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Home My WebLink About20180228_NC0025534_INSPEPA United States Environmental Protection Agency Washington, D.C. 20460 Water Compliance Inspection Report Form Approved. OMB No. 2040-0057 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 N 52 NC0025534 18/02/08 R S31112171819 20 21 66 Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ----------------------Reserved------------------- N67707172 73 74 75 80 Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include POTW name and NPDES permit Number) Hendersonville WWTP 80 Balfour Rd Hendersonville NC 28792 Entry Time/Date Permit Effective Date Exit Time/Date Permit Expiration Date 02:30PM 18/02/08 18/01/01 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Other Facility Data 03:45PM 18/02/08 22/12/31 Name, Address of Responsible Official/Title/Phone and Fax Number Lee Smith,PO Box 1760 Hendersonville NC 287931760//828-697-1707/Contacted No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Flow Measurement Operations & Maintenance CSO/SSO(Sewer Overflow)Facility Site Review 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 Daniel J Boss ARO WQ//828-296-4658/ Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page#1 DocuSign Envelope ID: D4A29136-36C2-4AEB-8AE7-062D7CC95E9A 2/28/2018 2/28/2018 NPDES yr/mo/day 18/02/08 Inspection Type R3111218 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) On 2/8/2018, I (Daniel Boss) conducted an inspection at the Hendersonville WWTP. I met with Kirk Miller, Tim Sexton, and Kenneth Page. The purpose of the inspection was to get a better understanding of the cause of recent sanitary sewer overflows from manhole #5096. Tim pointed out the location of the manhole during my visit to the plant. I could see the concrete riser which had cracked and caused the 58,000 gallon SSO in January 2018. The concrete riser had been removed and the manhole was sealed with a lid at ground level. The reason given for the most recent SSO on 2/7/2018 was that the manhole lid was not an exact fit for the rim, and so did not create a water-tight seal. Kirk explained that during large rain events, the influent wet well level is allowed to rise about 10-15 feet, thus backing up the collection system. Consequently, if the upstream manholes nearest to the plant are not sealed water-tight, they will leak sewage and overflow. The collection system is essentially being used as an equalization basin for the treatment plant. Kirk said that if all the incoming sewage was pumped into the plant during a storm surge it would wash out their biological sludge from the aeration basin. Kirk also confirmed that during these events, the influent parshall flume and flow meter are submerged and therefore the flow is no longer being measured accurately. ****************************************************** 2/20/18 I spoke with Garrett Demoss about the measurement of plant flow when the parshall flume is submerged. Garret said they typically use the monthly flow average to estimate the amount of flow on those days. This is not an acceptably accurate method of determining flow. The division is requiring that a totalizer be installed on the existing effluent flow meter to be used for reporting when the influent meter is submerged. If the current conditions continue, the Division will consider requiring installation of permanent measures to ensure flow measurement is continuous at the facility. NC0025534 17 (Cont.) Page#2 DocuSign Envelope ID: D4A29136-36C2-4AEB-8AE7-062D7CC95E9A Permit:NC0025534 Inspection Date:02/08/2018 Owner - Facility: Inspection Type: Hendersonville WWTP Reconnaissance Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Bar Screens Yes No NA NE Type of bar screen a.Manual b.Mechanical Are the bars adequately screening debris? Is the screen free of excessive debris? Is disposal of screening in compliance? Is the unit in good condition? Comment: Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Diffused Is the basin free of dead spots? Are surface aerators and mixers operational? Are the diffusers operational? Is the foam the proper color for the treatment process? Does the foam cover less than 25% of the basin’s surface? Is the DO level acceptable? Is the DO level acceptable?(1.0 to 3.0 mg/l) Comment: Flow Measurement - Influent Yes No NA NE # Is flow meter used for reporting? Is flow meter calibrated annually? Is the flow meter operational? (If units are separated) Does the chart recorder match the flow meter? Page#3 DocuSign Envelope ID: D4A29136-36C2-4AEB-8AE7-062D7CC95E9A Permit:NC0025534 Inspection Date:02/08/2018 Owner - Facility: Inspection Type: Hendersonville WWTP Reconnaissance Flow Measurement - Influent Yes No NA NE The influent flow meter is not operational during times of high storm flows because the influent wet well backs up and floods the parshall flume. Comment: Page#4 DocuSign Envelope ID: D4A29136-36C2-4AEB-8AE7-062D7CC95E9A