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DIVISION 3. STATE WATER RESOURCES CONTROL BOARD AND REGIONAL WATER QUALITY CONTROL BOARDS
2-CCR23div03.txt - CCR - 10/12/2006 0:00:00 - Regulation - CA

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EPA. (1982b). Test Methods for Evaluating Solid Waste. U.S. EPA Office of Solid Waste and Emergency Response. Washington, D. C. SW-846.



s 2610. Definitions/Applicability of Definitions.
(a) Unless the context requires otherwise, the terms used in this chapter shall have the definitions provided by the appropriate section of Chapter 6.7 of Division 20 of the Health and Safety Code, or by section 2611 of this article.
(b) Except as otherwise specifically provided herein, the following terms are defined in section 25281 of Chapter 6.7 of Division 20 of the Health and Safety Code:
Automatic Line Leak Detector
Board
Department
Facility
Federal Act
Local Agency
Owner
Pipe
Primary Containment
Product-Tight
Release
Secondary Containment
Single-Walled
Special Inspector
Storage/Store
SWEEPS
Tank
Tank Integrity Test
Tank Tester
Unauthorized Release
Underground Storage Tank
Underground Tank System/Tank System


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Section 25281, Health and Safety Code.





s 2611. Additional Definitions.
Unless the context requires otherwise, the following definitions shall apply to terms used in this chapter.
"Bladder system" means a flexible or rigid material which provides primary containment including an interstitial monitoring system designed to be installed inside an existing underground storage tank.
"Best management practice" means any underground storage tank system management and operation practice that is the most effective and practicable method of preventing or reducing the probability of a release.
"Cathodic protection tester" means any individual who can demonstrate an understanding of the principles and measurements of all common types of cathodic protection systems as applied to buried or submerged metallic piping and underground storage tank systems. Such an individual shall possess a current certificate from the National Association of Corrosion Engineers or the International Code Council, demonstrating education and experience in soil resistivity, stray current, structure-to-soil potential, and component electrical isolation measurements of buried or submerged metallic piping and underground storage tank systems.
"Coatings expert" means a person who, by reason of thorough training, knowledge and experience in the coating of metal surfaces, is qualified to engage in the practice of internal tank lining inspections. The term includes only those persons who are independent of any lining manufacturer or applicator and have no financial interest in the tank or tanks being monitored.
"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 underground storage tank.
"Connected piping" means all underground piping including valves, elbows, joints, flanges, and flexible connectors attached to a tank system through which hazardous substances flow. For the purpose of determining how much piping is connected to any individual underground storage tank system, the piping that joins two underground storage tank systems should be allocated equally between them.
"Continuous monitoring" means a system using equipment which routinely performs the required monitoring on a periodic or cyclic basis throughout each day.
"Corrosion specialist" means any individual who, by reason of thorough knowledge of the physical sciences and the principles of engineering and mathematics acquired by a professional education and related practical experience, is qualified to engage in the practice of corrosion control on buried or submerged metallic piping and underground storage tank systems. Such an individual shall possess a current certificate from the National Association of Corrosion Engineers as a corrosion specialist, or be a registered professional engineer with a current certificate or license requiring education and experience in corrosion control of buried or submerged metallic piping and underground storage tank systems.
"Decommissioned tank" means an underground storage tank which cannot be used for one or more of the following reasons: 1) the tank has been filled with an inert solid; 2) the fill pipes have been sealed; or, 3) the piping has been removed.
"Designated underground storage tank operator" or "designated UST operator" means one or more individuals designated by the owner to have responsibility for training facility employees and conducting monthly visual inspections at an underground storage tank facility. A "designated UST operator" is not considered the "operator" as defined in Chapter 6.7 of Division 20 of the Health and Safety Code, although the same individual may hold both positions.
"Dispenser" means an aboveground or underground device that is used for the delivery of a hazardous substance from an underground storage tank. Dispenser includes metering and delivery devices, and fabricated assemblies located therein.
"Emergency containment" means a containment system for accidental spills which are infrequent and unpredictable.
"Excavation zone" means the volume containing the tank system and backfill material bounded by the ground surface, walls, and floor of the pit and trenches into which the underground storage tank system is placed at the time of installation.
"Existing underground storage tank" means an underground storage tank installed prior to January 1, 1984. The term also includes an underground storage tank installed before January 1, 1987 and which is located on a farm, has a capacity greater than 1,100 gallons, and stores motor vehicle fuel used primarily for agricultural purposes and not for resale.
"Facility employee" means an individual who is employed on-site at an underground storage tank facility, and who may be called upon to respond to spills, overfills, or other problems associated with the operation of the underground storage tank system. A "facility employee" is not considered the "operator" as defined in Chapter 6.7 of Division 20 of the Health and Safety Code, although the same individual may hold both positions.
