New York Codes, Rules and Regulations › Title 6 - DEPARTMENT OF ENVIRONMENTAL CONSERVATION › Chapter III - AIR RESOURCES › Subchapter A - PREVENTION AND CONTROL OF AIR CONTAMINATION AND AIR POLLUTION › Part 232 - Dry Cleaning Facilities › Subpart 232-2 - Perchloroethylene Dry Cleaning Equipment › Section 232-2.4 - Equipment standards and specifications

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Specific equipment standards and emission
					 control specifications:
(1) Vapor barrier
					 rooms. All co-located commercial and residential perc dry cleaning facilities
					 must be equipped with a vapor barrier room. Vapor barrier rooms must, at a
					 minimum, enclose the perc dry cleaning equipment. They must be constructed of
					 polyvinyl chloride, PVC sheet 22 mil thick (0.022 in.), sheet metal, metal foil
					 faced composite board, or other equivalent materials that are impermeable to
					 perc vapors. All joints, seams and penetrations of the vapor barrier room must
					 be sealed except for entry doors and outside air inlet and exhaust vents. Entry
					 doors may only be open when a person is entering or exiting the room
					 enclosure.
(2) Vapor barrier room
					 ventilation. Vapor barrier rooms must be equipped with a general exhaust
					 ventilation system that is completely separate from the ventilation system(s)
					 serving other areas of the building. The general exhaust ventilation system
					 must be located near the dry cleaning machinery and in the vapor barrier room
					 or connected to a separate room that exhausts the perc vapor emissions to the
					 outside air. This dry cleaning general exhaust ventilation system must be
					 operated at all times the facility is open for business and be capable of at
					 least one air change every five minutes.
(3) External door fans. All third generation
					 perc dry cleaning machines must be equipped with an external door fan. Fourth
					 generation perc dry cleaning machines may only be equipped with an external
					 door fan if installed prior to the effective date of this Subpart. External
					 door fans must meet the following requirements:
(i) External door fans must include a
					 mechanical exhaust fan that is activated when the loading door is open; drawing
					 room air from outside the loading door, through the machine drum and a carbon
					 adsorber prior to venting outside the building. A minimum inward air velocity
					 of 100 feet per minute must be maintained through the effective door opening
					 area of the loading door of the machine.
(ii) External door fans must not recirculate
					 vapors into the workroom and must be properly vented to the outside
					 air.
(iii) External door fans must
					 be controlled to a design perc emission standard of five ppm and an in-use
					 maximum perc compliance standard of 20 ppm.
(4) Primary emission control systems.
					 Refrigerated condensers must:
(i) be equipped
					 with temperature or pressure gauges to monitor performance and demonstrate
					 compliance of the refrigerated condenser;
(a)
					 where temperature gauges are installed to demonstrate compliance, the outlet
					 vapor temperature must be less than or equal to 45° F (7.2° C) during
					 the final cool-down phase and lower the temperature of the air-perc vapor
					 stream entering and exiting the refrigerated condenser by at least 20° F
					 (11.1° C). Temperature must be measured with a graduated thermometer,
					 thermocouple or equivalent instrument, with a minimum range from 0° F
					 (-18° C) to 150° F (66° C) and accuracy of ±2 °F
					 (±1.1 °C), that measures the temperature of the outlet vapor stream
					 and is easily visible to the operator; or
(b) where pressure gauges are installed to
					 demonstrate compliance, the refrigerant high and low vapor pressures must be in
					 the range specified in the manufacturer's operating instructions during the
					 heated and cool-down phases of the drying cycle;
(ii) reduce the perc vapor concentration in
					 the drum to 8600 ppm or less upon completion of the cool-down phase;
(iii) be equipped with a drying
					 sensor/controller that extends the drying time at least four minutes beyond the
					 point where the perc recovery rate is less than 40 ml/min, or the perc vapor
					 concentration in the drum is less than 8,600 ppm, on third and fourth
					 generation machines installed on or after May 15, 1997; and
(iv) be operated with a diverter valve where
					 an external door fan has been installed.
(5) Secondary control systems. Integral
					 carbon adsorbers must:
(i) be designed to
					 function in conjunction with a compliant primary control system;
(ii) reduce the perc vapor concentration in
					 the drum to 500 ppm or less at the immediate completion of the drying cycle and
					 prior to the activation of any fugitive emissions control system on the
					 following dry cleaning machines without an external door fan:
(a) fourth generation machines installed on
					 or before September 22, 1993 at major dry cleaning facilities;
(b) fourth generation machines installed
					 before May 15, 1997 at non-major dry cleaning facilities;
					 and
(iii) reduce the perc
					 vapor concentration in the drum to 300 ppm or less at the immediate completion
					 of the drying cycle and prior to the activation of any fugitive emissions
					 control system on the following dry cleaning machines:
(a) fourth generation machines installed
					 after September 22, 1993 at major dry cleaning facilities;
(b) fourth generation machines, installed on
					 or after May 15, 1997, that are not equipped with an external door fan at
					 non-major dry cleaning facilities; and
(iv) be designed for non-contact steam, or
					 hot air stripping, and must be stripped or desorbed, at least weekly and, in
					 accordance with manufacturer's instructions.