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HomeMy WebLinkAboutWQCS00284_Annual Performance_20190722Brunswick County Public Utilities Wastewater Collection and Treatment System Annual Report July 1, 2018 through June 30, 2019 System Overview ]np,.on Hwy W -_ •� A Wk,lt�llle � .i v Rleyelw •r „I �p 'ti4ndraTaaotra.•'14y R b ff` H, ,kkeBa6om :I� L.+6cwaccsmaY.• Hm 6gWn _i.:- A-- dacFr­ i £ Lxhe 1Yar•:Finav 5lalc Wr4 aR n 0. Legend FORCE MAIN D map n r � SANITAR Y ❑ IST RI CT s W W T P Serm oe Area CAR O LINA S HO R Es X �CASWELL BEACH C3NORTHEAST OCEAN ISLE BEACH SEWRAIL S HALLOTTE WEST B R UN SW1 CK M MUNICIPALITIES i y 6 i w E WNA, �IRAOCEAN ISLE EACH TR9/L SHORES" 1571 History WEST BRUNSWICK SHALLOTTE . p eeh�rn Wrlyrtrsf cm ,kky, s,- - NORTHEAST �' wantiw�n - y Intl Kmll v 'V1ilmirglar" .. h; 1, �`'� Myrne Groh r.+qA p69 - Oak I:.Innii BRUNSWICK COUNTY WASTEWATER SYSTEM L'�fi ��areoas Prepared 6 y The 6runswkk County Pudk UtilRks Department R pd� Cardlno I v geaeh - lai6c,ry-Ck a„i IC+re Beach rr.� ...I Sewer systems are generally required in areas where development density, the proximity to surface waters, or soil conditions prevent the proper function of septic systems. In recent decades there has been a greater need for sewer service in Brunswick County due to its abundance of surface waters, marginal soil conditions, and ever-increasing housing density as a result of it being a favorite retirement and vacation location. In the late 90s, Brunswick County began operating its first wastewater treatment plant (WWTP) to serve the Leland Industrial Park. Around this same timeframe many developers constructed small metallic "package" wastewater treatment plants in order to treat wastewater from their individual residential developments. Due to the increasing need for additional sewer treatment capacity from new development and the need for a higher standard of sewage treatment than these "package" wastewater plants could provide, Brunswick County began design and construction of the Northeast Brunswick Regional Water Reclamation Facility. This facility, located in the Town of Navassa, was completed in the summer of 2003 with an initial treatment capacity of 1.625 million gallons per day (mgd). It replaced the Leland Industrial Park WWTP as well as a developer - constructed "package" WWTP serving the Clairmont development in the Town of Leland. In 2013, the Northeast Brunswick Regional Water Reclamation Facility treatment capacity was upgraded to 2.475 million gallons per day. This facility provides sewer treatment for Brunswick County, the Town of Leland, the Town of Navassa, the City of Northwest, and residents within Brunswick Regional Water & Sewer H2GO's service area (Town of Belville, part of the Town of Leland, and some unincorporated areas). This facility is completing final permitting of a 2.5 mgd expansion. The project is scheduled to be bid in August 2019 and be placed in service in 2021. In 2004, Brunswick County acquired assets of the South Brunswick Water and Sewer Authority (SBWASA) and Carolina Blythe Utilities which provided sewer service to communities in the southern part of Brunswick County including the Towns of Calabash and Carolina Shores. Carolina Blythe Utilities' Carolina Shores Wastewater Treatment Plant, originally constructed in the late 1970s, is an extended aeration tertiary treatment plant with a sewer treatment capacity of 530,000 gallons per day. SBWASA's Sea Trail WWTP originally served the Sea Trail development in the Town of Sunset Beach and had a 200,000 gallon per day sewage treatment capacity. In 2007, Brunswick County expanded the treatment capacity of this non -discharge WWTP to 300,000 gallons per day. In 2010, Brunswick County completed construction of a sewer collection system for those areas within the Town of Calabash not yet having sewer service and in 2012 the Sunset Beach sewer system was completed by the County. Both of these sewer collection systems convey wastewater to the Sea Trail WWTP. Since acquiring the aging SBWASA and Carolina Blythe Utilities systems, Brunswick County has made significant improvements to both the sewer treatment facilities and the sewer collection systems. Many of the sewer pump stations contributing sewer flow to these WWTPs have been rehabilitated and significant improvements to both WWTPs have been constructed including flow equalization, diversion pump stations with interconnection force mains, process improvements, and