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Home My WebLink AboutNCG590017_Compliance Evaluation Inspection_20180629 ROY COOPER Governor MICHAEL S.REGAN Secretary LINDA CULPEPPER Water Resources Interim Director • Environmental Quality June 29, 2018 Mr. Steven Drew,Director Water Resources Department City of Greensboro P.O.Box 3136 Greensboro,NC 27402-3136 RECEIVED/DENR/DWR SUBJECT: Compliance Evaluation Inspection JUL 10 2018 Lake Townsend Water Treatment Plant General Permit No.NCG590017 Water Resources Guilford County Permitting Section Dear Mr. Drew: On June 25,2018,Jenny Graznak and Kelli Park of this office met with Earl Green,Dell Harney,Larry Nance, and Ali Khan to perform a Compliance Evaluation Inspection on the permitted wastewater discharge from the Lake Townsend Water Treatment Plant(WTP).The inspection findings are detailed below and an inspection checklist is attached. 1.Permit The individual permit for this facility(NC0081671)was rescinded in July 2017 and replaced with the general permit for water treatment plants (NCG590017). Please note that the general permit requires annual Whole Effluent Toxicity testing,using an effluent concentration of 90%. 2. Self-Monitoring Program The Discharge Monitoring Reports (DMRs)were reviewed for the period of May 2017 through April 2018. It was noted that all sampling was performed per the frequencies specified in the permit. There were multiple violations during this period, which were addressed in separate correspondence from this office. A comparison of the July 2017 DMR with the facility's laboratory data for temperature, pH, total residual chlorine, turbidity, and TSS showed that these parameters were transcribed accurately. •Meritech handles the Whole Effluent Toxicity, metals, fluoride, total nitrogen, and ammonia testing for the facility. 3. Flow Measurement The permit requires continuous effluent flow recording and annual calibration of the flow measuring device. The daily effluent flow values reported on the DMRs are measured using an ultrasonic meter and rectangular weir at the discharge structure. The meter is calibrated every six months by City of Greensboro staff. The meter was last calibrated on April 6, 2018. 4. Sludge Handling and Disposal Solids were removed from the settling lagoon October 2017 through March 2018 by a private contractor(Synagro) using a portable centrifuge. This removal event caused the elevated TSS levels s""1J'catl�ir�g Compares 2r,.1._ State of North Carolina Environmental Quality 450 W.Hanes Mill Road,Suite 300,Winston-Salem,North Carolina 27105 Phone:336-776-98001 FAX:336-776-9797 • r e that led to the violations that are listed in one of the attachments. Greensboro will construct a second settling lagoon to address this recurring noncompliance issue. 5. Operations and Maintenance The Operator in Responsible Charge(ORC)for this facility is Earl Green.The facility was competently operated and maintained. No problems or concerns were noted. 6.Facility Site Review Wastewater from this plant is generated from filter backwash,which is clarified in the settling lagoon, and then discharged. The wastewater handling system consists of the following: mixing basin for dechlorination addition, settling lagoon, ultrasonic flow meter, and effluent outfall. Construction is ongoing at this facility for upgrades. 7.Effluent/Receiving Waters The system discharges into Reedy Fork,classified as WS-V;NSW waters in the Cape Fear River Basin. The effluent was observed to be clear on the day of inspection. Should you have any questions concerning this report, please contact Jenny Graznak or me at (336) 776-9800. Sincerely, Sherri V.Knight,P.E. Regional Supervisor Water Quality Regional Operations Section Division of Water Resources Attachments: Inspection Report Monitoring Report Violations fr cc: Earl Green<earl.green@greensboro-nc.gov> NPDES Unit Central Files WSRO y. United States Environmental Protection Agency Form Approved EPA Washington,D C 20460 OMB No.2040-0057 Water Compliance Inspection Report Approval expires 8-31-98 Section A National Data System Coding(i.e.,PCS) Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type 1 IN I 2 I5 I 3 NCG590017 111 12 I 18/06/25 117 18 I 19 Li 20I 21111111 1111111111111111111111111 