Inspection Flow Chart - W API653

 

Categorization Logic Chart for Aboveground Storage Tank Inspection & Integrity Test Standards API653

Yes Height > 50 feet or diameter > 30 feet?

Yes Continuous release detection employed?

No Field-erected, any capacity; or unknown construction & capacity >50,000 gal

SP001 Appendix B Category 1

Yes Spill control?

No

No

SP001 Appendix B Category 2

SP001 Appendix B Category 3

Construction type & capacity

Yes

SP001 Category 1

Continuous release detection employed?

Shop-fabricated, any capacity; or unknown construction & capacity < 50,000 gal

Yes Spill control?

No

No

SP001 Category 2

SP001 Category 3

Notes: API653 refers to American Petroleum Institute (API) Standard 653: Tank Inspection, Repair, Alteration and Reconstruction (Third Edition, December 2001) SP001 refers to Steel Tank Institute (STI) SP001: Standard for Inspection of Aboveground Storage Tanks (Fourth Edition, July 2006)

 

Resolve Environmental Engineering, Inc.

STI SP001 Tank Inspection & Integrity Test Types & Frequencies All tanks require monthly visual inspections conducted in accordance with STI SP001 (4th Ed.), Section 6.0. In addition, tanks require the following periodic tests and/or inspections: Formal external inspection (SP001 Section 7)

Formal internal inspection (SP001 Section 8)

Leak test (SP001 Section 9)

Not required

Not required

Not required

Not required

Not required

Not required

Every 20 years

Not required

Not required

Every 20 years

Not required

Not required

Every 5 years

Every 10 years

Not required

Not required

Not required

Not required

Every 10 years

Not required

Every 10 years

Every 10 years

Every 20 years

Not required

Every 5 years

Not required

Every 10 years

Shop-fabricated; 0 - 1,100 gal Shop-fabricated; 1,101 - 5,000 SP001 Category 1

Shop-fabricated; 5,001 - 30,000 Shop-fabricated; 30,001 - 50,000

Field-erected

Shop-fabricated; 0 - 1,100 Shop-fabricated; 1,101 - 5,000 SP001 Category 2 Shop-fabricated; 5,001 - 30,000

Shop-fabricated;

or