"Fail safe" means that a monitoring system will shut down the turbine pump in the event of a power outage, or when the monitoring system fails or is disconnected.
"Farm tank" means any one tank or a combination of manifolded tanks that: 1) are located on a farm; and, 2) holds no more than 1,100 gallons of motor vehicle fuel which is used primarily for agricultural purposes and is not held for resale.
"First ground water" means the uppermost saturated horizon encountered in a bore hole.
"Free product" refers to a hazardous substance that is present as a non-aqueous phase liquid (e.g., liquid not dissolved in water).
"Ground water" means subsurface water which will flow into a well.
"Hazardous substance" means a substance which meets the criteria of either subsection (1) or subsection (2) of section 25281(f) of the Health and Safety Code.
"Heating oil tank" means a tank located on a farm or at a personal residence and which holds no more than 1,100 gallons of home heating oil which is used consumptively at the premises where the tank is located.
"Holiday," when used with respect to underground storage tank coating or cladding, means a pinhole or void in a protective coating or cladding.
"Hydraulic lift tank" means 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.
"Inconclusive" means the conclusion of a statistical inventory reconciliation report that is not decisive as to whether a release has been detected.
"Independent testing organization" means an organization which tests products or systems for compliance with voluntary consensus standards. To be acceptable as an independent testing organization, the organization shall not be owned or controlled by any client, industrial organization, or any other person or institution with a financial interest in the product or system being tested. For an organization to certify, list, or label products or systems in compliance with voluntary consensus standards, it shall maintain formal periodic inspections of production of products or systems to ensure that a listed, certified, or labeled product or system continues to meet the appropriate standards.
"Independent third party" means independent testing organizations, consulting firms, test laboratories, not-for-profit research organizations and educational institutions with no financial interest in the matters under consideration. The term includes only those organizations which are not owned or controlled by any client, industrial organization, or any other institution with a financial interest in the matter under consideration.
"Integral secondary containment" means a secondary containment system manufactured as part of the underground storage tank.
"Interstitial Liquid Level Measurement" Method (as the term is used in section 25290.1 of the Health and Safety Code) or "Hydrostatic Monitoring" Method means a release detection method that continuously monitors the liquid level within a liquid-filled interstitial space of an underground storage tank. The term includes only those release detection systems that are capable of detecting a breach in the primary or secondary containment of the underground storage tank component(s) being monitored before the hazardous substance stored is released to the environment. To accomplish this, the liquid in the interstitial space shall be maintained at a pressure greater than the operating pressure found within the component(s) being monitored. This pressure may be achieved, for example, by adequately elevating the liquid reservoir or by pressurizing the liquid-filled interstice. Hydrostatic monitoring methods shall meet the requirements of section 2643, subdivision (f).
"Interstitial space" means the space between the primary and secondary containment systems.
"Leak threshold" means the value against which test measurements are compared and which serves as the basis for declaring the presence of a leak. The leak threshold is set by the manufacturer in order to meet state and federal requirements. Leak threshold is not an allowable leak rate.
"Liquid asphalt tank" means an underground storage tank which contains steam-refined asphalts.
"Liquefied petroleum gas tank" means an underground storage tank which contains normal butane, isobutane, propane, or butylene (including isomers) or mixtures composed predominantly thereof in a liquid or gaseous state having a vapor pressure in excess of 40 pounds per square inch absolute at a temperature of 100 degrees Fahrenheit.
"Maintenance" means the normal operational upkeep to prevent an underground storage tank system from releasing hazardous substances.
"Manufacturer" means any business which produces any item discussed in these regulations.
"Manual inventory reconciliation" means a procedure for determining whether an underground tank system is leaking based on bookkeeping calculations, using measured throughput and a series of daily inventory records taken manually by the tank owner or operator or recorded electronically. This terms does not include procedures which are based on statistical inventory reconciliation.
"Membrane liner" means any membrane sheet material used in a secondary containment system. A membrane liner shall be compatible with the substance stored.
"Membrane liner fabricator" means any company which converts a membrane liner into a system for secondary containment.
"Membrane manufacturer" means any company which processes the constituent polymers into membrane sheeting from which the membrane liner is fabricated into a system for secondary containment.
"Motor vehicle" means a self-propelled device by which any person or property may be propelled, moved, or drawn.
"Motor vehicle fuel tank" means an underground storage tank that contains a petroleum product. The definition does not include underground storage tanks that contain used oil.
"New underground storage tank" means an underground storage tank which is not an existing underground storage tank.
"Non-volumetric test" means a tank integrity test method that ascertains the physical integrity of an underground storage tank through review and consideration of circumstances and physical phenomena internal or external to the tank.
"Operational life" means the period beginning when installation of the tank system has begun until the time the tank system should be properly closed.
