An underground tank must, to be installed,

1. have a double wall and a capacity of more than 110,000 litres;

2. have, in its interstitial space, an automatic leak detection system with a visual and audible alarm manufactured under the requirements of CAN/ULCS675.1, Standard for Volumetric Leak Detection Devices for Underground and Aboveground Storage Tanks for Flammable and Combustible Liquids or CAN/ ULCS675.2, Standard for Nonvolumetric Precision Leak Detection Devices for Underground and Aboveground Storage Tanks and Piping for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada;
   

3. contain, in its interstitial space, where applicable, brine composed exclusively of calcium chloride with or without potassium chloride or sodium chloride where the respective concentration does not exceed 42%, 3% and 2%; and
   

4. have any damage repaired, before the tank is backfilled, according to the manufacturer’s specifications.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 23.
   

An underground tank must be installed

1. at least 1 m from the foundations of any building;

2. at least 1 m from any other tank;

3. at least 1 m from the property line;

4. at least 750 mm from the inner wall of the excavation; and

5. in such manner that the loads carried by the foundations or the supports of a building cannot be transmitted to the tank; in addition, the soil must not be removed from the footing down to the bed of the excavation, in a 45 ° slope.
   

   O.C. 220-2007, s. 1.
   

An underground tank likely to be subjected to overhead vehicular traffic must be sited

1. at a depth not less than 1 m below ground level, be covered with not less than 900 mm of a backfill material referred to in section 8.33 and be covered with not less than 100 mm of bituminous concrete; or
   

2. at a depth of not less than 450 mm, be covered with at least 300 mm of a backfill material referred to in section 8.33 and be covered with a reinforced concrete slab not less than 150 mm thick; the slab must also extend at least 300 mm horizontally beyond the perimeter of the tank.
   

   O.C. 220-2007, s. 1.
   

An underground tank not to be subjected to overhead vehicular traffic must be sited

1. at a depth of not less than 600 mm below ground level and be covered with a backfill material referred to in section 8.33; or
   

2. at a depth of not less than 400 mm, be covered with a backfill material referred to in section 8.33 and be covered with a reinforced concrete slab at least 100 mm thick.
   

   O.C. 220-2007, s. 1.
   

An underground tank must be installed on a backfill foundation at least 300 mm thick, that exceeds the tank’s perimeter by at least 300 mm and is composed of one of the following materials:

1. in the case of a fibreglass tank, pea gravel, rounded pea gravel between 3 and 20 mm or crushed stone at least 3 mm and not more than 13 mm; in addition, each material used must be clean and without dust, sand, debris, organic material, ice or snow so that not more than 3% of its weight passes through a 2.5 mm sieve;

2. in the case of a steel tank, clean or natural sand free of stones compacted to at least 90% of the optimal density of the modified proctor determined according to CAN/BNQ Standard 2501-255, Soils - Determination of the Water Content-Dry Density Relation - Modified Effort Compaction Test (2,700 kN.m/ m3), published by the Bureau de normalisation du Québec, and be without stone, debris, organic material, ice or snow; or

3. in the case of a jacketed steel underground tank, clean or natural sand free of stones compacted to at least 90% of the optimal density of the modified proctor determined according to CAN/BNQ Standard 2501-255, Soils - Determination of the Water Content-Dry Density Relation - Modified Effort Compaction Test (2,700 kN.m/m3), published by the Bureau de normalisation du Québec, and be without stone, debris, organic material, ice or snow, or pea gravel or rounded pea gravel between 3 and 20 mm.
   

   The tank must be backfilled, as applicable, with the materials described in subparagraphs 1 to 3 of the first paragraph and be covered with a finishing grade layer not more than 300 mm thick.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 24.
   

An underground tank must be lowered into an excavation by the use of lifting lugs and hooks designed for that purpose or spreader bars, if required by the manufacturer’s instructions; the use of chains or slings around the tank is prohibited.

O.C. 220-2007, s. 1.

After an underground tank has been set in the excavation, it must undergo the leak tests listed below that are to be conducted in compliance with the following requirements:

1. for the inner wall of a tank,

   1. all the tank’s caps must be removed and steel caps must be installed, after a joint compound or tape has been applied that meets the requirements of section 8.69;
      

   2. a safety valve set to a pressure of not more than 40 kPa capable of discharging the flow from the pressure source must be installed on a tank opening and its operation inspected before each test;
      

   3. the pressure inside the tank and in its interstitial space must be measured simultaneously using a pressure gauge calibrated in units of not more than 1 kPa;

   4. a pressure of at least 30 kPa and not more than 35 kPa must be created inside the tank; and

   5. the pressure in the interstitial space must remain stable;

2. for the outer wall of a tank,

   1. the pressure inside the tank and in its interstitial space must be measured simultaneously using a pressure gauge calibrated in units of not more than 1 kPa;
      

   2. the pressure source must come from the inside part of the tank and be transferred into the interstitial space until it reaches a pressure of at least 30 kPa and not more than 35 kPa; a tank manufactured under CAN/ ULC Standard S603.1, External Corrosion Protection Systems for Steel Underground Tanks for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada, may be pressurized according to the manufacturer’s instructions;

   3. it must be tested using leak detection fluid; and

   4. the interstitial space of a fibreglass tank must be inspected according to the manufacturer’s recommendations.
      

