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HomeMy WebLinkAboutWQ0029804_Annual Report_20200827 Winston-Salem/Forsyth County 41„, Utilities Water•Wastewater•Solid Waste Administration,P.O.Box 2511,Winston-Salem,NC 27102 0:336-727-8000, F:336-727-8432,wsfcutilities.org August 27, 2020 Mr.Jeff Poupart, Supervisor North Carolina Department of Environmental Quality RECEIVED PERCS Unit 1617 Mail Service Center AUG 2 8 2020 Raleigh, North Carolina 27699-1617 NCDE(IDWRQDES Re: 2019-2020 System Performance Report Winston-Salem/Forsyth County Utilities Dear Mr. Poupart, Attached are the original and two copies of the annual performance report for Winston-Salem/Forsyth County Utilities wastewater collection and treatment system as mandated by the North Carolina Clean Water Act of 1999. This report covers the period from July 1, 2019, through June 30, 2020. This report was made available to the public by publishing a "Notice of Availability" in the Wednesday, August 26, 2020, Winston-Salem Journal and a notice is being included in each of our water and sewer bills informing our customers as to how they can obtain a copy of the report. A copy of the advertisement and the "Affidavit of Publication" of the notice are also attached. In addition, the report is being posted on our website and a copy made available at the Forsyth County Public Library. Please call me at 336-747-7315 if you have any questions. Sincerely, COli/*)() Courtney L. Driver, P.E. Utilities Director PC: Corey Basinger, WSRO Frank Crump, Wastewater Treatment Superintendent Cn J oine s;Vivian . ke,M ,Northeast Wde D. , Wrds ,Stwd Robert C.Clark, WestityCouncil:Ward;JohnMayor C.Larson,Alle South Ward;HJeBurff Macintoshayor Pro,NorthwestTempore Ward;Annette Scippar;Dio,Eastnise Ward;Adams JamesNorth Tayloar,Jr.;Dan,SoutheastBese Ward;ouh Cityest W Maarn;ager:Lee D.Garrity County Commissioners:David R.Plyler,Chair;Don Martin,Vice Chair;Fleming El-Amin;Ted Kaplan;Richard V.Linville;Tonya McDaniel;Gloria D.Whisenhunt;County Manager:Dudley Watts,Jr. Call 311 or 336-727-8000 Winston-Salem/Forsyth County Utility Commission:Randall S.Tuttle,Chair;L.Wesley Curtis,Jr.,Vice Chair;Harold E.Day;Tom Griffin;Yvonne H.Hines;Duane Long; citylink@cityofws.org Hugh W.Jernigan;Chris Parker;lames Ruffin;Donald R.Stewart;Allan Younger Winston-Salem/Forsyth County Utilities Wastewater Collection and Treatment System Performance Report for FY2019-2020 This report is published in accordance with the requirements of the North Carolina Clean Water Act of 1999 and provides information on the Publicly Operated Treatment Works (POTW) and Collection System operated by Winston-Salem/Forsyth County Utilities. It covers the period from July 1, 2019 through June 30, 2020. This report is published and released to our customers annually. Winston-Salem/Forsyth County Utilities (Utilities) operates two wastewater treatment plants (WWTPs) with a combined treatment capacity of 51 million gallons per day. The wastewater collection system includes approximately 1,780 miles of sewer lines,49 pumping stations,and one chemical odor control station. During the period covered by this report a total of 13.370 billion gallons of wastewater was collected and treated at these facilities. Utilities staff work hard to meet or exceed the requirements mandated by the North Carolina Clean Water Act and the requirements of the National Pollutant Discharge Elimination System(NPDES)permits that regulate the actual operation of the treatment plants,the disposal of our biosolids, and the operation and maintenance of our collection system. The wastewater collection system operates under NPDES permit WQCS00003. The Archie Elledge WWTP operates under NPDES Permit