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HomeMy WebLinkAboutNC0000272_Performance Summary_20220331pactiv evergreen March 31, 2022 175 Main Street Canton, NC 28716 828.646.2000 pactivevergreen.com CBC 20-22 CERTIFIED MAIL RETURN RECEIPT REQUESTED 7018 2290 0001 7880 9972 North Carolina Department of Environmental Quality Division of Water Resources ATTENTION: Central Files 1611 Mail Service Center Raleigh, NC 27699-1611 Re: NPDES NO. NC0000272 Best Management Practices 2021 Annual Report Blue Ridge Paper Products LLC d/b/a Evergreen Packaging Canton, NC This letter report (two copies) is the 2021 summary of Best Management Practices (BMP) daily monitoring for the Canton Mill. The report is required on or before March 31 st of each year by Special Condition A(6.) Best Management Practices, Section E.4 and Section F.1, of the mill's NPDES Permit No. NC0000272. The BMP action levels established in accordance with permit requirements and in effect for 2021 are as follows: Effective Dates: 1 Jan 2021— 31 Dec 2021 Action Level Total Influent (TI) Color — daily monitoring result Action Required 1-Day Upper Action Level (UAL) > 72,500 lbs/day for one day Immediate investigation and documented corrective action 2-day Upper Action Level (UAL) > 59,400 lbs/day for two consecutive days Investigation and documented corrective action 2-day Lower Action Level (LAL) > 55,400 lbs/day for two consecutive days Investigation and documentation Daily records of total influent color are maintained at the mill. These daily color data are compared to BMP action levels every morning. Total influent color exceeded BMP action levels on the dates outlined in the following table. A brief summary of information for these dates are included as required by permit Condition A.(6.), Section E.4. The permit -required BMP investigation reports are maintained at the mill. The Canton Mill met all NPDES color permit limits during 2021. Date(s) Total Influent (TI) Color Action Level and Summary 17 — 18 February 79,946 lbs/day 1-day UAL / 2-day UAL — Immediate investigation 2021 77,294 lbs/day and documented corrective action Cause(s) During normal operation on 2/17/2021, a tube leak developed on #15 digester black liquor heater, causing black liquor to enter the sewer. Additionally, a black liquor mixture was found going to the sewer. Corrective Action(s) The digester liquor heater valve was taken out of service for repairs. To terminate the sewering, the valves around the drain were closed and black liquor valves at the tie in points along the black liquor/mill water lines were reseated to determine if black liquor was still leaking into the water. Proactive, frequent checks of area sewers and sump pumps occurred to detect any other color losses when indicated. This was a two-day event based on the timing of the beginning and end of the event. There were no NPDES discharge limit color exceedances due to this event. 18 — 19 March 97,660 lbs/day 1-day UAL/ 2-day UAL— Immediate investigation 2021 79,817 lbs/day and documented corrective action Cause(s) In preparation for a planned cyclone wash, operators were filling recovery boiler cyclones with condensate when a crossover valve near the feed pump failed and the cyclone filled with heavy black liquor that ran over to the sewers. Corrective Action(s) The valve was identified and repairs were made immediately. The high color material was captured in a spare clarifier and was chemically treated in the WTP. This was a two-day event based on the timing of the beginning and end of the event. There were no NPDES discharge limit color exceedances due to this event. Date(s) Total Influent (TI) Color Action Level and Summary 20 — 22 March 78,474 lbs/day 1-day UAL / 2-day UAL — Immediate investigation 2021 87,404 lbs/day and documented corrective action 84,380 lbs/day Cause(s) Power failure caused a loss of control of the black liquor containment sumps, which subsequently overflowed to the sewer. Corrective Action(s) Repairs were made as soon as practicable, the equipment was restarted, and normal operations continued. The high color material was captured in a spare clarifier and was chemically treated in the WTP. This event spanned multiple days based on the timing of the beginning and end of the event. There were no NPDES discharge limit color exceedances due to this event. 