      During the tests, once the temperature has been stabilized and the pressure source removed, the pressure created must be maintained for at least one hour.
      

      The pressure created in the interstitial space of the tank must be released before the pressure of the inner wall.
      

      During each test period, the necessary inspections must be made to ensure the tests are properly conducted and to prevent accidents.
      

      O.C. 220-2007, s. 1; O.C. 87-2018, s. 25.
      

In the case of a tank with compartments, each compartment must be tested separately in accordance with section 8.35, not simultaneously and only if the adjacent compartment is not under pressure.

O.C. 220-2007, s. 1.

If the tank has already contained a petroleum product or other flammable product, the leak tests required by section 8.35 must be conducted using nitrogen.

O.C. 220-2007, s. 1.

The tests required by section 8.35 need not be conducted if the contractor or owner-builder

1. ascertains that depressurization of at least 42 kPa created by the manufacturer in the interstitial space of the tank is maintained after it has been placed in the excavation; or
   

2. has conducted a vacuum test on the interstitial space at a pressure of at least 42 kPa for at least one hour, if such a test is authorized by the manufacturer.
   

   O.C. 220-2007, s. 1.
   

When leakage is detected during the leak tests, the tank must be repaired and subjected to a new test or be replaced.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not use a petroleum product to ballast a tank unless the tank has a fill pipe and a vent line and all other openings have been plugged.

O.C. 220-2007, s. 1.

If the water table is reached during excavation work to install an underground tank, the contractor or owner-builder must comply with the following requirements:

1. the up-lift stress of the tank must be calculated and a copy of the calculation must accompany the analysis documents and be sent to the owner to be filed in the petroleum equipment installation register that the owner must make available to the Board in accordance with Chapter VI of the Safety Code (chapter B-1.1,

   r. 3) made under the Building Act (chapter B-1.1);

2. the calculation must be based on the highest estimated water-level elevation;
   

3. if the calculation indicates that the up-lift stress is such that an empty tank could be displaced, the tank must be anchored by anchor straps attached to a reinforced concrete slab or to anchor weights under the tank, by ground anchors or by use of a reinforced concrete slab above the tank;
   

4. the size of the slab or anchors must be designed on the basis of the up-lift stress to which the empty tank will be submitted and in a manner to prevent it from lifting;
   

5. the tank must be separated from a concrete slab or anchor weight by a layer at least 300 mm thick of a backfill material referred to in section 8.33;
   

6. every anchor strap or ground anchor must be electrically insulated from the tank, be installed in such a manner that it does not damage the tank’s protective coating, and be tightened by hand in the case of a strap; and
   

7. the strength of the anchor straps and ground anchors must be determined on the basis of the factors mentioned in paragraph 4.
   

   O.C. 220-2007, s. 1.
   

A contractor or owner-builder may not carry out construction work on a steel underground tank unless it is protected against corrosion in accordance with one of the methods in the following standards:

1. CAN/ULC S603.1, External Corrosion Protection Systems for Steel Underground Tanks for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada; or
   

2. NACE SP0169, Control of External Corrosion on Underground or Submerged Metallic Piping Systems, or NACE SP0285, Corrosion Control of Underground Storage Tank Systems by Cathodic

   Protection, published by NACE International, if the petroleum equipment installation is protected by an induced current system.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 26.
   

Every excavation in which a tank is installed must have at least one observation well.

The observation well must consist of a perforated pipe at least 150 mm in diameter installed vertically, extending down 900 mm below the bottom of the tank, and be accessible from the ground. The pipe must also be enclosed inside a permeable lining if it is buried in sand.

O.C. 220-2007, s. 1.

A contractor or owner-builder may neither install an underground tank that has been removed from the ground, nor refurbish, repair or alter it, unless it meets the requirement of CAN/ULC-S676, Standard for Refurbishing of Storage Tanks for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 27.

If construction work consists in removing petroleum equipment from the ground, the contractor or owner-builder must, as the case may be,

1. empty all petroleum product from the tank, piping and motor fuel dispensers, before their removal;
   

2. remove the tank and piping from the ground and from the site along with the motor fuel dispenser connected to it, after purging the tank of all vapours until the flammable vapour concentration is less than 20% of the lower explosive limit; or
   

3. destroy the tank as provided by section 8.68 or have it approved as provided by section 8.44, in which case it must be purged of any vapour and its openings must be hermetically sealed other than a ventilation opening of at least 60 mm in diameter.
   

A contractor or owner-builder may not carry out alteration work to an underground tank that may be abandoned on site, unless the contractor or owner-builder has obtained the certificate of a person recognized under section 8.13, stating that

1. removing the tank would jeopardize the integrity of the building’s structure or of a part that is essential for the intended use of the building; or

2. the machinery required for the removal of the tank cannot be taken onto the site.
   

