of subdivision (c) of Section 25404. The UPAs have the responsibility and authority, to the extent provided by this chapter and Sections 25404.1 and 25404.2, to implement and enforce the requirements of this chapter.

(B) After a CUPA has been certified by the secretary, the unified program agency shall be the only agency authorized to enforce the requirements of this chapter.

(C) This paragraph does not limit the authority or responsibility granted to the office, the board, and the regional boards by this chapter.

(d) “Office” means the Office of the State Fire Marshal.

(e) “Operator” means the person responsible for the overall operation of a tank facility.

(f) “Owner” means the person who owns the tank facility or part of the tank facility.

(g) “Person” means an individual, trust, firm, joint stock company, corporation, including a government corporation, partnership, limited liability company, or association. “Person” also includes any city, county, district, the University of California, the California State University, the state, any department or agency thereof, and the United States, to the extent authorized by federal law.

(h) “Petroleum” means crude oil, or a fraction thereof, that is liquid at 60 degrees Fahrenheit temperature and 14.7 pounds per square inch absolute pressure.

(i) “Regional board” means a California regional water quality control board.

(j) “Release” means any spilling, leaking, pumping, pouring, emitting, emptying, discharging, escaping, leaching, or disposing into the environment.

(k) “Secretary” means the Secretary for Environmental Protection.

(l) “Storage” or “store” means the containment, handling, or treatment of petroleum, for a period of time, including on a temporary basis.

(m) “Storage capacity” means the aggregate capacity of all aboveground tanks at a tank facility.

(n) “Tank facility” means one or more aboveground storage tanks, including any piping that is integral to the tanks, that contain petroleum and that are used by an owner or operator at a single location or site. For purposes of this chapter, a pipe is integrally related to an aboveground storage tank if the pipe is connected to the tank and meets any of the following:

(1) The pipe is within the dike or containment area.

(2) The pipe is between the containment area and the first flange or valve outside the containment area.

(3) The pipe is connected to the first flange or valve on the exterior of the tank, if state or federal law does not require a containment area.

(4) The pipe is connected to a tank in an underground area.

(o) “Tank in an underground area” means a tank to which all of the following apply:

(1) The tank is located in a structure that is at least 10 percent below the ground surface, including, but not limited to, a basement, cellar, shaft, pit, or vault.

(2) The structure in which the tank is located, at a minimum, provides for secondary containment of the contents of the tank, piping, and ancillary equipment, until cleanup occurs.

(3) The tank meets one of the following conditions:

(A) The tank contains petroleum to be used or previously used as a lubricant or coolant in a motor engine or transmission, the tank is situated on or above the surface of the floor, and the structure in which the tank is located provides enough space for a physical inspection of the exterior of the tank except for the part of the tank in contact with the surface of the floor.

(B) The tank contains motor fuel, as defined in Section 280.12 of Title 40 of the Code of Federal Regulations, the tank is situated above the surface of the floor, and the structure in which the tank is located provides enough space for a physical inspection of the exterior of the tank, all piping connected to the tank including any portion of a vent line, vapor recovery line, or fill pipe that is beneath the surface of the ground, and all ancillary equipment.

25270.4.

 This chapter shall be implemented by the Unified Program Agency, in accordance with the regulations adopted by the office pursuant to Section 25270.4.1.

25270.4.1.

 (a) The office may adopt regulations implementing this chapter. The office shall also provide interpretation of this chapter to the UPAs, and oversee the implementation of this chapter by the UPAs.

(b) The office shall establish an advisory committee that includes representatives from regulated entities, appropriate trade associations, fire service organizations, federal, state, and local organizations, including UPAs, and other interested parties. The advisory committee shall act in an advisory capacity to the office in conducting its responsibilities.

(c) The office shall, in addition to any other requirements imposed pursuant to this chapter, train UPAs, ensure consistency with state law, to the maximum extent feasible, ensure consistency with federal enforcement guidance issued by federal agencies pursuant to subdivision (d), and support the UPAs in providing outreach to regulated persons regarding compliance with current local, state, and federal regulations relevant to the office’s obligations under this chapter.

(d) Any regulation adopted by the office pursuant to this section shall ensure consistency with the requirements for spill prevention, control, and countermeasure plans under Part 112 (commencing with Section 112.1) of Subchapter D of Chapter I of Title 40 of the Code of Federal Regulations, and shall include any more stringent requirements necessary to implement this chapter.