capacity improvements. In June of 2006, Brunswick County acquired the Ocean Ridge WWTP, a 100,000 gallon per day non -discharge "package" plant serving the Ocean Ridge golf community located in southern Brunswick County. This WWTP has been decommissioned and all flow has been diverted to the Ocean Isle Beach WWTP. The largest of the County's sewer treatment facilities, the West Brunswick Water Reclamation Facility located in Supply, NC, was completed in 2006 to serve the unincorporated areas in central Brunswick County; the Towns of Supply, Bolivia, Holden Beach, St. James, and portions of Shallotte. Once completed, the existing "package" plants serving Brunswick Community College, Winding River development, and the Town of St. James along with a facultative lagoon serving the Brunswick County Government Complex were taken out of service and all sewer flow was diverted to the new facility. As part of the agreement with the Town of Shallotte, Brunswick County assumed ownership of the Town of Shallotte's WWTP. This WWTP is a facultative lagoon, non -discharge facility with a treatment capacity of 500,000 gallons per day. Due to subsequent piping improvements constructed by Brunswick County, excess flow to the Shallotte WWTP can be diverted to the West Brunswick Water Reclamation Facility. A three million gallon/day expansion to the West Brunswick Water Reclamation Facility was completed in 2009 to accommodate sewer treatment for the Town of Oak Island's sewer collection system. This brought the total sewer treatment capacity for the extended aeration tertiary treatment non - discharge facility to six million gallons per day. The plant contains a septage receiving station for septic haulers pumping wastewater from septic systems. In 2008, the City of Southport entered an agreement with Brunswick County and subsequently completed a connection to the regional transmission system to convey wastewater to the West Brunswick facility for treatment. An additional agreement with the City of Southport was recently terminated in which the City was designing and permitting, as part of the regional partnership, a 750,000 gpd treatment facility. The City has now begun design on their own facility; once completed Southport flows will be removed from the West Brunswick Regional System. Brunswick County and the Town of Ocean Isle Beach reached an agreement in 2012 whereby the Town conveyed the Ocean Isle Beach WWTP to the County. This facility is permitted to treat 1.050 mgd and current improvements include a diversion pump station and force main that allows a monthly average of 0.293 mgd to be transferred to the WBR Facility for treatment. In November of 2015, the Town of Caswell Beach conveyed its utility system to Brunswick County. The Caswell Beach sewer collection system is a combination of gravity, low pressure, and vacuum systems that pump wastewater to the Town of Oak Island's Fish Factory Road WWTP for treatment. Overall, Brunswick County currently operates six wastewater treatment plants with a permitted sewer treatment capacity of 10,855,000 gallons per day. The County provides retail sewer service within the municipalities of Boiling Spring Lakes, Bolivia, Calabash, Carolina Shores, Caswell Beach, Sandy Creek, St. James, Sunset Beach, Varnamtown, and the unincorporated areas of Brunswick County as well as providing wholesale sewer treatment to Holden Beach, Leland, Navassa, Northwest, Oak Island, Ocean Isle Beach, Shallotte, Southport, and H2GO. The County sewer transmission and collection system consists of over 600 miles of force main, gravity, low pressure, and vacuum sewer pipeline; 153 major pump stations; 3,393 manholes; and around 7,917 individual grinder pump stations. Additionally, Brunswick County operates and maintains the sewer collection system for the City of Northwest. Connection Programs New developments in Brunswick County located in proximity to a sewer line are required to construct sewer collection facilities in the development and all new homes must make connection to these facilities. Existing structures are not required to make connection to sewer collection systems when new sewer mains are constructed near them. Additionally, property owners that have failing septic systems, depending on their proximity to high pressure force mains, have an opportunity to connect to the system through the Rural Sewer Program. Requirements and fees for this type of connection can be found on the Brunswick County