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NC0063321_Authorization to Construct_20020430
NPDES DOCUMENT SCANNINO COVER SHEET NC0063321 Cashiers WWTP #3 NPDES Permit: Document Type: Permit Issuance Wasteload Allocation ( Authorization to Construct (AtC) M'.nr.:.ws:fMSl lsl a . Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Meeting Notes Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: April 30, 2002 This; document is printed on ire -mete paper - ignore any content on the reYerne wide State of North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross, Jr., Secretary Gregory J. Thorpe, Ph.D., Acting Director Mr. Jerry R. King, Director Tuckaseigee Water and Sewer Authority 32 Asheville Highway Sylva, NC 28779 Dear Mr. King: AVA NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES April 30, 2002 Subject: Authorization to Construct Permit Issuance ATC Number 063321ACF Cashiers WWTP NPDES Permit NC0063321 Jackson County A request for an Authorization to Construct (ATC) was received by the Division February 24, 2000 and final plans and specifications for this project have been reviewed and found to be satisfactory. Authorization is hereby granted for the expansion of the Cashiers Wastewater Treatment Plant from 0.1 MGD to 0.2 MGD. Specifically, this ATC allows the installation of: • 25,000 gallon equalization basin, • 100,000 gallon extended aeration basin with coarse bubble diffusers, • dual circular clarifiers (20 ft. diameter, 12.5 foot side water depth), • dual multi -media filters (5 ft. diameter, 39 in. depth) with air/water scour and - • backwash tank and holding tank • backwash pumps • dual backwash holding pumps to deliver backwash to head of the plant • dual chlorination basin (appx. 5400 gallons) with chlorine feed and sulfur dioxide dechlorination, • post aeration (appx. 4100 gallons), • 25,000 gallon digester with coarse bubble diffusers, • RAS/WAS pumps, dual pumps with variable speed drive, • 2 new blowers to deliver approximately 682 cfm each, • and all additional piping, valves, control equipment and appurtenances. The following conditions must also be met with this permit: • The existing filters should be thoroughly evaluated to determine why they are not operating in an optimal manner. Design of the filters appears adequate. The most current inspection report indicates that the filters have been inoperable in the past. A report stating what has been evaluated and what will be done to improve operation of the filters should be submitted to the Asheville Regional Office, Water Quality Section, by June 30, 2001. 1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE 919-733-5083/FAX 919-733-0719 AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/ 1 O% POST -CONSUMER PAPER VISIT US ON THE WEB AT http://h2o.enr.state.ric.Us/NPDES • Mi. King NC0063321 2 • The existing clarifiers are overloaded during peak flow times. If Tuckaseigee WASA does not proceed forward with this expansion, the Division will require that the Tuckaseigee WASA provide additional clarification to accommodate peak loading. Once construction under this ATC has been completed and an Engineer's Certificate has been submitted, the permittee is authorized to operate the treatment units listed above and the permitted flow will be increased to 0.2 MGD, with permitted limits as specified in the NPDES permit issued April 21, 1998. This Authorization to Construct is issued in accordance with NPDES Permit No. NC0063321 issued April 21, 1998, and shall be subject to revocation unless the wastewater treatment facilities are constructed in accordance with the conditions and limitations specified in the permit. The sludge generated from these treatment facilities must be disposed of in accordance with G.S. 143-215.1 and in a manner approved by the North Carolina Division of Water Quality. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement wastewater treatment or disposal facilities. The Asheville Regional Office, telephone number (828) 251-6208, shall be notified at least forty- eight (48) hours in advance of operation of the installed facilities so that an in -place inspection can be made. Such notification to the regional supervisor shall be made during the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays. Upon classification of the facility by the Certification Commission, the Permittee shall employ a certified water pollution control treatment system operator to be in responsible charge (ORC) of the water pollution control treatment system. The operator must hold a certificate of the type and grade at least equivalent to or greater than the classification assigned to the water pollution control treatment system by the Certification Commission. The Permittee must also employ a certified back-up operator of the appropriate type and grade to comply with the conditions of Title 15A, Chapter 8G, .0202. The ORC of the facility must visit each Class I facility at least weekly and each Class II, III, and IV facility at least daily, excluding weekends and holidays, and must properly manage and document daily operation and maintenance of the facility and must comply with all other conditions outlined in Title 15A, Chapter 8G, .0204. Once the facility is classified, the Permittee must submit a letter to the Certification Commission which designates the operator in responsible charge within: (A) Sixty calendar days prior to wastewater being introduced into a new system or (B) within 120 calendar days of the following, (i) after receiving notification of a change in the classification of the system requiring the designation of a new ORC and back-up ORC or (ii) a vacancy in the position of ORC or back-up ORC. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the facility. The Operational Agreement between the Permittee and the Environmental Management Commission is incorporated herein by reference and is a condition of this Permit. Noncompliance with the terms of the Operational Agreement shall subject the Permittee to all sanctions provided by G. S. 143-215.6 for violation of or failure to act in accordance with the terms and conditions of this Permit. Failure to abide by the requirements contained in this Authorization to Construct may subject the Permittee to an enforcement action by the Division of Water Quality in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. Mr. King NCQ063321 3 The issuance of this Authorization to Construct does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction. Upon completion of construction and prior to operation of this permitted facility, a certification must be received from a professional engineer certifying that the permitted facility has been installed in accordance with the NPDES Permit, this Authorization to Construct and the approved plans and specifications. Mail the Certification to the NPDES Unit, Division of Water Quality, 1617 Mail Service Center, Raleigh, NC 27699-1617. One (1) set of approved plans and specifications is being forwarded to you. If you have any questions or need additional information, please contact Ms. Susan A, Wilson, telephone number (919) 733-5083, extension 510. Sincerely, 47471-+ "fegory J. Thorpe cc: Central Files DES Unit, Permit File Asheville Regional Office, Water Quality Technical Assistance and Certification Randy Beckner, P.E. Mattern & Craig 12 Broad Street Asheville, NC 28801 SPECIFICATIONS FOR CASHIERS WWTP EXPANSION TUCKASEIGEE WATER & SEWER AUTHO ' Y COMMJSSION NO. 1457H February 2000 frici‘•" 9 • SEAL 20366 ‘8,;••.4"/CItif tvadtestsif. os. MATTERN & CRAIG CONSULTING ENGINEERS • SURVEYORS 12 Broad Street ASHEVILLE, NC 28801 DErRR - WATER QUALITY POINT SOURCE BRANCH .r, _..• APPROVED North Carolina Enviitinmental- • Management Cmnitilesion Division of Water car Dab {�2ii. ?i�o ,gpo2 Pewit #.....„,0C..006 33U. ti71;A' (Avei A s Corr A- S Paitst9A) S M4�e CP 1PCW to w 1114 ,1-T C- F Mur (4 L t 4/oloZ DESIGN COORDINATOR: Wm. James Jones,P.E. (828) 254-2201 J. Wayne Craig Stewart W. Hubbell Gene R. Cress Michael S. Agee Steven A. Campbell Randy W. Beckner SINC Mattern & Craig 1978 CONSULTING ENGINEERS•SURVEYORS APR 1 0 2002 L't IR • NrATER QUALITY F(li-ii SOURCE BRANCH .ril 5, 2002 Susan Wilson, NPDES Unit NCDENR, Division of Water Quality Suite 942, 512 North Salisbury Street Raleigh, NC 27699-1617 Dear Ms. Wilson: Wm. Thomas Austin Bradley C. Crag David P. Wilson Edwin K. Mattern, Jr. (1949-1982) Sam H. McGhee, III (Retired) Re: Cashiers WWTP ATC Permit No. 063321 ACF Comm. No. 1457P This is to certify that the revised foot print for the above referenced project as reflected on Plan Sheet 3 revised 2/13/02, conforms with the buffer requirements set forth by 15A NCAC 2H.0219 (j)(5). If you have any questions, please feel free to call. .1/4`0sot CAR ctit;, SEAL 20377 t 8 ,,,,,, RWB/ppb Sincerely, MATTERN & CRAIG ce, Randy W. Beckner, P.E. Principal cc: Jerry King, Tuckaseigee Water and Sewer Authority • 12 Broad Street, Asheville, North Carolina 28801 (828) 254-2201 Fax (828) 254-4562 F VVATE9 r Michael F. Easley Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality Water Quality Section/ NPDES Unit FAX TO: Randy Beckner, P.E. Re.: Cashiers/ TWASA ATC FAX: (919) 33-9919 4(02 FAX NUMBER: 423 245 5932 FROM: Susan A. Wilson, P.E. PHONE: 733-5083, ext. 510 NO. OF PAGES INCLUDING THIS SHEET: 1 Randy - based on our conversation 3/20/02, I still need your stamp and signature confirming, if so, that the plant layout conforms with the buffer requirements set forth by 15A NCAC 2H .0219(j)(5). Specifically, that the plant is: • 100 ft. from any residence • 100 ft. from any water supply source • 50 ft. from any stream, marsh, etc. • 50 ft. from any property line (This was required with the letter dated March 6, 2001, Item 11, and is required with any change in footprint of the plant). I am satisfied with the other items of the submittal. I'll be forwarding the ATC up to my supervisors again for their review and concurrence (since there were public comments/concerns on this expansion). I'll do that ASAP - and include your statement on the buffer requirements after I receive them (that will not be holding anything up as long as you can get that back to me fairly soon). Kevin Barnette with ARO is out on vacation - I have not received any comments from him on the revision, but I'll be leaving him an e-mail and notify you if I do (other than the residuals holding capacity and the concern about the filters, I don't remember that he had additional comments). Thanks Randy. Susan ATC SUMMARY SCOPE Cashiers WWTP Tuckasiegee WASA ATC No. 063321ACF UT Chattooga River, B-Trout ORW Savannah River Basin, 031301 Jackson County The scope of the project includes the addition of a parallel treatment system to expand the permitted flow from 0.1 MGD to 0.2 MGD. The proposed project provides additional EQ capacity, new chlor/dechlor facilities, additional tertiary filtration, post aeration, as well as extended aeraion/clarification. Two new circular clarifiers will be added with this expansion. The new circular clarifiers theoretically should provide better treatment during peak flows (existing clarifiers are actually undersized for peak loads). REVIEW SUMMARY Executive Summary The subject facility received the most recent NPDES renewal permit April 21, 1998. A public hearing was held regarding the NPDES permit. The Director approved the issuance of the permit with the phased flows of 0.1 MGD and 0.2 MGD [the 0.2 MGD flow limits were held at constant loading]. The facility was required to install standby power and noise reduction on the blowers. The facility is currently at 0.1 MGD permitted flow. Per ARO, the facility does experience peak flows during the summer months. DWQ has received letters and phone calls from citizens objecting to the expansion. This ATC will be forwarded for review and approval. Project Number: (1457P) Applicant: Mr. Jerry King Tuckaseigee WASA P.O. Box 1051 Sylva, NC 28779 Application/Plans Prepared by: Randy Beckner, P.E. Mattern & Craig 12 Broad Street Asheville, NC 28801 Significant Dates: Received: 2/24/00 RO comments: 5/10/00 (and again 3/01 & 6/01) Reviewed: 12/00 (and again 7/01; and again 10/01) Addinfo (via fax): 10/8/01, clarification on many issues Received addinfo: 11/5/01 Submitted to Supervisors for review: 11 / 19/01 (Discussions prior to Christmas Holidays - should send another addinfo to consultant regarding sludge holding tank and aeration in EQ basin) Addinfo (after discussion with consultant 1 / 14/02): 1 / 15/02 Received additional info (from inquiry 1 / 15/02): 3/13/02 Faxed request for buffer requirements 4002 02 4 Project Location: Jackson County 1 Quadrangle: G6SE Facility status: Existing Wastewater source: Domestic Estimated Project Schedule: Unknown - dependent on funding availability Submissions: • Letter of Transmittal • Engineering Plans / Specs Reference: Metcalf & Eddy, 3rd ed. I0 States Standards Equalization basin: 1 - new, - 25, 000 gallons (confirmed), with coarse bubble diffusers Equalization required (25% of permitted flow (0.2) = 50,000 gals.) Existing EQ = 25,000 gals. Total EQ = 50,000 gals Plan configuration indicates flow may be transferred between both. Aeration basin: 1 - new, - 100, 000 gallons (confirmed); coarse bubble diffusers Existing = - 100,000 gallons Dt = 24 hrs (extended aeration, OK) Air requirements (for aeration basin) : Mixing - 25 cfm * aeration volume (gals)/ 1000 * 7.48 = 668 cfm (using 200,000 gals. aeration volume) BODS & NH3-N removal BODS = (225 mg/1- 15) * 0.2*8.34 = 350 lbs BOD5/day * 1.5 = 525 lbs 02/day NH3-N = (25-2)*0.2*8.34 = 38 lbs NH3-N/day * 4.6 = 175 lbs 02/day Total air requirement = 700 lbs 02/day CFM = lbs 02/day / (density of air * % 02 in air * 02 transfer eff of coarse bubble diffusers * 1440 min/day) - compensating for 3440 ft elevation difference (effects density of air) = 700 / (0.066 * 0.2 * 0.075 * 1440) = 491 cfm Air supplied (new) 2 @ - 682 cfm = 1364 cfm (slightly lower with elevation) Existing air (per consultant) = 553 cfm Total air = 1577 cfm Air (for mixing, general) = 25 cfm * aeration volume (gals) / 1000 * 7.48 = (25*200,000)/(1000 * 7.48) = 668 cfm 2 Clarifiers: 2 - new, - 20' Dia., 12.5' - SWD (typical, OK), prefabricated steel construction Existing = 12' x 24' x 14'-6", SA = 288 ft2 Loading = 100,000/288 = 347 gpd/ft2; Peak loading = 250,000/288 = 868 gpd/ft2 (high, > 800 gpd/ft2)) * NOTE: The existing clarifiers, while not being removed, will not need to be used with the expansion - and are not intended to be used for clarification with the expansion. The new dual circular clarifiers will be able to accommodate the entire expansion flow of 0.2 MGD. Volume (of 1) = -29,400 gal. Loading = 100,000/ 314 = 318 gpd/ft2 (each, OK, ME, p.588) Loading (peak) = 250,000/314 = 796 gpd/ft2 (OK, M&E) Weir = 112' ; weir loading = 888 gpd/ft (OK) Dt =-29,400/100,000 * 24 = 7 hrs (at Qavg); > 3 hrs, OK (The second clarifier will meet this same criteria). Filters 2- new, 5' - dia; 39" depth; tri-media, anth. /sand/gravel [dual filters, 1 unit with (water & air scour) backwash pumps, tank, etc.j. Existing - 2 (same dimensions as above) SA = 19.6 ft2 Loading = 100,000 gpd/ (19.6 * 2) = 2551 gpd/ft2 = 1.77 gpm/ft2 (OK, M&E, p.681, 2-10 gpm/ft2) Peak = 4.4 gpm/ft2 (OK, 10 S.S.) Backwash tank & holding tank volume: 2950 gals. Backwash pumps: deliver minimum of 15 gpm/ft2 Backwash holding pumps: 2, each at 70 gpm (100,000) @ 14' TDH [delivers backwash water to head of the plant/ EQ1 *NOTE: There have been comments that the existing filters are not properly functioning (this was brought up in the inspection report). This information was also passed along to the consultant with the addinfo fax sent 10 / 8/ 01. This information was also verbally passed along to the consultant and it was recommended he pass it along to the owner (a statement regarding O&M of the filters will be put in the ATC). However, the design specs at average and peak flow theoretically appear fine. I cannot comment on this as far as the design of the filters are concerned. Chlorination/dechlorination New - dual chlorine contact basin with dual dechlorination (Ci2 and SO2); dual feed with automatic switchover on chlorine. Chlorination basin volume: -5400 gal (total) Dt = 5400 gal/200,000 gpd = 39 minutes, (OK); 15 min. at Qp (OK) Post aeration: New - volume -4100 gal Dt = -4100 gal/200,000 gpd = 30 min. (OK) 3 Digester • Based on design revision received 3/13/02, the consultant redesigned the new digester for volume of 25,000 gals. New - - 25,000 gal. With coarse bubble diffusers Existing - 15,110 gals (per consultant) TOTAL VOLUME: 40,000 gals. (Aeration volume was increased accordingly) Needed volume (for 30 d holding) : = 0.2 *8.34 * (220-15) * 0.65 #sludge/# BOD5 removed = 222 # sludge/d 222/(0.02*8.34) = 1331 gal/d * 30 d =-40,000 gals 0.2 * 8.34 * (220-15) * 0.75 #sludge/#BOD5 removed = 256 # sludge/d 256/(0.02*8.34)=1538 * 30 d = - 46,000 gals (0.65-0.75 lbs VSS/lb BOD5 - M&E, Table 8-7; 2% solids, M&E, Table 12-8] -or- 10 SS (Chptr. 80, 85.31), Extended aeration activated sludge = 3 ft3/ Population Equivalent Pop. Equiv. (P.E.) a. 100 gpd/person (assumed, ref. M&E) Needed volume= 3 ft3 * (200,000 gpd/ 100 gpd/person) = 6000 ft3 = - 45,000 gals. (The consultant has provided adequate calculations indicating that 40,000 gals total capacity is required to conform with the 30 day holding time. This will be adequate.). NOTE: This facility has residuals hauled by a septage hauler to a local POTW (not a land application site) . RAS/WAS pumps 2 variable speed drives; 25 - 104 gpm (67' to 6' TDH) Total air: EQ = 1.25 - 2 cfm/ 1000 gals [M&E] * 50,000 gals = 62.5 - 100 cfm (must provide 10-20 cfm/ 1000 ft3); (with the 3/02 revised plans, consultant added 25 cfm/1000 ft3, for a total of 84 cfm to the new EQ basin) Digester = 30 cfm/ 1000 cf * cf/7.48 gal * 40,680 gals = 163 cfm (revised to this with 3/02 plans, for 40,000 gal capacity) Post air = 20 cfm/ 1000cf * 875 cf = 17.5 cfm Total air supplied (1917 cfm) : 2 @ - 682 cfm (new train, 2 new blowers) 553 cfm supplied for the existing train (2 blowers). Adequate to meet the estimated air requirement of (668, total aeration basins + 163, total digesters + 167, total EQ + 60, air lifts + 25, post air) = 1083 cfm Like the existing blowers, the new blowers will be insulated and enclosed. Standby Power: Engineer has submitted signed/sealed statement indicating that current standby power is adequate to handle additional components. 4 c Synopsis of Public Comrnents & Summary of Project I have received several letters on this project and have spoken with concerned citizens in the Cashiers area. The written comments are submitted with the package for the ATC. Summary of comments: • One request to not issue the ATC permit • Complaints re. noise/odors • Concerns regarding adequate water supply (there is no community system in Cashiers - homeowners have individual well systems). • Concern over adequacy of package plant to meet limits • Concern over pollution in stream • Concern over adequate buffer between treatment plant and homes • Concern over loading and peak loading at the existing plant and for the proposed plant The Cashiers WWTP (Tuckasiegee WASA) was originally permitted in 1986. This portion of the Chattooga River and headwaters were classified ORW in 1989. Due to public comment and concerns, a public hearing was held on the NPDES permit renewal January 12, 1998. (The flow of 0.2 MGD was contained in that draft permit and the permit prior to that one; the plant is currently operating at 0.1 MGD) . The hearing officer recommended issuance of the permit with the requirement of standby power and noise reduction for the blowers (enclosed, insulated) . The plans/specs were reviewed to determine the ability of the new and existing plant to meet the more stringent requirements for the flow of 0.2 MGD. The plant, theoretically, and if properly operated and maintained, should be able to comply with the limits for 0.2 MGD design flow. The proposed components were evaluated for the design flow of 0.2 MGD and for peak flow conditions. Buffer requirements are met. Existing standby power is adequate to run the new components. The new blowers will be enclosed in an insulated building, similar to the existing blowers. Due to concerns over the operation of the existing filters, a clause will be put in the ATC stating that the owner fully evaluates the operation/maintenance of the existing filters to determine any cause of problems. The existing clarifiers are not sized to adequately handle peak flow conditions. Since there is still some concern as to whether or not Cashiers will receive funding for the expansion, a clause will be put into the ATC that Cashiers must reassess/modify the existing clarifiers should expansion not take place and the new dual clarifiers not be built. 5 • • Chronology of Events: 4/21/98 - NPDES permit (most recent) issued after public hearing with the following limits: Parameter Flow , 0.1 MGD 0.2 MGD BOD5 30/30 mg/1 15/ 15 mg/1 NH3-N No limit 2.2/ 4.8 mg/1 D.O. 6mg/1 6mg/1 TSS 30 mg/1 30 mg/1 Fecal coli 200 #/ 100m1 200 #/ 100 ml Tot. Res. Chlorine 28 ug/1 22 ug/1 Spec. conditions: Noise reduction, standby power, sewer line approval 9/30/96 - ATC for expansion from 0.1 MGD to 0.2 MGD. 10/9/98 - ATC issuance (ACC) for standby power and noise reduction. 10/29/98 - Returned ATC request - didn't have correct information. 1 /25/99 - ATC resubmital request. 9/ 1 /99 - Returned ATC request because ATC (ACC) was not yet built - couldn't accept until standby power and noise reduction were completed. 4/27/00 - Accepted ATC request dated 3/6/00 - the current ATC request to revise 1996 request for expansion. 3/14/02 - Division received the renewal request for the NPDES permit (acknowledgement letter 3/14/02) 6 REc ib 6't 5JLJ �2�ypo v 5Z i? Mattern & Craig CONSULTING ENGINEERS• SURVEYORS J. Wayne Craig Stewart W. Hubbell Gene R. Cress Michael S. Agee Steven A. Campbell Randy W. Beckner Wm. Thomas Austin Bradley C. Craig David P. Wilson Edwin K. Mattern, Jr. (1949-1982) Scan H. McGhee. III (Retired) March 6, 2002 NCDENR, Division of Water Quality Susan Wilson, NPDES Unit Suite 942, 512 North Salisbury Street Raleigh, NC 27699-1617 Re: Cashiers WWTP ATC Permit No. 063321ACF Comm. No. 1457P Dear Ms. Wilson: The following are our responses to your comments of January 15, 2002: 1. Aeration has been added to the EQ basin. Revised air calculations are attached. 2. The sludge holding tank has been revised to 25,000 gallons, providing atotal of40,000 gallons of holding capacity. Revised calculations are attached. 3. No response required. 4. A revised piping Plan Sheet 3 is enclosed. Also enclosed are revised Plan Sheets 3A, 4, 4A, 9, 9A and 14 reflecting these changes. If you have any questions, please feel free to call. RWB/ppb _.H11tltriit eettotuttttN s • • • • • • • 41. .1110 .16 Sincerely, MATTERN dz. CRAIG Randy W. Beckner, P.E. Principal cc: Jerry King, Tuckaseigee Water and Sewer Authority Kevin Barnette, Asheville Regiot*.al Office 12 Broad Street, Asheville, North Carolina 28801 (828) 254-2201 Fax (828) 254-4562 9. Drive System a. A V-belt or coupling drive may be used. An appropriate service factor shall be applied. A suitable guard meeting OSHA specifications shall be supplied. b. The motor shall be sized for appropriate horsepower, RPM and other appropriate electrical characteristics as determined for the application, but shall be 20 horsepower as a minimum. 10. The blowers shall be Universal RAI, as manufactured by Roots Division of Dresser Industries, Inc. Each blower shall be capable of producing 682 SCFM @ 5 PSI at sea level, 70F. Project site elevation is 3440 feet. Blowers shall deliver the required volume at 3440 feet at 90F. Motor shall be 30 HP, 240 VAC, 3 Phase. 11. Non -corrosive autotrol flexcap coarse bubble air diffusers shall be spaced approximately forty eight (48) inches apart and located along one wall of the process tanks. The diffuser drop pipes shall be galvanized steel sch. 40 one inch minimum inside diameter and each assembly shall be designed and installed so as to be removable for cleaning without disturbing the operation of the plant. Each drop pipe shall be equipped with an air control valve and union for quick disassembly. 12. All valves shall be bronze/brass body full port 1/4 turn ball valves. 13. Blowers shall be enclosed in an insulated, fiberglass enclosure with positive ventilation to operate one blower at full design without overheating. Enclosure shall be manufacturers standard colors, to be selected by engineer. Enclosure shall be designed for outdoor use, and shall include UV inhibitors. F. SURFACE PREPARATION AND CORROSION PROTECTION 1. All steel surfaces shall receive a near white blast to remove rust, mill scale and weld slag. Blasting shall be accomplished indoors using steel shot to produce a mil profile for optimum adhesion of the paint. Sand blasting shall not be accepted. 2. All prepared surfaces shall be thoroughly dry and free from preparation dust and foreign matter prior to the application of any coating. Craftsmen applying protective coatings shall be thoroughly familiar with the application guidelines and preparation requirements of the product to be applied. All materials shall be evenly applied and shall be free from obvious defects. 11251 - 6 Mattern & Craig PROJECT e-ra t w w TYPE CONTENTS 3 t.,_.I o g.. s te% 4 L� CONSULTING ENGINEERS•SURVEYORS DATE Z _ . o COMM NO. PREL. FINAL I ,- SHEET NO. CAL. BY lan y--) CKD.BY IA 5 5 G' •.. cs c a r11 / ,Q Irf �bs j !b 0-0 gQfriai J llob 0m(.1 ite, 3g4 t 7-4''-is) 9eZ.r1�' 3 01 L 6_5 5 lts z y C... tot-4 c c... fi atr C:i`( T/z— 0 3 n d• 7 5" = 32— 1\.s L. 1 !o 0 . d L. -3� 7, 't v [...A-( ! 3 .5- Co l9 r`s tiK 3 v D l 1 3. 1, 4- (--e IEXHIBIT ,Z7(1 1978 Mattern & Craig PROJECT a ✓a b 14tae.4 w 14.1 r�► TYPE CONTENTS ' ?D J , rr a",4 t_ 4 Iiz.. IZt t . CONSULTING ENGINEERS•SURVEYORS DATE z • I ?- 0 L COMM NO. PREL. FINAL - SHEET NO. CAL. BY t%•De-t CKD.BY J-U a 177 O f A/ r4 t- "4- 1 /Z, r _ or L J t► a." /4. AD M f yi,v b t izr. Vr 4 +r-, e. r L1 pI to f3 e3 Lr,c..d. IZ L. 1"' /o R- ,12 z to - `to C-1:711-1 / 000Fri u .1 a- 3 v t oov Fri d Lo o Lep'1 x SFr /.„ 1 l0 3 i=4. 13i p ss,J V = Z s; o� ca �--P 1� �, ,►..% C fie^ J -- Zo-3o C,tc"r1 t d o • mr-' S 1 - L. . - 0....r/ / Er-% ! L- ly pD. d37.3 E.I`A d- p, 3' 7 33 c "' t"7"3 7 itze !v-( EXHIBIT PROJECT C_A 4 Mattern & Craig CONSULTING ENGINE R.S•SURVEYORS TYPE CONTENTS A GALA i 7e rJ DATE COMM NO. PREL. FINAL SHEET NO. CAL. BY CKD.BY /4 Gr le- Art vtit b� �G.s trQ, 54 ssw1 A 114. ' sr 4 ttt.. . + i2- 13 L. 0 w Lrn.. Cl.o Fa. a' FOIL Pr, 3 5-0 io 3 1 °TA t... r'eill_ 4-0 oc'c,� 3 a — t7nq a Tit-Alei Z 5` Z•2 3, cz-t' C07004ciTy) 1-1../ 0 c w are4 /Z- ,P Lo4 ,✓ r) 7 5o to .3 EJ Z. Ltd/ in, "/ t, ' b L t u./ L r.;. c_ac r A r- /-L 01.v r— IQ-Gle-ionaaJ 14 l tt. Pasr ,4,,t et 344o t 7 "v° et,/ S "7,5fI. Pi L L,r-.r-t EXHIBIT PROJECT e Fa,* k,4_.s TYPE CONTENTS z� COL .5 1r 1-1-1LTir/ •� 1978 Mattern & Craig CONSULTING ENGINEEIZS•SURVEYORS DATE z. - z COMM NO. PREL. FINAL SHEET NO._ CAL. BYO CKD.BY M► 1~w o B L-a w t rp..4 `' 6 iE- pi.-.¢.vr— o.. s c. y EXHIBIT PECIEICATIONS Rootsiegrei3w-eia� o ROTARY POSITIVE BLOWERS, FRAMES 22 THRU 718 OPERATING PRINCIPLE F,srnr:r:t 9e.il1C42 F Tn:)N3 f"JSITX:r4 4 Two figure -tight tcbe in -.peters mol:nled can parallel shahs rotate In opposite clirecticns. As each impeller passim the blazer intr3t, i1 traps a Ce.linife volume of sir and carries it erctlrrJ the coo lo Ilia blower euilel, where the air Is Clsci' arged. With constant sr -and cperaticn, the displaced vclume. Is essentially the same regardless of (:ro.sero, ;ornparature o: Caromutric pressure. Timing gears control the relative pasifirn of the impellers to each other sty.] tozir.1ain small but delirJlc ciea.renous. This arows cpralien being required inside the sir casing. OUTLINE DRAWING & DIMENSIONAL TABLE INLET 8 CiSCHAR3E CONNECTIONS TQP D4CHAR GE -• PAF TOR _ AX SHAFT - :. AX 1. 7.o DI 1 I-- I -I BOTTOM SHAFT - LEFT C63CHAADC VERTICAL CONFIGURATION A r--A- BOTTOM DISCHMICE AIGHT DCSCHARGE HOR ONTAL COIIFIGURATiON Friri•sill:, ' A f5 C ; Drier 0dt kcdoa' O : a .' , P R Hat.Dla U .144nra� r 1rJeq S c* eh. • .• • A$ 1 Alt; AyaL. I4.t t 1U ^D' ; &iaie Us& D1 To Rur1 02 Rn11 22 24 32 33 36 42 45 47 53 34 69 03 611 615 70 711 719 6.13 5.13 7.23 7.1'5 7.25 coo a.CO 8.00 1050 1030 1050 11.00' 1100' 1100* 1400" 14.1X.r' 14.0 -- 5.00 7.00 6.75 7.6.5 10 00 7.25 tow 11.75 83a 11.00 141)3 10 03 13.07 2000 11.7.5 1675 2375 0.75 11-75 1125 12.13 14 63 law 1550 17..63 1.531 16.0D 21.1a 19.37 21.33 2433 19.94 25.13 32.19 3.75 3 75 6.00 500 6-00 8.25 625 625 623 6.25 425 9.75 475. 