Email from Nesa Dunn, Global Safety Labs to Margaret Sheppard, EPA re: Firebane 1179

From: Nesa Dunn <ndunn@gsl - inc.com> To: Margaret Sheppard/DC/USEPA/US@EPA Cc: Bella Maranion/DC/USEPA/US@EPA, "Mitchael C. Freeman" <mcfreeman@gsl - inc.com>,

Nathaniel Jutras/DC/USEPA/US@EPA, Melissa Fiffer/DC/USEPA/US@EPA, "Mukhi, Neha" <NMukhi@icfi.com>, "M Wa gner@icfi.com" <M Wa gner@icfi.com> Date: 05/27/2011 06:12 PM Subject: RE: Firebane 1179 - USMC request for SNAP Listing data (CONFIDENTIAL) Margaret, See our respo nses in **red** below to your questions **,** as well as our attached 5/6/11 letter with confidential information redacted. [ ]. Thanks and regards. Nesa Nesa A. Dunn Director of Contracts & Administration GSL, Inc. 4129 S. 72nd E. Ave. Tulsa, Okla homa 74145 USA Toll - Free: 877 - 800 - 1222 Direct: 918 - 551 - 5514 Fax: 918 - 551 - 5515 www.GSL - Inc.com CONFIDENTIALITY NOTICE: The information contained in this communication is confidential and may be privileged. It is intended solely for the addressee. Acce ss to this communication by anyone other than the addressee is unauthorized. If you are not the intended recipient, be advised you have received this in error and any dissemination, forwarding, printing or copying of this correspondence is strictly prohib ited. If you have received this communication in error, please delete it and immediately notify the sender.

----- Original Message ----- From: Sheppard.Margaret@epamail.epa.gov [mailto:Sheppard.Margaret@epamail.epa.gov] Sent: Friday, May 20, 2011 2:1 5 PM To: Nesa Dunn Cc: Maranion.Bella@epamail.epa.gov; Mitchael C. Freeman; Jutras.Nathaniel@epamail.epa.gov; Fiffer.Melissa@epamail.epa.gov; Mukhi, Neha; MWagner@icfi.com Subject: RE: Firebane 1179 - USMC request for SNAP Listing data (CONFIDENTIAL) Nes a,Thank you for your letter dated May 6, 2011. You provided us with much useful information.

I still have a few questions that need to be answered before we can perform our risk assessment. Please clarify the following: 1) Background section, p. 2: What are the approximate dimensions of the crew compartment? Is that roughly 2.0 m high x 1.5 m wide x 1.5 m long? And does that correspond only to the middle section with four seats, as depicted in Fig. 1? **ANSWER:** 2) Alternative - Specific inform ation, p. 3 For the classes of fires, please clarify if you mean all of the following classes: Class A - ordinary combustibles (paper, wood, etc) -- tires mentioned by example Class B - flammable liquids or gases -- petrol mentioned by example Class C - electrical fires Class D - metal fires -- molten metal mentioned by example Class K - cooking oil fires **ANSWER:** 3) Installation, Maintenance, and Use p. 6 What is the rate of airflow in the spaces where the fire extinguisher be used --- that is, ventilation in the crew compartment in cfm or in air changes per hour? **ANSWER:** FYI, our risk assessment modeling will consider the settling rate [ to address the condensation you mentioned in your response ]. The mod eling will also look at what proportion could still be inhaled. Finally, please send us a copy of your letter with confidential information removed.That will give us the final information we need. Thank you for your follow up and for giving us th e

information we need to complete our review. Sincerely, Margaret Sheppard Environmental Scientist Significant New Alternatives Policy Program USEPA/Stratospheric Protection Division Tel. 202 - 343 - 9163 Fax 202 - 343 - 2338 email: sheppard.margaret@epa.gov