11111111111 p6 Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved 67 I 701 Li I 71 I—I 72 I N I 731 1 174 751 1 1 1 1 1 1 180 Section B.FacilityiData l�-J� 1 Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date POTW name and NPDES permit Number) 12.00PM 18/06/25 17/07/01 Lake Townsend VVTP Exit Time/Date Permit Expiration Date 6268 Bryan Park Rd 01 30PM 18/06/25 19/07/31 Greensboro NC 27402 Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data /// Earl Clayton Green/ORC/336-383-9882/ Name,Address of Responsible Official/Title/Phone and Fax Number Contacted Lewis Walker,2503 White St Greensboro NC 27405//336-373-7662/ No Section C Areas Evaluated During Inspection(Check only those areas evaluated) ▪ Permit • Flow Measurement II Operations&Maintenance II Records/Reports ▪ Self-Monitoring Program II Sludge Handling Disposal • Facility Site Review NI Effluent/Receiving Waters Section D Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary) (See attachment summary) Name(s)and Signature(s)of Inspector(s) Agency/Office/Phone and Fax Numbers Date Jennifer Graznak c WSRO WQ//336-771-5000/ / 2-q r01/ /G0t �1 Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date &/24/12 EPA Form 3560-3(Rev 9-94)Previous editions are obsolete. Page# 1 NPDES yr/mo/day Inspection Type (Cont.) 1 31 NCG590017 111 121 18/06/25 1 17 18 LI I Section D Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary) 1. Permit The individual permit for this facility(NC0081671)was rescinded in July 2017 and replaced with the general permit for water treatment plants(NCG590017). Please note that the general permit requires annual Whole Effluent Toxicity testing, using an effluent concentration of 90%. 2. Self-Monitoring Program The Discharge Monitoring Reports (DMRs)were reviewed for the period of May 2017 through April 2018. It was noted that all sampling was performed per the frequencies specified in the permit. There were multiple violations during this period,which were addressed in separate correspondence from this office.A comparison of the July 2017 DMR with the facility's laboratory data for temperature, pH, total residual chlorine,turbidity, and TSS showed that these parameters were transcribed accurately. Meritech handles the Whole Effluent Toxicity, metals,fluoride, total nitrogen, and ammonia testing for the facility. 3. Flow Measurement The permit requires continuous effluent flow recording and annual calibration of the flow measuring device.The daily effluent flow values reported on the DMRs are measured using an ultrasonic meter and rectangular weir at the discharge structure. The meter is calibrated every six months by City of Greensboro staff. The meter was last calibrated on April 6, 2018. 4. Sludge Handling and Disposal Solids were removed from the settling lagoon October 2017 through March 2018 by a private contractor(Synagro) using a portable centrifuge. This removal event caused the elevated TSS levels that led to the violations that are listed in one of the attachments. Greensboro will construct a second settling lagoon to address this recurring noncompliance issue. 5. Operations and Maintenance The Operator in Responsible Charge (ORC) for this facility is Earl Green.The facility was competently operated and maintained. No problems or concerns were noted. 6. Facility Site Review Wastewater from this plant is generated from filter backwash,which is clarified in the settling lagoon. The wastewater handling system consists of the following. mixing basin for dichlorination addition, settling lagoon, ultrasonic flow meter, and effluent outfall. Construction is ongoing at this facility for upgrades. 7. Effluent/Receiving Waters The system discharges into Reddy Fork,classified as WS-V; NSW waters in the Cape Fear River Basin. The effluent was observed to be clear on the day of inspection. Page# 2 Permit: NCG590017 Owner-Facility: Lake Townsend WTP Inspection Date: 06/25/2018 Inspection Type: Compliance Evaluation Operations &Maintenance Yes No NA NE • Is the plant generally clean with acceptable housekeeping? • 0 0 0 Does the facility analyze process control parameters,for ex: MLSS, MCRT, Settleable • 000 Solids, pH, DO, Sludge Judge,and other that are applicable? Comment: The Operator in Responsible Charge(ORC)for this facility is Earl Green.The facility was competently operated and maintained. No problems or concerns were noted. Permit Yes No NA NE (If the present permit expires in 6 months or less). Has the permittee submitted a new 001110 application? Is the facility as described in the permit? • 0 ❑ ❑ #Are there any special conditions for the permit? 