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NCG021033_Application_20240206
Elliott Consulting 202 Elliott Road PO Box 112 Aydlett, North Carolina 27916 NC Department of Environmental Quality Phone: 252-339-9021 Division of Energy, Mineral and Land Resources Stormwater Program 1612 Mail Service Center Raleigh, North Carolina 27699-1612 Subject: The Sandlot- NPDES NCG020000 NOI - Permit Application RECEIVED K ;> 1014 To Whom It May Concern: DEMLR On behalf of Mr. Lee Graham Hoggard, Elliott Consulting is requesting review of this NCG020000 Notice of Intent for an NPDES General Permit for Mine Dewatering, slated for development in Merry Hill Township, Bertie County, North Carolina. The operation is referred to as the Lee Hoggard Sand Mine based on family ownership of the property and includes a total permit area of 14.69 acres. The following documents are enclosed to support the Application (2 copies of each): • Application for NCG020000 coverage for proposed dewatering activity. • $120 permit Processing Fee • Copy of submitted NCDEQ DEMLR Mining Permit Application • Copy of submitted NCDEQ DWR Registration Application for Water Usage • Mine and Reclamation Maps • Adjoinder Notification Map • USGS Quad Site Map We respectfully ask for your review of the above-listed enclosures as they support the requested mining permit application and NPDES General Permit application for the proposed Lee Hoggard Sand Mine. Should you have any questions or need any additional information, please do not hesitate to contact me. We thank you for your time and review of this request. Regards, 4 Ken Elliott Elliott Consulting 02-02-2024 FOR AGENCY USE ONLY NCG02.L Q 3 3 Assigned to: Q. cc)�)V� ARO FRO MRO RRO ARO WIRO WSRO Division of Energy, Mineral, and Land Resources Land Quality Section National Pollutant Discharge Elimination System NCG020000 Notice of Intent This General Permit covers STORMWA TER AND/OR WASTEWATER DISCHARGES associated with activities under SIC(Standard Industrial Classification)Code 14[Mineral Mining Industry]except for:peat mining, coal mining, metal mining, oil and gas extraction, tourist gem mines, NCDOT borrow pits, in-stream sand mining, and discharges from mining operations which are intermixed on site with stormwater from concrete operations. You can find information on the DEMLR Stormwater Program at deq.nc.gov/SW. Directions: Print or type all entries on this application. Send the original, signed application with all required items listed in Item (9) below to: NCDEMLR Stormwater Program, 1612 MSC, Raleigh,NC 27699-1612. The submission of this application does not guarantee coverage under the General Permit. Prior to coverage under this General Permit a site inspection will be conducted. 1. Owner/Operator(to whom all permit correspondence will be mailed): Name of legal organizational entity: Legally responsible person as signed in Item(10)below: Lee Graham Hoqqard Lee Graham Ho and Street address: City: State: Zip Code: 644 Ledrew Perry Road Merry Hill NC 27957 Telephone number: Email address: 252-325-0348 hoggardl@yahoo.com Type of Ownership: Government ❑County ❑ Federal ❑ Municipal ❑ State Non-government ❑ Business(If ownership is business,a copy of NCSOS report must be included with this application) ® Individual 2. Industrial Facility(facility being permitted): Facility name: Facility environmental contact: Lee Haggard Sand Mine Lee Graham Haggard Street address: City: State: Zip Code: 142 NC 45 South Merry Hill NC 27957 Parcel Identification Number(PIN) County: 6853-46-7303 Bertie Telephone number: Email address: 252-325-0348 hoggardl@yahoo.com Latitude of entrance: Longitude of entrance: 36.027962 N -76.782532 W 4-digit SIC code: Facility is: Date operation is to begin or began: ❑ New ❑ Proposed 1442 IN Existing Mining permit#08-27 issued 01-15-2014 Types of minerals mined at this facility: ❑ Clay ❑ Feldspar Ore ❑ Lithium Ore ❑ Phosphate ®Soil ® Construction Sand ❑ Industrial Sand ❑ Other: Page i of 11 Is this a processing-only facility for materials mined elsewhere? Is this an inactive mine site? ❑Yes ❑Yes IR No 10 No Does total area of this mine site include ready-mixed concrete plant and/or asphalt plant areas? ❑Yes,and has separate NPDES stormwater permits(provide permit numbers): ❑Yes,and does not have separate NPDES stormwater permits 10 No Does this facility already have a valid Mining Permit from DEMLR's Land Quality Section? Rl Yes(please provide the Mining Permit Number) Permit#08-27 ❑ No(please indicate the status of the Mining Permit application) Are you applying for a discharge permit in the same location as a previously permitted mine? ❑Yes(please provide permit number and mine name) IN No If the stormwater discharges to a municipal separate storm sewer system(MS4),name the operator of the MS4: 10 N/A 3. Consultant(if applicable): Name of consultant: Consulting firm: Ken Elliott Elhoft Consultina Street address: City: State Zip Code PO Box 112, 202 Elliott Road Aydleft NC 27916 Telephone number: Email address: 252-339-9021 ken@kenobx.com 4. Development Activities and Buffers Mining operation will precede development activities at this site: ❑Yes 19 No Mine is located within one of the 20 Coastal Counties,and will it add more than 10,000 ftz of impervious surface: ❑Yes(to both) ® No,this mine is within one of the 20 Coastal Counties,but will not at more than 10,000 ftz of impervious surface ❑ No,this mine is not within one of the 20 Coastal Counties Mine is in the Neuse,Tar-Pamlico,or Catawba River Basins,OR in the Randleman or Jordan Water supply Watersheds? ❑Yes(specify size of stream buffers) ® No Mine site will include wastewater discharges from a ready-mix concrete batch plant? ❑Yes(please seek additional coverage under General Permit NCG140000:Ready-Mix Concrete) ® No S. Mine Dewatering Mine dewatering will occur at this site: ®Yes ❑ No(mark N/A for the rest of this section) Mine dewatering from this facility will be discharged to: ®Surface Waters and/or Wetlands ❑Other(specify) ❑Mine will not discharge dewatering to Surface Waters and/or Wetlands;specify how dewatering will occur and where water will be directed: ❑N/A Page 2 of 11 Wetlands and/or Surface Waters are within 400'of the mine pit perimeter: 404/401 Certification permits required: ®Yes(specify distance) 275 feet ❑Yes(briefly describe) ❑ No R) No ❑ N/A ❑ N/A Have you been required to obtain a wetland delineation certified by the US Army Corps of Engineers? ❑Yes(please attach to this application) ® No 6. Wastewater Treatment Will this facility wash mined materials? ❑Yes ® No Will discharges of process wastewater treatment systems occur(including possible recycle system overflows) ❑Yes(please describe) ® No Will this facility employ chemical additives to flocculate suspended solids? ❑Yes(specify name/manufacturer/quantity of daily use) ® No Note:please visit:htttps://files.nc.gov/ncdeg/Water+quality/Environmental+Sciences/ATU/PAM8 30 18.odf for list of approved PAMS Will any of the wastewater treatment facilities at this mine overflow only during rainfall events that exceed the 10-yr,24-hr rainfall event? ❑Yes(specify which systems) ® No Are wastewater treatment facilities(including recycle systems) planned in the 100-year flood plain? ❑Yes I& No Wastewater Treatment Altemative Review as required by 15A NCAC 2H.0105(c)(2) Types of wastewater this mine site will discharge: ® Mine Dewatering ❑ Process Wastewater Types of wastewater considered for this alternative review: ® Mine Dewatering ❑ Process Wastewater Are there existing sewer lines within a one-mile radius? ❑ Yes ❑Wastewater treatment plant will accept wastewater ❑ Is feasible to connect(explain) ❑ Is not feasible to connect(explain) ❑Wastewater treatment plant will not accept wastewater(please attach letter documenting this) ® No Page 3of11 Are you already proposing a