Section 23.111. Solvents

(a) No dry cleaning or dyeing machine or system approved by the Department for the use of either a Class I, II, III or IV solvent shall have used therein any solvent other than that for which such machinery has been approved except that Class III solvent may be used in a machine or system approved for Class II solvent. These systems shall be provided with a name plate, setting forth the name of the manufacturer, model number and the type of solvent for which the equipment has been approved.

(b) All transfers of solvents shall be effected through continuous piping and all pipe connections or threaded joints shall be made up with a suitable sealing compound and all outlets or drain lines shall be drained to settling or storage tanks.

(c) No solvent shall be settled or stored in any open or unprotected vessel or tank, except scrubbing, spotting and brushing operations may be carried on in drycleaning or dyeing rooms with the use of not more than three pans or containers, which shall be metallic, and none of which shall contain more than three gallons of solvent. All solvents shall be returned to settling or storage tanks as soon as these operations are completed.