24 — 25 March 82,234 lbs/day 1-day UAL / 2-day UAL — Immediate investigation 2021 55,737 lbs/day and documented corrective action Cause(s) The packing of the hardwood weak black liquor tank pump was found to be leaking and the hardwood brown knotter catch basin was partially plugged, causing color material to run around the containment. Additionally, 11 hours of pine screen downtime and a 3-hour power outage occurred. Corrective Action(s) The pump was re -packed, the packing water was adjusted, and the partially plugged sump was cleared as soon as practicable. The high color material was chemically treated in the WTP. This event spanned multiple days based on the timing of the beginning and end of the event. There were no NPDES discharge limit color exceedances due to this event. Date(s) Total Influent (TI) Color Action Level and Summary 27 March 2021 129,151 lbs/day 1-day UAL — Immediate investigation and documented corrective action Cause(s) A leak in a soap transfer pump packing, created an unplanned color diversion to the sewer. Corrective Action(s) Upon discovery of the packing leak, the pump was taken out of service. The pump was re -packed on 3/29/2021. The residual soap was washed up to #11 Recovery Boiler sump, following inspection to ensure it was working properly, and was processed through the wash water tank by the evaporators. Color material was captured in a spare clarifier and was chemically treated in the WTP. There were no NPDES discharge limit color exceedances due to this event. 4 April 2021 152,930 lbs/day 1-day UAL — Immediate investigation and documented corrective action Cause(s) Color unexpectedly became elevated on 4/4/2021, and upon investigation, the wash water tank was found to be leaking. Black liquor reached the sewer. Corrective Action(s) The level in the tank was pulled below the location of the leak and maintained until repairs could be made on 4/8/2021. The liquor was captured in a spare clarifier and treated in the WTP. There were no NPDES discharge limit color exceedances due to this event. Date(s) Total Influent (TI) Color Action Level and Summary 5 April 2021 77,105 lbs/day 2-day UAL — Investigation and documented corrective action Cause(s) While boiling out the West GB evaporator set following a mill -wide power failure on 4/3/2021, the sumps filled with low conductivity material. The evaporator set required a longer wash time than usual and the sumps could not contain all of the color material and some was discharged to the sewer. Corrective Action(s) The color material was captured in a spare clarifier and treated in the WTP. There were no NPDES discharge limit color exceedances due to this event. 21 — 23 August 114,937 lbs/day 1-day UAL / 2-day UAL — Immediate investigation 2021 77,390 lbs/day and documented corrective action 64,294 lbs/day Cause(s) Due to significant flooding on 8/17/2021, the mill was forced to shut down. When attempting to start up around 23:00 on 8/20/2021, the pump packing retaining ring began to leak, causing black liquor to enter the U- drains. During other start-up events on 8/22/2021 and 8/23, the evaporators became air locked, causing black liquor to be released to the sewer. Corrective Action(s) The east heavy black liquor pump was taken out of service until the packing ring and retainer could be repaired. The high color material on all 3 days was received by the WTP and treated. This event spanned multiple days based on the timing of the beginning and end of the event. There were no NPDES discharge limit color exceedances due to this event. Date(s) Total Influent (TI) Color Action Level and Summary 15 — 16 82,645 lbs/day 1-day UAL / 2-day UAL — Immediate investigation September 2021 86,469 lbs/day and documented corrective action Cause(s) East knotter feed pump was leaking black liquor to the sewer. Cleaning of a separate compound contributed additional color. Corrective Action(s) The east heavy black liquor compound valves were closed. Repairs were planned for the east knotter feed pump. The material was captured and treated in the WTP. This event spanned two days before repairs could be made to mitigate the elevated color. There were no NPDES discharge limit color exceedances due to this event. 