011100 Is access to the plant site restricted to the general public'? • 000 Is the inspector granted access to all areas for inspection'? • 000 Comment: Record Keeping Yes No NA NE Are records kept and maintained as required by the permit'? • ❑ ❑ ❑ Is all required information readily available, complete and current? • 000 Are all records maintained for 3 years(lab. reg. required 5 years)? • 000 Are analytical results consistent with data reported on DMRs? 1000 Is the chain-of-custody complete? U ❑ ❑ ❑ Dates,times and location of sampling Name of individual performing the sampling • Results of analysis and calibration U Dates of analysis • Name of person performing analyses U Transported COCs • Are DMRs complete.do they include all permit parameters'? U ❑ ❑ ❑ Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ U ❑ (If the facility is=or>5 MGD permitted flow) Do they operate 24/7 with'a certified operator 00 • O on each shift? Is the ORC visitation log available and current'? • 000 Is the ORC certified at grade equal to or higher than the facility classification'? U 000 Is the backup operator certified at one grade less or greater than the facility classification? • 000 Is a copy of the current NPDES permit available on site'? • 000 Page# 3 Permit: NCG590017 Owner-Facility: Lake Townsend VVTP Inspection Date: 06/25/2018 Inspection Type: Compliance Evaluation Record Keeping Yes No NA NE Facility has copy of previous year's Annual Report on file for review? 0 0 • 0 Comment: Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? • 0 0 0 Are the receiving water free of foam other than trace amounts and other debris'? • 0 0 0 If effluent (diffuser pipes are required) are they operating properly? 0 0 II ❑ Comment. Flow Measurement-Effluent Yes No NA NE #Is flow meter used for reporting? • 0 0 0 Is flow meter calibrated annually? • 0 0 0 Is the flow meter operational'? • 0 0 0 (If units are separated) Does the chart recorder match the flow meter? 0 0 • 0 Comment De-chlorination Yes No NA NE Type of system? Liquid Is the feed ratio proportional to chlorine amount(1 to 1)? 0 • 0 0 Is storage appropriate for cylinders? 0 0 I 0 #Is de-chlorination substance stored away from chlorine containers? 0 0 MI 0 Comment: Are the tablets the proper size and type? 0 0 U ❑ Are tablet de-chlorinators operational? 0 0 NI 0 Number of tubes in use? Comment. Sodium thiosulfate is added for dechlorination, and caustic is used for pH adjustment. Page# 4 h ''..i, MONITORING REPORT(MR)VIOLATIONS for: Report Date' 06/29/18 Page 1 of 2 - =•m a* :"a <"ar ,,�-�"-s, x.��"r., K�;'" ,"--�-;�,r_-, u,�K,,,,^ sE;.st �:two,"„�.,;;...s��:r:-.^,`„�:3'�e�.;-<«rm*yt�r";�'e�wse m,>�Yr;:._"�w,..ra.»«„v.."„.� ,�':�- 'W--�"y°,�rwt-.�. `x, r,.w>4” `>s., *c'.'' ', 3" .,t,P" ';`,,,,, "g a''., „sya._sh_ fir. 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Concentration Exceeded 02_2018 001 Effluent Solids,Total Suspended- 02/07/18 2 X month mg/I 45 -510 1,033.3 Daily Maximum Proceed to NOV Concentration Exceeded 02_2018 001 Effluent Solids,Total Suspended- 02/28/18 2 X month mg/I 30 274.85 816 2 Monthly Average Proceed to NOV Concentration Exceeded 10_2017 001 Effluent Turbidity 10/23/17 Monthly ntu 50 52 4 Daily Maximum Proceed to NOV Exceeded 11_2017 001 Effluent Turbidity 11/06/17 Monthly ntu 50 63.7 27.4 Daily Maximum Proceed to NOV Exceeded 02-2018 001 Effluent Turbidity 02/07/18 Monthly ntu 50 118 136 Daily Maximum Proceed to NOV Exceeded MONITORING REPORT(MR) VIOLATIONS for: Report Date: 06/29/18 Page 2 of 2 PERMIT: NCG590017 FACILITY: City of Greensboro -Lake Townsend WTP COUNTY: Guilford REGION: Winston-Salem Limit Violation MONITORING OUTFALL/ VIOLATION UNIT OF CALCULATED % VIOLATION TYPE VIOLATION ACTION REPORT PPI LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over 02 _ 2018 001 Effluent Turbidity 02/19/18 Monthly ntu 50 65.5 31 Daily Maximum Proceed to NOV Exceeded