NC0037834 and the Muddy Creek WWTP operates under NPDES permit NC0050342. The treatment and disposal of residual biosolids produced by the plants is accomplished by anaerobic digestion followed by processing in a biosolids drying facility at the Archie Elledge WWTP under Permit WQ0029804. The biosolids dryer facility produced 7,122.63 dry tons of pelletized biosolids during FY2019-2020 which were beneficially applied to farmland. The water system has three additional NPDES permits, one associated with each water treatment plant. The Swarm Water Treatment Plant (WTP) operates under General Permit NCG590003, the Thomas WTP under NPDES Permit NC0079821 and the Neilson Plant under permit NC0086011. All three water plant permits operated within compliance of their permit conditions during this performance period. The treatment process at the water treatment plants generates a Class-A residual that is land applied under Permit WQ0031314. During this compliance period,a total of 885.11 dry tons of residuals were hauled from the Neilson WTP and applied on farmland in Davidson County. A total of 479.14 wet tons were hauled from the Thomas WTP to Hanes Mill Road Landfill. Archie Elledge WWTP and the Biosolids Dryer Facility reported no violations of their permit limits during the reporting period. Muddy Creek WWTP had one permit violation as shown in Appendix A. The two wastewater treatment plants met the minimum requirements imposed by the State of North Carolina's Division of Water Resources by a safety factor of 3.75. The bar chart in Appendix B shows the performance of the wastewater treatment plants during this period. Approximately 34,333 tons of regulated pollutants were removed by the treatment processes during the period ending June 30, 2020. The remainder of this document includes details about monitoring system discharges and overflows from our wastewater collection system and preventative maintenance programs established to prevent potential problems. Utilities' goal is to have zero sanitary sewer overflows (SSO) from the wastewater collection system. However, during the last fiscal year, 77 events totaling 0.00323% of the wastewater collected was spilled/overflowed from the sanitary sewer system. This is a combined total of 54 reportable and 23 non-reportable spills. Appendix A and D of this report lists a detailed summary of plant and collection system overflows reported in FY2019-2020. Since the passage of the North Carolina Clean Water Act in 1999 the total annual SSOs have been tracked against the baseline year of FY1998-1999 (Appendix C). Diligence by maintenance personnel toward preventative maintenance continued to be a major factor contributing to SSOs remaining at a lower level than that of the baseline year. In fact, FY2019-2020 has resulted in one of the lowest reported SSO years(77)since reporting began in 1999. Our success in reducing SSOs also includes the incorporative use of Geographic Information Systems (GIS) with our computer maintenance management system, Cityworks. Together, GIS and Cityworks can display historical work order information which allows our crews to respond to areas where issues have repeatedly occurred. Management also uses this same data to help develop future capital projects to alleviate the cause of repeat issues. In 2019, Utilities staff attended the NC-AWWA-WEA Collections/Distribution System Schools where staff obtained three levels of certification in wastewater collections. Utilities is in the midst of a Collection System Improvement Program, which helps prioritize and schedule our collection system preventative maintenance measures based on physical inspections from the field. Inspections ranging from routine cleaning to