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tBAc

tertiary-Butyl Acetate Assessment

Overview

tBAc

In past rule amendments, industries affected by volatile organic compound (VOC) regulations petitioned the SCAQMD to exempt compounds from the VOC definition to meet more stringent limits. A limited exemption in Rules 1113 – Architectural Coatings and 1151 - Motor Vehicle and Mobile Equipment Non-Assembly Line Coating Operations was allowed for tBAc in 2006 and 2005, respectively. Proposed amendments to Rules 1168 - Adhesive and Sealant Applications and 1107 - Coating of Metal Parts and Products were put on hold due to toxicity concerns and worker exposure issues involving tBAc.  In August 2015, the Office of Environmental Health Hazard Assessment (OEHHA) released a draft Technical Support Document for Cancer Potency Factors (CPF) for public review that is higher (more carcinogenic) than previously estimated.  This raised concerns regarding the existing limited exemption for tBAc.  During the 2016 amendment to Rule 1113, staff included a resolution to review the existing limited exemption for tBAc and analyze the health risks using the new draft inhalation CPF.  The preliminary draft discusses the regulatory history, health risk analysis, and recommendations for the exemption of tBAc.  The preliminary draft tBAc paper can be accessed in the link below.    

 


 

Documents and Presentations


Draft tBAc Assessment White Paper (PDF)
Release Date: April 2017 

Preliminary Draft tBAc Assessment White Paper (PDF) 
Release Date: October 2016

Working Group Presentation
November 1, 2016 (PDF)


Meetings

 
Stationary Source Meeting  

Date:

   Friday, April 21, 2017        

Time:

   10:30 a.m. PDT

Location:

   SCAQMD Headquarters

   21865 Copley Drive

   Diamond Bar, CA 91765

   Conference Room CC-8


Teleconference Meeting  

Date:

   Tuesday, April 11, 2017

Time:

   10:00 a.m. PDT

Phone Number:

   1-866-244-8528

Passcode:

   649795


Stationary Source Meeting

Date:

   Friday, November 18, 2016

Time:

   10:30 a.m. PST

Location:

   SCAQMD Headquarters

   21865 Copley Drive

   Diamond Bar, CA 91765

   Conference Room CC-8

Working Group Meeting

Date:

   Tuesday, November 1, 2016

Time:

   11:00 a.m. PDT

Location:

   SCAQMD Headquarters

   21865 Copley Drive

   Diamond Bar, CA 91765

   Conference Room GB





Heather Farr
Hfarr@aqmd.gov
909-396-3672
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South Coast Air Quality Management District

21865 Copley Dr, Diamond Bar, CA 91765

909-396-2000

 

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