§ 6-2-67. REPAIRS TO CERTAIN STORAGE FACILITIES.

(A)

This section applies to an underground storage tank containing motor vehicle fuel not under pressure.

(B)

Except as provided in Subsection (C), a permittee may interior-coat a tank to prevent leaks in accordance with Subsections (E) and (F).

(C)

If a tank has leaked or released its contents accidentally, a permittee may interior-coat the tank one time if the requirements of Subsections (D) through (G) are met.

(D)

The permittee shall determine the thickness and condition of the storage tank by providing for the tank to be tested as prescribed by this subsection. If the test results indicate that the tank has a serious corrosion problem, the director may require additional corrosion protection for the tank or may prohibit the permittee from making the repair.

(1)

The permittee may conduct an ultrasonic test.

(2)

The permittee may provide for a special inspector to enter and inspect the entire interior surface of the tank and certify that the shell provides structural support for interior lining.

(a)

This subparagraph applies to a fiberglass tank.

(i)

Before inspection, the permittee shall clean the tank of all wall surface residue.

(ii)

The inspector shall measure the interior diameter. The inspector shall identify each area, if any, where compression or tension cracking is occurring.

(iii)

The inspector shall provide the director with the test results, including the required certification, if any.

1.

The permittee may not reline a tank or return it to service if the measured diameter is less than 99 percent of the original diameter.

2.

The permittee shall reinforce each cracked area, if any, with additional glass fiber before lining the tank.

(b)

This subparagraph applies to a steel tank.

(i)

Before inspection, the permittee shall abrasive-blast the interior surface completely free of scale, rust, and foreign matter in accordance with the American Petroleum Institute's recommended practice relating to white metal blasting.

(ii)

The inspector shall sound each perforation or pitted area, if any, with a brass ball peen hammer to enlarge the perforation or break through a potentially thin steel area.

(iii)

The inspector shall provide the director with the test results, including the required certification, if any.

(iv)

The permittee may not line a tank or return it to service if:

1.

the tank has an open seam or split larger than three inches;

2.

the tank has a perforation larger than one and one-half inches in diameter, or a perforation under the gauging opening larger than two and one-half inches in diameter; or

3.

in a one square-foot area, the tank:

a.

has more than five perforations smaller than one-half inch in diameter; or

b.

has one or more of the perforations larger than one-half inch in diameter;

4.

in a 500 square-foot area, the tank:

a.

has more than 20 perforations; or

b.

has one or more of the perforations larger than one-half inch in diameter.

(3)

The director may approve another similar test method.

(E)

A permittee shall use an interior-coating material that is compatible with motor vehicle fuel and that is approved by the director.

(F)

A permittee shall apply interior-coating material in accordance with nationally recognized engineering practices, including the American Petroleum Institute's recommendation for the interior lining of an existing underground storage tank.

(G)

Before a permittee may place a tank back into service after the repair of a leak, the permitted shall provide for testing the tank in the operating condition by using a precision test. The permittee may not perform the test.

Source: 1992 Code Section 14-3-104(D); Ord. 031023-10; Ord. 031211-11.