Loading...
HomeMy WebLinkAboutNC0079057_PLAN OF ACTION_19930422 NPDES DOCUMENT SCANNING COVER SHEET NPDES Permit: NC0079057 Manteo WWTP ' Document Type: Permit Issuance ' Wasteload Allocation Authorization to Construct (AtC) Permit Modification Speculative Limits Plan of Action ' Instream Assessment (6713) Environmental Assessment (EA) Permit History Document Date: Aril 22, 1993 This document is printed on reuse paper-ignore any content on the resrerse side • I =, r 1f I � • '.�i� It `.. APR 2 9 1993 t Y State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management 512 North Salisbury Street • Raleigh, North Carolina 27604 James B. Hunt,Jr.,Governor A. Preston Howard,Jr., P.E. Jonathan B. Howes,Secretary Director April 22, 1993 Ms. Sara E. Winslow, Biologist Supervisor NC Division of Marine Fisheries Post Office Box 769 Morehead City, NC 28557-0769 - Subject: NPDES Permit NCO079057 & NPDES Permit`NC0025488 Response to Draft Permit Comments Town of Manteo WWTP Dare County Dear Ms. Winslow: Thank you for your interest in the issuance of the subject NPDES permits for the Town of Manteo. The Division of Environmental Management would like to offer the following in response to the issues you have raised. NPDES Permit NCO025488 is for the renewal of the Town of Manteo's permit for its existing 0.250 MGD wastewater treatment facility. When the town's new facility (NPDES Permit NC0079057) is built the existing facility will cease discharge as the flow will be diverted to the new facility. The existing facility was allowed to continue operation under its current permit limits because the Division feels that it would not be realistic to require the Town of Manteo to upgrade its existing plant when it is proposing to construct a new treatment facility. The Division is aware of opposition to the proposed discharge from the Division of Marine Fisheries due to the proximity to primary nursery areas and SA waters. However, the Town's environmental assessment has indicated that it currently has no feasible alternatives other than a direct discharge to the bay. It should be noted that the proposed facility will accept wastewater Regional Offices Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem 704/251-6208 919/486-1541 704/663-1699 919/571-4700 919/946-6481 919/395-3900 919/896-7007 Pollution Prevention Pays P.O.Box 29535,Raleigh,North Carolina 27626-0535 Telephone 919-733-7015 An Equal Opportunity Affirmative Action Employer Page Two Ms. Winslow from the existing 0.250 MGD facility, its 0.125 MGD rotary distribution system, and a 0.10 MGD discharge from Pirates Cove (also known as Roanoke Properties) thus eliminating these three separate discharges. The proposed facility should be a significant improvement over the treatment capabilities of the existing treatment facility. In spite of the increase in flow, the overall loadings for BODS and ammonia will be reduced, the fecal coliform limit has been reduced from 200.0/100 ml to 14.0/100 ml and a daily maximum total residual chlorine limit of 17 µg/1 was added to the permit. This limit should adequately protect the shrimp and blue crab larvae. In addition to the reduced loading, extensive instr earn monitoring was assigned to the proposed facility including sites in Doughs Creek, Scarboro Creek and in Roanoke Sound, to ensure that the discharge is not causing degradation in these areas that are high quality waters. The new facility will also be required to incorporate a diffuser into the outfall design and the ultimate discharge point will be moved out into the bay for better mixing. The final discharge point was decided upon after consultation with Shellfish Sanitation, the Division of Marine Fisheries and the Division of Environmental Management's Washington Regional Office. The Division has also recommended that the outfall pipe be buried deep enough to prevent damage from trawlers and that the actual outfall be clearly marked based on input from the above agencies. With regard to the comments concerning the proposed upgrade of Shallowbag Bay to Class SA waters, in 1986 the Division received a request from the Town of Manteo for reclassification of Shallowbag Bay from SC to SB waters. In 1988 the town requested that Shallowbag Bay be reclassified from Class SC to Class SA waters. In 1990 the Division informed the Town of Manteo that a reclassification was not possible due to the existing discharge into the bay. The town has indicated that they would pursue a reclassification to SB waters after the new wastewater treatment facility has been put into operation and the existing plant has been dismantled. However, at this time there is no pending reclassification request from the current SC waters classification. The Division hopes that this resolves the concerns that the Division of Marine Fisheries has expressed and we thank you for your efforts and concerns. Please be assured that the Division of Environmental Management will take all necessary steps to ensure that the permit conditions are met and water quality is protected. Again, thank you for expressing your concerns. If you have further questions or comments please feel free to contact Charles M. Lowe of our Water Quality Section at telephone number(919) 733-5083. Sincerely, Steve W. Tedder, Chief Water Quality Section cc: Washington.Regional Office Environmental Sciences Branch Technical Support,.BrahcIV Permits and Engineering Central Files Planning ' - e.wsurt Zn Sl 5 y. a State of North Carolina Department of Environment, Health, and Natural Resources 512 North Salisbury Street • Raleigh, North Carolina 27604 James B. Hunt, Jr., Governor C Ir 4� �j, �" � On 2��5 Jonathan B. Howes, Secretary &0 �u,4v . February 23 , 1993 MEMORANDUM TO: Charles Lowe FROM: Greg Thorpe ] SUBJECT: Review of Division of Marine Fisheries ' Comments and DEM Response Regarding Town of Manteo ' s NPDES Permits Nos. NCO079057 and NCO025488 Planning Branch staff have reviewed the subject correspondence (attached) and offer the following comments. We recognize that Manteo ' s discharge options are limited and that it is , therefore, necessary for the Town to continue to discharge to Shallowbag Bay. We believe that the Division of Marine Fisheries (DMF) has some valid concerns regarding the resources of Shallowbag Bay and the permit conditions .need to reflect the protection of those resources and adjacent High Quality Waters .. The comments from DMF seem to indicate, for example, that whole effluent toxicity limits need to be part of the permit. As Director of DEM, George Everett indicated in his April 16 , 1991 letter to David Lane (attached) that the Town would have an acute toxicity limit in its new permit. Planning Branch staff believe that the permit conditions set forth in George Everett ' s letter, including the acute toxicity limit, are necessary for the protection of Shallowbag Bay and should be included in the permit conditions. ( It is difficult to know which of the conditions described in George ' s letter are or are not included in the permit, since we have reviewed the correspondence only) . Other limits , such as the total residual chlorine limit described by George, are also important for protecting the resources and should address some of DMF' s concerns. The only other comments we have are in the. way of questions raised by DMF' s comments. ( 1 ) It was our understanding that this expansion was going to result in an overall decreased loading to the Bay, based on meeting advanced treatment requirements . Is this not the case? ; P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone 919-733-4984 Fax.i 91 9-73 3-051 3 An Equal Opport niry Affinnatve Acton Employer Charles Lowe February 23 , 1993 Page Two ( 2 ) Did we waive Environmental Assessment requirements because of projected water quality improvements from advanced treatment? ; and ( 3 ) Have all the limits described in George Everett ' s April 16, 1991 memo been incorporated into the permit? If not, which limits were omitted? We would need to know what the actual permit conditions are before we could offer any more meaningful comments. I hope these remarks are helpful. If we can be of further assistance, please let me know. GT/kls Lowe.mem/D-22 Attachments cc: Steve Tedder, w/attachments Dennis Ramsey, w/o attachments Don Safrit, w/o attachments Coleen Sullins, w/o attachments Ken Eagleson, w/o attachments . Trevor Clements, w/o attachments t• FEB 2 4 1993 'i a DIVISION OF ENVIRONMENTAL MANAGEMENT February 19, 1993 MEMORANDUM TO: Charles Lowe v THROUGH: Trevor Clement FROM: Ruth Swanek aC > SUBJECT: Town of Manteo NPDES No. NCO025488 and NCO079057 Dare County I am writing in response to the Division of Marine Fisheries objections to the NPDES permits issued to the Town of Manteo. NPDES Permit NCO025488 is for the renewal of the Town's NPDES permit for its existing W WTP. When the Town's new facility (NC0079057) is built this facility will go off line. Existing permit limits were assigned for the renewal since the Division cannot expect the Town to upgrade its existing plant when it is building a new W WTP. DEM was aware of much opposition to the proposed discharge (including opposition from Marine Fisheries and several DEM staff) due to the proximity to primary nursery areas and SA waters. However, the Town's environmental assessment indicated that it had no other alternatives to discharge. In addition, the proposed facility was going to include the flow from its current 0.25 MGD outfall, its 0.125 MGD rotary distribution system, and the 0.1 MGD Pirates Cove discharge (a.k.a. Roanoke Properties). In light of the above information, the Division decided to permit the proposed discharge with state of the art treatment requirements. The proposed facility should be an improvement over the current discharge. The permitted loading for BOD and ammonia has been reduced, fecal coliform limit has been reduced from 200 /100 ml to 14/100 ml, and a daily maximum total residual chlori.ae limit of 17 ug/I was added. This limit will adequately protect the shrimp and blue crab iarvae. In addition to the reduced loading, extensive instream monitoring was assigned to the proposed facility including sites in Doughs Creek, Scarbon; Creek and in`Roanokd:Sound'to ensiieeifiat the discharge is not causing degradation in these areas whicfi are`tiigh'y'uali'ty waters. The ne•n• facility is also required to have a diffuser and the ultimate discharge point was moved out into the bay for better mixing. The final dischar_qtpoint was decided upon after consultation with Shellfish Sanitation, Division of Marine Fisheries, and DEM's Washington Regional Office. Technical Support also recommended that the outfall pipe be buried deep enough to prevent damage from trowlers and that the actual outfall be clearly marked based on input from the above agencies. These recommendations may have not been incorporated into the final permit. Finally, with regard to Marine Fisheries comment about the proposed upgrade of Shallowbag Bay to SA, Technical Support was informed in 1990 that the Town of Manteo had requested the reclassification and understood that it would not be granted with its dischargers in the bay. The Town had indicated that it was interested in pursuing a reclassification of the bay to SB however. The Planning Branch should have further information regarding this comment. If you need further information, please contact me at extension 503. og� State of North Carolina MICHAEL F. EASLEY Department of Justice All ORNE.Y c.E,NERA1. P.O. BOX 629 RALEIGH 276020629 '^ c-� nT, 6 Co MEMORANDUM TO: Preston Howard, Acting Director Division of Environmental Management FROM: Daniel C. Oakley'YO Special Deputy Attorney General DATE: 18 February, 1993 RE: County of Dare y. DEHNR, Ct. App. No. 9210SC262 Please be advised that the attempted third-party permit appeal of the Town of Nlanteo's NPDES Permit No. NCO079057 has been dismissed by the Court of Appeals oil joint motion of all parties. A similar dismissal will occur in Superior Court, and this permit will be effective. /,DoSafrit vise if you have any questions. /dw cc: :howa An Equal Opportunity/Affirmative Action Employer F'IL D NO. 9210SC262 g; jF.11 23 FFI I* 24 NORTH CAROLINA COURT OF APPEALS OF c COUNTY OF DARE, a Body Polictic and Corporate, Petitioner V COUNTY: Wake NUMBER: 91CVS8811 NORTH CAROLINA DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES, Respondent and RECEIVEn TOWN OF MANTEO, Intervenor-Respondent *********************************** FEB 0 R D E R �'Ii �•A70RNEYGM.T, C�:;rts,acnL l i;;;ecti�n Sec:, ,., The following Order was entered: "The motion filed in this cause on the 21st day of January, 1993 and designated "Joint Motin to Withdraw Appeal and Dismiss Proceeding" is allowed. By order of the Court this 28th day of January, 1993" . And it is considered and adjudged further, that the defenant- appellant, do pay the costs of the appeal in this Court incurred, to wit, the sum of NINE AND N01100 dollars ($9 . 