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Home My WebLink About2021.02.17_CCO_DEQUpset,SpillorBypass5-DayReportingForm-NC0089915North Carolina Department of Environment and Natural Resources Spill/Bypass Reporting Form (August 2014) WWTP Upset, Spill, or Bypass 5-Day Reporting Form (Please Print or Type Use Attachments if Needed) Permittee: __The Chemours Company_________ Permit Number: __NC0089915__ Facility Name: __Fayetteville Works____________ County: ___Bladen____________ Incident Started: Date: __2/14/21_____ Time: ___1300_____ Incident Ended: Date: __2/17/21_____ Time: ___1300_____ Level of Treatment: _x__None ___Primary Treatment ___Secondary Treatment ___Chlorination/Disinfection Only Estimated Volume of Spill/Bypass: 1,670,163 gallons_______(must be given even if it is a rough estimate) This was calculated by subtracting the daily average intake from 610 gpm and converting to gallons/day for each day below 610 gpm Example: 610 gpm – 530 gpm = 80 gpm; 80gpm x 1440min/day = 114,930 gpd Did the Spill/Bypass reach the Surface Waters? _x__Yes ___No If yes, please list the following: Volume Reaching Surface Waters: 1,670,163 gal Surface Water Name: Cape Fear River_________ Did the Spill/Bypass result in a Fish Kill? ____Yes __x__No Was WWTP compliant with permit requirements? __Yes __x__No Were samples taken during event? ____Yes _x__No Source of the Upset/Spill/Bypass (Location or Treatment Unit): Outfall 003 WWTP Cause or Reason for the Upset/Spill/Bypass: See Attachment 1 Describe the Repairs Made or Actions Taken: See Attachment 1 WWTP Upset, Spill, or Bypass 5-Day Reporting Form Page 2 Spill/Bypass Reporting Form (August 2014) Action Taken to Contain Spill, Clean Up and Remediate the Site (if applicable): There was no spill and no clean up or remediation was or is required. The WWTP was able treat at reduced flow conditions while filter replacements and cleaning activities were ongoing. Action Taken or Proposed to be Taken to Prevent Occurrences: The sludge dewatering system is being brought online with a training period for operation staff. Bringing the dewatering system online will reduce the amount of stored sludge onsite and reduce the potential for sludge carryover to the filters from the wastewater recovery system. Additionally, another UF500 capable of handling TSS and turbidity roughly an order of magnitude higher than the current MPAK80 can manage is being brought on site for deployment soon. Additional Comments About the Event: 24-Hour Report Made To: Division of Water Resources __x__ Emergency Management ____ Contact Name: Mark Brantley, Trent Allen, Julie Grzyb Date: 2/15/2021 Time:1232 Other Agencies Notified (Health Dept, etc): _______________________________ Person Reporting Event: _Dianne Fields_______________ Phone Number: _910-678-1324_______ Did DWR Request an Additional Written Report? ___Yes _x__No If Yes, What Additional Information is Needed: ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ WWTP Upset, Spill, or Bypass 5-Day Reporting Form Page 2 Spill/Bypass Reporting Form (August 2014) Attachment 1 Cause or Reason for the Upset/Spill/Bypass: The WWTP’s filtration system limited flow through the system, causing the average daily flow rate to drop below 610 gpm (the maximum dry weather flow) during a wet weather period. High solids were being carried over from the wastewater recovery system and blended with the raw creek water in the headworks of the WWTP prior to the filters. This solids carryover was fouling the filters, which increased prior to the reduced flow condition. A main contributing factor identified for the reduced flow was that the temporary storage tanks accepting the WWTP’s sludge became full and the sludge was not fully settling prior to returning decant water to the plant headworks. Other contributing factors that are being investigated include:1) work associated with the dewatering system that may have led to polymer carryover and 2) carbon fines from a recent carbon exchange may have reached the filters. Each of these are being explored as potentially accelerating the filter fouling rate. Describe the Repairs Made or Actions Taken: 1. Due to the high pressure loss in the filters, prior to them limiting flow in the WWTP, the filters were cleaned and filter train 1 of 3 had new filter modules installed. The filters continued to experience fouling from a high solids load in the filter’s feedwater. 2. The WWTP’s sludge was being directed to the temporary storage tanks to reduce solids carryover because the sludge dewatering system was not fully operable. Sludge transfer from temporary storage tanks was initiated to remove accumulated solids from the WWTP site on Wednesday, February 17, 2021. 3. Once the WWTP was in reduced flow conditions, the filters were extensively cleaned. 4. Filter train 2 of 3 was found to be non-recoverable with mechanical and chemical cleanings and filtration modules were replaced. 5. Tanks in the WW recovery and the headworks of the plant were cleaned of sludge and suspended solids. 6. The sludge dewatering system was brought on-line in batch mode as of February 18 and has begun to produce batches of dewatered solids. The Suez team is working now to have the solids dewatering system perform on a continuous basis, as needed. WWTP staff are being trained to operate the sludge dewatering system.