Sec. 226-1.5. Operating requirements

Except as otherwise allowed by the department pursuant to section 226-1.6 of this Subpart, the following operating practices are required by a person conducting solvent cleaning:

(a) Cold cleaning degreasing.

Clean parts shall be drained at least 15 seconds or until dripping ceases.

(b) Open-top vapor degreasing.

(1) Minimize solvent carry-out by the following measures:

(i) rack parts to allow full drainage;

(ii) move parts in and out of degreaser tank at less than 11 ft/min;

(iii) degrease the work load in the vapor zone at least 30 seconds or until condensation ceases;

(iv) tip out any pools of solvent before removal; and

(v) dry parts for at least 15 seconds before removal.

(2) Work loads shall not occupy more than half the open-top area of the degreaser tank.

(3) Spray only below the vapor level.

(c) Conveyorized degreasing.

(1) Exhaust ventilation rate shall not exceed 125 percent of the minimum ventilation rate required for the protection of workers in the vicinity of the degreaser.

(2) Minimize carry-out emissions by:

(i) proper racking for best drainage; and

(ii) maintaining a conveyor speed at less than 11 ft/min.

(3) Water must not be visibly detectable in the solvent leaving the water separator.