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Home My WebLink AboutNC0020559_Pretreatment Review of Headwork Analysis_20170615Wa ter Resources ENVIRONMENTAL QUALITY June 15, 2017 Mr H Lamont Allen Director, HWRF City of Henderson P.O Box 1434 Henderson, NC 27536-1434 Subject, Pretreatment Review of Headworks Analysis (HWA) - Approved Program* City of Henderson NPDES Permit No. NCO020559 Vance County Dear Mr Allen* ROY COOPER Governor MICHAEL S. REGAN Secretary S JAY ZIMMERMAN Director The Pretreatment, Emergency Response, and Collection Systems (PERCS) Unit of the Division of Water Resources has reviewed the Headworks Analysis (HWA) for the City of Henderson. This HWA was received by the Division on March 23, 2017. The Division concurs with the HWA calculations for all pollutants of concern, with the Allocation Table corrections discussed below. These approved Maximum Allowable Headworks Loadings (MAHLs), Maximum Allowable Industrial Loadings (MAILS), and the basis for these values are found on the last page of the enclosed HWA spreadsheet The results of the HWA are also listed in the bottom section of the enclosed Allocation Table 1) HWA Corrections Please feel free to contact PERCS if you have any questions about the changes outlined below, or if you disagree with any of the changes. None of the corrections caused any over allocation that were not resolved by another correction. All corrected spreadsheets were emailed to you for your files, with the changes highlighted. Please ensure the POTW's paper and electronic HWA, AT, and other supporting documents contain these corrected documents, especially the Allocation Table. As needed, please mark any original documents as "replaced" or "voided a) Sludge Site Area: PERCS used the ratio from attachment A of Granville Farms permit (WQ0000838) for Henderson WRF (800/8,088) and total acreage from attachment B (2,054 acres) to calculate acreage permitted for Henderson WRF. 2) WRF Ammonia Design: PERCS chose to use POTW's ammonia design value of 30 mg/I from last the approved HWA to calculate ammonia design loading Nothing Compares ----,— State of North Carolina I Environmental Quality I Water Resources 512 N Salisbury Street 1 1611 Mail Service Center I Raleigh, NC 27699-1611 919 7079000 3) Next HWA Due Date The HWA approved today is primarily based on DMR/LTMP data for the period of January through December 2016. Unless conditions at the POTW change significantly and thus warrant an earlier submittal (see Comprehensive Guide, Section e), the POTW must submit an updated HWA using the site-specific data on or before April 1, 2022. Thank you for your continued cooperation with the Pretreatment Program If you have any questions or comments, please contact Monti Hassan at (919) 807-6314 [email Monti Hassan@ncdenr.gov] or Deborah Gore, Unit Supervisor at (919) 807-6383 [email Deborah Gore@ncdenr.gov] incerely, Monti Hassl Division of Water Resources MH / Henderson HWA AT 2017 Enclosures HWA AT spreadsheets cc with enclosures Darrel Johnson, Pretreatment