4.75 11.0) 1150 11,3.) 6.25 47.5 9.50 43) S.50 l•0.:6 10.25 1025 11,2,, 1125 11.75 14.76 14.75 14,75 18.00 1444) 18.00 3.71 3.73 5.0.1 5.0: 6.0) 6.:7 6.2515,0610.63 6.23 6.75 6.75 073 4,75 8.73 0.75 1 3.40 11.34) 11.00 2,.1 0,(7 12.11 1241 12.81 13.0-1 15.c6 1739 1736 17,36 21.63 21 as 21,63 28.13 26.13 26.13 Ono 0 80 8.96 000 8.138 10r,3 1030 11.35 1225 12 25 15.1 e 15 13 15.25 20 03 19 0) 19.50 1735 6 26 7.75 7.76 7.75 075 8.75 053 1025 1130 11 03 12.75 12.75 15.63 13 3r 17.0) 17.05 5174. 6 00 875 6.75 6.75 925 8.25 025 8.75 ars &75 11.75 11.75 11.75 14.50 14.50 14.50 ,(23 .625 .730 .760 .733 .676 .876 .976 1.12s 1,125 1.125 1.373 1.375 1.375 1,5(12 1S66 t .188 x.304 .188 x.004 .140x,034 .168x.034 .13D x ,74 .108f:1)94 .taax.CA4 .189x.0.14 .253x.125 .250x.125 .253 x .121 .317 x ,15.6 .312 f:.155 .312. x.130 .37.5 f:.163 .375 x.1113 .3751 .103 1.0 NPT 2.0 1.4PT 125!VT 2.0 WI 2.3 t4 T 1.514PT 255IIPT 3.0.111T 2.51a•T 4.31.0T 4.0I'41.7 3,0 Na7 5.0 t4PT 60FLG 4.0 N'T 40 rLG 8.0FLG 9.25 9.25 12.13 12.13 1213 110 13.63 1369 17.25 17 17,25 19.75 12.77 19.76 23.25 2325 2,3. 6 1.25 1.73 1.75 1,73 1.75 7.40 2.00 2.01 2.50 2.50 2.50 3 3d 340 3.0 350 3.50 350 32 43 fd 74 102 00 109 12a 143 173 261 245 205 425 403 530 656 - ' 17,0) in h rizOnlal uxli uvlirl A$ Oinanimi 91 L'd14d :1.Cn r, t.:rtr .:11 ryy41;tr. 1 qr. BASIC BLOWER DESCRIPTION Universal RAI blowers are heavy duty rotary blowers designed with detachable rigged steel mounting feel, which permit easy in -field adaptability to either vertical or horizontal Instal- lation requirements. The Universal RAI blowers can even be hung tram overhead supports. Because of the detachable mount- ing feet, these units can be easily adapted to any of tour drive shaft positions - right hand, left hand, bot- torn or top. The compact, sturdy design is engineered for continuous service when operated in accordance with speed and pressure ratings. The basic model consists of a cast iron casing, carburized and ground alloy steel spur timing gears secured to steel shafts with a taper mounting and locknut, and cast iron involute impellers. Oversized anti• friction bearings are used. with a cylindrical roller bearing at the drive shaft to withstand V-belt pull. The Universal RAI features thrust con- trol, with splash oil lube on the gear end and grease lube on the drive end. After standard tests, the unit is sprayed with a protective paint and boxed or placed on skids. Available accessories include driver, relief vahve, inlet and discharge silencer, inlet filter, check valve, ex- tended base, V-bell or flexible cou- pling and drive guards. [` EVERY GROWING PLANT NEEDS ROOTS PERFORMANCE TABLE t T•; 'ur .: 4'fsiA •dfft ".. Gi1.1 i'rey R .q_ 1` B14P '6 ,� 2 41 :-66' � 1:0 " 04--7,..--.--....,... 1.3 1,9 -11.1,'I , Erzt? - '39 1.6 =86 ..2.3:..64 4.- ,. ti . :. ' 38 1.8 '2-.2.7. .. 36 2;1 -.63 3,1 ' ili, r..< • rylc.- :- - 32 •.;. 2.8 59 .:4.2 : {t� �k "Y 31 . 3.1 57 4.5 i 29 3-3 55 4.9 :,16P&I f: `J. _ ! 4 14 15 e > 4. ' 20 ---:53 4•�t.. i I�' -0.3 4: :�,1' 22 1160 $500 5276 10 49 76 _42 . 0,6 0.8 7 48 73 0A 02 12 4 - 0.3 43 1,1 70 1.6 1150 24 '0.3 10 0.4 15 06 "-11, 0-13 8 0.4 i 6 .42 r 0 ' 24 36C0 102 .0.8 97 1.3 93 1.8 89 23 ," 89. 2.8 63 3.3 81.. 3.8 14 -.69 :3t6,: 5275 156 1.2 1.50 1.9 146 2.7 143 .3.4 -140 .42 '137. 41.9 135..5.E 15 '1111 :5.8 1180 40 0.4 34 0.6 39 0.9 27 1.1 -:: 24 1.3 " 21 1.6 19 1.6 ' 10 18 1.3 92 28C0 113 1.0 109 1.6 104 2.1 101 2_7 - fill 3.2 95 3.8 93 42 80 6.0 84 63 82 7.1 77 8,7 15 78 4,5 36C0 149 1,3 14-4 20 140 2,7 137 3.4 134 4.1 131 4.0 129 5.5 122 7.7 123 8.4 118 9.1 113 11,2 15 114 5,8 11E0 55 0,5 46 08 43 1,1 39 1,4 35 1.7 31 2.1 28 2,4 10 27 1,7 33 286.0 156 1.2 149 2.0 144 27 140 3.5 136 42 11.12 •5.0 129 5.7 126 0.0 118 8_7 116 9_5 14 113 5.6 3550 265 1.6 193 23 193 33 189 4.5 185 5.4 181 6.4 170 7,4 170 10,3 167 112 165 12.2 15 159 7.6 118) 95 0.7 E15 1.2 78 1.7 72 2.3 66 25 61 3.3 57 3.8 10 55 2.7 36 28C0 262 2.0 253 3.3 245 4.5 239 5.8 234 7.0 229 9.3 224 9.5 12 213 7.9 366.0 344 2,3 334 4,5 327 6.1 321 7,7 315 9,3 31010.9 306 125 15 278 12,7 660 36 04 12 0.6 28 0.9 24 1,1 21 1,3 18 1,5 15 12 2 19 1.1 42 1760 92 0.6 67 1.5 82 1.8 78 2.2 75 2.7 72 3.1 69 3.6 62 5.0 60 6.5 59 52 14 56 3.5 3600 234 1.7 1E8 2.6 194 3.6 190 4,5 195 5.5 183 6,4 181 7.4 173 10.2 171 112 169 12_1 163 15.0 15 164 7,5 610 79 0.6 68 1.1 50 1.5 53 2.0 43 2.4 42 2,9 37 3.4 8 46 1.5 45 ' 1760 180 1.3 177 2.2 109 3.1 102 4.1 154 6.0 151 5.9 146 6.9 133 3.6 12 134 5.8 3660 410 3.4 4C0 5.3 292 7.2 68-5 9.1 379 11.0 374 12.9 359 142 356 20.5 15 339 15.0 860 105 0,9 92 1.4 82 2.0 73 2.G 005 3.2 59 3.8 53 4.4 8 63 2.5 47 1760 249 1.6 236 2,0 225 4.0 217 5,3 2C{g 6.51 203 7.7 19r1 8.9 12 181 7.5 3333 542 4.5 523 7.0 519 9.5 510 12,0 503 14.3. 496 17.0 493 19_ 15 452 19A 703 72 46 63 1.0 56 1,4 51 1,8 46 2,2 42 2.6 30 3.0 10 3G 2,2 53 1793 211 1.7 2D3 2,7 136 3.7 191 4,7 186 5.7 161 6.7 177 7.7 167 10.8 103 11.8 1E0 12.8 14 155 7.5 2350 355 3.3 346 5.0 340 6.6 334 8.2 329 9.9 325 11.5 321 13.2 310 18,1 307 19.7 201 21.3 295 26.2 15 235 132 703 123 0.3 110 1.6 100 2.2 92 2.9 65 16 78 4.3 72 4.9 10 70 3.5 65 1760 352 2.6 345 4,6 335 G.0 326 7.7 319 9,4 312 11.1 3119 12.8 290 179 14 276 123 290 5,96 5.2 515 9.0 575 10.7 667 13.5 EEO 16.2 553 19.0 647 21.7 531 300 15 510 21.9 71)3 187 1.2 170 2.2 156 3.2 147 4.2 138 5.1 133 6.1 6 135 4.1 59 17800 523 3.9 513 6.4 500 8.9 490 11.4 48 13.2 472 163 45118.5 12 445 15.6 26 0 881 7.8 065 11.0 .052 15A 4342 19.9 622 23. ! 824 27.9 816 31.9 15 770 32.1 71)) 140 1.0 126 1.0 116 2.6 147 3.3 1 C0 4.1 93 4.8 85 6.5 70 7.8 12 71 4.7 65 1760 4C0 3,4 387 53 377 7,2 368 9.1 360 11.0 353 12.8 347 14.7 330 20.4 32s 22.3 920 24.2 307 298 16 340 15. 2250 546 5.2 532 7.7 522 103 513 12.6 54'6 151 499 178 432 26.3 475 27.4 470 33.4 4110 32.9 462 40.5 15 445 21.E 7C0 224 1.5 233 2.7 187 3.9 172 5.1 160 6.3 149 7.5 13) 5.7 10 135 62 GO- 1750 643 4,9 621 7.9 639 10.9 591 14.0 579 17.0 557 20.0 557 "23.1 5.3) 32.2 522 35.2 515 38.2 15 435 23.5 23.50 676 7.3 855 114 838 15.4 824 19,5 •r112 23.55 001 27.6. 797 31.0 753 432 755 47.0 746 51,5 16 715 340 7C0 424 2.6 389 4.8 351 7,1 323 9_3 Zj.Q.L11.6 279 13.8 8 292 9.1 615 1761) 1205 8.1 1164 13.9 1133 19.5 1107 252 1004 33-1i. 1053 20.6 12 397 35.0 2350 1641 11.9 1631 193 1570 27.0 1544 34.6 1521 43.2 1,`l30 49.8 12 1433 47-5 575 195 1,3 179 2.3 163 3,3 158 49 150 5,4 142 6.4 134 7.4 115 10.4 t2 117 62 76 14C0 526 4.0 511 6.4 503 9.0 49.3 114 481 13.7 473 16.4 466 18.8 447 26.3 441 20.7 426 01.2 421 33.6 10 413 20.4 26.50 7E5 6.9 772 10.5 761 142 751 17_8 742 21.4 73-4 25.0 727 26.6 76.6 33.5 763 43.1 897 46.7 1*2 57.E 16 574 30.E 575 362 2.2 336 4.0 316 5.9 299 7.7 2114 9.6 271 11.4 258 13.3 226 16.8 12 228 112 711 14C0 976 6.5 944 11.0 925 15.5 939 20_0 893 24.5 890 29.0 867 33.5 535 47.1 15 793 34.4 2C60 1450 10.9 1424 17,5 1404 24.1 1307 31.7 1373 37.3 1359 43.9 1247 50.5 1315 70.3 16 125E 54,6 575 600 3.9 563 63 53493 510 123 -409 15.4 47015.4 10 446 15.0 716 1.1C0 1530 9,7 15.53 17.0 1524 243 1503 31.6 1479 3.9.0 1460 46.3 12 1393 44.6 2cso 2373 15.7 2333 26.0 2334 372 2233 47_9 2259 53.6 2240 69.4 12 2178 56.4 Notes: 1. Pressure ratings based on inlet air at standard pressure c-1 14 7 psia, standard temperature of 63°F, and specifi. gravity at 1.0. 2. Vacuum ratings based cn inlet air at standard temperature of 68'F, discharge pressure c1 30' firj and 3pecifi5 gravii/ 01 1.0. DESIGN & CONSTRUCTION FEATURES 1, Detachable stool mounting loot 2. Rigid one-piece cast iron casing 3. Anti-frioiion bearings •1. Thrust control 5. Splash -lubricated spur timing gears 5. Connections in standard pipe sizes 7. Straight, precision mochincd tiro-I01)0 impellers 8. Ground steel shafts Tice, coa.3 i4cat R O O T S eo Lseit Tr,1 S-12K84 {l'•`RZ. S-5124? Revi,cd December, 1997 A2 5:0c1:N101s s.Cjo_I [a thcrv9.0 ..th .,l rcd:0. C 1417, Erassd DRESSER INDUSTRIES, INC. ROOTS DIVISION htlp:b`rrr w.rootsblower.com/ 900 WEST MOUNT STREET, CONNERSVILLE, INDlANA 473-31 TELEPHONE: 785:827-9200 FAX: 765,"S25.7669 Printed in U.S.A. C,5:4Ic=rs Tl�eS7`1 N N Vf F 1- H W W W W W W N N N V1 0 0 N Cr Tr N N N N N 2�f,� lo00 4AI-� SuPPL`i(Ai 1E34 cf'ii a f, - 2 c.F4A tcoo LS ZLFM . 7. Lis4-#ems I CFA 000 FT 3 1owf: o likEivT' -a to -2- cFm {000 Fri M 0ir�& Nc W G"--! 000 .f �5 014 „l?ip&-mws fflont (.S o -oo piLs 7L1g770I\.) / =?) _. f co0 Frj 7p7pc. f)02 (GNG Tidy/41 Af/D j ire L 7i/ 1.$7(w) 3.5 O •t /6 3 ri /35/f 30 ?- Z 65Z c,-44 Z W, = IUZ2- cf_ Sar2PLEt, 2 itokiEri S frr CoN7(/we- iv 05 ilj<iS /A)9 geot 4e_5 Tore ` A/4 ` /9/ 7 erk ?6,Ls co4i.`a44iR r 3 State of North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross, Jr., Secretary Gregory J. Thorpe, Acting Director Mr. Randy Beckner, P.E. Mattern & Craig, Inc. 12 Broad Street Asheville, NC 28801 rA NCDENR NORTH CAROUNA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES January 15, 2002 Subject: Authorization to Construct Permit Tuckaseigee WASA Cashiers WWTP ATC Permit No. 063321ACF Permit No. NC0063321 Jackson County Dear Mr. Beckner: This letter is offered in follow-up to my conversation with you January 14, 2002. After consultation with my supervisors concerning this project, the following modifications must be made to the plans and specifications prior to issuance of an Authorization to Construct permit: 1. The new equalization basin must be equipped with aeration to prevent septic conditions (this is not apparent on the proposed plans). Please submit revised plans and specifications that indicate this. Also, provide revised calculations to ensure that adequate air will be supplied to meet the aeration needs of the equalization basin. Typically, 10-20 cfm/ 1000 ft3 is the minimum required aeration to prevent septic conditions. 2. The sludge holding tank calculations appear to under estimate the amount of sludge wasted on a daily basis, which in turn affects the tank volume required to maintain the 30 day holding time. Traditionally, the Division estimates sludge production using a value of 0.65 - 0.75 lbs sludge/ lb BOD5 removed [ref. Metcalf & Eddy, Table 8-7] and assuming a sludge concentration of 2% [ref. Table 12-8, % dry solids after secondary settling tank without primary settling]. Using this calculation, the estimated gallons of sludge holding tank capacity for the required 30 days is - 40-46,000 gallons. This calculation was also roughly compared with 10 States Standards using 3 ft3/ Pop. Equiv. And assuming a population equivalent of 100 gpd/person for 200,000 gpd permitted flow [ref. 85.31 of 10 SS]; a volume of - 45,000 gallons would be required using 10 SS calculation. The Division is willing to accept your estimated volume if actual data can be provided from the existing system. The actual data must reflect seasonal variations at the plant. 3. As we discussed yesterday, January 14, two conditions will be placed in the Authorization to Construct (ATC) permit. One condition will specify that the existing filters be thoroughly evaluated to determine why they are not operating in an optimal manner. A report stating what has been evaluated and what will be done to improve operation of the filters will be required to be submitted to the Asheville Regional Office within 90 days of the issuance of the ATC permit. The other condition states that if Tuckaseigee WASA does not proceed forward with the expansion, the Division will still require the owner to provide additional clarification 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 510 (fax) 919 733-0719 An Equal opportunity Affirmative Action Employer Susan.A.Wilsonencmad.net Mr. Randy Beckner Page 2 to accommodate peak loading [the current clarifiers are under -designed and overloaded during peak flow conditions]. 4. As we also discussed yesterday, please clarify the piping plan shown on p. 3 of the plans. Your client should also be aware, and likely they are already aware, that the Division's Environmental Sciences Branch conducted instream biological sampling, the results of which indicated an impairment downstream of the discharge. Although this monitoring cannot specifically identify the pollutant which may be causing the impairment, instream toxicity is suspected. An evaluation of chlorine use and the functionality of the dechlorination system should be performed at the plant. Please submit the above information within 30 days of receipt of this letter or the project may be returned as incomplete. As always, all modifications must be signed and sealed by a North Carolina Professional Engineer. Also, please copy Kevin Barnett [Asheville Regional Office WQ, 59 Woodfin Place, Asheville, NC 28801] on the revised plans and specifications. You may contact me at (919) 733 - 5083, extension 510, should you have further questions. Sine ly, z san A. Wilson, P.E. NPDES Unit cc: Asheville Regional Office/Water Quality Section/ Kevin Barnett NPDES Unit Mr. Jerry King Tuckaseigee WASA P.O. Box 1051 Sylva, NC 28779 SINCE Mattern & Craig ]978 CONSULTING ENGINEERS•SURVEYORS J. Wayne Craig Stewart W. Hubbell Gene R. Cress Michael S. Agee Steven A. Campbell Wm. James Jones Randy W. Beckner Wm, Thomas Austin Bradley C. Craig David P. Wilson Edwin K. Mattern, Jr. (1949-1982) Sam H. McGhee, III (Retired) November 1, 2001 Susan A. Wilson NCDENR 1617 Mail Service Center Raleigh, NC 27699-1617 Re: Tuckaseigee/Cashiers WWT Comm. No. 1457P Dear Susan, We received your fax of October 8, and offer the following responses. lid 1. Complete set of sealed design notes are included. Copies of the two letters with my seal is attached. 2. Revised headwork calculations are included. The existing system uses a manually cleaned bar screen, which is adequate to handle future flows. 