25270.12.

 (a) Any owner or operator of a tank facility who fails to prepare a spill prevention control and countermeasure plan in compliance with subdivision (a) of Section 25270.4.5, to file a tank facility statement pursuant to subdivision (a) of Section 25270.6, to submit the fee required by subdivision (b) of Section 25270.6, or to report spills as required by Section 25270.8, or who otherwise fails to comply with the requirements of this chapter, is subject to a civil penalty of not more than five thousand dollars ($5,000) for each day on which the violation continues. If the owner or operator commits a second or subsequent violation, a civil penalty of not more than ten thousand dollars ($10,000) for each day on which the violation continues may be imposed.

(b) (1) The civil penalties provided by this section may be assessed and recovered in a civil action brought by the city attorney or district attorney on behalf of the UPA.

(2) Fifty percent of all penalties assessed and recovered in a civil action brought on behalf of a UPA pursuant to this subdivision shall be deposited into a unified program account established by the UPA for the purpose of carrying out the functions of the unified program and 50 percent shall be paid to the office of the city attorney or district attorney, whoever brought that action.

(c) (1) The civil penalties provided in this section may be assessed and recovered in a civil action brought by the Attorney General on behalf of the office, the board, or a regional board, or on behalf of the people of the State of California.

(2) All penalties assessed and recovered in a civil action brought pursuant to this subdivision shall be deposited in the Waste Discharge Permit Fund created pursuant to Section 13260 of the Water Code. These moneys shall be separately accounted for, and shall be expended by the board, upon appropriation by the Legislature, to assist regional boards and other public agencies with authority to clean up waste or abate the effects of the waste, in cleaning up or abating the effects of the waste on waters of the state, or for the same purposes for which the State Water Pollution Cleanup and Abatement Account may be expended pursuant to Section 13443 of the Water Code.

(d) The city attorney, district attorney, or the Attorney General may seek to enjoin, in any court of competent jurisdiction, any person believed to be in violation of this chapter.

(e) The penalties specified in this section are in addition to any other penalties provided by law.

25270.12.1.

 (a) An owner or operator of a tank facility who fails to prepare a spill prevention control and countermeasure plan in compliance with subdivision (a) of Section 25270.4.5, to file a tank facility statement pursuant to subdivision (a) of Section 25270.6, to submit the fee required by subdivision (b) of Section 25270.6, or to report spills as required by Section 25270.8, or who otherwise fails to comply with the requirements of this chapter is liable to the UPA for an administrative penalty of not more than five thousand dollars ($5,000) for each day on which the violation continues. If the owner or operator commits a second or subsequent violation, an administrative penalty of not more than ten thousand dollars ($10,000) for each day on which the violation continues may be imposed.

(b) The administrative penalties assessed by a UPA shall be deposited into a unified program account established by the UPA for the purpose of carrying out the functions of the unified program.

(c) When a UPA issues an enforcement order or assesses an administrative penalty, or both, for a violation of this chapter, the administering agency shall utilize the administrative enforcement procedures specified in Sections 25404.1.1 and 25404.1.2.

(d) The administrative penalties specified in this section are in addition to any other penalties provided by law, except for a violation for which a civil penalty under Section 25270.12 has already been imposed for the same violation.

25270.12.5.

 (a) A person who knowingly violates Section 25270.4.5, 25270.6, or 25270.8 after reasonable notice of the violation is, upon conviction, guilty of a misdemeanor.

(b) This section does not preempt any other applicable criminal or civil penalties.

25281.

 For purposes of this chapter, the following definitions apply:

(a) “Automatic line leak detector” means any method of leak detection, as determined in regulations adopted by the board, that alerts the owner or operator of an underground storage tank to the presence of a leak. “Automatic line leak detector” includes, but is not limited to, any device or mechanism that alerts the owner or operator of an underground storage tank to the presence of a leak by restricting or shutting off the flow of a hazardous substance through piping, or by triggering an audible or visual alarm, and that detects leaks of three gallons or more per hour at 10 pounds per square inch line pressure within one hour.

(b) “Board” means the State Water Resources Control Board. “Regional board” means a California regional water quality control board.