Web site. Additional information on this program is available atthe Brunswick County Engineering Department located in the County Government Complex (910-253-2500). Staff Training and Certification The combination of large diameter, high pressure sewer force mains, low pressure sewer grinder systems, vacuum sewer systems, gravity sewer systems, pumping stations, SCADA system, and wastewater treatment plants requires a highly - skilled and diverse staff for proper operation and maintenance. Wastewater Collection System and Treatment personnel are certified through the Water Pollution Control System Operators Certification Commission that is governed by North Carolina State law and administered through the North Carolina Department of Environmental Quality (NCDEQ). Brunswick County has 58 dedicated staff members within four divisions to provide operation and maintenance of the system: • Sewer Collection Division (19) - 15 NCWPCSOCC Certified Operators • Sewer Construction Division (6)- 5 NCWPCSOCC Certified Operators • Wastewater Treatment Division (24) - 21 NCWPCSOCC Certified Operators and Maintenance Technicians, 2 Certified Laboratory Technicians • Instrumentation & Electrical Division (9) - 4 NC Licensed Electricians To become certified by NCWPCSOCC and to become NC licensed electricians, individuals must meet certain education and experience criteria, complete required coursework, and must pass a state -administered exam. After initial certification, wastewater operators and licensed electricians are required to attend continuing education courses on an annual basis in order to maintain their certification. Additionally, Brunswick County provides frequent training in other areas: safety, valves, generators, HVAC, system maintenance, regulatory updates, and similar programs related to system operation and maintenance. OPERATION OF WASTEWATER TREATMENT PLANTS s<UDY TR,41_GPROGRHM L4r. I'ROG RAMS •US. F"IMI-Ital Protection Agency • OHica o' Water Programs Laboratory Analysis Over 8,000 laboratory tests are performed annually at the West Brunswick Water Reclamation Facility's Lab by certified laboratory staff to ensure compliance with Division of Water Resource's Water Quality Section requirements and National Pollutant Discharge Elimination System (NPDES) permits. On -site laboratory analysis allows for expedient operational adjustments to ensure efficient operation of the plant in order to maintain permit limits for the treated water leaving the plants. Brunswick County has an extensive reuse program that requires a high degree of treatment prior to using the treated wastewater (reuse water) for irrigation purposes. n '40 Treated Wastewater as a Resource Historically, once treated wastewater leaves a wastewater treatment plant it has been discharged into a stream or river. Brunswick County's older WWTPs do operate this way, but all newer WWTPs have been permitted as non -discharge facilities. Rather than discharging treated wastewater to a stream or river, a non -discharge WWTP uses the highly treated wastewater for large-scale irrigation. The highly treated wastewater is termed "Reuse Water". Brunswick County operates over 25 miles of reuse force mains that supply reuse water for irrigation to eleven golf courses and 1,040 acres of dedicated tree and turf farms at four different locations. Using reuse water for irrigation has several advantages. One major advantage is that reuse water replaces potable water from the County's water system that would have been used for irrigation. This reduces the peak loading on the water system which ultimately reduces costs and helps to reduce rate increases. Additionally, using reuse water for irrigation allows golf courses to reduce the amount of fertilizer applications on the courses. Golf courses using reuse water for irrigation include those in Sea Trail, Winding River, and St. James. Residuals Management The Wastewater Treatment Division oversees the disposal of biosolids from each of the wastewater treatment facilities. In Fiscal Year 2018-19 Brunswick County produced 3.9 mg of Class -A Biosolids and 0.3 mg of Class-B Biosolids. The biosolids are land -applied as soil amendments on farm fields by the County's contractor. The County is researching additional disposal alternatives through a Biosolids Master Plan in FY19. Fiscal Year 2018-2019 Highlights • Installation of 348 grinder pump stations in low pressure sewer areas • Forest Management Plan timber sale