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Home My WebLink AboutNC0026271_Regional Office Historical File Pre 2018 (21)c= To: Permits and Engineering Unit Water Quality Section Date: December 19, 1991 NPDES STAFF REPORT AND RECOMMENDATIONS County: Alexander Permit.No.: NCO026271 MRO No. 91-273 PART I - GENERAL INFORMATION 1. Facility and Address: Taylorsville WWTP Town of Taylorsville 204 Main Avenue, Dr., S. E. Taylorsville, North Carolina 28681 2. Date of Investigation:: December 13,'1991 3. Report Prepared by: G. T. Chen 4. Persons Contacted and Telephone Number: Mr. Brian Eades, Operator in Responsible Charge; (704) 632-5280 5. Directions to Site: From the junction of 7th Street, S. W. and West Main Avenue (Highway 16/90) in Taylorsville, Alexander County, travel south on 7th Street approximately 0.6 mile to the junction with S. R. 1108. Proceed south on S. R. 1108 approximately 0.6 mile to the junction with an unpaved road on the left (east). The wastewater treatment ,plant is located at the end of the unpaved road. 6. Discharge Point(s),,List for all.dischar.ge points: Latitude: 350 53' 02" Longitude: 81° 11' 4411 Attach a USGS map extract and indicate treatment facility site and discharge point on map. USGS Quad No.: D 14 NW USGS Quad Name: Taylorsville, NC 7. Size -(land available for expansion and upgrading): Adequate land.area available for expansion/upgrading, if necessary. 8. Topography (relationship to flood plain included): The site appears to be near a flood prone area, however, the facilities -are above 100 year flood plain. 9. Location of nearest dwelling: Approximately 1,000 feet. 10. Receiving stream or affected surface waters: Lower Little River L Page Two a. b. C. Classification: C River Basin and Subbasin No.: Catawba and 03-08-32 Describe receiving stream features and pertinent downstream uses: The receiving stream is approximately 80 feet wide with a considerable flow. The river bed appears to be a mixture of sand, mud and rocks. PART II.- DESCRIPTION OF DISCHARGE.AND TRSATMENT'W0RKS- 1. Type.of wastewater:. 100% Domestic 0% Industrial a. Volume of Wastewater: 0.43 MGD (Design Capacity) b. Types and quantities of industrial wastewater: N/A C. Prevalent toxic constituents in wastewater: N/A d. Pretreatment Program (POTWs only): N/A in development approved should be required not needed 2. Production rates (industrial discharges only) in pounds per day: N/A a. Highest month in past 12.months: lbs/day b. Highest year in the past 5 years: lbs/day 3. 'Description of industrial process (for industries -only) and applicable CFR Part and Subpart: N/A 4. Type of, treatment (specify whether proposed or existing): The existing treatment plant consists of a bar screen, flow splitter box, dual Imhoff tanks, dual dosing tanks, dual trickling filters, an aeration basin, a secondary clarifier, an aerobic digestor, sludge holding tanks, sludge drying beds and post chlorination facilities. 5. Sludge handling and disposal scheme: ..Sludge is disposed at the Alexander County landfill 6. Treatment plant classification (attach completed rating sheet): Class III (see attached rating sheet) 7. SIC Code(s): 4952 Wastewater Code(s): Primary: 01 Secondary: Main Treatment Unit Code: 40001 PART III - OTHER PERTINENT INFORMATION 1. Is this facility being constructed with Construction Grant Funds (municipals only)? N/A Page Three 2. Special monitoring requests: N/A 3. Additional effluent limits requests.: N/A 4. 1 Other: N/A 'PART IV - EVALUATION AND RECOMMATIONS The facility appeared to be properly maintained and operated, on the day of the inspection. Review -of monthly self -monitoring reports,.from November, 1990 through October, 1991 indicated that the facility has been in with final effluent limits. It is, therefore, recommended that the Permit be'renewed as requested by the applicant. Signature of Report Preparer Water Qualityikegional Supervisor Date , :Ale#andenYzi r,. Golf, )60 sty _ j160 •1 St to° ° 1 o I • nitf �v I II Ol j_ 128 •� j ,� �� `\ �'- � ,•��, ; l "� � � : •� � �� ' ter, \ . I u .J '� i•/y-� ` L� _` \.� ,� _�� f�`l III �/ - I /r +7'MacedQnia•C 'r�.cb , ; �/' ` ,, • lap Fai ground l ( r r IN c' 13 cb . )\ ; .'� •�\ ILA\\�� C/ o \ ��(�� -� to \ 340 000 FEET 1480 4811 12'30" / 1482 MrLLENE wroN /i i ml - fM%LLERSVILLEI / i 484 SCALE 1:24000 MN 1000 0 1000 2000 3000 4D00 - 5000 6000 7000 FEET GN 1 .5 0 1 KILOMETER 3• 53MILS 0.07' CONTOUR INTERVAL 20 FEET 2MILS DATUM IS MEAN SEA LEVEL 1)14-Nw idy/®�rs�//�.ula6- rirtPl4�� UTM GRID AND 1970 MAGNETIC NORTH Y,l r-5 • n "ul z Al. Ne e4-Z6.