3. The equalization basin calculations were included. They indicate a total of 25,000 gallons volume in the existing plant, and a25,000 gallons in the proposed tank. 4. The aeration basin calculations are revised. The existing plant, with the filters, can meet these requirements. The existing clarifier will be used, but will not provide significant clarification. The new clarifier will provide clarification. The existing digester will be used as storage. The sludge is hauled to another WWTP, so these digesters are only required for storage. Specifications section 11251 has been revised as requested. Revised page is attached. A summary sheet showing total air required is attached. This details air flows as requested. OO 429 Clay Street, Kingsport, Tennessee 37660 (423) 245-4970 Fax (423) 245-5932 c Susan Wilson November 1, 2001 Page 2 5. Total digester capacity is 30,110 gallons, as outlined in the attached design notes. The existing digester, based on the submittal information, is 2,024 cubic feet, or 15,110 gallons. Proposed digester is 15,000 gallons, as indicated in the design notes under they manufactures literature. The Yobs was changed to reflect typical average numbers of 0.5. This increases sludge production to 923 gallons per day, or 27,690 gallons per month (30 days). Based on the digester designs, this provides a storage capacity of 32.6 days. This is greater than the required storage of 30 days. 6. The existing clarifiers have the characteristics you describe. These will be left in service because of the complications to remove them from a package plant. The existing clarifiers will not impact plant operation. The new clarifier has an area of 314 square feet, which gives a peak overflow rate of 795 gal/d/sq. ft. 7. We believe the filters are designed properly, and any operational problems with the existing filters can be corrected. Any problems with the existing filters should be addressed as maintenance issues. 8. The blower enclosures will be insulated, similar to the existing blowers. This should provide noise reduction performance similar to the existing units. These were called out on the plans, but an additional specification item was added. This revised sheet is included. We do not believe there are any other feasible alternatives to reducing noise from the blowers. 9. Standby power was provided during the last plant upgrade, and was designed to accommodate the additional package treatment plant. If you have any questions or comments, it iir4,00,14.18•1,,,,_ 1. cc: Jerry King �g••.,,t amen Enclosures please feel free to call. Sincerely, Mattern & Craig �ii.. GJ . ei ,k Randy W. Beckner, P.E. Principal Design Notes Cashiers WWTP Mattern & Craig Revised October 31, 2001 ▪ * *ESS/p • Q r_ ,� 327 A-s: w v. " 01311G 1 Sequence of Construction Tuckaseigeee WASA Cashiers WWTP The new equipment was coordinated with existing equipment during design phase to minimize issues during construction. The entire existing plant may remain operational, without disconnecting equipment or relying on new equipment at intermediate steps. Below is listed a possible sequence of construction. The contractor may perform the work in a different manner or schedule, as he requires. The contractor is required to maintain proper operation of the plant and meet all NPDES limits and during plant upgrade. 1. Install new treatment equipment: a. package plant b. clarifiers c. filters 2. Construct new chlorine contact tank and post aeration chamber 3. Install blowers 4. Construct new control building including chlorine and sulfur dioxide equipment 5. Install new connecting lines (i.e., filter backwash, drain lines, etc.) 6. Connect new equipment from back of plant: a. Post aearation b. Chlorination/dechlorination c. Filters d. Clarifiers e. New package plant 7. Fill equipment with effluent to test 8. Complete equipment startup 9. Drain effluent and fill one train with sewage 10. Ensure plant is meeting operational limits SDICE 1978 NZattern & Craig PROJECT C ej. 4,114 „ ram' -' r p TYPE CONTENTS (-lP,.cQ OJock..S CONSULTING ENGFNEERS•suRVEYORS DATE COMM NO. PREL. FINAL SHEET NO. CAL. BY CKD.BY sc..r .3 e.e, B / fCo Pe 451 im L.-AO ‘19N,I I ( V fr-1.) e t 7 d-- i+e/al. c,tv"-c.Q, V • C ▪ Z. Lo,, DLL l S r>Gn 1Kys /4 11 E x 1, ti 1. 1 zs Pr K..,a y 4 B. et qY csO ctrC/ j •.49/A1 8.1) rz. - n2- 4",7 '- Z• 3L,L -- \;jg, {JL .'. Ptgg0 tJJW04.5 4f. z L CJ. Z $ �rJs O. z-s- rr1' EXHIBIT B / Mattern & Craig PROJECT GA s i4 4, kASA., ,r-P TYPE CONTENTS t--. cI . 1-c,A CONSULTING ENGINEERs•SURVEYOnS DATE COMM NO. PREL. FINAL ISHEET NO. CAL. BY /4.fl.-, CKD.BY sL. 134.11 V� L.5 bZs, LLa > PId p 3OPT) c u) ,Lt ) , re rya �. ruriii-1 -7. ONO w S- soue-' r z, CryD 510 to /o b..� '> y" d evv • i.ia--Q. 4t5 Ir. EXHIBIT PROJECT L ra s L, «1 ./1(1„. Mattern &Craig (CONSULTING ENGINEEI%S•SURVEYORS TYPE CONTENTS ig coz..ra,-• ow (3 s=t s...r DATE t l -•1— o t COMM NO. PREL. FINAL SHEET NO. CAL. BY # P,-1 CKD.BY �=x.sn►.t.. s, f7 fit v 0 O �1..�1s•r S 1> r p c9 j <'-YD iia. gt .J co "..1 t' z3 '- 07) 'l 0. ,03/ 1 y 2. tS ,c'r 3 1r4- v - es €_. A e. 1 o-H 1- t rt & '. v 6v40) 0ta 4. )OCo, tjunJ IP v/ cove lo,--r( 0w3 v UCµ{�• AS.0wet ry L,0 V` (� 1> G ► c, wr O s 7 l • 5- 1 u fob 40�1 Lam, EXHIBIT 1978 / Mattern & Craig PROJECT Gr, titer -a.. TYPE CONTENTS CONSULTING ENGfrJ $•SURVEYORS DATE i b. 31- a, COMM NO. PREL. FINAL .- SHEET NO. CAL. BY .4a CKD.BY B o o� LnIac��c, d,Z/Lito0. e z.-n ,4.1/I Z rr4t.) 56.3ys- - 17 115/DOy No1Z r-t4L 333 iss /t3 r (7X S T . P %-,• .J- D % < <• N (3-0 13 i Pr post C. (-4- G (.k T D j•r D�.�c-,o `4 Lo�I )Js /brry Z. s 5a C _ / 1% 3 ay Cz- S) 3 33 !ss v 3z.s-' (bs Z-1z g3 zs- S'S' z CrC►.� l9.o?SL ly /[1,L34.)(Ca-t94 / �r (\ tt f x ►s r, ,' 1 = Z C7 3 4- 3 . D = 3' .5',„; G. r r--7 EXHIBIT sa./(Mattern& Craig PROJECT C. 14Lc, S TYPE CONTENTS t L w a-ut 5 CONSULTING INGWEERS•suRVEYORs DATE COMM NO. PREL. FINAL SHEET NO. CAL. BY CKD.BY 'rim EXHIBIT • PROJECT G b TYPE CONTENTS 4001tP 8 Mattern & Craig CONSULTING ENGINEERS • SURVEYORS DATE 3 /z ,1 al COMM NO l 1/s ? PREL FINAL L-' SHEET NO _j_ CAL. BY fb ti CKD. BY P L.p r 6 L.1r t v4-t A r2. tr Z•v.. v, s rat r.,.o 3 4 tfi o 1x1 0,3 s C L I S'h--1D !_-Yic4u0 fl>:.r: na.-► t3ws, V= Iao,voo G'0.1 eT; Y7 vet E.7' 211 hlD vas G L r iZt F t V-tL �"lL l b ILtXLyr X 11.f1-4, 4, wp D LT 7Nk WO a�S Wc'12 = 33.751 2.gto3 ra�V /rT%D�Y L o Prla 1 w s;, a 3 4 7 L., ra !r / d ra f p rg y Dt t•.a-3 r 1? 7,." c L4'xli' b -p e-r 77-u- g f3 0 1-1/r/a, 3 ! ,' -//Fr o/o 3 PROJECT L-41 s ti 1 r: ►a TYPE CONTENTS L�r�t,!=,t.rt ./PlMattern & Craig CONSULTING ENGINEERS • SURVEYORS DATE 34 t /u/ COMM NO /v s 7 PREL FINAL — SHEET NO / CAL. BY (J V' CKD. BY Pc-e.› des L e,' - 3 `i 3 $ - oo — 3 �-t, L y s�+ 4 6L+tat, 40v1-511� �T �f= 2.1) - 04. Lv.S) t4 t N st b y Z L — L» -*- (r `'t' s t> :• T?' L D n -+- 01) = i7' L t 9 1,r / C., v3' J q Ft : e1 1 t-k Co r lLi. e3 1\ Z•!o1 C.. AS130 77' /,./ upv-�,on J V= TMrLti, rrtz01z1Z,›0.7.'iv (.p./ 2,9,37SL� b e-A 71 w c. 2 73) s toed k z 1 14 7 1.1 , t0o,000 644, 2,x WC1t� 1 1 t , to t c, o, 00C, egg Cy viil,c-/- nvc., 11L.t— V 00 )(by' Z. d &J/a /,,-y plc, t PROJECT CA S H-I c=t2 .s cv Lc) 7-0- TYPE CONTENTS C t 6 a, t r 1 (7y2.4. ./P. q Mattern & Craig 1978 CONSULTING ENGINEERS -SURVEYORS DATE 3 /z v /o f COMM NO 1 1-1 S ? PREL FINAL ✓� SHEET NO. lit, CAL. BY 1rD r'1 CKD. BY ) 1.9L / o€.-9 V II- LIL9L) 31g L el/c/Frz 09-vco- 3 1 2 >t Z. b .- 7 Ts-- c..., /b / ICT t- e PROJECT r_y H -rP TYPE CONTENTS 4/7(1 Mattern & Craig 1978 CONSULTING ENGINEERS. SURVEYORS DATE 3 7-0/ COMM NO PREL FINAL SHEET NO. CAL. BY Io'-r CKD. BY CX 571 w t— 'A. 7-1 v-) '. L1�tSr� C Lc.ritr L9 ' x 1 Cp " V= zo? -.Fr. 1, 43 1.1o0tL s, bI Co E 7-1 7 - wm- z- = 3 3 Pact-1 ► 161, 3 1)130-il rr/4 L.- 2- Y -177arti Z 9 c. 3 Z Pli=�-/ate y 3 v 4 Z .311 7 L 7 4 /,-'4, 7 I- g,. L K' x I/' D c e _gyp Zc,2. Fri _ ! o Y Lam. 41 6 PROJECT t4 S N r c s w w TP 4,/PPq Mattern & Craig 1978 TYPE CONTENTS CONSULTING ENGINEERS -SURVEYORS DATE 3--7- at COMM NO PREL. FINAL i/ SHEET NO Z CAL. BY /t v-y CKD. BY 17 + Cp 1.17S'r"7Z.. z...HGGraoofIeq 0, t.) oo LQ„, .3,4) 0.5. Et 10 1W41,44. 1 5• 1 /DAY FIZO fl C,lec-f • 1 5'N ass C. = IZfa tbs/n \9 L- '6.5/0. a, z )511/13./.41 to — 6,z)Cxea, �k,34' /06, Fr 7. q Y 1 t' Pt. .534 Lie-3) Lia-4) 5`v v C. y L 30 14-'s c'e-4., • .a`Lad aC 3v vaa t•3 x j = 7.-11 iv/a De LS P. mit- v► IQc4� TT./ tt crG Lr �. ��l / 3 czei I FYWIRIT PROJECT ('_� S14 Ms t,�w rt, TYPE CONTENTS t= ) 4/7(1 Mattern & Craig 1978 CONSULTING ENGINEERS • SURVEYORS DATE 3- 7-vI COMM NO PREL. FINAL SHEET NO V_ CAL. BY ► PY-1 CKD. BY 140 afry= As -a, Po 1 73..,S Lp-v 1 /5) Z = I `l, La rr z A72.49t N =- i t U I L= 3 y, L r LoAc>>wc. i 73. S Lpri bG'3cc.t-.1 1 5. L r-T 1p9, q 0-f 9,L Li LPp,i �cr-L 1'2 Mx 1, LPG /9-vc„, %-7-L • w a m Y 0 CAL. BY NA L-- a. CONTENTS t.o vt) 344.SO Z,o.w 3440.00 343i3.W3 I tuV 2423,C07 I( _LI 3424,1-T Ectualvp o - 3434.40 �. 1r 3433.L1O Mia 343o, ros' 34-z 7. 40 ' —! lkt s We.;fr 34 3°1 SS)) �>Jv. 343-1, sa' ENV 3432.:1St �-- 34753, i-7 Aerterlo>n 4a6,-, 3930, 3 L. Qtrcr�lo,,,, weir 3430.63 3930.7'7 1342.5.. 707 34ZCo.3 3- -r,o.w_ (NV- 342-1.6" 3ti z6,00' T,aW 34 406 0 \A) 4 343v.yS/ 'L INV. 343S.-IS ,„ �-- 3424.c$ ' C\q�r1f er T.OW 31-1Z91.90 jr-..; 342..cg,00w.5.: 34,1:1331 17.." V-Nc7Tc4 wE1R 3La 7.40 • 1)1 6" Efftuer • Line.. +o r ltefs 2" 3 4oa 1 42 . 6" .4 To Crttk. -‘t NV, 34214 POI ti 34 mod d p1/4k A f..nO:\ tor, Cnnt Na C.1^c rhbe(` t i')V_ 1423,10 f(- L� -To Past &Act tor\ / I -11 I t11 J 4 PROJECT CO`S\'N‘c-`rs WWV E-)c o y TYPE CONTENTS Po`^k Logo if 7: Matt3ern & Craig CONSULTING .SURVEYORS DATE 3W2' Kok COMM NO. (LI57 N PREL. FINAL SHEET NO. CAL. BY " CKD.BY s 3 cri 5 • 4 C 0 0 4 1 0 f oe 0 Ir'VIJIrfIT PROJECT CA64I6-e-S ow -FP TYPE CONTENTS P° S7" AeA 710�1 Mattern& Craig CONSULTING ENGINEERS. SURVEYORS DATE L1/614' t COMM NO 1 `-1S 7 P PREL. FINAL SHEET NO �' 1 CAL. BY CKD. BY 0% %" j us/rvC7 £'tV!e.o Qut P MAP CA-P 1-1(Q Sv6✓}'1t EAICE G?a (3i)�,,,i �a = &-z?i: A-1E F& [ J RATE T 3/. GSAs-1-6-1Aie. FL w /214-7E o. z fG D = o, 008 8 ni,4 C s = S ,4 r - on! od c l reA 'nod of Oz.= ,! , cSr- l /.� E - OZ E 1 ' IGr = z.370 s sc %ar r-r. C,_/,/p-avt0 -0in&ll ea Piga r o l►1 Ol r1"CAL F i , i s.s,,, jd/7 ZSa m AVe bA r o i 7 '1 i° 62Q. eoL2 7 -rlftl aG 5-6'24ie) F1(i 3-10 6/ve-5 T J J ' 9'L F-400? A-PPe D 1K T es= I I.55 ✓g %Q vG 0 00 3.5 wicoa,886)( dD11/P ,315,�- , or1(v x 3s. 3 x GPo s/rl1,! z'f. S GFi1 2C/•S # �1 ' = S vsE r >r - Ale c ,nst e te zo' X y',)c 7' swt - 87s cF (1 .SS - o 11.55 -4 87s(7.qb"Vcr) 139 OPr''i ./ I CVUIGIT 111 Snap -Cap 5 - FF LJSE RSA THE NEW SNAP -CAP "PLUS 5" represents a substantial D1 design. The major Improvement is In advancement in Mt ar of diMuser r the snap -on check diaphragm cap which is now manufactured Imam a ` new. specially compounded. space-age EPDM•b.ased thermoplastic ruboer that provides extended lite and improved performance. The Snao•CJo 'P'us 5" Diffuser consists or two simple parts. ins suppor, aase and a flexible snap -on checrt diaphragm. During aeration. the diaphragm life from the base, allowing the au to exit through the onlices in the daphragm. When air stops. the diaphragm is instantly seated against the base by the pressure head of liquid. preventing backflow and Clogging. Tme novel edge design of the &Muse( locks os the removable diaphragm to avoid blowotf during unusual pressure surges. Diffuser arc available with 3/4' arcr978' NPT threads in • Celeon plastic base and stainless steel base rmodalss. Modal 750 diffusers will handle air Mors to 10 CFM Modal 375 i tfusers will handle flow] la 5 CFM. Closed O{e ++We C-rate V Coen Onl,ce O D.iiuse( Cao D.Muter Base ....,. SPECIFI ATIOH' DATA • S der T H Cap Model No. Model h PT A sr. ism. • 37S tl.' 'S�' 14' Yle l0 10 7So t.' 11(.' N.' K.' 10 10 ✓ 2.0 c DIFFUSER PRESSURE LOSS GRAPH )n ("h" HPT) r n0 (v.-won e 12 to 20 Air Fla,' io CFM MODEL SELECTION ]T� ' /.• NPT{ 7.10 t'l:- t+PT) _tl f1Iol prygan fi.nsisr/P,rcinl eo e0 2.0 DI FFJ SER OXYGEN TRANSFER GRAPH' 7712 t'ti" NPT) 777 I+r. NPT) ✓ � ' t\ 10 Perforrnenc• 0 9'-0' Submergenf• Air Flow in CFM 2a 2e 0 .--r-a,and a+.1 r7 e.tc a... •--_ S _ stairv.se Aid Ore 12 IJ • 8OO-543-0,89 9l92 20 18 16 14 12 EnviroQuip International, Inc. Snap Cap "Plus 5" Diffuser Performance 6' Submergence -- • • ■ 13' Submergence 20' Submergence ' 0 2 4 3 6 -.sc M mlrrn er.. 7 9 10 PROJECT TYPE CONTENTS CAL. BY SINCE 1979 Mattern & Craig CONSULTING ENGINEERS • SURVEYORS DATE zl io / r COMM NO / V 17P PREL. FINAL SHEET NO q. CKD. BY • 5 Zo'-o" O D 4 3'1 Z. ? , o 8" g-L, 3.1aq. 75 vIS E«v 3q26,08 6 C 71 o, .( k _A. CI.ICCt ovYi4AIG �S- AleCiLt"C7 IC. 4 SOIL- WT T : Z 70 A)( rol = a . e t ./ Zo .�_hit 3,1v`r.c q)(8)(ep 2.`1, 15) = V o L 6,rL Z70 ( C P 1 =VI-JIRIT PROJECT TYPE CONTENTS DATE PREL. CAL. BY CONSULTING ENGINEERS • SURVEYORS COMM NO FINAL SHEET NO CKD. BY rulIII-1 �,-irT Cog Prvo.cc, J Coadieo citu 90° V -th,--tC,L 3c/Z7•DO Z-t"(30' it _8" /0' 3�lz7. q3 5qL7.fo3 loo° V -,Kr d, 3�130 3 i 3‘130.7Z. 3c 3c) .q D 3`13`8 • `/s- 3c/38,S3 3y38.sYD o. Z 043 o.S o•(03 o•Z 0 o•s 0 o, p o .ql o. z s o. 52 o.Z .oZ o.S ,zci o. a 08 l< o.11 0.2 o.o(a o• 5 0.36 AvG.a `o-, 36+/2ect W�/ ) 39ayo 0.ID 0• Y ( oJ�o4t . i CaNIA c. o.Z 5 0 , a Z l46-IL 3 c/ Z 74_5 SgZ7•to3 3gZ7•�3 3L/Z7.&5 3'13v.7z 3(13o.90 Sit 50. 7V 3(13/.lLI 3,/38. s3 3 /30 ..4, 5g3s.s9 3q 33.9Z cl 39. of 34439.0Z, Re cvfl • iar�ik_.•�-:•..�.r�t mow_�.,mof�. wr.6�:rccssi.�__ra�R - '+�G . r.... i'il!. m j\ l ' ' ryq, -•ir~Sri��tyv*i . 'l•_;v �.-a:n,e -u , •., ! r tiE j' _' 'ice'• t 4l ?;,4t' CASHIERS WWTP UPGRADE TUCKASEIGEE WATER& SEWER AUTHORITY 1. WWTP AND CLARIFIER DESIGN 2. TERTIARY FILTER DESIGN 3. CHLORINATIONIDECELORINATION DESIGN 4. POST AERATION DESIGN NOVEMBER. 1996 COMM. NO.1457P • •r JJ. -.I: nr• . r.:; Jai • V. • • `: ••.. ♦ •:2 ••• • f•..i• JIa♦ •air r:-�t .i .. • ^}. •• •+' r'•� f... �. C. `f. a4 �c ��.`}.V1.�--. .r J _i �•y: • vI^+f iaa . 77 ��y'�r,+} ''{�,.I9 li. :a'i •. • •'•G r e C: �" '�:`j;� _ ..� •♦fit.•t1; •�•-- +•j�•,y�;:• ~:•: "•. \..f F.;1 Z"1'�J,t �. � 7r� ♦ y"i►. >�� .4i: is..C. �: 'a1i�J- � J.,.��_ �Y1.-f _ r.�-•!,': • f •.. ice_ - rT3 DESIGN DATA FACTORY BUILT TREATMENT PLANT DESIGN PARAMETER: A. Total daily flow =100,000 GPD. B. Q = flow in gallons per minute = GPD = 69.4 GPM. 1440 C. Maximum flow rate = 2.5 x Q = 173.5 GPM. D. Runoff period is the number of hours each day in which that day's flow is received = 24 hours. E. Total daily flow in gallon = 4167 gallons per hour Daily runoff period, in hours: 24. F. Total 5 day BOD per day = 208.5 pounds. - G. Air requirements Air requirements are based on 25 cubic feet per minute per 1000 cubic feet of volume. Aeration Compartment 335 CFM Aerobic Digester 50 CFM Air Lift Eductor(s) 30 CFM Total 415 CFM at 5 PSI H. Plant Profile [ ] Buried [ ] Above Ground [X] Ground Level 10 ft. above base slab GENERAL DESCRIPTION:: The plant is composed of the following compartments and equipment 1. Aeration and aerobic digestion zones with non -clog air diffusers. 