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HomeMy WebLinkAboutNC0065684_Permit Issuance_19941114State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director Mr. Richard J. Durham P. O. Box 127 Sherrills Ford, NC 28673 Dear Mr. Durham: AT'6 loom�� [D E= F1 November 14, 1994 ,,pQ4�� Subject: Permit No. NCO065684 Mid South Water Sys. -County Wood Union County In accordance with your application for discharge permit received 6b April 6, 1994, we are forwarding herewith the subject state - NPDES permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215 .1 and the Memorandum of Agreement between North Carolina and the US Environmental Protection agency dated December 6, 1983. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, Post Office Drawer 27447, Raleigh, North Carolina 27611 -7447. Unless such demand is made, this decision shall be final and binding. Please take notice this permit is not transferable. Part II, E.4. addresses the requirements to be followed in case of change in ownership or control of this discharge. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Environmental Management or permits required by the Division of Land Resources, Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact Susan Robson at telephone number 919n33-5083. Sincerely, Original Signed By DaX'd?Asib 01fiRl`ard, Jr., P. E. cc: Mr. Jim Patrick, EPA Mooresville Regional Office P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 FAX 919-733-2496 An Equal Opportunity Affirmative Adion Employe, 5030 1wcyu.l. l; 'i u ie puolcanburner paper Permit No. NCO065684 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES DIVISION OF ENVIRONMENTAL MANAGEMENT PERMIT TO DISCHARGE WASTEWATER UNDER THE In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, Mid South Water Systems, Inc. is hereby authorized to discharge wastewater from a facility located at Country Woods East Subdivision on Hemlock Drive northwest of Bakers Union County to receiving waters designated as Goose Creek in the Yadkin -Pee Dee River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, H, and III hereof. This permit shall become effective December 1, 1994 This permit and the authorization to discharge shall expire at midnight on October 31, 1999 Signed this day November 14, 1994 Original Signed By David A. Goodrich A. Preston Howard, Jr., P.E., Director Division of Environmental Management By Authority of the Environmental Management Commission Permit No. NC0065684 SUPPLEMENT TO PERMIT COVER SHEET Mid South Water Systems, Inc. is hereby authorized to: 1. Continue to operate two existing 0.045 MGD wastewater treatment plants with each plant consisting of aeration tanks, clarifiers, tablet chlorinator, chlorine contact tank, post aeration tank, and aerated sludge holding tanks located at Country Woods East Subdivision, on Hemlock Drive, northwest of Bakers, Union County (See Part III of this Permit), and 2. upon completion of the 0.1 MGD expansion, as specified in the Authorization to Construct issued March 21, 1994, increase capacity to 0.190 MGD, and upon completion of the 0.480 MGD expansion, as specified in the Authorization to Construct issued September 30, 1994, increase capacity to 0.670 MGD, and 3. Discharge from said treatment works at the location specified on the attached map into Goose Creek which is classified Class C waters in the Yadkin -Pee Dee River Basin. A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1- October 31) Permit No. NCO065684 During the period beginning on the effective date of the permit and lasting until expiration or until expansion above 0.090 MGD, the Permittee is authorized to discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below: Effluent Characteristics Flow BOD, 5 day, 200C Total Suspended Residue NH3 as N Dissolved Oxygen ** Fecal Coliform (geometric mean) Total Residual Chlorine Temperature Total Nitrogen (NO2 + NO3 + TKN) Total Phosphorus Conductivity '4CharaeLimitations D Monitoring q Re� m uireents Measurement Sample *Sam Ike a. Weekly Avg. Daily Max Frequency Type Location 0.09 