closed-loop recycle system(CLRS)that meets design requirements of 15A NCAC 2T.10000? ❑Yes,for dewatering ❑Yes,for process wastewater ❑Yes,for both ❑ No,this option is technologically feasible(explain) ® No,this option is not technologically feasible(explain) Inadequate space for system. ❑ No,this option is otherwise feasible(explain) ❑No,this option is otherwise not feasible(explain) What is the feasibility of building a CLRS compared to direct surface water discharge? Building and maintaining a treatment system prior to discharge is more feasible than a CLRS. Surface or Subsurface Disposal System ❑ A surface or subsurface disposal system is technologically feasible(explain) ®A surface or subsurface disposal system is not technologically feasible(explain) Inadequate space and power source. ❑ A surface or subsurface disposal system is otherwise feasible to implement(explain) ❑ A surface of subsurface disposal system is not otherwise feasible to implement(explain) What is the feasibility of employing a subsurface of surface discharge as compared to a direct discharge to surface waters? Building and maintaining a treatments stem prior to discharge is more feasible than a subsurface or surface discharge system. Direct Discharge to surface waters is the most environmentally sound alternative to all reasonably cost-effective options for the wastewaters being considered? ®Yes ❑ No If this review included all wastewater discharge types,would excluding some types make any of the above non-discharge options feasible for some the wastewaters? ❑Yes ® No 7. Outfalis(s)At least one outfall is required to be eligible for coverage. 3-4 digit Identifier: Name of receiving water: Classification: ❑This water is impaired. so I Salmon Creek C;NSW ❑This watershed has a TMDL. Discharge from this outfall is from: ❑ Stormwater ® Mine Dewatering ❑ Process Wastewater 7Q10 Flow of receiving waterbody(if discharging Mine Dewatering or Process Wastewater to waters classified as HQW, ORW,Tr,WS-I,WS-II,WS-111,SA,or PNA): Discharge occurs from this outfall: ❑ Only during a rainfall event ® Intermittently(indicate how often) 1 ❑ Continuously(indicate flow in CFS) Avg 12 hrslday(daily upon need, 12-1q times per year) Latitude of outfall: Longitude of outfall: 36.025716 N -76.784882 W Brief description of the industrial activities that drain to this outfall: Dewatering 12-acre sand mine excavation to 0.63-acre sediment pond to treat wastewater. Outfall is sediment pond overflow Do Vehicle Maintenance Activities occur in the drainage area of this outfall? ❑Yes ® No If yes,how many gallons of new motor oil are used each month when averaged over the calendar ear? 3-4 digit identifier: Name of receiving water: Classification: ❑This water is impaired. ❑This watershed has a TMDL. Page 4 of 11 Discharge from this outfall is from: ❑Stormwater ❑ Mine Dewatering ❑ Process Wastewater 7Q10 Flow of receiving waterbody(if discharging Mine Dewatering or Process Wastewater to waters classified as HOW, ORW,Tr,WS-I,WS-11,WS-III,SA,or PNA): Discharge occurs from this outfall: ❑Only during a rainfall event ❑ Intermittently(indicate how often) ❑ Continuously(indicate flow in CFS) Latitude of outfall: Longitude of outfall: Brief description of the industrial activities that drain to this outfall: Do Vehicle Maintenance Activities occur in the drainage area of this outfall? ❑Yes ❑ No If yes,how many gallons of new motor oil are used each month when averaged over the calendar year? 3-4 digit identifier: Name of receiving water: Classification: ❑This water is impaired. ❑This watershed has a TMDL Discharge from this outfall is from: ❑Stormwater ❑ Mine Dewatering ❑Process Wastewater 7Q10 Flow of receiving waterbody(if discharging Mine Dewatering or Process Wastewater to waters classified as HQW, ORW,Tr,WS-1,WS-11,WS-III,SA,or PNA): Discharge occurs from this outfall: ❑ Only during a rainfall event ❑Intermittently(indicate how often) ❑ Continuously(indicate flow in CFS) Latitude of outfall: Longitude of outfall: Brief description of the industrial activities that drain to this outfall: Do Vehicle Maintenance Activities occur in the drainage area of this outfall? ❑ Yes ❑ No If yes,how many gallons of new motor oil are used each month when averaged over the calendaryear? 3-4 digit identifier: Name of receiving water: Classification: ❑This water is impaired. ❑This watershed has a TMDL. Discharge from this outfall is from: ❑Stormwater ❑ Mine Dewatering ❑Process Wastewater 7Q10 Flow of receiving waterbody(if discharging Mine Dewatering or Process Wastewater to waters classified as HQW, ORW,Tr,WS-1,WS-11,WS-III,SA,or PNA): Discharge occurs from this outfall: ❑ Only during a rainfall event ❑ Intermittently(indicate how often) ❑ Continuously(indicate flow in CFS) Latitude of outfall: Longitude of outfall: Brief description of the industrial activities that drain to this outfall: Do Vehicle Maintenance Activities occur in the drainage area of this outfall? ❑ Yes ❑ No If yes,how many gallons of new motor oil are used each month when averaged over the calendar year? 3-4 digit identifier: Name of receiving water: Classification: ❑This water is impaired. ❑This watershed has a TMDL. Discharge from this outfall is from: ❑ Stormwater ❑ Mine Dewatering ❑Process Wastewater 7Q10 Flow of receiving waterbody(if discharging Mine Dewatering or Process Wastewater to waters classified as HQW, ORW,Tr,WS-I,WS-11,WS-III,SA,or PNA): Discharge occurs from this outfall: Page 5 of 11 ❑ Only during a rainfall event ❑ Intermittently(indicate how ontinuously(indicate flow in CFS) Latitude of outfall: Longitude of outfall: Brief description of the industrial activities that drain to this outfall: Do Vehicle Maintenance Activities occur in the drainage area of this outfall? ❑ Yes ❑ No If yes,how many gallons of new motor oil are used each month when averaged over the calendar year? All outfalls must be listed and at least one outfall is required.Additional outfaiis may be added in the section "Additional Outfalis"found on the last page of this NOI. 8. Other Facility Conditions(check all that apply and explain accordingly): ❑This facility has other NPDES permits. If checked,list the permit numbers for all current NPDES permits: ❑This facility has Non-Discharge permits(e.g.recycle permit). If checked,list the permit numbers for all current Non- Discharge permits: WA ®This facility uses best management practices or structural stormwater control measures. If checked, briefly describe the practices/measures and show on site diagram! Gravel construction entrance, sediment pond riprap outfall protection, berm around active areas of mine, positive stormwater drainage into pit. ®This facility has a Stormwater Pollution Prevention Plan(SWPPP). If checked, please list the date the SW PPP was implemented: January 2024 ❑This facility stores hazardous waste in the 100-year floodplain. If checked,describe how the area is protected from flooding: N/A ❑This facility is a(mark all that apply) WA ❑ Hazardous Waste Generation Facility ❑ Hazardous Waste Treatment Facility ❑ Hazardous Waste Storage Facility ❑ Hazardous Waste Disposal Facility If checked,indicate: Kilograms of waste generated each month: Type(s)of waste: How material is stored: Where material is stored: Number of waste shipments per year: Name of transport/disposal vendor: Transport/disposal vendor EPA ID: Vendor address: ❑This facility is located on a Brownfield or Superfund site If checked, briefly describe the site conditions: WA ❑ Facility provides appropriate secondary containment for bulk storage of liquid materials If checked, briefly describe these measures: Fuel tank on site for equipment fuel will be a double wall tank within secondary containment(concrete/composite style). ❑ Site has an active landfill within the mining permit boundary WA If checked,please indicate type: a) ❑ LCID(Land clearing and Inert Debris) b) ❑ other(specify) Page 6 of 11 9. Required Items(Application will be returned unless all of the following items have been included): ® Check for$120 made payable to NCDEQ ❑ Copy of most recent Annual Report to the NC Secretary of State(if applicable) ®This completed application and any supporting documentation ® Copy of the approved mining permit or indication of mining permit application status ❑ Copy of US Army Corps—approved wetland delineation(if applicable) ® Une drawing of the water flow through the facility or block flow diagram ® Pictorial description of the nature of any sources of water and any collection and treatment measures ®A site diagram showing,at a minimum, existing and proposed: a) outline of drainage areas b) surface waters c) stormwater management structures d) location of stormwater outfalis corresponding to the drainage areas e) runoff conveyance features f) areas where process materials are stored g) impervious areas h) site property lines ® 2 copies of large scale(24"06"minimum)site plan showing: a) topographical lines b) all outfall locations c) applicable buffers and delineated wetlands d) receiving waters e) 100-year flood plain(if applicable) ® Copy of county map or USGS quad sheet with the location of the facility clearly marked if mines site is in one of the 20 Coastal Counties(if applicable) 19 Applicant has check with the appropriate regional office to verify the need for a Coastal State Stormwater permit. a) Indicate the Regional Office Contact: WARO Varun Prakash ❑ Detailed list of: a) impervious surface areas and percentages b) sub-drainage areas c) total drainage area If mine is dewatering and near wetlands,or may otherwise impact surface waters or groundwater lid 2 copies of large scale(24"x36"minimum) plans delineating areas on the listing acreage including: a) wetlands b) ditches c) well-placements d) pits e) borrow areas f) overburden storage g) stormwater controls/BMPs h) vehicle maintenance areas i) settling basins j) product process(such as screening,stockpiles, and waste piles) k) total drainage area 1) impervious surface percentages(if state Stormwater programs apply) m) applicable buffers n) access and/or haul roads ® Pump dewatering size and information on its specifications Page 7 of 11 ❑ Well information(design,depths,maintenance) ® Physical monitoring for the wetland areas © Settling pond size information,if applicable ❑ Level spreader design,if applicable ® Details about dewatering method ❑ Cone of influence calculations ® Description of measures to prevent erosion and flooding ❑ Description and information about 401/404 permits that have been obtained ❑ Copy of US Army Corps of Engineers wetlands delineations or approved wetland delineation(if applicable) ® 1 have contacted my local regional office about a Pumping Operation and Monitoring(POM)plan a) Regional Office Contact: WaRO Varun Prakash b) Date Contacted: 1-18-2024 10.Applicant Certification: North Carolina General Statute 143-215.6B(i)provides that: Any person who knowingly makes any false statement, representation,or certification In any application,record,report,plan,or other document filed or required to be maintained under this Article or a rule implementing this Article. . .shall be guilty of a Class 2 misdemeanor which may include a fine not to exceed ten thousand dollars($10,000). Under penalty of law, I certify that: © I am the person responsible for the permitted industrial activity,for satisfying the requirements of this permit,and for any civil or criminal penalties incurred due to violations of this permit. ®The information submitted in this NO[is,to the best of my knowledge and belief,true, accurate,and complete based on my inquiry of the person or persons who manage the system,or those persons directly responsible for gathering the information. R) I will abide by all conditions of the NCG020000 permit.I understand that coverage under this permit will constitute the permit requirements for the discharge(s)and is enforceable in the same manner as an individual permit. It] I hereby request coverage under the NCG020000 General Permit. Printed Name of Applicant: Lee Graham Hopgard Title: Owner January 29,2024 gnature of Applicant) (Date Signed) Mail the entire package to: DEMLR—Stormwater Program Department of Environmental Quality 1612 Mail Service Center Raleigh,NC 27699-1612 Page 8 of 12 PUMPING OPERATION AND MAINTENANCE PLAN SAND MINE DEWATERING WITH SEDIMENTATION POND Owner: Lee Graham Hoggard,644 Ledrew Perry Road, Merry Hill, NC 27957 Operator: B.E. Singleton &Sons, Inc.,920 W.Third Street,Washington, NC 27889 Job Location: Lee Hoggard Sand Mine, 142 NC 45 South, Merry Hill, NC 27957,Permit#08-27. County: Bertie County Prepared by: Ken Elliott, consulting Date: February 2, 2024 This plan defines responsibilities for operating, inspecting, and maintaining equipment and structures used for dewatering the Lee Hoggard Sand Mine safely,and that dewatering will not degrade or negatively impact any wetlands or waters of the state. Description and Current State of the Lee Hoggard Sand Mine Site(Permit#08-27)and Mining Application: The Lee Hoggard Sand Mine is an existing 12.67-acre sand mine excavation operated by B.E.Singleton & Sons, Inc.,in a 14.69-acre permit area on a parcel owned by Lee Graham Hoggard,applicant. The mine is located 1.2 miles northeast of Merry Hill, NC at 142 NC 45 South, and 4.5 miles west of Albemarle Sound, in Bertie County.The permit area is on cultivated,sandy land at 35-ft elevation,owned by the applicant, located near an unnamed tributary of Salmon Creek leading to Chowan River. Currently Mr. Hoggard is applying for a mining permit modification with the NCDEQ Division of Energy, Mineral and Land Resources to add dewatering to the permit and begin the dewatering operations in February or March 2024. An NPDES General Permit application for dewatering is being submitted to NCDEQ and registration for water usage has been submitted to the Division of Water Resources. Stormwater Pollution Prevention Plan is under development and will be implemented upon approval of the discharge permit application and before dewatering operations begin. Sand Mine Dewatering: It will be necessary to dewater the pond as it is being excavated to allow excavating equipment to enter the area safely and efficiently remove the sand from the pond bottom. This will allow for full permitted depth of excavation of the pond and proper reclamation of the edges of the pond. It is the intention of the operator to only dewater the excavation as needed,which will not entail full-time dewatering. For excavation purposes, dewatering will occur intermittently 12-16 times per year. The operator plans to excavate approximately 25,000 cubic yards of sand at a time while dewatering and stockpile it for later usage. Once the stockpiled sand is depleted,the operator will dewater the excavation again and remove another quantity of sand. Mine dewatering wastewater will be treated before release to the Waters of the State. Use of a sedimentation pond separate from the excavated mine is a traditional and effective means to remove sediment from wastewater generated during mine dewatering operations. Sedimentation Pond Construction and Overflow Discharge: The operator has constructed a sediment pond inside his existing excavation by blocking off the east end of the excavation with a sand berm. The berm has a 30-ft wide peak with interior 2:1 slope,effectively making a separate 0.63-acre pond. At the end of excavation activity,the operator will remove the berm and incorporate the sediment pond in with the main excavation. The sediment pond will be located between the proposed excavation site and wetlands 120 feet to the northwest into which the sediment pond will overflow during dewatering activity.The