closed circuit television (CCTV) are tracked in the City of Winston-Salem's computerized maintenance management system; Cityworks. In an effort to collect more uniform data and to make crews more efficient, we have also upgraded both of our CCTV camera systems to WinCan, which integrates with Cityworks. Essentially all of the information that we collect from the field is seamlessly entered into our preventative maintenance scheduler tool (COTools)and a decision making process is streamlined for cleaning, rehabilitation and/or replacement of our collection system infrastructure. By having these new systems in place,our field personnel can identify and submit information directly to the supervisor with a few key strokes. This information also helps CityLink convey issues to the customer in a timelier manner. The major causes of SSO occurrences in FY2019-2020 were attributed to root intrusion, grease deposits and debris accumulation. Because of this, additional funding was approved for FY2020 to provide for more preventative cleaning of the collection system. This effort has reduced the occurrences of SSOs by preemptively targeting areas prone to the three major causes. In FY2019- 2020, Utilities cleaned more than 393 miles, which is 22% of the 1,780 mile gravity wastewater collection system. In-house personnel cleaned 693,580 linear feet of publicly owned/maintained sewer lines and contracted crews cleaned 1,383,360 linear feet at a cost of$1,175,467.50, with an increasing focus on our large diameter sewer mains. Of the 393 miles that were cleaned, 77% or approximately 303 miles were proactively cleaned by in-house and contracted crews.For FY2019- 2020 the goal is to continue to increase the portion of proactive cleaning and to exceed our overall internal goal by cleaning 20% of the entire gravity collection system. In 2003, a Grease Interceptor Ordinance was adopted which regulates the operation and maintenance of residential, commercial and industrial grease trap interceptors. This ordinance alone has been effective in reducing the amount of grease related SSOs since its adoption. In 2003, the total number of SSOs spiked at 269;the following year that number dropped by nearly 30 SSOs and the count of SSOs has made a steady decline since that time. While this ordinance has been effective, further assistance from the public is necessary to completely solve this problem. Over the past year, in-house personnel have conducted outreach via community events and media opportunities in an effort to educate the public on the proper disposal of cooking grease, fats and other oils. In addition, maintenance personnel have been proactively cleaning the publicly maintained portions of sewer connections to keep sewer main lines clean and free of grease as well as tree roots and debris. During FY2019-2020, Utilities continued its proactive efforts toward the reduction of SSOs by spending over $11 million on the rehabilitation of 434,241 feet of gravity sewer mains, 143 manholes, and 125 service laterals. The sewer mains rehabilitated primarily ranged in size from 6"to 42". The mains were rehabilitated by means of pipe bursting, cured-in-place lining of pipes, total replacements, or a combination of any of these methods. The enhanced condition of these sewer mains and manholes provided by the rehabilitation projects not only contributed to the reduction of SSOs but also aided in the reduction of infiltration and inflow by reducing and/or eliminating access points for storm water runoff and groundwater to enter the wastewater collection system. In addition, Utilities performed closed circuit TV inspection of 710,218 linear feet of sewer mains. Staff and contractors also improved access