-o dn. h+-) +r o. zri] ofi

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Alexander Randall
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1 F zri] t- 4 a rrl F *l F Fl ca h {-) op{ U c1 t*{ {-) () -o dn rf{ F{ Iq +r o h+-) The Rogerson Wastewater Treatment Facility is a secondary treatment which utilizes a conventional activated sludge process to produce a high quality effluent. lt also has the capability to utilize a Biological Nutrient Removal process to eliminate nutrients (nitrogen and phosphorus) from the effluent. The facility has a design capacity of 4.5 MGD (million gallons per day) with a peak flow of MGD. Wastewater is received at the facility via two pipes; a 24-inch force main from the downtown area and an 8-inch force main from the north side of town. The make-up of the wastewater is primarily domestic with some light industrial wastewater. The treated wastewater is permitted for discharge into the Pasquotank River. The sludge that is produced is thickened and stabilized with lime to meet Class B requirements as defined by EPA regulations then hauled to permit area in the county to be land applied. 'Ql t l,riilrt \' '.11, \.,'r. Rogerson Wastewater Treatment Rich Olson, City Manager Tefephone: ofi U Paul Fredette, Director Telephone: NC00250 l. NPDES Permit Air Quality Permit WQ , Land Application Permit Rogerson WWT Facility 450 Knobbs Creek Drive PO Box 347 Elizabeth City, NC Stephen Carver: ORC Mourice Brothers Interim Waste Treatment Plant Manager Telephone: *

The facility has a design capacity of 4.5 MGD (million gallons per day) with a peak flow of 11.25 MGD.

2 Treatment Process Performance (Effluent:) NOTE: Operating under NPDES Permit NC002501I received I February 2003 JANUARY FLOW 2.t65 MGD 4.5 MCD CBOD 6.1me/L 25 ms/l AMMONIA NITROGEN ms/l 8.0 md - TOTAL SUSPENDED RESIDUE ms/l 30 mp/l FECAL COLIFORM 4/100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 us./l 28.0 ue/l Ph 6.9(MrN)-7.9(MAX) NOT <6.8 NOR > 8.5 DO 8.68 me/l NOT< 5.0 me/l Receive Notice Of Violation and was non-compliant for effluent ammonia. Detention time was shortening due to #2 clarifier, #4 Aeration basin, and #5 out of service for repairs. FEBRUARY FLOW MGD 4.5 MGD CBOD 3.4 mgll 25 n're./l AMMONIA NITROGEN 7.95 ms/l 8.0 me/l TOTAL SUSPENDED RESIDUE 5.8l me/l 30 ms/l FECAL COLIFORM 3/100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 ue/l 28.0 us/l Ph 6.9(MrN)-7.s(MAX) NOT <6.8 NOR>8.5 DO 9.97 ms./l NOT<5.0 me/l MARCH PARAMETER AYERAGE PERMIT LIMITS FLOW 2.91tMGD 4.5 MGD CBOD 3.4 me/l 25 mc.ll AMMONIA NITROGEN 1.67 me/l 8.0 me/l TOTAL SUSPENDED RESIDUE me/l 30 mer'l FECAL COLIFORM 4/100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 us./l 28.0 usll Ph 7. r(mrn)-7.s(max) NOT<6.8 NOR > 8.5 DO 9.50 mp/l NOT<5.0 ms/l Effluent toxicity collected l0 March (PASS) APRIL FLOW MGD 4.5 MGD CBOD 3.5 ms/l 12 ms./l AMMONIA NITROGEN 5.1I ms/l 4.0 ms./l TOTAL SUSPENDED RESIDUE 5.14 ms/l 30 ms/l FECAL COLIFORM 2/100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 us/l 28.0 us./l Ph 7.0(MrN)-7.6(MAX) NOT<6.8 NOR > 8.5 DO 9.07 ms.ll NOT< 5.0 ms/l Receive Notice Of Violation and was non-compliant for effluent ammonia.

0 me/l Receive Notice Of Violation and was non-compliant for effluent ammonia. Detention time was shortening due to #2 clarifier, #4 Aeration basin, and #5 out of service for repairs. FEBRUARY FLOW 2.