"Operator" means any person in control of, or having responsibility for, the daily operation of an underground storage tank system.
"Person", as defined in Chapter 6.7 of Division 20 of the Health and Safety Code includes any entity defined as a person under the Federal Act.
"Perennial ground water" means ground water that is present throughout the year.
"Petroleum" means petroleum including crude oil, or any fraction thereof, which is liquid at standard conditions of temperature and pressure, which means at 60 degrees Fahrenheit and 14.7 pounds per square inch absolute.
"Pipeline leak detector" means a continuous monitoring system for underground piping capable of detecting at any pressure, a leak rate equivalent to a specified leak rate and pressure, with a probability of detection of 95 percent or greater and a probability of false alarm of 5 percent or less.
"Probability of detection" means the likelihood, expressed as a percentage, that a test method will correctly identify a leaking underground storage tank.
"Probability of false alarm" means the likelihood, expressed as a percentage, that a test method will incorrectly identify a "tight" tank as a leaking underground storage tank.
"Qualitative release detection method" means a method which detects the presence of a hazardous substance or suitable tracer outside the underground storage tank being tested.
"Quantitative release detection method" means a method which determines the integrity of an underground storage tank by measuring a release rate or by determining if a release exceeds a specific rate.
"Release detection method or system" means a method or system used to determine whether a release of a hazardous substance has occurred from an underground tank system into the environment or into the interstitial space between an underground tank system and its secondary containment.
"Repair" means to restore a tank or underground storage tank system component that has caused a release of a hazardous substance from the underground storage tank system.
"Septic tank" means a tank designed and used to receive and process biological waste and storage.
"Service technician" means any individual who installs or tests monitoring equipment, or provides maintenance, service, system programming or diagnostics, calibration, or trouble-shooting for underground storage tank system components.
"Statistical inventory reconciliation" means a procedure to determine whether a tank is leaking based on the statistical analysis of measured throughput and a series of daily inventory records taken manually by the tank owner or operator or recorded electronically.
"Statistical inventory reconciliation provider" means the developer of a statistical inventory reconciliation method that meets federal and state standards as evidenced by a third-party evaluation conducted according to section 2643(f), or an entity that has been trained and certified by the developer of the method to be used. In either case, the provider shall have no direct or indirect financial interest in the underground storage tank being monitored.
"Storm water or wastewater collection system" means piping, pumps, conduits and any other equipment necessary to collect and transport the flow of surface water run-off resulting from precipitation, or domestic, commercial, or industrial wastewater to and from retention areas or any areas where treatment is designated to occur. The collection of storm water and wastewater does not include treatment except where incidental to conveyance.
"Substantially beneath the surface of the ground" means that at least 10 percent of the underground tank system volume, including the volume of any connected piping, is below the ground surface or enclosed below earthen materials.
"Sump," "pit," "pond," or "lagoon" means a depression in the ground which lacks independent structural integrity and depends on surrounding earthen material for structural support of fluid containment.
"Tank integrity test" means a test method that can ascertain the physical integrity of any underground storage tank. The term includes only test methods which are able to detect a leak of 0.1 gallons per hour with a probability of detection of at least 95 percent and a probability of false alarm of 5 percent or less. The test method may be either volumetric or non-volumetric in nature. A leak rate is reported using a volumetric test method, whereas, a non-volumetric test method reports whether a substance or physical phenomenon is detected which may indicate the presence of a leak.
"Unauthorized release" as defined in Chapter 6.7 of Division 20 of the Health and Safety Code does not include intentional withdrawals of hazardous substances for the purpose of legitimate sale, use, or disposal.
"Under-Dispenser Containment" means secondary containment that is located under a dispenser.
"Under-Dispenser spill containment or control system" means a device that is capable of preventing an unauthorized release from under the dispenser from entering the soil or groundwater or both.
"Upgrade" means the addition or retrofit of some systems such as cathodic protection, lining, secondary containment, or spill and overfill controls to improve the ability of an underground storage tank system to prevent the release of hazardous substances.
"Volumetric test" means a tank integrity test method that ascertains the physical integrity of any underground storage tank through review and comparison of tank volume.
"Voluntary consensus standards" means standards that shall be developed after all persons with a direct and material interest have had a right to express a viewpoint and, if dissatisfied, to appeal at any point (a partial list of the organizations that adopt voluntary consensus standards are shown in Appendix I, Table B).
"Wastewater treatment tank" means a tank designed to treat influent wastewater through physical, chemical, or biological methods and which is located inside a public or private wastewater treatment facility. The term includes untreated wastewater holding tanks, oil water separators, clarifies, sludge holding tanks, filtration tanks, and clarified water tanks that do not continuously contain hazardous substances.