generated $150,000 • Infiltration pond maintenance for ponds #7, #8 and #9 at IP Tract • Rehabilitation of Oak Island Re -Pump Station • Replacement of Corroded DI force main piping and air reliefs • Recovery from Hurricane Florence Infiltration Pond Maintenance Line and Pump Station Rehab J ; `rams ----------------- Hurricane Recovery Planned Fiscal Year 2019-2020 Capital Improvements • Begin construction of a 2.5 mgd expansion at the NEBR WWTP • Design and permitting of a biosolids holding tank at Carolina Shores WWTP • Design and construction of jet aeration at WBR WRF Ditches #3 and #4 • Construction of additional infiltration basins for effluent disposal at the WBR WWTP drip irrigation site • New in -plant pump station at Carolina Shores Treatment Plant • New lift station at Ocean Ridge Maintenance Building Brunswick County Public Utilities Wastewater Collection and Treatment System Annual Report July 1, 2018, through June 30, 2019 House Bill 1160, the Clean Water Act of 1999, requires entities that own or operate wastewater treatment and collections facilities in North Carolina provide customers with an annual performance report. This report is available for viewing at the Brunswick County Public Utilities Operations Center or by logging on to our Web site at <www.brunswickcountync.gov>. Customers will be notified of its availability by printed notice on sewer bills. Questions, comments, or requests for paper copies of this report should be directed to the Brunswick County Public Utilities Department at 910-253-2657. This report has been completed by staff of the Utilities Department and is accurate to the best of our knowledge and belief. Steve Mastala Timothy Webb Wastewater Collections Superintendent Wastewater Operations Superintendent 910-253-2681 910-253-2479 West Brunswick Water Reclamation Facility Regulated Entity: West Brunswick Regional Water Reclamation Facility Operator in Responsible Charge: Michael Garrity Phone: 910-253-2479 Permit(s): WQ0023693 (Non -Discharge) Facility Description: • Permitted Flow: 6.0 million gallons per day • Treatment Type: Extended Aeration, Tertiary Treatment, Biological Nutrient Removal with Autothermal Thermophilic Aerobic Digestion (ATAD) process for solids handling • Discharge: Non -Discharge Permit — Reuse water applied to golf courses, infiltration basins, and dedicated tree farm surface irrigation sites Performance: Monthly Flow and Rainfall O � o • Annual Average Daily Flow: 3,945,171 gpd • Maximum Daily Flow/Date: 8,090,000 gallons July 31, 2018 • Total Annual Flow: 1,442,120,765 gallons • Total Rainfall: 103.57 inches • There was one daily limit failure of fecal coliform on September 27, 2018; although the plant passed all monthly requirements for this annual report. Northeast Brunswick Water Reclamation Facility Regulated Entity: Northeast Brunswick Regional Water Reclamation Facility Operator in Responsible Charge: Randy Bumgarner/Matthew Henry Phone: 910-383-2811 Permit(s): NC0086819 (Discharge) Facility Description: • Permitted Flow: 2.475 million gallons per day • Treatment Type: Extended Aeration, Tertiary Treatment, Biological Nutrient Removal with Autothermal Thermophilic Aerobic Digestion (ATAD) process for solids handling • Discharge: Discharge Permit — Cape Fear River Performance: Monthly Flow and Rainfall 7 • Annual Average Daily Flow: 2,199,142 gpd • Maximum Daily Flow/Date: 4,938,207 gallons September 16, 2018 • Total Annual Flow: 803,474,531 gallons • Total Rainfall: 72.87 inches • There was one notice of violation for exceeding average flow for the month of December. Ocean Isle Beach Water Reclamation Facility Regulated Entity: Ocean Isle Beach Water Reclamation Facility Operator in Responsible Charge: Scott Leonard Phone: 910-579-9365 Permit(s): WQ0006085 (Non -Discharge) Facility Description: • Permitted Flow: 1.050 million gallons per day • Treatment Type: Sequencing Batch Reactor • Discharge: Non -Discharge Permit — Reuse water applied to dedicated tree farm and turf farm surface irrigation sites Performance: Monthly Flow, Diversion Flow, and Rainfall • Annual Average Daily Flow: 325,214 gpd • Maximum Daily Flow/Date: 712,219 gallons July 7, 2018 • Total Annual Flow: 118,959,167 gallons • Total Flow Diverted: 52,017,793 gallons • Total Rainfall: 74.65 inches • In July and August 2019 plant exceeded daily permitted flow to WBR. During the permit renewal process this flow was changed from daily permitted flow to monthly average flow. Carolina