wetlands drain 1.5 miles to Salmon Creek,then lead 8.4 miles to Chowan River. Sediment pond water level will be controlled by a half-pipe flash-board water height control device installed in the southwest corner of the sediment pond berm.This control structure will allow water to flow across the flash boards into a 25'long x 15"wide buried PVC discharge pipe running westward through the berm 20 feet to an outlet discharging to a 25-foot-long riprap-protected constructed ditch, leading 50 feet to wetlands. From there, discharged water will flow 8.4 miles through Salmon Creek to Chowan River and Albemarle Sound. Dewatering Procedure: The operator will install an 8-inch dewatering pump between the main excavation and sediment pond at the southwest end of the excavation.Discharged water from the dewatering pump will enter the sediment pond at its northeast corner and will overflow through a constructed half-pipe flash board water height control device (construction diagram attached) discharge point located on the southwest corner of the sediment pond.The discharge point will release clear water through the water-height control device into the existing discharge ditch draining to wetlands and Salmon Creek. Water will be pumped from the excavated pond to the sediment pond by the 8-in gasoline-powered transfer pump operating at idle speed,approximately 1100 rpm. Estimated maximum flow from the pump will be 8,000 gallons/hour,operating 12 hours per day,0.096-mgd. It is the intention of the operator to drop the water level in the excavation approximately 20-25 feet below normal ground level as needed. Time and distance will allow all sedimentation to occur to acceptable levels before the overflow water reaches outfall and then the waters of the State.Water will have to travel a minimum of 210 feet to reach the overflow point which will give enough surface area to allow sufficient sedimentation to occur. There will be a minimum of 1.5 feet of freeboard between the water surface in the sediment pond and the top of the sediment pond bank. Stormwater drainage will be unable to enter the sediment area and damage the sediment pond rates,due to the height of a surrounding 4-ft tall sediment pond berm. Wetlands Protection: Removing water from the excavation using a sedimentation pond with overflow is a valid dewatering method for this size excavation. The pond can be dewatered quickly,and water removed from the pond will be used to uniformly hydrate adjacent wetlands. Once dewatered,excavation activity will be focused on removing sand from the pond as quickly as possible to shorten the periods of dewatering. This will allow groundwater level in the pond to return to normal as soon as possible to lessen possible impacts to adjacent wetlands,once dewatering ceases. Groundwater Control: Groundwater levels are not expected to be impacted in areas outside of the immediate excavated dewatering area. Groundwater levels are expected to remain stable despite dewatering of the excavation. The excavation site is surrounded on two sides by wetlands with drainage connection to Salmon Creek. Groundwater level depletion is not expected to affect any neighboring groundwater wells.The closest residence to excavation is located 235 feet from the proposed excavation. This residence is located near wetlands and has a groundwater supply well which is 420 feet deep. There are no other residences within 500 feet of the excavation. The area is served by Bertie County Water System. Sedimentation and Erosion Control: The operator will maintain a minimum 25-ft wide unexcavated buffer on the north,south,east,and west sides of excavation activity. All erosion and sedimentation will remain inside the permit area.The operator will construct and maintain a 10-ft wide x 2-ft tall grass-covered sand berm around the perimeter of the current affected area of the excavation during all phases of operation, inside the unexcavated buffer.Stormwater falling inside the active mining area will be directed to drain into the excavation by diversion drains. Maintaining the Dewatering Equipment and Erosion Control Measures: Inspections and maintenance are required to obtain the intended function of safely dewatering the sand mine,and to maintain the life of any nearby wetlands or waters of the State. Items to inspect and maintain during the anticipated 10-year life of the mine dewatering permit are: • Inspect embankments, berms and appurtenant structures, and repair as needed. • Monitor overflow ditches for damage or stoppage from beaver activity, repair as needed. • Repair any damage to vegetated areas or berms with compacted earth fill, reshaping,sodding, reseeding,and mulching as needed. • Promptly repair all leaks in delivery facilities by replacing valves,fittings,gaskets,and worn or damaged parts. • Maintain all screens,filters,valves,timers,and other electrical and mechanical equipment in good operating condition,following manufacturer's recommendations. Monitoring the Dewatering Process and Effects of Dewatering: Analytical and qualitative monitoring of mine dewatering wastewater will be in accordance with the NCG020000 permit,as follows: • Lee Hoggard Mine will discharge mine dewatering wastewater into Salmon Creek,classified as C;NSW,Chowan River,classified as B;NSW,and Albemarle Sound, classified as B;NSW. Discharge water will be analyzed quarterly per requirements of the NPDES permit. • Discharge water will be sampled quarterly and analyzed for pH,Total Suspended Solids (TSS), turbidity,and salinity. Samples with benchmark exceedances will require the operator to increase sampling, per NPDES permit, until sample results are cleared. • All excavated ponds in the Lee Hoggard Mine permit area will be inspected daily by the operator to identify any abnormal conditions. • All berms and erosion control structures will be inspected for damage monthly and within 24 hours after every storm event greater than 1.5 inches,and all structures will be repaired immediately. • Special inspections will be conducted immediately following severe storms,vandalism,and other significant events. • Dewatering process will be inspected daily during periods of dewatering the excavation. • Rain gauge data will be collected by monitoring local rain gauge data monthly and after each rain event. Wetlands Monitoring: Wetlands are located westward of the Lee Hoggard Mine site. Level 1 wetlands landscape assessment by US Fish &Wildlife Service indicate two types of wetlands on the Hoggard parcel: • PFOIA-Temporary flooded,freshwater forested/shrub wetlands. • PFO6F—Semi-permanently flooded,freshwater forested/shrub wetlands. Level 2 wetlands assessment has not been performed on the site. Discharge ditches will serve as hydration devices to help maintain normal groundwater levels. Operator will monitor drainage ditches weekly to always ensure presence of water in the ditch. Records Data will be collected as follows: • Visual monitoring of adjacent wetlands and farmland for potential dehydration during mining or dewatering activities will take place weekly. Solutions to any degradation caused by any mining activity will include alteration of dewatering process. DWQ will be consulted as needed; alterations to the process will be recorded. • Elliott Consulting will maintain the following records in a permanent file at the Elliott Consulting office at PO Box 112, 202 Elliott Road,Aydlett, NC 27916: a record of all significant actions taken; as-built drawings; permits; analytical results from sampling; and related material. Copies of all inspections, monitoring reports and lab analyses shall be provided to NCDWQ on a regular basis and as requested. • Stormwater Pollution Prevention Plan and other pertinent documents and records will be available online for inspection at www.singleton-sp3.com. BMP Conditions • The permittee