Minnesota Administrative Rules

7151.7400 RECORDS.

Subpart 1.

Application.

Owners and operators of tanks shall retain information, reports, and records according to this part. Upon agency request, tank owners and operators shall make such data available to the agency for viewing and copying.

Subp. 2.

Tank system design.

A.

Except as specified in item C, the owner and operator shall retain, for the life of the tank system, the following records which are available as of November 2, 1998:

(1)

maintenance and repair documentation;

(2)

third-party certifications of tank system equipment; and

(3)

as-built drawings.

B.

As-built drawings must be maintained by the owner or operator of all field-erected tank installations conducted after November 2, 1998. The drawings shall be certified by a professional engineer and illustrate:

(1)

the tank foundation;

(2)

the tank bottom design; and

(3)

the volume and design of the secondary containment basin, including the dike walls and the area directly under the tank.

C.

Owners and operators shall retain for three years all documentation addressing service check and equipment calibrations.

Subp. 3.

Containment area evaluation.

Owners and operators of tanks shall retain, for the life of the tank system, the following written records of all sampling and testing methods used to evaluate permeability of soil containment areas:

A.

classification of soils used in containment area construction;

B.

soil descriptions and logs of each sample location;

C.

a table of individual permeability tests; and

D.

hydraulic conductivity of the soil expressed as centimeters per second for each sample location and for each containment area.

Subp. 4.

Monitoring.

A.

Owners and operators of tanks shall retain, for at least three years from the date of the activity, the written records of all periodic monitoring activities. The person performing the monitoring activity shall document the following information:

(1)

the name of the person doing the monitoring;

(2)

the monitoring method or methods used;

(3)

the date of the monitoring; and

(4)

the results of the monitoring.

B.

Owners and operators shall retain, for the life of the tank, documentation of corrosion protection and internal tank inspections and a written summary of the results.

C.

Owners and operators shall retain, for three years after the tank has been taken out of service, records demonstrating compliance with out-of-service tank requirements under parts 7151.8100 to 7151.8500. Records must be retained in one of the following ways:

(1)

by the owners and operators who took the aboveground storage tank system out of service;

(2)

by the current owners and operators of the site; or

(3)

by mailing the records to the agency if they cannot be retained at the closed facility.

D.

Upon agency request, owners and operators of tanks shall make data available to the agency for viewing and copying.

Subp. 5.

Tank inspection.

Owners and operators of tanks shall retain, for the life of the tank system, the written records of all internal and external tank inspections.

Statutory Authority:

MS s 115.03

History:

23 SR 883

Published Electronically:

October 2, 2007