Coordinator (email) Monti Hassan, PERCS Unit cc without enclosures Central Files Cheng Zhang, RRO Nothing Compares_ State of North Carolina I Environmental Quality I Water Resources 512 N Salisbury Street 1 1611 Mail Service Center I Raleigh. NC 27699-1611 919 7079000 Workbook Name: Henderson HWA AT 2017 Final.xis; Worksheet Name: HWA Pagel of5 Pnnted 6/15/2017, 3 33 PM Modeled after Chapter 5-HWA Guidance, Appendix 5-A Revision Date February 2008 A I B C D E I F G H I J K 1 Headworks Analysts Spreadsheet Spreadsheet Instructions 2 POTW Name Henderson WRF 1) Applicable Values should be entered in the Heavy Bordered Blue cells The rest of worksheet is 3 Date 6/15/2017 protected, password is "2" 4 POTW NPDES # => NCO020559 2) Additional pollutants can be added in cells A34 to A42 Note all Pollutant names are linked from here to other pages in HWA worksheet and also to AT worksheet (l e , automatically entered into other pages 5 POTW Sludge Permit # _> W 0000838 (Granville Farms) in HWA worksheet and also AT worksheet from HWA worksheet) 7 POTW NPDES Permitted Flow(MGD)= 414 in AT only 3) Formulas are discussed in the Comprehensive Guidance HWA Chapter 4) HWA, AT and HASL worksheets are linked MAHLs, Basis, and Uncontrollable load are automatically 8 POTW Average Flow(MGD)= 22348 < usedinHWA calculations entered Into AT from this worksheet 9 Uncontrollable Flow(MGD)= 22173 5) If red tab notes are not visible, they can be turned on in the "Tools" menu under "options", In the 10 7Q10 Stream Flow(MGD)= 013 "view" tab click the "comment indicator only" button 11 Stream Classification = C 13 Class of Sludge generated (A, or B)M37 14 Sludge to Digestor Flow(MGD)= Through calc for different POTW use Design 15 Sludge to Disposal Flow(MGD)= flows Criteria 16 %Solids to Disposal= Average Flow Permitted Flow Loading 17 Sludge Site Area(acres)= WWTF Influent BOD (mgft) 270 3922 211.7 18 Sludge Site Life(yrs)= WWTF Influent TSS (mg/1) 300 1676 0 9047 x 19 Age of Sludge Site(yrs)= WWTF Influent NH3 (m9/1) 30 1 1613 871 x 20 WWTF Influent TKN (mg/1) 35 x 21 Pass -Through Loading Calculations WWTF Influent Total P (mg/1) 7 23 5 127 x Stream Standard Pass .... Thru Minimum NPDES LIMIT Plant Removal Rate Removal rate NPDES Loading Standard Stream Standard Loading Design Criteria Loading Pass-Thru 23 Pollutant (mgt') (%) Source (lbs/day) (mg/1) Source (lbs/day) Loading (lbs/day) (lbs/day) Basis 24 BOD 6 9847 DMR 7,309 9,322 7,309 NPDES 25 TSS 30 9821 DMR 31,237 10,358 10,358 Design 26 Ammonia 3 9814 DMR & LTMP 3,006 1,036 1,036 Design 27 Arsenic 45 literature 0 05 Aquatic Life 17929 17929 Stream Std 28 Cadmium 67 literature 0 002 A uatic Life 0 1195 01195 Stream Std 29 Chromium 82 literature 005 Aquatic Life 54785 54785 Stream Std 30 Copper 9319 LTMP Data 31 Cyamde 32 Lead 61 literature 0 025 Aquatic Life 12643 12643 Stream Std 33 Mercury 9808 LTMP Data 0000012 Aquatic Life 001233 001233 Stream Std 34 Molybdenum 33 literature 35 Nickel 42 literature 0 088 Aquatic Life 29924 29924 Stream Std 36 Selenium 50 literature 