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Complaint Investigation Summary Report #: 5105 COMPLAINT ID: C00054088 Site Location: 8095 RIO BLANCO RD Received by: EE0000036 SAHOTA Received Date: 7/20/2021 Complaint Received Via: PHONE Assigned To: EE0003973 MCCLELLON Assigned Date: 7/20/2021 Propram/Element Code 4600 - PUBLIC WATER SYSTEM PROGRAM Nature of complaint: WATER IS MUDDY BROWN, AND HAS BEEN FOR A FEW DAYS NOW PROPERTY INFORMATION Facility: F40002759 - PARADISE POINT MARINA Site Location Cross Street 8095 RIO BLANCO RD STOCKTON, CA 95219 RIO BLANCO District 004 - WINN, CHARLES Location Code 01 - STOCKTON APN 06605052 Complaint Status: 0 2-- of-CI CC- eircipi.se Date Abated:i I / Z2. Abated By: M SMAUTA Activity Summary Activity Date Recorded by 07/20/2021 Received call regarding complaint of muddy brown water. The complainant stated SAHOTA the water has been brown for a few days, but no other issues noted. I explained the treatment system and possible issues with the water table or pressure, and stated I would follow up with them once I gathered more information. 07/22/2021 Reached out to Angelina (Quality Service) to see if there is any information on the SAHOTA treatment system for the complaint. I reviewed the monitoring results, and recent monthly treatment report. 07/26/2021 Angelina (Quality Service) stated the system is still bypassing treatment and reviewing an estimate for the media. She stated Kris at the site is not aware of the issue and he is reviewing the estimate. I let her know I would double check and get back to her with anything we may need at this point in time. 08/13/2021 Follow up on permit for water system, and reviewed iron and manganese data in July monthly treatment report (submitted August 10th). Iron exceeded the Maximum Contaminant Level (MCL) in the distribution system, although post filtration results were slightly below the MCL. Manganese exceeded the MCL in all sample points. Assessed public notification templates for the notice that is appropriate for this situation. Sent direction to Quality Service to post a mixture of the "Chemical MCL Exceedance" and "Do Not Drink" notices. I also informed them that the notice would need to be posted in a conspicuous place and distributed to any residents, when approved. I sent a reminder of the permit condition that requires the treatment system to be removed or placed with a working treatment system if iron or manganese exceeds the maximum level by three times. Since the report stated new media is in process, I stated we would need an estimated timeline on when the media exchange would be completed. I let them know the notification would have to remain in place until media exchange is complete, and field test results indicate iron and manganese are below the MCL. Angelina (Quality Service) stated she would work with Alan and Joe to put together a notice on Monday. SAHOTA SAHOTA 08/19/2021 Alan (Quality Service) provided public notification and proof of notification copies. SAHOTA He stated he would check back in regarding the new media when he had new information. 5105. rpt Page 1 of 2