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HomeMy WebLinkAboutWQCS00002_NOV-2024-DV-0269_2024071500 0 00 !0� SCANNED Raleigh Water July 15", 2024 Vanessa Manuel, Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NCDE=Q 1628 Mail Service Center Raleigh, NC 27699-1628 Re: Response to NOV-2024-DV-0269 Sanitary Sewer Overflows — May 2024 Permit No. WQCS00002 Dear Mrs. Manuel: Please allow this letter to respond to the Notice of Violation document (NOV-2024-DV-0269) dated June 13th, 2024, and received by Raleigh Water on June 25th, 2024. This document contains the narrative regarding the pending Notice of Violation action of 3 Sanitary Sewer Overflow (SSO) incidents reported during May 2024 within the City of Raleigh Collections System [1]. This document also provides exhibits to prove our efforts to mitigate the sewer incident. The noticed incidents occurred while the City operated its collection system, according to WQCS00002, dated June 06th, 2017. The permit includes the language outlined in footnote one and applies to the SSOs upon which NOVs with the notice of intent (NOV-NOI) were based. This document will establish a reasonable explanation of the actions taken to stop the spills, contain the released untreated wastewater, collect the wastewater and reintroduce it to the collection system; and finally, restore the possible environmental impacts brought by the release of the SSO incident, listed with the intended NOV-NOI action. Please find below the additional information requested for the SSO incident. 1. "The Director may take enforcement action against the Permittee for SSOs that must be reported to the Division as stipulated in Condition IV92). This includes SSOs that were caused by severe natural conditions or exceptional events unless the Permittee demonstrates through properly signed, contemporaneous operating logs or other relevant evidence that; [a.] The sso was caused by severe natural conditions; there were no feasible alternatives to the sso, such as the use of auxiliary treatment facilities, retention of untreated wastewater, reduction of inflow and infiltration, use of adequate backup equipment, or an increase in the capacity of the system. This provision is not satisfied if, in the exercise of reasonable engineering judgment, the Permittee should have installed auxiliary or additional collections system components, wastewater retention or treatment facilities, adequate backup equipment, or should have reduced inflow and infiltration or [b.i The 550 was exceptional, unintentional, temporary, and caused by factors beyond the reasonable control of the Permittee; the SSO could not have been prevented by the exercise of reasonable control, such as proper management, operation, and maintenance; adequate treatment or collection facilities or components (e.g., adequately enlarging treatment of collection facilities to accommodate growth or adequately controlling and preventing infiltration and inflow[; preventative maintenance; or installation of adequate backup equipment;" Incident Number # 202400855 — 5/3/2024 —10320 Globe Road, Morrisville, NC, 27560 This incident was neither willful nor intentional; it was identified during a site assessment in which dry paper debris (consistent with untreated wastewater debris) was recognized to have been discharged around a sewer manhole connected to a 30-inch sewer gravity main. The identified debris field was consistent with accumulating approximately 5,498 gallons of untreated wastewater without evidence that the flow reached surface waters. The root cause of this event was not identified, as the connecting sewer main was flowing as designed during the initial response. The specific timeframe of this incident was not determined. The incident was recorded within the Little Brier Basin (see exhibit 1—Area of Operation) The restoration of this operation consisted of mechanical removal of sediments from the topsoil. The area around the manhole was cleared of debris, treated with lime, and restored with wood chips for natural coverage. Exhibit 2 - Restoration Effort. The cost associated with mitigating this incident amounted to $10,558.54. The approximate cost to the Utility to treat 5,498 gallons of wastewater would have been $8.24. Raleigh Water saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of sewage had no spill occurred. Furthermore, Raleigh Water still had to pay to treat the greater volume of sewage created by the spill. This section of the collection system is located downstream of an industrial /commercial area. The pipe size is designed to self -scour hydraulically, moving debris downstream without requiring