�7/ DECLINATION AT CENTER OF SHEET !J/, 04 0 ler cQu'I THIS MAP CO LIES WITH NATIONAL MAP ACCURACY STANDARDS FOR SALE BY U. S. GEOLOGICAL SURVEY, WASHINGTON, D. C. 20242 A FOLDER DESCRIBING TOPOGRAPHIC MAPS AND SYMBOLS IS AVAILABLE ON REQUEST Mailing Address:.,20 County: Afi�Xlf ey Telephone: .NPDES Permit No. NC0071 Nondisc. Per. No. IssueDate: AI%YA RT,9/ %9�oExpiration Date: / lomwkt 30 /AQ/ Existing Facility ✓ New Facility Rated By: foq , % Date: /,?— /8-41 Reviewed (Train. & Cert.) Reg. Office Reviewed (Train. & Cert.). Central Office .'a • .Q O R C /�/'iQ/1 O�PS Grade ITEM POINTS ITEM' (1) Industrial Pretreatment Units and/or. Industrial Pretreatment Program (see1delinilion No. 33) 4 (2) QFSIQIJ FLOW OF PLANT IN GPD (not applicable to non -contaminated cooling waters, sludge handling facilities for water purification plants, totally closed cycle systems (def. No..11), and facilities consisting only of Item (4) (d) or Items (4) (d) and (11) (d)) 0 20.000.......................... 1 20,001 50,000..............:........... 2 50,001 100.000.......................... 3 100,001 -• 250,000................... 4 250,001 •- 500.000.......................... 0 500,001--1,000,000.......................... 8 �1,000,001 -- 2.000,000 ........................ 10 2,000,001 (and up) - rate 1 point additional for each 200,000 god capacity up to a maximum of 30 Design Flow (gpd) 430, (On (3) PRELIMINARY UNITS (see definition no. 32) (a) Bar Screens ................................ (V or (b) Mechanical Screens, Static Screens or Comminuting Devices ........... .................. 2 (c) Grit Removal ............................... 1 or (d) Mechanical or Aerated Grit Removal ........... 2 (e) Flow Measuring Device ....................... 1 or (1) Instrumented Flow Measurement .:: . , • , (g) Preaeralion ................. . ::: : (h) Influent Flow Equalization ................... 2 (i) Grease or Oil Separators - . Gravity .......... 2 Mechanical ....... 3 Dissolved Air Flotation. 8 (j) Prechloririalion .. , , „ . ............... 5 POIN-. (4) PRIMARY -TREATMENT UNITS (a) 'Septic Tank (see definition no. 43) .............. (b) Imhoff Tank ..................... . . (c) Primary Clarifiers ............................ (d) Settling Ponds or Settling Tanks for Inorganic. Non -toxic Materials (sludge handling facilities for water purification plants, sand; gravel, stone, and other mining operations except recreational activities such as gem or gold - mining)........................................ (5) SECONDARY TREATMENT UNITS .(a) Carbonaceous Stage (i)Aeralion - High Purity Oxygen System .... . Diffused Air System ........... Mechanical Air System (fixed, floating or rotor) .............. Separate Sludge Reaeralion .... . (i i) Trickling Filler High Rate ................... Standard Rate ............... Packed Tower ............... (iii) Biological Aerated Filler or AEraled Biological Filler ...................... . (iv) Aerated Lagoons ..................... . (v) Rotating Biological Conlaclors ......... . (vi) _Sand Fillers - intermittent biological . recirculating biological . (vii) Stabilization Lagoons ................... (viii)Clar.ifier .............................. (ix) Single 5lage .system for combined carbonaceous removal of BOD and nitrogenous removal by nilrilicalion (see del. No. 12) (Points for this ilem t•.�i have to be in addition to items (5) (a) (i) through (5) (a) (viii) ....... , . , • ; , • , . (x) Nutrient additions to enhance BOD y removal ............................... (xi) Biological Culture (-Super Bugs') addition to enhance organic compound removal .... . °(b){Nitrogenous Sl /-:,: t' I •ice .. .•V . Mechani al --Ai• •�: ��;:` `+' `•'_ on aer _ c �:•..r. ud e:lrici :�. ;:r•-.. G).F Hera - � •.:�. 9. lore.=:�.�;n- nofT, -- - n^ I vale• 9� - aln 9. _ _ _ c" ar b enera, - l o'n .-:{•:_.�,,-�.-.:3 �:��,��',. - — „!: �Se ar e - C p g ea rat o'ri�' - --- .. (ii) Trickling Filter - • `,,(k)-�:-Vacuum'Fill"er - _ -1 ._. ,CPnIrifug Fil o r . ! .... _. a ;or.. ter Press or the . High Rate.. '• • ► .' , c•... , ! c'.': C., . L ... . ;1''-' •stmilar dewafaring devices. .;'. �1,:.. •; :.•.� ;y , :' ................ 10, . Standard Rale ,.. ' . .%• '' ' :, .. ,5; (8) - ' (iRclVdigg:,nfcihetaled Packed Tower ... . . ! .:. -! . - : S, 'SLL10GE-•DISPOSA ., ash) -, (a)' Lagoons, :;'- •. :- : . (iii) Biological Aalialed•—FdIe � .Aedec2 F:A .:1 , . 2 (b) Land'A�ijili>;alio� (stirface,and subsurface) ► • Biological Filler'...' •' 10 ' •...-. • • (see definition'22a) (iv) Rotating Biological Conlactors .........:. , (v) Sand 10 where the facility holds the. land app. permit '' '„ t 1 ,. .10 -Fille-t_ �. t 'inlerrnilienl biologidal':....... 