3 MAY FLOW MGD 4.5 MGD CBOD 3.8 me/l l.2ms/l AMMONIA NITROGEN.25 me/l 4.0ms/L TOTAL SUSPENDED RESTDUE 9.13 ms/l 30 ms./l FECAL COLIFORM l3l100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 ue/l 28.0 usll Ph 6.8(MrN-7.3(MAX) NOT<6.8 NOR > 8.5 DO 7.88 me/l NOT < 5.0 ms/l JUNE FLOW 2.338MGD 4.5 MGD CBOD 5.0 mp/l 12 ms./l AMMONIA MTROGEN.36 me/l 4.0 ms./l TOTAL SUSPENDED RESIDUE 8.64 me/l 30 ms/l FECAL COLIFORM l31100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 ue/l 28.0 uer'l Ph 7(MIN)-7.5(MAX) NOT<6.8 NOR > 8.5 DO 8.35 mp/l NOT< 5.0 mell- Eflluent toxicity collected 16 June - (PASS) JULY FLOW 2.676IMGD 4.5 MGD CBOD 3.Sme/L 12 ms./l AMMONIA NITROGEN.45ms./L 4 mqll TOTAL SUSPENDED RESIDUE 8.8 ms/l 30 me/l FECAL COLIFORM 23 me/l 200/100 ml TOTAL RESIDUAL CHLORINE 0 uell 28.0 ue/l Ph 7.3(MrN)-7.6(MAX) NOT<6.8 NOR > 8.5 DO 8.16 ms/l NOT <5.0 ms/l AUGUST FLOW 2.446MGD 4.5 MGD CBOD 3.4 me/l 12 me/l AMMONIA NITROGEN.18 ms/l 4melL TOTAL SUSPENDED RESIDUE 6.84 ms./l 3O ms./l FECAL COLIFORM 25l100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 udl ue/i- Ph 7.3(MIN-7.8MAX) NOT<6.8 NOR > 8.5 DO 7.60 me/l NOT<5.O me/l

64 me/l 30 ms/l FECAL COLIFORM l31100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 ue/l 28.0 uer'l Ph 7(MIN)-7.5(MAX) NOT<6.8 NOR > 8.5 DO 8.35 mp/l NOT< 5.

4 SEPTEMBER FLOW MGD 4.5 MGD CBOD 3.4ms./L 12 ms./l AMMONIA NITROGEN.14 mejl 4 me/l TOTAL SUSPENDED RESIDUE 6.27 ms./l 30 mell FECAL COLIFORM 3ll100 ml 200/100 ml TOTAL RESIDUAL CHLORINE 0 ue/l 28.0 us/l Ph 7(MIN-7.7(MAX) NOT<6.8 NOR > 8.5 DO 7.73 me/l NOT< 5.0 ms/l Ellluent toxicity collected l8 September - (PASS) NOTE: Operating under NPDES Permit NC received 12 October 2008 OCTOBER FLOW 2.440MGD 4.5 MGD CBOD 3.3 ms./l 12me/L AMMONIA NITROGEN.15 me/l 4 mejl TOTAL SUSPENDED RESIDUE 6.78 ms./l 30 ms/l ENTEROCOCCI ml 35/100 mv month TOTAL RESIDUAL CHLORINE 0 ue/l 50.0 ue/l (Compliance) Ph 6.8(MrM-7.s(MAX) NOT<6.8 NOR > 8.5 DO 9.58 ms/l NOT <5.0 mp/l Non-Compliant - due to increase of monthly average (Enterococci). NOVEMBER FLOW MGD 4.5 MGD CBOD 2.6 mp/l 25 msjl AMMONIA NITROGEN.09 ms/l 8.0 me/l TOTAL SUSPENDED RESIDUE 7.69 ms/l 30 ms./l ENTEROCOCCI 2lll00ml 35/100 mvmonth TOTAL RESIDUAL CHLORINE 0 up/l 50.0 ue/l (Comoliance) Ph 7.2(MrN)-7.8(MAX) NOT<6.8 NOR >8.5 DO 9.60 mell NOT<5.0 me/l DECEMBER FLOW 2.672IN.{GD 4.5 MGD CBOD 3.1msJL 25 mp/l AMMONIA NITROGEN.l2me/L 8.0 me/l TOTAL SUSPENDED RESIDUE 6.7 ms.l 30 ms/l ENTEROCOCCI l3ll00ml 35/100 mv month TOTAL RESIDUAL CHLORINE 0 ue/l 50.0 ue/l (Compliance) Ph 7.1(MrN)-7.s(MAX) NOT<6.8 NOR>8.5 DO 10.8 me/l NOT<5.0 mp/l Effluent toxicity collected l7 Dec. - (PASS)

0 ms/l Ellluent toxicity collected l8 September - (PASS) NOTE: Operating under NPDES Permit NC 0025011 received 12 October 2008 OCTOBER FLOW 2.440MGD 4.5 MGD CBOD 3.3 ms./l 12me/L AMMONIA NITROGEN.

5 1. Notification The 2008 Annual Report was rnade available to our customers on l0 February 2009.The following methods were used. o Reports available at following locations: City Hall (City Manager's Offrce and Customer Service) Fleet Maintenance Complex (Pritchard Street) Rogerson Wastewater Treatrnent Facility 2. Certification I certifu under penalty of law that this report is complete and accurate to the best of my knowledge. I further certiry that this report has been made available to the customers of the City of ElizabethCity and that those customers have been notified of its availabilitv. PaaIA.Mefre,PE Paul A. Fredette Utilities Director City of Elizabeth City IOFeb*u.*2N9 Date

Treatrnent Facility 2. Certification I certifu under penalty of law that this report is complete and accurate to the best of my knowledge.

Wastewater Treatment Annual Performance Report 2011

Wastewater Treatment Annual Performance Report 2011 Treatment Process The Rogerson Wastewater Treatment Facility is a Secondary Treatment Facility which utilizes a Conventional Activated Sludge Process