conventional flushing cleaning. Within the last ten years, this specific portion of the collection system has yet to experience any 550. Sanitary sewer assets in this area have been routinely maintained. A press release notification was requested to be published in the Raleigh News & Observer as required by NCGS Article 21, Chapter 143.215.1C. See Exhibit 3 — Press release. Exhibit 3 — Press release Raleigh Water Responds to a Sanitary Sewer Overflow on Fdday, May 3,d, 2a2a M appratdemlely 2 3a PM. Raleigh W,ln sLdlware Upon nod9ed of a sam'!ary sewer everflawneer 1g320 Globe Rd-. Mnnisvaa, faC. a_al "ily Responders Mentlaed that a sewn arerAow had —red the rod cause is under hrvosdgadm This Inddent heard aNeded the rwnrvl goo of unhealed waslawelerfro. the 304,oh sewer gravlly road. Th. re.poma.g 9.10 we tairinq an aeaname seepsm mitlgale doe ovnAwrs envlmrunemazlmpad The NoAfi Cerebra Ceparinwal of Emhormenlal Natty. Ohdaian f%tm Raw —. has hean noHRed of New 11— Based g ar inodent assassmerrL it Is satimated that the overflow mq have dscharprl appmaunaldy 5.900 gaaans .f ert awled waslawanr. W kh remained In the nalrral topography and dfd nM reach the stale ssvten welers Resldah¢nfe IN, 'ncident 1, -going • Rafelo Water has an agg—Na edbwbn and erA—menl onaTam to I. M he &a6.ge of grease d h,8. vAp. rage, diapma and other krrpropa• materials In the sower system and to lake eMmce M action where npgopdam 11 Mesa Bare make a into the sewer system Meg may "me a spill *kh ran have an ad —impact an warn w.kly and endanger Urn.. who cone has comes Ydffi d1e effeaed arai9 • Waterhuman want., and Ickal ti are the only items perrAed to ire da ,rd Isla Ure Soper Syslem. All nrher h.rrb pe 4aaTe damu]. la R. sewer sy.tam and are ..I pematted II you e.pe"—eaoesetae sewer smeh ar sne sawm p0ling from manhol.. a plpas. pease cap 919-996-12451. '.pod immaa.lag For mare krfarm-lion eb.A how you can help pravam 1111A.V firer spills pleaoe v{vl raleighno geVAYas. This nets rekes. is regrlred by NCGS A16:1.21, M ptar 1 d321SAC Before this incident, maintenance records show that sections within the zone of influence of this collection system were assessed within the last ten years as follows: Flushing CCTV Repair Easement Inspections Activities Maintenanc activities Activities Activities a Activities Manhole Sewer High -Priority Inspection Inspection 5/4/2024 5/3/2024 5/20/2024 12/7/2022 9/27/2017 11/15/2017 8/6/2020 4/13/2023 9/28/2017 11/16/2017 9/16/2020 5/29/2024 9/29/2017 11/17/2017 10/19/2020 6/28/2024 5/11/2021 5/3/2018 4/9/2021 5/12/2021 9/26/2018 10/6/2021 3/14/2022 9/26/2018 10/12/2021 12/28/2023 9/28/2018 3/14/2022 10/2/2018 10/14/2022 10/12/2018 10/17/2022 5/8/2019 3/27/2023 5/9/2019 7/11/2023 10/31/2019 7/19/2023 3/30/2020 3/27/2024 3/30/2020 It's important to reiterate that no additional sewer issues have been associated with this section of the collection system since the last sewer incident. This positive progress is a testament to the effectiveness of our maintenance efforts, making this site an active maintenance spot pending the completion of further CCTV assessment, sewer main cleaning, and chemical root control application. Incident Number # 202400944 — 5/16/2024— 7401 Sandy Creek Dr., Raleigh This spill was neither willful nor intentional; it resulted from root intrusion, which blocked a portion of an 8-in gravity sewer main. The root intrusion led to a sewer spill of approximately 2,600 gallons of untreated wastewater reaching an unnamed tributary within the Mine Basin (see exhibit 1—Area of Operation) On 5/16/24, at approximately 6:45 PM, Raleigh Water staff responded to a sanitary sewer overflow emanating from a sanitary sewer manhole (affected sewer asset SMH127474, see exhibit 2 - Affected Asset / Root Intrusion) located near 7401 Sandy Creek Dr., Raleigh, NC. The responding staff took all reasonable steps to stop and mitigate the impact of the discharge, gaining control of the spill incident by 8:20 PM on the same day. Crews utilized hydraulic jetting to remove the source of the blockage within the affecting asset, thus restoring sewer flow. Exhlbit 2 - Affected Asset / Ront Intruslon 4 Containment and collection of this spill incident consisted of employing a temporary spill containment site downstream of the affected area, restricting sewer flow to downstream surface waters. This approach was intended to contain wastewater flow and minimize the environmental impact on the surrounding land. Responding crews employed pumps at the temporary containment site to recover flushed wastewater and any evidence of sewer completing the operation by reintroducing the wastewater