   The contractor or owner-builder must then

   1. remove all sludge from the tank so as to prevent any explosion and dispose of it in a tank or other closed container compatible with petroleum products;

   2. remove the piping from the ground;

   3. purge the tank of all vapours until the concentration is less than 10% of the lower explosive limit; and

   4. fill the tank with inert material such as sand, gravel or concrete and plug the openings.

   
   

   O.C. 220-2007, s. 1.

   Section 2. - Aboveground tanks
   

   O.C. 220-2007, s. 1.
   

An aboveground tank, a loading or unloading facility and metal piping installed on a tank must be protected against external corrosion by the use of paint, wrapping or coating.

O.C. 220-2007, s. 1.

Siting of an aboveground tank must conform to the requirements of the following Tables 2 and 3:

TABLE 2

SITING OF ABOVEGROUND TANKS

Minimum distance, in metres, measured horizontally, between any point on outside tank shell and

D: The greater distance between 3 m and one-half tank height. Tank height is measured from the bottom of the diked areas.

* Class 3 products are products with a fl ash point not above 93.3 °C.

TABLE 3

DISTANCES BETWEEN TWO ABOVEGROUND TANKS

Tank capacity Minimum free distance

Tanks where none exceeds 1 m 230,000 L

Tanks of various capacities, One-half of smallest tank

one only exceeding 230,000 L diameter, but never less than 1 m

Tanks of equal capacity, each One-half diameter of one tank exceeding 230,000 L

Tanks of various capacities, One-half diameter of smallest each exceeding 230,000 L tank

D. 220-2007, a. 1; O.C. 87-2018, s. 28.

Despite section 8.48, an aboveground tank used to store motor fuel in a motor fuel dispensing outlet situated in a designated location must be installed so that the tank and the end of the motor fuel dispensing hose are at all times at least 12 m from any building or property line.

O.C. 220-2007, s. 1.

An aboveground tank used to store and sell motor fuel that is installed in a designated location within the limits of a municipality must be protected by a fence that meets the requirements of section 8.217.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install

1. an aboveground vertical tank, unless it rests on concrete or masonry foundations or on a bed of crushed stone, gravel, sand or a combination of those materials; or
   

2. an aboveground horizontal tank, unless it sits above ground level on a support of concrete, masonry or steel coated with an anti-corrosive material.
   

   O.C. 220-2007, s. 1.
   

A steel support on which an aboveground tank is installed must have a fire-resistance rating longer than 2 hours within the meaning of Chapter I, except for a steel stand if the lowest point of the tank supported by it is not more than 300 mm above ground.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install a vertical tank directly on the ground, unless the slope allows water to flow away from the base of the tank.

O.C. 220-2007, s. 1.

In areas subject to earthquake forces, a tank used to store petroleum products, its supports and connections must be designed to resist such forces in compliance with

1. Part 4 of the Code referred to in Chapter I, as amended by Division III of that Chapter; and
   

2. Appendix A of CAN/ULC-S601, Standard for Shop Fabricated Steel Aboveground Tanks for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 29.
   

A contractor or owner-builder may not install an aboveground tank on a floodplain referred to in the Protection Policy for Lakeshores, Riverbanks, Littoral Zones and Floodplains (chapter Q-2, r. 35), unless it is anchored to prevent floating.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install an aboveground tank, unless it is protected from vehicle impact.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install an aboveground tank that has piping or a fitting connected to it at a point below the highest level to which the petroleum product it contains may rise, unless the piping or fitting has a shut-off valve that meets the requirements of one of the standards referred to in section 8.115 and is located as near as is practicable to the shell of the tank.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install an aboveground tank used to store petroleum products, unless openings for gauging tanks have a vapour tight and lockable cover.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install an aboveground tank with a heating appliance, except if it has thermometers and thermostats so that the temperature of the product it contains is maintained at least 10 °C below the product’s flash point.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install an aboveground tank used to store petroleum products, unless it has a dike to form a diked area around the aboveground tank or tank farm holding 5,000 litres or more.

To that end, the diked area that protects

1. one tank only must have a capacity sufficient to contain a volume of liquid at least 10% greater than the volume of the tank;
   

2. several tanks must have a capacity sufficient to contain a volume of liquid at least equal to the volume of the greater of

   1. the capacity of the largest tank plus 10% of the aggregate capacity of all the other tanks; and

   2. the capacity of the largest tank plus 10%.
      

      In calculating the capacity of the diked area, the volume of the part of the tanks situated below the top of the dike must be included.
      

      O.C. 220-2007, s. 1.
      