MGD Continuous Recording I or E . m 45.0 mg/l Weekly Composite E 30.0 m g/ I 45.0 m g/ 1 Weekly Composite E 2.0 m g/I Weekly Composite E 11 Weekly Grab E, U, D 200.0 /100 ml 400.0 /100 ml Weekly Grab E,U,D 2/Week Grab E Daily Grab E Quarterly Composite E Quarterly Composite E Weekly Grab U, D *Sample locations: E - Effluent, I - Influent, U - Upstream 100 fe above discharge point, D - Downstream 0.4 miles below the discharge point. **The daily average dissolved oxygen effluent concentration shall not a less than 5.0 mg/l. a The pH shall not be less than 6.0 standard units nor greater than 9.0 stand d units and shall be monitored weekly at the effluent by grab sample. There shall be no discharge of floating solids or visible foam in other than trace ounts. A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1- October 31) Permit No. NC0065684 During the period beginning on the effective date of the permit and lasting until expiration or until expansion above 0.090 MGD, the Permittee is authorized to discharge from outfall(s) serial number 001. (Continued) Effluent_ Characteristics Temperature Discharge Limitations Units (specify) Monthly Avg. Weekly Avg. Monitoring Requirements Measurement Sample, *Sample Daily Max Frequency Type Locatign Weekly Grab U,D A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permi . NCO065684 During the period beginning on the effective data of the permit and lasting until expiration or until expansion above 090 GD, the Permittee is authorized to discharge from�tfall(s) serial number 001. Such discharges shall be limited and monitored by the p ttee as specified below: Effluent Characteristics Flow BOD, 5 day, 200C Total Suspended Residue NH3 as N Dissolved Oxygen " Fecal Coliform (geometric mean) Total Residual Chlorine Temperature Total Nitrogen (NO2 + NO3 + TKN) Total Phosphorus Conductivity Discharge Limitations Monitoring Requirements Measurement Sample '_Sample N thAva. Weekly Avg. Daily Max Frequency Type Location 0.09 Continuous Recording I or E 30.0 mg/I 45.0 mg/I Weekly Composite E 30.0 mg/I 45.0 mg/I Weekly Composite E 6.0 mg/I Weekly Composite E Weekly Grab E, U, D 200.0 /100 ml 400.0 /100 ml Weekly Grab E,U,D 2/Week Grab E Daily Grab E Quarterly Composite E Quarterly Composite E Weekly Grab U, D *Sample locations: E - Effluent, I - Influent, U - Upstream 100 feet above disc\andsh - Downstream 0.4 miles below the discharge point. **The daily average dissolved oxygen effluent concentration shall not be less t The pH shall not be less than 6.0 standard units nor greater than 9.0 standard umonitored weekly at the effluent by grab sample. There shall be no discharge of floating solids or visible foam in other than trace amounts. A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NCO065684 During the period beginnin on the effective data of the permit and lasting until expiration or until expansion above 0.090 MGD, the Permittee is authorized to discharge from o�fall(s) serial number 001. (Continued) Effluent Characteristics Temperature Weekly Avg. Daily Max Monitoring Requirements Measurement Frequency Weekly C)� W C-z J5 m i 'Sample Tyne motion Grab U,D A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NCO065684 During the period beginning upon a ansion above 0.090 MGD and lasting until expiration or until expansion to 0.670 MGD, the Permittee is authorized to discharge from outfall(s) erial number 001. Such discharges shall be limited and monitored by the permittee as specified below: Effluent Characteristics Flow BOD, 5 day, 200C Total Suspended Residue NH3 as N Dissolved Oxygen Fecal Colif)rm (geometric mean) Total Resicual Chlorine Temperature Total Nitrogen (1102 + NO3 + TKN) Total Phosphorus Conductivity Aonthly A Weekly Avq 0.190 MGD 10� / 30.0_mg/1 2.0 mg/l CC J 23.0 µg/1 Daily Max 15.0 mg/1 45.0 mg/I `17 / 400.0 /100 ml Monitoring Requirements Measurement Sample 'Sample Frequency Tvpe Location Continuous Recording I or E Weekly Composite E Weekly Composite E Weekly Composite E Weekly Grab E, U. D Weekly Grab E,U,D 2/Week Grab E Daily Grab E