to the collection system. This spill was contained without a significant environmental impact on the adjacent area and its natural resources. Visual inspection of the affected area and downstream waters confirmed no fish kill or unnecessary vegetative damage. During the restoration phase of the operation, crews utilized ample potable water to flush the affected area and remove sewer traces from the surrounding area and downstream conveyance. The area around the manhole was cleared of debris, treated with lime, and restored with grass seed and straw. See Exhibit 3 — Restoration Efforts. Exhibit 3 — Restoration Efforts The cost associated with the mitigation of this incident amounted to $5,793.60. The approximate cost to the Utility to treat 2,600 gallons of wastewater would have been approximately $3.90. Raleigh Water saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of sewage had no spill occurred. Furthermore, Raleigh Water still had to pay to treat the greater volume of sewage created by the spill. This section of the collection system is located downstream of a residential area. It provides sewer collection services to several residences surrounding the spill incident. Within the last ten years, this specific portion of the collection system has not experienced a root intrusion SSO. Sanitary sewer assets in this area have been routinely maintained with subsequent chemical root control treatment. A press release notification was requested to be published in the Raleigh News & Observer as required by NCGS Article 21, Chapter 143.215.1C. See Exhibit 5 — Press release. 5 Exhibit 5 — Press Release Raleigh Water Responds to a Sanitary Sewer Overflow On Thursday, May 16th, 2024, at approximately 6 45 PM, Raleigh Water staff were notfied of a sanitary sewer overflow near 7401 Sandy Creek Dr., Raleigh_ NC. Upon arrival, Utility Responders identified an active sewer overflow from a sewer manhole. affecting the normal flow of untreated wastewater from the connecting sewer gravity main The responding staff took all reasonable steps to mitigate the overflow's environmental impact. The North Carolina Department of Environmental Quality, Division of Water Resources, has been notified of the overflow, Based on a site assessment it was estimated that the overflow may have discharged approximately 2 600 gallons of untreated wastewater. reaching the surface waters of an unnamed tributary within Mine Basin No vegetative damage or fish kill was observed related to this event Restoration for the Incident was completed on the same day • Raleigh Water has an aggressive education and enforcement program to prevent the discharge of grease, debris. wipes. rags. diapers and other improper materials in the sewer system and to take enforcement action where appropriate. If these Items make fl into the sewer system, they may cause a spill which can have an adverse impact on water quality and endanger those who come into contact with the affected areas. • Water, human waste, and toilet tissue are the only items permitted to be discharged into the sewer system An other items will cause damage to the sewer system and are not permitted_ • If you experience excessive sewer smells or see sewer spilling from manholes or pipes please call 919-996-3245 to report Immediately_ • For more Information about how you can help prevent sanitary sewer spills. please visit raleighnc govhvater. This news release is required by NCGS Article 21, Chapter 143.215.1C. Before this incident, maintenance records show that sections within the zone of influence of this collection system were assessed within the last ten years as follows: Flushing activities 10/26/2017 10/9/2018 8/29/2019 9/3/2019 9/4/2019 9/5/2019 9/6/2019 5/20/2024 5/21/2024 6/20/2024 Easement Inspection 11/14/2022 12/30/2022 4/26/2023 5/16/2023 6/5/2023 Manhole Inspection 11/24/2020 12/14/2020 Inspections Activities Sewer High Priority Inspection 1/10/2018 4/19/2021 4/25/2018 8/30/2021 9/27/2018 4/5/2022 9/28/2018 9/16/2022 3/21/2019 3/1/2023 3/29/2019 7/26/2023 8/16/2019 11/2/2023 1/23/2020 1/24/2024 10/21/2020 4/15/2024 CCTV Activities 3/9/2017 2/22/2023 6/28/2024 7/11/2024 Easement Maintenance Activities 7/26/2023 5/4/2023 5/5/2023 5/8/2023 5/9/2023 5/10/2023 Repair Operations 1/28/2021 Since the last sewer incident, no additional sewer issues have been associated with this section of the collection system. This site remains an active maintenance spot pending the completion of further sewer main cleaning and chemical root control application. The "Zone of Influence" below was identified for further chemical root control. Incident Number # 202400949 — 5/17/2024 — 