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Home My WebLink AboutNCS000402_27_Mebane O&M Plan 2017_20210607CITY OF MEBANE Facilities Operation and Maintenance Plan for Reducing Stormwater Pollution Runoff From Municipal Operations Prepared by: alley, williams, carmen & king, inc. engineers and architects 740 chapel hill road - post office box 1179 burlington, north carolina 27216-1179 Revised March 2017 Project No. 10076 Table of Contents 1. Introduction.............................................................................................................. 1 2. Goals and Objectives............................................................................................... 1 3. Responsible Parties................................................................................................. 1 4. Facility Inspections...................................................................................................2 5. Site Assessments & Facility specific best management practices ........................ 3 5.1 City Hall............................................................................................................. 3 5.2 Planning & Inspections Department..................................................................3 5.3 Police Station.................................................................................................... 3 5.4 Fire Station 1..................................................................................................... 3 5.5 Fire Station 2.....................................................................................................4 5.6 Fire Station 3.....................................................................................................4 5.7 Public Works Facilities...................................................................................... 4 MainShop Building.................................................................................................. 5 WasteOil Tank......................................................................................................... 5 OpenGarages.......................................................................................................... 5 FuelingArea............................................................................................................. 6 Wastewater Treatment Plant Shop Building............................................................. 6 Garbage Truck Washout Structure........................................................................... 6 Greenhouse............................................................................................................. 6 Dumpsters................................................................................................................ 6 YardWaste Storage Area........................................................................................ 6 Leaf Collection Storage Area................................................................................... 7 Construction Debris, Soil and Aggregate Stockpiling Error! Bookmark not defined. General Best Management Practices....................................................................... 7 5.8 Wastewater Treatment Plant............................................................................. 7 5.9 Arts and Community Center.............................................................................. 7 5.10 Parks and Recreation Department.................................................................... 7 5.11 Recreation Center............................................................................................. 8 5.12 Lake Michael Park............................................................................................ 8 5.13 Holt Street Park................................................................................................. 8 5.14 City Owned Wastewater Pump Stations........................................................... 8 6. General Best Management Practices....................................................................... 8 6.1 Vehicle and equipment storage......................................................................... 9 6.2 Sweeping.......................................................................................................... 9 6.3 Waste Disposal................................................................................................. 9 6.4 Outdoor Material Storage.................................................................................. 9 6.5 Good Housekeeping Practices..........................................................................9 8. Annual Inspection Program............................................................................. 10 9. Employee Training.......................................................................................... 10 10. Record Keeping..................................................................................................... 