00) , and execution issued therefor. The above order is therefore certified to the Clerk of Superior Court in Wake County, North Carolina. Witness my hand and official seal this the 28th day of January, 1993 . Cle c of the Court of Appeals Orig CSC / cc: Elizabeth E. Rouses/ G. Criston Windham Yvonne C. Bailey R. Christopher Dillon John N. Fountain Carolyn Sprinthall Knaut Dwight H. Wheless Daniel D. Koury Zv .. � No. 9210SC262 NORTH CAROLINA COURT OF APPEALS COUNTY OF DARE, a Body ) Politic and Corporate, ) Petitioner, ) V. ) From Wake County No. 91 CvS 8811 NORTH CAROLINA DEPARTMENT ) OF ENVIRONMENT, HEALTH AND ) NATURAL RESOURCES, ) Respondent, ) and ) TOWN OF MANTEO, ) Intervenor-Respondent. ) M444tii4ii YYY!/!tt!##4t44444i444 SETTLEMENT AGREEMENT !l R4tYii4Yi YYtRRttti!lRtt!##44li This Agreement, made and entered into on the day of January, 1993, by and between County of Dare, a Body Politic and Corporate (hereinafter "Dare County"), the North Carolina Department of Environment, Health and Natural Resources (hereinafter "DEHNR"), and the Town of Mantco, a Municipal Corporation and Body Politic (hereinafter "Mantel'). Whereas, on April 16, 1991, DEHNR issued National Pollution Discharge Elimination System ("NPDES") permit number NCO079057 (hereinafter 'Permit') to Mantco, authorizing construction of new wastewater treatment works and allowing the discharge of wastewater into Shallowbag Bay in the Pasquotank River Basin. Whereas, on May 15, 1991, Dare County filed a petition for a contested case hearing pursuant to N.C. General Statute §15013-23, challenging the issuance of permit number NCO079057 and seeking to have it cancelled. On June 21, 1991, Mantco received permission to intervene in this proceeding. The case is presently before the North Carolina Court of Appeals. Whereas, the parties have resolved all differences between them regarding this matter and wish to enter into settlement upon the following terms and conditions: 1. Dare County will dismiss the instant proceeding with prejudice, and will take all actions necessary to effectuate a complete dismissal of its challenge to the permit. 2. Each party will be responsible for its own costs and attorneys' fees incurred in this proceeding. 3. Manteo and DEHNR will make no claim against Dare County for money damages or other redress based upon its institution of this proceeding or its challenge to the issuance of the permit, so long as Dare County complies with the terms of this agreement. r This the day of January, 1993. Dwight H. Wheless WHELESS & WHELESS Post Office Box 500 Manteo, NC 27954 o n o ntaid YOUNG MOORE HENDERSON & ALVIS P. O. Box 31627 Raleigh, NC 27622 ATTORNEYS FOR DARE COUNTY 2 ATTORNEY GENERAL MICHAEL F. EASLEY 'By Kath o cs Cooper Special DepiWAttorney General Post Office Box 629 Raleigh, NC 27602-0629 ATTORNEY FOR THE NORTH CAROLINA DEPARTMENT OF ENVIRONMENT,HEALTH AND NATURAL RESOURCES Yvo ne C. Bailey, NCSB 9683 WOMBLE CARLYLE SANDRIDGE & CE P. O. Box 831 Raleigh, NC 27602 /I1' II L . r"l.S� W l`yi c�ii a G. Criston Windham, NCSB #7400 WOMBLE CARLYLE SANDRIDGE & RICE Post Office Drawer 84 Winston-Salem, NC 27102 I )cwt'� i Daniel D. Khoury ALDRIDGE SEAWELL & KHOURY Post Office Box 1584 Kill Devil Hills, NC 27948 ATTORNEYS FOR TOWN OF MANTEO w#5s822. 3 9210SC262 NORTH CAROLINA COURT OF APPEALS COUNTY OF DARE, a Body Politic and Corporate, V. COUNTY: Wake NUMBER: 91CVS8811 NORTH CAROLINA DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES, and TOWN OF MANTEO, titttR!ltt,#ltttt„!!!k,!##,#,#tt JOINT MOTION TO WITHDRAW APPEAL AND DISMISS PROCEEDING NOW COMES Dare County, Petitioner-Appellee, North Carolina Department of Environment, Health and Natural Resources, Respondent-Appellant, and the Town of Manteo, Intervenor-Appellant, who jointly move the Court pursuant to Rule 37 of the North Carolina Rules of Appellate Procedure to dismiss the above-entitled proceeding with prejudice, and respectfully state: 1. The parties have reached agreement on all matters in controversy between them involved in the matters presented on appeal and in the underlying proceeding. Further consideration of this matter would result in a waste of judicial resources and needless expenditure of public monies. 2. The issues raised by this appeal are also presented in other cases presently being considered by this Court (see e.g. Citizens for Clean Industry, Inc. and City of Wilmington v. Cobey, No. 9210SC90). The same panel of judges has been assigned all of these cases. Dismissal of this proceeding, therefore, will not prevent determination of the legal issues involved. 3. Each party has agreed to bear its own costs in this matter. WHEREFORE, the parties pray that the Court: 1. Dismiss this matter with prejudice; and 2. Order that each party pay its own costs incurred in this proceeding. fi This the day of January, 1993. G. Criston Windham, NCSB #7400 WOMBLE CARLYLE SANDRIDGE & RICE Post Office Drawer 84 Winston-Salem, NC 27102 Yv nne C. Bailey, NCSB 9683 W MBLE CARLYLE SANDRIDGE & RI_ E P. O. Box 831 Raleigh, NC 27602 ��nADan . h ALDRIDGE SEAWELL & KHOURY Post Office Box 1584 Kill Devil Hills, NC 27948 Attorneys for Town of Manteo MICHAEL F. EASLEY, Attorney General By: Kathry on s Cooper Special Dep ttorney General Post Office Box 629 Raleigh, NC 27602-0629 Attorney for the North Carolina Department of Environment, Health and Natural Resources Dwight 1- . Wheless Attorney at Law Post Office Box 500 Manteo, NC 27954 JOU . > u ainl/ NG MOORE HENDERSON & ALVIS P. O. Box 31627 Raleigh, NC 27622 Attorneys for Dare County W#53213. DIVISION OF ENVI ONMENTAL MANAGEMENT Date,' �, / Cod 7 9U r� Permit Number To: Technical Support Branch From: Charles Lowe Permits and Engineering Unit Please review the attached material and provide comments or recommendations as appropriate. Thanks, Charles�� cc: Permit File �i. ajB 4 ` jai State of North Carol Department of Environment, Health, a . MGMNi 512 North Salisbury Street Raleigh, Not 9} p ICE U� James B. Hunt, Jr., Governor MEMORANDUM: I R FEB $ Im TO: Preston Howard, Jr., Acting Director DEM WATER QUALITY THROUGH: Mike Street � ) SECTION FROM: Sara E. Winslow, Biologist Supervisor. SUBJECT: NPDES Permits No. NCO079057 and NCO025488 - Town of Manteo DATE: 26 January 1993 The N. C. Division of Marine Fisheries has received the public notice of intent to issue NPDES permits NCO079057 and NCO025488 to the Town of Manteo. Permit NCO079057 for the facility proposes a discharge of 1.0 MGD of treated domestic and industrial wastewater from one outfall into Shallowbag Bay, a class SC stream. Ammonia, BOD and dissolved oxygen are water quality limited. For some parameters, the available load capacity of the immediate receiving water will be consumed. Permit NCO025488 proposes a discharge of 0.25 MGD of treated domestic wastewater. No parameters are water quality limited in association with this discharge. These discharges may affect future water quality based effluent limitations for additional discharges. This agency objects to the issuance of the permits based on the following. The objection to NPDES No. NCO079057 by the Division is a continuation as addressed in a memo dated March 11, 1991. Shallowbag Bay serves as a nursery area for spot, croaker, spotted seatrout, weakfish, shrimp, blue crabs and other commercially and recreationally important species. An oyster resource exists in the area, but presently cannot be harvested due to the water classification/closure. These oysters, however, produce spat that may enhance the adjacent areas. Doughs Creek and Scarborough Creek, tributaries to Shallowbag Bay, are designated P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone 919-7334984 Fax M 919733-0513 (� An Equal Opportunity Affirmative Action Employer Preston Howard, Jr. 26 January 1993 Page Two Primary Nursery Areas (PNA) and classified as High Quality Waters (HQW). Shallowbag Bay serves as a "Secondary Nursery Area" (SNA) though not officially designated. Since 1989, Shallowbag Bay has been pending "SA" upgraded from "SC" and is dependent solely on the removal of the discharges. The increased diffusion into Shallowbag Bay may eventually result in future degradation of the adjacent "SA" waters of Roanoke Sound. According to the permit there are no effluent limitations on total residual chlorine. Research indicates that levels of chlorine of 1.7ppm and greater are lethal to shrimp larvae, and probably to blue crab larvae as well. Blue crabs support the most important fishery of the Roanoke-Croatan sound areas, and Shallowbag Bay is an extremely important producer of blue crabs, as well as a major nursery area. This agency is also concerned with the dilution effects of this increased fresh water discharge into the estuarine system. Based on the importance of the area as a nursery and the sensitivity of the species, the Division feels a toxicity effluent limit should be applied to the permit. The issues of the larval mortality caused by chlorine, dilution of estuarine waters by fresh water and a toxicity effluent limit should be addressed before issuance of any NPDF,S permit. JAN 21 '92 12.56PM WOMBLE CARLYLE P. 1/7 CLIENT I,D.# 22291,1.0 ATTY.# 1106 FAC5Il1�f£ 1•+ WOMBLE C4RLYLE SANDRIDGE & RICE a /� "L- 800 WACHOVL4 BUILDING 9' ,� N ij 8: 4 5 RALEIGH, NORTH CAROLINA 27602 TELEPHONE (919) 755-2100 FACSIMILE (919) 755-2150 TELEX 806498 D , nugry 21 1992 Please deliver the following message to: NAME: Steve Tedder, Water Quality Section FAX# 733-9919 FROM: Yvonne Bailey NUMBER OF PAGES (including the transmission sheet): 7 OPERATOR: � Please call us if the message you received was incomplete or not legible. The telephone number is (919) 755-2100, ev, 6201, MESSAGE; CONFIDENTL4L AND PRIVILEGED The information contained in this facsimile is privileged and confidential information intended for the sole use of the addressee. If the reader of this facsimile is not the intended recipient, or the employee or agent responsible for delivering it to the intended recipient, you are hereby notifwd that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this FAX in error, please immediately notify the person listed above, and return the original message by mail to the sender at the address listed above. JRN 21 192 12.57PM WOMBLE CARLYLE P.2/7 WoarmLE CARLYLa SANDRmoB & RICH 900 WACHOViA BUILDING aAuette mrlCa RALEIGH, NORTH CAROLINA 27601 nxatON.uwu 0rrmer 0000 ON,run UNION CENtea 1600 OAR CAIAC uaa 301 AO9tN COLL9OG atAfAt WAILING AGPaoli AWa Cx ANLerta,Neat"GAa961"A 10202.0023 2400 W49nov1A amwua r....NNxa(704)SS7-4900 rva vrno aaa SS: PONT OrrmN 84 r nLAcon(701) 13119 aeulL NEY 37602 N( 1A CNINOuI. A 77102 TELEPHONE(919)755-2100 (9 ) 7700 Ts"COr7(919)755.2150 OtI rmaemv(919) 21-3660 WACHOVIA tALAOAty(910)721-2f99 tvONNA C. AAIWY (919)755.2329 January 21, 1992 BY FACSLYME.