2. Secondary mechanical clarifier with sludge and scum removal unit. _ • ; i • • • a. Duplex rotary blowers. .. - ... ....1! ' a " !" '.1 •.!:. .� - r. i'C?'.:tl; ; f T• - •• .� :4---,-;Ixir--,--I---/,-.* 'r•2!. f..+M v rr.;7.�.:�i�.!%�•'4. Central electric control panel. - - .�=,:. -• :.,:5.. ,r . , t .:,- �` :; . :�• �� ...s..`...,.aS J• ' �i•-a:.{�_s. L f, .�i .:.ai.i. ►'iA�,� .:.i :_• ;44.7.. ;+�1 ''i'1•• �' "S•.`E•'�`at yi' -+r 2. .a.-.. .,1• �': • � vS - `r 7 y.. r «`.-.F;.4 V. •7i�• +r: f` ltt ..�� is •:... a.+�M +.,fib ,,�� 17 �Si •+ ... • • • •. • • .• y�y '•i ♦� ~-• f •S •. 1v' V. _' f• �i•!t h7!�: �aY • •'i!a .1.'t � u.�.•�•;M• ••. ! ; •�•• J ;. J t�ttf: ,4TJ�� �• ♦ '_ 'r- - -r,...•Fl.-9;i,�x 4.,f . �. , �7 ate- t• j �jb y: v.• �.: ��. . l: >. {�.�.; .a {ir �='i•is ..�._ f r .f _ rr .� _ r e:j �• • .4',, ,1; •••.' sZ J .I. .lire i •" y :.Y=-J `"'' ,2 f•s :l...•:-.iA.l t '•� _'..• i'.M �''V. .. �t.•_4 �ti S•�� �T. ;'� �l� �•t,�-„ ! !; '�,.• .ram l�•x �'* tY :1 �• �;'ri•. t: �.� .:•��•J�: .: .r• , C• . � �'� .ti r,�t t':.i.3(. k,7f .�s,.,�j�' . _ • V . -} x cri• • i._.t:: -: �� -f � i �' � 7,��• ,�._.a���'� .' t t•ti ;StiJtC'^ 1'�:-•�,•��'y b..-' •t :-�,r '!.7'•:fs'`'-'•rMi:'J� �i j�tt.�.!J�i•� jr.��r•< - �•��•'i '�S r«tv ��a1�Gi� �-?r.>>%j.-`- _ ..J•--...!.?=.`" ib...f• .• --4 w•..'•>'.' .- Cl�. �+ . : r�-.i'y - ,..r1;, 's�3 ?,:._Na•. s • 5. Inlet comminutor with by-pass bar screen. 7. Access stair 8. Access walkway COMPARTMENT STIES: Aeration Compartment, 13,367 cubic feet, or 100,000 gallons capacity which equals 24 hours detention time at average daily flow. Secondary Clarifier, 2812.1 cubic feet, or 21,034.1 gallons capacity which equals 5.04 hours:detention time at average flow. Effective weir length 59.16 feet. Weir overflow rate 1690.S gallons per linear foot of weir length per day. Surface area 314.16 square feet. Surface settling rate 318 gallon per square foot per day. Digester Compartment, 2005 cubic feet, or 15,000 gallons capacity based on 2 cubic feet per 100 gallons of daily flow. AIR IIIFFOSION SYSTEM: The air for operation of the plant shall travel through air distribution manifold of steel pipe with diffuser drop pipe assemblies connected to the manifold. The drop pipe assemblies are supplied with an air regulating valve and union for ease of removal. 4 A sufficient quantity of diffusers are furnished to assure that an adequate supply of -- oxygen and a proper roll pattern will be maintained in the aeration and aerobic digester - • compartments. ELECTRIC CONTROLS: All control circuits to operate on 120,volt power. All components will be controlled as required. No conduit or wiring.to be supplied by Davco ADDRIONAL EQUIPMENT RURMISHEL Influent Equipment • [ ] Inlet bar screen • • [X] Influent box with comminutor and bye bar screen ti• •'. • • .tea yy : :. , Ctj • ` !'~ fix . �"' 11-4•;3�, �� .3tj- C:.i J� `•r.'r. J•;:a '.�••J t) y2� ; . ?!~:: •T'r ,�7.•�4i. 1. • „t 'A �r,. y t.-c•;1,,r;r:'.;M r-N�,.. �.r _� i . s-,.r Wit. -: . .,--1.�rr..+{• t.:--r•?-•_J•• •G..' i. .•« -..X.• 'w'.:+..-•-•,,• �•r"°,.`.'s...`- ^F.-••4 a • Blower and Motor Specification: Blower Specifications Manufactured by: ROOTS Model 56URAI Blower Speed 2179 [ J Simplex [X] Duplex [ J Triplex Blowers Assemblies Mounted [ ] Inside blower house [ ] Outside on slab [X] On plant Motor Specifications 15 hp, 3 ph, 60hz, 230/460 volt, 1800 rpm, [ 10DP [X] TEFC • . . • • .: i. i•./ .: .it •i- ►. ♦ ,• '.T_ r. �+ " + 'rj .ilt '`.4•t .M���.� t}yi .ti.�: '"...•,., . • . •r. `.1.. fir ' "-'�" - - i., 5 *..cuZ" ...t . ti... ..__•_ ..s_ . _-i.-.11?�••• .�.. . •.,.}. It.l :� •.,Ct.:.. i✓ i; `. yt� .1 i�•r1 y , 1 l=. =.:ate- f p • • : ' ti 2 _ :.i. 1. :•' . yS �- -:i„►:'" ,r�/t ,.r_' j'.� �:.. �r:!.'.i'! �...= i .fir_: b• �'-^• y {'yC'' �y� •. t - - ' s.i -. a..' .r�win i. • -') Y yr i � .r c...�• -:� S'c..T ? - •p' 1ir • ,.• ��• •iIY.��il�� ft ./t.Zii�.�:�. +. �..- r 4= ' .}�i .7 n ' �.•s... Z + .i I_ : ;'�'� :� r'ti` , it a `�ix%{'s3 ••.13 ar, f- !3 '�! t 3�;j•'_ ° ,>, n Z �'• ! '3.}.;:1•i��.�-;l,.: .,;.; C �� vie ♦ ✓ k '! 7�..,.•:'i?,:.. c. ,�.� �,� .'• �'a �.: J i f.- ' i 'LR/��.-12-t .>�r,• as�r� ^( ;•: .i iy"t�yW� T..tt�i • : •i. iy a: •`.•.j j, / 'f.Lh♦ M,.' ,T.i•e.rT-. 1.- t �t �.'':�_:�-a;►mac.-7::.�i•.�ii1:►'•"-':t�P•••.= � ♦.t ,-•�!��� L^r. 'tL•i• • 1:`�e'�x.• r Y tL�:;, v. a!S}'}' �L("•-i:+' j:s r.'� �= ?. r v,.. sj�ii .`f:• .'a+ r. '*� �a*y�..►1 •';�. j?..';5'Z.' f i • �L� �;1..-�'�S N.1 "4 -ate .a ••:�i.,,,.. ... J.�.� ♦ j f• r'�'�' �t•Tr .7'�7�f11 .• w r K ! .•f- ��•i-fS 41t l_ _� ►;a_ t -, •r:f .•r.r�... i'.. • « • • Job Name: Job Number: Model Number. Contractor. Engineer: Representative: Type Of Equipment DAVCO ENGINEERING DESIGN DATA Cashiers, NC R-13378 ST0100FS Interstate Utility Sales TES 2-5 Gravity Filter Checlfed By: Date: We propose to furnish equipment as herein described for the above named job. This engineering data is submitted as generally complying with the intent of the plans and specifications for this project However, in the interest of standardization of components and fabrication methods, there are necessarily some exceptions taken. The customer should carefully examine the data submitted herein, reviewing especially for correct furnished and locations of connections with piping and wiring under other sections of the contract fiun Davco proposes to ishe only the equipment described in this brochure and provide such only under terms of the sales agreement Davco assumes no responsibility for the equipment not expressly mentioned. Approval of this submittal data constitutes acceptance, becomes binding upon both parties to the agreement, and constitutes a "NOTICE TO PROCEED WITH MANUFACTURE". APPROVED, SUBJECT TO CORRECTIONS AS NOTED:. . •- ' DATE: ENGINEERS: BY: Note: Davco will accept no backcharges incurred by any party, for any reason, which have not been specifically authorized in writing by an.of cer of the company with a cost approved prior to the work being done. NOTICE: This equipment is designed to operate on 3 phase, 60 hertz, 480 volt, 4 wire electric service. Please indicate if this is correct , Approved by: •Date: :art : r rf�•• • • • • DEAN DATA TES GRAVITY FILTER DESIGN PABAMETEBS: Total Daily Flow 100,000 gpd Q = g_d = 69.4 gpm 1440 Maximum flow rate is 1.5 Q = 173.5 gpm. Average Dosing Rate (based on average daily flow) = 2 GPMIFT2. Average Backwash Raze =15 GPMIFT2 or GPM. STANDARD EQUIPMENT: - Backwash Tank 2950 gallons useable capacity. Backwash Holding Tank 2950 gallons useable capacity. [X] Access Ladder Backwasli Pumps: Manufacture BARNES. Model 3SE2094L 295 GPM © 20' TDH, 2 HP, 1800 RPM, 3 phase, 60Hz, 230 voltage, 6.? impeller: Backwash Bolding P Manufacture BARNES Model 3SE594L 50 GPM.© 22 TDH,.5 HP, 1800 RPM, 3 phase, 60Hz, 230 voltage Water Level Seusars Mercury float switches 7 regd. Filter Cells: Two 5 ft. dia. standard Davco TES filter calls. • • • a r. .!r ....ay'I: a. �.t•%i� / ,• Y' ..,• z+h!•:yam.. t:'.` �)••. _/. .•t... •a'_... 3.,• war,.-..• :.•• .. • • s.tiv i^ _. j,A�• yr .vim' fi. 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TABLE 10.5 Typical values for the design parameters for the activated -sludge processes Process modification' Conventional plug flow Complete -mix Slop•leed Modified aorallon Contact slabilizallon ExIondoil aorallon 111011.ralo aorallon Kraus process oxy(joti Oxidallou Soquoncino tenth reactor Deep shell reactor Single -stage niellIcallon Separate stage nitillicellon 'Cooled unit. 3-15 1-15 3-16 0.2-0.5 6-16 F IM. 11) BON applied/ IALVSS • d 0.2-0.6 0.2-1.0 0.2-0.6 1.6-6.0 0.2-0.8 V01111110111c loadin(J, 11) 1300s/ 103113 • 20-40 50-120 40-60 76-150 60-75 2(1-30 0.05-0.15 6-10 0.4-1.5 5-15 0.3 -0.0 3-10 0.25-1.0 10-30 ' o.os-o.on N/A 0.05-0.30 NI . 0.5-5.0 0-20 • 0.10-0.25 (0.02-0.15)° 16-100 '0. 005-0 20 . 3-0 • • (0.0.1-0.16)° 10-25 100-1,000 40-100 100-200 6-30 6-16 NI 6-20 • mr. 5, mg/L. 1,000-3,000 1,000-0,500 1,500-3,600 200 -1,000 (1.1)00 -3,000)a (4,000-0,000) b 1,500 -5.000 3,000-6,000 2,000-3,000 3.000-0,000 1,600 -5,000 1,60(1-5,000d NI 1,500-3,600 1,600-3,600 V /Q, 4-0 3-5 3-5 1.5-3 (0.5- 1.0)a (3 -6)b 10-30 2-4 4-11 I -3 0-30 12-50 0.6-5 0-16 3-0 • 0.25-0.75 0.25-1.0 0.25-0.75 0.05-0.25 0.5-1.50 0,5-1.50 1.0-.5.0 0.5-1.0 0.25-0.5 0.75-1.50 N/A NI 0.50-1.50 0.50-2.0(1 r• . ^ • .�` x of :e17 '�f. 4: s+t o 3 • S.1 PROJECT TYPE CONTENTS � i lviartern rag CONSULTING e1GWES • suit YCQ. 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'Mt1 8 001 , , 1.00 11t.28 91.64, %• 1.40 5.798 43.37 2602 3.747 1.90 12.44 93 08 1111 6.90?..:,. 11,1k.1:: P12.L 11111.:,.; 1.91 12.60 ••' 94.29 ..i14.1., t .v 1.42 6 007 4191 2690 3 682 1.92 12.77 95.53 • . • ; 1,13 @•11?.,i). 1Sa17Jt.1 2(14.11 ?,9�1.;:.; I•�? 12.p1 06.18 1. 1.4;,, ;. ,,.,, .44 8.221 465 2792 4.021 1.94 13.11 08.01 ;..;`w;'''s,: 1144 4.3?9.i1::: a1,94.'1r; 7411.:i: 1Q9t:::.:145 13.27.:' 09.31 ::::i.t.i;1.40 8 439 48.17 2890 4.162 1.90 13 45 1006 't , ' ..;1.47 0.500,:... 4Q•Q9i i• 1'a10 .h, 4.233 .. 1.97 13 62 . •101.0 1.48 0 002 49 004 2090 4.306 1.08 13.70 103.2 F^:I, .10 Q,U8,,:. 0:641i: 3 ?11.:::. 4.37>74..: 1.99 13i•91 '.. 104.5 !' 'r• .' 1. .,,,,;.....0.,,,,.,q41.7sipelig•-•i.tri , 137 !; 1.60 0 889 51.64 3092 4.452 2.00 14.14 105 8 3144 3196 3249 3302 3356 • 3410 3465 3521 3577 3631 3000 3748 3808 3865 3024 39113 4044 4105 4108 4228 4200 4353 4417 4481 4546 4611 4671 4743 4810 4877 4945 5014 5083 5153 5223 5294 6365 6437 6510 5583 5657 5731 6606 5882 5058 6034 6112 0190 6268 6347 4602 1.618 .: 4.755 4.833 :. 4.911 4.090 5 070 5.151 5.232 6.314 ' 5.39/ 5.481, 5.565 6.650 '. 5.730 6.823 5 011 0.999 ', 6 088 6.178 6.269 8.360 ''. 0.453 8.546 6640 6.735 6 830 6.928 7.024 7.121 7.220 7.320 •• 7.420 7.521• 7 G24 7.12u 7 630 7.936 8.040 8.148 8253 8.381 8.470 8579 8 690 8AOI 8.013 9.020.. • 9.140 •r ZLIA PROJECT � 4fi< ,G -'- AJ t 77c (./ 1 Aidf/C-x.3 TYPE !1 &Z, CONTENTS t. Arc;ciAJC.Fail /Gaa 21/c‘ Aga (/6„r)(5./4-)(,-)1 V DAT Mattern & Craig =. COMM NO. /4574 PREL__FINAL ___— SHEET NO. 1 CAL. BY OAY CKD. BY Sk. : Cam, a r� /,-I / ir, o = '- 5/OF #r a zit /1 5 % / s ry./C. r .3 Z k 1 �/ = X f• CS. ) 35: /'; f A c-% ii6v)-2.- ./..2 - ( CI iJ� ((i2or. (g.?4(/#)(045) — 7 PPS 36G - 6%.'w �. ilaxivzseP- Pe--77/4 r?=.73 D .01 c7,11.iP4. • aka Li/� ✓ ! 5`'�4.4 ;',GQ�I ; ' ' . 14•1/ g(15... e4 .: • •' ...". ' � � .. • -• ..fir � % T�R�•t • w. A. .• •r:_ .-- .04-2.V.ice %se •�`�' f�. '. '-• . i.. , • .- PROJECT TYPE CONTENTS Mattern. & Craig DATE_00c COMM Nb''`�'1S7,i PREL___F1NAL SHEET NO. 8 CAL BYE% "7 CKD. BY' • a: i r a 1, 4 • JO EA./ 7:cf„,a0 ZdLo" -t . A d I Ce.R - • may ... •. -.s' • 1'-••.�� ••-T�<� -i+ • . :.«. •:L _Y s: •• .. .:.'' r.l moo.!' f.y:i a .. •• • .++. t• Nam\,•.i ••f.•:' i • t•3:-• ` f'� ♦�!- X•�•-•rT ti� r-n: +�t \•!•, fir: aCt.�y • 11, ►Sae-tl3s?e }.ate • 'i�1. X.t`f yt,.•'/�.•��•`t=•�ti' • : v:'.y ±�S .A .-Ty"- jai ••• `'• , •N h ••• • • ... ; • 4' • PROJECT CA5/4161es �W-re • TUC A-5676E:-. TYPE C,aGalt>477o6kJ /)ECE.o/ . CONTENTS DATE CONSULTING ENGINEERS • SURVEYORS COMM NO. PREL._FINA� SHEET NO. I CAL. BY CKD. BY 4 54,1 • 1..A.) o ; i'cr A CVAX ced -ra F/LrEREi 'e, = 3o in ix) N4 AJ o- Z xioZ _1— io (i�.z3 c{f) ('4o.3 4.0-3 36.ai•-1=1 4- o. Z3 Ct Ct 155.5 Ms lQ • co2 Paler. z • s • fri4(1) (Z5)= 1316 D° v"/ zo./„„,„,y -x.°1; : P-7/ oo m p r� I� Sa.1 SteE CO M r3t'!? To lia0V 1 30 ins) 1�.T0,-)T7°J 2P8 (o,00O 610 kiJa fri/a_� � �/rn)('3m'cod • u083 27 tit-6067At.)�(7.vs c�/cr) Q = 6.2(41 G/1)').)/(?s'16 latc) ' - ---ASc:u ''''. •-s , . •CP • : y • = I' . r': �.S7�i »71':'�_ !R�►'�9 E; •-'L !� ' +v�s+7+%�•.f.:i�Y � • • • •,• • • '•••• ••• • : !- .. PROJECT TYPE CONTENTS • V DrZ/41-04. Arn Be% CONSUL1ING ENGINEERS • SURVEYORS DATF COMM NO PREL FINAL SHEET NO. CAL BY CKD. BY 17 /10 Fl-vair /F-r-e)See PzATE Le A?c 3 (4,4')- it-27-61 5 r ry-zr. C ni ke— r Fig) 41, Si FE CA.OZAM-114 - PeAr • • • (5. zfri te)(0 44-7o z ,$)(8 %A) = e hiti CC..2 ZoJuE u ST" V 1 oo Co:or204. u tr ibkr R.DTvritz.12.. ) O/ kal •of-dke (5.2,111.e)(0,v.f4610) .9.3q 14/641. 8 7 • . •••• - • - • • • •••• • .d yz.m.)V6-26 • . . ?Wt... • . Isn.16 yr. .i•-•ei•%' 4 . . ;VI . ••7T",.4.1:1'-• 4.4 3 7., • • - PROJECT TYPE CONTENTS MatIem & Craig CONSULTING ENGINEERS • SURVEYORS DATF COMM NO. PREL._FINAL SHEET NO. ._ CAL. BY CKD. BY b C.&okivA-7/0 ,..J - soZ -70sAcc-42a (0, 9 /7-1.€)/.0% a...) 851 E G�! (ha fps /2 )/ me it at) 1.0 (54)-:; S .11 M 1.Q '5.41 • i1,•t•:? mac: �'7����.y�-•M *173 • 1-2E - Poke (s.-L m�12)(z 1460)(2.$)(8,3q1 %440)--7 zi .7 W/T�, l Pi2DviD w47- Via) CoNrIo uurl /2 ,7r , e va Av4 60%. usAcie i 014 /Q YD. y ii160, C8. 311 4.44., /SD CYUmDies 04. • .r "r.f )wI Z• .. .. .ri.f. •,• 8.7'/� { r 14 •{l �f .' v�.tii �• i•(•� �Z ..• .i1, D1�• 1•.!•2' j `l�• :;I:•ti •• ,� 1•� .! 1�.. s1• ham: _ '•�'�•i-:-t.%L ���' -'.c.; _ s.. pia !: INSTALLATION INJECTOR HYDRAULIC OPERATING REQUIREMENTS DATA 200 150 20 10 3/4" Fixed Throat Injector 1 5.170 INJECTOR INLET PRESSURE VS. THROAT & TAILPIECE SELECTION 80-1400 45-16514 80-1400 55-16514 50-242J 85-1400 73-16514 62-1935 55-242J 95-1400 90-16514 80-1933 65-2423 135-1400 105-19314 95-242J 205-1201' 175-1401' 160-1650 140-19314 120-242H 230-1201' 200-1401' 185-1650 175-193G 155-242H 230-1401' 220-1650 195-1930 185-242H 265-1401' 222-193G 250-1930 280-1930 55-1400 85-1201' 95-1201' 110-1201' 145-1201' 175-1201' 215-120E 235-120E 265-120E 255-1651' 300-1651' 40-16514 55-1400 65-1400 80-1400 115-1401' 150-1401' 185-1401' 220-1401' 222-1651' 240-1930 270-1930 35-242J 50-165H 63-16514 70-19314 110-1650 140-1650 170-1651' 190-1651' 210-1930 45-1933 53-1933 55-242J 95-19314 125-1930 150-193G 180-1930 40-2423 45-2423 65-24214 115-24214 100-84D 100-99E 15C-94D 170-840 200-84D 185-990 185-120E 215-120E 255-120E 300-120E 300-1651' 80-99E 60-1201' 123-99E 145- 990 175-990 160-120E 170-1401' 205-1401' 245-1401' 285-1401' 250-1935 45-1201' 50-1400 73-1201' 85-1201' 125-1201' 140-140F 155-1651' 185-1651' 222-1651' 260-1651' 30-165H 40-15514 55-14CG 75-140G 105-1401' 130-1651' 135-1935 160-1935 190-193S 220-1935 25-2423 35-1933 5C-.65H 65-1650 100-1650 115-193S 30-2423 42-1933 55-1930 80-1930 35-242J 45-242J 75-70C 85-70C 92-70C 110-70C 145-70C 155-84C 185-84C 215-84C 242-99D 275-990 300-1651' 40-840 65-840 75-940 95-840 130-84D 145-990 165-990 200-990 22C-165F 260-1651' 245-193S 35-120E 50-990 65-990 85-990 120-990 135-120E 160-1401' 185-1651' 135-193S 215-1935 20-1401' 40-120E 45-120E 55-120E 95-120E 120-1401' 150-1651' 155-1935 15-1933 25-1401' 35-1401' 50-1401' 85-1401' 115-1651' 125-193S 20-1933 25-24214 40-193S 80-1651' 95-193S 70-193 S 35-70C 40-70C 45-70C 55-70C 100-708 135-708 175-708 230-708 260-848 300-848 300-990 25-840 35-840 43-840 50-990 80-990 115-990 150-990 215-848 225-990 265-990 245-1935 15-1401' 20-1401' I5-140G 45-1401' 65-1935 95-193S 125-193S 190-990 195-1935 215-193S 10-1930 15-1930 23-1930 35-193G 155-193S 25-70C 30-70C 35-70C 55-7CC 100-708 135-708 175-708 230-708 260-848 300-848 300-990 15-840 25-990 3:-990 45-990 80-990 115-990 150-990 215-848 225-990 265-990 245-1935 10-1651' 20-1651' 25-193S 35-193S 654193S 95-193S 125-193S 190-990 185-193S 215-193S 155-193S I 0 NOTES 5 10 20 40 60 80 BACKPRESSURE, PSI 100 120 140 160 1. SELECTION DATA ABOVE REPRESENTS ACTUAL INJECTOR PERFORMANCE PLUS A SAFETY FACTOR ADDED TO THE OPERATING PRESSURE AND WATER FLOW REQUIREMENTS. THE SAFETY FACTOR ALLOWS FOR TYPICAL VARIATIONS IN OPERATING WATER SUPPLY OR DISCHARGE UNE HYDRAULICS AND FOR BOOSTER PUMP IMPELLER WEAR. 2. DATA APPLIES TO CHLORINE ONLY. FOR OPERATING REQUIREMENTS OF OTHER GAS FEEDERS, CONSULT FACTORY. 