will utilize best management practices to ensure that dewatering the Lee Hoggard Mine will not degrade or negatively impact any wetlands or waters of the State. BMP's will include: o All berms and erosion control and sedimentation control structures will be inspected for damages monthly and within 24 hours after every storm event greater than 1.5 inches, and all structures will be repaired immediately. o Temporary gravel construction entrance will be maintained at foot of mine access road at intersection with County Line Road. o Operator will maintain riprap outfall protection on the overflow drainage ditch downstream of sediment pond. o Groundcover will be established on all sections of the permit area when not in use by mining activities. Signed, Ken Elliott for Lee Graham Hoggard, owner Lee Hoggard Mine, Merry Hill, NC February 2, 2024 Water Height Control: Construction Details Half-pipe Water Level Control with Flash Board Risers NRCS Code 587 Lee Hoggard Sand Mine Merry Hill, NC Bartle County 1 � Jr WN F ffi . i C �?iC � ..E �k y0.xr •a:+gY �k + p � '� w�� R5 'iT' emergency so" W, water detention level row ett�artkrnertt gra" �^ ^ �_�_ �'T barrel �`a brrel�, ,. .. . ' sedimenn forebay \\\\\ concrete be" DESCRIPTION A structure in a water management system that conveys water, controls the direction or rate of flow, maintains a desired water surface elevation or measures water. Water height control structure is standard structure used by agricultural and horticultural farms in North Carolina to raise or lower water height in ditches and ponds per need (NRCS). Water height control structure to be installed in the south berm of the sedimentation pond at Lee Hoggard Sand Mine. Overflow to be directed down stabilized ditch to nearby ground-levelling ditch, eventual outflow to Chowan River and Albemarle Sound. PURPOSE To convey water from one elevation to a lower elevation within, to, or from a water conveyance system, such as a ditch, channel, canal, or pipeline designed to operate under open channel conditions. Typical structures: drops, chutes, turnouts, surface water inlets, head gates, pump boxes, and stilling basins (NRCS). This water management system will be used to maintain a maximum water surface elevation in the sedimentation pond at Lee Hoggard Sand Mine, NC 45, Merry Hill, NC. Sedimentation pond is a part of the dewatering management system of Lee Hoggard Sand Mine, used to remove settleable matter and turbidity from mine dewatering wastewater. CONSTRUCTION Structure consists of 26' x 3' horizontal galvanized steel culvert running under the sedimentation pond berm. A vertical 6' half pipe 52"x 30" is attached on the north end of the culvert with stacked flash boards allowing adjustable height of the water level in the sedimentation pond. Water flows over the flash boards and into the discharge pipe and down the rip-rap stabilized ditch. Overflow ditch is lined with riprap for 20 feet down its length. Existing slopes adjacent to the culvert are heavily grassed with natural grass and weeds with no erosion present. MAINTENANCE Structures will be checked and necessary maintenance, including removal of debris, shall be performed after major storms and at least semi-annually. << _c Q. Ken Elliott, consulting February 2, 2024 Discharge Outfall Outlet Protection: Construction Details Practice Standards and Specifications 6.41, 6.31, 6.15 Lee Hoggard Sand Mine Merry Hill,NC Bertie County 6.41 Outlet Stabilization Structure 6.31 Riprap and Paved Channels 6.15 Riprap Pipe Outlet to Well-defined Channel A A S 1 __ z^d 11 ,. III Pd-�,1�-.' Filter blanket Trapezoidal Riprap Channel Design top width kin L Fillerlayer.gravel - orfabric Riprap lined apron located at end of mine dewatering overflow pipe to prevent scour and undermining in discharge ditch, and to absorb the impact of the water flow and reduce the velocity to non-erosive levels before flow reaches wetlands. Riprap Apron Size: Overflow pipe discharges directly into well-defined channel. The apron will extend across the channel bottom and up the channel banks to the top of the bank. Length of apron will be 20- feet downstream to maintain velocity control of maximum 2.0 feet per second. Grade: Apron will have zero grade and no overfill at end of apron. Alignment: Apron will be straight throughout entire length if possible. If curve is necessary to align-the— apron with the receiving channel,the curve will be located in the upstream section of the riprap. Materials: Riprap will consist of a well graded mixture of NCDOT Class A(2"to 6")stone or slag. Thickness: Minimum thickness of riprap will be 1.5 times the maximum stone diameter. Filter: Operator plans to install a layer of heavy duty silt fence filter cloth between the riprap and the underlying soil to prevent soil movement into or through the riprap. Filter cloth will extend to the top of both channel banks, and edges will overlap 12 inches. Upstream end will be buried 12 inches and downstream end will be buried if necessary. Maintenance: inspect riprap outlet structures weekly and after significant rainfall events to see if any erosion around or below the riprap has taken place, or if stones have become dislodged. Repair all damage immediately. Maintain all vegetation adjacent to the channel in healthy condition to prevent scour or erosion during out-of-bank flow. Control weeds and brush growing in the riprap by cutting. Ken Elliott, consulting February 2, 2024 Berm Construction Details Lee Hoggard Mine Merry Hill, NC Bertie County Narrow-based berm The narrow-based berm is the most common berm having a top of 2 feet(0.6 m)and side slopes of two horizontal: 1 vertical.This berm is the most economical to build as it requires the least material.The steep side slopes of this type of berm eliminate the possibility of working on it with farm machinery. to, a- z 4' NEW BERM EXISTING_ GRADE Berm Construction The berm construction comprises of the scraping back of the topsoil from the area where the berm and storage basin are to be built.A subsoil material, free of stones, rubble, stumps etc. and with at least 10% clay should be used to construct the berm. The material for the berm may be obtained from the area behind or in front of the berm location or moved from a borrow pit located elsewhere on the farm. An earth mover will be required to move material from a pit located a distance away while a bulldozer would be used if material is in the berm area. The berm material is to be placed in layers and compacted as each layer is added. After the berm has a final shape,the sides of the berm should also be compacted. Emergency Overflow To provide for larger-than designed peak flows, an overflow system is used, namely: • "The level-top vegetated berm crest" which provides for very flat berm top so that the water will overflow along the berm length in a thin layer so as not to create erosion problems. Ken Elliott,consulting February 2, 2024 Sediment Fence (Silt Fence) Construction Details: Practice Standards and Specifications 6.62 Lee Hoggard Sand Mine Merry Hill,NC Bertie County cM: Atr• e A temporary permeable barrier erected on small, disturbed areas to capture sediment from sheet flow. It is made of filter fabric buried at the bottom, stretched, and supported by steel posts. Planning: Silt fence will be installed along the perimeter of a 12-ft wide access road when crossing an existing field ditch. Narrow width of fenced area will allow only shallow pools to form behind fence while promoting deposition of sediment and preventing sedimentation into adjacent wetlands. Ends of fence will be curled uphill in "J" pattern to prevent end flow. Stabilized outlets will be provided to protect the fence system and release storm flow that exceeds the design. Design considerations:Silt fence will be constructed of extra-strength synthetic