(c) “Compatible” means the ability of two or more substances to maintain their respective physical and chemical properties upon contact with one another for the design life of the tank system under conditions likely to be encountered in the tank system.

(d) (1) “Certified Unified Program Agency” or “CUPA” means the agency certified by the Secretary for Environmental Protection to implement the unified program specified in Chapter 6.11 (commencing with Section 25404) within a jurisdiction.

(2) “Participating Agency” or “PA” means an agency that has a written agreement with the CUPA pursuant to subdivision (d) of Section 25404.3, and is approved by the secretary to implement or enforce the unified program element specified in paragraph (3) of subdivision (c) of Section 25404, in accordance with Sections 25404.1 and 25404.2.

(3) “Unified Program Agency” or “UPA” means the CUPA, or its participating agencies to the extent each PA has been designated by the CUPA, pursuant to a written agreement, to implement or enforce the unified program element specified in paragraph (3) of subdivision (c) of Section 25404. For purposes of this chapter, a UPA has the responsibility and authority, to the extent provided by this chapter and Sections 25404.1 and 25404.2, to implement and enforce only those requirements of this chapter listed in paragraph (3) of subdivision (c) of Section 25404 and the regulations adopted to implement those requirements. Except as provided in Section 25296.09, after a CUPA has been certified by the secretary, the UPA shall be the only local agency authorized to enforce the requirements of this chapter listed in paragraph (3) of subdivision (c) of Section 25404 within the jurisdiction of the CUPA. This paragraph shall not be construed to limit the authority or responsibility granted to the board and the regional boards by this chapter to implement and enforce this chapter and the regulations adopted pursuant to this chapter.

(e) “Department” means the Department of Toxic Substances Control.

(f) “Facility” means any one, or combination of, underground storage tanks used by a single business entity at a single location or site.

(g) “Federal act” means Subchapter IX (commencing with Section 6991) of Chapter 82 of Title 42 of the United States Code, as added by the Hazardous and Solid Waste Amendments of 1984 (P.L. 98-616), or as it may subsequently be amended or supplemented.

(h) “Hazardous substance” means either of the following:

(1) All of the following liquid and solid substances, unless the department, in consultation with the board, determines that the substance could not adversely affect the quality of the waters of the state:

(A) Substances on the list prepared by the Director of Industrial Relations pursuant to Section 6382 of the Labor Code.

(B) Hazardous substances, as defined in Section 25316.

(C) Any substance or material that is classified by the National Fire Protection Association (NFPA) as a flammable liquid, a class II combustible liquid, or a class III-A combustible liquid.

(2) Any regulated substance, as defined in subsection (7) of Section 6991 of Title 42 of the United States Code, as that section reads on January 1, 2012, or as it may subsequently be amended or supplemented.

(i) “Local agency” means the local agency authorized, pursuant to Section 25283, to implement this chapter.

(j) “Operator” means any person in control of, or having daily responsibility for, the daily operation of an underground storage tank system.

(k) “Owner” means the owner of an underground storage tank.

(l) “Person” means an individual, trust, firm, joint stock company, corporation, including a government corporation, partnership, limited liability company, or association. “Person” also includes any city, county, district, the state, another state of the United States, any department or agency of this state or another state, or the United States to the extent authorized by federal law.

(m) “Pipe” means any pipeline or system of pipelines that is used in connection with the storage of hazardous substances and that is not intended to transport hazardous substances in interstate or intrastate commerce or to transfer hazardous materials in bulk to or from a marine vessel.

(n) “Primary containment” means the first level of containment, such as the portion of a tank that comes into immediate contact on its inner surface with the hazardous substance being contained.

(o) “Product tight” means impervious to the substance that is contained, or is to be contained, so as to prevent the seepage of the substance from the containment.

(p) “Release” means any spilling, leaking, emitting, discharging, escaping, leaching, or disposing from an underground storage tank into or on the waters of the state, the land, or the subsurface soils.

(q) “Secondary containment” means the level of containment external to, and separate from, the primary containment.

(r) “Single walled” means construction with walls made of only one thickness of material. For the purposes of this chapter, laminated, coated, or clad materials are considered single walled.

(s) “Special inspector” means a professional engineer, registered pursuant to Chapter 7 (commencing with Section 6700) of Division 3 of the Business and Professions Code, who is qualified to attest, at a minimum, to structural soundness, seismic safety, the compatibility of construction materials with contents, cathodic protection, and the mechanical compatibility of the structural elements of underground storage tanks.