7104 Great Laurel DR. Raleigh This spill was neither willful nor intentional; it resulted from a short circuit interruption that caused a momentary shutdown of power, causing both pumps to stop generating a sanitary sewer overflow of approximately 500 gallons of untreated wastewater outside of the confines of the station's wet well. On the night of 05/17/2024, Raleigh Water's SCADA (supervisory control and data acquisition) recorded a high wet well alarm from pump station #40-Brighton PS, located at 7104 Great Laurel Dr, Raleigh. Responding crews arrived on -site on the same day and found that both pumps had tripped an overloaded breaker. The responding staff took all reasonable steps to stop and mitigate the impact of the discharge as soon as they arrived, gaining control of the spill incident by 09:12 AM on the same day. To mitigate the incident, responding crews utilized a vacuum truck to keep the flow of untreated wastewater below spill levels and within the station's wet wells. Crews immediately re-established electrical power and returned the pump to operation without damaging the electrical components. Restoration of this spill event consisted of washing the land surrounding the station. Sewer debris and solids were collected and disposed of accordingly. Crews utilized ample potable water to flush the affected area. This spill was contained without a significant environmental impact on the adjacent area and its natural resources. Visual inspection of the affected area and downstream waters confirmed that no fish kill or unnecessary vegetative damage occurred. This event resulted in the approximate loss of 500 gallons of untreated wastewater to reach an unnamed tributary within Neuse Basin. The cost associated with mitigating this event was $1,482.68. The approximate cost to the utility to treat 500 gallons of wastewater would have been approximately $.75. The City saved no money from this spill. Its costs for cleanup exceeded the cost of treating the volume of sewage had no spill occurred. Furthermore, the City still had to pay for treating the greater volume of sewage created by the spill. There has been no history of asset failures associated with this Sewer Network Structure. No additional issues have been associated with this section of the collection system since the last sewer event. The station continues to be assessed to ensure no other malfunctions occur. Incident Number # 202401026 — 5/31/2024 — 5265 Six Forks Rd., Raleigh This incident was not an event experienced within the Raleigh Collection System. No work record or call in our database indicates a collections system's SSO at this location on this date. A Basin -wide Incident Management Report was initiated but not by Raleigh Water representatives. The report offered no information about the incident, the incident's impact, volume, or specific timeline. We request that this incident be stricken for our records as no SSO event is associated with the public infrastructure maintained by Raleigh Water at this address. Summary The Sewer Maintenance Division of Raleigh Water strives to develop initiatives that improve operational reliability to meet customer expectations and meet or exceed the Water Quality Collection System permit requirements. Our operations are focused on continual improvement, the prevention of pollution, and increased environmental performance efficiency. This endeavor is noted as the Division operates an ISO Certified Environmental Management System governed by the 14001-2015 Standards. As part of these initiatives, the Division operates a comprehensive reactive and preventive maintenance program to maintain over 2,644 miles of sanitary sewer pipe and minimize the accidental release of untreated wastewater. Since July 2023 (Fiscal Year 2024), the Utility has maintained approximately 1,420 [1] miles of gravity sewer mains by flushing with hydraulic jetting, conducting CCTV assessments, and performing repair operations, easement maintenance, and inspections. The fiscal year-to-date cost of these operations amounts to $2,735,282.91 [2], approximately 2% of the Division's annual operating budget. The mitigation of the 8,598 gallons of untreated wastewater identified as notice of violations in this letter cost the Utility approximately $17,834.82. The City's cost of sewer treatment per gallon is $.0015 [3]. At this rate, treating the untreated wastewater spilled would cost the City $12.89. The City saved no money from these spills. The mitigation costs well exceeded the cost of treating the volume of sewage had no spill occurred. Furthermore, the city still had to pay to treat the greater sewage