• 733-9919 George Everett, PILD. Director, Division of Environmental Management Department of Environment, Health, and Natural Resources Post Office Box 27687 Raleigh, NC Re: Roanoke Properties Ltd vs Town of Manteo et al Dear George: This letter is to confirm the meeting I set up with representatives of the Construction Grants Section, Water Quality Section, Black & Veatch, Leo Green & Associates, Lee Fleming, Town of Manteo and Roanoke Properties on Wednesday, January 22, 1992, at 3;00 p.m. The meeting will be held at the 10th Floor Conference Room of the Archdale Building, 512 North Salisbury Street, Raleigh, North Carolina. The purposes of the meeting are to discuss settlement options for the various lawsuits, specifically, (1) whether there are alternatives to the current design submitted by Leo Green, e.g. minor modifications to the existing design; and (2) whether the Black & Veatch proposal which was submitted to your office by the Town of Manteo could be a feasible alternative. Black & Veatch was given copies of your memorandum to me dated January 14, 1992 and the memorandum from Bobby Blowe to you dated January 9, 1992. Black & Veatch will be prepared to discuss the points raised in the memos. Attached are copies of materials from Black & Veatch which further explain the proposal. They were given to the Town of Manteo at the time Roanoke Properties presented the proposal to the Town. I received these documents last week from Clark Wright of Ward and Smith who asked me to forward them to you. • JRN 21 '92 12:57PM WOMBLE CARLYLE P.3/7 George Everett, Ph.D. January 21, 1992 Page 2 If you have any questions, do not hesitate to call me, Truly yours, YCB/ YV no C. Bailey Enclosures (4) cc: Gus Granitzki, Mayor Via Facsimile: 473-2135 Kermit Skinner, Town Manager Via Facsimile: 473-2135 Bobby Blowe, Construction Grants Section Via Facsimile: 733-9311 Alan Wahab, Construction Grants Section Via Facsimile: 733-9311 Steve Tedder, Water Quality Section Via Facsimile: 733-9919 Leo Green Via Facsimile: 243-7489 Lee Fleming Via Facsimile: 881-0723 Cris Windham, Esq. Via Facsimile: 721-3599 Daniel Khoury, Esq. Via Facsimile: 441-1798 Dewey Wells, Esq. Via Facsimile: 721-3660 Clark Wright, Esq. Via Facsimile: 636-2121 Rd48205 JAN-.iwN zi- 92 ' 12.58PM WOHBLE 'cf:AYLE__., --,RN FAX NO. 8196362121 P•4/7P. 02 MANTEO WASTEWATER FLOW PROJECTIONS 201 FACILITIES PLAN, MODIFIED FOR WINTER INFILTRATION AND WINTER (1990) FLOW 440,862 GPO WASTEWATER FLOW BASED ON COMPLETE PRACTICAL DEVELOPMENT WITHIN EXISTING MANTEO LIMITS 517,676 GPD PROJECTED NEEDS BASED ON FUTURE GROWTH 400,862 GPD ESTIMATE OF WASTEWATER NEEDS FOR TOWN OF MANTEO BASED ON ' POPULATION (DATA FROM 201 FACILITIES PLAN) 464,808 GPD PLAN AS RECOMMENDED WITH REDUCED FLOW REQUIREMENT FOR PIRATES COVE 525,000 GPD i JAN-iAN 21 92 '-12 5ePN WOMBLE _CRRLYLE„_„ _ `RN FAX N0, 9196362121 P 5'7 P, 03 RECOMMENDED MANTEO WASTEWATER TREATMENT FACILITIES 4AINTAIN EXISTING d. 125 MGD WWTP WITH RAPID INFILTRATION IN OPERATION. ADD A NEW 0,400 MGD DAVCO MANUFACTURED, FIELDERECTED WWTP IN CONCRETE BASIN TO DISCHARGE THROUGH A DIFUSER SYSTEM TO SHALLOWBAG BAY, COST OPINION WWTP-DUAL TRAIN 1420,00 AERATION BASIN DIFFUSED AERATION SYSTEM WR BLOWERS FINAL FILTERS SLUDGE DIGESTION, AEROBIC TERTIARY FILTERS 112.00 CONCRETE CONSTRUCTION 115,00 FIELD ERECTION 80,000 PAINTING 40,000 SITEWORK 100,000 ELECTRICAL 203,000 STAND-BY GEN, 100,000 � TS OM E 2 l PRQJ�CT BID TAB INFLUENT PS & PREL. TRT, 225,00 OPER BLDG, 165,000 CHEM, FEED SYSTEM 100000 BELT PRESS BLDG, 142,000 SLUDGE HOLDING LAGOON 950000 EFFLUENT PS 100,000 EFFLUENT OUTFALL/DIFFUSER 256,000 2,253,000 ENGINEERING & CONTINGENCY, 20% 450,000 OV_ _ ERALL TOTAL 12,703,000 COST PER GALLON OF CAPACITY . : 12 7M Mn/595 000 I �S 1S/GAL ION �r JAN-JAN721`9B2-12:58PN WOMBLE CRR4Y4E___._ ?RN FA8 N!), 818636212t P.6/7P, 04 7 . RECOMMENDED OPERATING SEQUENCE INFLOW 7 200 .200 .0625 .0625 MGD MGD MGD MGD (� ) (2) (3) (4) °4S `tS 'ti C� ,7 Yas OUTFLOW J SHALLOWBAG INFILTRATION BAY BEDS FLOW UNITS IN OPERATION UP TO 325,000 GPD 2,3&4 325,000-400,000 GPD 1 &2 400,000-462,500 GPD 1 ,2&3 462,500-5251000 GPD 1 ,2,3&4 IT LS RECOMMENDED THAT STATE APPROVAL BE SOUGHT TO DISCHARGE TO THE INFILTRATION BEDS 125,000 GPD OF EFFLUENT REGARDLESS OF THE OPERATING rnMRCIIRATION AF THE FYPANM Fora nv • JAN`JRN_21 ,_92 , 12_59PM WOMBLE CARLYLE,,,,,, .,1RN FAR N0. 8198382121 P•7/7 P, 05 RECOMMENDED FACILITIES COST COMPARISON 201 FACILITY ALTERNATIVE FACILITY 600,000 GPD* 25,000 $4,540,400 $2,703,000 $7.56/GALLON $5, 15/GALLON $1 ,965,993 $951 ,456 (43.3%) PIRATES COVE (35.27c) $2,574,407 $ 1 ,751 ,544 (56,7%) TOWN (64,8%) + BASED UPON PIRATES COVE DMLOPEIENT DENSITY BEING LESSENED SO AS TO REQUIRE ONLY 185,000 GALLONS PER DAY OF WASTEWATER TREATMENT CAPACITY. ✓Y AGENDA FOR MEETING JANUARY 22, 1992 TOPIC: TowN OF MANTEO WASTEWATER TREATMENT PLANT DESIGN AND 201 FActt_r11?S PLAN 1. PURPOSE OF THE MEETING To discuss alternatives to the wastewater treatment plant currently permitted and designed by F.T. Green & Associates II. MAJOR ALTERNATIVES a. Black & Veatch proposal dated January 6, 1992 b. Modifications to the existing design submitted by F.T. Green & Associates rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr Factors to Consider in Discussing Alternatives H. a. and b. Cost 1. Can costs be cut from the current design? 2. Are the costs set out in the Black & Veatch proposal all inclusive? • Feasibility of Using the Existing 125,000 gpd plant 1. Will the plant be adequate for the next 20 years? 2. If the plant's adequacy is unknown, what type of study needs to be done, how long will the study take, and how much will such a study cost? 3. Will the plant be able to meet its design capacity? (It is currently at 40% of design flow, and the Town has experienced problems.) • 201 Funding 1. Will delays result in the loss of funding? 2. Costs of engineering will not be covered if a new design is submitted. (Who will pay for the extra costs?) R#48292 J4-21-92 TUE 15:55 WARD & SMITH NEW BERN FAX NO, 9196362121 P. 01 WARD AND SMI'TIi TELECOPIER COVER MEMORANI?UM The information contained in this facsimile message is attorney privileged and confidential information intended only for the use of the individual or entity named below. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is wrongful and may subject you to civil liability. If you have received this communication in error, please immediately notify us by telephone, and return the original message to us at the below address via U. S. Postal Service. Thank you. DATE: January 21, 1992 TO: Steve Tedder, water Quality ADDRESSEE FIRM: ADDRESSEE CITY AND STATE: ADDRESSEE PHONE: 919-733-5063 ADDRESSEE TELECOPIER PHONE: 919-733-9919 TOTAL PAGES TRANSMITTED: C:L' INCLUDING COVER MEMORANDUM CLIENT FILE NUMBER: 91L0949(A) FROM: I. Clark Wright, Jr. 120 Went Fire Tower Road X 1001 College Court suite 1602 Poet Office Box 8809 Post Offloe Box 667 One Hannover square Greenville, NO 27B35-8608 Now Bern, NC 28563-0867 Fayetteville street Mail Telephone: (919) 355-3030 Telephenei (919) 633-1000 Ralolgh, NO 27601 Facsimile: (919) 756-3689 Facsimile: (919) 636-2121 Telephone: (919) 836-1900 FacaMle: (919) 636-1507 # # # # # # # # # # # # # # # # IF YOU DO NOT RECEIVE ALL OF THE PAGES, PLEASE CALL AS SOON AS POSSIBLE AND ASK FOR THE "TELECOPIER OPERATOR." sss ssssssssssass # # # # s # # # ssssaa # # # TELECOPIER OPERATOR: a/1(- -I/� TIME: (1:) "5 TRANSMISSION CONFIRMED: TRANSMISSION NOT CONFIRMED: TIME: COMMENTS: JAN-21-92 TUE 15:56 WARD & SMITH NEW BERN FAX NO. 9196362121 P. 02 WARD AND SMITH, P.A. OFFICE MEMORANDUM Attorneys at Law TO: George Everett and DATE: January 21, 1992 1/22/92 DEM Meeting Participants FROM: Clark Wright CLIENT: Roanoke Properties COPY To: File MATTER: Manteo WWTP FILE NO. : 91L0949 (A) SUBJECT: January 22, 1992 Meeting with DEM Staff VIA FACSIMILE TRANSMISSION The purpose of this memorandum is to confirm attendance by Joe Hardee and Max Frazier of Black & Veatch, Glenn Futrell of Roanoke Properties and myself at the meeting arranged by Yvonne Bailey for 3:00 pm on Wednesday, January 22 , 1992, in the 10th Floor Conference Room of the Archdale Building, Raleigh, North Carolina. In response to Yvonne Bailey' s facsimile letter of even date to George Everett, Roanoke Properties would like to assure DEM that the purpose of this meeting is not to attempt to utilize State staff and resources to effect settlement of private litigation. Instead, the goal is to facilitate constructive dialogue between DEM staff., the engineers from Black & Veatch, and the engineers from F. T. Green & Associates such that ( 1) the parameters of the Black & Veatch proposal are clear to all, (2) Black & Veatch has a fair opportunity to respond to the points raised by George Everett ' s letter and Bobby Blowe's memorandum, and ( 3) significant progress is made towards the ultimate goal of implementing the most cost effective solution for the Town of Manteo's long term sewage treatment needs . I look forward to discussing this Wjr h all of you tomorrow. I . Clark Wrig Distribution: Gus Granitzki, Manteo Mayor Kermit Skinner, Manteo Town Manager George Everett, Director, DEM Bobby Blows, Construction Grants Alan Wahab, Construction Grants Steve Tedder, Water Quality Leo Green, F. T. Green & Associates Lee Fleming Yvonne Bailey, Esq. Cris Windham, Esq. Daniel Khoury, Esq. 91L0949(.\) 11/21192 ICw\r@t V9MAIN\12998. Ti�h��� 7 ow R E a; E Q V E D ROAt�M PROPER - J h.N p 1992 * ``EIVED WATH QUAi_ITY SFCT101' JAN 1 i UPER.ATs ONS ,92 FACILIiIEJ gg$E&,WEINTT UNIT � '�IfBM:TTAL D TO: FROM Data: Rat 3 ARE 11 TRa11ml%?ALBpAA(mo 0 p308d INCLOOIIIO aa�IMILlt 18 "ILI )MBaOE IS U07 CUM' pLBABg (919) 473-3700. ADDITIONAL INPOPA►TIONr; Age ap 7 o /ff/ 7�' av P ��� iRXTM a V . WMXR "It ROAXOM PROpolI68 919 ( ) 473-6414. P.C. Ipp,MaUao,Nw*Castro M34-IVIV)in4no 1. 