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HomeMy WebLinkAbout4602T_Hertford_2023FA_CostApproval_FID1801845_20230602Moutos, Sarah From: Sent: To: Cc: Subject: Attachments: Follow Up Flag: Flag Status: laserfiche.ncdenr.gov@mccicloud.io Friday, June 2, 2023 5:26 PM ashIey jiIcott@hertfordcountync.gov; Moutos, Sarah Moutos, Sarah; Stanley, Sherri; Wilson, Donna J [External] APPROVAL -Transfer Station Financial Assurance Cost Estimate - 4602T- TRANSFER-1995 Hertford County Transfer Station Hertford Co TS Closure Plan final draft.pdf Follow up Flagged CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message button located on your Outlook menu bar on the Home tab. D,E Q`� _A • ND. TF CAF.CLIN.4 6/2/2023 Ashley Ward Solid Waste Manager Hertford County RE: Approved Cost Estimate Transfer Station - Hertford County Transfer Station Hertford County Dear Ashley Ward, A review of the Transfer Station Cost Estimate for 4602T-TRANSFER-1995 Hertford County Transfer Station submitted on 8/2/2022 has been completed. The estimate meets the site -specific operations and appears to be appropriate. Initial Review Comments: 20220802 - The Section entered and accepted Hertford County's cost estimate. Permitting Engineer's Review Comments: 20230602 - No concerns. Cost estimates are satisfactory and match the estimate in the submitted plan. The Division of Waste Management - Solid Waste Section has reviewed and approved the provided cost estimate required for establishing financial assurance for a transfer station. The cost estimate is provided for your use. Approved Cost Estimate = $ 89300.00 At this time, you may work with your Finance Department Director and have the approved cost estimate incorporated into the December 2023 Local Government or Capital Reserve submittal to the Section. Financial Assurance mechanism templates, NC Rules for financial assurance, and inflation multipliers are among the pertinent information you can find at the Section's Financial Assurance website: http://deq.nc.gov/swsfa. Should you or your Finance Department require any assistance, feel free to reach out to Sarah Moutos at 919-707-8287 or Sarah.Moutos@ncdenr.gov . Sincerely, Sarah Moutos Environmental Program Consultant Division of Waste Management - Solid Waste Section CC: Sherri Stanley Donna Wilson Sarah M Moutos HERTFORD COUNTY TRANSFER STATION CLOSURE PLAN I. INTRODUCTION AND BACKGROUND This transfer station closure plan has been created on behalf of the Hertford County Department of Solid Waste for the Solid Waste Handling and Transfer Facility on Mt. Moriah Road, Winton, NC (Permit 46-02T). Closure activities for this facility will be conducted in general accordance with this plan, the North Carolina Division of Waste Management (DWM) rules, and generally sound environmental and waste management practices. The MSW transfer facility accepts waste from Hertford County and transports its waste to the East Carolina Regional Landfill in Bertie County, Permit No. 08-03. Closure of the transfer station will commence at such time as determined by Hertford County, and in conformance with this plan. II. FACILITY LOCATION The Hertford County Transfer Station is located at 227 Mt. Moriah Road (SR 1174) at the end of SR 1203 approximately three miles north of the Town of Winton, and south of the intersection with Highway 158 North. Hertford County received their Life -Of -Site (LOS) permit effective April 10, 2019, with an expiration date of December 15, 2055. The physical address is: Hertford County Transfer Station 227 Mt. Moriah Road Winton, NC 27986 The mailing address is: Hertford County Transfer Station: P.O. Box 556 Winton, NC 27986 III. FACILITY OWNER The facility is owned and operated by Hertford County. The key personnel associated with operations are: Ashley Jilcott, Manager Solid Waste Department 227 Mt. Moriah Road P.O. Box 556 Winton, NC 27986 Telephone: 252-3 5 8-7867 IV. FACILITY DESCRIPTION The main transfer structure is a metal building constructed on a concrete slab with a concrete tipping floor. The building structure is open on all sides, with a concrete push wall at the rear of the tipping floor. Incoming loads are weighed at the scale house (office) prior to the waste being discarded onto the concrete tipping floor where it is inspected prior to being loaded into an over -the -top compactor attached to a transfer trailer. Both the compactor and transfer trailer are at ground level. Leachate that is generated from normal activities and from regular pressure washing of the tipping floor is collected through a drain located at the base of the push wall to the rear of the tipping floor, which drains into the onsite 1000-gallon concrete holding tank. V. SOURCE, TYPES, AND QUANTITIES OF WASTE The source of municipal solid waste is from residential and commercial facilities located within Hertford County. The transfer station accepted municipal solid waste (MSW); construction and demolition debris waste (C&D); special