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25281, 25282, 25283, 25284, 25284.1, 25290.1, 25292.3 and 25299.5(a), Health and Safety Code; 40 CFR 280.10 and 280.12.





s 2620. General Intent, Content, Applicability and Implementation of Regulations.
(a) The regulations in this chapter are intended to protect waters of the state from discharges of hazardous substances from underground storage tanks. These regulations establish construction requirements for new underground storage tanks; establish separate monitoring requirements for new and existing underground storage tanks; establish uniform requirements for unauthorized release reporting, and for repair, upgrade, and closure of underground storage tanks; and specify variance request procedures.
(b) Owners and operators shall comply with these regulations except as otherwise specifically provided herein. If the operator is not the owner, then the owner shall enter into a written contract with the operator requiring the operator to monitor the underground storage tank; maintain appropriate records; and implement reporting procedures as required by any applicable permit. Both the owner and operator are responsible for assuring that the underground storage tank system is repaired or upgraded in accordance with Article 6, or closed in accordance with Article 7, as appropriate.
(c) Counties shall implement the regulations in this chapter within both the incorporated and unincorporated areas of the county through the issuance of underground storage tank operating permits to underground storage tank owners. A city may, by ordinance, assume the responsibility for implementing the provisions of this chapter within its boundaries in accordance with section 25283 of the Health and Safety Code. Local agencies shall issue an operating permit for each underground storage tank, for several underground storage tanks, or for each facility, as appropriate, within their jurisdiction.
(d) Owners and operators shall comply with the construction and monitoring requirements of Article 3 (new underground storage tanks) or the monitoring requirements of Article 4 (existing underground storage tanks). However, owners of existing underground storage tanks which meet the construction and monitoring requirements of Article 3 may be issued operating permits pursuant to the requirements of Article 3 in lieu of the requirements of Article 4. In addition, owners or operators of underground storage tanks shall comply with the release reporting requirements of Article 5, the repair and upgrade requirements of Article 6, the closure requirements of Article 7, the underground storage tank operating permit requirements of Article 10 and the corrective action requirements of Article 11.


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25283, 25284, 25299.1 and 25299.3, Health and Safety Code; 40 CFR 280.





s 2621. Exemptions to the Regulations.
(a) The term "underground storage tank" excludes the following, except those of the following included in the definition of an underground storage tank in 40 CFR, part 280.12 as modified by paragraphs (b), (c), (d), of 40 CFR, part 280.10.
(1) A farm tank.
(2) A heating oil tank.

(3) A hydraulic lift tank in accordance with section 25281(x) of the Health and Safety Code.
(4) A liquefied petroleum gas tank.
(5) A liquid asphalt tank.
(6) A septic tank.
(7) A sump, pit, pond, or lagoon.
(8) A wastewater treatment tank except a tank which is part of an underground storage tank system.
(9) A pipeline located in a refinery or in an oil field unless the pipeline is connected to an underground storage tank.
(10) Storm water or wastewater collection systems.
(11) Tanks containing radioactive material such as spent fuel pools, radioactive waste storage tanks, and similar tanks under the Atomic Energy Act of 1954 (42 USC 2011) and following.
(12) An emergency containment tank kept empty to receive accidental spills and approved for such use by the appropriate local agency.
(13) Drums located in basements and which contain 55 gallons or less of a hazardous substance.
(14) Underground storage tanks containing hazardous wastes as defined in Section 25316 of the Health and Safety Code if the person owning or operating the underground storage tank has been issued a hazardous waste facilities permit for the underground storage tank by the Department of Toxic Substances Control pursuant to section 25200 of the Health and Safety Code or granted interim status under section 25200.5 of the Health and Safety Code.
(15) A tank and associated piping located in a vault or basement and which meets the requirements of section 25283.5 of the Health and Safety Code.
(16) Any structure specifically exempted by section 25281(x) of the Health and Safety Code.
(b) Sumps which are a part of a monitoring system required under Article 3 are considered part of the secondary containment or leak detection system of the primary containment and are required to meet the appropriate construction criteria.
(c) The owner of a farm or heating oil tank or any tank which is exempt from regulation as an underground storage tank by virtue of its use shall, prior to any change which results in the tank becoming subject to regulation, obtain a valid operating permit.