10 Figures Facilities Operation and Maintenance Plan City of Mebane INTRODUCTION This Operation and Maintenance (O&M) Plan has been developed with the goal of preventing or reducing pollutant runoff from City of Mebane owned facilities and operations. It has been developed as required under Section G of the State of North Carolina's Pollutant Discharge Elimination System Stormwater Discharge Permit No. NCS000402, issued to the City effective July 1, 2005. This O&M Plan is an update from the original dated June, 2006, and describes the City owned facilities and their operations, identifies potential sources of storm water pollution at the facilities, recommends appropriate best management practices (BMPs) or pollution control measures to reduce the potential of discharge of pollutants in storm water runoff, and provides for periodic review of this O&M Plan. 2. GOALS AND OBJECTIVES The primary goal of the storm water permit program is to improve the quality of surface waters by reducing the amount of pollutants potentially contained in the storm water runoff from City owned facilities. Specifically, this Plan will be in place to reduce or eliminate the exposure of oil and grease, pesticides, herbicides, fertilizers, sediment, and other chemicals used by the City, to stormwater. With this understanding, the City has developed Best Management Practices (BMPs) to reduce or eliminate the stormwater exposure of pollutants from City activities to the maximum extent practical. 3. RESPONSIBLE PARTIES The Operation and Maintenance Plan Coordinator for this facility is designated as the Public Works Director, currently Mr. Wayne Pore. Resaonsibilities: A. Maintains materials, inventories, and handling and storage practices. B. Inspection and maintenance of best management practices. C. Plans and schedules education -training programs D. Annual site inspections and assessments. E. Coordinates clean up of spills and releases. April, 2017 Page 1 of 12 Facilities Operation and Maintenance Plan City of Mebane 4. FACILITY INSPECTIONS Each facility was inspected and evaluated with respect to their potential for generating polluted stormwater runoff. The City owns and operates the following facilities: Name of Facility Address Date of Inspection City Hall 106 E. Washington Street March 21, 2017 Planning & Inspections Department 102 S. Fifth Street March 21, 2017 Police Station 116 West Center St March 22, 2017 Fire Station #1 103 W. Washington St. March 21, 2017 Fire Station #2 405 N. First St March 21, 2017 Fire Station #3 1469 Mebane Oaks Rd March 24, 2017 Public Works Facility Corrigidor Road March 14, 2017 Wastewater Treatment Plant 701 Corrigidor Road March 14, 2017 Arts and Community Center 622 Corrigidor Road March 14, 2017 Parks and Recreation Dept. 622 Corrigidor Road March 21, 2017 Recreation Center 210 Lee Street March 21, 2017 Lake Michael Park 7300 Lebanon Road March 24, 2017 Holt Street Park 411 W. Holt Street March 24, 2017 Wastewater Pump Stations Third St 1138 S. Third Street March 14, 2017 GKN 300 Maple Lane March 14, 2017 Terrell St. 1160 Terrell St March 14, 2017 Farrar Lane 1101 Farrar Lane March 14, 2017 LJ Rogers 7501 Oakwood St March 14, 2017 GE 7013 Industrial Dr March 14, 2017 Byrd's 204 Washington St March 22, 2017 Fifth St 711 N. Fifth St March 22, 2017 N. Regional 1128 N. First St March 22, 2017 Fieldstone 1304 Fieldstone Dr March 22, 2017 Governor Green 1109 Birkdale Dr March 22, 2017 Walmart 1353 Mebane Oaks Rd March 22, 2017 SE Regional Old Hillsborough Rd March 22, 2017 Arbor Creek 3480 Old Hillsborough Rd March 22, 2017 Gravelly 4911 West Ten Rd March 22, 2017 April, 2017 Page 2 of 12 Facilities Operation and Maintenance Plan City of Mebane 5. SITE ASSESSMENTS & FACILITY SPECIFIC BEST MANAGEMENT PRACTICES A description of the operations and inspection results for each facility are presented below. A determination of the potential for stormwater pollution for each of the facilities is presented. In addition the stormwater management controls, or best management practices (BMPs) are listed below for each facility that was identified to have a risk for stormwater pollution. These BMPs will be implemented over the course of the following year to reduce the potential of pollutants entering the stormwater discharged from City owned facilities. 5.1 City Hall All of the operations performed at City Hall are administrative in nature and are contained within the building. No material handling or storage practices occur outside of the building. The parking lots and drainage systems appeared to be in good condition. The potential for stormwater pollution from this site was determined to be minimal. 5.2 Planning & Inspections Department Similar to City Hall, the operations at the Planning & Inspections Department are administrative in nature. Other than parking of City vehicles, there did not appear to be any material storage or handling outside of the building. The parking lots and drainage systems appeared to be in good condition. The potential for stormwater pollution from this site was determined to be minimal. 5.3 Police Station Similar to City Hall, the operations at the Police Station are administrative in nature. Other than parking of police vehicles, there did not appear to be any material storage or handling outside of the building. The parking lots and drainage systems appeared to be in good condition. The potential for stormwater pollution from this site was determined to be minimal. 