printreg, December, 2003
Calculating TPQ for SARA Reporting


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From: Debra Jacobson (djacobson@istc.illinois.edu)
Date: Fri, 05 Dec 2003 14:19:40


Most printers do not store or handle extremely hazardous substances, but it may be worthwhile reviewing the list just to assure you do not. In addition, the calculation to determine volume stored or used is helpful to review as it applies to all SARA reportable chemicals.
Debra Jacobson

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How to Calculate the TPQ in Mixtures Containing Extremely Hazardous Substances (EHSs)

To comply with Sections 302 (Facility Notification) and 303 (Emergency Coordinator Notification) of SARA Title III, you must determine the actual quantity of extremely hazardous substances (EHSs) in mixtures and compare that number to the published threshold planning quantity (TPQ).

To perform this calculation, 40 CFR 355.30(e) specifies that the concentration of the EHS by weight percent is multiplied by the mass of the mixture (in pounds) contained in a container or storage vessel. This calculation should be performed for all mixtures containing an EHS in which the EHS component is greater than 1% by weight.

To see the current list of EHSs and their corresponding TPQs, go to the Title III List of Lists document at
http://yosemite.epa.gov/oswer/ceppoweb.nsf/content/chemicalinfo.htm#title http://www.access.gpo.gov/nara/cfr/cfrhtml_00/Title_40/40cfr355_00.html

Source: "reg of the day" listserv operated by Tammy Silverthorne @ the Environmental Resource Center



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