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Draft Cleaner Technologies Substitutes Assessment (CTSA): Screen Reclamation - Chapter 2
EPA 744R-94-005a
September 1994
Screen Reclamation Chemicals
Chapter 2, in which the characteristics of individual chemicals are detailed, is intended for use as a reference section. The specific information concerning each chemical was developed to support the risk assessment of screen reclamation products. Such information includes physical/chemical properties, industrial synthesis, aquatic toxicity, environmental fate, and a hazard summary. Tables II-4 through II-6 detail aquatic toxicity and hazard summary data for the chemicals in the screen reclamation use cluster. The preface to these exhibits explains the technical language and abbreviations used throughout the exhibits.
The regulatory status of a chemical was also provided as a ready reference; Table II-3 lists those chemicals used in screen reclamation which trigger federal environmental regulations. In addition, market profile information was developed to assess the overall production of the chemical, and its use in screen reclamation. Originally, if it was determined that more than 5 percent of the U.S. production volume of a chemical was used in screen reclamation, an analysis of the bulk chemical production, including occupational and population exposure assessments, would be undertaken. However, due to the lack of information on the quantity of specific chemicals used in screen reclamation, the latter analysis was not developed for any one chemical. Instead, economists at EPA developed a methodology for estimating the quantity of specific chemicals used in screen reclamation; this methodology is outlined in Chapter 3.
The chemicals that are discussed in this chapter comprise the screen
reclamation use cluster; Table II-1 lists all of the chemicals in the
screen reclamation use cluster, as well as their particular function in
screen reclamation. Table II-1 also provides the page number on which
information about a specific chemical can be found. Table II-2 is a generic
categorization of some of the screen reclamation chemicals that was developed
to protect the proprietary nature of the alternative screen reclamation
products submitted by manufacturers. In Chapters 4 and 5, specific chemicals
in ink removers, emulsion removers and haze removers are occasionally
not identified by name, but by a generic category. For example, the product
category "propylene glycol series ethers" might refer to the
presence of tripropylene glycol methyl ether, propylene glycol methyl
ether and methoxypropanol acetate. Although this categorization was developed
to protect proprietary formulations, the risk assessment conducted for
each type of screen reclamation product details the hazard and risk associated
with only those chemicals that occur in the actual product formulation.
Chapter II: Screen Reclamation Chemicals [685 K PDF]
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