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Home My WebLink AboutNC0026565_Headworks Analysis_20180208M Water Resources Environmental Quality February 8, 2018 Grant Cheek Commissioner of Water and Sewer Town of Ramseur P.O. Box 545 Ramseur, NC 27316 Subject* Review of Headworks Analysis Program- Town of Ramseur Randolph County, NPDES #* NCO026565 Dear Mr Cheek: ROY COOPER Governor MICHAEL S. BEGAN Secr etary LINDA CULPEPPER Interun Director f the sion of ter The Pretreatment, Emergency Response and ColUnit reoceived oil December 20, Resources has reviewed the Town of Ramseur's Headworks Analysis (HWA) 2017. Additional information was requested and was received from Nadine Blackwell, SUEZ on behalf of the Town of Ramseur on February 8, 2018. The Division concurs with the HWA calculations for all llutants of concern with observations Allowable Headworks Loadings (MAHLs)�and corrections discussed below. These approved Max the basis for these values are found on the last page of the HWA spreadsheet. 1) HWA Spreadsheet: ntrations were adjusted e 2018 ed uncontrollable mass balance a) Uncontrollable conce -spreadsheet submitted by Nadine Blackwell on February 8o 5 k 0 the HASL spreadsheet since it was b) The sludge concentration (thus resolved ved hwas adjusted e over tallocation issue of nickel. reported below 10 mg/kg, 2) Next HWA Due Date: The HWA approved today was based on data from May 2016 to September 2017 Unless conditions at the POTW change significantly HWA on or before October 1, 022.1 (see Comprehensive Guide),Ahe POTW must submit anupdated Thank you for your continued support of the Pretreatment Program. If you have any questions or comments, please contact Vivien Zhong at (919) 807-6310 [email: Vivien Zhong@ncdenr.gov] or Deborah Gore, Unit Supervisor at (919) 807-6383 [email: Deborah Gore@ncdenr.gov]. 0&�M Since Vivien Zhong . ^Nothing Pojnpares State of North Carolina I Environmental Quality 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 919-707-9000 Enclosure: Updated HWA spreadsheet vz/Ramseur.HWA.008 cc Nadine Blackwell, SUEZ (via email) Jim Gonsiewski, Winston-Salem Regional Office (via email) PERCS Unit (Electronic copy) Central Files Headworks Analysis Headworks Analysts Spreadsheet POTW Name Town oRa sell Revised 2/7/2018 Date POTW NPDES # => NCO026565 POTW Sludge Permit # => W00010529 48 - ed m AT only POTW NPDES Permitted Flow(MGD)= Q 123 <= used m HWA calculations POTW Average Flow(MGD) = Uncontrollable Flow(M0 112GD)= 7 1093 7Q10 Stream Flow(MGD)= Stream Classification = Class C Class of Sludge generated (A, or B)' B Sludge to Digestor Flow(MGD)= 0 000033 Sludge to Disposal Flow(MGD)= %Solids to Disposal= 1 WWTF Influent BOD (mg/I) Sludge Site Area(acres) = 3 33 WWTF Influent TSS (mg/1) Sludge Site Life(yrs) = WWTF Influent NH3 (mg") Age of Sludge Site(yrs)= WWTF Influent Total N(mg/l) x WWTF Influent Total P (mg/1) Pass -Through Loading Calculations Stream NPDES LD41T Plant Removal Removal rate NPDES Loading Standard (lbs/day) ( �) r .m Rate (° o) Source „ 36 Modeled after Chapter 5-HWA Guidance, Appendix 5-A Page 1 of 5 Printed 2/8/2018, 5 09 PM Influent Concentration Based on PassInput "x" to use Through calc for different POTW flows Design Criteria Permitted