filter fabric. Height of fence will not exceed 2 feet above natural ground level, and will be constructed from a continuous roll to minimize joints. All joints will be fastened at a support post with 4 feet minimum of overlap. Extra-strength filter fabric will be fastened to road side of steel posts(installed 2 feet deep)every 6 feet(every 8 feet if using standard strength filter fabric with wire mesh backing) and fastened with wire ties. Trench will be excavated along inside of fence approximately 4 inches wide by 8 inches deep, into which 12 inches of fabric will be placed along the bottom and side of the trench. Trench will be backfilled and compacted. Maintenance: Inspect sediment fence every week and after each rainfall. Make any required repairs immediately. Replace any collapsed, damaged,or decomposed fence promptly. Remove all fencing materials and unstable sediment deposits and bring the area to grade and stabilize it after the contributing drainage area has been properly stabilized. Ken Elliott,consulting February 2, 2024 Temporary Gravel Construction Entrance/ Exit Details Practice Standards and Specifications 6.06 Lee Hoggard Sand Mine Merry Hill, NC Berne County SO MO Piet' C min < 2-,1 2 c coarse aggregate F' Figure a.Na Gra.e a rua xit keeps sodmart from luv g Ve wstrueuon site(modified from Va 9 CC). Graveled pad located at entrance office access road at Lee Hoggard Sand Mine,where traffic moves directly onto NC 45. Thickness: 6 inches minimum Width: 25 feet Length: 40 feet minimum Aggregate Size:2-in to 3-in coarse slag Maintenance: Maintain the gravel pad to prevent mud or sediment from leaving the construction site. Periodic top dressing with 2-inch stone will occur as needed during the life of the permit. After rainfalls, immediately remove all objectionable materials spilled, washed,or tracked onto public roadways. (Z Ken Elliott, consulting February 2, 2024 GROUND STABILIZATION AND MATERIALS HANDLING PRACTICES FOR COMPLIANCE WITH EQUIPMENT AND VEHICLE MAINTENANCE uutiE cuxRETE WASHOUT THE NCGOS CONSTRUCTION GENERAL PERMIT 1. Maintain vehicles and equipment to prevent discharge of fluids. STRUCTURE WITH LItOR Implementing the details and specifications on this plan sheet will result in the construction 2. Provide drip pans under any stored equipment. activity being considered compliant with the Ground Stabilization and Materials Handling .,., sections of the NCG01 Construction General Permit(Sections E and F,respectively). The 3. Identify leaks and repair as soon as feasible,or remove leaking equipment from the project. permittee shall comply with the Erosion and Sediment Control plan approved by the M delegated authority having jurisdiction.All details and specifications shown on this sheet 4. Collect all spent fluids,store in separate containers and properly dispose as may not apply depending on site conditions and the delegated authority having jurisdiction. hazardous waste(recycle when possible). 44� 5. Remove leaking vehicles and construction equipment from service until the problem lT mjw- 1111� ••• ML.. MIL.. .... •�•�• A..SECTION E:GROUND STABILIZATION has been corrected. �� Required Ground Stabilization Timeframes 6. Bring used fuels,lubricants,coolants,hydraulic fluids and other petroleum products Stabilize within this to a recyclingor disposal centerthat handlesthese materials. aaa � �•• �L • � Site Area Description days after many calendar ceasing Timeframe variations erm+reams..s„ „ wove rae. vffi m."M .�*•r Y g LITTER,BUILDING MATERIAL AND LAND CLEARING WASTE land disturbance 1. Never bury or burn waste. Place litter and debris in approved waste containers. (a) Perimeter dikes, 2. Provide a sufficient number and size of waste containers(e.g dumpster,trash CONCRETE WASHOUTS swales,ditches,and 7 None receptacle)on site to contain construction and domestic wastes. perimeter slopes 1. Do not discharge concrete or cement slurry from the site. 3. Locate waste containers at least 50 feet away from storm drain inlets and surface 2. Dispose of,or recycle settled,hardened concrete residue in accordance with local (b) High Quality Water waters unless no other alternatives are reasonably available. (HqW)Zones 4. Locate waste containers on areas that do not receive substantial amounts of runoff 3. Manage washout from mortar mixers in accordance with the above item and in (c) Slopes steeper than If slopes are 10'or less in length and are from upland areas and does not drain directly to a storm drain,stream or wetland. addition place the mixer and associated materials on impervious barrier and within 3:1 7 not steeper than 2:1,14 days are 5. Cover waste containers at the end of each workday and before storm events or lot perimeter silt fence. allowed provide secondary containment. Repair or replace damaged waste containers. 4. Install temporary concrete washouts per local requirements,where applicable. If an -7 days for slopes greater than 50'in 6. Anchor all lightweight items in waste containers during times of high winds. alternate method or product is to be used,contact your approval authority for length and with slopes steeper than 4:1 7. Empty waste containers as needed to prevent overflow. Clean up immediately if review and approval. If local standard details are not available,use one of the two -7 days for perimeter dikes,swales, containers overflow. types of temporary concrete washouts provided on this detail. (d) Slopes 3:1 to 4:1 14 ditches,perimeter slopes and HQW 8. Dispose waste off-site at an approved disposal facility. 5. Do not use concrete washouts for dewatering or storing defective curb or sidewalk Zones 9. On business days,clean up and dispose of waste in designated waste containers. sections. Stormwater accumulated within the washout may not be pumped into or -10 days for Falls Lake Watershed discharged to the storm drain system or receiving surface waters. Liquid waste must -7 days for perimeter dikes,swales, PAINT AND OTHER LIQUID WASTE be pumped out and removed from project. (e) Areas with slopes p paint ditches,perimeter slopes and HQW Zones 1. Do not dump and other liquid6. Locate washouts at least 50 feet from storm drain inlets and surface waters unless it can be shown that no other alternatives are reasonably available. At a minimum,waste into storm drains,streams or wetlands. flatter than 4:1 14 -10 days for Falls Lake Watershed unless 2. Locate paint washouts at least 50 feet away from storm drain inlets and surface install there is zero slope waters unless no other alternatives are reasonably available. protection of storm drain inlet(s)closest to the washout which could receive spills or overflow. Note:After the permanent cessation of construction activities,any areas with temporary 3. Contain liquid wastes in a controlled area. 7. Locate washouts in an easily accessible area,on level ground and install a stone ground stabilization shall be converted to permanent ground stabilization as soon as 4. Containment must be labeled,sized and placed appropriately forthe needs of site. entrance pad in front of the washout. Additional controls may be required by the practicable but in no case longer than 90 calendar days after the last land disturbing 5. Prevent the discharge of soaps,solvents,detergents and other liquid wastes from approving authority. activity. Temporary ground stabilization shall be maintained in a manner to render the construction sites. 