to the collection system through inspection and mowing/clearing of approximately 20 miles of easements. Winston-Salem/Forsyth County Utilities launched its "No Wipes in Pipes" campaign in April 2020. The campaign is an effort to encourage citizens to not flush wipes and other products in the toilet. The campaign includes social posts, English and Spanish fliers, and two informational videos. Several local broadcast news organizations ran news stories about the importance of protecting wastewater systems by not flushing wipes down the toilet. Lastly, staff continued to actively identify and plan for projects in an effort to reduce SSOs and infiltration and inflow into the wastewater collection system.In addition to the benefits of reducing SSO volume and the reduction of water getting into the system, these projects have the added benefit of decreasing the amount of wastewater to be treated, thereby reducing overall operating costs. As always, customer involvement will continue to be a factor in the reduction of SSOs. All customers can do their part in helping to keep the wastewater collection system free of materials that cause blockages by not dumping debris and fats, oils, or grease into the system. To report a wastewater spill, please contact the City of Winston-Salem 24—hour customer service line (CityLink) at (336)727-8000. For questions regarding our programs or additional information regarding this report,please contact Gale Ketteler,Utilities Public Information Officer at(336)747-7414. Copies of this report may be obtained by calling CityLink at(336)727-8000 and requesting a copy. This report is also available at all branches of the Forsyth County Public Library and it is posted on the Utilities Department's website at https://www.cityofws.org/1309/Reports- Policies. Certification of Accuracy: I certify under penalty of law that this report is complete and accurate to the best of my knowledge. I further certify that this report has been made available to all persons or concerns using the publicly owned wastewater collection and treatment facilities under the direction of Winston- Salem/Forsyth County Utilities and that those persons or concerns have been notified as to the availability of this report. COVI 0444.\ Date: 8/25/2020 Courtney L. Driver, P.E. Utilities Director Winston-Salem/Forsyth County Utilities r Appendix A: Wastewater Treatment Plant and Pump Station Overflow/Spill Information Fiscal Year 2019-2020 Number of Number of Volume of NPDES Permit Flow Discharged From Overflow Events Overflows, Violations at Month/Year Treatment Plants, Gallons Reported gallons Treatment Plants July 2019 995,100,000 0 0 0 August 2019 968,130,000 0 0 0 Sept.2019 902,400,000 0 0 0 October 2019 1,035,710,000 0 0 0 November 2019 1,035,300,000 0 0 0 December 2019 1,192,880,000 0 0 0 January 2020 1,274,410,000 0 0 0 February 2020 1,422,160,000 1 400 1 March 2020 1,159,400,000 0 0 0 April2020 1,055,700,000 0 0 0 May 2020 1,279,370,000 0 0 0 June 2020 1,049,400,000 0 0 0 ANNUAL TOTAL 13,369,960,000 1 400 1 Notes: 2/2020—Muddy Creek WWTP had a NPDES permit violation for exceeding the permitted monthly flow of 21 MGD due to excessive amounts of rainfall in the Muddy Creek basin. 