The dike referred to in section 8.60 is not required for

1. a tank with a capacity of 50,000 litres or less that meets the following requirements:

   1. it has an overfill protection device that meets the requirements of CAN/ULC-S661, Standard for Overfill Protection Devices for Flammable and Combustible Liquid Storage Tanks, published by Underwriters’ Laboratories of Canada, and a containment device with a capacity of at least 15 litres that meets the requirements of CAN/ ULC-S663, Standard for Spill Containment Devices for Flammable and Combustible Liquid Aboveground Storage Tank, published by Underwriters’ Laboratories of Canada;
      

   2. it meets one of the standards referred to in paragraphs 2 to 4 of section 8.24 or, in the case of a double-walled tank, the standard referred to in paragraph 1 of that section;
      

2. a tank used to store Type No. 4, No. 5 or No. 6 heating fuel oil if it has a system capable, in the event of leakage, of containing or directing the product to a safe location.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 30.
   

A contractor or owner-builder may not construct a dike around an aboveground tank, unless it meets the following requirements:

1. the dike must be of earthwork, steel, concrete or bonded masonry, be liquid-tight and be capable of withstanding a full hydrostatic head;

2. the slope of the walls of the dike must be consistent with the angle of repose of the material used;

3. the dike must not be higher than 1.8 m from the bottom of the diked area;

4. the minimum distance between the dike centre line and the outer tank shell must meet the requirements of Table 2 of section 8.48; and
   

5. the inner wall and the bottom of a diked area must be impermeable to petroleum products and, to that end, the impermeability must be ensured by
   

   1. a liner protected against loads and fire complying with CAN/ULC-S668, Standard for Liners Used for Secondary Containment of Aboveground Flammable and Combustible Liquid Tanks, published by Underwriters’ Laboratories of Canada;

   2. a compacted layer of homogeneous soil at least 3 m thick where the water permeability coefficient of the soil is equal to or less than 10-6 cm/s; and

   3. a construction consisting of concrete or other incombustible material, provided that the diked area is approved by an engineer who is a member of the Ordre des ingénieurs du Québec.
      

      O.C. 220-2007, s. 1; O.C. 87-2018, s. 31.
      

In the case of subparagraph b of paragraph 5 of section 8.62, the contractor or owner-builder must obtain a laboratory report attesting to the required permeability and thickness of the soil. A copy of the report must be sent to the owner of the tank to be filed in the register referred to in paragraph 1 of section 8.41.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install a tank used to store a Class 1 petroleum product, except if access to the roof of the tank and to the shut-off valve controls is situated higher than the height of the dike if

1. the height of the dike exceeds 3.5 m; or

2. the distance between the tank and the top inside edge of the dike wall is lower than the height of the dike.
   

   O.C. 220-2007, s. 1.
   

A contractor or owner-builder may not construct a diked area for an aboveground tank, unless

1. the diked area has a drainage system such as a sump or a channel located at its lowest point and has a closed valve to drain the water;

2. the control for the drainage system valve is accessible at all times;

3. the bottom of the diked area has a uniform slope of at least 1% between any tank and the lowest point; and
   

4. the diked area complies with section 22.11.2.6 of NFPA Standard 30 Flammable and Combustible Liquids Code, published by the National Fire Protection Association, if it contains more than 1 tank.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 32.
   

If construction work consists in removing aboveground petroleum equipment, the contractor or owner-builder must

1. drain petroleum products from tanks, piping, motor fuel dispensers and loading and unloading equipment before they are removed; and
   

2. remove all tanks, piping, motor fuel dispensers, loading and unloading equipment and any leakage and spillage protection work from the site.
   

   O.C. 220-2007, s. 1.
   

A contractor or owner-builder may not install an aboveground tank or aboveground piping that has already been used, unless the following requirements are met:

1. the tank must be approved in accordance with CAN/ULC-S676, Standard for Refurbishing of Storage Tanks for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada;

2. (paragraph revoked);

3. the piping must be cleaned, inspected and protected against external corrosion.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 33.
   

   Section 3. - Demolition work
   

   O.C. 220-2007, s. 1.
   

A contractor or owner-builder may not demolish a tank unless the tank has been

1. cleaned of any petroleum product residue; and

2. purged of any vapour while ensuring that, during the demolition operation, the concentration of vapours is less than 10% of the lower explosive limit at all times.
   

   The work must be carried out in such a manner as to render the tank unusable and to prevent any accumulation of flammable vapours. The work must in addition be carried out in a safe location where the public has no access, using the equipment necessary to recover all petroleum product residue; that location must also comply with the planning by-laws in force in the territory of the municipality where the work is carried out.
   

   A contractor or owner-builder must in addition place petroleum product residue in a tank or other closed container compatible with petroleum products. The residue and materials from the dismantling must be shipped to a site authorized under the Environment Quality Act (chapter Q-2).
   

   O.C. 220-2007, s. 1.
   

   Section 4. - Piping
   

   O.C. 220-2007, s. 1.
   

The threaded joint in piping used to contain petroleum products must be made using a joint compound or polytetrafluoroethylene tape that meets the requirements of CAN/ULC Standard S642 Standard for Compounds and Tapes for Threaded Pipe Joints, published by Underwriters’ Laboratories of Canada.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 34.

Piping used to contain petroleum products must be welded in compliance with API Standard 1104 Welding of Pipelines and Related Facilities, published by the American Petroleum Institute.