8. ll at least one sign directing concrete trucks to the washout within the project surface stable a ainst accelerated erosion until permanent round stabilization is achieved. Insta PORTABLE TOILETS limits. Post signage on the washout itself to identify this location. GROUND STABILIZATION SPECIFICATION 1. Install portable toilets on level ground at least 50 feet away from storm drains, 9• Remove leavings from the washout when at approximately 75%capacity to limit , Stabilize the ground sufficiently so that rain will not dislodge the soil. Use one of the streams or wetlands unless there is n alternati overflow events. Replace the tarp,sandbags or other temporary structural techniques in the table below: ve reasonably available. If 50 foot components when no longer functional. When utilizing alternative or proprietary offset is not attainable,provide relocation of portable toilet behind silt fence or place products,follow manufacturer's instructions. Temporary Stabilization Permanent stabilization on a gravel pad and surround with sand bags. 10. At the completion of the concrete work,remove remaining leavings and dispose of •Temporary grass seed covered with straw or • Permanent grass seed covered with straw or 2. Provide staking or anchoring of portable toilets during periods of high winds or in high in an approved disposal facility. Fill pit,if applicable,and stabilize any disturbance other mulches and tackifiers other mulches and tackiflers foot traffic areas. • Hydroseeding •Geotextile fabricssuch as permanent soil 3. Monitor portable toilets for leaking and properly dispose of any leaked material. caused by removal of washout. • Rolled erosion control products with or reinforcement matting Utilize a licensed sanitary waste hauler to remove leaking portable toilets and replace without temporary grass seed • Hydroseeding with properly operating unit. • Appropriately applied straw or other mulch • Shrubs or other permanent plantings covered HERBICIDES,PESTICIDES AND RODENTICIDES • Plastic sheeting with mulch • Uniform and evenly distributed ground cover EARTHEN STOCKPILE MANAGEMENT 1. Store and apply herbicides,pesticides and rodenticides in accordance with label sufficient to restrain erosion 1. Show stockpile locations on plans. Locate earthen-material stockpile areas at least restrictions. • structural methods such as concrete,asphalt or 50 feet away from storm drain inlets,sediment basins,perimeter sediment controls 2. Store herbicides,pesticides and rodenticides in their original containers with the retaining walls and surface waters unless it can be shown no other alternatives are reasonably label,which lists directions for use,ingredients and first aid steps in case of • Rolled erosion control roducts with rass seed available. accidental poisoning. 2. Protect stockpile with silt fence installed along toe of slope with a minimum offset of 3. Do not store herbicides,pesticides and rodenticides in areas where flooding is POLYACRYLAMIDES(PAMS)AND FLOCCULANTS five feet from the toe of stockpile. possible or where they may spill or leak into wells,stormwater drains,ground water 1. Select flocculants that are appropriate for the soils being exposed osed during 3. Provide stable stone access point when feasible. or surface water. If a spill occurs,clean area immediately.construction,selecting from the NC DWR List of Approved PAMS/Flocculants. 4. Stabilize stockpile within the tmeframes provided on this sheet and in accordance 4. Do not stockpile these materials onsite. 2. Apply flocculants at or before the inlets to Erosion and Sediment Control Measures. with the approved plan and any additional requirements. Soil stabilization is defined 3. Apply flocculants at the concentrations specified in the NC DWR List ofApproved as vegetative,physical or chemical coverage techniques that will restrain accelerated PAMS/Flocculants and in accordance with the manufacturer's instructions. erosion on disturbed soils fortemporary or permanent control needs. HAZARDOUS AND TOXIC WASTE 4. Provide ponding area for containment of treated Stormwater before discharging 1. Create designated hazardous waste collection areas on-site. offsite. 2. Place hazardous waste containers undercover or in secondary containment. S. Store flocculants in leak-proof containers that are kept under storm-resistant cover tj y: NORTH CAROLI NA 3. Do not store hazardous chemicals,drums or bagged materials directly on the ground. or surrounded by secondary containment structures.'Environmental Quality NCGOI GROUND STABILIZATION AND MATERIALS HANDLING EFFECTIVE: 04/01/19 PART 111 PART III PART III SELF-INSPECTION,RECORDKEEPING AND REPORTING SELF-INSPECTION,RECORDKEEPING AND REPORTING SELF-INSPECTION,RECORDKEEPING AND REPORTING SECTION A:SELF-INSPECTION SECTION B:RECORDKEEPING SECTION C:REPORTING Self-inspections are required during normal business hours in accordance with the table 1.E&SC Plan Documentation 1.Occurrences that Must be Reported below. When adverse weather or site conditions would cause the safety of the inspection The approved E&SC plan as well as any approved deviation shall be kept on the site. The Permittees shall report the following occurrences: personnel to be in jeopardy,the inspection may be delayed until the next business day on which it is safe to perform the inspection. In addition,when a storm event of equal to or approved E&SC plan must be kept up-to-date throughout the coverage under this permit. (a) Visible sediment deposition in a stream or wetland. greater than 1.0 inch occurs outside of normal business hours,the self-inspection shall be The following items pertaining to the E&SC plan shall be kept on site and available for performed upon the commencement of the next business day. Any time when inspections inspection at all times during normal business hours. (b) Oil spills if: were delayed shall be noted in the Inspection Record. Item to Document Documentation Requirements . They are 25 gallons or more, Frequency (a) Each E&SC measure has been installed Initial and date each E&SC measure an a copy • They are less than 25 gallons but cannot be cleaned up within 24 hours, Inspect (during normal Inspection records trust Include: and does not significantly deviate from the of the approved E&SC plan or complete,date business hours locations,dimensions and relative elevations and sign an inspection report that lists each • They cause sheen on surface waters(regardless of volume),or ni Rain gauge Daily Daily amounts. shown on the approved E&SC plan. E&SC measure shown on the approved E&SC maintained InI If R no daily rain gauge observations are made during weekend or They are within 300 feet of surface waters(regardless of volume). good working holiday periods, and no individuafday rainfall information is plan. This documentation is required upon the order available,record the cumulative rain measurement for those un- Initial installation of the E&SC measures or if attended days (anc this will determine if a site inspection is the E&SC measures are modified after initial (c) Releases of hazardous substances in excess of reportable quantities under Section 311 needed). Days on which no rainfall occurred shall be recorded as installation. of the Clean Water Act(Ref:40 CFR 110.3 and 40 CFR 117.3)or Section 102 of CERCLA `zero." The permlime may use another rain-monitoring device approved by the Division. (b) A phase of gading has been completed. Initial and date a copy of the approved E&SC (Ref:40 CFR 302-4)Or G.S.143-215.85. (2) E&SC At least once per 1. Idendficauon of the measures inspected, plan or complete,date and sign an Inspection Measures 7 calendar days 2. Date and time of the inspection, report to indicate completion of the (d) Anticipated bypasses and unanticipated and within 24 3. Name of the person performing the inspection, construction phase. p bypasses. hours of is rain 0. Indication of whether the measures were operating event,1.0 inch In properly, (c) Ground cover is located and installed Initial and date a copy of the approved F&SC 24 hours S. Description of maintenance needs for the measure, in accordance with the approved E&SC plan or complete,date and sign an inspection (e) Noncompliance with the conditions of this permit that may endanger health or the 6. Descriptln,evidence,and date of corrective actions taken. plan. report to indicate compliance with approved environment. (3)sto rmwater At least once per L Identification of Me discharge outtalk inspected, ground cover specification. discharge 7calendar days 2. Date and time of the inspecdoq - ---- ----- -.