0 005 Aquatic Life 0 1972 01972 Stream Std 37 Silver 75 Ilitertiture 38 Zinc 7066 LTMP Data 39 TKN 9878 LTMP Data 120847 1208 466 Design 40 Total Phos 1 9575 DMR & LTMP 43855 24169 241 693 Design 41 42 43 44 45 46 47 Modeled after Chapter 5-HWA Guidance, Appendix 5-A Revision Date February 2008 Workbook Name: Henderson HWA AT 2017 Final.xls; Worksheet Name: HWA Page2of5 Printed 6/15/2017, 3 33 PM A B C D E F G H I J K 49 50 51 Inhibition Loading Calculations Average Influent NH3 (mg/1) Average Anaerobic Digester NH3 (mg/1) only enter when have ANAEROBIC digester 52 Pollutant Primary Removal Rate (%) A S /Nit /T F A SJNat /T F Inhibition Inhibition Primary Removal Concentration Concentration Rate Source (mg/1) Source A SJNiVT F Inhibition Loading (lbs/day) Digestor Inhibition Concentration (mg/1) Digestor Inhibition Digester Inhibition Conc Source Loading (lbs/day) Minimum Minimum Inhibition Inhibition Loading Loading (lbs/day) Source 53 BOD 54 TSS 55 Amnioma 480 Act Sludge 8946 3514 8946 35 AS/Nit/TF i 56 Arsenic 0 1 Act Sludge 18638 1 8638 AS/Nit/TF i 57 Cadmium 1 Act Sludge 186382 18 6382 AS/N1t/TF iq 58 Chromium 0 394 Nitnfication 73435 7 3435 AS/Nit/TF i 59 Copper 1 393 Data 259631 259631 AS/Nit/TF 60 Cyanide 61 Lead 0 5 Nitrification 931911 93191 AS/Nit/TF li 62 Mercury 0 1 Act Sludge 186381 18638 AS/Nit/TF ir 63 Mulybdeuuiu 64 Nickel 025 Nitnfication 46596 46596 AS/Nit/TF i 65 Selenium 66 Silver 025 Act Sludge 46596 46596 AS/Nit/TF i 67 Zinc 2 554 Data 476020 476020 AS/Nit/TF iri 68 TKN 69 Total Phos 70 71 72 73 74 75 76 Modeled after Chapter 5-HWA Guidance, Appendix 5-A Revision Date February 2008 V!(.' 144 M Workbook Name: Henderson HWA AT 2017 Final.xls• Worksheet Name: HWA Printed 6/15/20Page 3 of 5 � 17, 3 33 PM A B C D E F G H I J K 77 78 Sludge Loading Calculations 79 Pollutant Sludge Ceiling Concentration Limit (mg/kg) Sludge Ceiling Load (lbs/day) Sludge Ceiling Lond - HASL Calc - (lbs/day) Cumulative Sludge Rate Limit (lbs/(acre-life)) Cumulative Sludge Loading (lbs/day) Class A Limits Monthly Average Rate Limit (mg/kg) Class A Limits Monthly Avg Loading (lbs/day) Class A Limits Mon Avg Load - HASL Calc - (lbs/day) Minimum Minimum Sludge Sludge Loading Londing (lbs/day) Sorce 80 BOD 81 TSS 82 Ammonia 83 Arsemc 75 06410 36 08900 41 0 6410 Sludge Ceilu 84 Cadmium 85 04879 34 05646 39 0 4879 Sludge Ceilu 85 Chromium 86 Copper 4300 177467 1338 15 9739 1500 15 9739 Cumul Slud 87 Cyanide 88 Lead 840 52962 267 48697 300 48697 Cumul Sltid 89 Mercury 57 02235 15 0 1702 17 0 1702 Cumul Slud 90 Mol bdenum 75 08741 08741 Sludge Ceilu 91 Nickel 420 38461 374 99071 420 3 8461 Sludge Ceilu 92 Selenium 100 07692 89 19804 100 07692 Sludge Cella 93 Silver 94 Zinc 7500 408230 2498 393316 2800 393316 Cumul Slud 95 TKN 96 Total Plies 97 98 99 100 101 102 103 104 Modeled after Chapter 5-HWA Guidance, Appendix 5-A Revision Date February 2008 Workbook Name: Henderson HWA AT 2017 Final.xls; Worksheet Name: HWA Page4of5 Printed 6/15/2017, 3 33 PM A I B I C D E F G H I J K 105 Maximum Allowable