1 �� ROANOiCE PROPERTIES CIA December• 5, 1991 Department of Environment, Health & Natural Resources Division of Environmental Management 512 North Salisbury Street Raleigh, NC 27611 Attn, Dr . George Everett, Director Subject: Manteo Sewer Plant Gentlemen: As you know there has been much controversy regarding the proposed Manteo wastewater treatment plant. This controversy has involved all aspects of the project from siting to discharge of effluent and particularly the design of the plant. I am writing you at this time to express my concern and disappointment on the way some of your staff has handled the State': role in this process. My first contact with you was in August when you spoke at the public meeting in Manteo and discussed the State's position on the discharge permit. As I told you immediately after that meeting, I was extremely impressed with your Presentation. I was proud of the way you represented the State. I thought You were very open-minded, knowledgeable on the subject, practical , firm and direct, and that you clearly and professionally communicated the State's position on the discharge. It was refreshing. You also made it clear (and correctly so) that it is not the State's responsibility to determine atlernative solutions but to approve or disapprove ■ proposed solution made by the Town and the Town's Engineer . I believe this same concept applies to the actual design of the project. It is not the State's responsibility to design this wastewater treatment plant but rather it is the responsibility of the Town's Engineer . I believe it is the State's responsibility to set the level of treatment for the effluent discharge and to review and approve the Engineer 's plant design to most the State treatment requirements. It is in this area of review and approval that I believe your staff has gone far beyond its appropriate role in this process for the Manteo project. I will show and prove with studies currently being done that the analyses of alternatives for the project design were Inadequate and misrepresented. Further , we will show when we get in court, the many design flaws in the plant that have resulted P.O. Box 1079,MmhMe, North Cwolm V954•(919)473.3700 Page 2 in unnecessary and excessive cost of this project. I do not blame the State for the improper analysis of these alternatives nor the over-design of the plant. However , the State has projected a very biased position that they support all aspects of the project as currently designed. Furthermore, they projected to the Mantso Town Commissioners through various letters and in public town meetings that the plant design, for the most part , has been dictated by the State . At the very least, certain Town officials have repeatedly stated that the specific plant design was required by the State . Additionally, they state that the current design cannot be altered because the State forbids it . This is obviously improper . Although the State certainly participates in setting the design criteria for certain components of the plant , it is the primary responsibility of the Engineer to design the project in accordance with reasonably accepted standards, in the Profession and to present the most economical alternatives to the Town. I will not attempt to go into great detail about the specifics of design in this letter . However . I would like to point out an example of the many design aspects that will be reviewed . On or about August 25, 1991 , I Contacted You by Phone and expressed my concern about the oversizing and other design flaws with the plant. You promptly looked into my allegations and responded with a hand written note dated August 30. 1991 (see attachment). One of the things I mentioned to you was the oversizing of the filters . The project design criteria states the filters are to be designed based on an overflow rate of 2 gal/min/ft squared. In your note, you said that the 2 gal/min/ft squared was used for a total filter area of 216 ft squared giving a capacity of 622,080 gal . However , you will note from the plans that each filter has an area of 216 ft squared giving a total capacity of 1 ,244,160. Subsequently , a letter written by John Blowe ( see attachment) said that a design criteria of 1 .0 to 1 .5 gpm/ft was required . The inconsistency between the project design criteria, your letter and Mr . Slow's letter are obvious. Furthermore , it is obvious from Mr . Blow's letter dated October 10, 19910 that he was picking a design number to try and justify the size of the filters for a supposedly 600,000 gal capacity • These kinds of things, and many more, will come out when our lawsuit is tried in court. As you know, Pirate's Cove is paying for 43.3% of the capital cost of the plant. In addition, the many citizens of the Town of Manteo living in Pirate's Cove will also be affected by the high user rates resulting from the excessive and unnecessary high cost of this plant. Because of Pirate's Cove role in this Pape 3 project and as state tax payers, we believe our state government has the same obligation to us, the Town of Manteo. We simply believe that the project has been poorly analyzed and designed from an engineering standpoint , resulting in excessive cost to us and the citizens of Menteo. Our only request all along has been that this project be reviewed by an independent engineering firm before construction takes place. We have offered to pay for this review. There is no urgency to start construction . The disagreements in this situation are between the Town and Pirate's Cove. I might add that many local citizens also agree with my position. Unfortunately, the State appears to have taken aides and inappropriately supported many aspects of the project that should be left to the Town and those paying for the project . The local Town Commissioners are greatly influenced by any comments and positions taken by the State. It is , therefore , prudent that the State be extremely careful about how they participate and the role they project in this process. Although this letter is long, my request is simple . I request that you review the State's proper role in this project and so instruct your staff to refrain from overstepping their responsibility and appropriate role in this project as it goes forward. very truly yours, 01dfTn`g." tr 1� Managing Partner , Pirate's Cove Registered Engineer , NC 4678 Attachments 6 - 9 2 M O•N 1 5 : 1 4 R . 02 -.J.. FuJbry� ROANOKE PROPERTIES January b , 1992 i To The Mayor , Commissioners and Taxpayers of the Town of Manteos The design conospt and the unusually high cost estimate for the .wastewater treatment facility proposed by F .T . Green and Associates , P.A . , coupled with the proposed abandonment of a of9serrious000 econcernttoatment RoanokelProperties in tand the taxpayers of me a theTown of Mantoo ( the "Town" ) . In response to this concern , Roanoke Properties employed Black & Veatch to evaluate the wastewater treatment needs for the Town and to recommend more cost-efficient treatment facilities to meet those needs , The Initial Engineering Report of Black & Veatch sets forth A facility plan alternative that will most all actual requirements of the North Carolina Department of Environmental Management ( "Department " ) , All expanded requirements that the Department indicates will be required in coastal areass and all Pro,leoted needs of the Town of Mantoo at a savings of $1 ,837 ,400 over the contract and bid cost for the facility proposed under the 201 Facilities plan . Roanoke Properties recognizes that this alternative , like the currently accepted alternative , continues discharging into Shallowbag Bay. The reasons for this are ( 1 ) that the Town of Manteo has decided that land application is too costly , and ( 2 ) that the Department of Environmental Management of the State of North Carolina has indicated that is will not allow addition to the rapid sand infiltration system used in Manteo . These decisions are out of the hands of Roanoke Properties and our anginoaring consultants , The opinion Town could adopt pthe id"expanded aBowsertownch alternative indicates ttotmeet the needs of the Town of Mantoo with a maximum permitted effluent volume increase of only 276 ,000 gallons per day ( S2S,000 gallon total capacity minus 260 ,0o0 gallons currently disoharood) . The effluent discharged from this expanded facility would have tertiary treatment , and would be significantly "cleaner • than the current Shallowbag Bay facility effluent . All indications , based on very vaneroue estimates , show that the needs of the Town of Manteo Can be more than met for the next 20 years with a S251000 gallon per day total capacity wastewater treatment system. The Town has invested a994 ,000 in a five year P.O, Box 1879, MoMeo, North Carolina 27954•(919 473.3700 a. - 92 MON 1 S : 13 'P P . ® $ Page 2 old wastewater treatment Plant that could handle 125 ,000 gallons Of that Capacity , This Plant could be expanded, meeting the highest State specifications , for g2 ,703 ,000. Final design would Probably result in a slightly lower cost figure . The Protected cost of this new Proposal includes all engineering and design fees , as well as all construction and materials cost . This proposal would result in a cost of approximately $5 .12 per gallon , only 12 cents per gallon more than the anticipated cost in the Agreement between Roanoke Properties and the Town of Manteo , The Citizens of the Town of Mantso and Roanoke Properties can get everything they need in terms of high quality , environmentally sound wastewater treatment for a fraction of the cost of the currently proposed facility . How can we Justify anything else? 01lann E. Futr Managing Partner Roanoke Properties Limited Partnership ,,u .-P�, s,.1, � N..c� dD dLiZ�. �y�.,e.,� -y ".✓�" � �.C.�•-P Alt y,u." lie J fi•N -•9 2 M O H 1 3 Z 1 a P . 04 Engineering Report TOWN OF MANTEO WASTEWATER TREATMENT FACILITY EVALUATION AND EXPANSION Prepared For Roanoke Properties Limited Partnership Manteo, North Carolina Black & Veatch Raleigh, North Carolina Prolect No, 18587 J A•N. 6 - 92 MOM 1 H : 16 P . ® s I HEREBY CERTIFY THAT THIS REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION. 91ONEDo SEALED, AND DATED THIS 6TH DAY OF JANUARY, 1992 . lay W. Max Ftas er, .E. syl ose� r ®e, P.E ai . ssl ���tHCARp��y �pQ`� •p��sip ��y9�g �i 4 BEAD Y SEAL 2271 4079 t GINE 640,00601, m NY wuosao�A� sanoial aoe�ce , we�ulw�sooea, JA.N C =92 MON IS ; 17 P . 06 CONTENTS Introduction The Currently Proposed Wastewater Treatment Facility Relevant Statistical Information The Best Alternative For Manteo Modifications Indicated By The Engineering Review Shallowbag Bay Exhibit A - Manteo WWTP Comparisons Exhibit B - Flow Projection Data From Town of Manteo Exhibit C - Tabulation of Costs of Recommended Alternative Exhibit D - Conclusions and Recommendations From Rusanow, Kane & Andrews, Inc. Report J R•N.- 6 - 92 MON 15 : 17 P 07 INTRODUCTION In 1990, a Wastewater Facilities (201) plan was completed for the Town of Manteo on Roanoke Island. The resulting recommendation was to abandon the secondary treatment plant and the five year old, tertiary treatment plant that currently serve Manteo and to build a new wastewater treatment plant with a capacity of 600,000 gallons per day. The recommended alternative, as contracted, would cost approximately $466,000 in enginedring and design fee■ and $4 ,079,400 in construction costs; total cost to the Town of Manteo is estimated at $4,840,400.00. The existing Bowsertown Facility, that was completed in 1988 and is scheduled for abandonment, coat $994#900 and presently has an anticipated useful life of at least 20 more years , Roanoke properties Limited Partnership ( "Roanoke Properties") is a real estate development firm involved in the development of the residential community known as Pirates Cove. This development is located on the east side of Roanoke Island, near the Highway 64-264 bridge which leads to Nags Head. Roanoke Properties initially had planned to construct and operate its own wastewater treatment facility to serve Pirates Cove, and had obtained a permit from the Division of Environmental Management for the discharges of that facility. However, the Town of Manteo was conducting a study of wastewater treatment alternatives available to the Town, and indicated that Roanoke Properties could be currently served by the Town's available systems and adequately served in the future by whatever wastewater treatment alternative was selected. Based on that information, Roanoke properties allowed its permit for a wastewater treatment plant to expire and agzeed to provide a percentage of the funding for the Manteo wastewater treatment plant improvements. The design of the selected alternative from. the 201 study, the "Proposed Facility, " was completed in May of 1991. Construction bids were received in June of 1991 . The contracts and bids for the Proposed Facility reflect a total cost of $7 . 