volume created by these spills. This fiscal comparison shows the City's commitment to environmental protection, sparing no cost regardless of the spill incident's severity and complexity. The City continues demonstrating due diligence in environmental performance by allocating resources to a spill incident regardless of the associated cost. This effort is noted in the City's SSO performance rate of 2.00 total SSO rate [4) per 100 miles of pipe, compared to the Southeastern Region of the U.S., of 7.0 spills per 100 miles of line. [1] 1,420 miles represents approximately 54% of the entire sanitary sewer coliection system [2] Associated operational cost year to date for FY2024 OPERATION LINEAR FEET Linear Miles COST CCTV 585,531 Ill $341,318.75 Repair 4,260 .80 $1,430,784.85 Flushing 2,334,592 442 5699,743.41 Easement 578,116 109 $263,435.90 Easement Inspection 3,995,104 757 N/A Total- 7,498,603 Ft / 1,420 MILE5 The total cost of Business to Date is $2, 735, 282.91 j3] F.Y. 2024 annual Divisional budget- $15,058,291 [4] $.o015 is based on the annual water treatment operating cost compounded by the total treated effluent. [5] The current 550 Rate for F.Y. 24 is 2.00 Note In FY-2023, the Raleigh Water -Sewer Maintenance Division spent $2,054,254.45 in operations to maintain, repair, and inspect approximately 939.95 miles of sanitary sewer infrastructure. Additionally, the City of Raleigh Assistant Public Utility Directors and Collections System staff have become involved in challenging the nonwoven fabrics industry standards to better inform consumers of these products and their detrimental effects on the collections systems. PUD staff has personally met with officers of INDA, the leading association of the nonwoven fabrics industry based in Cary, NC, to communicate our concerns about these fabrics, the current industry standards, and better education for the consumer. PUD has also joined forces 0 with other utilities nationwide through the National Association of Clean Waters Agencies (NACWA), the Water Environment Foundation (WEF), and the American Public Works Association (APWA) to challenge INDA and current industry standards, recognizing that they do not support compatibility in sanitary sewer collections systems nationally. These agencies work collectively to challenge the testing protocols, assessment guidelines, and consumer education and labeling of these non -dispersible. Raleigh Water has an aggressive educational outreach initiative to address illicit discharges to commercial and residential users, such as wipes, fats, oil, and grease. Raleigh Water has developed a complimentary property managers resource kit that provides best practice resources for establishing a property -specific awareness program. Each kit contains brochures and complimentary gadgets to help residents manage grease and fat collection and disposal. The resource kit also features a multimedia flash drive with videos and reproducible educational material that property managers can use to educate tenants to reduce the risk of sewer backups caused by the introduction of solids through their residential piping. Each kit costs Raleigh Water approximately $85.00 to produce and is provided free of charge to the property management. Raleigh Water continuously develops initiatives to increase residential and commercial customer partnerships to address grease accumulation and prevent illicit incident discharges. The educational material and videos can be accessed through social media and the Raleigh Water website: https://raleighnc.gov/sewer-maintenance The City continues its monetary reward or bounty program, which pays out fifty ($50) to any citizen who observes and reports an SSO or conditions that may cause a spill incident. This program has been advertised via printed material, a television advertisement campaign, and graphic design "wraps" on Sewer Maintenance vehicles. These graphics on our vehicles function as mobile billboards, spreading our prevention message and offering contact information throughout the service area daily. This program was developed hoping that citizens and customers would become more aware of the signs of an emerging system problem causing the SSO occurrence and become proactive in helping the City prevent these occurrences. Additionally, all customers are notified via their water and sewer utility bills not to discharge materials that could block the flow of the sanitary sewer mains. The City also circulates information regarding grease discharge into the sewer system and the effects of such deposits. Whenever possible, and upon investigating the root cause of a spill incident, PUD Code