Page 67 - Air Pollution Control Engineering

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Air Quality and Pollution Control 47

Fig. 19. Phases I and II RCRA air standards overlaid onto hazardous waste management.
(From US EPA.)

erly controlled. To prevent cross-media pollution, the RCRA 3004(n) air standards work
in concert with the LDR.
Another RCRA program establishes location standards for the siting of new facilities.
These standards also require consideration of air emissions.
Figure 19 shows an overview of hazardous waste management. After a hazard is
generated, it may go through a series of different processes and waste-management
units before disposal. For example, hazardous waste may be stored or treated in
tanks and containers. Various types of containers can be used for storage, including
55-gal drums, dumpsters, tank trucks, and railcars. Treatment of the hazardous waste
to meet LDR can occur early in the waste-management process, or just prior to dis-
posal. Additionally, hazardous waste management can occur at the generator site
(on-site) or at commercial TSDF (off-site). A storage and transfer station may be
used to handle waste off-site prior to its being transported to another location for
final treatment and disposal.
As shown in Figure 19, the coverage of the Phase I and II RCRA air standards is
overlaid onto the hazardous-waste-management units. As required in Phase I standards,
organic air emissions from process vents from treatment units specifically identified in
the standards are limited. Additionally, Phase I limits the air emission from equipment
leaks at waste-management units.