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Baker, Lydia [EHD] From: Farhad, Mohammad@Waterboards <Mohammad.Farhad@waterboards.ca.gov > Sent: Monday, February 1, 2021 1:40 PM To: Aloke Vaid Cc: Baker, Lydia [EHD]; Ku!deep Sharma Subject: Re: Emergency Pond Grab Data CAUTION: This email is originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hello Aloke, As per our conversation, this morning regarding the spill incident which made it to the emergency storage basin. The emergency storage basin is used to divert effluent when the Facility is under routine maintenance and or during emergency incidents. The wastewater is held in the emergency storage basin until the Facility slowly returns water back to the treatment system. As described during our conversation the spill made it to the Facility's stormwater drain which discharges to the emergency storage basin. Please report the incident in the eSMR cover letter indicating the actions that have been implemented, or will be implemented, to address the incident and to prevent future similar events. Please let me know if you have any questions. Thank you, -Mohammad From: Aloke Vaid <aloke.vaid@cityoftracy.org > Sent: Friday, January 29, 2021 6:38 AM To: Farhad, Mohammad@Waterboards <Mohammad.Farhad@waterboards.ca.gov> Cc: Baker, Lydia [EHD] <lbaker@sjgov.org >; Kuldeep Sharma <Kuldeep.Sharma@cityoftracy.org> Subject: FW: Emergency Pond Grab Data EXTERNAL: Good Morning Mr Farhad, To summarize, there was a spill of Liquid Ammonia on the 1/26 when a small diameter piping broke, spilling some 2400 lbs of Ammonia on the ground. The incident was reported to CUPA, NRC and the Regional Water Quality Control Board; the leak was stopped the minute it was discovered; the Liquid Ammonia has been contained, no clean up was necessary; on account of the rain, some Ammonia is expected to have been washed out to the emergency storage pond. Lydia Baker and Haza Saeed, the San Joaquin County Environmental Health Specialists, did a site inspection. The spilt Ammonia hadc, because of the rain, made its way to the Emergency Storage Pond, as it is supposed to do and contain the spill, along with the surface run off, as a part of the storm water system. As a reminder: the water from the emergency storage pond cannot be discharged to the receiving river, and is returned to the aeration basins to properly treat the water along with the normal influent. The Current Situation: A Notice to Abate has been issued by the San Joaquin County to stop any discharge from the storage pond. I have been in touch with Ms Lydia Baker to lift the stop order on the emergency storage pond return. 1