Flow Loading 153.8 x 128.1 T34 x 8.9 x m Standard) Stream Standard Design Criteria Source Loading (lbs/day) Loading (lbs/day) a 5 0 0 00018 9 1516 80 Minimum Pass- Thru Loading (lbs/day) 801 701 5 4834 0 3656 6 7548 0 9729 3 8665 0 0018 9 1516 Minimum Pass-Thru Basis Std Headworks Analysis Average Influent NH3 (mg/1) Average Anaerobic Digester NH3 (mg/1) Inhibition Loading Calculations only enter when have ANAEROBIC digester Page 2 of 5 Printed 2/8/2018, 5 09 PM Pollutant it, it, Primary Primary Inhibition Inhibition Removal Rate Removal Rate Concentration Concentration (%) Source (mg/I) Source it,Digestor Inhibition Loading (lbs/day) Inhibition Concentration (mg/1) Minimum Digestor Inhibition Digestor Inhibition Inhibition Minimum Inhibition Loading Cone Source Loading (lbs/day) Loading (lbs/day) Source BOD TSS Ammonia 480 Act sludge 4923936 49239 AS/Nit/TF inhibition Arsenic 0 1 Act sludge 0 1026 0 1026 AS/NAITF inhibition Cadmium 1 Act sludge 10258 10258 AS/Nit/TF inhibition Chromium 0 394 Nitrification 04042 04042 AS/Nit/TF inhibition Copper 048 Nitrification 04924 04924 AS/Nit/TF inhibition Cyanide 0 1 Act sludge 0 1026 0 1026 AS/Nit/TF inhibition Lead 0 5 Nitrification 05129 05129 AS/Nit/TF inhibition Mercury 0 1 Act sludge 0 1026 0 1026 AS/Nit/TF inhibition Molybdenum Not a POC Nickel 025 Nitrification 02565 02565 AS/Nit/TF inhibition Selenium Nut a FOC Silver 025 Act sludge 02565 0 2565 AS/Nit/TF inhibition Zinc 1 Act sludge 10258 10258 AS/Nit/TF inhibition Total Nitrogen Total Phos C d e f g h I Modeled after Chapter 5-HWA,Guidance, Appendix 5-A Revision Date February 2008 Zinc e Headworks Analysis Calculations u ge ei mg %.lass a a �u...o Sludge Ceiling Sludge Ceiling Load Cumulative Sludge Cumulative Monthly Class A Limits Class A Limits Mon Load - HASL Calc. - Rate Limit Sludge Loading Average Rate Monthly Avg. Avg. Load. - HASL Minimum Concentration Limit lbs/ acre*life)) (lbs/day) Limit (mg/kg) Loading (lbs/day) Calc. -(lbs/day) Loading (1 (mg/kg) (lbs/day) (lbs/day) Modeled after Chapter 5-HWA Guidance, Appendix 5-A 41 3 Page 3 of 5 Printed 2/8/2018, 5 09 PM in Sludge Loading Sorce Ceiling HASL - Cl A Mon Avg Ceiling HASL - Cl A Mon Avg - Cl A Mon Avg - CTA Mon Avg l Sludge Loading Ceiling HASL - Cl A Mon Avg- - (1.1 vg_ _Cl A Mon Avg Headworks Analysis Maximum Allowable Headworks Loading Calculations Minimum Mimmum Sludge Loading Sludge Loading (lbs/dav) Sorce 0 22231 Sludge Ceilme HASL Copper Minimum Pass Through Loading Pass Through (lbs/day) Source Minimum Minimum Inhibition Loading Inhibition Load (lbs/day) Source BOD 800 6 Design 0 5129 AS/Nit/TF mhibiti TSS 700 6 Design Molybdenum Ammonia 80 1 Design 492 3936 AS/Nit/TF mhi Arsenic 5 48341 Stream Std 0 1026 AS/Nit/TF mhi Cadmium i 0 3656 1 Stream Std 1 0258 AS/Nit/TF mhi Phrnmmm 1 F 7 5 A R Rtream Stfl n anal A.S/N t/TF mhi Minimum Mimmum Sludge Loading Sludge Loading (lbs/dav) Sorce 0 22231 Sludge Ceilme HASL Copper 0 4924 AS/Nit/TF mhibiti Cyanide 0 9729 Stream Std 0 1026 AS/Nit/TF mhibiti Lead 3 8665 Stream Std 0 5129 AS/Nit/TF mhibiti Mercury 0 00181 Stream Std 0 1026 AS/Nit/TF inhibits Molybdenum Nickel 9 1516 Stream Std 0 2565 AS/Nit/1T mhibiti 0 2770 Sludge CeilingH Selenium Silver _ 0 2565 AS/Nit/TF mhlbrtl Zinc 10258 