O.C. 220-2007, s. 1.

Except in the case of piping supplying a marina bulk plant, a contractor or owner-builder may install a petroleum equipment installation only if it has separate pipe lines for

1. unleaded regular or premium automotive gasoline included in Class 1 petroleum products;

2. Class 1 petroleum products other than automotive gasoline;

3. Class 2 petroleum products; and

4. Class 3 petroleum products.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 35.
   

A contractor or owner-builder may not install metallic piping on a petroleum equipment installation, including its couplings, flanges and bolts, unless it is protected against external corrosion.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install the transfer pump of a petroleum equipment installation able to create a pressure greater than that which the downstream piping components can withstand, unless the pump has a safety valve and a bypass.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not use in construction work aboveground piping, valves, connections or any other material, unless they are suitable for the maximum pressure and temperature for proper operation and for the chemical properties of the liquid the piping is to contain.

The contractor or owner-builder also may not use material that cannot withstand internal stress or mechanical damage related to its use or a combustible or low-melting material subject to failure even in a light fire.

O.C. 220-2007, s. 1.

The underground piping of a petroleum equipment installation that is to pass through concrete must be installed in a sleeve to allow for expansion.

O.C. 220-2007, s. 1.

Aboveground piping that is to contain petroleum products must, to be used, have been designed to make provision for thermal expansion and contraction related to its use.

O.C. 220-2007, s. 1.

Piping that is to contain petroleum products must be installed to be accessible where it enters a building, and have inside and outside control valves.

O.C. 220-2007, s. 1.

Every underground part of piping that is to contain petroleum products must, to be used, have a double wall that meets the requirements of section 8.28 and be connected at its lowest point with a liquid-tight collector well.

The collector well must, in addition, have an automatic leak detection system with a visual and audible alarm that meets the requirements of section 8.28.

O.C. 220-2007, s. 1.

Construction work carried out on underground piping must, in addition to meeting the requirements of this Chapter, be carried out according to the manufacturer’s instructions.

O.C. 220-2007, s. 1.

A joint at the point of connection of underground piping with a tank must be a swing joint or have an underground flexible connection, unless the piping is vertical at its point of connection to the tank over its entire length.

In addition, a swing joint or flexible connection must be connected at the base of each dispenser, at the connection of a submersible pump and the vertical portion of the vent.

Despite the foregoing, a swing joint is not required if the piping is flexible.

O.C. 220-2007, s. 1.

Piping connected to an underground tank that is to supply it must be connected at the top of the tank. The piping must also be free of pockets or traps allowing liquid to accumulate, and have a minimum 1% slope towards the tank.

O.C. 220-2007, s. 1.

Piping must be backfilled

1. with clean or natural sand free of stones compacted mechanically on site in the case of steel piping;

2. with crushed stone or pea gravel in the case of fibreglass piping; or

3. according to the manufacturer’s instructions in the case of flexible piping.
   

   O.C. 220-2007, s. 1.
   

Underground piping must be backfilled with one of the materials referred to in section 8.82 in such manner that

1. the piping is bedded on at least 150 mm of backfill;

2. there is at least 150 mm of backfill measured horizontally between the piping and the excavation wall;
   

3. the backfill between each pipe is at least twice as thick as the nominal diameter of the largest pipe; and

4. the backfill above the piping is at least 450 mm deep including the finishing grade layer.
   

   O.C. 220-2007, s. 1.
   

Underground piping must, before being connected to a tank, be subjected to a leak test conducted in compliance with the following requirements:

1. for the inner wall,

   1. the ends of the pipes must be hermetically plugged;
      

   2. the pressure created inside the piping must be measured using a pressure gauge calibrated in units of not more than 10 kPa;
      

   3. air or nitrogen hydrostatic pressure of not less than 350 kPa and not more than 700 kPa must be applied;
      

   4. each connection or accessible part of the piping must be tested before being backfilled, using leak detection fluid;
      

   5. once the temperature has been stabilized and the pressure source removed, the pressure created must be maintained for at least one hour; and
      

   6. if the piping is designed to be exclusively used as suction piping, it must be leak tested according to the manufacturer’s instructions; and
      

2. for the outer wall of double-walled piping, the leak test must be conducted according to the manufacturer’s instructions.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 36.
   

Every connection to underground piping that has not been leak tested under section 8.84 must, after being connected to the tank, be subjected to an air leak test or nitrogen leak test conducted in compliance with the following requirements:

1. a safety valve of not more than 40 kPa capable of discharging the flow from the pressure source must be installed and inspected before each test;
   

2. the pressure created inside the tank and the piping must be measured using a pressure gauge calibrated in units of not more than 1 kPa;
   

3. a pressure of not less than 30 kPa and not more than 35 kPa must be applied over the entire petroleum equipment installation being tested;

4. all the connections between the tank and the piping must be leak tested with leak detection fluid while the entire installation is under pressure; and
   

5. once the temperature has been stabilized and the pressure source removed, the pressure must be maintained for at least 1 hour.
   