Shores WWTP Regulated Entity: Carolina Shores Wastewater Treatment Plant Operator in Responsible Charge: Aaron Hewett Phone: 910-579-5323 Permit(s): NC0044873 (Discharge) Facility Description: • Permitted Flow: 0.530 million gallons per day • Treatment Type: Extended Aeration, Tertiary Treatment • Discharge: Discharge Permit —Tributary to Persimmon Swamp, Lumber River Basin Performance: Monthly Flow, Diversion Flow, and Rainfall 0 • Annual Average Daily Flow: 289,789 gpd • Maximum Daily Flow/Date: 413,000 gallons June 26, 2019 • Total Annual Flow: 105,451,000 gallons • Total Flow Diverted: 105,605,182 gallons • Total Rainfall: 75.30 inches • There were zero (0) Notices of Deficiency/Violation issued for this facility during the reporting period. Shallotte WWTP Regulated Entity: Shallotte Wastewater Treatment Plant Operator in Responsible Charge: Rhett Harrington Phone: 910-754-7744 Permit(s): WQ0000798 (Non -Discharge) Facility Description: • Permitted Flow: 0.5 million gallons per day • Treatment Type: Facultative Lagoon • Discharge: Non -Discharge Permit — Effluent water applied to tree farm surface irrigation sites Performance: Monthly Flow, Diversion Flow, and Rainfall I I 1 0 1 1YI • Annual Average Daily Flow: 136,509 gpd • Maximum Daily Flow/Date: 311,632 gallons May 28, 2019 • Total Annual Flow: 49,858,052 gallons • Total Flow Diverted: 100,419,000 gallons • Total Rainfall: 85.43 inches • There were no (0) Notices of Deficiency/Violation issued for this facility during the reporting period. _. ,7: 77,71 Ilk .F Sea Trail WWTP Regulated Entity: Sea Trail Wastewater Treatment Plant Operator in Responsible Charge: Clint Humphrey Phone: 910-279-9845 Permit(s): WQ0012748 (Non -Discharge) Facility Description: • Permitted Flow: 0.3 million gallons per day • Treatment Type: Extended Aeration, Tertiary Treatment • Discharge: Non -Discharge Permit — Reuse water applied to Sea Trail golf courses Performance: Monthly Flow, Diversion Flow, and Rainfall • Annual Average Daily Flow: 166,668 gpd • Maximum Daily Flow/Date: 242,000 gallons February 21, 2019 • Total Annual Flow: 60,830,000 gallons • Total Flow Diverted: 106,057,000 gallons • Total Rainfall: 76.59 inches • There were no (0) Notices of Deficiency issued for this facility during the reporting period. Overall Gallons and % Flow/Treatment Plant Brunswick County Collection System Regulated Entity: Brunswick County Wastewater Collection System Operator in Responsible Charge: Matthew Smith Phone: 910-253-2702 Permit(s): WQCS00284 Facility Description: Gravity Mains Low Pressure Vacuum Force Main Miles of Line 1 135 207 11 246 Facility Type Total Traditional Major Pump Stations 153 Vacuum System Stations 3 Low Pressure Grinder Pump Stations 7,917 Manholes 3,393 Performance: Total Flow: 2,580,693,515 gallons Feet of Gravity Line Cleaned & Inspected: 70,316 Percentage of Gravity Line Inspected: over 10% Aw Reportable Sanitary Sewer Overflows Brunswick County reports Sanitary Sewer Overflows in accordance with North Carolina General Statutes and NCDEQ guidance. Discharges of 1,000 gallons or more of untreated waste to the surface waters of the State require Publication of Notice of Discharge. Brunswick County had no discharges of 1,000 gallons or more to surface waters during the fiscal year. When Sanitary Sewer Overflows occur it is standard practice to inspect and remove the source of any blockages; repair, refurbish, and renovate collections facilities; and to clean up and disinfect spill areas. What is a Sanitary Sewer Overflow? A sanitary sewer overflow is a condition whereby untreated sewage is discharged prior to reaching sewage treatment facilities. Despite the best efforts of Brunswick County Public Utilities staff, sanitary sewer overflows (SSOs) occur in Brunswick County, just as they do in every other sewer system. The North Carolina Department of Environmental Quality Division of Water Resource's Water Quality Section defines a reportable SSO as any spill to surface waters of 1,000 gallons or more. Causes of Sanitary Sewer Overflows The most common cause of SSOs is due to grease deposits blocking sewer pipes resulting in the escape of raw sewage through manholes, sewer clean outs, and other entries into the sewer collection system. Sewer blockages also occur due to foreign objects being dropped into sewers and manholes, the flushing of non -biodegradable materials down the toilet, and the growth of roots into the sewer system piping. Excessive rainfall