56 per gallon available volume, The actual 1 ' J A N 6 — 9 m M O N 1 5 s 1 8 P 8 8 construction bids reflect an increase of 28% over anticipated costs according to correspondence from the Manteo Town Attorney to the attorney for Roanoke Properties dated July 18, 1991. Roanoke Properties employed Black a Veatch to reevaluate the future wastewater treatment needs of the Town of Manteo. Roanoke Properties' goal was to identify whether there was a more cost efficient alternative to meet the wastewater treatment needs of the Town. After appropriate study, Black 6 Veatch recommends the following alternatives Maintain the relatively new Boweertown plant, expanding it with a new facility at the same site. The Black 3 Veatch preliminary cost opinion for this approach is Two Million Seven Hundred Three Thousand Dollars ($21703,000) , Consisting of $00 ,000 in engineering and contingency costs and $2,253,000 in construction cost. THE CURRENTLY PROPOSED WASTEWATER TREATMENT FACILITY It is our opinion that several of the equipment specifications for the Proposed Facility have been written in a manner that effectively requires purchase of equipment from a single source, and therefore a limitation on the competitive bid process . The use of a single equipment source, rather than the more common competitive bid approach, can be expected to produce significantly higher cost. Additionally, the design and layout produced for the Proposed Facility fails to take advantage of common wall construction, increasing wall construction costs and increasing the piping required between units . The proposed site work grading does not appear to take advantage of natural drainage patterns, and results in increased needs for drain inlets and storm water piping. The aeration basin is designed for installation below the ground surface, resulting in a need for extensive excavation with no benefit to the system, other aspects of the design result in higher cost, decreased efficiency, and in some cases are unnecessary (see Exhibit A attached) . 2 6 - 3 2 M O N 1 9 . 1 9 P 0 9 The total cost of the Proposed Facility, including design and engineering fees, is estimated at $41540,400, or $7,56 per gallon Volume. Although the State of North Carolina Division of Environmental Management has indicated that it intends to require a very strict design approach ( "oversizing" ) of wastewater treatment plants in environmentally sensitive coastal areas, and some aspects of the high cost of the Proposed Facility may be attributed to this recommendation, the needs of the Town of Mantso can be readily met, within these state guidelines, with a more cost efficient design, RELEVANT STATUTICAL INFORMATION The following tables reflect the proposed wastewater treatment needs for the Town of Manteo. The estimated wastewater flows found in the charts were based on winter rainwater/ groundwater infiltration rates (when infiltration is at its highest) and winter flow rates , This is the time when actual, total effluent into the system is at its highest point. Estimated future flow rates were determined based on the State of North Carolina estimate standards, and reflect an estimated 400 gallons per single-family household per day flow (actual daily flow per household is more in the range of 200 to 250 gallons per day) , 3 .,JFa•N 6 - 92 MON 15 . 19 P . 1, 201 Facilities plan, Modified for Winter Infiltration and Winter Flow - 1990 (Winter) Existing Maximum Winter Wastewater Flow: 109,000 gallons per day Existing Maximum Winter Infiltrations 1420000* Total Maximum Existing Wastewater Flow, Winter (maximum summer flow 206,000 gallons per days Future Permanent Residents 0 73 gallons each (from 201 plant 13,248 Future Flow from Increases in Tourism ( from 201 plan) : 13,938 Pirates Cove, Additional Flow From Estimated Full Developments 146,976** Future Industrial Flows 15,700 TOTAL 440,862 *Measured prior to rehabilitation/inflow corrections , **Total flow from full development minus flow from existing homes that is included in the existing flow figures above, all flows based upon State of North Carolina estimate standards . 2 , Wastewater flow based on complete practical development within existing Manteo limits Maximum Winter Existing Flow, Wastewater 9 Inflow/Infiltrationt 251,000 gallons per day *Additional Flow from Maximum Practical Complete Developments 104,000 Future Development at Pirates Covet 1146,976 Future Commercial and Industrial Flow Increase 13,70Q TOTAL 317,676 - winter *Flow compiled by planner for Town of Manteo. (See Exhibit B attached, ) 4 6 - 9 2 M O N 1 '5 : 2 0 P 1 1 r 3. projected Needs Based on Future Growth: Peak Usage Measured Subsequent to Inflow Corrections - Augutet, 19911 211,000 gallons per day *Future Projected Needs from 201 Facilities Plan, Including Industrial Needs, 8-11-901 42,806 • Future Build Out of Pirate' s Covet 146 97 TOTAL 400,862 *Taken from 201 Facilities Plan, 6-11-90- 4 , Estimation of Sewer Needs for Town of Manteo Based on populations (data from 201 FaoWties Plan) Permanent Residentat 72 gal/day/cap Visitors: 50 gal/day/cap Existing Permanent Residentss 1,205 10 Year Populations 1,389 Current Visitor Populations 2, 360 10 Year Populations 21636 Current Pirate's Coves 300 10 Year Populations 11500 Total Needst Manteot 1,389 x 72 a 100,000 Visitcrat 2 ,636 x 50 0 131,800 Pirate's Cove 11500 x 72 = 108,000 Estimated Total Commercial 8 Industrials 50,000 Infiltrationt (201 Study 75,000 Infiltration Reduced by 464,808 Inflow Corrections) 5 6 - 9 2 M O N 1 M : 2 0 P . 12 5 . Projected Actual Usages (Peak Pirate's Cove Actual 14 #250 Au ust m . 38 (based on 1991 records) Al ocation 37,226 Total Projected Additional Actual 146,976 x .38 = 35,650 for Pirate's Cove Existing Flows (August 1991) l 211,000 gallons per day Future Growth, Including Industrial Growth: 42 ,886 Future-Actual (Pirate's Coveys +- 3 TOTAL 309,735 Note: All estimates could be further reduced by implementation of a water conservation program. THE $EST ALTERNATIVE FOR MANTEO: A NEW 400,000 GALLON FACILITY AND CONTINUED USE OF THE FIVE YEAR OLD ROWSERTOWN FACILITY. The current SOWsertown facility was completed in 1986 at a cost of Nine Hundred Ninety-Four Thousand Nine Hundred Dollars ($994 ,900) ($793,380 facility cost, $201,520 land cost) , This 123,000 gallon per day facility is functioning as designed and meets all North Carolina Department of Environmental Management specifications and requirements . Using a 25 year life span estimate, abandoning this facility now would cast approximately $634,704 in lost functional value, Replacement of this facility at today's costs would require approximately $1,000,000 . Black 6 Veatch recommends, based on the proposed wastewater needs as reflected is the charts above, that a new 400, 000 gallon facility expansion be added to the existing eowsertown facility. This recommended alternative takes into account the "overaiaing" requirements that, it appears, will be required by the State of North Carolina for coastal area discharges , This alternative is consistent with the Town's requirements as set out in the 201 Facilities Plan, and would meet the HOD, total suspended solids, ammonia, coliform, and dissolved oxygen specifications set out in the current 6 , .TAN = 6 - 92 MON 15 : 21 P 3 E professional Services Contract. . The total projected cost opinion for this alternative is Two Million Seven Hundred Three Thousand Dollars ($21703,000) , or $5 . 15 per gallon of total capacity (see Exhibit C attached) . This cost opinion includes a facility installed within a concrete structure. Facilities of the type recommended have been successfully used at the one and one- half trillion gallon per day plant in the City of Havelock, Craven County, North Carolina, since 1967, which plant has met advanced waste treatment standards for past ' 12 years. This type facility has a functional life span of 30 years plus . This proposed combined facility, including the existing sowsertown plant, should meet the wastewater treatment needs for the Town of Manteo for the next 20 years plus. Additionally, the Town will not lose the use of the $994,000 facility that was built in 1986 , MODIFICATIONS INDICATED BY THE ENGINEERING REVIEW We do not recommend proceeding with the Proposed Facility. However, in our review we made note of the following modifications that could be implemented to reduce costs (1) Revise specifications to encourage more competitive equipment bids (on items such as aeration basins and the control system) . (3 ) Revise plant layout to reduce piping distances and take advantage of common wall construction. (3) Revise the site work to allow for more natural drainage patterns and to reduce the need for •installing drain inlets and storm water piping. (4) Raise the elevation of certain aeration basins to reduce excavation costs and provide gravity flow of sludge stream. (There are no functional advantages associated with locating aeration basins below the ground surfacs.) 7 M O N 1 5 t 2 2 P . 14 � f (5) Improve the plant's hydraulics by modifying the piping, distribution boxes, weirs, and flumes. (6) Revise the followings • Head/Works - Use less costly and more efficient pumps and screens to reduce cost. • Influent Pump Station - Consider elimination of this pump station as all influent is pumped to the plant, + Chlorine Contact Basin - Eliminate, as the same treatment effect can be provided in the pipeline through which the effluent must already flow. Effluent Pumping Station - Use a less costly and more efficient pump type. • Control System - Use components more suited to this type and size plant, reducing excessive electrical costs. The preliminary opinion of costs saved in construction, based on the above recommendations, is approximately One Million Dollars ($11000,000) . SHALLOWBAO BAY This initial report was completed under the assumption, based on the 201 Facilities Plan, that there is only one effluent discharge method availablet discharge into Shallowbag Bay. Under the Black & Veatch "expanded Bowsertown" alternative, the Town of Manteo can meet its needs for wastewater treatment with a maximum permitted effluent discharge volume increase to Shallowbag Bay of only 60% ( 150,000 gallons per days 525,000 gallon total capacity minus 125, 000 gallon rapid sand treated effluent minus 250,000 gallons currently discharged) . Based on relative design criteria, the Black & Veatch alternative will provide significant improvements in the treatment levels for all effluent and will result in a traction of the environmental impact on phallowbag Bay that is currently imposed by the J A N - 6 - 9 2 M O N IS 1 2 3 P 1 6 existing plant (e.g, , BOD loading by the new Black & Veatch facility at 400,000 gallons full capacity based upon permit limits would be only 26 .7% of the current permitted BOD discharge by the existing facility at 250, 000 gallons) . Black & Veatch also has developed a proposed cost opinion for an expanded Bowsertown facility that would utilize rapid sand infiltration for all effluent discharges . This would involve construction of additional rapid infiltration fields similar to the existing field at the Bowsertown site. This option would eliminate completely any discharge into Shallowbag Bay and would cost a total of $2,843,000 or $5 . 