AS/Nit/TF mhibiti Total Nitrogen Total Phos C d e f h I Modeled after Chapter 5-HWA Guidance, Appendix 5-A Revision Date February 2008 r ASL Page 4 of 5 Printed 2/8/2018, 5 09 PM Maximum Allowable Headworks Loading (lbs/day) Maximum Allowable Headworks Loading Source 800 6 Design 80 1 IDesign 0 0400 Sludge Ceiling HASL 0 3656 Stream Std 0 2223 Sludge Ceiling HASL 04924 AS(Nit/TF mhibition 1 0 5129 1AS/Nit/TF inhibition 0 001811 Stream Std Headworks Analysis Maximum Allowable Industrial LoadmEs Calculations Pollutant Allowable Headworks Loading Check to Use HASL (lbs/day) MARL Basis Cales (x) Uncontrollable Concentration Uncontrollable (mg/1) Source Maximum Uncontrollable Allowable Industrial Load (lbs/day) Load (lbs/day) BOD 8006400 Design 213 Mass Balance 1989590 601 6810 TSS 7005600 Design 165 Mass Balance 154 1232 5464368 Ammonia 800640 Design 236 Mass Balance 220443 58 0197 Arsenic 00400 Sludge Ceiling x 0 0025 Mass Balance 0 0023 00377 Cadmium 03656 Stream Std !F= 0 0005 Mass Balance 0 0005 03651 Chromium 02223 Sludge Ceiling x 0 01 Avg Influent 00093 02129 Copper 04924 AS/Nit/TF inhibition 0 0323 Mass Balance 00302 04622 Cyanide 0 1026 AS/Nit/TF mhibrti N/A 0 0049 Mass Balance 00046 00980 Lead 05129 AS/N1t/TF inhibition 0 003 Mass Balance 00028 05101 Mercury 0 00181 Stream Std 0 000001 Mass Balance 000000 000181 Molybdenum Nickel 02565 AS/Nit/TF inhibit x 00064 Mass Balance 00060 02505 Selenium Silver 02565 AS/Nit/TF inhibit N/A 00054 Mass Balance 00050 02514 Zinc 10258 AS/Nit/TF inhibition 0 1027 Mass Balance 00959 09299 Total Nitrogen Total Phos C d e f g h I Modeled after Chapter 5-HWA Guidance, Appendix 5-A Revision Date February 2008 Design vs. Pass- Thru Warning Page 5 of 5 Printed 2/8/2018, 5 09 PM Workbook Name: HWAAT_20171001 Revised 20180208.x1s, Worksheet Name: AT Allocation Table Headworks last approved 10/09/15 Allocation Table updated 12/01/15 Permits last modified r 12/01/15 POTw=>PNC�002&6`565r WDES11— NP I INDUSTRY NAMES Count (,ice list alphabencir) 1 Matlab 2 3 4 5 6 7 8 9 10 Industry Type Renewal Modification Date Permit Pipe of Effective Effective Permit number number Industry Date Date Expire: Column Totals => Basis=> MARL from HWA (lbs/day) => Uncontrollable Loading (lbs/day) => Total Allowable for Industry (MAIL) (lbs/day) => Total Permitted to Industry (lbs/day) => MAIL left (lbs/day) => Percent Allow Ind (MAIL) still available (%) => Percent MARL still available (%) => 5 Percent MARL. (lbs/day) => HWA AT Revised November 2005 MGD Printed 2/8/2018, 5 11 PM Page 1 of 4 Permit Limits I Permit Limits Conc Load Conc Load 0 0250 1 25,0001 1 NPDES Design Design NPDES Permitted Flo—> 0 4800 8011 199 701 154 0 1120 602 0 3680 0 0250 0 602 0 3430 00 3 1000% 4780OX 715% 752% 0024040 POND=: NPDES#= NP Count 1 2 3 4 5 6 7 8 9 10 Workbook Name: HWAAT_20171001 Revised 20180208.xis, Worksheet Name: AT Allocation Table Industry Permit number Headworks last approved 10/09/15 Allocation Table updated 12/01/15 Permits last modified 12/01/15 Printed 2/8/2018, 5 11 PM Page 2 of 4 Town of Ramseur NCO026565 INDUSTRY NAMES (pieaseistaiPnabebeiy) Industry Permit number Ammonia Permit Limits Pipe Cone Load number mg/1 lbs/day Arsenic Permit Limits Cone Load mg/1 lbs/day Cadmium Permit Limits Cone