PDFWAC 296-307-45515
Provide bottom drains.
Exemption: | A bottom drain is not required if: |
1. The viscosity of the liquid makes it impractical to empty the tank by gravity or pumping; | |
OR | |
2. The dip tank has an automatic closing cover that meets the requirements of WAC 296-307-45530. |
(1) The employer must provide a bottom drain on all dip tanks that hold more than five hundred gallons of liquid.
(2) The employer must make sure the bottom drain:
(a) Is properly trapped;
(b) Will empty the dip tank during a fire;
(c) Has pipes large enough to empty the tank within five minutes;
(d) Uses automatic pumps if gravity draining is not practical;
(e) Is capable of both manual and automatic operation;
(f) Discharges to a safe location.
Note: | Discharges to a safe location could be a: |
1. Safe location outside the building; | |
OR | |
2. Closed, properly vented salvage tank or tanks that can hold more than the dip tank. |
(3) The employer must make sure manual operation of the bottom drain is performed from a safe and easily accessible location.