42 per gal, of available volume. Various studies 'previously have been conducted to investigate the suitability of the soils at the Bowsertown site for onsite distribution of the facility' s effluent. The most extensive study dated March 1990 and entitled "Hydrogeologic Site Investigation" was conducted by the firm of Russnow, Kano and Andrews, Inc. , Raleigh, North Carolina and the portion of their report entitled "Conclusion and Recommendations" is included as Exhibit D to this report. The Russnow, Kane and Andrews, Inc. report documents that the site can accommodate up to 11000,000 gallons per day but indicates that a line sink (ditch) would be required around the plant area that would eventually drain to Croatan Bound. The waters in Croatan Sound are classified as BA. It is our understanding that the State has indicated that it considers suah a line sink (ditch) as a point discharge into SA waters P and, therefore, would not approve of this discharge solution. Thus, we cannot affirmatively may at this time that this disposal solution would be approved by the State, The analysis that would be required to further pursue this solution was not authorized in this study, Factors that could be taken into account that might result in reconsideration by the State area 1) The total design volume of discharge (based on our study) would be 525,000 gallons and not 600,000 or 11000,000 . The actual discharge for several years could be less than 300,000 and may not actually exceed 400,000 based on current Town limits . a J fqN -� 6 = 92 MON 15224 P 17 J,p N a - 9 2 M ON 1 9 : 2 a P 1 6 2) The various methods Of land disposal could be reviewed further to determine the feasibility of not having line minks because of the reduced volumes . s) If line minks are required, additional study should review the feasibility or directing these line sinks away from Croatan sound and thereby eliminate the State's concern for discharging into SA waters . 4) Further study, including modeling, could be conducted to determine the quality of the groundwater at the line sinks , This was not done in the previous studies. 2f such a study should indicate that the quality of the groundwater at the line sinks or compliance boundaries is of acceptable levels then this should satisfy the State's concerns. In our professional opinion, an acceptable environmental and technical solution of discharge on the Bowsertown site could be designed, However, we cannot predict at this time the probability of obtaining state approval for this solution, CONCLUSION The wastewater treatment needs for the Town of Manteo can be met for the next 20 years with a 525,000 gallon per day total capacity wastewater treatment system, This system can be provided by expanding the capacity of the existing Boweertown facility by 400,000 gallons per day. This expansion could be completed, meeting the highest State specifications, for $2, 703,000.00, or $9 , 15 per gallon of available volume. ouo9ee�,,� 1s�aoiel MCYJSY\9016. ' 4 .- D Z Bxhibit A A a MAN= WTP CIMARISCWS N DESIGN AND XQUIPMMrSP&CIFICATIGN.4 DSSa IK BIDS AND COO ZSTIMATRS 3 0 z SPEI`S. USED TO CaXCWXM COST M5233MMM PBDC= GME8 PAC.. 201 Pl" P'UM P'liW Bw COMMOM 'b• TZONECOM "M 0-6 "M 10) P60l. 201 PLS3 PLAW 0.12S li60 I P%AW 0-4 MW m Preliminary Treatment 1/2" screen aerated Projected costs caL las utilizing the A aurae effiCiswnt screen can Screening chit system same design tecbsology/eclaipment as used be provided bor Grit Removal Pamehall flees in the 201 fact ;ties plan approximately half the cast vim Measurement of that specified for the facilities Plan plant- influent Ysmp Statfo ID60 Spa 2 gacpe Projected costs calculated utilizing the consider elimination of variable speed same design tac mol.ogy/egaipment as used either the RAS Or influent in the 201 £a=Mti i.es plan. pump station. An.=ti,m Basin 24-bour detention 24-hour detention 24-Lour detention Facilities plan spates is time time utilizing tin patented and sole-emace. existing equIpatenttins was elind_+ &*ed. FirwT clarifiers 2, 36--dia., 12* 2-216 sq. ft., 142 2-500 sq. ft., 150 the greater depth in SCE) plow type, 295 SFD bopper-type, SRD plosrtyps, 400 alternative clarifiers would am 289 CWR CM wrowide efficiency. 6ln47ge Raciacolatian 2 recirculation Airlift pump Airlift pump -MS Or influent p®ping can Pumps pmnps a 500 9FW Zscirc.. 90 gpa recirc. 300 gpm be eliminated £cam the variable speed facilities plan plant with site modification. Filters 2 0 215 sq. ft., 2 0 38.5 sq. ft., 2 6 212 sq. ft-, Alternative filters meet D= ]la of media, 1 36" of media, 1.23 12n of media, 1.25 criteria and be" deeper ft.= gpo/ft.= gla/ft.= filtration wedia. Disinfecti,on/ Chlox!ffi- Chlorination; Chlorinatimap Chlorine Oontact/reaeration Tumbratinn denhlorination dechlcainatiaa� dechlorinatim- basin can be eliminated from basin mechanical cascade aecati n at cascade asrntinn the facilities plan plant by � aerator the diffuser system utilizing point of discharge eration/dealwinatlOn at r the diffuser system. 0 D SPECS. OSl® TO CATACOEATB COST ffiT-EM3MM . N PBOCi;ss.811M FW— 201 PLRK PMW ffiIIIC PfaWr )i4V CO�ffiINA22MM TM ( f an) PEW. Anurrim 3 0.6 11CA 0.125 NGO PLxlrr O_4 "M 201 Pf P PLMr 0 Z Slndga D tion Aerobic digeetionp Aerobia digestion; aerobic digested., Aerobic digestion is 1.4 ca. ft./100 1.3 cu. ft./10O 2.0 cu. ft./100 generally the most costly gal- of capseft gal- of capacity gal. of capacity method of sludge mechanical aeration diffused aeration diffused aeration ..teyiliz.ti..n_ Lima 0 stabilin.tinn would be moue •• economical. Facilities plan N plant and the alternative 0 eosld each be readily converted. 8ladge Storage aerated basin. Projected casts calcvulated sf•il� i� the 8o recommended changes. 44,1B6 cu. ft.; same design technology/equipment as used land application in the 201 facilities plan Sludge Dewateriag Belt press, Projected costs calculated utilising the This eyaEem eI Id be chemical System, same design techoologyl/equipment as used reevaluated. It is Fly her haildi+an in the 2O1 farilities plan unnecessary mince a liquid system is usually mane - econnnirsl to operate. Effluent PuWiag 2 pumps, variable Projected costs calculated ast lazing the The facilities plan system Station speed, 1050 gpm same design tschatiy/equipment as used uses solids-handling pangs. each in the 201 facilities plea Following danced tteabmixt and filtration, propeller Psalm would be less costly and moha efficient. Effluent Outfall and 12-inc. Diameter Projected costa calcmlated utilizing the Polyethylene pipe with Dlfluser with 15 1-3/4z same design techrahogy/equipment as used aoenczate collars would be pone in the 201 facilities plan lean costly for underwater piping and diffuser. General Administration Projected costs calculated utilizing the Can be scaled down to better building chmical acme design techwlOgy/egaipmeat se used meet the needs of the plant feed system standby in the 201 facilities plan and decrease costs. gem Y L4 JA N - 6 - ® 2 M O N 1 9 . 2 7 P . 20 a Nry M d e oa 1 J A N = 4 = 99 2 M O N 1 9 : 2 T P . 2 1 EXHIBIT 3 cTiltutt of filaten October 17, 1991 Mr. Glenn E, Putrall Roanoke Properties, Inc, P. 0. Box 1819 Manteo; N. C. 27984 Dear -Glenn: Enclosed please find a copy of the Information that you requested on undeveloped properties within Manteols current Corporate limits. Please note that the extensive number of Into these Properties with intense redevelopment potential were not factored could much figures. Conservatively apaaking, those properties as as double these projections. I apologize tax the ' delay in getting you these figures as the research requireQ. was quite intensive and time ,consuming. Should you have any further questions or if I may be able ,to assist in any fashion, please do not hesitate to call, Sincerely, ; .� Kermit W. skinner, Jr. Town Manager KWS;RHW Enclosures P.O. Box 246, MonMo, North Corollno 27PS4 Telephone PISL473.2133 a pox 819.473.2133 J A N = 6 = 9 2 M O N 1 8 9 2 9 . - .. P . 2 a (gown of 9811tgo MEMORANDUM Tot Kermit W. Skinner, Jr,, Town Manager QQ Fromt Fred C, Featherstone, Code Enforcement Officer nt! �- Rat Sewer Capacity of Undeveloped Lots ' in the Town of Manteo Excluding Pirate 's Cove Dater October 17, 1901 As per your, request, I have compiled a list of undeveloped lots in the Town of Manteo, To get an accurate count, I used data supplied by the Dare County Tax Office , For properties in 9-1, I calculated building size as total lot size, because in 9-1 you can cover 100% of the lot. However, I did not consider the possibility of multi-floor structures , In 8-21 i used one half the total square footage of lots to determine building size, as per 9-2 lot coverage which with parking cannot exceed 83% . As in 9-11 I did not calculate any possible building being multi-story, In summation, i feel that these projected uses and building sizes are very conservative and reflect the minimum capacity that would be required to service all remaining unimproved properties In the Town of Manteo, excluding pirate 's Cove . The gallons per day were calculated by Frank Stacho, Water and Sewect9 upervisor . act Frank Stacho Attachment AO- Box 246, MMW, North Carolhta 27934 Telephone 919.473-71lJ 6 rox 919.47l.2lis J A.N - 6 - 92 MON 10 . 29 SUMMARY OF "UNDEVELOPED" PARCELS; IN THE TOWN OF MANTEO EXCLUDING PIRATE'S COVE RARCEG 1 LAT SIZE (SO . FT- 1 BUILDING (50, F1.1, GPD*x IZONEi 2-21 4057 52, 500 26, 250 3, 150 0652 31, 800 15,900 11900 5786 28, 500 14, 250 11710 4413 44,500 22,250 21670 T268 67,730 33, 865 41064 9928 19 ,314 91657 1,159 9164 77, 220 380610 4, 633 4764 26, 731 13, 375 1, 605 2389 12, 330 61165 740 1395 6,150 31075 369 7887 22,892 11,446 11374 6629 14, 400 7, 200 864 else 7,950 31975 477 7507 680100 34, 050 4, 086 3601 11, 745 5, 872 705 0384 215,190 107, 595 12, 912 1471 24, 000 12, 000 1, 440 3273 109, 420 54, 710 61565 3676 29,920 141960 1, 795 7313 14,140 7,070 649 6143 5, 248 2,624 315 0121 61480 3 A 389 12ONE: 8-11 I / T470 26,695 26, 645 31197 $176 41800 41800 576 9911 '22,050 22, 050 2, 646 3513 10,320 10, 320 11238 6648 61080 61080 730 5379 1, 360 11360 163 5230 61300 6, 300 755 6397 81164 81164 980 0583 4,920 4,920 590 9392 22,645 *Phase 2 Waterfront 22, 6 2, 717 8-2 Potential usage . . . . . . . . . . . . . . . . . . 53 779 8-1 Potential Usage 13j,587 Town Docks . aaaa . . aa . a . . . . . . . . a . . . . . . . . . . . . . . . . . . . 500 Reai6ential Single Family ( 91 lots ) . . . . . . . . . . . . . . . 36 . 400 GRAND TOTAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104,266 **OPD Gallons Per Day 6 - 9 2 M O N 10 C 2 9 P 2 4 EXHIBIT C ' Tabulation of Costs WWTP-Dual Train 4 420,000 Aeration Basin Diffused Aeration System with Blowers Final Filters Sludge Digestion, Aerobic Tertiary Filters Concrete Construction 112,000 Field Erection 115,000 Painting 60,000 Sitework 40,000 Electrical 100,0o0 Stand-by Gen, 203,000 1001000 Costs From the 201 aroject Bid Tabulation Influent PS and Preliminary Treatment 225,000 Operations Building Chemical Feed System 1630000 Salt Press Building 1000000 Sludge holding lagoon 142,000 Effluent PS 95,000 Effluent Outfall/Diffusion 1001000 256 .000 2,253,000 Engineering - Contingency (20%) 50 000 TOTAL 2#7031000 Cost per gallon of capacity 2,7031000 + 325,000 ; 5 . 15 fuaa�ppl , 11/30/p3 O'ie\AI NYNA3p\9033. J A N 6 - 9 2 M O N 1 3 2 9 P . Z S 4 � EXHIBIT D 0Q$SNQW4 KANE 8. AN REWS lNQ, �,�, CONC US I O178 ��, o b�Q�M �NbAT 10N6 e 9. 