Quarterly Composite E Quarterly Composite E Weekly Grab U, D *Sample locations: E - Effluent, I - Influent, U - Upstream 100 feet above disch\5..gA. - Downstream 0.4 miles below the discharge point. **'rhe daily average dissolved oxygen effluent concentration shall not be less tThe pH shall not be less than6.0 standard units nor greater than 9.0 standard une monitored weekly at the effluent by grab sample. There shall he no discharge of floating solids or visible foam in other than trace amounts. A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NC0065684 Dining the period beginning upon authorized to discharge from outfa Effluent Characteristics Temperature ttil expansion to 0.670 MGD, the Permittee is Monitoring RegLlirements Measurement Sample 'Sample Frequency Type Location Weekly Grab U,D A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NCO065684 During the period begin ' g upon expansion above 0.090 MGD and lasting until expiration or until expansion to 0.670 MGD, the Perntittee is authorized to discharge fro outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below: Effluent Characteristics Discharge Limitations I Monitoring Requirements Measurement Sample *Sample v WgQk y_As Daily Max Frequency _vgType Location Flow 0.19MGD BOD, 5 day, 200C 18.0m / Total Suspended Residue 30.0mg NH3asN 4.0 Dissolved Oxygen Fecal Coliform (geometric mean) 200.0 /100 ml Total Residual Chlorine 23.0 µg/I Temperature Total Nitrogen (NO2 + NO3 + TKN) Total Phosphorus Conductivity *Sample locations: E - Effluent, I - Influent, U - Upstream 100 point. **The daily average dissolved oxygen effluent concentration shall Tt.e pH shall not be less than 6.0 standard units nor greater than 9.0 sample. Continuous Recording I or E 27.0 mg/l Weekly Composite E 45.0 mg/I Weekly Composite E Weekly Composite E Weekly Grab E, U, D 400.0 /100 ml Weekly Grab E,U,D 2/Week Grab E Daily Grab E Quarterly Composite E Quarterly Composite E Weekly Grab U, D above discharge point, D - Downstream 0.4 miles below the discharge less than 5.0 mg/l. units and shall be monitored weekly at the effluent by grab There shall be no discharge of floating solids or visible foam in other than tra)T. amounts. A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NC0065684 During the period beginning upon expa ion above 0.090 MGD and lasting until expiration or until expansion to 0.670 MGD, the Permittee is authorized to discharge from outfall(s) se 'al number 001. (Continued) Effluent Characteristics Di h Limit tl n Monitoring Requirements Unit s e if Measurement m I 'Sample Monthly Avg, Weekly Avg, Daily Max Frequency Tv a Location Temperature Weekly Grab U,D A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April I - October 31) Permit No. NCO065684 During the period beginning upon expansion to 0.670 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below: Effluent Characteristics Flow BOD, 5 day, 20°C Total Suspeided Residue NH3 as N Dissolved Oxygen Fecal Coliform (geometric mean) Total Residual Chlorine Discharge Limitations Monitoring Requirements Measurement Sample_ 'Sample �nthI Weekly Avg, Daily Max Frequency Type Location 0.670 MGD Continuous Recording I or E mg/I 15.0 mg/I 3/Week Composite E 30.0 mg/I 45.0 mg/I 3/Week Composite E 2.0 mg/I ✓ 3/Week Composite E 3/Week Grab E,U,D 200.0 /100 ml 400.0 /100 ml 3/Week ✓ Grab E,U,D 19.0 49/T1 3/Week Grab E Temperature 3/Week •- Grab E,U,D Total Nitrogen (NO2 + NO3 + TKN) Quarterly Composite E Total Phosphorus n6endaefiait Quarterly +T+7Eei< Composite Graf] E tJ � �_ *Sample locations: E - Effluent, I - Influent, U - Upstream 100 feet above discharge point, D - Downstream 0.4 miles below the discharge Lpoint. Upstream and downstream monitoring is to be conducted three times per week during June, July, August, and September, and once per week during the rest of the year. **')fie daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/I. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 3/week at the effluent by grab sample. There shall be no discharge of floating solids or visible foam in other than trace amounts. M A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NCO065684 During the period beginning upon expansion to 0.670 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall(s) ser,al number 001. Such discharges shall be limited and monitored by the permittee as specified below: Effluent Characteristics Flow BOD, 5 day, 200C Total Suspended Residue NH3 as N Dissolved Oxygen .• Fecal Coliform (geometric mean) Total Residual Chlorine Temperature Total Nitrogen (NO2 + NO3 + TKN) Total Phosphorus Conductivity Discharge Limitations Monitoring Requirements Measurement Sample *Sample Monthly Avg, Weekly Avg. Daily Max Freguencv Tvge Location 0.670 MGD Continuous Recording I or E 18.0 mg/I 27.0 mg/1 3/Week Composite E 30.0 mg/I 45.0 mg/1 3/Week Composite E 4.0 mg/I 3/Week Composite E. 3/Week Grab E, U, D 200. ml 400.0 /100 ml 3/Week Grab E,U,D 19 O�rg �• 3/Week Grab E 3/Week Grab E. U, D Quarterly Composite E Quarterly Composite E 3/Week Grab U, D *Sample locations: E - Effluent, I - Influent, U - Upstream 100 feet above discharge point, D - Downstream 0.4 miles below the discharge point. Upstream and downstream monitoring is to be conducted three times per week during June, July, August, and September, and once per week during the rest of the year. **The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 3/week at the effluent by grab sample. There shall be no discharge of floating solids or visible foam in other than trace amounts. Part III Permit No. NCO065684 E. If this facility is built in phases, plans and specif ations for the next phase shall be submitted when the flow to the existing units reaches 80% of a design capacity of the facilities on line. At no time may the flow tributary to the facility exce,,6d the design capacity of the existing units. F. In the event that the wastewater t treaent facility is in substantial non-compliance for three d' consecutive months with the effluent charge conditions of this NPDES Permit, the permittee shall, upon demand of the Division, co duct a study evaluating all available wastewater disposal alternatives and the permittee shall, ithin sixty days of notification by the Division, submit a report in such form and detail as req ed by the Division evaluating these alternatives _with respect to environmental soundness and co effectiveness. NPDES WASTE LOAD ALLOCATION PERMIT NO.: NCO065684 PERMITTEE NAME: Mid South Water Systems, Inc. FACILITY NAME: Country Woods East Subdivision Facility Status: Existing Permit Status: Renewal Major Minor �1 Pipe No.: 001 Design Capacity a' .190 MGD o. (,7o Domestic (% of Flow): 100 % Industrial (% of Flow): Comments: V\k, 0 - 09 RECEIVING STREAM: Goose Creek Class: C Sub -Basin; 03-07-12 Reference USGS Quad: G16NE (please attach) County: Union Regional Office: Mooresville Regional Office Previous Exp. Date: 10/31/94 Treatment Plant Class: 11 Classification changes within three miles: No change within three miles. Requested Prepared b Reviewed -$o.Dw W alo1 Date: Date: s�45�r 7/19194 Modeler Date Rec. # I''IrNd✓ Drainage Area (mil) 9, % Avg. Streamflow (cfs): %, $ 7Q10 (cfs) Q, / Winter 7Q10 (cfs) e , 4 30Q2 (cfs) ,� , 7 Toxicity Limits: IWC 1`L % Acute/Chronic Instream Monitoring: ,. Parameters Do, lOn�/ .L Upstream . lhO uI a(fluent Downstream Location 0,I ki `t��✓ep-,�i, Av"I Monthly Average Monthly Average Monthly Average Summer Winter Summer Winter Summer Wmmr Wasreflow (MGD): 0.090 0.090 0.190 0.190 0.670 0.670 BOD5 (mg/1): 30 30 10 18 10 18 NH3N (mg/1): 2 6 2 4 2 4 DO (mg/1): 5 5 5 5 5 5 TSS (mgll): 30 30 30 30 30 30 Fecal Col. (/loo ml): 200 200 200 200 200 200 pH (SU): 6-9 6-9 6-9 6-9 6-9 Residual Chlorine W): monitor monitor 23 A k 19 19 Oil & Grease (mg/l): N/A TP (mg/1): monitor monitor monitor monitor monitor monitor TN (mg/1): monitor monitor monitor monitor monitor monitor Comments: Facility Name: NPDES No.: Type of Waste: Facility Status: Permit Status: Receiving Stream: Stream Classification: Subbasin: County: Regional Office: Requestor: Date of Request: Topo Quad: FACT SHEET FOR WASTELOAD