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July 29, 2019 Rick J. Justice Page 2 The water in the parking lot was contained by the facility's Safe Drain system. The purpose of the Safe Drain system is to seal the storm drain in case of a spill. Upon my arrival at 10:25 pm, I began efforts to further contain the water and mitigate additional water flow. I then checked the water that had pooled in the parking lot. I tested the pH of the water (which was neutral) and visually inspected the water confirming there was no discoloration and no visible sheen. After taking these steps, I opened the Safe Drain allowing the water to go into the storm drain. The following day on July 16`h at approximately 10:19 am, I placed a call to the San Joaquin County Health Department (209-468 3420) and City of Stockton Wastewater Control Authority (209 937 8341) to provide notification of this incident. As explained in our prior letters, based on visual inspection, pH testing, and knowledge of the source of the water, there was no indication the water contained hazardous materials. Although we did not believe this incident was reportable, we provided notification in an abundance of caution. We determined the malfunctioning sump pump was due to a blockage in the suction intake of the pump. The blockage was cleared and we proceeded to clean-up the remaining water contained in the wastewater building. There was no direct discharge of water to the sanitary sewer. All water was directed to the pretreatment system for normal processing and treatment prior to discharge to the sanitary sewer. We have instituted corrective actions with the maintenance team to perform daily inspections of the sump pumping system to prevent reoccurrence of this issue. We have also reviewed procedures with the maintenance team to verify that water hoses are turned off and are not left unattended. I have enclosed a copy of our spill/slug control plan which also provides the contact telephone numbers in the event of an emergency. If you have any questions, please feel free to contact me. Thank you. Sincerely, Anthony Browny/ Maintenance Manager Enclos. cc (via email): Richard Stiffler, City of Stockton, Municipal Utilities Garrett Backus, San Joaquin County Environmental Health Department Stephanie Walter, Aramark Brett Borba, Aramark Vaughn Austin, Aramark Robert Dye, Aramark