Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 63, Subpt. IIIII, Tbl. 4 Table 4 to Subpart IIIII of Part 63—Work Practice Standards—Requirements for Mercury Liquid Collection

1. Open-top containers

a. At least once each 72 hours

i. If you spill liquid mercury during collection or transport, you must take the action specified in Table 3 to this subpart for liquid mercury spills and accumulations

ii. From the time that you collect liquid mercury into a temporary container until the time that you store the liquid mercury, you must keep it covered by an aqueous liquid

iii. Within 4 hours from the time you‘ collect the liquid mercury, you must transfer it from each temporary container to a storage container that meets the specifications in Table 1 to this subpart.

2. Vessels, low point drains, mercury knock-out pots, and other closed mercury collection points

a. At least once each week

See 1.a.i through iii above.

3. All other equipment

a. Whenever maintenance activities require the opening of the equipment

See 1.a.i. through iii above.