Load mg/1 lbs/day Chromium Permit Limits Cone Load mg/1 lbs/day Copper Permit Limits Cone Load mg/1 lbs/day Cyanide Permit Limits Cone Load mg/1 lbs/day Matlab 0002 001 00700 00146 0 5000 0 1043 20700 04316 0 1000 00209 AS/NUTF AS/NitfrF Design HASL Stream Std HASL inhibition inhibition 8006 00400 03656 02223 04924 0 1026 2204 00023 00005 00093 00302 00046 5802 00377 03651 02129 T4 00980 000 00000 00146 0 1043 T4-5-1-6- 00209 5802 00377 03505 0 1087 00306 00772 1000% 1000% 960% 510% 66% 787% 725% 942% 959% 489% 62% 752% 400 00020 00183 0 0111 00246 00051 uoiumn i otais => Basis— MAHL from HWA (lbs/day) => Uncontrollable Loading (lbs/dav) _> Total Allowable for Industry (MAIL) (lbs/day) => Total Permitted to Industry (lbs/day) => MAIL left (lbs/day) => Percent Allow Ind (MAIL) still available (%) => Percent MAHL still available (%) => 5 Percent MARL Obs/day) => HWA AT Revised November 2005 I UI I u UUVUI I U U1401 1 U 1U4.5] 1 U 4-1IoI U uzuy) Sludge Sludge Ceding Ceiling AS/NUTF AS/NitfrF Design HASL Stream Std HASL inhibition inhibition 8006 00400 03656 02223 04924 0 1026 2204 00023 00005 00093 00302 00046 5802 00377 03651 02129 T4 00980 000 00000 00146 0 1043 T4-5-1-6- 00209 5802 00377 03505 0 1087 00306 00772 1000% 1000% 960% 510% 66% 787% 725% 942% 959% 489% 62% 752% 400 00020 00183 0 0111 00246 00051 11 Revised 20180208.x1s, Worksheet Name: AT Workbook Name: HWAAT_20171001 Allocation Table Headworks last approved 10/09/15 Allocation Table updated 5 12/01/1 Permits last modified 12/01/15 Printed 2/8/2018, 5 11 PM Page 3 of 4 _- — AS/Nlt/TFinhibition Stream Std Not a POC r+airvm I Not A POC inhibition 0 2565 Basis=> inhibition 0 5129 0 001810 0 2565 0 0060 0 0050 MAHL from HWA (lbs/day) _> 0 0028 0 000001 0 2505 0 2514 Uncontrollable Loading (lbs/day) _> 0 5101 00018091 0 2085 0 0000 0 050C lbs/da > Total Allowable for Industry (MAIL) ( y) = 0 0417 0 000000 0 0000 0 2011 Total Permitted to Industry (lbs/day) _> 0 001809 0 0420 #######80 1 °iMAIL left (lbs/day) _> 100 0 % ####### 16 8 ####### 78 5 °/Percent Allow Ind (MAIL) still available (%) _> 00468184 999% #######Percent 16 4 % MARL still available (%) _> 0 0128 0012 5 Percent MAHL (lbs/day) _> 0 000090 HWA AT Revised November 2005 POTW=; NPDES#= fiJP Count 1 2 3 4 5 6 7 8 9 10 Workbook Name: HWAAT_20171001 Revised 20180208.xis, Worksheet Name: AT Allocation Table Headworks last approved 10/09/15 Allocation Table updated 12/01/15 Permits last modified 1 12/01/15 Town of Ramseur I U UUI I U UUl I U 44411 1 iFir7FiF7F7F7f 1 AS/NiUTF NCO026565 INDUSTRY NAMES (pi— Int Jphbeftdy) Industry Permit number Zinc Permit Limits Pipe Cone Load number mg/I lbs/da Total Nitrogen Permit Limits Cone Load mg/1 lbs/day Total Phos. Permit Limits Cone Load mg/I lbs/day TTO Oil/Grease Permit Limits Permit Limits Cone Load Cone Load mg/1 lbs/day mg/1 lbs/day Matlab 0002 001 14800 03086 2 1300 0 4441 Monitor ####### 00959 09299 03086 000 000 04441 ####### 06213 668% ####### ####### ####### ####### 606%1####### ####### ####### ####### 00513 Column Totals => Basis=> MAHL from HWA (lbs/day) => Uncontrollable Loading (lbs/day) => Total Allowable for Industry (MAIL) (lbs/day) => Total Permitted to Industry (lbs/day) => MAIL left (lbs/day) => Percent Allow Ind (MAIL) still