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Home My WebLink AboutNC0037834_HWA.Muddy.2022For Approval updated 04 12 2022_20220412Headworks Analysis Spreadsheet POTW Name: Mudd Date: 9/6/2022 POTW NPDES # => NCO050342 POTW Sludge Permit # => WQ0029804 POTW NPDESPermitted Flow(MGD)= 21.00 POTW Average Flow(MGD)= 15.93 UncontrollableFlow(MGD)= 14.05 2022 Muddy Creek Headworks Analysis 2020 Design BOD 195mg/I TSS 306mg/I NH3 25mg1I 7Q10 Stream Flow(MGD)= 35788 Stream Classification = WSIV Muddy Sludge Transported to Elledgefor Disposal Class of Sludge generated (A, or B) I nfluent Concentration Based on Sludge to Digestor Flow(MGD)= 0.1543 Pass Through calc. for different use Design Sludge to Disposal Flow(MGD)= Design Value POTW flows Criteria %Solids to Disposal= x 1.5 AverageFlowl Permitted Flow Loading Sludge Ste Area(acres)= WWTF Influent BOD (mg/I) 293 357.1 270.9 X SludgeSiteLife(yrs)= WWTF InfluentTSS(rg/I) 459 600.0 455.1 X Ageof SludgeSite(yrs)= WWTF Influent NH3 (mg/1) 38 190.2 144.3 X WWTF Influent Total N(mg/I) Pass -Through Loading Calculations WWTF Influent Total P (mg/I) Standard Pass-Thru Minimum NPDESLIMIT PlantRenoval Renovalrate NPDESLoading Stream Standard Stream Standard Loading Design Criteria Loading Pass-Thru Pollutant (mg/I) Rate(%) Source (lbslday) (mg/I) Source (lbsfday) Loading(lbsfday) (lbssday) Bass CBOD 25 93 DMR/LTMP 47,449 51,316 51,316 Design TSS 30 95.00 DMR/LTMP 79,714 80,389 80,389 Design Ammonia1 14 92.64 DMR/LTMP 25.272 6.655 6.655 Design Arsenic 45 Literature U.UIU WS b6.68321 56.6832 areamad Cadmium 67 Literature 0.002 Aquatic Life 18.8944 18.8944 Stream Std Chromium 82 Literature 0.050 Aquatic Life 865.9932 865.9932 Stream Std Copper 86 Literature Aquatic Life Cyanide 69 Literature 0.005 Aquatic Life 50.2835 50.2835 Stream Std Lead 61 Literature 0.025 Aquatic Life 199.8446 199.8446 Stream Std Mercury 60 Literature 0.000012 Aquatic Life 0.09353 0.09353 Stream Std Molybdenum 33 Literature jWS Nickel 42 Literature 1 0.025 1WS 1 134.37831 1 134.37831 Stream Std Selenium 50 Literature 1 0.005 JAquatic Life 1 31.17581 1 31.17581 Stream Std Silver 75 Literature 1 0.00006 lCaculator 1 0.74821 1 0.74821 Stream Std 1 2022 Muddy Creek Headworks Analysis Average Influent NIi3(mg/I) 19.7 Average Anaerobic Digester NIi3 (mg/I) 103 Inhibition Loading Calculations Pollutant Primary Removal Rate N Primary Removal Rate Source A.S./Nit,lr.F. Inhibition Concentration (mgA) A.S./Nit,/T.F. Inhibition Concentration Source A.S./Nit,lr.F. Inhibition Loading (lbsfday) Digestor Inhibition Concentration (mgA) Digestor Inhibition Conc. Source Digestor Inhibition Loading (lbsfday) Minimum Inhibition Loading (lbsfday) Minimum Inhibition Loading Source CBOD 93 DM R/LTM P TSS 95 DM R/LTM P Ammonia DMR/LTMP 480 EPA A.S. 63770.9760 1500 Literature 38115.54 38115.54 Digester Arsenic 0.1 EPA A.S. 13.2856 1.6 Literature 4.5755 4.5755 Digester Cadmium 15 Literature 1 EPA A.S. 156.3014 20 Literature 38.4138 38.4138 Digester Chromium 27 Literature 0.394 NC Nit. 71.7059 130 Literature 204.0147 71.7059 Act. Sludge Copper 22 Literature 0.48 NC Nit. 81.7577 40 Literature 59.8540 59.8540 Digester Cyanide 27 Literature 0.1 EPA A.S. 18.1995 4 Literature 7.4601 7.4601 Digester Lead 57 Literature 0.5 EPA Nit. 154.4840 340 Literature 717.26731 154.4840 Nitrification Mercury 10 Literature 0.1 EPA A.S. 14.7618 14.7618 Act. Sludge Molybdenum Nickel 14 Literature 0.25 EPA Nit. 38.6210 10 Literature 30.6396 30.6396 Nitrification Selenium Silver 20 Literature 0.25 EPA A.S. 41.5176 13 Literature 22.3056 22.3056 Digester Zinc 271 Literature 1 11 EPA A.S. 1 181.99481 4001 Literature 1 651.5757 181.9948 Nitrification 2022 Muddy Creek Headworks Analysis Sludge Loading Calculations Pollutant Sludge Ceiling Concentration Limit (mgtkg) Sludge Ceiling Load (lbsfday) Sludge Ceiling Load HASL Calc.