---. -___._ __._ oudalls(SDC,) and within 24 3. Name of the person performing the inspection, (d) The maintenance and repair Complete,date and sign an inspection report. 2.Reporting Timeframes and Other Requirements hours of a rain 4. Evidence of indicators of stmrmwater pollution such as oil requirements for all E&SC measures event,1.0 inch in sheen,floating or suspended solids or discoloration, have been performed. After a permittee becomes aware of an occurrence that must be reported,he shall contact 24 hours S. Indication of visible sediment leaving the site, the appropriate Division regional office within the timefames and in accordance with the 6. Description,evidence,and date of corrective actions taken. (e) Corrective actions have been taken Initial and date a copy of the approved E&SC (4)Perimeter of At IeaSt oMC plan or complete,date and sign an inspection other requirements listed below. Occurrences outside normal business hours may also be per If visible sedimentation is found outside she limits,then a record to E&SC measures. site 7 calendar days of the following shall be made: report to indicate the completion of the reported to the Department's Environmental Emergency Center personnel at(800) and within 24 1. Actions taken to dean up or stabilize the sediment that has left corrective action. 858-0368. hours of a rain the site limits, event,1.0 inch in 2. Description,evidence,and date of corrective actions taken,and 2.Additional Documentation to be Kept on Site oCCYrteMe Reporting Tim lfromes(Attar Discovery)and Other Requirements 24 hours 3. An explanation as to the actions taken to control future In addition to the E&SC plan documents above,the following items shall be kept on the (a)Visible sediment • WttMn Z4 hours,an oral or electronic notification. releases. site and available for inspectors at all times during normal business hours,unless the deposition in a IS)Streams or At least once per If the stream or wetbnd has Increased visible sedimentation or a • wfdo 7calendar days,a report that contains a description of the wetlands omite 7 calendar days stream has visible increased turbidity from the construction Division provides a site-specific exemption based on unique site conditions that make stream or wetland sediment and actions taken to address the cause of the deposition. or offsite and within 24 activity,then a record of the following shag be made: this requirement not practical: Division staff may waive the requirement for a written report on a (where hours of a rain 1. Description,evidence and date of corrective actions taken,and case-by-case basis. accessible) event,1.0 Inch in 2. Records of the required reports to the appropriate Division (a) This General Permit as well as the Certificate of Coverage,after it is received. • If the stream is named on the NC 303(d)list as impaired for sediment- 24 hours Regional Office per Part III,Section C,Item(2)(a)of this permit related causes,the permittee may be required to perform additional (6)Ground After each phase L The phase of grading fimm tation of perimeter E&SC sta silcabon otgrading measures,clearing and grubbing,installation of storm (b) Records of inspections made during the previous twelve months. The permittee shall monitoring,inspections or apply more stringent practices if staff measures drainage fadlitle;completion of a0landdirturbirtg record the required observations on the Inspection Record Form provided by the determine that additional requirements are needed to assure compliancei t tae m activity,construction or redevelopment,permanent Division or a similar inspection form that includes all the required elements. Use of with the federal or s paired-waters conditions. ground cover). electronicall -available records In lieu of the required paper copies Will be allowed If (b)Oil spills and • Wi bin 24 hours,an oral or electronic notification. The notification 2. Documentation that the required ground stabilization Y p p release of shall include information about the date,time,nature,volume and measures have been provided within the required shown to provide equal access and utility as the hard-copy records. hazardous location of the spill or release. time Name si le.assurance that they will be provided as soon as possible. 3.Documentation to be Retained for Three Years substances per Item All data used to complete the a-NOI and all inspection records shall be maintained for a period 2fti above NOTE:The rain inspection required inspection requirement. of three (c)Anticipated Areportatlecuttelldaysbe)orerhedaeeo)drebypau,ypossfwe. P 4 y p q years after project completion and made available upon request[40 CFR 122.41) bypasses(40 CFR The report shall include an evaluation of the anticipated quality and 122.41(m)(3)] effect of the bypass. _ PART It,SECTION G,ITEM(4) (d)Unanticipated • Wiewn 22q hours,an Dral a electronic rotiRcation. DRAW DOWN OF SEDIMENT BASINS FOR MAINTENANCE OR CLOSE OUT bypasses[40 CFR • VWtMn 7colendor days,a report that includes an evaluation of the 122.41(m)(3)] quality and effect ofthe bypass. (e)Noncompliance • Wf[hln 24 hours,an oral or electronic notification. Sediment basins and traps that receive runoff from drainage areas of one acre or more shall use outlet structures that withdraw water from the surface when these devices need to be drawn down with the conditions . Within 7 calendar days,a report that contains a description of the for maintenance or close out unless this is infeasible. The circumstances in which it is not feasible to withdraw water from the surface shall be rare(for example,times with extended cold weather). of this permit that noncompliance,and its causes;the period of noncompliance, Non-surface withdrawals from sediment basins shall be allowed only when all of the following criteria have been met: may endanger including exact dates and times,and if the noncompliance has not health or the been corrected,the anticipated time noncompliance is expected to (a) The E&SC plan authority has been provided with documentation of the non-surface withdrawal and the specific time periods or conditions in which it will occur. The non-surface withdrawal environment[40 continue;and steps taken or planned to reduce,eliminate,and shall not commence until the E&SC plan authority has approved these items, CFR 122.41(IK7)] prevent reoccurrence of the noncompliance.[40 CFR 122A1(I)(6). • Division staff may waive the requirement for a written report on a (b) The non-surface withdrawal has been reported as an anticipated bypass in accordance with Part III,Section C,Item(2)(c)and(d)of this permit, case-by-case basis. (c) Dewatering discharges are treated with controls to minimize discharges of pollutants from stormwater that is removed from the sediment basin. Examples of appropriate controls include properly sited,designed and maintained dewatering tanks,weir tanks,and filtration systems, (d) Vegetated,upland areas of the sites or a properly designed stone pad is used to the extent feasible at the outlet of the dewatering treatment devices described in Item(c)above, - <; (e) Velocity dissipation devices such as check dams,sediment traps,and riprap are provided at the discharge points of all dewatering devices,and fsY�{ t NORTH CAROLI NA (I) Sediment removed from the dewatering treatment devices described in Item(c)above is disposed of in a manner that does not cause deposition of sediment into waters of the United States. `t n Environmental Quality \, =-' NCG01 SELF-INSPECTION, RECORDKEEPING AND REPORTING EFFECTIVE: 04/01/19