Minnesota Administrative Rules

7151.8400 CONTAMINATION DETERMINATION.

Subpart 1.

Application.

Except as otherwise provided in subpart 2, owners and operators shall sample for contamination when removing a tank and determine, through laboratory analysis, the extent of contamination. In selecting sample types, sample locations, and measurement methods, owners and operators shall consider:

A.

the method of closure;

B.

the nature of the stored substance;

C.

the type of secondary containment;

D.

the depth to groundwater;

E.

areas having the greatest potential for contamination; and

F.

other factors necessary for identifying the presence of a release.

Subp. 2.

Exclusions.

The following aboveground storage tank systems are excluded from the requirements of this part:

A.

a tank storing other regulated substances;

B.

a tank, which has been removed, that exclusively contained number 6 grade fuel oil or asphalt cement; and

C.

a tank with containment under the tank floor meeting part 7151.5400, subpart 3, item C, D, E, G, H, or I where:

(1)

there is no evidence of a release through visual evidence, odor, operating history; and

(2)

there is no compromise of the integrity of the containment.

Statutory Authority:

MS s 115.03

History:

23 SR 883; 25 SR 556

Published Electronically:

October 2, 2007