1 CONCLUSIONSt The net result of this investigation is to document that the site can hydraulically accommodate up to i , 00o,000 gallons per day assuming that sufficient fill is . plaoed beneath the discharges into the permeable water table aquifer . There is one significant limitation with this process . This limitation is that a continuous high volume discharge of treated effluent will ultimately move off of the site in the water table aquifer or will have to ro-enter the surface water system. Considering the quality constraints for ground water under 15 NCAC 2L recollection to surface water is neoeesary . The effluent quality necessary to meet ground water standards at a property boundary are ■o strict that interception of the discharge prior to crossing the Compliance boundary is essential . All waste water disposed of using lend application wiII . resuIt in migration off of site unless It is redirected into the Surface environment. The models that wo have run was line sinks to control the hydrology of the site . ,These line sinka will 6 - 92 MON 16 : 3a1 P 26 I NO ' significantly protect the complianca boundary provided that the water that enters the ditch is moved off of the $its to either $A Waters or ghO lowbag Bay . The movement of this collected water should be classified as either recovered ground water or storm water , with water quality characteristics considerably better than that of the effluent upon disposal to the ground , Furthar improvement can be made by reducing the loading rate and using a low rate discharge on the natural .johns soils , thus creating man made wetlands. The alternatives for disposal on the bowsertown Road site include the followings 1 : construct additional rotary distributor systems in a manner similar to the existing site, ranging from 200, 000 to 300 ,000 gallons per day (5 gallons per day er square to a using sufficientf daccomdo themoundheightan $hapef hedesire flow, and raplacing all of the soil immediately beneath the disposal portion into the permeable sands forming the water table aquifer . The effluent quality will either have to meet 15 NOAC 2L limits or the water should be contained on site and diverted into the surface water system, 2. Using aimiIar constraints construct elevated infiltration basins at the game loading rate , of 5 gallons per day per square foot , The difference would be the a imination of the maehanical distributors, which may not prove effective during winter operation , 31 Design for the loading mound at 5 gallons per day per , square toot , by filling the site flanks , However , the disposal area would be excavated leaving a pond in the water table. This would aave the costs of the ,'fill and reworking the fill into the water table ., The bottom 'of 6 - 2 6 — 9 2 M O N Its 7 E 1 .. .. . FO Rt�B�'_D.,�, KAN�B AN�flEIhL;i..►..Lti�C+. the excavation will hays to bo beneath the restrictive horizon. othir HCAO 2L andints line sinksiwillostillnd water apply - 41 inf filtration basin slopedleand Lfilled gperonthermouynd height constraints . Based on the loading rate being lase than 10% of the vertical parmaabIiity of the restrictive laYar , sits excavation would not be needed, Line sinks will still be needed to accommodate the waste water volume and to protect ground water quality at the compliance boundary . Care should be made to design the permeability of the fill to lessen the contrast with the natural surface soil . The advantage of this disposal method , is that additional nitrogen, metals , phosphorous and TOX removal tan be expected in the loamy and organic soil , The drawback is the likelihood of localized hydraulic failure. The lower application rates may affect the separation to the line sinks based on 13 NCAO 2H. 5 , Using low head aprinklars install a low rate infiltration system on the natural high land and creating wetlands with a controlled mound growth . The advantages will be the additional treatment , without using any fill and providing for additional development of wetland habitats and eubsequant avapotranopiration , The drawback will be localized wet spots , that may appear to be hydraulic failure . With the underlying high parmeability, line sinks will be helpful in maintgining a hydrologic balance while protecting ground water qu4tity from an upset or inadvertent spill through the system. At a loading rate of 0 . 5 gallons per day per aquare foot, approximately 30 wetted acres will bs needed. The Bowsertown quad Site is suitable for any of these alternatives , due to the underlying water table aquifer and due to the availability of approximately 40 acres of upland area available for use, The sits is not suitable for M O W 1 S : Z 2 P . 20 �, 'gBF�w �eu,�1� pN R Way INCH standard spray irrigation, which is typically used as a treatment method at the maximum hydraulic loading rates allowed for in the Coastal Regulations of 1 . 16 inches a week , , due to area limitations ( 1 ,75 inches per week translates to 0 . 16 gallons per day per square foot) , If spray irrigation is considered acceptable for tertiary treated effluent at a higher loading rate , the safe loading rate could be determined as a function of ground water flow determinations , Standard design using a water balance equation and agronomio uptake calculations would not provide satisfactory assurances that ground water and surrounding surface water will be protected . One other possibility would be to use a combination of high rate infiltration basins and low rate low head spray disposal in the 200 foot buffers to the line ■inks . The low rate system would utilize the upper soils and fill , wheraae , the high rate would move directly into the water table aquifer prior to lateral flow, 6. 2 RE0OMMENDATION9 : • If it is determined that land application is the to be used on the site, the infiltration pond would be the least expansive to construct and' maintain . However, - such a system .. •, r. � o = 9a MON 16 : i2 P 2 9 has never been proposed in North Carolina and the concept tray be considered to be injection into the water table, If a pond is considered to be injection the concept would not be permissible , The second recommended alternative would be to consider using low head sprinklers and subsequently create man made wet lands on portions of the site. Any of the land application systems will merit the construction of sufficient lengths of line sinks ocnstructed into the water table aquifer to offset the volume of discharged water and redirect the movement back into the surface water system. • / I� e"STA�f 1 State of North Carolina 9I SEP AH it: 0 1 Department of Environment, Health and Natural Resources Northeastern Region 1424 Carolina Avenue, Washington, North Carolina 27889 James G. Martin, Governor Lorraine G. Shinn William W. Cobey, Jr., Secretary Regional Manager DIVISION OF ENVIRONMENTAL MANAGEMENT September 18. 1991 ; ��, f k�`4i'�iYC¢)♦ 1 of ' a�f�� �"vet Mr. Harry Schiffman SEP 20 1991 Salty Dawg Marina Post Office Box 489 �/A E . Manteo. North Carolina 27954 QUALITY SECTION SUBJECT: Wastewater Flow ' Manteo. North Carolina Dare County Dear Mr. Schiffman: As requested. I have compiled some recent flow figures for the Town of Manteo which are enclosed. I have hand transferred the flow figures `• for the nondischarge system (Permit 410905--the Bowsertown Road Wastewater Treatment Plant) onto the computer printout for the discharge system. Since you are also interested in making flow projections. I have enclosed a copy of my February 29, 1988, memorandum to the Director on this subject. It may provide some assistance in demonstrating the methods used to roughly approximate needs. The figures in my memorandum are dated and pertain to a specific site and a specific treatment scheme and are, therefore. not directly transferable in all respects, but may offer some indication of factors that are considered when projections are made. i If further information or clarification is required, please advise. Sincerely, 1 J m Mulligan gicnal Supervisor ` JM/awh z cc: Town of Manteo r. _. ✓Steve Tedder George Everett P.O. Box 1507, Washington, North Carolina 27889-1507 Telephone 919-9466481 FAX: 919-975-3716 An Equal Opportunity Affirmative Action Employer t- ^ / /> - yFr2882 12 : 29 : 51 TERMINAL CONNECTED TO IM%/V% IM% 89/i7/9| GKEX78/MY COMPLIANCE EVALUATION ANALYSIS REPORT PERMIT--NCO825488 PIPE--80i REPORT PERIOD : 9888 -9187 LOC---E i FACILITY~~MANTEO WWTP , TOWN OF DESIGN FLOW-- ^2588 CLAJ%--3 LOCATION~~MANTEO REGION/COUNTY-^87 DARE � 58858 88310 88538 8808 31616 5886O ( MONTH Q/MGD BOD RE%/T%% NH3+NH4- FEC COLT CHLORINE � ` 90/88 ^ 1371 i1 ^ 17 i8^ i 3. i8 5^3 ^236 L 48 � 98/89 . 1156 i8.76 8.8 5117 4 ^4 ^631 �dY 98/iO .8989 11 ^67 11 ^4 1 .84 2^5 1 ^238 ! i i827 9 47 7 8 3 .69 3 .628 ' 98/ii ^ ^ ' ^ 98/12 ^8952 13^88 13^8 ^87 3^ 6 ^694 h��7 9i /8i ^ 1578 12.28 9 .8 i ^54 8^ 7 ^533 i ^3 8 59 6 2 i i5 1 95� � D�0 ' 2 , i3O2 ^ ^ . ^ � 91 /83 . 056 8^54 4 ^ 3 1 . 12 2,7 ^576 87 8 5 i 5 i ^i 757 / 9i /84 . i42i 7^ i4 ^ ^ ^ � � �� ^ iO49 9. 13 6. 1 2^28 3^5 1 ^818 ^ (\_' �� ! 91 /06 ^0963 9^ 77 9^ 1 ^95 1 . 7 2,640 ` Jd ^i i 89 444 i 4 i 44 23 9 i ^679 9i /87 ^ i ^ ^ ^ ^ u ` | - - - - AVERAGE ^ ii84 9^76 8^5 2^82 5^8 1 ^847 /J | 88 34 O 9 88 28808O 588 ' MAXIMUM ,2558 28^ ^ ^ ^8 3^ � v J � MINIMUM ^8388 LE%%THAN LE%%THAN ^ 28 LE%%THAN LE%%THAN V UNIT MGD MG/L MG/L MG/L 4088ML MG/L | �m� OMSWrv� �•v�s State of North Carolina Department of Natural Resources and Community Development Division of Environmental Management 512 North Salisbury Smeet • Raleigh, North Carolina 27611 R. Paul Wilms James G. Martin, Governor Director S. Thomas Rhodes' Secretary February 29, 1988 M E M O R A N D U M TO: R. Paul Wilms Director FROM: Jim Mulligan Regional Supervisor Washington Regional Of ce SUBJECT: Recommendation re Application of "Coastal Regulation" (15 NCAC 2H .0400) Town of Manteo Dare County i' As requested by you during the February 16, 1988 conference in your office with the Town of Manteo, I have made further investigation regarding the application of the regulation on Coastal Waste Treatment and Disposal (15 NCAC 2H .0400) to the town's situation. This included a visit to the lant site and a meeting with town officials proposed wastewater treatment p on February 18, 1988. The town has claimed that in view of the lack of specific definition for "area-wide collection and treatment" systems referred to in 15 NCAC .0401, .0404(e) and (g) that they are "area-wide' and therefore exempt from ` ain concerns which resulted in the adoption its requirements. Two of the m ` of the regulation are clearly applicable to the Manteo situation. The need for extraordinary care when transporting and treating sanitary waste in close proximity to SA classified waters was recognized. The site under 4 consideration is immediately adjacent to open shellfish waters of Croatan Sound. The regulations were also needed in order to prevent the i proliferation of high density development using septic tanks as the means of treatment where the sole source of drinking water was from shallow aquifers 1 without continuous aquitards to protect them from the direct impact of t surface activities. The Dare County well field is less than 3 miles from the proposed WTP site and there are many shallow private wells between the two. I, After conferring with the original authors of the "area-wide" terminology of the regulation, some additional definition can be offered: if the area to be served included locations where the need for the regulation v q� -•. Pollution Pnvmtion Pays C Notd+ uolina 776n-7697 Telephone 919-733-7015 :. Po. Box 17687,Raleigh, An Equal OppoTsmip'Affirmative Action FJnpbyer R. Paul Wilms Page Two February 29, 1988 was