PURPOSE: This rule sets the standards for tanks, piping, spill and overfill prevention equipment, installation and certification of installation that new underground storage tanks must meet.

Editor’s Note: The secretary of state has determined that the publication of this rule in its entirety would be unduly cumbersome or expensive. The entire text of the rule has been filed with the secretary of state. The entire text of the rule may be found at the headquarters of the agency and is available to any interested person at a cost established by state law. The form mentioned in this rule follows 10 CSR 20-10.022.

1. (1) In order to prevent releases due to structural failure, corrosion or spills and overfills for as long as the underground storage tank

2. (UST) system is used to store regulated substances, all owners and operators of new UST systems must meet the following requirements:

   1. (A) Tanks. Each tank must be properly designed and constructed, and any portion underground that routinely contains product must be protected from corrosion, in accordance with a code of practice developed by a nationally-recognized association or independent testing laboratory as follows:

      1. 1. The tank is constructed of fiber-

glass-reinforced plastic and complies with one (1) or more of the following industry codes:

1. A. Underwriters’ Laboratories Stand-

ard 1316, Standard for Glass-Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum Products; or

1. B. American Society of Testing and

Materials Standard D4021-86, Standard Specification for Glass-Fiber-Reinforced Polyester Underground Petroleum Storage Tanks; or

1. 2. The tank is constructed of steel and

cathodically protected in the following manner:

1. A. The tank is coated with a suitable

dielectric material;

1. B. Field-installed cathodic protection

systems are designed by a corrosion expert;

1. C. Impressed current systems are

designed to allow determination of current operating status as required in 10 CSR 20-10.031(1)(C);

1. D. Cathodic protection systems are

operated and maintained in accordance with 10 CSR 20-10.031 or according to guidelines established by the department; and

1. E. The following codes and standards

may be used to comply with paragraph (1)(A)2. of this rule:

1. (I) Steel Tank Institute Specifica-

tion for STI-P3 System of External Corrosion Protection of Underground Steel Storage Tanks:

1. (II) Underwriters’ Laboratories

Standard 1746, Corrosion Protection Systems for Underground Storage Tanks;

1. (III) National Association of

Corrosion Engineers Standard RP-02-85, Control of External Corrosion on Metallic Buried, Partially Buried or Submerged Liquid Storage Systems;

1. (IV) Underwriters’ Laboratories

Standard 58, Standard for Steel Underground Tanks for Flammable and Combustible Liquids;

1. 3. The tank is constructed of a steel,

fiberglass-reinforced plastic composite that complies with one (1) of the following industry codes:

1. A. Underwriters’ Laboratories Stan-

dard 1746, Corrosion Protection Systems for Underground Storage Tanks; or

1. B. The Association for Composite

Tanks ACT-100, Specification for the Fabrication of FRP Clad Underground Storage Tanks;

1. 4. The tank is constructed of metal with-

out additional corrosion protection measures provided that—

1. A. The tank is installed at a site that

is determined by a corrosion expert not to be corrosive enough to cause it to have a release due to corrosion during its operating life; and

1. B. Owners and operators maintain

records that demonstrate compliance with the requirements of subparagraph (1)(B)4.A. of this rule for the remaining life of the tank; or

1. 5. The tank construction and corrosion

protection are determined by the department to be designed to prevent the release or threatened release of any stored regulated substance in a manner that is no less protective of human health and the environment than paragraphs (1)(A)1.—4. of this rule;

1. (B) Piping. The piping that routinely contains regulated substances and is in contact with the ground must be properly designed, constructed and protected from corrosion in accordance with a code of practice developed by a nationally recognized association or independent testing laboratory as follows:

   1. 1. The piping is constructed of fiber-

glass-reinforced plastic;

1. 2. The following codes and standards

may be used to comply with paragraph (1)(B)1. of this rule:

1. A. Underwriters’ Laboratories Sub-

ject 971, UL Listed Non-Metal Pipe; and

1. B. Underwriters’ Laboratories Stan-

dard 567, Pipe Connectors for Flammable and Combustible and LP Gas; 10 CSR 20-10

1. 3. The piping is constructed of steel and

cathodically protected in the following manner:

1. A. The piping is coated with a suit-

able dielectric material;

1. B. Field-installed cathodic protection

systems are designed by a corrosion expert;

1. C. Impressed current systems are

designed to allow determination of current operating status as required in 10 CSR 20-10.031(1)(C);