21 — 23 58,390 lbs/day 1-day UAL / 2-day UAL — Immediate investigation September 2021 84,476 lbs/day and documented corrective action 75,172 lbs/day Cause(s) The pine fiberline experienced a filtrate (weak black liquor) imbalance that caused a higher -than -normal filtrate loss to the sewer. Corrective Action(s) The filtrate imbalance was stabilized and the color diminished. The high color material on all 3 days was received by the WTP and treated. There were no NPDES discharge limit color exceedances due to this event. Date(s) Total Influent (TI) Color Action Level and Summary 11 — 12 October 73,086 lbs/day 1-day UAL / 2-day UAL — Immediate investigation 2021 100,661 lbs/day and documented corrective action Cause(s) Multiple activities during shutdown for the #10 Recovery Boiler/Hardwood fiberline outage impacted color levels. Pulp Mill: on 10/10/2021, the hardwood 2nd stage filtrate tank was emptied. WTP personnel added color reduction polymer in order to offset known potential color to the sewers. On 10/11/2021, there were multiple tanks emptied in preparation for the outage, with some material collection in the east hardwood secondary knotter sump. Recovery: In preparation for the outage, the liquor system, cyclones, dissolving tank, and boiler were being washed out. Some losses occurred from the liquor system and cyclones. The dissolving tank did not contain black liquor specifically, but the washed out material did contain some color and turbidity. Following shutdown procedure, the Swenson evaporator set was boiled out and operators turned the product liquor to the sewer at 5% solids, notifying the WTP. Some soap got to the sewer, but the pump was shut off when discovered. Corrective Action(s) Communication with the WTP to ensure the material was captured and treated throughout the remainder of the shutdown procedures/outage. Material was treated in the WTP. There were no NPDES discharge limit color exceedances due to this event. Date(s) Total Influent (TI) Color Action Level and Summary 18 — 19 October 111,436 lbs/day 1-day UAL / 2-day UAL — Immediate investigation 2021 93,978 lbs/day and documented corrective action Cause(s) Multiple activities during startup from the #10 Recovery Boiler/Hardwood fiberline annual outage impacted color levels. Pulp Mill: during start-up from the outage, there was higher than usual filtrate loss to the sewers in areas inaccessible to the sumps, impacting sewer color. Recovery: when starting up from the outage, the Swenson evaporator set outpaced the sump and some black liquor was sent to the sewers. Corrective Action(s) Communication with the WTP to ensure the material was captured and treated throughout start-up from the outage. Material was treated in the WTP. There were no NPDES discharge limit color exceedances due to this event. 22 — 23 October 70,363 lbs/day 1-day UAL / 2-day UAL — Immediate investigation 2021 60,868 lbs/day and documented corrective action Cause(s) During start-up from the annual hardwood fiberline outage, there were higher than usual color samples gathered at the 2B sewer sampler. The cause was determined to be the result of upset conditions during start-up. Corrective Action(s) Communication with the WTP to ensure the material was captured and treated throughout start-up from the outage. Material was treated in the WTP. There were no NPDES discharge limit color exceedances due to this event. Date(s) Total Influent (TI) Color Action Level and Summary 26 October 2021 75,944 lbs/day 1-day UAL — Immediate investigation and documented corrective action Cause(s) East heavy black liquor storage north pump was taken out of service to repack. During the lock -out tag -out procedure, the suction valve would not hold, causing a loss of black liquor into the compound. The level rose and to protect the equipment and the safety of the operators, the drain was opened to the compound. Corrective Action(s) When the level of black liquor was down to a safe amount, the drain was closed. The material was vacuumed out and discharged to the #11 Recovery Boiler sump pump. Repairs were made following the relocation of the material. The color material was treated in the WTP. There were no NPDES discharge limit color exceedances due to this event. 