2/19/2020—Archie Elledge WWTP had a spill of 400 gal of non-potable water from a hose which slipped out of a tank onto the ground. The spilled water didn't make it into Salem Creek. Appendix B: Wastewater Treatment Efficiency During FY2019-20 I�I 7,4111111 40,000 >r<< <>>> 35,000 30,000 eK 25,000 0 20,000 Tons 15,000 I4 59 10,000 ' ssrix 5,000 immisoiiiiiiKiii:Trin-r1 rrr r i ILI :::**f 11110 ®Tons Regulated Pollutants Received at Treatment Plants inTons Regulated Pollutants Allowed in Discharge by Division of Water Quality Tons Regulated Pollutants Actually Discharged by Treatment Plants Appendix C: Fiscal Year 2019-2020 Performance Summary of Wastewater Collection System sso w/> Total 1000 gal in SSO wh 15,000 Wastewater SSO Total No. Notice of Surface gal in Surface Total SSO Collected** Percentage of Month/Year of SSO's - Violations waters* waters Volume(gal) (gal.) Total July-19 5 0 0 0 98 995,330,000 0.000014% August-19 2 1 0 0 501 968,120,000 0.00052% September-19 9 0 2 0 7,690 887,420,000 0.00087% October-19 6 1 2 1 20,302 1,035,660,000 0.0019% November-19 6 0 1 0 4,590 1,053,000,000 0.00043% December-19 3 1 0 0 852 1,192,880,000 0.000071% January-20 7 0 0 0 935 1,274,820,000 0.000073% February-20 15 3 3 3 107,685 1,422,190,000 0.0075% March-20 6 1 1 1 52,957 1,159,360,000 0.0045% April-20 9 1 0 0 3,399 1,055,570,000 0.00032% May-20 2 2 2 2 231,600 1,279,630,000 0.018% June-20 7 0 0 0 1,210 1,049,490,000 0.00011% 2019-2020 77 10 11 7 431,819 13,373,470,000 0.0032% Annual Total 2018-2019 70 13 10 1 94,583 13,762,950,000 0.0007% Annual Total 2017-2018 65 12 15 0 64,892 11,323,130,000 0.0006% Annual Total 2016-2107 62 12 14 0 35,774 11,707,700,000 0.0003% Annual Total 2015-2016 73 12 15 0 157,949 12,083,570,000 0.0013% Annual Total 2014-2015 86 49 12 1 127,405 10,753,560,000 0.0012% Annual Total 2013-2014 82 30 15 0 106,384 11,840,630,000 0.0009% Annual Total 2012-2013 111 38 13 2 144,549 11,331,870,000 0.0013% Annual Total 2011-2012 117 61 10 0 65,273 11,289,980,000 0.0006% Annual Total 2010-2011 109 76 15 0 95,342 11,328,410,000 0.0008% Annual Total 2009-2010 106 77 16 3 1,840,134 12,291,330,000 0.0150% Annual Total 2008-2009 117 88 20 0 85,433 11,607,400,000 0.0007% Annual Total 2007-2008 129 N/A 31 1 142,412 11,473,040,000 0.0012% Annual Total 2006-2007 161 N/A 40 8 571,946 12,475,820,000 0.0046% Annual Total 2005-2006 159 N/A 46 3 317,585 12,182,250,000 0.0026% Annual Total 2004-2005 211 N/A 49 3 246,290 12,621,450,000 0.0020% Annual Total 2003-2004 241 N/A 69 2 322,050 12,822,200,000 0.0025% Annual Total 2002-2003 269 N/A 116 16 2,305,175 13,408,980,000 0.0172% Annual Total 2001-2002 228 N/A 70 1 338,806 11,467,900,000 0.0030% Annual Total 2000-2001 193 N/A 84 4 533,108 11,930,700,000 0.0045% Annual Total *See Appendix D (attached) for a complete listing of locations, Sanitary Sewer Overflow (SSO) Totals and SSO "Volume in Surface Water"for all spills during this fiscal year. **This is the total volume of treated waste discharged from the plant,but is assumed to be equal to what is collected. 1999-2000 189 N/A 119 9 1,154,350 12,289,000,000 0.0094% Annual Total *See Appendix D (attached) for a complete listing of locations, Sanitary Sewer Overflow (SSO) Totals and SSO "Volume in Surface Water"for all spills during this fiscal year. **This is the total volume of treated waste discharged from the plant,but is assumed to be equal to what is collected. • SSO Occurrences attributable to: For FY 2019-2020 Percentage Quantity total Grease 18 6.44% 27,972 Roots 9 0.59% 2,564 Debris 28 1.97% 8,543 Inflow&Infiltration 0 0.0% 0 Vandalism 1 0.12% 525 Pipe Failure 8 0.97% 4,200 Pump Station Equipment Failure 1 0.57% 2,500 Severe Natural Causes 9 89% 386,555 Other 3 0.34% 1,455 TOTAL 77 100% 434,314 Appendix D: 1 Probable Cause of Total SSO SSO Volume in Month/Year SSO Volume al Surface waters Location of SSO Jul 2019 7/5/2019 ARV Failure 5 0 6758 Linwood Dr. 7/14/2019 Roots 15 0 6718 Linwood Dr. 7/15/2019 Roots 20 20 6655 Lake Dale Way 7/17/2019 Roots 33 0 3305 Peters Creek Pkwy 7/27/2019 Debris 25 0 7932 Lasater Rd. Total for July 5 98 20 AUGUST 2019 8/2/2019 Debris 1 0 3325 Rosemont Ave. S/9/2019 Debris 500 500 495 Arbor Hill Rd. Total for August 2 501 500 SEPTEMBER 2019 9/3/2019 Pipe Failure 50 50 1332 Calvert Dr. 9/3/2019 Debris 225 68 4870 Thales Rd. 9/5/2019 Grease 75 50 2201 Reynolda Rd. 9/7/2019 Debris 25 0 4545 Glen High Rd. _ 9/18/2019 Pipe Failure 3,300 3,300 Allen Dr.