Headworks Loading Calculations 106 Mimmum Pass Through Loading (lbs/day) Pass Through Source Minimum Minimum Minimum Inhibition Landing Inhibition Loading Sludge Loading Minimum Sludge (lbs/day) Source (lbs/day) Loading Sorce Allowable Maximum Allowable Headworks Headworks Loading Loading (lbs/day) Source 107 BOD 7309 1 NPDES 7309 1 NPDES 108 TSS 103583 Design 103583 Design 109 Ammonia 10358 Design 8946 3514 AS/Nit/TF mhibitt 1035 8 Design 110 Arsenic 1 7929 Stream Std 1 8638 AS/Nit/TF inlubiti 06410 Sludge Ceiling 06410 Sludge Ceiling 111 Cadmnun 0 1195 Stream Std 186382 AS/Nit/TF mhibdi 04879 Sludge Ceiling 0 1195 Stream Std 112 Chromium 54785 Stream Std 73435 AS/Nit/TF inhibiti 54785 Stream Std 113 Copper 259631 AS/Nit1'rF uilubiti 15 9739 Cumul Sludge Loading 15 9739 Cumul Sludge Loading 114 Cyanide 115 Lead 12643 Stream Std 93191 AS/Nit/TF mhlbih 48697 Cumul Sludge Loadmg 1 2643 Stream Std 116 Mercury 001233 Stream Std 1 8638 AS/Nit/TF mlubih 0 1702 Cumul Sludge Loadmg 001233 Stream Std 117 Molybdenum 08741 Sludge Ceiling 08741 Sludge Ceiling 118 Nickel 29924 Stream Std 46596 AS/Nit/TF inlubiti 3 8461 Slud e Ceiling 29924 Stream Std 119 Selenium 0 1972 Stream Std 07692 Sludge Ceiling 0 1972 Stream Std 12U Silvei 46596 AS/Nit/TF inlubiti 4 6596 AS/Nit/TF inhibition Zinc 476020 AS/Nit/TF inlubitr 393316 Cumul Slud e Loadmg 393316 Cumul Slud e Loadin F122TKN 1208 5 Desi 1208 4660 Design Total Phos 241 7 Desiim 241 6A32 i7r,5ien Modeled after Chapter 5-HWA Guidance, Appendix 5-A Revision Date February 2008 r� Ir/ Workbook Name: Henderson HWA AT 2017 Final.xls• Worksheet Name: HWA Page5of5 � Printed 6/15/2017, 3 33 PM A B C D E F G H I J K 132 133 Maximum Allowable Industrial Loadings Calculations Design vs Pass - Thru Warning Maximum Allowable Check to Use Uncontrollable Headworks Loading HASL Cities Concentration Uncontrollable Uncontrollable Load 134 Pollutant (lbs/day) MAHL Bans (x) (mg/1) Source (lbs/day) i ammUm Allowable Industrml Load (lbs/day) 135 BOD 7309 1106 NPDES 198 Mass Balance 3661 4718 3647 6388 136 TSS 10358 2800 Design 237 Mass Balance 4382 6708 5975 6092 137 Ammonia 1035 8280 Design 209 Mass Balance 3864887 6493393 138 Arsenic 06410 Sludge Ceiling 0 005 Mass Balance 00925 05486 139 Cadmium 0 1195 Stream Std 0 003 Literature 00555 00641 140 Chromium 54785 Stream Std N/A 0 013 Mass Balance 02404 52381 141 Copper 15 9739 Cunitd Sludge Load0 052 Mass Balance 09616 150123 142 Cyanide N/A 143 Lead 12643 Stream Std 0 049 Literature 09061 03581, 144 Mercury 001233 Stream Std 00003 Literatme 000555 000678 145 Molybdenum 08741 Sludge Ceiling 0 003 Mass Balance 00555 08186 146 Nickel 29924 Stream Std 0 011 Mass Balance 02034 27890 147 Selenium 0 1972 Stream Std 0 005 Sampling 00925 0 1048 148 Silver 46596 AS/Nit/TF inhibition I N/A 0 003 Mass Balance 00555 46041 149 Zinc 393316 Cumul Sludge Loadmg 0 128 Mass Balance 23670 36 9646 150 TKN 1208 4660 Design 337 Mass Balance 623 1899 5852761 151 Total Phos 241 6932 Design 48 Mass Balance 887630 152 9302 152 153 154 155 156 157 1581 1 Modeled