   O.C. 220-2007, s. 1.
   

Despite sections 8.84 and 8.85, air may not be used in a leak test for petroleum equipment that has already contained a petroleum product or that has not been purged of all petroleum product vapour.

O.C. 220-2007, s. 1.

If a leak test reveals leakage, all connections between the tank and the piping must be repaired or replaced and subjected to the tests referred to in sections 8.84 and 8.85.

O.C. 220-2007, s. 1.

Metal material that is to contain petroleum products and that is used during the installation, repair or alteration of underground piping, including galvanized steel piping, valves, vents and underground metallic connections, must be new and protected against corrosion in compliance with Appendix A of CAN/ULC Standard S603.1 External Corrosion Protection Systems for Steel Underground Tanks for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada.

Corrosion protection in compliance with that method is not required if the piping is used in a designated location for a period of less than 2 years.

O.C. 220-2007, s. 1.

Underground metallic piping installed during construction work must be installed with at least 2,000 kPa resistance screwed fittings or Schedule 40 welded fittings.

The use of tightened end joints or fully threaded joints for that purpose is prohibited.

O.C. 220-2007, s. 1.

A coupler used on underground piping must be a 2,000 kPa coupler designed for petroleum products.

O.C. 220-2007, s. 1.

A swing joint connected during construction work on threaded steel underground piping must be connected with two 90 ° elbows and a nipple.

For that purpose, the use of the following is prohibited:

1. a male-female elbow,

2. a close fully-threaded nipple, and

3. a 45 ° elbow.
   

   O.C. 220-2007, s. 1.
   

Underground galvanized steel piping may not be welded during construction work.

O.C. 220-2007, s. 1.

Non-metallic piping used during construction work must be underground.

O.C. 220-2007, s. 1.

A swing joint connected during construction work on rigid non-metallic underground piping must have a 90 ° elbow that can be connected to the petroleum product extraction system, a 1.5 metre-long non- metallic nipple connected to another 90 ° elbow in turn connected to non-metallic piping at least 1.5 m in length, installed respecting that sequence.

That type of swing joint may not be connected at the base of a dispenser.

O.C. 220-2007, s. 1.

The tank of a petroleum equipment installation installed during construction work must have a vent.

The vent may not be connected to more than one tank unless it is of a diameter that allows the vapours from the various tanks to be purged without causing the allowable stress for each tank to be exceeded.

The vent on a tank that is to contain a Class 1 petroleum product may not be connected to the vent of a tank that is to contain a Class 2 or Class 3 petroleum product.

O.C. 220-2007, s. 1.

The vent referred to in section 8.95 must, in the case of a tank that is to contain a Class 1 or Class 2 petroleum product, have a weather-proof hood, and a flame arrester device in the case of a tank that is to contain a Class 1 petroleum product.

Such a device must not create additional resistance to the flow of gases.

The vent must also be connected to the top of the tank by means of piping with a minimum 1% slope towards the tank and the aboveground portion of the vent must be protected from vehicle impact.

O.C. 220-2007, s. 1.

The vent referred to in section 8.95 must be located outside a building and positioned in such a manner that flammable vapours cannot be drawn into the building.

The end must be

1. higher than the end of the fill pipe;
   

2. at a distance of not less than 3.5 m, in the case of a tank containing a Class 1 petroleum product, or 2 m in the case of a tank containing other petroleum products;
   

3. at a distance of not less than 1.5 m from any building opening in the case of a tank containing a Class 1 petroleum product, or not less than 600 mm in the case of a tank containing other petroleum products; and
   

4. at a distance of not less than 7.5 m from any dispenser, in the case of an underground tank containing gasoline.
   

   O.C. 220-2007, s. 1.
   

Vent piping for an underground tank must have a cross-sectional area sufficient to allow filling or withdrawal at the maximum rate without causing the allowable stress for the tank to be exceeded.

O.C. 220-2007, s. 1.

Vent piping for an underground tank must be installed so that it is free from any device likely to cause back pressure exceeding the allowable stress for the tank.

In the case of an underground tank to be used to store a Class 2 or Class 3 petroleum product, vent piping may be fitted with return bends, coarse screens or other devices designed to minimize the entry of material.

O.C. 220-2007, s. 1.

The minimum diameter of the vent referred to in section 8.99 must respect the values in the following Table 4 if the vent piping does not have more than 7 elbows; in other cases, the diameter must exceed the values so that the allowable stress for the tank is not exceeded.

TABLE 4

VENT DIAMETERS (mm)

Maximum flow Pipe length

Rate (L/min)                                                                       

N.B.: Vent size is based on the highest filling or emptying flow rate.

O.C. 220-2007, s. 1.

The vent referred to in section 8.99 may not extend more than 25 mm inside an underground tank, unless it has an alarm.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install an aboveground tank unless it has safety venting that meets API Standard 2000, Venting Atmospheric and Low-Pressure Storage Tanks, published by the American Petroleum Institute or one of the construction standards referred to in section 8.24.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 37.