2 .. L•� amPll�calion operator who holds(he land application peand recirculating biological ........ g g 3 • • .. 2 -land, application of sludge -by a contractor (vi) Clarilier............. '.�..:;�..; .:.:..... ' • 5 who does , �� ,.• no�'••hold ''(fi.e permit for the wastewater treatment (6) TERTIARY _ OR ADVANCED TREATMENT UNIT -facility where the sludge is generated ........ . i0 (c) Landfilled (burial) (a) Activated Carbons Beds -. ....... _ . (9) DISINFECTION G without carbon regeneration ............... ,.. , �• .• 5 (a) Chlorinaliop'. ! .. ��.� ;., . , , , , • with carbon regeneration ............. ... 15 (b) Decl?orlr�lion'`. �,'.''',ti ;•• (b) .:6%?; Powdered or Granular Activated Carbon Feed - , 5 (c) Ozone ....................... without carbon regeneration ................. 5 (d) Radiation ....5 with carbon regeneration ................... 15 .. (10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9) 5 (c) Air Stripping ...........................:. 5 (not applicable to chemical -additions -rated as item (d) Denilrification Process (separate process) . . . . 10 (3) 0),•(5) (2) (xi), (6) (a), (6) (b), (7) (b), (7) (e), (e) Eleclrodialysis .............................. 5 (9) (a), (9) (b), or (9) (c) 5 points each: List: • (1) . Foam Separation ............................. 5 �4 (g) Ion Exchange....... 55 �,- (h) Land Application of Treated Effluent . ' ' ' ' (see definition no. 22b) (not applicable for 5 sand, gravel, stone and other similar mining (11) MISCELLANEOUS UNITS 5 operations) on agricullurally (a) Holding Ponds, Holding Tanks or Settling Ponds managed sites (See def. for Organic or Toxic Materials including wastes :...: No.4)................................... 10 (ii) by high -rate infiltration on non-agricullurally from mining operations containing nitrogen and/or phosphorous compounds in • managed sites' includes rotary distributors ( Y * amounts significantly greater than is common for domestic wastewater ' and simi-filar fixed nozzle systems) ..... . . . . . . 4 (iii) by subsurface disposal (includes low pressure ......,,,, 4 (b) Effluent Flow Equalization (not applicable to storage basins pipe systems and gravity systems except at which are inherent in land application systems). 2 Stage Discharge (not applicable to storage basins plants consisting of septic lank and nitrifica- _.i inherent in land application systems lion lines only) .............................. .................... Microscreens 4 ............. ..................... (d) Pumps................. .. .................................. 5 (e) Stand -By Power Supply.............. = ()) Phosphorus Removal by Biological Processes ......................................... 3 (1) Thermal Pollution Conlrol Device s: (See del. No. 26) ............................. 20 ............................................. 3 Polishing Ponds - without aeration ....... 2 } with aeration .........: 5 Post Aeration - cascade 0. ,,. _ (m) diffused or mechanical ... Reverse Osmosis 5 ► •TOTAL POINTS (n) .............. Sand or Mixed -Media Fillers - low rate 5 2 _ (o) ........... high rate ..... ... .. Treatment processes for removal of metal or 5 CLASSIFICATION cyanide.................................. 15 CI I (p) Treatment processes for removal of toxic materials other than metal or cyanide ......... 15 ..r.ti n). �WDGE TREATMENT (a) -sludge Digestion Tank - Healed ............... 10 Aerobic ............... O •• Unhealed ...... :• (b)' Sludge Stabilization (chemical or thermal) . . . . . 3 5 . . (c) Sludge Drying Beds - Gravity .................. Vacuum Assisted ....... 5 arr (d):'; Sludge Elulrialion ...........•....... .............. {e)�:Sliidge: Condilioner (chemical or thermal) .... _ , 5 5 r{f.)^ Sludge'Thickerier (g�avily) .......... • , , , , , • issolved Air -Flotation Unit 5 applicable to a unit rates as (3) (i) ... g • • • , Sludge Gas Utilization (including gas storage) 2 ass .............................. 5 - 25 Points ClassII .......................... ............................ .............................. 26- 50 Points ass III ......................... 51- 65 Points ClassIV ........................................................ 66- Up Points Facilities having a rating of one through four points, inclusive, do not require a cerlilied operator. Classification of all other facilities requires a comparable grade operator in responsible charge. Facililies having an activated sludge process will be assigned a minimum classification of Class 11. Facilities.. having treatment piocesses for the removal of :metal or cyanide will be assigned a minimum classification of Class II. Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class` III.