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Alaniz, John From: Alex Reynon <Alex.Reynon@tchem.com> Sent: Monday,July 22, 2019 5:34 PM To: Bazley, Greg Cc: Ryan Hiatt;Alaniz, John Subject: RE: Worst Case Scenario (WCS) and RMP Contact Info Attachments: RMP Changeover Docs 07-16-19.pdf Good Afternoon Mr. Bazley, Ryan Hiatt updated the chlorine scenarios today via the EPA's RMP*COMP ( https://cdxnodengn.epa.gov/cdx-rmp- maintain/action/rmp-comp/toxicGas );the radius and the population are ready but needs to review the details of ALOHA (e.g. hospitals, parks, prisons)with our corporate specialist. In addition,the RMP was submitted for the contact information change (see attached pdf) early last week. As this is an inspection in relation to previous ownership, please advise on any additional information you would like to review on Thursday(e.g. specific corrective actions Sierra was to address); I would like to make your time spent at the facility as productive and efficient as possible. Thank you for your time, Alexander Reynon Thatcher Company,Inc. Plant Manager Stockton,CA Cell:209-471-5815 Office:209-983-8298 �Ilr��r From: Bazley, Greg<Bazley.Greg@epa.gov> Sent: Monday,July 22, 2019 9:48 AM To:Alex Reynon <Alex.Reynon @tchem.com> Cc: Ryan Hiatt<Ryan.Hiatt@tchem.com>; Alaniz,John <jalanizl@sjgov.org> Subject:Worst Case Scenario (WCS) and RMP Contact Info Good morning Alex, In reviewing your facility's worst case scenario (WCS) for chlorine I noticed the model used is from the Chlorine Institute Pamphlet 74 Edition 6. On September 12, 2017, the Chlorine Institute issued a memo suspending the use of Pamphlet 74 due to unacceptable modeling methodology and resulting short distance to endpoint.The memo is attached. Please reevaluate your WCS and we can discuss further on Thursday. I would also encourage updating contact information within your RMP which is no longer accurate. Thanks, i