- (lbsfday) Cumulative Sludge Rate Limit (lbsf(acre life)) Cumulative Sludge Loading (lbsfday) ClassA Limits Monthly Average Rate Limit (mg/kg) ClassA Limits Monthly Avg. Loading (lbsfday) ClassA Limits Mon.Avg.Load. - HASL Calc.- (lbsiday) Minimum Sludge Loading (lbsfday) Minimum Sludge Loading Sorce CBOD TSS Ammonia Arsenic 75 36 41 No Criteria Cadmium 85 34 39 No Criteria Chromi um Copper 4300 1338 1500 No Criteria Cyani de Lead 840 267 300 No Criteria M ercury 57 15 17 No Criteria Molybdenum 75 No Criteria Nickel 420 374 420 No Criteria Selenium 100 89 100 No Criteria Si I ver Zinc 7500 2498 2800 No Criteria 2022 Muddy Creek Headworks Analysis Maximum AI I owabl e H eadwor ks L oadi na Calculations Minimum Pass Through Loading (lbs(day) PassThrough Source Minimum Inhibition Loading (lbslday) Minimum Inhibition Loading Source Minimum Sludge Loading (lbsfday) Minimum Sludge Loading Sorce CBOD 51316.0 Design TSS 80389.3 Design Ammonia 6655 Design 38115.5409 Digester Arsenic 56.6832 Stream Std 4.5755 Digester Cadmium 18.8944 Stream Std 38.4138 Digester Chromium 865.9932 Stream Std 71.7059 Act. Sludge Copper 59.8540 Digester Cyanide 50.2835 Stream Std 7.4601 Digester Lead 199.8446 Stream Std 154.4840 Nitrification Mercury 0.09353 Stream Std 14.7618 Act. Sludge Molybdenum Nickel 134.3783 Stream Std 30.6396 Nitrification Selenium 31.1758 Stream Std Silver 0.7482 Stream Std 22.3056 Digester Zinc 103.9192 Stream Std 181.9948 Nitrification Allowable Headworks Loading (Ibsfday) Maximum Allowable Headworks Loading Source - Design 80389.3 Design 6655 Design 4.5755 Digester 18.8944 Stream Std 71.7059 Act. Sludge 59.8540 Digester 7.4601 Digester 154.4840 Nitrification 0.09353 Stream Std 30.6396 Nitrification 31.1758 Stream Std 0.7482 Stream Std 103.9192 Stream Std 2022 Muddy Creek Headworks Analysis Maximum Allowable I ndustrial Loadinas Calculations Pollutant maximum Allowable HeadworksMing (lbslday) MAHL Bass Check to Use HASL Calcs (x) Uncontrollable Concentration (mg1l) Uncontrollable Source Uncontrollable Load (Ibslday) ma�umum Allowable Industrial Load (Ibsday) CBOD 51316 Design 102 Mass Balance 11952 39364 TSS 80389 Design 233 Mass Balance 27302 53087 Ammonia 6655 Design 21 Mass Balance 2461 4195 Arsenic 4.5755 Digester 0.0032 Mass Balance 0.3750 4.2005 Cadmium 18.8944 Strearn Std 0.0007 Mass Balance 0.0820 18.8124 Chromium 71.7059 Act. Sludge 0.0014 Mass Balance 0.1640 71.5419 Copper 59.8540 Digester 0.0335 Mass Balance 3.9254 55.9286 Cyanide 7.4601 Digester 0.0026 Mass Balance 0.3047 7.1554 Lead 154.4840 Nitrification 0.0036 Mass Balance 0.4218 154.0621 Mercury 0.09353 Stream Std 0.00003 Mass Balance 0.00352 0.09001 Molybdenum 0.0011 Mass Balance 0.1289 Nickel 30.6396 Nitrification 0.0027 Mass Balance 0.3164 30.3232 Selenium 31.1758 Strearn Std 0.0049 Mass Balance 0.5742 30.6016 Silver 0.7482 Stream Std 0.001 Mass Balance 0.1172 0.6310 Zinc 103.91921 Stream Std 1 0.24871 Mass Balance 29.1419 74.7773 Design vs. Pass- Thru Warning