A contractor or owner-builder may not install, in a petroleum equipment installation, aboveground piping that crosses a road, public road or public service installation, unless the piping meets the requirements of CAN/CSA Standard Z662, Oil and Gas Pipeline Systems, published by the CSA Group.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 38.

An aboveground piping system installed on a petroleum equipment installation must have bypasses or safety valves capable of preventing over-pressurization.

O.C. 220-2007, s. 1.

Aboveground piping used during construction work must have been designed and installed so that petroleum product velocity in the piping does not exceed 2.5 m/s, unless the piping is directly connected to a marine wharf.

In addition, insulation wrapping on aboveground piping must be non-combustible and, if inside a building, must meet the requirements of Chapter I.

O.C. 220-2007, s. 1.

Aboveground piping that is to contain petroleum products, the piping valves and fill pipe of a petroleum equipment installation installed during construction work must display permanent identification of contents in compliance with the document entitled “Colour-Symbol System to Mark Equipment and Vehicles for Product Identification”, published by the Canadian Fuels Association.

In addition, the piping may not be red in colour.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 39.

Flanged joints for aboveground piping must be provided in welded systems at intervals that will facilitate dismantling and avoid subsequent in-place cutting and welding operations.

Flanged joints must be made with forged or cast steel flanges designed, manufactured and installed in compliance with ASME Standard B16.5 Pipe Flanges and Flanged Fittings: NPS ½ through NPS 24 Metric/ Inch Standard, published by the American Society of Mechanical Engineers; bronze flanges may be used on copper or brass piping not exceeding 50 mm in diameter.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 40.

Only welded, screwed or flanged connections may be installed on piping inside a tank dike.

O.C. 220-2007, s. 1.

Bolting materials for flanged connections installed on aboveground piping that is to contain petroleum products must be of alloy steel corresponding to Grade B-7 in ASTM A193/A193M, Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications, published by the American Society for Testing and Materials International.

Gaskets in flanged connections must be of a material resistant to the liquid contained in the piping and capable of withstanding temperatures of at least 650 °C without damage.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 41.

At the time of installation, aboveground piping must be subjected to a leak detection test conducted in compliance with the following requirements:

1. a test pressure of not less than 350 kPa, or 1 1/2 times the maximum operating pressure that may be produced within the piping, whichever is greater, must be created within the piping;

2. the piping system and its joints must be inspected with leak detection fluid;

3. the pressure created in the piping must be measured using a pressure gauge calibrated in units of not more than 4 kPa for gauge pressure equal to or less than 700 kPa and in units not greater than 1% of the test pressure, if it exceeds 700 kPa and the piping system is designed for such pressures.
   

   If test pressures exceed the design pressures for pumps or similar components in the piping system, the pumps or components need not be pressure tested.
   

   O.C. 220-2007, s. 1.
   

(Revoked).

O.C. 220-2007, s. 1; O.C. 87-2018, s. 42.

Aboveground piping must be installed in such manner as to reduce vibrations and stress to a minimum and not come directly into contact with the ground.

The use of expansion shields to suspend aboveground piping is prohibited in lightweight concrete or gypsum assemblies.

Aboveground piping must also be protected by barriers in areas subject to vehicle impact.

O.C. 220-2007, s. 1.

The installation of the following is prohibited:

1. aboveground outdoor piping on walls unless the walls are of non-combustible construction;

2. outdoor piping above windows;

3. outdoor piping above roofs, except roofs that are non-combustible and impermeable to petroleum products with provision for the collection of spillage to prevent a fire; and
   

4. piping containing petroleum products in service tunnels used for pedestrian traffic other than tunnels reserved for maintenance personnel.
   

   O.C. 220-2007, s. 1.
   

(Revoked).

O.C. 220-2007, s. 1; O.C. 87-2018, s. 43.

A contractor or owner-builder may not install valves or safety valves in aboveground piping that is to carry petroleum products, unless they meet the manufacturing specifications in either of the following standards: ULC/ORD-C842 Guide for the Investigation of Valves for Flammable and Combustible Liquids or CAN/ULC-S651, Standard for Emergency Valves for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 44.

A shut-off valve must be installed on the aboveground piping of a petroleum equipment installation at the following locations:

1. at connections of the piping to aboveground tanks;
   

2. on supply piping where it enters buildings or any other works or place immediately accessible from the outside of the buildings or works;

3. on branch lines from the main supply line;

4. on supply lines at petroleum products dispensing locations;

5. at connections of meters or air bleeder valves; and

6. at connections of pumps.
   

   O.C. 220-2007, s. 1.
   

Diaphragm valves must have no direct connections to aboveground piping between the liquid and air section.

O.C. 220-2007, s. 1.

Globe valves installed on aboveground piping must be arranged so that the packing is on the low pressure side.

O.C. 220-2007, s. 1.

Rising stem or other indicating-type valves must be used to determine whether the valves are open or shut.

O.C. 220-2007, s. 1.

Cast-iron meters installed on aboveground piping must have steel valves on each side.