5.4 Fire Station 1 Two fire trucks are housed at this site. There are two bays, one with floor drains that were connected to the storm sewer system but were re-routed through a grease trap and then connected to the sanitary sewer in 2012. At the end of the other bay is a small floor drain that is connected to the sanitary sewer. This drain is used primarily for washing the floor. The equipment is regularly washed at Station 2, but occasionally is washed at this station. No equipment maintenance or repair is performed at this facility. The potential for stormwater pollution from this site was determined to be minimal. April, 2017 Page 3 of 12 Facilities Operation and Maintenance Plan City of Mebane 5.5 Fire Station 2 This facility houses fire prevention and training offices, half of the City's fire apparatus and equipment, and firefighter accommodations. This facility is staffed 24 hours a day 7 days a week. No equipment maintenance or repair is performed at this facility. Equipment is washed inside the facility with the washwater draining through floor drains to a grease trap before discharging into the sanitary sewer system. All chemicals are properly stored in a fire safe cabinet. The potential for stormwater pollution from this site was determined to be minimal. 5.6 Fire Station 3 This station was built in 2015, this facility houses fire life safety offices, half the City's fire apparatus and equipment, and firefighter accommodations. This facility is also staffed 24 hours a day 7 days a week. All of the floor drains are connected to the sanitary sewer and have a grease trap. All chemicals are properly stored in a fire safe cabinet. This facility has two sodded bio-retention basins and a tree box system with underground retention and detention. The potential for stormwater pollution from this site was determined to be minimal. 5.7 Public Works Facilities The Public Works facilities consist of a main shop building, a waste oil storage tank, 2- open garages, a covered fueling area, a shop building used by the wastewater treatment plant, a garbage and vacuum truck cleanout structure, a greenhouse used by the appearance commission, two roll -off dumpsters, and outdoor, uncovered areas for yard waste, leaf collection, and construction debris, soil and aggregate stockpiling. See the attached Public Works Site Map. The City of Mebane's Public Works Facility performs the following activities: • Storage, maintenance, and repair of City owned trucks and equipment. • Storage of misc. materials used in the repair and maintenance of the City's water and sewer systems. • Fueling of City owned vehicles. • Residential garbage collection. • Street sweeping. • Outdoor storage of gravel, construction debris, and dirt. • Leaf collection and storage. • Yard waste collection and storage. April, 2017 Page 4 of 12 Facilities Operation and Maintenance Plan City of Mebane Main Shop Building There are several offices, a break area, restroom, 4 work bays, a wash bay, and a tools & equipment storage bay in the main shop building. Maintenance and repairs are performed in the work bays for all city owned equipment and vehicles. Each work bay and the wash bay have floor drains that discharge to a grease trap before entering the sanitary sewer system. The areas immediately outside the bay doors are concrete and slope away from the building. 55 gallon drums of hydraulic fluid, oil, and degreaser are stored at the facility, along with small quantities of transmission fluid, anti -freeze, misc. solvents and cleaners. These are stored in quart and gallon containers in a steel flammables cabinet, in a locked room within the work bays, or on secondary containment vessels. All waste oils are stored onsite in a diked waste oil steel tank. The used oil and degreaser are collected by a waste oil recycler. Granular absorbent material is readily available for cleanup of spills and leaks. Washing of trucks and vehicles (including police vehicles) is performed in the wash bay. However, during the summer months, some washing occurs outside on the pavement. This wash water enters the storm drainage system and flows to the south towards MoAdams Creek. All washing should be done within the wash bay and when cleaning bays direct water towards the floor drains to reduce the potential for stormwater pollution. Waste Oil Tank A single wall steel tank is located behind the facility on the northeast corner of the paved area. Originally, only an unsealed concrete block dike with a concrete bottom and open drain was the only pollution protection measures in place. Through past inspections and recommendations, the oil storage tank area has been re -modeled to reduce the potential for stormwater pollution. The block containment dike has been rebuilt and sealed. A concrete apron and curb has been installed around the dike so waste oil can be transferred to the storage tank easier and a canopy was installed over the entire tank area. Spill kits are in place at this site. During the 2017 inspection it was noted that there was some evidence of spills outside the contained area and the secondary containment unit needs to be cleaned out. The oil rag disposal trashcan needs to be emptied regularly and stored under the shelter. Open Garages These buildings are located west of the main building and border the employee parking lot. They are used for storing public works vehicles (garbage trucks, street sweeper, small trucks, tractors, etc.). No material storage was observed in either of these buildings. To reduce the potential for stormwater pollution, ensure all leaky equipment is repaired, lids are on all trash cans, and oil and chemicals are properly stored. April, 2017 Page 5 of 12 Facilities Operation and Maintenance Plan City of Mebane Fueling Area The covered fueling area is used by the public works, the Fire department, and Police Departments for fueling City Vehicles. It consists of