ALLOCATION Request # MSWS Country woods East Subdivision NCO065684 Domestic - 100% Existing Renewal Goo pecies in area 030 Pnt✓any��ul 7Ety-�, N.C. DEPT. OF NATURALTENT, HEAt'I% RESOURCES SEP 1 1994 DIVISION OF ENVIRONMENTAL MANAGEMENT MOORESVILLE REGIONAL OFFICE Union Stream Characteristic: Mooresville-X4k. USGS # Susan Robson Date: 7/20/94 Drainage Area (mi2): 9.47 G16NE Summer 7Q1 0 (cfs): 0.1 Winter 7Q10 (cfs): 0.4 Average Flow (cfs): 9.5 30Q2 (cfs): 0.7 IWC (%): 91% Wasteload Allocation Summary (approach taken, correspondence with region, EPA, etc.) Facility has requested an A to C for an 0.480 mgd expansion which will give them a total design capacity of 0.670 MGD. I have included limits for 0.09 mgd, 0.190 mgd (presently being constructed) and 0.67 mgd. Instream monitoring shows no DO violations for last 2 years. Facility has violated NH3N limit at least once in last year. Highest monthly BOD5 average is 20.7 mg/l. Updated NH3N limits and added chlorine limit to new flows. Chlorine limit for 0.190 mgd due to endangered species ( Carolina heelsplitter as of 6/30/93) in area. Special Schedule Requirements and additional comments from Reviewers: Recommended by: Reviewed by Instream Assessment: Regional Supervisor: Permits & Engineerin N RETURN TO TECHNICAL SUPPORT BY: Sp e 8 1994 Existing_ Limits: Wasteflow (MGD): BOD5 (mg/1): NH3N (mg/1): DO (mg/1): TSS (mg/1): Fecal Col. 000 m* pH (SU): Residual Chlorine (µgp): Oil & Grease (mg/1): TP (mg/1): TN (mg/1): Wasteflow (MGD): BOD5 (mg/1): NH3N (mg/1): DO (mg/1): TSS (mg/l): Fecal Col. Q100 ml): pH (SU): Residual Chlorine (µg/1) Oil & Grease (mg/1): TP (mg/1): TN (mg/1): CK��\]� �L\Is•MyC�3 \11'7:w: a\vIcYYAMI Monthly Average Summer Winter 0.090 0.090 30 30 1.5 5.9 5 5 30 30 200 200 6-9 6-9 Monthly Average Summer Winter 0.190 0.190 10 18 1.3 3.8 5 5 30 30 200 200 6-9 6-9 monitor monitor monitor monitor N/A monitor monitor monitor monitor moniitor moniitor monitor monitor ,4) Monthly Average Summer Winter 0.090 0.090 30 30 2 6 5 5 30 30 200 200 6-9 6-9 monitor N/A monitor monitor monitor monitor monitor Monthly Average Summer Winter 0.670 0.670 10 18 1.1 2.4 5 5 30 30 200 200 6-9 6-9 18 18 monitor monitor monitor monitor BJ c� Monthly Average Monthly Average Summer Winter Summer Winter 0.190 0.190 0.670 0.670 10 18 10 18 2 4 2 4 5 5 5 5 30 30 30 30 200 200 200 200 6-9 6-9 6-9 19* 19* 19 19 monitor monitor monitor monitor' monitor monitor monitor moniitor ✓* Region please comment on limit to whether or not construction is considered significant (has dechlorination system been installed?) LIMIT CHANGES DUE TO: Chlorine expansions should receive a limit . 19 ug/1 is the allowable to protect against instream toxicity. Also endangered species requires Chlorine limit. NH3N current criteria is 1.0(s) and 1.8(w) limit can not be more stringent than 2(s) and 4(w) for nontrout waters. _X_ Parameter(s) are water quality limited. For some parameters, the available load capacity of the immediate receiving water will be consumed. This may affect future water quality based effluent limitations for additional dischargers within this portion of the watershed. I No parameters are water quality limited, but this discharge may affect future allocations. yes. 3 INSTREAM MONITORING REQUIREMENTS Upstream Location: — 100 ft upstream from discharge point Downstream Location: 0.4 miles Downstream from discharge point Parameters: D.O., Temp, Cond, Fecal coli Special instream monitoring locations or monitoring frequencies: MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS Has the facility demonstrated the ability to meet the proposed new limits with existing treatment facilities? Yes No If no, which parameters cannot be met? Would a "phasing in" of the new limits be appropriate? Yes No If yes, please provide a schedule (and basis for that schedule) with the regional office recommendations: H no, why not? Wasteload sent to EPA? (Major) _N (Y or N) (If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling analysis if modeled at renewal, and description of how it fits into basinwide plan) Additional Information attached? (Y or N) If yes, explain with attachments. :E)4L kL, 1 Qw= O, i rrcD AV)DOs- 30 / 30 .N*3N= I s)5.9 D-o, = sfs TSS = 30/30 PW/aov 014 SuuV WCk�j' Systems ,Znc. �Ylil1l� 1 J I a�9q GOuntkU Wvods eaSl SuIOd!ulSIOr Nc,00 (OS (a8A a3 07 /Z 1000 Domosl c. Qw _ p. 00 m(,D Db = 9,47 7010: 0.1 W7(�W=0.4 3002-=U•l OW= 9,,5 0. 