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25281, 25283.5 and 25299.1, Health and Safety Code; 40 CFR 280.10, 280.12.












s 2630. General Applicability of Article.
(a) The requirements in this article apply to owners of new underground storage tanks. In addition, the applicable repair and upgrade requirements in Article 6 shall be complied with.
(b) Sections 2631 and 2632 specify design, construction, and monitoring requirements for all new underground storage tanks. Sections 2633 and 2634 specify alternate design, construction, and monitoring requirements, in lieu of those specified in sections 2631 and 2632, for underground storage tanks installed before January 1, 1997 which store only motor vehicle fuel. Underground storage tanks constructed pursuant to the requirements specified in section 2633 in lieu of those specified in section 2631 shall be monitored in accordance with section 2634.
(c) All new underground storage tanks, piping, and secondary containment systems shall comply with sections 2635 and 2636.
(d) All monitoring equipment used to satisfy the requirements of this article shall meet the requirements of section 2643(f) and shall be installed and maintained such that the equipment is capable of detecting a leak at the earliest possible opportunity. Additionally, all monitoring equipment used to satisfy the requirements of this article shall be installed, calibrated, operated, and maintained in accordance with section 2638.


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25281, 25284.1, 25291 and 25292.3, Health and Safety Code; 40 CFR 280.20.





s 2631. Design and Construction Requirements for New Underground Storage Tanks.
(a) All new underground storage tanks including associated piping used for the storage of hazardous substances shall have primary and secondary containment. Primary containment shall be product-tight. Secondary containment may be manufactured as an integral part of the primary containment or it may be constructed as a separate containment system. Secondary containment systems shall be designed and constructed such that the secondary containment system can be periodically tested in accordance with section 2637(a).
(b) The design and construction of all primary containment including any integral secondary containment system, shall be approved by an independent testing organization in accordance with industry codes, voluntary consensus standards, or engineering standards. All other components used to construct the primary containment system, such as special accessories, fittings, coatings or linings, monitoring systems and level controls shall also be approved by an independent testing organization. This requirement became effective on July 1, 1991 for underground storage tanks; January 1, 1992 for piping; and shall be effective on January 1, 1995 for all other components. The exterior surface of underground storage tanks shall bear a marking, code stamp, or label showing the following minimum information:
(1) Engineering standard used;
(2) Nominal diameter in feet;
(3) Nominal capacity in gallons;
(4) Degree of secondary containment;

(5) Useable capacity in gallons;
(6) Design pressure in psig;
(7) Maximum operating temperature in degrees Fahrenheit;
(8) Construction materials;
(9) Year manufactured; and
(10) Identity of manufacturer.
(c) A primary containment system with or without an integral secondary containment system shall have wear plates (striker plates) installed, center to center, below all accessible openings. The plates shall be made of steel or other appropriate material if steel is not compatible with the hazardous substance stored. The width of the plate shall be at least eight inches on each side, or shall be equal to the area of the accessible opening or guide tube, whichever is larger. The thickness of the steel plate shall be at least 1/8 inch and those made of other materials shall be of sufficient thickness to provide equivalent protection. The plate, if under 1/4 inch thick, shall be rolled to the contours of the underground storage tank and all plates shall be bonded or tack welded in place. A drop tube-mounted bottom protector may fulfill this requirement.
(d) A secondary containment system which is not an integral part of primary containment shall be designed and constructed according to an engineering specification approved by a state registered professional engineer or according to a nationally recognized industry code or engineering standard. The engineering specification shall include the construction procedures. Materials used to construct the secondary containment system shall have sufficient thickness, density, and corrosion resistance to prevent structural weakening or damage to the secondary containment system as a result of contact with any released hazardous substance. The following requirements apply to these secondary containment systems:
(1) The secondary containment system shall be constructed to contain at least the following volumes:
(A) One hundred percent of the usable capacity of the primary containment system where only one primary container is within the secondary containment system.
(B) In the case of multiple primary containers within a single secondary containment system, the secondary containment system shall be large enough to contain 150 percent of the volume of the largest primary container within it, or 10 percent of the aggregate internal volume of all primary containers within the secondary containment system, whichever is greater. When all primary containers are completely enclosed within the secondary containment system, the restrictions of this subsection do not apply.
(2) If the secondary containment system is open to rainfall, it shall be constructed to accommodate the volume of precipitation which could enter the secondary containment system during a 24- hour, 25-year storm in addition to the volume specified in subsection (d)(1).
(3) If backfill material is placed in the secondary containment system, the volumetric requirements for the pore space shall be equal to the requirement in subsection (d)(1). The available pore space in the secondary containment system backfill shall be determined using standard engineering methods and safety factors. The specific retention and specific yield of the backfill material, the location of any primary container within the secondary containment, and the proposed method of operation for the secondary containment system shall be considered in determining the available pore space.
(4) The secondary containment system shall be equipped with a collection system to accumulate, temporarily store, and permit removal of any liquid within the system.
(5) The floor of the secondary containment system shall be constructed on a firm base and, if necessary for monitoring, shall be sloped to a collection sump. One or more access casings shall be installed in the sump and sized to allow removal of collected liquid. The access casing shall extend to the ground surface, be perforated in the region of the sump, and be covered with a locked waterproof cap or enclosed in a surface security structure that will protect the access casing(s) from entry of surface water, accidental damage, unauthorized access, and vandalism. A facility with locked gates will satisfy the requirements for protection against unauthorized access and vandalism. The casing shall have sufficient thickness to withstand all anticipated stresses with appropriate engineering safety factors and constructed of materials that will not be structurally weakened by the stored hazardous substance and will not donate, capture, or mask constituents for which analyses will be made.