23 — 24 34,959 lbs/day Soap Loss — Immediate investigation and November 2021 33,237 lbs/day documented corrective action Cause(s) Multiple factors were investigated as potential causes for the loss of soap to the sewer, such as mechanical components, system processes, communication/warning systems, and operator actions/responses, but the most likely causes were 1. discharge from the tall -oil -making process area and 2. overflow from the pine weak liquor storage tank. Corrective Action(s) The soap was treated by the WTP. However, in an attempt to prevent future soap excursions, the following corrective actions were identified and are in the process of/have been implemented in the mill: • Briefings/communications with operators to emphasize the importance of containing soap in mill processes/avoiding discharge to WTP; • Updating BMP training (on -going); • Inspection of spent liquor, turpentine and soap containments, conductivity sensors, and level Date(s) Total Influent (TI) Color Action Level and Summary transmitters were all inspected to ensure functionality; • Communication of data collected from the overflow alarm on the pine weak liquor tank, an indication of possible soap discharge from the tank, was modified to display in a second location for increased visibility, along with a text -enabled alarm; • Installation of surveillance camera equipment/monitoring of visible feed by operators; • Additional containment to capture possible soap overflows was provided by construction of a 4- foot containment wall with a drain valve. Three daily maximum and one monthly average BOD5 permit limit exceedances were recorded during this event. 18 — 20 61,543 lbs/day 2-day UAL — Investigation and documented December 2021 64,784 lbs/day corrective action 57,167 lbs/day Cause(s) The solution transfer pump in the Chloride Removal Process (CRP) was shut down due to pump failure. At the time, the Recovery area began sending dark filtrate from the CRP system to the sewer since CRP was down. Following replacement of the pump on 12/20, it was found the discharge line was plugged on startup. During this time, dark filtrate was still flowing to the sewer, elevating color. Investigation revealed that the cause of the elevated color was filtrate. Corrective Action(s) The solution transfer pump was replaced on 12/20/2021, but plugged upon start up. The plugged line was cleared and color dropped. The color material was treated in WTP. There were no NPDES discharge limit color exceedances due to this event. 23 December 2021 84,689 lbs/day 1-day UAL — Immediate investigation and documented corrective action Cause(s) The Pine Primary Knotter began flushing at 05:56. The operator attempted to pull back on the load from the blow tower and cut knotter dilution to decrease the pressure; this proceeded to cause the secondary knotter accepts tank to overflow. A manual flush of the secondary knotter was completed and when checking the purge from the A and B valves, the B valve was found partially open, causing black liquor to flow out. The black liquor was flowing into a U-drain that lead to the east sump. However, the sump was not pumping. The level was high and rich with content from the secondary knotter accepts tank. Pulp had accumulated in the sump, filling it up. Corrective Action(s) When the issue was first identified, the operator attempted to pull back load from the blow tower and cut back on knotter dilution to decrease pressure and stop the flushing. This caused the secondary knotter accepts tank to overflow, so the operator then tried to increase rejects from primary screen in an attempt to flush the primary knotter. The crew leader performed a manual flush of the secondary knotter to prevent plugging. Once completed, the crew leader went to check purge through the A and B valves and identified the leak. Upon identifying the leak, the operator went through the TCC to try bringing load back on. The A and B valve area was flushed two more times, and the B valve finally closed. Once this was closed, a round was made to determine where the black liquor was flowing to. When it was discovered that the east sump, where the color material was accumulating, was not pumping, it was flushed and the pump was switched to manual. The pump was primed and all of the material was placed in a spill containment area. Once the load was increased, the secondary knotter accepts tank stopped overflowing and the issue was resolved. The material was treated in the WTP. There were no Date(s) Total Influent (TI) Color Action Level and Summary NPDES discharge limit color exceedances due to this event. Please contact us if you have questions regarding this information. Sincerely, Tracy' Willis WWTP ORC Canton Mill tracy.willis@pactivevergreen.com Phone: 828-492-9955 cc: John McCarthy General Manager Canton Mill john.mccarthy@pactivevergreen.com Phone: 828-492-6189 Mr. Landon Davidson DWR Regional Supervisor, Asheville Regional Office North Carolina Department of Environmental Quality 2090 U.S. Highway 70 Swannanoa, NC 28778 Certified Mail 7018 2290 0001 7880 9989 C. File — 405 — Wastewater