wastes, such as tires, electronics, white goods, used oil, asphalt shingles, yard trash and recyclables. The MSW handling and transfer facility is used solely for the handling and conveyance of municipal solid waste generated within Hertford County. The Facility will only accept solid waste as defined in G.S. 130A — 290(35). Any hazardous, liquid, or other prohibited materials found in the waste stream are removed and held for proper disposal. The waste, other than that which could be recycled, was transferred to the East Carolina Regional Landfill in Bertie County, Permit No. 08-03. According to the Annual Report for the State Fiscal Year 2020-2021, the facility transferred 7,680.20 tons of solid waste, or approximately 640 tons of waste per month to the East Carolina Environmental Regional Landfill in Bertie County. VI. CLOSURE PLAN The following describes the closure process for the Hertford County transfer station once a decision is made to cease operations. The facility will be properly closed in accordance with the requirements of 15A NCAC 13B .0406. A. Description of Closure Activities Prior to closure of the Hertford County Transfer Station, a written notification of the closure will be submitted to the NCDEQ Division of Waste Management (DWM) no less than ninety (90) days prior to the cessation of waste acceptance at the facility. All closure activities will be conducted in accordance with the Closure Plan and in accordance with 15A NCAC 13B .0406. Closure activities will begin no later than thirty (30) days after the receipt of the final waste load and will include removal of remaining solid waste, closure of the leachate collection system, and securing the premises, and will be completed with 180 days after beginning closure activities. All wastes currently being accepted at the facility will be removed from the site including, but not limited to the following: • Used tires are accepted and placed in a storage trailer until full, at which point they are taken to the contracted tire recycling firm. Once the final load of tires has been secured, a contract recycler will remove them from the transfer station facility for final disposal/recycling. • Used oil is collected in an aboveground 200-gallon storage tank, where it is periodically monitored and when full, pumped for recycling/disposal. All used oil will be removed from the storage tank and recycled/dispose of by a contract vendor. The tank will be cleaned in accordance with current regulatory requirements as applicable, and the tank scrapped for disposal. • White goods are accepted on site at a designated location. Appliances, some of which contain Freon, are accepted and stored before shipping to a metal recycling facility. Freon will be removed from all remaining white goods as applicable, and the white goods will be recycled by a contract vendor. All other scrap metal will be removed from the facility by a contract vendor. • Electronics are collected and staged on a concrete pad before moving into a building for storage until transported to a recycler for further processing. All electronics will be removed from the site and recycled by a contract vendor. • Asphalt shingles are accepted at a designated area, and are limited to recyclable tear off shingles that do not carry greater than 1 % asbestos. All shingles will be removed from the site and recycled by a contract vendor. All remaining wastes that will not be recycled, will be removed for proper disposal at an approved disposal location, currently the East Carolina Regional Landfill in Bertie County. Any solid waste located on the facility grounds, including wind-blown liter and accumulations of waste within the transfer station building and loading bay area, will be removed and disposed of in transfer trailers for final disposal at the referenced landfill. Recyclable wastes will be removed and disposed of as noted above, at an approved recycling facility, currently anticipated to be the same facilities that accept recyclable materials from the Hertford County Transfer Station. The transfer station building including the push walls, tipping floor and loading area will be pressure washed once all solid waste has been removed from the facility. Leachate from the pressure washing activity will be collected in the leachate collection system and removed for proper disposal. The transfer station structure will remain until such time as the County decides whether it can be repurposed for use. It is anticipated the pressure washing activities may require multiple mobilizations and several days to complete the work. Potential work stoppages may occur due to the leachate storage tank filling up, which will require pumping and hauling of the leachate for disposal. The leachate collection system consists of a drain located at the rear of the tipping floor at the base of the push wall, which is connected to a 1,000-gallon onsite storage tank. Once all remaining solid waste has been removed