(6) Secondary containment systems using membrane liners shall be approved by an independent testing organization in accordance with industry codes, voluntary consensus standards, or engineering standards. A membrane liner shall contain no primary nutrients or food-like substances attractive to rodents and shall meet the requirements in Table 3.1 after a 30-day immersion in the stored hazardous substance.

Table 3.1 Standards for Membrane Liners
Some Acceptable Test Methods (See Appendix I, Table A)
Unsupported Supported
Property Liners Liners Requirement
(A) Tensile strength ASTM D638 ASTM D751
Tensile strength Procedure B >300 lbs/in
at yield (Cut Strip Method) of width
Tensile strength >200 lbs/in
at break of width
(B) Permeability ASTM E96 ASTM E96 <0.65 gram/

meter<>2--
hr
(C) Seam strength ASTM D413 ASTM D751 = Parent
material
(D) Solubility ASTM D471 ASTM D471 <0.10% by
weight
(E) Puncture FTMS 101C 350 lbs.
Method 2031
FTMS 101C 80 lbs.
Method 2065
(F) Tear ASTM D751 125 lbs.
ASTM D1004
DIEC 50 lbs.


(7) A membrane liner, if used, shall be installed under the direct supervision of a representative of the membrane liner fabricator or a contractor certified by the fabricator.

(8) The excavation base and walls for a membrane liner shall be prepared to the membrane liner fabricator's specifications and shall be firm, smooth, and free of any sharp objects or protrusions.
(9) The site shall be assessed to ensure that the secondary containment is always above the ground water and not in a 25-year flood plain, unless the containment and monitoring designs are for use under such conditions.
(e) Laminated, coated, or clad materials shall be considered a single wall and do not fulfill the requirements of both primary and secondary containment.
(f) Underground storage tanks with integral secondary containment systems, which satisfy the construction requirements of subsection (b), fulfill the volumetric requirements for secondary containment specified in subsection (d)(1).
(g) Underground storage tanks with secondary containment systems shall be so designed and installed so that any loss of a hazardous substance from the primary containment will be detected by an interstitial monitoring device or method.
(h) An underground storage tank which contains motor vehicle fuel and which is designed with an integral secondary containment system shall provide 100 percent secondary containment unless it is equipped with the overfill prevention system in accordance with section 2635(b)(2)(C). In this case, the top portion of the tank, no greater than two feet wide along the length of the tank, may be single-walled.
(i) Tanks designed and constructed pursuant to the provisions of this section shall be monitored according to the provisions of section 2632.


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25281, 25284.1 and 25291, Health and Safety Code; 40 CFR 280.20.Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25281, 25284.1 and 25291, Health and Safety Code; 40 CFR 280.20.





s 2631.1. Compatibility and Permeability Testing Requirements for All New Underground Storage Tanks.
(a) Owners and operators must use an underground storage tank system made of or lined with materials that are compatible with the substance stored in the underground storage tank system.
(b) For underground storage tank system components installed on or after July 1, 2004, the applicable approvals required in subsections 2631(b) and (d) shall include a list of the compatible products tested and the measured product permeation rates, if such testing is required by the industry code or engineering standard used to evaluate the component. These results shall be provided to the local agency upon request.


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25281, 25284.1, 25286, 25291 and 25299, Health and Safety Code; and 40 CFR 280.20, 280.32 and 280.40-280.45.