3. FOR FEED RATES OR BACKPRESSURES WHICH FALL BETWEEN THOSE INDICATED, IT IS RECOMMENDED THE NEXT HIGHEST VALUE BE USED. grWALLACE & TIERNAN w WALLACE & TIERNAN, INC. 25 MAIN ST., BELLEVILLE, NJ. 07109-3057 CAT. NO. 5.170 4» INJECTOR HYDRAULIC OPERATING REQUIREMENTS INSTALLATION DATA . • FLOW (GPM) 100 90 - 80- •- •:.._ 70 - - - • .. 60 - - -----_ -. 50---- 40- - 1" And 3/4" Fixed Throat Injector OPERATING WATER VS. THROAT SIZE • 30 •-•- --- - - 20 -d • •.-. 10 9- 8- -•- 6 4 1 0.9 - - -• 0.8 - - 0.7 o.s - • 0.5 0.4--=- -..- 0.3 0.1 10 iM 2 i 1 I i 1 1 1 1 30 40 50 60 CO 100 INITIAL OPERATING WATER PRESSURE (PS) 260 300 5.172 tVWMIACE &TIERNAN" WALLACE & TIERNAN, INC 25 MAIN St., BELLEVILLE, N.J. 07109-3057 CAT. NO. 5.172 • 0 • �i •�i _ ~s� Mattern & Craig 72, ° 17.0 14. PROJECT eAsat es TYPE Ge-Z TAc S J4 CONTENTS it y --G, ) ?•c i /7 -O" I` 9' /.I 1 ISLA 5rZE = 12'X 1( . ASS Mg UP - ur DATF CONSULTING ENGINEERS • SURVEYORS COMM NO. l S-7/° PREL. x FINAL SHEET NO. CAL. BY 'fig CKD. BY boo `r'2 Fzc;9 PAW (17)(9)(q sYL.z.4 qz, 9622. 1th 2Es1sr �-o2CE A..)-JSn eqZ..9404) 6g)tr- kr). 3 g Solt oN Fflor1�1L1 (q)(' y (gyp} - 17 (9).1(i/o Ice) 7-AA1k . t„ar Z 67t lC t 9 (4/, )( /!i) C1149#/CF R. s/4-r EE'Q'Q (3'r rooii .icv 413, o - 2.4.G - 3.7 = 3/ 4 • • D , , sa -.o4, = d 54`1 144 MW it7 o� Foorlw(, / = �9C� i..t) O 8 � o. ooi s (17-) - o, . • L.A404 . �. •:..;.-:i''.'.:,s •4Z.3'°ei�,1(t'''� ;�.� .z I • -•l ••'.r. it :w • • w a C Or IN PROJECT • GI/C6410 TYPE CONTENTS • -�,� ,•-.•n••1''•+�� �. ,1Lv •-•yam T��. A►ii :+• t '•s"� t par.• A a • sogm614el) L)F ec raig cONSULII G ENGiNEERS • SURVEYORS • DATF C M NO PREL. X FINA SHEET NO. 5 CAL. BY KD. BY • ih SeJ:r-el A -IA 1 • ' y j..._ .ti - •.: i. ! a r L: x. �.�'�±,ice- p •[ • • PROJECT •1 Mattern & Craig }gel TYPE CONTENTS CONSULTING ENGINES • SURVEYORS DATF COMM NO. PREL. X FINAL SHEET NO. IQ. CAL. BY CKD. BY PuAr6 oi r-rc1Sa2 7 1 z' o" •.• . ilT. , a. . Y, : c am - Sccrto ti▪ e �� • �• � ' M1 - Na R _�: fib\ -.ice: .rJ `Lt.C����Sr+Z.I. f•. :T.<: '+] 1'-J+.!�f t�.'l T'i �; ,• a .; G •��,'''▪ �'t�' it �'t.-.�a:: K-s: "�- �. _ ;NR " t PROJECT 6-eS V LJ rP TYPE Po sr / T, o..../ CONTENTS Mattern&Crthg ./pq • cONSULIING ENGINEERS • SURVEYORS DATE /.49/76 COMM NO 4bv 7 P PREL. X FINA! SHEET NO. -r CAL. BY X4'3 CKD. BY • • w 41,2 POST - Atj4'TIO »1 - Ch5 cA-O j Lart) rOe7r-A-LI• �f 1LY T-6nP roe F/G 3-'0 co G d ebbe,- ASSvrr}) -lCj 2Z o frmX 60c.t3T T/V 7E o `rE 2 A t. src A-T rerIP 9 o A?P w x E CS (t t sc �►� j.2 0 - boo mi l.Q MQ /-e - P612/Y) l r VA4t C5- c. 11.55 -!.o _ �' l+ ies'Cr &to — 1.90 I 1 f. 11 a. 6 (/t,o,rh / t .11 68)6,1) , age, (9))6) �a137 ••� t37" = 1.9 •. l , /. 9 AJ = tsi 137 = 5.0 C� T= 90� (�z 3,33(L — O.LP )14 O = 0.1 144 "- 0.31 CAS y.c ,31 r- 3,3 36. - 0.2. (,17) (.17 • • •,:/.v;•. yj,sr�--tr.• • . -ram:' ' �= �.:�{'�' �+.;.� ^'�,y7�.�•`'t`•'`+.n,,_+,j•• -71.34 .. ti ,�t� , -v�C� — ,_!r!!M!w_.lwt PROJECT Mattern& Craig 7.,11 k.1 -7- TYPE CONTENTS CONSULTING ENGINEERS • SURVEYORS DATF COMM NO. PREL. FINAL SHEET NO. CAL. BY CKD. BY *P. Ls: 3qz-7.0 ;.. 0= 0,78 ._ ./ " ' IT' - . CE s" Fi--4,• " .., •• .., . _ • • • . " ; A - -- • • Led •• •-c • • -- • •••• 19 CON. bssrei ;Nur/04 i>irFusozs t 3r T. . • • s • - - , • t • • - • -- , - - • - • •••;Z::,....Zawc**‘;c4•• -ragsfo:.; • y • -*Ir .5.11 • L..4 • ••• 4. •- ' . • ...tn '3. '-o (rre) 191 -3-12f,sa . • 71. • •• 10e. — • • • ••• • ' • • J.. • ibailsrr .• MC•I'.. CASHIERS WWTP HYDRAULIC GRADE UNIT CONTROL ELEVATION FLOW (MGD) HEAD LOSS HGL CL2/S02 90° V-notch . 3427.00 0.20 0.43 3427.43 0.50 0.63 3427.63 Piping 2-6" @ 30' & 3427.43 0.20 0 3427.43 1-8" ® 10' 3427.63 0.50 0 3427.63 Filters 60° V-notch 3430.31 0.10 0.41 3430.72 0.25 0.59 3430.90 Piping 2-6" @ 30' & 3430.72 0.20 0.02 • 3430.74 1-8" ® 150' • 3430.90 0.50 0.24 3431.14 Clarifier 3 8-90 ° V-notches 3438.45 0.10 0.08 3 43 8.53 0.25 0.11 3438.56 Piping 2-6" @ 100' 3438.53 0.20 • 0.06 3438.59 3438.56 0.50 0.36 3438.92 Aeration Basin 36' Rectangular Weir 3439.00 0.10 0.01 3439.01 w/out end contractions 0.25 0.02 3439.02 \N A TF 06 2/' if Michael F. Easley % Governor r William G. Ross, Jr., Secretary _i North Carolina Department of Environment and Natural Resources Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality Water Quality Section/ NPDES Unit FAX: (919) 733-0719 10/8/01 FAX TO: Randy Beckner FAX NUMBER: 828 254 4562 Re.: Cashiers WWTP FROM: Susan A. Wilson, P.E. PHONE: 733-5083, ext. 51 NO. OF PAGES INCLUDING THIS SHEET: 3 Randy: Here are my additional comments. Could be that you just need to point me in the right direction on some of these questions. I've had to put this project down and pick it back up again so many times I may have inadvertently shuffled new information in with old information. Just give me a call after you receive this. There are some new comments in here. Also, as I'm sure you and your client are aware — I've had many conversations with concerned citizens in this area. They've requested a public hearing (which we do not traditionally do with Authorization to Construct permits). Due to those concerns/requests, I'll have to run this one up the line after my review. Thanks Randy. Susan Cashiers WWTP Page 1 Tuckaseigee/ Cashiers WWTP NC0063321 ATC 06332 1ACF 10/8/01 Randy - on the correspondence of 3/23/01 and 4/24/01, since there are some statements in the correspondence and I'm accepting them as fact, I'd prefer your stamp and signature as a P.E. on them (rather than someone signing for you). A copy of them with your signature/stamp is fine. Information still needed: Headworks: (I don't have - or can't find - documentation of this), the 3/23/01 letter states that this was addressed in the revised design notes (either I've misplaced that or I didn't get that). Equalization: What is the existing equalization capacity? (I'm still having difficulty locating this information from your recent submittal). Proposed part of the plant indicates 25,000 gallons. At least 25% of ADD (0.2 MGD) of EQ must be provided (= 50,000 gals.). Aeration Basin (I still need clarification with this): Calculations regarding mixing and aeration requirements to comply with the more stringent limits at the expanded flow (0.2 MGD) . Can existing package plant comply with more stringent limits (What is detention time in existing basin? Will existing clarifier/digester be used?) There is no statement/information in the specs. relating the ADD flow and limits that must be met. Also, I need documentation of the total aeration requirements at the plant vs. what is supplied (including EQ, post aeration, digesters, etc.) Digesters (still need clarification on this) : What is total digester capacity? Please provide calculations to ensure that provided capacity can conform with 30 day holding time. It's still unclear (to me) from the most recent submittal what the existing digester capacity is (I see from your response that the existing digester will be used). Also, although I follow your calcs. with regard to digestion capacity for the new digester, please explain how the Yobs of 0.31 was determined. This seems fairly low for typical wastewater. Clarifiers: The overflow rate for the existing clarifiers appears high. Based on a surface area of 288 ft2, the peak overflow rate would be 868 gpd/ft2 (this is outside the typical range of 600-800 gpd/ft2). Unfortunately, this apparently was not addressed in the previous Authorization to Construct and may be a source of problems now, as the existing plant approaches design flow. Please discuss with the owner how this may be addressed to prevent problems in the future. The additional equalization with the expansion phase may reduce this problem for a period of time until flows again approach design levels. Cashiers WWTP Page 2 Filters: The calculations for the filters are adequate and within design range. However, the most recent inspection report noted a problem with the operation of the filters (this could be attributable to the elevated clarifier peak overflow rate and a subsequent washout of solids - however, this is speculative) . Please discuss this problem with the operator and owner. We'll likely put some type of clause in the ATC requiring an optimization plan or operational inspection of the filters. Blowers: Are/will the blower enclosures be insulated? Can any other efforts be made to reduce noise? Standby power (I don't think I originally asked for this and I should have) : Provide information re. standby power currently supplied and currently required for the additional treatment units. s• Mattern & Craig SINCE 1978 ,, ! I I N CONSULTING ENGINEERS•SUR'JEYOI S J. Wayne Craig Stewart W. Hubbell Gene R. Cress Michael S. Agee Steven A. Campbell Wm James Jones Randy W. Beckner April 24, 2001 Susan A. Wilson NCDENR Suite 942 512 N. Salisbury Street Raleigh, NC 27604 Re: Cashiers WWTP Reply to Comments Comm. No. 1457P Dear Susan, 1 2 2001 i j1 Wm. ThomAus DENR -WATER QU,f�'lley C. Cr. PONT SOURCE BRA1d P. Wils g n Edwin K. Mattern. Jr. (1949-1982) Sam H. McGhee. Ill (Retired) In replying to your comment letter of March 6, 2001, we failed to include a revision to the specifications which was indicated as completed. Comment No. 5 asked for a blower size. The sizing information was left out of the specifications. The following revision has been made to the specifications: Section 11251— 2.1.E.10. The blowers shall be Model 4A Universal RAI frame size 56, as manufactured by Roots Division of Dresser Industries, Inc. Each blower shall be capable of producing 415 SCFM @ 5 PSI at sea level, 70F. Project site elevation is 3440 feet. Blowers shall deliver the required volume at 3440 feet at 90F. Motor shall be 20 HP, 240 VAC, 3 Phase. If you have any questions, please do not hesitate to contact me. Sincerely, MATTERN & CRAIG RWB/dm Randy W. Beckner, P.E. Principal 429 Clay Street, Kingsport, Tennessee 37660 (423) 245-4970 Fax (423) 245-5932 SINCE Mattern & Craig 1978 CONSULTING ENGINEERS.SURVEYORS J. Wayne Craig Stewart W. Hubbell Gene R. Cress Michael S. Agee Steven A. Campbell Wm. James Jones Randy W. Beckner March 23, 2001 Susan A. Wilson NCDENR Suite 942 512 N. Salisbury Street Raleigh, NC 27604 Re: Cashiers WWTP Reply to Comments Comm. No. Dear Susan, Wm. Thomas Austin Bradley C. Craig David P. Wilson Edwin K. Mattern, Jr. (1949-1982) Sam H. McGhee, III (Retired) We received your letter of March 6, 2001 concerning comments on Cashiers WWTP. Enclosed are our responses to your comments. Where required, revised design notes were prepared. For continuity, a complete set of design notes, including revisions is included. 1. A construction sequence is provided. A hydraulic profile is included. 2. The existing headworks can accommodate the increased flow. This is addressed in the revised design notes. 3. An equalization basin has been added. 4. Detention time for the existing aeration basin is calculated in revised design notes. 5. The new blower size is indicated in the specifications. The new blowers will ,, include noise reduction — a fiberglass enclosure is shown on the drawings. 6. Digester capacity and design notes are included. 7. The existing digester will be used. A revised summary table is included in the design notes addressing these design issues. 8. Filter loading rates are included on the summary table. The filter bypass is eliminated. 9. The chlorine contact basin has been revised and a separate post aeration basin provided. 10. These comments are addressed in a separate letter, attached to this letter. 11. The treatment plant meets these buffer requirements. Although not indicated on the plans, buffer areas around the proposed plant are adequate to meet these requirements. 12 Broad Street, Asheville, North Carolina 28801 (828) 254-2201 Fax (828) 254-4562 Susan A. Wilson March 23, 2001 Page 2 If you have any questions, please do not hesitate to contact me. Sincerely, MATTERN & CRAIG Randy W. Beckner, P.E. Principal RWB/rjm cc: Jerry King, Tuckaseigee WASA J. Wayne Craig Stewart W. Hubbell Gene R. Cress Michael S. Agee Steven A. Campbell Wm. James Jones Randy W. Beckner Susan A. Wilson NCDENR Division of Water Quality Suite 942 512 N. Salisbury Street Raleigh, NC 27604 Dear Susan, I9C Mattern & Craig S CONSULTING ENGINEERS' SURVEYORS March 23, 2001 Wm. Thomas Austin Bradley C. Craig David P. Wilson Edwin K. Mattern, Jr. (1949-1982) Sam H. McGhee, III (Retired) Re: Cashiers WWTP Reply to Comments by W. E. Anderson, May 3, 2000 Comm. No. We received your letter of March 6, 2001 concerning comments on Cashiers WWTP. In this letter you asked for responses to a memorandum prepared by W. E. Anderson, Regional Water Quality Supervisor, Asheville Region. Enclosed are our responses to Mr. Anderson's comments. 1. These floor drains drain with the scum system which drains to the filter backwash pumps at an elevation approximately 2 feet lower than the floor drains. 2. An air line is run from the blowers to the filters for air scour. 