Section 93.440. Aboveground tank inspection.

 

(1)   Delayed effective date for existing tanks. The requirements in this section shall become effective for existing tanks within 1 year after February 1, 2009.

(2)   Inspection of field-erected metallic aboveground storage tanks.

(a) Metallic aboveground storage tanks within the scope of API 653 shall be inspected in accordance with the requirements of API 653.

(b) Initial inspections shall be conducted as required in Table 93.440.

(c)

1. The agency conducting an API 653 inspection shall report all applicable information from the inspection on an API 653 tank inspection summary form supplied by the department.

2. A copy of the API 653 tank inspection summary shall be provided to the tank owner or operator along with the complete API 653 inspection report.

(d) The tank owner or operator shall have the API 653 inspection summary on site and available for inspection within 30 days after receiving it from the agency that performed the inspection.

(e) For tanks undergoing a transition from storing an unregulated substance to storing a regulated substance, any inspection in Table 93.440 that has not occurred shall be performed before putting the regulated substance into the tank. For the purposes of this paragraph, the service date is the date the tank was initially placed into service after construction.

(3)   Inspection of shop-built metallic aboveground storage tanks.

(a)

1. The owner or operator of all shop-built metallic aboveground fixed storage tanks shall have the tanks inspected in accordance with STI SP001, except as provided in subd. 2.

2.

a. An alternate inspection procedure that provides equivalent environmental and fire safety protection may be used if accepted in writing by the department, or if developed by the certifying engineer for a facility in accordance with the federal spill prevention control and countermeasure regulations in 40 CFR 112 .

b. This paragraph does not apply to tanks that have a capacity of less than 1,100 gallons.

c. This paragraph does not apply to heating oil tanks or to tanks at farms and construction projects.

(b)

1. The inspection schedule required in par. (a) shall be implemented as stated, for tanks put into service on or after February 1, 2009.

2. The inspection schedule required in par. (a) shall be implemented within 4 years after February 1, 2009, for tanks put into service before February 1, 2009.

3. The inspection schedule required in par. (a) shall be based on the tank's time in service.

4. Monthly inspections may be omitted for seasonal-use tanks during periods when the tank does not contain a regulated substance.

(c) If product is found within a tank's interstitial space during an inspection under this subsection, delivery of product into the tank shall be immediately suspended, and either of the following actions shall be taken within 10 business days:

1. A vacuum or pressure test shall be performed in accordance with the manufacturer's recommendations.

2. The tank shall be closed in accordance with s. ATCP 93.460 .

(4)   Inspection of non-metallic aboveground storage tanks.

(a) The owner or operator of all non-metallic aboveground storage tanks — including concrete, tile-lined, fiber-reinforced plastic, and homogeneous plastic tanks — that have a capacity of 1,100 gallons or more shall have the tanks inspected in accordance with all of the following:

1. `Monthly inspection.'

a. At least monthly there shall be a visual inspection of the tank exterior, pipe connections and secondary containment, for signs of leakage, physical damage, and environmentally induced degradation.

b. Any product or water present in the secondary containment shall be removed.

2. `Annual inspection.'

a. At least annually there shall be a visual inspection of tank supports and foundation for signs of physical damage and chemical or environmentally induced degradation.

b. At least annually there shall be a test of the functionality of the tank venting system, if so equipped.

3. `Qualifications for inspection.' The monthly and annual inspections shall be done by owners, contractors or operations personnel, who are knowledgeable of the facility operations, the tank construction and operation, and the characteristics of the product stored.

4. `Every 5 years.' At least every 5 years there shall be an external and internal examination of tank and pipe connections for physical or chemical damage or environmentally induced degradation, conducted by personnel trained and experienced in examining the specific tank construction type.

(b) Inspection records shall be maintained at the site and available for review by the authorized agent or the department upon request.

(5)   Corrective action.

(a) If a suspected or obvious release is encountered during the inspections under this section, a tank-system site assessment shall be conducted in accordance with s. ATCP 93.465 before the tank is returned to service.

(b) All corrective actions, including repairs, that are indicated by the inspections under this section shall be completed before the tank system is returned to service.

(6)   Submittal of inspection records.

(a) For all tanks within a new or existing dike system that has walls or floor made of earth or masonry, all inspections required by API 653 or STI SP001 section 1.6 shall be documented as required or recommended by those standards. Each of these inspection records shall be submitted to the department no later than 1 month after the inspection, except as specified in par. (b) .

(b) For all tanks within an existing dike system that has walls or floor made of earth or masonry, a record of the most recent inspection shall be submitted to the department no later than 6 months after February 1, 2009, and records of subsequent inspections shall be submitted to the department no later than 1 month after each inspection.

CR 07-029 : cr. Register November 2008 No. 635 , eff. 2-1-09; correction in (2) (b), (e), (3) (c) 2., (5) (a) made under s. 13.92 (4) (b) 7. , Stats., Register December 2011 No. 672 ; corrections in (2) (b), (e), (3) (c) 2., (5) made under s. 13.92 (4) (b) 7. , Stats., Register October 2013 No. 694 .

Note

Form ERS-10737-API 653 Tank Inspection Summary is available from the Bureau of Weights and Measures, PO Box 8911, Madison, WI 53708-8911, or at telephone [phone], or from the Bureau's Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanks.aspx . Microsoft Windows NT 6.1.7601 Service Pack 1 Table 93.440
Inspection Type and Schedule - See PDF for table Microsoft Windows NT 6.1.7601 Service Pack 1 STI SP001 requires monthly and annual inspections, and requires maintaining records of these inspections. For almost all ASTs that have a capacity of 5000 gallons or less, these inspections are only required to be visual. For most tanks that have a capacity of more than 5,000 gallons, the requirements include, but are not limited to, having a certified inspection every 20 years, consisting of a visual exam and spot, ultrasonic examination, with no requirement for an integrity pressure test. STI SP001 includes optional checklists that may be used for the required record keeping. These checklists and a compendium that contains further guidance for these inspections are available from the Bureau of Weights and Measures, PO Box 8911, Madison, WI 53708-8911, or at telephone [phone], or at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanks.aspx . Microsoft Windows NT 6.1.7601 Service Pack 1 Tanks that are not required by this paragraph to have periodic inspections may otherwise be required to have periodic inspections, by the federal Spill Prevention Control and Countermeasure regulations in 40 CFR 112 . Microsoft Windows NT 6.1.7601 Service Pack 1 Heating oil tanks and tanks at farms and construction projects are subject to the requirements in NFPA 31 or 30A, under sections ATCP 93.310 and 93.630 , respectively. Microsoft Windows NT 6.1.7601 Service Pack 1 See subsection (5) for further requirements for corrective action. Microsoft Windows NT 6.1.7601 Service Pack 1