available (%) => Percent MAHL still available (%) => 5 Percent MARL fibs/dav) => HWA AT Revised November 2005 I U iuzso I U UUI I U UUl I U 44411 1 iFir7FiF7F7F7f 1 AS/NiUTF inhibition 10258 00959 09299 03086 000 000 04441 ####### 06213 668% ####### ####### ####### ####### 606%1####### ####### ####### ####### 00513 Printed 2/8/2018, 5 11 PM Page 4 of 4 Headworks Addendum for Sludge Loadings (HASL) worksheet POTW Name => Town of Ramseur Enter actual POTW NPDES # => NCO026565 39 POTW Sludge Permit # => W00010528 POTW Influent Date=> 10/1/2017 H WA) POTW Average Flow => 012 mgd Avg sludge flow to Disposal => 0000033 mgd Average % Solids to Disposal => 1 00 Sludge Site Area permitted => 33 acres IF Greater than 80% Flag POTW MUST SUBMIT LAND APP & METALS MANAGEMENT PLANn/a Page 1 of 1 Printed 2/8/2018, 5 12 PM MAHL_sv = (Q_potw * C_inf * 8 34) / ( Q_potw = Average POTW flow (mgd) C_inf = Average influent concentration (mgd) %_ad1 = Per percentage of Sludge Limit as decimal (example enter 117% as 1 17) 8 34 = Conversion Factor Sludge Ceding Concentrations Limits mg/dry kg Enter actual MAXIMUM SLUDGE CONC from most recent Sludge Report or LTMP Data mg/dry k Enter actual Flag if > 80% of Applicable Ceiling Cone Limit Flag Flag if > 100% of the Limit Flag 39 CUMULATIVE 64 0 o POTW Influent (insert these values into LOADING data H WA) m /I lbs/day from most recent Flag if 6 000 CUMULATIVE Sludge Report for %of Greater SLUDGE the most heavily Cumulative than POLLUTANT LOADING LIMITS loaded field' Limit 80% 0 005 lbs /acre lbs /acre #VALUE! Arsenic 36 If over ceiling cone Cadmium 34 MAHL n/a Chromium 5 000 19 'o Copper 1338 Lead 267 Mercury 15 Molybdenum Nickel 374 Selenium 89 Zinc 24111 1 IF Greater than 80% Flag POTW MUST SUBMIT LAND APP & METALS MANAGEMENT PLANn/a Page 1 of 1 Printed 2/8/2018, 5 12 PM MAHL_sv = (Q_potw * C_inf * 8 34) / ( Q_potw = Average POTW flow (mgd) C_inf = Average influent concentration (mgd) %_ad1 = Per percentage of Sludge Limit as decimal (example enter 117% as 1 17) 8 34 = Conversion Factor Sludge Ceding Concentrations Limits mg/dry kg Enter actual MAXIMUM SLUDGE CONC from most recent Sludge Report or LTMP Data mg/dry k % of Applicable Ceiling Cone Limit % Flag if > 80% of Applicable Ceiling Cone Limit Flag Flag if > 100% of the Limit Flag 39 2 500 64 0 o POTW Influent (insert these values into Cone H WA) m /I lbs/day 00025 260 6 000 23 o o 0 005 02223 #VALUE! #VALUE! #VALUE! #VALUE! 0 005 02770 #VALUE! #VALUE! If over ceiling cone POTW must reduce MAHL n/a 270 5 000 19 'o If Greater than 80% of the concentration limit POTW MUST SUBMIT METALS MANAGEMENT PLAN n/a ' The most heavily loaded field is determined for each polluntant indivisually, and is the field that contains the highest amount (lbs/acre) of that polluntant Calculate MAHL_sv based on % of Monthly Average Concentration Limits to Enter Average Protect Sludge Quality POTW Influent (insert these values into Cone H WA) m /I lbs/day 00025 00400 #VALUE' 0 005 02223 #VALUE! #VALUE! #VALUE! #VALUE! 0 005 02770 #VALUE! #VALUE! If over ceiling cone POTW must reduce MAHL n/a ' The most heavily loaded field is determined for each polluntant indivisually, and is the field that contains the highest amount (lbs/acre) of that polluntant