Enforcement officers develop and send registered informational letters about the spill incident to the customer base serviced by the line where the SSO has occurred. This educational outreach is done to educate our customers on the proper use of sanitary sewers to prevent the disposal of non-flushable items and items harmful to the continuous operation of the collections system. On behalf of the City of Raleigh, I am requesting that the NOV-2024-DV-0269 issued for May 2024 be fairly reviewed, considering the steps the Department has taken to protect the environment and meet or exceed the requirements of the Collections System Permit. If additional information is required, don't hesitate to contact Matthew Vessie, Sewer Maintenance Superintendent, at (919) 996-2312 or Carlos M. Perez, ORC, Assistance perintendent, 919-996-5929. inc4reiy, Co! Carlos M Perez, ORC Assistance Superintendent, Sewer Maintenance Division City of Raleigh, Public Utilities Department P.O. Box 590 Raleigh, NC 27602-0590 919-996-5929 office 919-278-6020 cell Carlos.perezcamacho@raleighnc.Gov 10 DocuSign Envelope ID: AEA9BC1MC244C01-8291-6742371862B7 JUN 2 5 2024 ROY COOPER ELIZABETH S. BISER RICHARD E. IZDGERS,.JR, ihn+ I -a Certifier! Mail # 7017 0190 0000 2486 1022 Return Receipt Requested Whit Wheeler, Assistant Director City of Raleigh PO Box 590 Raleigh, NC 27602-0590 rnvironmrnraf Quuliry June 13, 2024 SUBJECT: NOTICE OF VIOLATION & INTENT TO ISSUE CIVIL PENALTY Tracking No.: NOV-2024-DV-0269 Sanitary Sewer Overflows - May 2024 Collection System Permit No. WQCS00002 Raleigh Collection System Wake County Dear Mr. Wheeler: A review has been conducted of the self -reported Sanitary Sewer Overflows (SSO's) 5-Day Report/s submitted by City of Raleigh. The Division's Raleigh Regional Office concludes that the City of Raleigh violated Permit Condition I (2) of Permit No. WQCS00002 by failing to effectively manage, maintain, and operate their collection system so that there is no SSO (Sanitary Sewer Overflow) to the land or surface waters and the SSO constituted making an outlet to waters of the State for purposes of G.S. 143-215.1(a)(1), for which a permit is required by G.S. 143-215.1. The Raleigh Regional Office is providing the City of Raleigh an opportunity to provide evidence and justification as to why the City of Raleigh should not be assessed a civil penalty for the violation(s) that are summarized below: Total Vol Total Surface Incident Start Duration Vol Water Number Date (Mips) Location Cause (Gals) (Gals) DWR Action 202400855 5/3/2024 100 10320 Globe Road, Other 5,498 5,498 Notice of Violation - Morrisville, NC, 27560 Intent to Assess 202400944 5/16/2024 95 7401 SANDY CREEK Roots 2,600 2,600 DRIVE, RALEIGH, 27615 Notice of Violation - Intent to Assess DocuSign Envelope ID: AEA9B01B-9C24-4=-8291-6742371862B7 Total Vol Total Surface Incident Number Start Date Duration (Mins) Location Cause Vol (Gals) Water (Gals) DWR Action 202400949 5/17/2024 64 7104 GREAT LAUREL Pump station 5,000 500 Notice of Violation DRIVE, RALEIGH, equipment failure 27616 202401026 5/31/2024 Unknown 5265 SIX FORKS ROAD, Other 1,000 1,000 Notice of Violation RALEIGH,27609 This Notice of Violation / Notice of Intent to Enforce (NOV/NOI) is being issued for the noted violation. Pursuant to G.S. 143-215.6A, a civil penalty of not more than twenty-five thousand dollars ($25,000.00) may be assessed against any person who violates or fails to act in accordance with the terms, conditions, or requirements of any permit issued pursuant to G.S. 143-215.1. This office requests that you respond to this Notice, in writing, within 10 business days of its receipt. In your response, you should address the causes of non-compliance, remedial actions, and all other actions taken to prevent the recurrence of similar situations. The response to this correspondence will be considered in this process. Enforcement decisions will also be based on volume spilled, volume reaching surface waters, duration and gravity, impacts to public health, fish kills or recreational area closures. Other factors considered in determining the amount of the civil penalty are the violator's history of non-compliance, the cost of rectifying the damage, whether the spill was intentional and whether money was saved by non-compliance. If you have any questions, please do not hesitate to contact Kevin Fowler with the Water Quality Section in the Raleigh Regional office at 919-791-4261 or via email at kevin.fowler@deq.nc.gov. Sincerely, I-, DocuSigned by: uAw 'sso, f . h d — 82916EOA832144F Vanessa Manuel, Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NCDEQ Cc: Laserfiche