4620.4510 MEASUREMENT OF AIR QUALITY CONDITIONS.


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Subpart 1.

Measuring air quality.

Owners or operators of indoor ice arenas must measure carbon monoxide and nitrogen dioxide air concentrations in each arena when internal combustion engine-powered ice maintenance equipment is used.


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Subp. 2.

Persons who can take measurements.

Measurements must be made by an individual who has received training as specified in part 4620.4450.


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Subp. 3.

Measurements for ice resurfacing.

Owners or operators must measure air concentrations at least twice per week after using an internal combustion engine-powered ice resurfacer. Measurements must be taken:

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A.

at board height, inside the boards, and at the centerline of the ice;


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B.

20 minutes after completing resurfacing unless the commissioner has granted the operator approval to measure under an alternative schedule;


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C.

at times of maximum use of the resurfacing machine; and


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D.

at least once on Saturday or Sunday of each week that the arena is open to the public.



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Subp. 4.

Measurements for ice edging.


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A.

Owners or operators must measure air concentrations at least once per week after using an internal combustion engine-powered ice edger. Measurements must be taken following a time of maximum ice edger use at board height, inside the boards, and at the centerline of the ice:

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(1)

20 minutes after completing edging if the arena building is open to the public when edging occurs; or


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(2)

before the public reoccupies the arena, if the arena is not open to the public when edging occurs.



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B.

Owners or operators may measure under an alternative schedule if the commissioner has approved one.



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Subp. 5.

Measurement records.

Owners or operators must keep a record of measurement findings and make them available to the commissioner upon request.


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Subp. 6.

Additional measurements.

Owners or operators must make additional measurements as determined by the commissioner.