3. The filter tank overflow has been eliminated on sheet 8. 4. The sampler line is run over the wall, and is shown on sheet 9. 5. The sampler is flow proportioned, as specified in section 11251-2.06.D3.b. 6. The air diffusers have been relocated to the post aeration tank. 7. The aerators were removed from the chlorine tank. Besides this change, we are comfortable with the layout of the chlorine/sulfur dioxide contact tank. 8. Design notes showing digester sludge storage are included. A minimum of 30 days storage is provided. 9. An additional 25,000 gallons of equalization storage is provided. 10. Sheets 11 and 12 show the exhaust fan details. Each fan exhausts directly through the roof. In addition, a fresh air vent is detailed on sheet 12. 11. The SCBA is relocated outside, although we would prefer that it be mounted inside the building. This will keep the equipment in better condition, protect it from freezing temperatures, and reduce the possibility of vandalism. OO 12 Broad Street, Asheville, North Carolina 28801 (828) 254-2201 Fax (828) 254-4562 Ms. Susan Wilson March 23, 2001 Page 2 12. The gas detector on sheet 10 has a note to locate it 12-inches above finished floor. 13. There is a second door on the building. 14. We have reviewed the plans for elevation anomalies. In addition, we have provided a hydraulic profile in the design notes. 15. Truck access to the filters is provided. If you have any questions, please do not hesitate to contact me. Sincerely, MATTERN & CRAIG Randy W. Beckner, P.E. Principal RWB/rjm cc: Jerry King, Tuckaseigee WASA March 23, 2001 Susan A. Wilson NCDENR 1617 Mail Service Center Raleigh, NC 27699-1617 Re: Cashiers WWTP Reply to Comments Comm. No. Dear Susan, We received your letter of March 6, 2001 concerning comments on Cashiers WWTP. Enclosed are our responses to your comments. Where required, revised design notes were prepared. For continuity, a complete set of design notes, including revisions is included. 1. A construction sequence is provided. A hydraulic profile is included. 2. The existing headworks can accommodate the increased flow. This is addressed in the revised design notes. 3. An equalization basin has been added. 4. Detention time for the existing aeration basin is calculated in revised design notes. 5. The new blower size is indicated in the specifications. The new blowers will include noise reduction — a fiberglass enclosure is shown on the drawings. 6. Digester capacity and design notes are included. 7. The existing digester will be used. A revised summary table is included in the design notes addressing these design issues. 8. Filter loading rates are included on the summary table. The filter bypass is eliminated. 9. The chlorine contact basin has been revised and a separate post aeration basin provided. 10. These comments are addressed in a separate letter, attached to this letter. 11. The treatment plant meets these buffer requirements. Although not indicated on the plans, buffer areas around the proposed plant are adequate to meet these requirements. Susan A. Wilson March 23, 2001 Page 2 If you have any questions, please do not hesitate to contact me. ``00111111/I1,,,i its sio ': _ a 20327 -13 1 • i +}mil: Air t t ,-,"}/1/11111to RWB/rjm cc: Jerry King, Tuckaseigee WASA Sincerely, MATTERN & CRAIG "AT Randy W. Beckner, P.E. Principal Sequence of Construction Tuckaseigeee WASA Cashiers WWTP The new equipment was coordinated with existing equipment during design phase to minimize issues during construction. The entire existing plant may remain operational, without disconnecting equipment or relying on new equipment at intermediate steps. Below is listed a possible sequence of construction. The contractor may perform the work in a different manner or schedule, as he requires. The contractor is required to maintain proper operation of the plant and meet all NPDES limits and during plant upgrade. 1. Install new treatment equipment: a. package plant b. clarifiers c. filters 2. Construct new chlorine contact tank and post aeration chamber 3. Install blowers 4. Construct new control building including chlorine and sulfur dioxide equipment 5. Install new connecting lines (i.e., filter backwash, drain lines, etc.) 6. Connect new equipment from back of plant: a. Post aearation b. Chlorination/dechlorination c. Filters d. Clarifiers e. New package plant 7. Fill equipment with effluent to test 8. Complete equipment startup 9. Drain effluent and fill one train with sewage 10. Ensure plant is meeting operational limits Om v) o z- o Z g o il f- 14 K1 w J i_ W 0 a m Y 0 CAL. BY nil (-- 0 r' U W 0 cr a. 0 CONTENTS T.O.\I) 3`-1L43,50 -row 34110.Oo -, % 34153.S6 — t 1 auv 342.53.(07 (._ (?:---.--.. 312 1 �--- 31433:400 34z.'7, a-io' �! FA kites Mcdia 343o. CS' Weer 34 3°1.M v_ , 343'i, 50' y %N V 3'43Z:75' —/ 3444.5 O vatic 3L13ca.451 6'' Effiuc.y 31-253.1-1 Atrairion QaSI r1 3430, 3Z.- a ��ati wcid` 3430.63 3930.T7 p.m- - 1424.61 1342.0 , 0`7 /i342»'3 -r.o.w. 342.(,C0 s '�— 3424,cp' Cvvflfer. 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BY 0,741 11 i„ v f14; 7(0 . 3 ��C. n• L� END 1 s 14.11 Zac,- 1 -) L ft(1 34 ) oL) I`1 4+-L: P a• S 3 H Li a-3> % L o - C[9 , 2, `, , L if, 3 K, _ £ Go it, /6, LJ O ..1 ) �3co I,'/A to, laL Fri 7.`-tY 5`D o J'/9' Y 3 o V �9- �r v y"t9cJ x 3 v : /S Uva C. tie, o((p. s-v iZSP'(am..e,re) ��-r- L� �.� ,1 / 3g/, aTJ EXHIBIT PROJECT TYPE CONTENTS ZPPq Mattern & Craig CONSULTING ENGINEERS. SURVEYORS DATF 3 - 7- v 1 COMM NO PREL FINAL`' SHEET NO CAL. BY 4011 CKD. BY r 1 L- 1`e'TL $ L {> mil r e- 41 w U, .s rr 14D. 1 / 6,2 ZS !J/ r-, to z ) = I /, 1.0 r27- 37, - r- L P4 73 - L o A 4o 10,1 Ca. - ! 7 3 , j t• Pri 14, CoPv-1 GT'Z- b Co 9, y pv-i `, L P PI AV Co, 19, L PI Ft yr. Prc EXHIBIT . OF W A T9 Michael F. Easley Governor 7' NCDENR William G. Ross, Secretary North Carolina Department of Environment and Natural Resources Kerr T. Stevens, Director Division of Water Quality Water Quality Section/ NPDES Unit FAX: (919) 733-0719 3/22/01 FAX TO: Alan Morris FAX NUMBER: 423/245-5932 Re.: Cashiers WWTP FROM: Susan A. Wilson ift..11 PHONE: 733-5083, ext. 510 NO. OF PAGES INCLUDING THIS SHEET: 0 3 Alan, Here's the fax of the staff report submitted by Bill Anderson (formerly of our Asheville Regional Office). I had originally faxed this to Jim Jones of your office. Thanks for you help. Susan SOC PRIORITY PROJECT:No To: Permits and Engineering Unit Water Quality Section Attention:Christie Jackson AUTHORIZATION TO CONSTRUCT 063321ACF REPORT AND RECOMMENDATIONS Date May 3, 2000 COUNTY Jackson PERMIT NUMBER NC0063321 PART I - GENERAL INFORMATION 1 MAY 1 0 2000 BE"IR - WATER QUALITY PUNT SOURCE BRANCH L 1. Facility Name and Current Address: TWASA Plant 3 Post Office Box 1051 Sylva, NC 28779 2. Changes since previous action on NPDES Permit: None 3. Compare Discharge Point(s) on plans with NPDES Permit application. List of all discharge points: IXXI No Change I -I Change New Latitude: 0 , Longitude: o PART II - EVALUATION AND RECOMMENDATIONS If you have questions or want to discuss the plans, please let me know. The following problems were noted (in no particular order): 1. The floor drains in the pump building are 3 feet lower than the water level in the clarifier. Under certain (maybe all) conditions this will allow three feet of sludge to gravity flow into the building. 2. The filters need the air scour connected. 3. Regulations require that the filter tank overflows be eliminated. 4. The effluent can gravity flow into the sampler. It would be better if the sample line ran over the tank sidewall, or raise the sampler mount. 1 5. Flow proportioned sampling should be provided. 6. There appears to be air diffusers in the chlorine contact tank but no chlorine. Aerating this tank is probably no1a good idea. Aerating downstream of SO2 contact would be a good idea. 7. The layout of the chlorine/SO2 contact tank should probably be rethought. 8. The existing facility is woefully short on sludge storage/digester space. We need to make sure at least 30 days storage is provided. 9. The A to C for the existing flow eqalization tank indicates that it is 25,000 gallons, an additional 25,000 of flow eq. will be required. 10.How the fans work and where they exhaust to should be clarified. If the bathroom exhaust fan is running and no source of air is provided for, and all these fans exhaust into the same pipe or space, chlorine or SO2 could be sucked into the office side. The ventilation design should consider that these gasses are heavier than air and are very corrosive. 11.The SCBA should be outside. 12.The gas detector should be at floor level. 13.The building should have a window (escape hatch) on the side opposite the door. 14.The previous plans for this expansion had some elevation anomalies. Flow elevation contours should be provided. 15.Truck access to the filters is needed. repare By/Date W.E. Anderson. May 3, 2000 Water quality Regional Supervisor 2 State of North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross, Jr., Secretary Kerr T Stevens, Director March 6, 2001 Mr. Randy Beckner. P.E. Mattern & Craig, Inc. 12 Broad Street Asheville, NC 28801 NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Subject: Authorization to Construct Permit Tuckaseigee WASA Cashiers WWTP ATC Permit No. 063321ACF Permit No. NC0063321 Jackson County Dear Mr. Beckner: This letter is offered in follow-up to the facsimile transmission sent to you December 12, 2000. The following concerns were noted and must be addressed/resolved prior to issuance of the Authorization to Construct permit. 1. Please provide the construction sequence for the expansion. All existing limits must be met during the construction phase. Also, please provide a hydraulic profile of the plant. 2. Please provide documentation that the existing headworks can accommodate the increased average daily flow (ADD) of 0.2 MGD (and peak flows). 3. Provide documentation of the existing equalization capacity. At lease 25% of ADD must be provided at the plant [ref. 15A NCAC 2H .0219(j)(6)]. 4. The capability of the existing package plant to comply with the more stringent limits must be documented and calculations supplied (or combined for the expanded plant). [This should include the detention time of the existing basin and if the existing clarifier and digester will be used]. 5. Blower sizes, number, and the CFM -must be supplied. Also, the NPDES permit for Cashiers WWTP requires noise reduction on all blowers - this should be documented in the plans and specifications. 6. Total digester capacity must be provided, along with calculations to ensure that the provided capacity can conform to the required 30 day holding time. [ref. 15A NCAC 2H .0219(j)(9)1. 7. Provide calculations regarding the detention time, surface loading, and overflow rate of the clarifiers. 8. Please provide the loading rate for the filters. There appears to be a bypass around the filters [bypasses of treatment units are not allowed]. 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083. extension 510 (fax) 919 733.0719 An Equal opportunity Affirmative Action Employer Susan.AWilson@ncmail.net Mr. Randy Beckner Page 2 9. With regard to the chlorine contact basin. please explain why diffusers have been added to the chlorine contact basin - this is not recommended practice. It appears that chlorine is being added to the manhole prior to the basin - is this the primary place of chlorine addition to provide disinfection. Calculations regarding total detention time should be provided. 10. Comments provided by William Anderson, formerly of DWQs Asheville Regional Office. were faxed to Jim Jones, P.E. July 17, 2000. These comments should also be addressed. 11. Although not addressed within the fax submitted in December, please provide documentation that the treatment plant expansion will comply with the buffer requirements specified in 15A NCAC 2H .0219(j)(5). As specified in the rules regarding minimum design requirements. the facility should be 100 ft. or more from a residence, 100 ft. from a water supply well, 50 ft. or more from a stream, 50 ft. from an adjacent property line. 12. Provide equivalent volumes of treatment units at ADD flows. Please submit the above information within 30 days of receipt of this letter or the project may be returned as incomplete. You may contact me at (919) 733 - 5083, extension 510. should you have further questions. Sincerely, /5usan A. Wilson, P.E. NPDES Unit cc: Asheville Regional Office/Water Quality Section/ Kevin Barnett NPDES Unit Mr. Jerry King Tuckaseigee WASA P.O. Box 1051 Sylva. NC 28779 State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director QA DENR Division of Water Quality NPDES Unit FAX: (919) 733-9919 / I 1 FAX TO: Randy Beckner, P.E. FAX NUMBER: 828/ 254-4562 Re.: Cashiers WWTP Expansion FROM: Susan A. Wilson, P.E. PHONE: 733-5083, ext. 510 NO. OF PAGES INCLUDING THIS SHEET: 2 Randy, Finally got around to reviewing the Cashiers ATC. Please take a look at my comments (just did these informally to speed things up) and point me in the right direction or provide info. as necessary. Give me a call and we can discuss after you've looked at the comments. I need you to run me through the plans so I am sure I know what's being done and the sequence of treatment. I faxed some comments Bill Anderson (ARO) had provided me in May, so you may want to look at those as well. Thanks. Susan Cashiers WWTP NC0063321 ATC 06332 1ACF 12/12/00 Information still needed: P1'ease provide the construction sequence. )Ieadworks: Can existing headworks accommodate increased flow of 0.2 MGD? ualization: at is the existing equalization capacity? At least 25% of ADD of EQ must be provided. Aeration Basin: Provide CFM of air supplied. ,Blower sizes? V Can existing package plant comply with more stringent limits (What is detention time in existing basin? Will existing clarifier/digester be used?) There is no statement/information in the specs. relating the ADD flow and limits that must be met. .Digesters: What is total digester capacity? Please provide calculations to ensure that provided capacity can conform with 30 day holding time. Clarifiers: Provide calculations regarding detention time, surface loading, and overflow rate. Filters: Provide calculations for loading rate (gpm/ft2). There appears to be