three aboveground storage tanks and pumps, 1,000 gallon gasoline, 1,000 gallon on -road diesel, and 500 gallon off - road diesel. The tanks and pumps are covered, but the vehicle area is not. The fueling area is paved and stormwater flow is across the paved area to a grass swale. Because of the materials involved, there is a potential for stormwater pollution. Ensure Standard Operating Procedures (SOP) for spill cleanup are posted on site and ensure any spills are properly cleaned. Investigate the possibility of installing a berm to divert stormwater from flowing across the paved area. Wastewater Treatment Plant Shop Building This metal building is located west of the vehicle storage buildings and is used by the Mebane Wastewater Treatment Plant (WWTP) as a shop and storage area. The shop contains torque fluid, gear oil, misc. electrical supplies, pumps, and motors. Because of the materials involved, there is a potential for stormwater pollution. Ensure the site has spill kits and any spills are properly cleaned. Garbage Truck Washout Structure This structure is located south on the main building. It consists of a concrete sloped floor with a manhole sized drain connected to the sanitary sewer and three brick walls. Garbage and vacuum trucks are washed here and any solid waste deposited on the drain grate is taken to the landfill. The potential for stormwater pollution from this site was determined to be minimal. Greenhouse This small greenhouse is located near the washout structure. It is used by the City's appearance commission to grow small potted plants and flowers. The potential for stormwater pollution from this site was determined to be minimal. Dumpsters Dumpsters are located along the north boundary of the public works area. Two uncovered roll -off dumpsters are used to temporarily store heavy garbage, such as appliances, and the other for scrap steel and metals. Three smaller dumpsters contain plastic products, cardboard, and aluminum products. The potential for stormwater pollution from this site was determined to be minimal. Yard Waste Storage Area The City of Mebane performs curbside yard waste pickup for its residents. This material is stored in an area southeast of the main building. The yard waste is periodically ground into mulch and used for City landscaping. There is a thick vegetative buffer between the edge of the storage area and MoAdams Creek to the April, 2017 Page 6 of 12 Facilities Operation and Maintenance Plan City of Mebane east. The potential for stormwater pollution from this site was determined to be minimal. Leaf Collection Storage Area The City also provides curbside leaf collection. The collected leaves are stored in an area west of the fueling area where they compost. The potential for stormwater pollution from this site was determined to be minimal. General Best Management Practices Ensure Standard Operating Procedures (SOP) for spill cleanup are posted at all places where spills may occur (ex. Waste oil storage tank, fueling area, salt storage). Observe all general best management practices to reduce the overall potential for stormwater pollution. 5.8 Wastewater Treatment Plant The WWTP has had a NPDES Industrial Stormwater Permit and Stormwater Pollution Prevention Plan (SWPPP) since 2003. The SWPPP addresses such items as material storage and handling, spill prevention, spill response, preventative maintenance, and employee training. As part of this inspection, the permit and SWPPP were reviewed to determine if the WWTP was meeting the requirements set out in both. Stormwater inspections have been performed and are up to date; also regular outfall monitoring and ongoing visual inspections show no stormwater pollution at any of the WWTP outfalls. 5.9 Arts and Community Center The Mebane Arts and Community Center (MACC) contains meeting rooms, offices, and a gymnasium. Activities associated with the operation of the MACC do not involve materials that are a potential source of stormwater pollution. The Parking lots and storm drainage system appear to be in good condition. The potential for stormwater pollution from this site was determined to be minimal. 5.10 Parks and Recreation Department This department has an office in the MACC and provides athletic leagues, events, and leisure services. This department uses and maintains four soccer fields and four baseball/softball fields on the north and southwest sides of the MACC. Professional landscapers are contracted to apply fertilizers or herbicides required for field maintenance. There is a small shed located at the back of the complex where lawn mowers and a gator are kept, everything in the shed was well maintained and things were properly stored in a fire safe cabinet. One piece of older equipment was located on the exterior of the building, no visible signs of leaking. The potential for stormwater pollution from use of these fields was April, 2017 Page 7 of 12 Facilities Operation and Maintenance Plan City of Mebane determined to be minimal. In addition, the parking lots and storm drainage system are in good condition. 5.11 Recreation Center The Recreation Center contains meeting rooms, offices, tennis courts, and a playground. Activities associated with the operation of the Recreation Center do not involve materials that are a potential source of stormwater pollution. The Parking lots and storm drainage system appear to be in good condition. The potential for stormwater pollution from this site was determined to be minimal. 