§ 12-06 Equipment Standards and Specifications.
RCNY § 12-06
(a)Specific equipment standards and emission control specifications: (1) Vapor barriers. Vapor barriers must, at a minimum, enclose the dry cleaning equipment. Vapor barriers can be constructed of polyvinyl chloride, PVC sheet 22 mil thick (0.022 in.), sheet metal, metal foil face composite board, or other equivalent materials that are impermeable to perc vapors. Vapor barriers must be constructed so that all joints and seams are sealed except for inlet makeup air and exhaust openings and entry doors. Entry doors may only be open when a person is entering or exiting the room enclosure.
(2)General exhaust ventilation system. Dry cleaning facilities which are co-located must be equipped with a vapor barrier and 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 or connected to a separate room enclosure with a vapor barrier exhausting emissions to the outer air. The system shall be designed and operated to maintain a negative pressure in the room enclosure whenever the dry cleaning machine(s) is operating. This dry cleaning general exhaust ventilation system must be operated at all times when the dry cleaning machine(s) is in operation, and during maintenance operations and must be capable of at least one air change per five minutes.
(3)Door fan/local exhaust ventilation systems.
(i)All first, second and third generation dry cleaning equipment must be equipped with a door fan/local exhaust ventilation system. This system must include a mechanical exhaust fan that is activated when the loading door is open, drawing air from the machine drum causing fresh air to be drawn in through the loading door. A minimum inward air velocity of 100 fpm, must be maintained through the effective door opening area of the loading door of the machine.
(ii)Door fan/local exhaust ventilation systems must not recirculate vapors into the workroom and must be properly vented to the outer air.
(iii)Door fan/local exhaust ventilation emissions must be controlled to a design emission standard of five ppm perc with an in-use maximum compliance standard of 20 ppm.
(4)Process Ventilation Emissions – Interim Standards.
(iv)The exhaust damper of a vented first or second generation machine must be completely closed when the machine is not being vented, and must not leak vapors into the workroom or the outer air.
(5)Primary emission control systems. Refrigerated condensers or equivalent closed-loop vapor recovery systems must meet the following requirements: (i) Refrigerated condensers must be capable of achieving an outlet vapor temperature downstream of any by-pass of the condenser less than or equal to 45°F (7.2°C) during the final cool down cycle, and achieve a concentration of 8600 ppm or less perc in the drum upon completion of the drying cycle.
(v)Equivalent closed-loop vapor recovery systems or other control device must use a technology that has been demonstrated, pursuant to the requirements of 15 RCNY § 12-17, to achieve at least 90 percent by weight emission reduction based upon the amount of perc entering and leaving the control device.
(6)A secondary control system must: (i) be designed to function with a primary control system complying with all requirements for third generation equipment.
(7)Spill containment. All new third and fourth generation, or used, reinstalled dry cleaning equipment must be equipped with a spill containment system capable of containing 125 percent of the capacity of the largest dry cleaning perc tank or vessel associated with the dry cleaning machine.
(b)To determine which standards will apply to a particular dry cleaning facility, first determine whether the facility is new or existing. Then determine whether the facility is a stand-alone or is co-located. If co-located, determine whether it is in a commercial or residential building. Finally, for each piece of equipment there are two primary issues addressed by this Rule – the type of emissions control and the location of any process ventilation emission points. Process ventilation emissions apply only to transfer and dry-to-dry vented equipment, not to door fans, general or other ventilation. In all, there are six different categories for which equipment standards are provided as follows: 1) New stand-alone facilities – Equipment requirements 2) Existing stand-alone facilities – Replacement or addition of equipment 3) Existing stand-alone facilities – Retrofitting of equipment 4) New mixed-use facilities – New equipment 5) Existing mixed-use facilities – Replacement or addition of equipment 6) Existing mixed-use facilities – Retrofitting of equipment (1) New stand-alone facilities – equipment requirements. The following types of new and/or used equipment are allowed in new stand-alone facilities.
(1)If the machine has been controlled with either an azeotropic control device plus small carbon adsorber or converted to a closed-loop third generation machine having an integral or external primary refrigerated condenser (the water cooled condensing system having been eliminated) and has a door fan, meeting the requirements of paragraph (a)(3) of this section, no additional control is required.
(c)Mixed-use – residential – uncontrolled. Equipment must be retrofitted with either an azeotropic control device plus small carbon adsorber (provided EPA publishes a determination that an azeotropic control device is equivalent to a refrigerated condenser), or converted to third generation equipment by adding an integral or external primary refrigerated condenser (eliminating the water cooled condensing system) and a door fan as specified in paragraph (b)(3) of this section immediately upon the effective date of this Rule. Alternatively, the equipment must be replaced with fourth generation equipment within the same time limit. The retrofit of this equipment is only an interim measure and all retrofitted equipment of this type must be removed from service by January 1, 2000.
(d)Mixed-use – residential – controlled.