after Chapter 5-HWA Guidance, Appendix 5-A Revision Date February 2008 AZ/- NP Z/ NP IUP Count 1 2 3 4 5 6 7 8 9 10 Workbook Name : Henderson HWA AT 2017 Finai.xis, Worksheet Name: AT Printed 6/15/2017,3 34 PM Page 1 of 5 Allocation Table NPDES Spreadsheet Instructions Headworks last approved 06/15/17 22173 1) Applicable Values should be entered in the Heavy Bordered cells Rest of worksheet is protected, password is "2" 19227 3648 0 1200 2) Formulas are discussed in the Comprehensive Guidance, Chapter 6, Section C Allocation Table updated 06/15/17 93 8% 3) HWA and AT worksheets in this workbook are linked Pollutant Names, MAHLs, Basis, and Uncontrollable load in Permits last modified 06/01 /17 02070 this AT worksheet are automatically entered from the HWA spreadsheet This includes pollutant names in columns AT through BK Henderson WRF NC0020559 FLOW BOD Industry Type Renewal Modification Date Permit Limits Permit Limits INDUSTRY NAMES Permit Pipe of Effective Effective Permit Conc Load (please listalphabeticly) number number Industry Date Date Expires MGD al/da mg/1 lbs/da MARS PETCARE 1 0011 1 0001 1 Pet Food 04/03/17 06/01/17 1 04/03/22 1 007501 75,0001 345 001 215 80 WALMART DC 1 0016 1 0001 1 Food Storage 1 03/01/15 1 03/01/20 1 004501 45 0001 600,001 225 18 Column Totals => 0 12001 12 441 Basis=> MAHL from HWA (lbs/day) _> NPDES Permitted Flow--> 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 MAHL (lbs/da) _> NPDES NPDES 41400 7309 22173 3661 19227 3648 0 1200 441 1.8027 3207 93 8% 879% 43 5% 43 9% 02070 365 HWA AT Revised November 2005 POTW== NPDES#== IUP Count 1 2 3 4 5 6 7 8 9 10 Workbook Name : Henderson HWA AT 2017 Final.xls, Worksheet Name: AT Printed 6/15/2017,3 34 PM Page 2 of 5 Allocation Table Headworks last approved 06/15/17 Allocation Table updated 06/15/17 Permits last modified 06/01/17 Henderson WRF NCO020559 INDUSTRY NAMES (please listalphabeticly) Industry Permit number Pipe number TSS Permit Limits Cone Load mg/l lbs/da Ammonia Permit Limits Cone Load mg/1 lbs/da Arsenic Permit Limits Cone Load mg/l lbs/da Cadmium Permit Limits Cone Load m /l lbs/da Chromium Permit Limits Cone Load mg/l lbs/day MARS PETCARE 0011 0001 34000 21267 52381 438 00000 5538 WALMART DC 0016 0001 60000 225 18 95 6% 518 02739 Column Totals => 438 01 L000001 000001 00000 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 MA -111, still available (%) => 5 Percent MARL (lbs/dav) => Design Design 1035 83 38649 649 34 000 64934 1000% 627% 5179 Sludge Stream Ceiling Std 06410 0 1195 0 0925 0 0555 05486 00641 00000 00000 05486 00641 1000% 1000% 85 6 % 53 6% 00321 00060 Stream Std 10358 54785 4383 02404 5976 52381 438 00000 5538 52381 927% 1000% 53 5 % 95 6% 518 02739 HWA AT Revised November 2005 NP IUP Count 1 2 3 4 5 6 7 8 9 10 Workbook Name : Henderson HWA AT 2017 Final.xls, Worksheet Name: AT Printed 6/15/2017,3 34 PM Page 3 of 5 Allocation Table Headworks last approved 06/15/17 Allocation Table updated 06/15/17 Permits last modified 06/01/17 Henderson WRF NCO020559 INDUSTRY NAMES (please list