from the transfer station and the station has been pressure washed, any leachate remaining in the storage tank will be pumped and removed for disposal at an approved disposal facility. Hertford County anticipates the contractor currently responsible for pumping and hauling leachate, or another contractor as determined by Hertford County, will remove all remaining leachate from the tank for disposal at the Ahoskie Wastewater Treatment Plant, located approximately 10 miles from the transfer station. The drains, catchments, and piping connected to the leachate collection tank, as well as the tank, will also be cleaned through pressure washing, or other appropriate means to remove leachate residues. Any and all remaining leachate will be pumped a disposed as noted above. Upon removal of the remaining leachate, all drains connected to the leachate collection systems will be permanently plugged in a manner such that storm water or other liquids cannot enter the leachate collection system. Leachate piping will be removed and disposed of as solid waste at an approved landfill, and the leachate collection tank will either be removed for disposal, crushed in place or filled with a flowable fill to prevent the tank from being reused. The facility office and scale house will be emptied and secured against unauthorized entry. Hertford County may retain the office in the event the property is repurposed for another use. The facility grounds will be secured by a fence and locking gate in a manner to preclude easy accessibility to the property. Appropriate signage will be placed at the entrance to inform residents the facility is closed. B. Closure Schedule The closure schedule will be as follows: 1. Hertford County will send written notice to the DWM no less than ninety (90) days from the date the facility anticipates receipt of the last load of solid waste, with the last load of waste will be received after the required ninety (90) day notice. 2. Closure activities will begin within thirty (30) days from receipt of the last load of solid waste. 3. Within 180 days from the start of closure activities, Hertford County will complete the closure of the transfer station. 4. Upon completion of the closure, Hertford County will send a written notification to the DWM of the closure, and how the facility was closed, for placement in the operating record. 5. Hertford County staff will be available for any final inspection deemed necessary by the DWM. C. Corrective Action Hertford County will undertake any corrective action deemed necessary by the DWM in accordance with 15A NCAC 13B .0406(c). Specifically, Hertford County will conduct any required groundwater and surface water monitoring determined to be necessary at the facility after consultation with the DWM staff, in accordance with 15A NCAC 13B .0405(a)(2). Monitoring and corrective action, if required, will continue as post closure care until the DWM authorizes termination of any required activities. There is currently no post closure care associated with this facility due to impacts to either groundwater or surface water resources. Because no known impacts exist, no costs have been provided, since these costs would be highly dependent upon the nature and extent of the monitoring and/or corrective actions needed, and the duration of those activities. D. Closure Cost Estimate Closure costs associated with the final closure of the transfer station were estimated based on information available at the time of this closure report. It is currently unknown how much waste will need to be removed from the facility in the event of a closure. It is assumed that since this is a County owned facility, that it will continue to operate and dispose/recycle solid waste up to the time of closure when no additional waste will be received. Assumptions were made that considered a need to remove some additional wastes from the facility grounds as part of the "housecleaning" activities, therefore, costs were estimated based on these assumptions and current rates for particular activities. For the purposes of closure, it was assumed that up to three (3) transfer trailers would be needed to remove any remaining wastes not disposed of by contract vendors (recyclable materials). Current costs for a 40 yd. transfer trailer are < $750 per load inclusive of tipping fees for a 40 yd. trailer, filled and compacted to the degree possible. The estimated cost for three (3) trailers is $2,250. If additional trailers are needed for waste disposal or contractors mobilized to remove wastes in the event that not all the waste was removed by the various subcontractors (recycling vendors), the cost for waste disposal may increase. An estimate of $5,000 was used as a buffer for waste disposal purposes. Pressure washing costs are variable and dependent upon the scope of cleaning activities, whether there is a need for a lift to reach the higher elevations of a structure, the size of the tipping floor, loading