1. D. Cathodic protection systems are

operated and maintained in accordance with 10 CSR 20-10.031; and

1. E. The following codes and standards

may be used to comply with paragraph (1)(B)3. of this rule:

1. (I) National Fire Protection As-

sociation Standard 30, Flammable and Combustible Liquids Code;

1. (II) American Petroleum Institute

Publication 1615, Installation of Underground Petroleum Storage Systems;

1. (III) American Petroleum Institute

Publication 1632, Cathodic Protection of Underground Petroleum Storage Tanks and Piping Systems; and

1. (IV) National Association of Cor-

rosion Engineers Standard RP-01-69, Control of External Corrosion on Submerged Metallic Piping Systems;

1. 4. The piping is constructed of metal

without additional corrosion protection measures provided that—

1. A. The piping is installed at a site that

is determined by a corrosion expert to not be corrosive enough to cause it to have a release due to corrosion during its operating life; and

1. B. Owners and operators maintain

records that demonstrate compliance with the requirements of subparagraph (1)(A)4.A. of this rule for the remaining life of the tank;

1. 5. The following codes may be used to

comply with paragraph (1)(B)4. of this rule:

1. A. National Fire Protection Associa-

tion Standard 30, Flammable and Combustible Liquids Code; and

1. B. National Association of Corrosion

Engineers Standard RP-01-69, Control of External Corrosion on Submerged Metallic Piping Systems; or

1. 6. The piping construction and corro-

sion protection are determined by the department to be designed to prevent the release or threatened release of any stored regulated substance in a manner that is no less protective of human health and the environment than the requirements in paragraphs (1)(B)1.–5. of this rule;

1. (C) Spill and Overfill Prevention Equipment.

   1. 1. Except as provided in paragraph

(1)(C)2. of this rule, to prevent spilling and overfilling associated with product transfer to the UST system, owners and operators must use the following spill and overfill prevention equipment:

1. A. Spill prevention equipment that

will prevent release of product to the environment when the transfer hose is detached from the fill pipe (for example, a spill catchment basin); and

1. B. Overfill prevention equipment that

will—

1. (I) Automatically shut off flow into

the tank when the tank is no more than ninety-five percent (95%) full;

1. (II) Alert the transfer operator

when the tank is no more than ninety percent (90%) full by restricting the flow into the tank or triggering a high-level alarm; or

1. (III) Restrict flow thirty (30) min-

utes prior to overfilling, alert the operator with a high level alarm one (1) minute before overfilling or automatically shut off flow into the tank so that none of the fittings located on top of the tank are exposed to product due to overfilling.

1. 2. Owners and operators are not

required to use the spill and overfill prevention equipment specified in paragraph (1)(C)1. of this rule if—

1. A. Alternative equipment is used that

is determined by the department to be no less protective of human health and the environment than the equipment specified in subparagraph (1)(C)1.A. or B. of this rule; or

1. B. The UST system is filled by trans-

fers of no more than twenty-five (25) gallons at one time;

1. (D) Installation. All tanks and piping must be properly installed in accordance with a code of practice developed by a nationally recognized association or independent testing laboratory and in accordance with the manufacturer’s instructions. Tank and piping system installation practices and procedures described in the following codes may be used to comply with the requirements of subsection (1)(D) of this rule:

   1. 1. American Petroleum Institute Publi-

cation 1615, Installation of Underground Petroleum Storage System; or

1. 2. Petroleum Equipment Institute

Publication RP100, Recommended Practices for Installation of Underground Liquid Storage Systems; and

1. (E) Certification of Installation. All owners and operators must ensure that one (1) or more of the following methods of certification, testing or inspection is used to demonstrate compliance with subsection (1)(D) of this rule by providing a certification of compliance on the UST notification form in accordance with 10 CSR 20-10.022:

   1. 1. The installer has been certified by the

tank and piping manufacturers;

1. 2. The installer has been certified or

licensed by the department;

1. 3. The installation has been inspected

and certified by a registered professional engineer with education and experience in UST system installation;

1. 4. The installation has been inspected

and approved by the department;

1. 5. All work listed in the manufacturer’s

installation checklists has been completed; or

1. 6. The owner and operator have com-

plied with another method for ensuring compliance with subsection (1)(D) of this rule that is determined by the department to be no less protective of human health and the environment.

AUTHORITY: sections 319.105, RSMo Supp. 1989 and 644.041, RSMo 1986.* Original rule filed April 2, 1990, effective Sept. 28, 1990. *Original authority: 319.105, RSMo 1989 and 644.041, RSMo 1972, amended 1973.