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Storage tank management.

This article, the last in our series on storage tank management, looks at an environmental compliance audit of an industrial facility

The results of an environmental audit of the underground storage and aboveground tanks at an industrial facility are presented here. The concerns relating to the physical tank details, maintenance and operational aspects are presented and recommendations are provided for corrective action. The audit was conducted using the provisions of the Ontario Gasoline Handling Code and other applicable codes.

Facility Description

The facility is an industrial operation with a storage facility for dispensing fuel to company vehicles [ILLUSTRATION FOR FIGURE 1 OMITTED]. On-site maintenance of company vehicles is an on-going operation at this facility. A gas-fired boiler supplies steam for use at the facility and the back-up fuel is No. 2 fuel oil.

The facility is registered with the Ministry of Consumer and Commercial Relations (MCCR) as a private outlet under the Gasoline Handling Amendment Act of 1988.



Storage Tank Inventory

The inventory of Underground Storage Tanks (USTs) and Aboveground Storage Tanks (ASTs) is presented in Tables 1 and 2, respectively. The information, tank identification, location, contents, and status were verified on site. Underground storage systems are used for gasoline, diesel, No. 2 fuel oil and transmission oil. An abandoned UST exists on the site and was used previously for gasoline service. [TABULAR DATA FOR TABLE 3 OMITTED] [TABULAR DATA FOR TABLE 4 OMITTED] Engine oil, waste oil and glycol are stored in ASTs. Diking exists only for the waste oil and engine oil (ASTs).

Audit Areas and Results

The audit covered the following areas for USTs: status and age of the tanks; design and installation of these tanks; upgrades of existing USTs such as: upgrade tanks (removing, replacing or restoring tanks and piping), leak detection, spill containment, and overfill protection devices; tank and line tightness testing; fill pipes; inventory control; corrosion protection; product transferring operations; filling operations; and leak detector monitoring.

The following areas were checked for ASTs: certification of tanks, installation, inspection and maintenance, corrosion protection, vehicular impact protection, and tank venting; dike features; product identification; and product transfer.

The results of the audit are presented in Table 3 and Table 4 for USTs and ASTs, respectively. The compliance issue, environmental concerns, code violation and corrective actions are provided in these tables. Management can use the results of audit studies and develop a management plan to bring their operations into compliance. Planning the schedule and developing the budget are required to implement the recommended corrective actions.


1. Alberta Environment, 1993. Petroleum Storage Tank Closures. MUST Project Alberta Environment, Room 1443, Standard Life Centre, 10405 Jasper Avenue, Edmonton, AB, T5J 3N4.

2. API 653. Tank Inspection, Repair, Alteration and Reconstruction.

3. Canadian Council of Ministers of the Environment, 1993. Environmental Code of Practice for Underground Storage Tanks Systems Containing Petroleum Products and Allied Petroleum Products (1993).

4. Canadian Council of Ministers of the Environment, 1994. Environmental Code of Practice for Aboveground Storage Systems Containing Petroleum Products.

5. Canadian Council of Ministers of the Environment, 1991. Environmental Code of Practice for Vapour Recovery in Gasoline Distribution.

6. Canadian Environmental Protection Act (CEPA) [section] 54(1) - Regulations Respecting the Registration of Storage Tanks Systems Containing Petroleum Products and Allied Petroleum Products (Draft 7.18.IR 1995).

7. Environment Canada, February 1989. Detection, Prevention and Remediation of Leaks from Underground Storage Tanks. Report EPS2/PN/1.

8. Environment Canada, 1994. Guidelines and Regulations Applicable to Underground and Aboveground Storage Tanks Containing Petroleum Products. Version 1994.2, Emergencies Section, Environment Canada, 224 West Esplanade, North Vancouver, BC, V7M 3H7.

9. Geyer, W. (July 1992). 'Bringing Storage Tanks to the Surface', Chem. Eng., 94-102.

10. Longland, M.J. and Puntis, R. (June/July 1995), 'Underground Storage Tank Systems. Upgrade Requirements', Haz. Mat. Management, 41-43.

11. Meyers, P. (April 1992). 'Keeping Aboveground Storage Tanks in Top Shape', Chem. Eng., 161-164.

12. National Fire Code of Canada 1990 (revised 1993).

13. OME Guideline for Environmental Protection Measures at Chemical Storage Facilities.

14. Petrie, D.P. and Spiegel, B.N., Pollution Liability for Flammable Liquid Storage Tanks. A Willms & Shier Report for Canadian Environmental Regulation and Compliance News (dated 8/8/94).

15. Revised Statutes of Ontario, 1990. Fuel Oil Code, RRO 529/90, O. Reg. 679/91; 217/92; 538/92;542/92.

16. Revised Statutes of Ontario, 1990. Gasoline Handling Act, RSO 1990, Chapter G.4 and O. Reg. 521/93.

17. Rorty, M. and McLearn, M.E. (December 1993). 'Test, Monitor and Maintain Aboveground Tanks Properly', Chem. Eng. Prog., 45-50.

18. US EPA (July 1990). Musts for USTs. A Summary of Regulations for Underground Storage Systems.

William P. Crocker, MASc, P. Eng. is with BOVAR Environmental in Toronto, ON. Henry Miyamoto, MCIC, MASc, P. Eng. is based in Toronto, ON. This paper was originally presented at the Seminar on Storage and Handling of Hazardous Materials, November 28-30, 1995,for the University of Toronto, Faculty of Applied Science and Engineering, Continuing Engineering Education Department and EPIC, the Educational Program Innovations Centre.
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Title Annotation:part 3
Author:Crocker, William P.; Eng, P.; Miyamoto, Henry K.
Publication:Canadian Chemical News
Date:Nov 1, 1996
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