&Old Greensboro Rd. 9/24/2019 Other 755 0 45 Cherry Cove Dr. 9/26/2019 Debris 2,840 2,840 (Outfall)Peters Creek Pkwy 9/27/2019 Other 400 0 707 Whispering Brook Rd. 9/30/2019 Pipe Failure 20 20 1312 Calvert Dr. Total for September 9 7,690 6,328 OCTOBER 2019 10/12/2019 Roots 1 0 4216 Yeaton Glenn Cir 10/12/2019 Debris 1 0 788 Beeson Rd. 10/20/2019 Grease 125 125 3300 New Greensboro Rd. 10/23/2019 Pipe Failure 50 50 125 Frazier Road 10/31/2019 Debris 2,125 1,594 1796 Silas Creek Pkwy 10/31/2019 Severe Natural Causes 18,000 18,000 4561 Cooper Rd. Total for October 6 20,302 19,769 NOVEMBER 2019 11/1/2019 Grease 10 0 4420 Ansley Dr. 11/10/2019 Grease 75 75 346 West Wall St. 11/19/2019 Grease 300 150 103 Autumn Oaks Circle. 11/19/2019 Grease 50 25 130 Alpine Court 11/22/2019 Roots 180 0 4920 Old Walkertown Rd. 11/25/2019 Grease 3,975 3,975 2914 Shorefair Dr. Total for November 6 4,590 4,225 l)ECEMBER 2019 12/22/2019 Grease 168 168 3481 Tinley Park Dr. 12/24/2019 Debris 652 137 702 West Mountain Rd. 12/28/2019 Debris 32 0 7744 Northpoint Blvd. Total for December 3 852 305 IANUARY 2020 1/17/2020 Debris 10 10 3501 Plaza Ridge Circle 1/21/2020 Pipe Failure 80 80 151 Edgeway Drive 1/22/2020 Debris 5 1 4311 Cooperfield Ridge Lane 1/23/2020 Debris 15 0 151 Edgeway Dr. 1/26/2020 Other 300 0 240 Ashbourne Lake Ct. 1/28/2020 Debris 450 50 607 Daffodil 1/31/2020 Debris 75 75 Intersection of Luther and Anderson St. Total for January 7 935 216 FEBRUARY 2020 2/4/2020 Grease 30 15 1820 Dunleith Ave. 2/6/2020 Severe Natural Causes 35 0 237 Staffordshire Rd. 2/6/2020 Severe Natural Causes 20 0 240 Staffordshire Rd. 2/7/2020 Grease 100 100 5680 Novack St.. 2/8/2020 Roots 465 465 3975 Leinbach Drive 2/8/2020 Debris 375 375 1428 Glade St.. 2/11/2020 Severe Natural Causes 30,000 30,000 5644 Shattalon Dr, 2/13/2020 Roots 50 50 49 Arita Circle 2/13/2020 Severe Natural Causes 36,000 36,000 6640 Shattalon Dr. 2/13/2020 Severe Natural Causes 39,800 39,800 4561 Cooper Rd. 2/13/2020 Severe Natural Causes 200 200 Behind 3686 Reynolda Rd. 2/24/2020 Grease 10 0 2055 Waterford Village Rd. 2/24/2020 Debris 150 150 1577 Robert Ward Dr. 2/28/2020 Debris 150 150 723 Ivy Ave. 2/29/2020 Roots 300 300 143 Woodrow Ave. Total for February 15 107,685 107,605 MARCH 2O20 3/3/2020 Debris 7 1 3203 Briarcliffe Rd. 3/25/2020 Severe Natural Causes 52,500 52,500 4561 Cooper Rd. 3/26/2020 Debris 70 0 407 Jefferson St. 3/26/2020 Debris 25 5 1275 Terry Rd. 3/28/2020 Debris 70 14 1003 William Dr. 3/31/2020 Debris 285 10 1006 14th St. Total for March 6 52,957 52,530 APRIL 2020 4/3/2020 Grease 150 12 2371 University Pkwy 4/7/2020 Debris 225 225 716 Indeneer Dr. 4/8/2020 Grease 504 328 1640 Cherry Blossom Ln. 4/13/2020 Grease 150 0 3736 Ogburn Ave. 4/19/2020 Grease 450 450 3410 Healy Dr. 4/20/2020 Debris 81 8 234 Silver Creek Trail 4/26/2019 Debris 39 0 401 Robbins Rd. 4/28/2020 Pipe Failure 300 300 125 Pratt Rd. 4/28/2020 Roots 1,500 1,500 105 Waddington Rd. Total for April 9 3,399 2,823 i MAY 2020 5/22/2020 Severe Natural Causes 210,000 210,000 4561 Cooper Rd. 5/26/2020 Grease 21,600 21,600 4093 Greene Haven Dr. Total for May 2 231,600 231,600 JUNE 2020 6/2/2020 Debris 10 0 1339 Glenn Oaks Rd. 6/3/2020 Vandalism 525 100 4260 Brownsboro Rd. 6/3/2020 Grease 150 150 4401 Bent Tree Farm Rd. 6/15/2020 Pipe Failure 100 100 1640 SM Ceasar Dr. 6/18/2020 Grease 50 0 4093 Greene Haven Rd. 6/23/2020 Debris 75 50 1202 Fairchild Rd. 6/28/2020 Pipe Failure 300 300 800 Rich Total for June 7 1,210 700 2020 77 431,819 426,621