can also overload the sewer piping systems and pump stations. Additionally, the cutting of sewer mains by contractors and property owners in the course of excavation has become more problematic as Brunswick County becomes more urbanized. SSOs may also occur due to the failure of pipe or other mechanical equipment. What Brunswick County Public Utilities is doing to prevent and reduce Sanitary Sewer Overflows All pump stations and plant sites are equipped with a sophisticated Supervisory Control and Data Acquisition (SCADA) system that provides automated reports and high level alarms to operators tasked with monitoring the sewer system around the clock. Brunswick County staff is available 24 hours per day, 7 days per week to respond quickly to emergencies in order to prevent SSOs from occurring. Moreover, Brunswick County Public Utilities staff provides daily checks and maintenance to the piping, valves, pump stations, treatment facilities, and other components of the sewer system in order to minimize failures and maintains generators at each pump station for backup power during outages. Additionally, Brunswick County employs a contractor specializing in televised inspection of sewer mains to analyze at least 10% of its gravity sewer system each year. When repairs and blockages are noted, County staff expeditiously makes the needed repairs and maintenance using its wide array of construction equipment, jetting equipment, vacuum truck, and tanker truck. County staff constantly monitors system pressures, capacities, and conditions of the system to make recommendations for needed rehabilitation projects and capital projects to ensure adequate capacity. Each year, Brunswick County spends several million dollars as part of its Capital Improvement Plan to fund these projects. County staff also routinely mows utility easements to minimize the potential for vegetation to cause blockages within the system. As part of its Fats, Oils, and Grease (FOG) Program, Brunswick County helps to educate customers on the proper disposal of these items to minimize sewer blockages and encourages the public to contact Public Utilities if they see deficiencies or misuse of the sewer system. Additionally, Brunswick County is part of the NC 811 call system (www.NC811.org) that seeks to avoid utility damage due to excavation by the general public and contractors by providing proper notification and utility location services. What You Can Do to Prevent Sanitary Sewer Overflows 1) Contact Brunswick County Public Utilities if you see a maintenance issue, SSO, or someone misusing the public sewer system. 2) Never pour grease down sink drains or into toilets! Put grease in a disposable container and dispose of in the garbage or recycle where available. 3) Put strainers in kitchen sinks to catch food and debris and empty them into the trash. 4) Put wipes, napkins, cat litter, cotton balls, hygiene products, and latex products into the trash; never flush these down the toilet. 5) Speak with your neighbors about how to keep grease and other materials out of the sewer. Sewer blockages from grease and other foreign materials don't just impact the person putting them down the drain! When an SSO Occurs... Through active monitoring, maintenance, repair, staff training, investment, and outreach programs Brunswick County Public Utilities seeks to be a good steward of the environment. However, even with due diligence all utilities providing sewer service will experience SSOs from time to time. When an SSO occurs Brunswick County takes the following corrective actions: • Notification of the public in accordance with Division of Water Resource's Water Quality Section guidelines • Remove blockages from piping • Repair, refurbish, and renovate damaged or inadequate facilities • Cleanup and disinfection of spill area • Increase inspection frequency as warranted • Construct capacity improvements as warranted J 46 a ♦ 4F 6 _ Ll Lot's Tactlt the &reacse in This Kitchen! hashou1d I he;p a Vrevont (yra%c bui6lupb from bloc:kijri asG er Flinn. 0 Stup sww r owe &mm into stroois anal storm Arai nib. 0 Wwr Yha numbar of timas jou haw to ikan your greafr trap {faad sarvicm) E) (5 0 48 Dori'# • SaYk nonay sipent on cobtlr dcanups of bowa3k splits. Vrotect tlar givaliil of our wal". Put oil and grease in covered ezllection coniainmm Scrape food scrapes from inio trash cans and garbage bass arwi dispos& of properly. 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