2- m6D 0, 7 X)76L) lU//& /0/ /8 1,313.9 515 5�5 "iI30 34)130 -)oU/200 �U/a00 l 40 CSC: (�Sle Fur 0.045 N,;p lo/a7lek V'- 0•U95 rr/6D 31zr/99 -ror 0, l moD 7� { _4, rvu z, Fr.e ( c rt cC - Neeb' IUni/7 wr 0-01 r)6D• 0.150 m(o7, O.(� r7D r;)(,D � a•/O 0,190mo(') hUu5.2 -�UV GV, 0.40 exPOP)s1..ri_ , J.4,1(.1r:,yU U eY17i�-' egv,IJ/yrjyfJai W-p// cs jl%WV�yJPuw✓�Ov os /$/liCf�CZt/o/zg 9912,,2•� .S�o,r�ri o%lo �o��/�-P_an �rrl�nori�o� � Ul /�//.,f ��rrf 0119,;, CV'� Lo yLc� l'oo l az e ,S/is: n Fa o(�a✓ 8y. �r<X3 WoJ �Yu�oJ ?/fJ�O J-DV rI uP3 U165 Adw1 U7VPIoZew, O H.'oZr( . kl,a J,0, La.r,; rvo�,. 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Mi S trl MIv4,foIuj S CX6ej/ U.zila/?n ,� a/-4,J c /�ish/o,�/N1ri (� 1 F•,g if Fr•.a,.< G7h ,+1�-Ca J uP Glaw�� I 8,4 8,3 3/13 g.s 7 Bear Wallow Valley Mobile Home Park NCO076082 MSWS Country Woods Fast Subdivisic Goose Creek NC0065684 Residual Chlorine 7O10(CFS) DESIGN FLOW (MGD) DESIGN FLOW (CFS) STREAM STD (UG/L) UPS BACKGROUND LEVEL (UG/L) IWC (%) Allowable Concentration (ug/1) Fecal Limb Ratio of 0.1 :1 Ammonia as NH3 (summer) 0.1 7010 (CFS) 0.1 0.67 0.11 DESIGN FLOW (MGD) 0.67 1.0385 DESIGN FLOW (CFS) 1.0385 17.0 STREAM STD (MG/L) 1.0 0 UPS BACKGROUND LEVEL (MG/L) 0.22 91.2% IWC(%) 91.2% 19 7-3 Allowable Concentration (mg/1) 1 Ammonia as NH3 (winter) 7010 (CFS) 0.4 2001100ml DESIGN FLOW (MGD) 0.67 DESIGN FLOW (CFS) 1.0385 STREAM STD (MG/L) 1.8 UPS BACKGROUND LEVEL (MG/L) 0.22 IWC (%) 72.2 % Allowable Concentration (mg/1) 2 atia(94 LanbDesiffll Engineering Services, Inc. July 28, 1994 Mr. Jay Lucas Environmental Engineer N. C. Department of Environment, Health and Natural Resources Post Office Box 29535. Raleigh, North CaroNna 27626-0535 Re: Treatment Plant Expansion - Country Woods Subdivision NPDES NCO065684 Union County LDESI Project No. 83113 Dear Jay: On behalf of Carlton Tyson and myself, please accept our sincere thanks for the time you and Susan spent with us on Monday. We are awaiting your review comments and will respond quickly to allow your review to proceed. In response to our discussion regarding process design for the proposed plant expansion, I am enclosing a copy of the information provided to us by AERO-MOD for this project. This information indicates the proposed plant would produce an effluent BOD5 of 4.5 mg/l, and suspended solids of 5 mgll. The AERO-MOD video I have enclosed, we found to be helpful in visualizing some of the details related to plant construction and operation of the clarifier. Regarding the surge tank design, we discussed this question with Mr. John McNellis with AERO-MOD. He indicated that the operational basis for their surge design is such that they do not recommend the addition of air to this tank. We will obtain a letter from him with a detailed explanation of the surge operation. By copy of this letter, we are requesting a letter from MID -South asking for the permit flow reduction from 700,000 gpd to 670,000 gpd to match the ATC. 1700 East Boulevard Charlotte, NC 28203 704.376.7777 Jay Lucas July 28, 1994 Page Two Thank you again for your cooperation and response. other information you need. Very 1 r i Dale rt, . E. DCS/nk Enclosures cc: Carroll Weber Carlton Tyson Please feel free to call if you identify 11"Y SOC Prioritv Project: Yes No X If Yes, SOC#: To: Permits and Engineering Unit Water Quality Section Attention: Jay Lucas l Date: July 14, 1994 ; AUTHORIZATION TO CONS, UCT NPDES PERMIT t' REPORT AND RECOMMENDATIONS' Countv: Union p 17 Permit No. 0 6 5 6 8 4 A C D PART I - GENERAL INFORMATION �f 1. Facility and Address: Country Woods WWV� Mid South Water SAstems Post Office Box 127 Sherrills Ford. NC, 28673 2. Date of On -Site Investigation (if conducted)! N/A 