(t) “Storage” or “store” means the containment, handling, or treatment of hazardous substances, either on a temporary basis or for a period of years. “Storage” or “store” does not include the storage of hazardous wastes in an underground storage tank if the person operating the tank has been issued a hazardous waste facilities permit by the department pursuant to Section 25200 or 25201.6 or granted interim status under Section 25200.5.

(u) “Tank” means a stationary device designed to contain an accumulation of hazardous substances which is constructed primarily of nonearthen materials, including, but not limited to, wood, concrete, steel, or plastic that provides structural support.

(v) “Tank integrity test” means a test method capable of detecting an unauthorized release from an underground storage tank consistent with the minimum standards adopted by the board.

(w) “Tank tester” means an individual who performs tank integrity tests on underground storage tanks.

(x) “Unauthorized release” means any release of any hazardous substance that does not conform to this chapter, including an unauthorized release specified in Section 25295.5.

(y) (1) “Underground storage tank” means any one or combination of tanks, including pipes connected thereto, that is used for the storage of hazardous substances and that is substantially or totally beneath the surface of the ground. “Underground storage tank” does not include any of the following:

(A) A tank with a capacity of 1,100 gallons or less that is located on a farm and that stores motor vehicle fuel used primarily for agricultural purposes and not for resale.

(B) A tank that is located on a farm or at the residence of a person, that has a capacity of 1,100 gallons or less, and that stores home heating oil for consumptive use on the premises where stored.

(C) Structures, such as sumps, separators, storm drains, catch basins, oil field gathering lines, refinery pipelines, lagoons, evaporation ponds, well cellars, separation sumps, and lined and unlined pits, sumps, and lagoons. A sump that is a part of a monitoring system required under Section 25290.1, 25290.2, 25291, or 25292 and sumps or other structures defined as underground storage tanks under the federal act are not exempted by this subparagraph.

(D) A tank holding hydraulic fluid for a closed loop mechanical system that uses compressed air or hydraulic fluid to operate lifts, elevators, and other similar devices.

(E) A tank in an underground area, as defined in Section 25270.2, and associated piping, that is subject to Chapter 6.67 (commencing with Section 25270).

(2) Structures identified in subparagraphs (C) and (D) of paragraph (1) may be regulated by the board and any regional board pursuant to the Porter-Cologne Water Quality Control Act (Division 7 (commencing with Section 13000) of the Water Code) to ensure that they do not pose a threat to water quality.

(z) “Underground tank system” or “tank system” means an underground storage tank, connected piping, ancillary equipment, and containment system, if any.

(aa) (1) “Unified program facility” means all contiguous land and structures, other appurtenances, and improvements on the land that are subject to the requirements of paragraph (3) of subdivision (c) of Section 25404.

(2) “Unified program facility permit” means a permit issued pursuant to Chapter 6.11 (commencing with Section 25404), and that encompasses the permitting requirements of Section 25284.

(3) “Permit” means a permit issued pursuant to Section 25284 or a unified program facility permit as defined in paragraph (2).

25281.

 For purposes of this chapter, and unless otherwise expressly provided, the following definitions apply:

(a) “Automatic line leak detector” means any method of leak detection, as determined in regulations adopted by the board, that alerts the owner or operator of an underground storage tank to the presence of a leak. “Automatic line leak detector” includes, but is not limited to, any device or mechanism that alerts the owner or operator of an underground storage tank to the presence of a leak by restricting or shutting off the flow of a hazardous substance through piping, or by triggering an audible or visual alarm, and that detects leaks of three gallons or more per hour at 10 pounds per square inch line pressure within one hour.

(b)  “Board” means the State Water Resources Control Board. “Regional board” means a California regional water quality control board.

(c)  “Compatible” means the ability of two or more substances to maintain their respective physical and chemical properties upon contact with one another for the design life of the tank system under conditions likely to be encountered in the tank system.

(d)  (1)  “Certified Unified Program Agency” or “CUPA” means the agency certified by the Secretary for Environmental Protection to implement the unified program specified in Chapter 6.11 (commencing with Section 25404) within a jurisdiction.