5.12 Lake Michael Park The Parks and Recreation Department operate Lake Michael Park. Activities at this park include fishing, walking, small non -motorized boat rentals, and group camping. The park has two water quality devices which require routine annual maintenance. The first is a sodded bio-retention basin that needs to have trash removed from its surface regularly and requires an annual inspection of its dam, outlets and surrounding areas. The second is a Contech Hydrodynamic Separator (HDS) adjacent to the second parking lot. The HDS unit needs to be inspected on a regular basis for sediment, leaf, and other debris. The potential for stormwater pollution from activities at the park was determined to be minimal. 5.13 Holt Street Park This small fenced park has only picnic facilities. The potential for stormwater pollution from this park was determined to be minimal. 5.14 City Owned Wastewater Pump Stations The City owns and operates 15 wastewater pump stations. Although each pump station is unique, they all consist of a wet well fed by a gravity sewer line (or lines), either submerged or dry pit pumps, and an emergency generator. Fuel for the generators is diesel, propane, or natural gas. The diesel generators have an internal double -wall sub -base fuel tank. Nine of the pump stations use the chemical Nitro-Nox to control odors. The Nitro-Nox is stored in a polyethylene double walled tank on a concrete slab. Other than the potential of a stream impact due to a pump station failure, there was no significant potential for stormwater pollution at any of the pump stations. All pump stations are checked daily by public works or WWTP personnel. 6. GENERAL BEST MANAGEMENT PRACTICES The following general BMPs will be implemented to minimize the potential for stormwater contamination from everyday operations at City owned facilities. April, 2017 Page 8 of 12 Facilities Operation and Maintenance Plan City of Mebane 6.1 Vehicle and equipment storage Remove and dispose of all unused vehicles and equipment, if possible. If vehicles and equipment are to be stored outside for longer than a month, drain fluids. When practical, cover equipment and divert storm water around the equipment. 6.2 Sweeping Increase City-wide street sweeping to cover all curb and gutter within the City every 2 months. In addition, sweep all the paved areas around the main building and fueling areas at the public works facility once a week. Dirt and debris collected during the sweeping will be disposed of at the landfill. 6.3 Waste Disposal • All wastes (including solid waste, waste oil, empty drums) generated by the City will be properly disposed of via outside contractors. • Wastes will be stored in containers sealed from precipitation or stored under cover or inside buildings. 6.4 Outdoor Material Storage • Remove and dispose of all unnecessary materials, equipment, and debris. • Store materials on pallets or elevated platform to prevent corrosion. • Cover materials with tarps to minimize exposure. • All empty containers stored outside will be tightly sealed and the outside free of contamination. 6.5 Good Housekeeping Practices • Work, storage, and vehicle parking areas are to be kept clean and orderly. • Routine maintenance and cleaning of areas that are exposed (or have the potential to be exposed) to stormwater runoff will be performed to minimize stormwater pollution. • Sweep or dry mop when cleaning outdoor areas. Avoid washing or hosing down the area. • Clean up spills promptly. • Ensure Standard Operating Procedures (SOP) for spill cleanup are posted. April, 2017 Page 9 of 12 Facilities Operation and Maintenance Plan City of Mebane 8. Annual Inspection Program Annual inspections of all City owned facilities will be conducted and this plan reviewed. The effectiveness of the BMP's implemented during the previous year will also be evaluated. Based on the results of the inspections and BMP evaluation, this Operation and Maintenance Plan will be updated and modified to ensure the risk of stormwater pollution from City operations is minimized. 9. Employee Training An employee training program has been developed and implemented to educate public works employees about the requirements of this O&M Plan. This education program will include background on components of the O&M Plan and hands-on training in spill prevention and response, good housekeeping, proper material handling, disposal and control of waste, washing, and inspection procedures. All new employees will be trained within one week of their start date. Additionally, all employees will be required to participate in an annual refresher training course. The training program will be reviewed annually by the Plan Coordinator to determine its effectiveness and to make any necessary changes to the program. 10. RECORD KEEPING Annual Inspection forms, training records, information on all BMP's implemented, and any waste and/or recycling receipts shall be maintained on site for a minimum of five years. April, 2017 Page 10 of 12 FIGURES ' �. City u P Facilities - �7 V. A �. C Pump f •7�r_ Stations - _.Y s A •`'.�, g STREET PARK' .• � � +� - � yam' .' d � �. ; !'._ .L!� L _ ��} a +�, -... 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L tn� � 740 chapel hill road p.o. box 1179 C burlington, n.c. 27215 (336)226-5534 DATE: March 2017 .;.., - TO DRAWN BY.- SKS -� ', r ^� CHECKED BY.- JSJ EXHIBIT MAP JOB NO: 10076 04 100 10 P 1 inch = 100 feet