s 2632. Monitoring and Response Plan Requirements for New Underground Storage Tanks Constructed Pursuant to Section 2631.
(a) This section is applicable only to underground storage tanks constructed pursuant to the requirements of section 2631.
(b) Owners or operators of underground storage tanks subject to this section shall implement a monitoring program approved by the local agency and specified in the underground storage tank operating permit. The program shall include interstitial space monitoring as described in subsection (c) and shall include the items listed in subsection (d).
(c) Monitoring of the interstitial space shall include either visual monitoring of the primary containment system as described in subsection (c)(1) or one or more of the methods listed in subsection (c)(2).
(1) A visual monitoring program shall incorporate all of the following:
(A) All exterior surfaces of the underground storage tanks and the surface of the floor directly beneath the underground storage tanks shall be capable of being monitored by direct viewing.
(B) Visual inspections shall be performed daily, except on weekends and recognized state and/or federal holidays. Inspections may be more frequent if required by the local agency or the local agency may reduce the frequency of visual monitoring at facilities where personnel are not normally present and inputs to and withdrawals from the underground storage tanks are very infrequent. In these instances, visual inspection shall be made weekly. The inspection schedule shall take into account the minimum anticipated time during which the secondary containment system is capable of containing any unauthorized release and the maximum length of time any hazardous substance released from the primary containment system will remain observable on the surface of the secondary containment system. The inspection schedule shall be such that inspections will occur on a routine basis when the liquid level in the tanks is at its highest. The inspection frequency shall be such that any unauthorized release will remain observable on the exterior of or the surface immediately beneath the underground storage tanks between visual inspections. The evaluation of the length of time the hazardous substance remains observable shall consider the volatility of the hazardous substance and the porosity and slope of the surface immediately beneath the tanks.
(C) The liquid level in the tank shall be recorded at the time of each inspection.
(D) If any liquid is observed around or beneath the primary containment system, the owner or operator shall, if necessary, have the liquid analyzed in the field using a method approved by the local agency or in a laboratory to determine if an unauthorized release has occurred. The owner or operator shall have a tank integrity test conducted, if necessary, to determine whether the primary containment system is leaking. If a leak is confirmed, the owner or operator shall comply with the applicable provisions of Article 5, Article 6, and Article 7.
(2) A monitoring program which relies on the mechanical or electronic detection of the hazardous substance in the interstitial space shall include one or more of the methods in Table 3.2. The following requirements shall apply when appropriate:
(A) The interstitial space of the tank shall be monitored using a continuous monitoring system which meets the requirements of section 2643(f).
(B) The continuous monitoring system shall be connected to an audible and visual alarm system approved by the local agency.
(C) For methods of monitoring where the presence of the hazardous substance is not determined directly, for example, where liquid level measurements in the interstitial space are used as the basis for determination, the monitoring program shall specify the proposed method(s) for determining the presence or absence of the hazardous substance in the interstitial space if the indirect methods indicate a possible unauthorized release.
(d) All monitoring programs shall include the following:

(1) A written procedure for monitoring which establishes:
(A) The frequency of performing the monitoring;
(B) The methods and equipment, identified by name and model, to be used for performing the monitoring;
(C) The location(s), as identified on a plot plan, where the monitoring will be performed;
(D) The name(s) and title(s) of the person(s) responsible for performing the monitoring and/or maintaining the equipment;
(E) The reporting format;
(F) The preventive maintenance schedule for the monitoring equipment. The maintenance schedule shall be in accordance with the manufacturer's instructions, and;
(G) A description of the training necessary for the operation of both the tank system and the monitoring equipment.
(2) A response plan which demonstrates, to the satisfaction of the local agency, that any unauthorized release will be removed from the secondary containment system within the time consistent with the ability of the secondary containment system to contain the hazardous substance, but not more than 30 calendar days or a longer period of time as approved by the local agency. The response plan shall include, but is not limited to, the following:
(A) A description of the proposed methods and equipment to be used for removing and properly disposing of any hazardous substances, including the location and availability of the required equipment if not permanently on-site, and an equipment maintenance schedule for the equipment located on-site.
(B) The name(s) and title(s) of the person(s) responsible for authorizing any work necessary under the response plan.
(e) When implementation of a monitoring program or any other condition indicates that an unauthorized release may have occurred, the owner or operator shall comply with the release reporting requirements of Article 5. If the release came from the tank system, the owner or operator shall replace, repair, or close the tank in accordance with Articles 3, 6, or 7, respectively.
Table 3.2 Methods of Monitoring for Hazardous Substances in the Interstitial
Space of an Underground Storage Tank System

Methods of Monitoring

Condition Pressure or
of the Type of Liquid Hazardous Vacuum
Secondary Substance Level Substance Vapor Loss
System [FN1] Stored Indicator Sensor [FN3] Monitor Detector [FN4]
[FN2]
Dry Volatile X X X X
Dry Nonvolatile X X X
Wet Volatile X X X
Wet Nonvolatile X X X

[FN1] A "dry" system does not contain liquid within the secondary containment during normal operating conditions while a "wet" system does.
[FN2] Includes continuously operated mechanical or electronic devices.
[FN3] Includes either qualitative or quantitative determinations of the presence of the hazardous substance.
[FN4] Detects changes in pressure or vacuum in the interstitial space of an underground storage tank with secondary containment.


