Assessment of the Effectiveness of Room Enclosures with Ventilation Systems inReducing Risk at Dry Cleaning Facilitites Using Perchloroethylene

摘要

The first objective of this project was to obtain emission data for estimatingperchloroethylene capture efficiencies for the types of room enclosures currently in use. The second objective was to develop guidelines for dry cleaning industry in terms of specifications, methods of installation, kinds of control systems, costs of operation, estimates of the capture efficiencies of these systems and their risk reduction potential. The control measures on the nine facilities varied from full vapor barrier room enclosures (three facilities), partial vapor barrier room enclosures (three facilities), to local ventilation system (three facilities). AVES and ERMI (subcontractor) selected nine test facilities in this project, with the help of Bay Area AQMD Staff. The control measures on the nine facilities varied from ventilated room enclosures, partial ventilated room enclosures, to local ventilation system. To determine the health risk (potential cancer cases per million) by dry cleaning processes, capture efficiencies of perchloroethylene by the three ventilation systems are investigated. Samples were collected at each facility from ventilation systems, waste streams, fabrics, lint and indoor air inside the facilities.