a bypass around the filters. Bypasses are not allowed. Blowers: Provide CFM supplied and that required with additional equipment. Also, the NPDES permit required noise reduction on all blowers - this will also be required with any additional blowers. Standby power: Provide information re. standby power currently supplied and currently required for the additional treatment units. !,"iease provide a hydraulic profile for the plant. Flow proportional sampling is required with the expansion of the plant to 0.2 MGD. Chlorine Contact basin: Please explain why diffusers have been added to the chlorine contact basin - this is not recommended practice. It appears that chlorine is being added to the manhole prior to the basin - is this the primary place of chlorine addition to provide disinfection? State of North Carolina and Natural Resources Department of Environment Division of Water Quality A7IPTA iv, James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director DENR Division of Water Quality NPDES Unit FAX: (919) 733-9919 7/17/00 FAX TO: Jim Jones FAX NUMBER: 828/254-4562 Re.: Cashier, ARO comments FROM: Susan A. Wilson PHONE: 733-5083, ext. 5 0 NO. OF PAGES INCLUDING THIS SHEET: 3 Jim, Per our conversation, here is a copy of the staff report from Bill Anderson of the Asheville Regional Office. Please review his comments. I have not yet reviewed the project but wanted to give you a 'heads -up' on his comments. Likely, I'II have some similar comments (some comments are corrections that need to be made - likely my comments would just pertain to the treatment system). Specifically, comment nos. 2, 5, 6, 8, and 14 must be addressed prior to receipt of approval from DWQ. Affer I review, I'll give you a ring so we may discuss. Thanks. Susan A. Wilson, P.E. ** If you have received this fax by mistake call: (919) 733-5083, ext. 510 or ext. 511. State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holmann. Secretary Kerr T. Stevens, Director April 27, 2000 Mr. Jerry King Tuckaseigec W & SA P.O. Box 1051 Sylva, North Carolina 28779 AlrYlr.4417A NCDENR Subject: ATC Request Acknowledgment NPDES Permit NC0063321 ATC Number 063321ACF Cashiers WWTP Jackson County Dear Mr. King: The Division of Water Quality's NPDES Unit hereby acknowledges receipt of your request for Authorization to Construct (ATC) in accordance with NPDES Permit Number NC0063321 on March 14, 2000. This application has been assigned the number highlighted above. Please be aware that the Division's regional office, copied below, must provide recommendations from the Regional Supervisor prior to final action by the Division. The ATC review process generally takes 90 days from the date your complete submittal is received, however, due to current staff shortages that review period may take longer. Should any additional information be required, the review engineer will contact you. If you have any questions, please contact Ms. Christie Jackson (919) 733-5083, extension 538. PLEASE REFER TO THE ABOVE APPLICATION NUMBER WHEN MAKING ANY INQUIRIES ABOUT THIS APPLICATION. cc: Asheville Regional Office NPDES Unit Permit File Mr. Wm. James Jones, 1'.1:. Sincerely, David A. Goodrich Supervisor, NPDES Unit Mattern & Craig 12 Broad Street Asheville, NC 28801 P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-5083 FAX 919-733-0719 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper ATC PROCESSING Facility: jq2T/1 (ain (1as/iIe/' I v 1117P PROCESSING ASSISTANT NPDES No.: ���� / " p. CHECK LIST ATC No.: .22/ C SCOPE of Project: gX.PaitiCiOri o F.zu l/ Pull existing permit, (is this action allowed?): S • Will this activity require a change notice to compliance? , Point Assignment: OW SUBMITTAL: Letter of Request from the Permittee (3) Plans, Specifications and Design Calculations * signed & sealed by NC PE ? * three sets of each? ACTION: rejection reason): ✓ hold for : </ i fie_( i/WL' 00 V accept (date): Li/ •-, ' NO LOG IN & DISPERSAL (Once package is complete): Log on the Units' ATC data base ►/Log on NVCC / determine the ATC number/ create and print out tracking slip Create and send acknowledge letter (date senIt): to permittee 4/ Z'i ( C7 * to consultant 'Zr,T UD * to NPDES file Y 2-7(�o L� Request Staff Report from Regional Office sent on: Lf /L7l (l) (assemble the following and mail by courier to the appropriate RO): * copy of the acknowledgment letter (highlight RO), * copy of the request letter, copy of submittal package (plans, specs and calculations), ASSIGNED: l,reviewer: /V/ 1&00 date: Lf /a27/0O update tracking: ATC process 8/27/98 F 7 I My Ler-i rozy: ineLT hic (e-lb- di nor'- ic Atil--ed Jinn 7ici tn,L wha_l11 inarea‘ce: wazdd c.6 z thecic t& receive_ am(/' tekalcalif___flyzn______en - actid Makt p7,6 6 ll 01.02 so avid ws- i41-777;ned 51/1a/ 1 ir .Thekt, e ha_ve, 4-hi cuqd acfroAilectgeA than& Chi-g-k) 1 Mattern & Craig S 1978 CONSULTING ENGINEERS•SURVEYORS J. Wayne Craig Stewart W. Hubbell Gene R. Cress Michael S. Agee Steven A. Campbell Wm. James Jones Randy W. Beckner Mr. Mark McIntire NPDES Unit North Carolina Division of Water Quality P.O. Box 29535 Raleigh, NC 27626-0535 Dear Mark: March 6, 2000 Q Er DENR - WATER QUALITY POINT SOURCE BRANCH Wm. Thomas Austin Bradley C. Craig David P. Wilson Jr. (1949-1982) ee. III (Retired) Re: Cashiers WWTP Upgrade, Jackson County Permit # AC0063321 Comm # 1457H As discussed in our telephone conversation of February 29, 2000, we would like to provide additional information concerning the above -referenced project. This project includes expanding the existing treatment facility. To date, no construction has taken place. Overall, the project consists of constructing the following items: • a new aeration basin • a new office building • a new RAS/WAS pumping station • two secondary clarifiers • a tertiary filter unit • a chlorination/dechlorination chamber • associated piping, appurtenances, and flow control structures The project was originally planned to be constructed in two phases. An Authorization to Construct was previously issued for Phase I of this project. The project is now planned to be constructed in a single phase. The items included in the Authorization to Construct were for Phase I were: • the eastern secondary clarifier • the RAS/WAS pumping station • the splitter box • the junction box 12 Broad Street, Asheville, North Carolina 28801 (828) 254-2201 Fax (828) 254-4562 Mark McIntire March 01, 2000 Page 2 On February 21, 2000 an amendment to the Authorization to Construct was requested. The purpose of this amendment is to combine both Phase I and Phase II into a single Authorization to Construct. The items included in the amendment are: • the new aeration basin • the new office building • the western secondary clarifier • the tertiary filter unit • the chlorination/dechlorination chamber Thank you for your assistance in this matter. Please feel free to call with any questions. Very Truly Yours, MATTERN & CRAIG, INC. Wm. es Jone , P.E Prin pal cc: Jerry King C:IPR0IECTSU457n1LE RSIMCErrnRE 03-06-OO.wpD s• f. I. PLANT DESIGN REQUIREMENTS Plant shall be designed to treat municipal waster water to the levels indicated below. Provide complete design notes showing design with in North Carolina guidelines. Design Parameters (Monthly Average) Influent BOD 200 mg/1 TSS 200 mg/1 Effluent BOD 15 mg/1 TSS 30 mg/1 NH3 as N 4.8 mg/1 (Nov — March) 2.2 mg/1 (April — Oct) Design Parameters (Weekly Average) BOD 22.5 mg/1 TSS 45 mg/1 Average Daily Design Flows 0.2 MGD total, or 0.1 MGD per train 0.4 MGD Peak flow, with equalization basin 0.5 MGD Peak Flow to equalization basin 2.02 SECONDARY BRIDGE SUPPORTED FIELD ERECTED STEEL CLARIFIER A. SHOP DRAWINGS 1. Each set of shop drawings shall include but not necessarily be limited to: a) Drawings showing dimensions of all major components and minimum required spacings. b) Complete installation instructions including anchor bolt layout, piping details and mechanical connections. c) Electrical control data covering the following details: 1) Approximate enclosure dimensions including height, width, and depth. 2) Maximum wire size (main terminal block or disconnect device.) 3) Air circuit breaker data including: function, reference designator, frame size, poles, rated current, and estimated load. 4) Motor starter data including: function, reference designator, NEMA size, service voltage, phase, number of overload heaters, and coil voltage. 5) Motor data including: function, horsepower, phase, frequency, voltage, approximate full load current, service factor, nominal RPM, frame size, NEMA speed torque design, and insulation class. 6) A control schematic diagram shall be provided that shows power and control 11251 -9 b. The motor shall be sized for appropriate horsepower, RPM and other appropriate electrical characteristics as determined for the application, but shall be 20 horsepower as a minimum. 10. The blowers shall be Model 4A Universal RAI frame size 56 as manufactured by Roots Division of Dresser Industries, Inc. Each blower shall be capable of producing 455 SCFM @ 5 PSI at sea level, 70° F. Project site elevation is 3440 feet. blowers shall deliver required volume at 3440 feet at 90° F. Motor shall be 20HP, 240 VAC, 3 phase. 11. Non -corrosive autotrol flexcap coarse bubble air diffusers shall be spaced approximately forty eight (48) inches apart and located along one wall of the process tanks. The diffuser drop pipes shall be galvanized steel sch. 40 one inch minimum inside diameter and each assembly shall be designed and installed so as to be removable for cleaning without disturbing the operation of the plant. Each drop pipe shall be equipped with an air control valve and union for quick disassembly. 12. All valves shall be bronze/brass body full port 1/4 turn ball valves. 13. Blowers shall be enclosed in an insulated, fiberglass enclosure with positive ventilation to operate one blower at full design without overheating. Enclosure shall be manufacturers standard colors, to be selected by engineer. Enclosure shall be designed for outdoor use, and shall include UV inhibitors. F. SURFACE PREPARATION AND CORROSION PROTECTION 1. All steel surfaces shall receive a near white blast to remove rust, mill scale and weld slag. Blasting shall be accomplished indoors using steel shot to produce a mil profile for optimum adhesion of the paint. Sand blasting shall not be accepted. 2. All prepared surfaces shall be t tnroughly dry and free from preparation dust and foreign matter prior to the application of any coating,. Craftsmen applying protective coatings shall be thoroughly familiar with the application guidelines and preparation requirements of the product to be applied. All materials shall be evenly applied and shall be free from obvious defects. 11251-6 PROJECT C 4,1011 e Mattern & Craig CONSULTING ENGINEERS•SURVEYORS TYPE CONTENTS Fi,•_..cO r IJC,I.(L$ DATE COMM NO. PREL. FINAL SHEET NO. CAL. BY CKD.BY M 0aJ car :SC_tcc.4, Iv} P-e.c...4 6. PP 1.9 , L. 1•4 L. di i • L. .C.. L V L le- 2 . e. +�-< <.l 4- z> t /� /,� v t. p / ��SL* tL 1 d C'+�jC+/� lKyj / /�f .: sr.) 1L U X i. ` (fir, ) Fr i- /`{l_LD_,L v rurnr I OMNI 1.0 1. 1 LS Fr 1`41-to ri,,.4 L! Kg• et ,) b Y (� ...Q,frr �,✓ ,lLS'f=-'r9 C. != :, N't 3'� a) 1 3 v x rHH O, gz- n, L5Z Z• 3L.L O. L 5 Fr/s G .` . 1- L 0 LJi.J o 14 EXHIBIT PROJECT C-A 5 14-i s w v--p- a.41/Mattern & Craig CONSULTING ENGINEERPSUIWEYORS TYPE CONTENTS t. . DATE COMM NO. PREL. FINAL , SHEET NO. CAL. BY , -., CKD.BY )BLS T1 ..J4 B4yipi PpL ✓4o'1 re 71% L 5-v 2 SS Cv I 0 to EXHIBIT PROJECT ._ AS tc.ey 4J Mattern & Craig CONSULTING ENG N s•sURVEYORs TYPE CONTENTS r4v,-r-t o w (3, ,,.., DATE I I • , — o ! COMM NO. PREL. FINAL SHEET NO. CAL. BY Anr-1 CKD.BY XISnNL LSINSrw,-, 1 r9 01 a s n !�-.�C!••- S l> r (Dv c9 Suv-10 � 5I ��{-ti•�. 3'4/ — 34Ly'.17 1 5'5 '- to " j ( 4 3 ' - �a L -/ e9. 613' = ! i 2. L S ,ci- 3 lA- v a..e C4_ 5 C A (-4- .4-1 o-va t-1 r-tG. 4 l0CP, 41 u&S Zou, eft.w U�-rOK" C «c4, /I 5, j u r-t r P. /" z, o Z.c radii-1 1 oZs-45 - i u sod Gomel Lam, 0/4-111 77(Jk /o-S EXHIBIT Mattern & Craig 1978 PROJECT �'_yt, �, /-p TYPE CONTENTS CONSULTING ENGINEER.S•SURVEYORS DATE 10- 3 .- a/ COMM NO. PREL. FINAL - SHEET NO. CAL. BY ,Qa CKD.BY o o G. L M to o e 2 S`a r / i:'tp�c'c 44 A All Z J zs1, .^.,DES Y,3 ys \ 4/, 7 ibs/ox olzr-tC,L LOAD a<- , 3_33 1.Ls/i q lr(iST. P cm- o e 13`I /LslGitr Prt.,-po S cnn> b 'c..✓c7-13 1-, IJs /b✓oY /-�E7z, 7-7 b9st� dre C. i4cG_lk r/�-��� Z' 3" I�> c'L / 1b on (z•5) 333 16, i — S3z.r 76s Z-/z - o. oiSZ �b 1 v•L3L)(U c7�}/!1✓c Fr l� x 1.1 r, ! ! = 2.- 3 4- 3 .So .5- 5c. r-I S4t5o..a fLuAJ it i •G TiM —, t?d,Ji- AL t�E.C' JAT6• rurn1- 1 / /%1 f EXHIBIT PROJECT W-tc 5 ww� SINCE,Z17(1Mattern & Craig CONSULTING ENGINEERS•SURVEYOfS TYPE CONTENTS 13 crie. DATE COMM NO. PREL. FINAL SHEET NO. CAL. BY CKD.BY 4 LX12 ,t. Tz bto rant. g; 1i _ 1.vF-r- 0Sr i3 1 lZ EXHIBIT SINCE Mattern & Crai �Y 1978 y CONSULTING ENGINEERS • SURVEYORS J. Wayne Crag Stewart W. Hubbell Gene R. Cress Michael S. Agee Steven A. Campbell Wm. James Jones Randy W. Beckner Ms. Christie Jackson NPDES Unit North Carolina Division of Water Quality P.O. Box 29535 Raleigh, NC 27626 Dear Ms. Jackson: Wm. Thomas Austin Bradley C. Craig David P. Wilson Edwin K. Mattern, Jr. (1949-1982) Sam H. McGhee, Ili (Retired) February 21, 2000 Re: Cashiers WWTP Upgrade, Jackson County Permit # AC0063321 Comm # 1457H 3° On behalf of our client, the Tuckaseigee Water and Sewer Authority, we hereby request an amendment to the above -referenced Authorization to Construct. The enclosed project incorporates both the construction items included in the above -referenced Authorization to Construct, plus a second phase of construction. To date, none of the proposed improvements have been constructed. The following items were included in the above -referenced Authorization to Construct: the eastern secondary clarifier, the ras/was pumping station, the splitter box, and the junction box. Thank you for your assistance in this matter. Please feel free to call with any questions. Very Truly Yours, MATTERN & CRAIG, INC. cc: Jerry King C:1PROJEcTs11457H\L,ETTERS102-21.00 JACKSON.wPD Wm. James Jones, P.E Principal FEB 2 4 2000 DENR - WATER QUALITY POINT SOURCE BRANCH 12 Broad Street, Asheville, North Carolina 28801 (828) 254-2201 Fax (828) 254-4562 c1 Ire s Jotie9