clearly inappropriate, such as areas outside the coastal waters, not bounded by SA waters or where the surficial aquifer is not GA, then other performance and reliability criteria would be sufficient. The current Manteo proposal does not include an area wide enough to avoid the environmental problems which are the target of the regulations. The proposal does fall under the requirements of new, publicly owned facilities as specified in .0406(b) and should comply with the regulation's requirements. Section .0407 allows no exception until approval is granted by the Environmental Management Commission. It is therefore recommended that the Town of Manteo be notified that their request will require EMC favorable consideration before the permitting process can proceed. Attached are a WTP Needs Summary, the Sizing Requirements for a 1 MGD Site, and the Sizin& Requirements for a 0.75 MGD Site. These analyses are only for the site near the Manteo airport and pertain to treatment at the level and with the reliability specified by the regulation. In particular, the buffer zone calculations are for an effluent disposal bed, flow distributed by pipes laid in sand such that no ponding occurs. j JM:dm cc: Walter Taft Charles Wakild rRoger Thorpe Joe Slate i i f i iV �Fzw r Manteo WTP Needs Summary Average present flow (based on past 12 months of self-monitoring data): Bay discharge plant 108,500 gpd Rotary distributor plant 60,000 gpd total 168,500 gpd Flow Need from Population Projection (based on figures supplied in the March, 1987 land use plan) An increase from 1985 to 2000 is expected to be 60%. Assuming this trend continues and using 2010 as a target date, the 1985 population of 1000 is anticipated to double, and therefore so would the flow: 168,500 gpd x 2 = 337,000 gpd in 2010 (excludes discrepancy between 1985 and 1988 flow) rFlow Peaking (based on land use plan) Since Manteo experiences a considerable seasonability to its flow pattern, a peaking factor was estimated: : peak use in '85 - 220,000 gpd actual flow - 168,500 gpd estimated present peak - 51,500 gpd t or 30% } Accommodating the additional 30% requires: 337,000gpd x 30% = 10100 gpd ,100 gpd 438,100 gpd Pirate's Cove Although present permit is for 100,000 gpd the final build-out will require 260,000 gpd. Total flow needed is therefore 698,100 gpd or 750,000 gpd for design estimates. h I i F f q. Maneto Sizing Requirements for a 1 MGD Site Although my estimates do not project a 1 MGD need at Manteo, the town's request was for a WTP of this size. Green Area (as required by the regulation, not considering any buffers) (1,000,000 gpd) (2,500 ft2/1000 gal) 2 = 57.4 ac 43560 ft /ac Green Area Adjustment If credit is fully provided in regard to "green area" for the permitted flow which could be discharged (350,000 gpd total), then 20 acres could be subtracted from the total. 57.4 ac - 20 ac = 37.4 ac need without buffer consideration Buffer Area If the 37.4 acre site is twice as long as it is wide (902.5' x 1805') and a 50 ft. buffer is taken along 3 sides (due to proximity to public right of way) and 100 ft along the other (due to proximity to SA waters), the site becomes: (1002.5' x (1955' ) = 1959887.5 ft2 or 45 acres Of the 45 acres, 7.6 acres is buffer. i t i i i i r Cbg; E _ s: Manteo Sizing Requirements for a 750,000 gpd Site Green Area (As required by the regulation, not considering any buffers) (750,000 gpd) (2,500ft2/1000ga1) 43 acres 43,560 ft2/ac Green Area Adjustment Of the proposed 750,000 gpd, some flow is now permitted to be discharged for which no "green area" could be required except that now the Town wishes to cease these discharges and upgrade the waters. City is Bay discharge - 250,000 gpd permitted Pirate's Cove discharge - 100.000 gpd permitted Total flow proposed for elimination 350,000 gpd If "full credit" is granted for the flow to be eliminated as it pertains to the "green area" requirement, a substantial area would be subtracted out: (350,000 gpd)( 2500 ft3/1000 gal) = 20 acres 43,560 ft2/ac Of the original 43 acres, only 23 would remain as needed. Buffer Area For a 23 acre site which is twice as long as it is wide (which is the approximate s)hpe), the 23 acres (or 1,001,880 ft ) would be C" 1,415.5 ft long and 707.7 ft. wide. There are no specific requirements for the bed proposed for effluent disposal, but if the soil at the top becomes wet, it would be analogous to the 50' set back to a public right of way for surface application. On one side, SA waters are encountered, requiring a 100' set back for a total site need of: (807.7' ) x (1515..5) = 1, 110,542 ft or 28. 1 acres total of the total, 5. 1 acres is for buffer. r i i i 1 } r, ,a: 17 mGMNT f Div. Q'r "'.V STATE OF NORTH CAROLINA IN THE OFFICE OF COUNTY OF DARE ADMINISTRATIVE HEARINGS COUNTY OF DARE, a body MOTION TO INTERVENE politic and corporate (NCGS 150B-23(d) and Petitioner NCGS IA-1, Rule 24) MAY 17 1991 RE: ISSUANCE OF VS. PERMIT NO. NCO079057 WATER QUALITY BY THE DEPARTMENT OF SECTION DEPARTMENT OF ENVIRONMENT, ENVIRONMENT, HEALTH HEALTH AND NATURAL RESOURCES AND NATURAL RESOURCES Respondent The County of Dare, a body politic and corporate, through Counsel, moves the Office of Administrative Hearings and the assigned Administra- tive Law Judge, to allow this Movant to intervene in the designated contested case by right, or in the alternative, by permission and sets forth in support of this Motion: 1. The Movant claims an interest relating to the trans- action and is so situated that the disposition of the contested case may as a practical matter impair or impede Movant's ability to protect its interest 2. The Movant's claim and the subject of this contested case have a .question of law or fact in common and intervention will not unduly delay or prejudice the adjudication of the rights of the original parties; 3. The Movant attaches a pleading setting forth :the claim for which intervention is sought. This the 10th day of May, 1991. COUNTY OF DARE BY: Esquire County Attorney I P. 0. Box 500 RECEIVED Manteo, NC 27943 (919) 473-5500 MAY 2 0 1991 DARE COUNTY Legal Department PERMITS & ENGINEERING Manim, North Cuolin2 27954 CERTIFICATE OF SERVICE I, Dwight of Wheless, attorney for the Petitioner, do hereby certify that I have served the foregoing Motion on the following by depositing a copy thereof in the United States mail, postage prepaid, addressed as follows: 1. William W. Cobey, Jr. , Secretary Department of Environment, Health and Natural Resources 512 North Salisbury Street Raleigh, NC 27611 2. Honorable Luther Daniels, Mayor Town of Manteo Budleigh Street Manteo, NC 27954 3. Daniel D. Khoury, Esquire Manteo Town Attorney P. 0. Box 1584 Kill Devil Hills, NC 27948 4. Dr. George T. Everett, Director Division of Environmental Management P. 0. Box 27687 Raleigh, NC 27611-7687 This the lien, day of M•fY 1991. Dwight H. Wheless DARE COUNTY Legal Department hwn ,,, North C.wlmla ' 27954 h+.Al' 17 1991 MAY 17 1991 r`;!'ii 'nG1tdT Y'll11QUALITY �I�. SECTION STATE OF NORTH CAROLINAI AN THE OFFICE OF COUNTY OF DARE kDMINISTRATIVE HEARINGS CEIV9 COUNTY OF DARE, a body MAY*2 0 1991 politic and corporate Petitioner PERMITS*EWGINEERING Vs. d * PETIfON FOR A CONTESTED CASE * (NCGS 150B-23 et seq) DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES Respondent * * * * * * * * * * * * * * * * * * The Petitioner, County of Dare, through its duly elected Board of Commissioners hereby petitions for a contested case hearing regarding the issuance by Respondent to the Town of Manteo of a "Permit To Discharge Wastewater Under the National Pollutant Discharge Elimination System", said Permit bearing "No. NC0079057" and effective date of "April 16, 1991". The Petitioner, in support of its Petition, shows the following facts: i 1. That the Petitioner is a body politic and corporate under the laws of North Carolina as one of the State's one hundred counties; l 2. That the Petitioner's boundaries include all or portions of Pamlico Sound, Roanoke Sound, Albemarle Sound, Currituck Sound, Shallowbag Bay- and other bodies of connected waters; i I 3. That the Petitioner is charged with the responsibility of protecting the general health and welfare of its citizens ; 4. That the Petitioner is a "Person" as defined in NCGS 150B-2(7) and alleges that it is a "Party" as defined in NCGS 150B-2(5) or is a "Person Aggrieved" as defined in NCGS 150B-2(6) and has standing to file this Petition. 5. That the Respondent has caused to be issued Permit No. NC 0079057 which would allow the discharge of wastewater from a facility located at "Town of Manteo Wastewater Treatment Plant off U. S. Highway 64/264 - Manteo - Dare County" into ". . . receiving waters designated as Shallowbag Bay in the Pasquotank River Basin. .". - COUNTY Department North Carolina 3795t I� 6. That the' Respondent's issuance of Permit No. 0079057 allowing wastewater discharge into Shallowbag Bay has substantially prejudiced the Petitioner's rights and duties to assure its citizens ' health and welfare; 7. That the Respondent exceeded its authority, acted erroneously, failed to use proper procedures and failed to act as required by law or rule in that, among other things: a. the Respondent failed to require sufficient evidence to determine. that wastewater discharge into Shallowbag 'Bay has the least adverse impact on the environment of all practicable alternatives; b. the Respondent failed to give required Notice to Petitioner of its intent to issue Permit No. NC 0079057; C. the Respondent failed to recognize the significant public interest in the subject of a Permit which would allow 1 million gallons per day of wastewater to be discharged into a primary recreation and fishing area, and failed to hold a public meeting to obtain comments, exhibits and documents prior to granting the permit. WHEREFORE the Petitioner requests that: 1. the Respondent's action be reversed; 2. Permit #NCO07957 be cancelled; 3. appropriate other relief should be granted. This the 10th day of May, 1991. COUNTY OF DARE 11 ^ Dwight H. Wheless, Esquire County Attorney State Bar # 4673 P. 0. Box 500 Manteo, NC 27954 (919) 473-5500 DARE COUNTY Lcg21 Department Kamm, North Carolina 27954 VERIFICATION Louise Dollard, being first duly sworn, deposes and says that she is Chairman of the Dare County Board of Commissioners, Petitioner in the above entitled action, that she has read the foregoing Petition and that the same is true to her own knowledge and belief except as to those matters and things stated on information and belief, .and as to those matters, she believes them to be true. Louise Dollard, Chairman Dare County Board of Commissioners o�at��ny� SWORN TO AND SUBSCRIBED f\� STq� � BEFORE ME THIS THE 13 £ V 0 DAY OF 1991. %01ARY _ rrt NOT Y PUBLIC My Commission Expires: O94FCOUNtV,,.;p 1 b - l is 4 5 �nnum 0 CERTIFICATE OF SERVICE I, Dwight of Wheless, attorney for the Petitioner, do hereby certify that I have served the foregoing Petition on the following by depositing a copy thereof in the United States mail, postage prepaid, addressed as follows: 1. William W. Cobey, Jr. , Secretary Department of Environment, Health and Natural Resources 512 North Salisbury Street Raleigh, NC 27611 2. Honorable Luther Daniels, Mayor Town of Manteo Budleigh Street - Manteo, NC 27954 3. Daniel D. Khoury, Esquire Manteo Town Attorney P. 0. Box 1584 Kill Devil Hills, NC 27948 4, Dr. George T. Everett, Director Division of Environmental Management P. 0. Box 27687 Raleigh, NC 27611-7687 This the /6"-4 day of —�Y 1991. DARE COUNTY Legal Department M=m, North Carolim Dwight H. Wheless 27954