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25281 and 25291, Health and Safety Code; 40 CFR 280.43.





s 2633. Alternate Construction Requirements for New Underground Storage Tanks Containing Motor Vehicle Fuel.
(a) This section sets forth alternate construction requirements for new underground storage tanks which contain only motor vehicle fuels. Owners or operators of new underground storage tanks which contain only motor vehicle fuels may comply with this section in lieu of section 2631. If the tanks are constructed in accordance with the requirements of this section, they shall be monitored in accordance with section 2634.
(b) Underground storage tanks used for storage of motor vehicle fuel and constructed in accordance with this section shall be composed of fiberglass-reinforced plastic, cathodically protected steel, or steel clad with fiberglass-reinforced plastic. These tanks shall be installed with the leak interception and detection system constructed in accordance with the requirements of subsections (d) through (f). The primary containment system shall meet the requirements of sections 2631(b) and 2631(c).
(c) Underground storage tanks used for storage of motor vehicle fuel that are constructed of materials other than those specified in subsection (b) shall be constructed in accordance with section 2631 and monitored in accordance with section 2631 and monitored in accordance with section 2632.
(d) The floor of a leak interception and detection system shall be constructed on a firm base and sloped to a collection sump. Methods of construction for a leak interception and detection system using membrane liners shall comply with the requirement of section 2631(d)(6).
(e) Access casings shall be installed in the collection sump of a secondary containment system which has backfill in the interstitial space. The access casing shall be:
(1) Designed and installed to allow the liquid to flow into the casing;
(2) Sized to allow efficient removal of collected liquid and to withstand all anticipated applied stresses using appropriate engineering safety factors;
(3) Constructed of materials that will not be structurally weakened by the stored hazardous substances or donate, capture, or mask constituents for which analyses will be made;
(4) Screened along the entire vertical zone of permeable material which may be installed between the primary container and the leak interception and detection system;
(5) Capable of preventing leakage of any hazardous substance from the casing to areas outside the leak interception and detection system;
(6) Extended to the ground surface and covered with a locked waterproof cap or enclosed in a secured surface structure that will protect the access casing(s) from entry of surface water, accidental damage, unauthorized access, and vandalism. A facility with locked gates will satisfy the requirements for protection against unauthorized access and vandalism; and
(7) Capable of meeting requirements of local well-permitting agencies.
(f) The leak interception and detection system shall prevent the leaked hazardous substance from entering ground water. The leak interception and detection system shall be situated above the highest anticipated ground water elevation. Proof that the leak interception and detection system will protect ground water shall be demonstrated by the owner or operator of the underground storage tank to the satisfaction of the local agency. In determining whether the leak interception and detection system will adequately protect ground water, the local agency shall consider the following:
(1) The containment volume of the leak interception and detection system;
(2) The maximum leak which could go undetected under the monitoring method required in section 2634 and the maximum period during which the leak will go undetected;
(3) The frequency and accuracy of the proposed method of monitoring the leak interception and detection system;
(4) The depth from the bottom of the leak interception and detection system to the highest anticipated level of ground water;
(5) The nature of the unsaturated soils under the leak interception and detection system and their ability to absorb contaminants or to allow movement of contaminants;
(6) The effect of any precipitation or subsurface infiltration on the movement of any leak of hazardous substance and the available volume of the leak interception and detection system; and
(7) The nature and timing of the response plan required by section 2634 to clean up any hazardous substances which have been discharged from the primary container.


Note: Authority cited: Sections 25299.3 and 25299.7, Health and Safety Code. Reference: Sections 25281 and 25291, Health and Safety Code; 40 CFR 280.20.





s 2634. Monitoring and Response Plan Requirements for New Underground Storage Tanks Containing Motor Vehicle Fuel and Constructed Pursuant to Section 2633.
(a) This section applies only to underground storage tanks containing motor vehicle fuel and which are constructed in accordance with section 2633.
(b) Owners or operators of tanks which are constructed pursuant to section 2633 and which contain motor vehicle fuel shall implement a monitoring program approved by the local agency and specified in the tank operating permit.
(c) New tanks which contain motor vehicle fuel and which are constructed in accordance with section 2633 shall be monitored as follows:
(1) The leak interception and detection system shall be monitored in accordance with subsection (d) of this section;
(2) The motor vehicle fuel inventory shall be reconciled according to the performance requirements in section 2646; and,
(3) All underground piping shall be tested and monitored in accordance with section 2636.
(d) Before implementing a monitoring program, the owner or operator shall demonstrate to the satisfaction of the local agency that the program is effective in detecting an unauthorized release from the primary container before it can escape from the leakinterception and detection system. A monitoring program for leak interception and detection systems shall meet the following requirements: (continued)
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