alohabettcly) ALMART Industry Permit Pipe number number 0011 0001 0016 1 0001 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 MAHL still available (%) => 5 Percent MAHL (lbs/day) => HWA AT Revised November 2005 Copper Cyanide Lead Mercury Molybdenum Permit Limits Permit Limits Permit Limits Permit Limits Permit Limits Conc Load Cone Load Conc Load Conc Load Conc Load mg/l lbs/da mg/l lbs/da mg/l lbs/da m /l lbs/day lbs/da 007501 004691 09061 0005548 0 0555 ;060001 —0-3-00-01 0 1126 0006779 0 8186 0 1595 02 0 1595 1 000001 000001 00000001 02252 Cumul Sludge Stream Sludge Loading Std Stream Std Ceiling 15 9739 12643 0 012327 0 8741' 0 9616 09061 0005548 0 0555 15 0123 03581 0006779 0 8186 0 1595 00000 0 000000 02252 148528 0 3581 0006779 0 5935 989% 1000% 1000% 725% 930% 283% 550% 679% 07987 0 0632 0000616 00437 Workbook Name : Henderson HWA AT 2017 Finai.xis, Worksheet Name: AT Printed 6/15/2017,3 34 PM Page 4 of 5 Allocation Table Headworks last approved 06/15/17 Allocation Table updated 06/15/17 Permits last modified 06/01/17 PoTw=> Henderson WRF 4PDEs#=> NCO020559 Nickel Selenium Silver Zinc TKN Industry Permit Limits Permit Limits Permit Limits Permit Limits Permit Limits IUP INDUSTRY NAMES Permit Pipe Conc Load Conc Load Conc Load Conc Load Conc Load Count (please listalphabencly) number number mg/1 lbs/da mg/l lbs/da mg/l lbs/day mg/1 lbs/da mg/1 lbs/da 1 MARS PETCARE 0011 0001 02100 0 1314 4000 2502 2 WALMART DC 0016 0001 3 5000 13136 8000 30 02 4 5 6 7 8 9 10 Column Totals => 000001 0 0000 1 000007 1 4449 55 04 Cumul Stream Stream AS/Nit/TF Sludge Basis=> Std Std inhibition Loading Design MAHL from HWA (lbs/day) => 29924 0 1972 46596 39 3316 1208 4660 Uncontrollable Loading (lbs/day) => 02034 00925 00555 23670 623 1899 Total Allowable for Industry (MAIL) (lbs/day) => 27890 0 1048 46041 369646 58528 Total Permitted to Industry (lbs/day) => 00000 00000 00000 14449 55.04 MAIL left (lbs/day) => 27890 0 1048 46041 35 5197 53023 Percent Allow Ind (MAIL) still available (%) => 1000% 1000% 1000% 961 % 906% Percent MAHL still available (%) => 932% 53 1 % 98 8 % 903 % 43 9 5 Percent NLA -HL (lbs/day) => 0 1496 00099 02330 1 9666 6042 HWA AT Revised November 2005 POTW=- NPDES#=: IUP Count 1 2 3 4 5 6 7 8 9 10 Workbook Name : Henderson HWA AT 2017 Final.xis, Worksheet Name: AT Printed 6/15/2017,3 34 PM Page 5 of 5 Allocation Table Headworks last approved 06/15/17 Allocation Table updated 06/15/17 Permits last modified 06/01/17 Henderson WRF NCO020559 INDUSTRY NAMES (please listalphabehcly) Industry Permit number Pipe number Total Phos. Permit Limits Conc Load mg/1 lbs/da COD Permit Limits Conc Load mg/1 lbs/day Oil and Grease Permit Limits Conc Load m /l lbs/da MARS PETCARE 0011 0001 45.00 2815 6900000 4316 0 75 0000 4691 WALMART DC 0016 0001 15 00 5 63 1100 0000 412 83 75 0000 2815 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 MAIM still available (%) => 5 Percent MAHL (lbs/day) => HWA AT Revised November 2005 33 78 1 8444250 1 75 0600 Design 24169 8876 15293 33 78 119 15 779% 493 120847