O.C. 220-2007, s. 1.

Valves installed on aboveground piping must be identified in compliance with section 8.106.

O.C. 220-2007, s. 1.

Water bleed valves installed on aboveground tanks must be made of steel and protected from impact if the valves are outside the aboveground tanks.

O.C. 220-2007, s. 1.

Heating equipment for aboveground piping containing petroleum products that is installed on a petroleum equipment installation must be designed not to overheat or create an ignition source for the liquids being heated.

For that purpose, the heating equipment may consist of

1. steam lines if

   1. the minimum steam temperature and pressure to make the liquid fluid are used;
      

   2. a pressure regulator is provided on the steam line with a relief valve on the downstream side of the regulator; and

   3. the steam lines and piping are insulated in compliance with the requirements of Chapter I;

2. a set of electrical heating cables; and

3. low-voltage alternating current passing through the piping provided that

   1. the heated sections of piping are isolated from the unheated sections by non-conductive material; and

   2. all piping and fittings are enclosed by insulating coverings that prevent accidental grounding of the heating equipment.
      

      O.C. 220-2007, s. 1.
      

The intake end of a fill pipe or gauge pipe of an underground tank must be

1. located outside a building, more than 1.5 m from any building opening and in a place free of any ignition source;

2. (paragraph revoked);

3. capable of filling a tank containing motor fuel on land not forming part of a public road within the meaning of the second paragraph of section 66 of the Municipal Powers Act (chapter C-47.1).
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 45.
   

A remote intake end of a fill pipe referred to in section 8.124 from an underground tank must be located lower than other outlets from the tank, unless the tank

1. is a tank with an overfill protection device that meets CAN/ULC-S661, Standard for Overfill Protection Devices for Flammable and Combustible Liquid Storage Tanks, published by Underwriters’ Laboratories of Canada, adapted so as to include in the tank the volume of petroleum product that could be contained in the fill pipe without exceeding the maximum filling level of the tank as specified in the Standard; or
   

2. is a tank with a backflow device inside the piping connected to other openings.
   

   O.C. 220-2007, s. 1; O.C. 87-2018, s. 46.
   

A fill pipe installed on an underground tank must be connected to the top part of the tank.

O.C. 220-2007, s. 1.

A contractor or owner-builder may not install an underground tank that is to contain motor fuel, unless the tank has an overfill protection device that meets the requirements of CAN/ULC-S661, Standard for Overfill Protection Devices for Flammable and Combustible Liquid Storage Tanks and a spill containment device that meets the requirements of CAN/ULC-S664, Standard for Containment Sumps, Sump Fittings, and Accessories for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 47.

The intake end of a fill pipe or gauge pipe installed on an underground tank must have a tight- fitting cap.

It must also be protected against vehicle impact by at least one barrier if the pipe extends above ground level.

If the intake end of a fill pipe or gauge pipe is below or at ground level, it must be protected by a box with a cover made of metal or concrete that prevents any transmission of surface loads to the tank.

O.C. 220-2007, s. 1.

A fill pipe installed on a tank that is to store motor fuel must extend to not more than 200 mm from the bottom of the tank and be fixed in such a way as to minimize vibration.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 48.

If a petroleum equipment installation is altered to replace an underground tank, steel piping that is not protected against corrosion and connected to the tank must be removed from the ground, unless it is subjected to a leak detection test that meets the requirements of the second paragraph indicating that it is liquid-tight and protected against corrosion in compliance with NACE SP0169 Control of External Corrosion on Underground or Submerged Metallic Piping Systems or NACE SP0285, Corrosion Control of Underground Storage Tank Systems by Cathodic Protection, published by NACE International.

The leak detection test must be conducted using a hydrostatic or vacuum method capable of detecting leaks of 1.2 L/h with a 95% probable success rate and a margin of error of no more than 5%, or using any other method capable of detecting leaks of 0.76 L/h, with the same probabilities, with the exception of pneumatic tests using gas, in the case of tanks except observation well surveillance systems. The methods must in addition meet the requirements of one of the following standards: EPA 530/UST-90/004 Standard Test Procedures for Evaluating Leak Detection Methods: Volumetric Tank Tightness Testing Methods, EPA 530/ UST-90/007 Standard Test Procedures for Evaluating Leak Detection Methods: Statistical Inventory Reconciliation Methods, published by the Environmental Protection Agency.

O.C. 220-2007, s. 1; O.C. 87-2018, s. 49.

Section 5. - Maintenance work

O.C. 220-2007, s. 1.

Construction work carried out on piping for a petroleum equipment installation must be carried out only when it is not under pressure.

O.C. 220-2007, s. 1.

The piping for a petroleum equipment installation must be drained before being dismantled.

O.C. 220-2007, s. 1.

The ambient air must be tested with a flammable vapour indicator before cutting or welding work on a petroleum equipment installation to ensure that no explosive concentration is present.

Two portable extinguishers having a minimum rating of 20-B: C must also be available on the work site while the work is being carried out.

O.C. 220-2007, s. 1.