Md. Code Regs. 26.10.17.06

Current through Register Vol. 51, No. 22, November 1, 2024

Section 26.10.17.06 - Performance Standards for Piping

An owner, an operator, and a person in charge of an AST system with a shop-fabricated AST shall:

A. If installing or relocating a shop-fabricated AST on or after June 13, 2022, install piping that does not penetrate a secondary containment dike, unless otherwise approved by the Department;

B. Ensure an existing shop-fabricated AST meets the following requirements:

(1) For piping connected to an AST penetrating a secondary containment dike:

(a) Obtain approval from the Department to leave the piping in place; or

(b) Properly abandon and replace the piping not later than 1 year after June 13, 2022 with piping that does not penetrate the secondary containment dike; and

(2) For underground piping connected to an AST, ensure the piping complies with the underground piping requirements in §E of this regulation not later than 1 year after June 13, 2022;

C. Ensure an aboveground piping system connected to a shop-fabricated AST is:

(1) Constructed of carbon steel, alloy steel, or stainless steel piping;

(2) Compatible with the type of oil transferred in the piping;

(3) Designed and constructed in accordance with recognized industry standards;

(4) Liquid tight;

(5) Properly supported by permanent bracing to prevent structural weaknesses; and

(6) Protected against physical damage;

D. Ensure a piping system installed aboveground or inside of a building is not constructed with:

(1) Low melting point materials, such as aluminum, copper, or brass;

(2) Materials that soften on fire exposure, such as plastics; or

(3) Non-ductile materials, such as cast iron;

E. If installing an underground piping system, comply with the following requirements:

(1) Install the piping system, including containment sumps, in accordance with the performance standards in COMAR 26.10.03.02 and .03A (3);

(2) Installation of the piping system is performed in the continuous on-site presence and under the direction of a certified UST system technician, as required under COMAR 26.10.02.03D;

(3) Test the piping system for tightness in accordance with COMAR 26.10.03.05 and 26.10.05.02D;

(4) Test the containment sumps for tightness in accordance with COMAR 26.10.03.03A(3);

(5) Provide a method of leak detection in accordance with COMAR 26.10.05.02D;

(6) Maintain the containment sumps clean and free of liquid; and

(7) If a test for tightness conducted in accordance with §E(3) or (4) of this regulation results in a failed test result or a leak is found:

(a) Report the failed test result to the Department within 2 hours in accordance with COMAR 26.10.08.01; and

(b) Follow the investigation and confirmation procedures in COMAR 26.10.08.03, including making repairs and retesting the piping system and containment sumps for tightness.

Md. Code Regs. 26.10.17.06

Regulation .06 adopted effective 49:12 Md. R. 642, eff. 6/13/2022