(2)  “Participating Agency” or “PA” means an agency that has a written agreement with the CUPA pursuant to subdivision (d) of Section 25404.3, and is approved by the secretary to implement or enforce the unified program element specified in paragraph (3) of subdivision (c) of Section 25404, in accordance with Sections 25404.1 and 25404.2.

(3)  “Unified Program Agency” or “UPA” means the CUPA, or its participating agencies to the extent each PA has been designated by the CUPA, pursuant to a written agreement, to implement or enforce the unified program element specified in paragraph (3) of subdivision (c) of Section 25404. For purposes of this chapter, a UPA has the responsibility and authority, to the extent provided by this chapter and Sections 25404.1 and 25404.2, to implement and enforce only those requirements of this chapter listed in paragraph (3) of subdivision (c) of Section 25404 and the regulations adopted to implement those requirements. Except as provided in Section 25296.09, after a CUPA has been certified by the secretary, the UPA shall be the only local agency authorized to enforce the requirements of this chapter listed in paragraph (3) of subdivision (c) of Section 25404 within the jurisdiction of the CUPA. This paragraph shall not be construed to limit the authority or responsibility granted to the board and the regional boards by this chapter to implement and enforce this chapter and the regulations adopted pursuant to this chapter.

(e)  “Department” means the Department of Toxic Substances Control.

(f)  “Facility” means any one, or combination of, underground storage tanks used by a single business entity at a single location or site.

(g)  “Federal act” means Subchapter IX (commencing with Section 6991) of Chapter 82 of Title 42 of the United States Code, as added by the Hazardous and Solid Waste Amendments of 1984 (Public Law 98-616), or as it may subsequently be amended or supplemented.

(h)  “Hazardous substance” means either of the following:

(1)  All of the following liquid and solid substances, unless the department, in consultation with the board, determines that the substance could not adversely affect the quality of the waters of the state:

(A)  Substances on the list prepared by the Director of Industrial Relations pursuant to Section 6382 of the Labor Code.

(B)  Hazardous substances, as defined in Section 25316.

(C)  Any substance or material that is classified by the National Fire Protection Association (NFPA) as a flammable liquid, a class II combustible liquid, or a class III-A combustible liquid.

(2)  Any regulated substance, as defined in subsection (7) of Section 6991 of Title 42 of the United States Code, as that section reads on January 1, 2012, or as it may subsequently be amended or supplemented.

(i)  “Local agency” means one of the following, as specified in subdivision (b) of Section 25283:

(1) The unified program agency.

(2) Before July 1, 2013, a city or county.

(3) On and after July 1, 2013, a city or county certified by the board to implement the local oversight program pursuant to Section 25297.01.

(j)  “Operator” means any person in control of, or having daily responsibility for, the daily operation of an underground storage tank system.

(k)  “Owner” means the owner of an underground storage tank.

(l) “Person” means an individual, trust, firm, joint stock company, corporation, including a government corporation, partnership, limited liability company, or association. “Person” also includes any city, county, district, the state, another state of the United States, any department or agency of this state or another state, or the United States to the extent authorized by federal law.

(m) “Pipe” means any pipeline or system of pipelines that is used in connection with the storage of hazardous substances and that is not intended to transport hazardous substances in interstate or intrastate commerce or to transfer hazardous materials in bulk to or from a marine vessel.

(n) “Primary containment” means the first level of containment, such as the portion of a tank that comes into immediate contact on its inner surface with the hazardous substance being contained.

(o) “Product tight” means impervious to the substance that is contained, or is to be contained, so as to prevent the seepage of the substance from the containment.

(p) “Release” means any spilling, leaking, emitting, discharging, escaping, leaching, or disposing from an underground storage tank into or on the waters of the state, the land, or the subsurface soils.

(q) “Secondary containment” means the level of containment external to, and separate from, the primary containment.

(r) “Single walled” means construction with walls made of only one thickness of material. For the purposes of this chapter, laminated, coated, or clad materials are considered single walled.

(s) “Special inspector” means a professional engineer, registered pursuant to Chapter 7 (commencing with Section 6700) of Division 3 of the Business and Professions Code, who is qualified to attest, at a minimum, to structural soundness, seismic safety, the compatibility of construction materials with contents, cathodic protection, and the mechanical compatibility of the structural elements of underground storage tanks.