bay area, and the amount of water generated during cleaning activities (adds to the leachate cost). Assumptions were made that pressure washing activities may require at least two (2) mobilization and cleaning operations, one for the facility and one for the leachate collection and storage system. To the extent possible, scheduling attempts will be made to reduce the time on site and number of mobilizations. Estimated mobilization charges of $1000 per visit and a per day rate of $1000 for a week (5 days) of pressure washing equates to a cost of $6,000 per event. Although Hertford County has a small tipping floor area, no outside walls for the transfer station structure or a loading bay, it was assumed that there would still be a need for two (2) pressure washing events, the total cost of which was estimated at $12,000. The leachate storage tank is 1,000 gal. in capacity. Current disposal rates at a wastewater treatment plant are estimated at less than $50011,000 gal. Typical hauling rates may range from $0.03 - $.10/gal on average, depending on the distance hauled to the nearest disposal facility. Assuming the higher values are used the estimated cost per 1,000 gals of leachate hauled would be approximately $600.00 ($500/1,000 gals. + $0.10 x 1,000 gals). Assuming three (3) pumping events, the total cost for leachate disposal would be less than $1,800.00. Decommissioning costs for the leachate collection system and tank will vary depending on whether the tank is crushed in place, filled with flowable fill or physically removed from the ground (the higher cost option). The estimated cost may vary between average of $10,000 for filling in place to as much as $50,000 for removal of the tank and backfilling the excavation. Hertford County's leachate collection system piping and drain system is limited in size and the tank is 1,000 gallons suggesting the cost of $10,000 may be more in line with expectations. Administration costs, if performed by a contracted firm as opposed to County staff, and assuming 20 hours of project oversight per week for six (6) months may range from $45,000 - $65,000. Travel time and per diem costs will drive up the administration costs by approximately $5,000 - $10,000. This estimate is inclusive of providing the required notification to the NC DEQ, arranging for various contractors including bid solicitation and contractor selection, and overseeing the closure activities. Costs may be less depending upon the staff level used for the project oversight, the actual amount of time needed on sight, and the amount of travel and per diem needed. For the purposes of closure, an estimate using the higher amounts for travel and per diem suggests the administration costs would be $55,000. Closure cost estimates, including any costs associated with post closure care monitoring and/or corrective action are not provided. In the event post closure care monitoring and corrective action is required by the DWM, costs will be revisited as required to ensure financial assurance requirements are maintained, and the closure plan will be modified to include post closure care requirements. Summarized costs associated with the closure of the facility include the following: 1. Mobilization/demobilization - $2,000 2. Pressure Washing - $10,000 3. Leachate Disposal - $1,800 4. Leachate Collection System - $10,000 Decommissioning 5. Signage - $500 6. Waste Disposal — Cleanup, - $10,000 Hauling, Tipping Fee 7. Administration - $55,000 Total Closure Cost Estimate - $89,300 E. Post Closure Care In the event the DWM requires groundwater and/or surface water monitoring, or corrective action at this facility in accordance with 15A NCAC 13B .0405(a)(2), additional information associated with the post closure care will be provided. In addition, cost estimates will be provided for any post closure care activities including the anticipated duration of time for post closure care. In the event the DWM requires post closure care monitoring or corrective action, or Hertford County elects to leave a leachate collection system and tank in place for future use, the County will submit to the DWM a notice for the site to be recorded with the Register of Deeds that will include the information stipulated in 15A NCAC 13B .0406(b)(4)(A — C) as follows: • The notice shall be discoverable during a title search for the site property deed. • The notice shall be in accordance with G.S. 130A-310.71(e) or G.S. 14313-279.10. • The notice shall notify any potential purchaser of the property that the land has been used as a solid waste management facility and its use may be restricted by the Division Hertford County may request in writing removal of land use restrictions in accordance with 15A NCAC 13B .0406 (d). F. Record Retention Records of the closure activities, final disposition of all wastes including recyclable wastes and leachate, will be retained for a minimum of five (5) years or as otherwise specified by 15A NCAC 13B .0405(d).