Section 250-RICR-120-05-23.10 - Requirements for Carbon AdsorbersA. A secondary carbon adsorber operated to comply with § 23.7(A)(1) of this Part shall adhere to the following requirements: 1. The carbon adsorber must be designed to function with a refrigerated condenser complying with the specifications in § 23.8 of this Part;2. The carbon adsorber must reduce the perchloroethylene concentration in the drum to three hundred (300) ppm or less;3. The dry cleaning control system must be designed so that the gas-vapor stream passes through the secondary carbon adsorber after the final cool-down cycle and immediately before the machine door is opened;4. The carbon adsorber system must use non-contact steam or hot air for desorption, and must be desorbed in accordance with the manufacturer's instructions or weekly, whichever is more frequent; and5. The owner or operator shall measure the perchloroethylene concentration in the drum weekly according to the following specifications: a. Measurements shall be made using a colorimetric detector tube designed to measure a concentration of three hundred (300) ppmv of perchloroethylene to an accuracy of ± seventy-five (75) ppmv;b. Colorometric detector tubes shall be used according to the manufacturer's instructions; and c. Measurements shall be taken immediately upon opening the door of the dry cleaning machine at the end of the drying cycle in the space above the articles.250 R.I. Code R. 250-RICR-120-05-23.10
Amended effective 12/24/2018