(t) “Storage” or “store” means the containment, handling, or treatment of hazardous substances, either on a temporary basis or for a period of years. “Storage” or “store” does not include the storage of hazardous wastes in an underground storage tank if the person operating the tank has been issued a hazardous waste facilities permit by the department pursuant to Section 25200 or 25201.6 or granted interim status under Section 25200.5.

(u) “Tank” means a stationary device designed to contain an accumulation of hazardous substances which is constructed primarily of nonearthen materials, including, but not limited to, wood, concrete, steel, or plastic that provides structural support.

(v) “Tank integrity test” means a test method capable of detecting an unauthorized release from an underground storage tank consistent with the minimum standards adopted by the board.

(w) “Tank tester” means an individual who performs tank integrity tests on underground storage tanks.

(x) “Unauthorized release” means any release of any hazardous substance that does not conform to this chapter, including an unauthorized release specified in Section 25295.5.

(y) (1)  “Underground storage tank” means any one or combination of tanks, including pipes connected thereto, that is used for the storage of hazardous substances and that is substantially or totally beneath the surface of the ground. “Underground storage tank” does not include any of the following:

(A) A tank with a capacity of 1,100 gallons or less that is located on a farm and that stores motor vehicle fuel used primarily for agricultural purposes and not for resale.

(B) A tank that is located on a farm or at the residence of a person, that has a capacity of 1,100 gallons or less, and that stores home heating oil for consumptive use on the premises where stored.

(C) Structures, such as sumps, separators, storm drains, catch basins, oil field gathering lines, refinery pipelines, lagoons, evaporation ponds, well cellars, separation sumps, and lined and unlined pits, sumps, and lagoons. A sump that is a part of a monitoring system required under Section 25290.1, 25290.2, 25291, or 25292 and sumps or other structures defined as underground storage tanks under the federal act are not exempted by this subparagraph.

(D) A tank holding hydraulic fluid for a closed loop mechanical system that uses compressed air or hydraulic fluid to operate lifts, elevators, and other similar devices.

(E) A tank in an underground area, as defined in Section 25270.2, and associated piping, that is subject to Chapter 6.67 (commencing with Section 25270).

(2) Structures identified in subparagraphs (C) and (D) of paragraph (1) may be regulated by the board and any regional board pursuant to the Porter-Cologne Water Quality Control Act (Division 7 (commencing with Section 13000) of the Water Code) to ensure that they do not pose a threat to water quality.

(z) “Underground tank system” or “tank system” means an underground storage tank, connected piping, ancillary equipment, and containment system, if any.

(aa) (1)  “Unified program facility” means all contiguous land and structures, other appurtenances, and improvements on the land that are subject to the requirements of paragraph (3) of subdivision (c) of Section 25404.

(2) “Unified program facility permit” means a permit issued pursuant to Chapter 6.11 (commencing with Section 25404), and that encompasses the permitting requirements of Section 25284.

(3) “Permit” means a permit issued pursuant to Section 25284 or a unified program facility permit as defined in paragraph (2).

25281.6.

 (a) A tank located in a below-grade structure and connected to an emergency generator tank system, as defined in subdivision (c) of Section 25281.5, is exempt from the requirements of this chapter if all of the following conditions are met:

(1) The tank is situated above the surface of the floor in such a way that all of the surfaces of the tank can be visually inspected by either direct viewing, through the use of visual aids, including, but not limited to, mirrors, cameras, or video equipment, or monitored through the use of a continuous leak detection and alarm system capable of detecting unauthorized releases of hazardous substances.

(2) For a single-walled tank, in addition to all the other requirements in this section, the structure, or a separate discrete secondary structure able to contain the entire contents of the liquid stored in the tank, is sealed with a material compatible with the stored product.

(3) The owner or operator of the tank conducts visual inspections of the tank each time the emergency generator tank system is operated, or at least once a month, and maintains a log of inspection dates for review by the local agency.

(4) The tank or combination of tanks in the below-grade structure has a cumulative capacity of less than 1,320 gallons of diesel fuel.

(b) Nothing in this section excludes an emergency generator tank system from other applicable laws, codes, and regulations.

(c) The exclusion provided by this section does not apply if the board adopts regulations pursuant to Section 25299.3 that address the design, construction, upgrade, and monitoring of underground storage tanks contained in below-grade structures that are connected to emergency generator tank systems.