3. Report Prepared by: Kim H. Colson, Environmental Engineer I 4. Persons Contacted and Telephone Number: N/A 5. Verified Discharge Point(s), List for all discharge points: Latitude: 350 07' 22" Longitude: 800 3712" Attach a USGS map extract and indicate treatment facilitY site and discharge point on map. Ensure discharge point(s) • correspond to NPDES permitted discharge points. U.S.G.S. Quad No.: G16SE U.S.G.S. Quad Name: Bakers, NC 6. Site size and expansion area consistent with application: Yes. 7. Topography (relationship to flood plain included): Flat slopes: the WWTP is not located within the 100 year flood plain. 8. Location of nearest dwelling: The nearest dwelling is located approximately 400 feet from the proposed expansion: however, there are other presently vacant building lots adjacent to the WWTP site. PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 1. Existing treatment facility a. Current permitted capacity of the facility: 0.700 MGD i Page Two b. Date(s) and construction activities allowed by previous Authorizations to Construct issued in the previous two (2) years: An Authorization to Construct was issued on March 21. 1994 for the construction of a 0.100 MGD expansion of the existing 0.090 MGD facility. co Actual treatment capacity of the current faci_l its- (design volume): 0.090 MGD (0.100 MGD expansion is currently under construction) d. Please provide a description of existing or substantially constructed wastewater treatment facilities: The existing WWT facility is two parallel package type WWTPs. The package type WWTPs consist of an aeration basin with diffused aeration, clarifier, tablet type chlorination, post aeration, manual bar screen, aerated sludge holding tank, and continuous flow measurement. The facilities under construction consist of two (2) 0.050 MGD package type WWTPs, tertiary filters, influent flow equalization, dechlorination, post aeration, and continuous flow measurement. The package type WWTPs will consist- of an aeration basin with diffused air, clarifier, aerated sludge holding tank, and chlorine disinfection. 2. Please provide a description of proposed wastewater treatment facilities: The proposed WWT facility will consist of ten (10) 48,000 gpd Aero-Mod units, chlorination, dechlorination, tertiary filters, and standby power. The Aero-Mod units consist of an aeration basin with diffused air, clarifier module, surge basin. and aerated sludge holding tank, 3. Residuals handling and utilization/disposal scheme: a. If. residuals are being land applied, please specify DEM permit no.: N/A Residual Contractor: N/A Telephone No.: N/A b. Residuals stabilization: PSRP PFRP Other c . Landfill: N/A d. Other disposal/utilization scheme (Specify): Sludge will be pumped by Liquid Waste, Inc. and taken to a CMUD WWTP. 4. Treatment plant classification (attach completed rating sheet): Class III 5. SIC Code(s): 4952 Wastewater Code(s) Primary: 05 Secondary: Page Three Main Treatment Unit Code: 06107 6. Important SOC, .10C or Compliance Schedule dates: NIA PART III - EVALUATION AND RECOMMENDATIONS The permittee, !did South Water Systems. has applied for an Authorization to Construct for the construction of a 0.480 MGD expansion of the existing WWTP. The existing WWTP is a 0.090 MGD facility that is being expanded to .190 MGD. With the addition of the 0.480 expansion, the total WWTP capacity will be 0.670 MGD. The current NPDES Permit allows for expansion up to 0.700 MGD. The plans and specifications have been reviewed and the following comments are offered: 1. The applicant should verify that the back-up generator is sufficient to run all major treatment components; 2• The plans and specifications indicate gaseous chlorine will be used: however, the calculations indicate tablet type chlorine will be used - the applicant should clarify the type of chlorination to be used; It is recommended that the Authorization to Construct. be issued once the above mentioned concerns are addressed. Of Signature of report preparer D 1&,, Water Quality Rqqional Supervisor S Date