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EPA/SWER RIN: 2050-AF08 Publication ID: 2012 
Title: Emergency Planning and Community Right-to-Know Act: Modification to the Threshold Planning Quantity Methodology for the Extremely Hazardous Substances That are Solids in Solution 
Abstract: In March 2012, EPA finalized an alternative approach for applying the threshold planning quantity (TPQ) for chemicals on the Extremely Hazardous Substances (EHSs) List that are handled as non-reactive solids in solution. Previously, the TPQs for solids in solution were based on the assumption that the entire quantity of the solid chemical at a facility could potentially be released to air in the event of an accident. The final rule allows facilities to multiply the amount of non-reactive solid EHS in solution on-site by 0.2 before comparing it to its TPQ, based on experimental data indicating that only 20% of aerosols from accidental releases of solids in solution would disperse beyond a facility's fenceline. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 355   
Legal Authority: 42 USC 1102   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  04/15/2011  76 FR 21299   
Final Rule  03/22/2012  77 FR 16679   
Additional Information: Docket #:EPA-HQ-SFUND-2010-0586. This action includes retrospective review under EO 13563; see: http://www.epa.gov/regdarrt/retrospective/history.html.
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: Businesses  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL: www.epa.gov/oem   Public Comment URL: NPRM - http://www.regulations.gov/#!documentDetail; D=EPA-HQ-SFUND-2010-0586-0001  
RIN Data Printed in the FR: No 
Agency Contact:
Kathy Franklin
Environmental Protection Agency
Solid Waste and Emergency Response
1200 Pennsylvania Avenue NW, Mail Code 5104A,
Washington, DC 20460
Phone:202 564-7987
Email: franklin.kathy@epa.gov

Sicy Jacob
Environmental Protection Agency
Solid Waste and Emergency Response
1200 Pennsylvania Avenue NW, Mail Code 5104A,
Washington, DC 20460
Phone:202 564-8019
Fax:202 564-2625
Email: jacob.sicy@epa.gov