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Home My WebLink AboutNC0022756_Inspection_20190502EPA 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 NC0022756 19/05/01 C 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) Linville Land Harbor WWTP 20 Land Harbor Plz Newland NC 28657 Entry Time/Date Permit Effective Date Exit Time/Date Permit Expiration Date 10:20AM 19/05/01 15/02/01 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Cecil L Lewis/ORC/828-733-8300/ Other Facility Data 12:05PM 19/05/01 20/01/31 Name, Address of Responsible Official/Title/Phone and Fax Number William D Twiggs,PO Box 160 Linville NC 28646//828-733-8300/Contacted No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Operations & Maintenance Self-Monitoring Program Sludge Handling Disposal Facility Site Review 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 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: 149A5F98-B799-430F-B9C5-0E99C2CC7F0F 5/2/2019 5/2/2019 NPDES yr/mo/day 19/05/01 Inspection Type C3111218 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) On May 1, 2019 I conducted a Compliance Evaluation Inspection at the Linville Land Harbor WWTP. I met with C.L. Lewis (ORC) and Jason Brown (Backup ORC) for the inspection. Overall the plant appeared to be well maintained and operated. Inflow and Infiltration (I&I) in the collection system is a serious issue for the WWTP. According to Mr. Lewis the equalization basin overflows into the aeration basins during periods of high rainfall. The equalization basin has a capacity of 75,000 gallons. The I&I should be reduced to allow the WWTP to function better during rain events. The WWTP had 2 monthly flow violations in 2018 and had a yearly flow average of 86% of plant capacity. If there are any plans for the construction of additional sewer lines or new taps into existing sewer lines, the Asheville Regional Office would like to discuss how additional flows will be handled by the plant. The visual alarm is working for the high level float of the equalization basin, but the autodialer is not. Since the equalization basin will not overflow out of the WWTP, a working autodialer relay is not a requirement, but it is a recommendation. NC0022756 17 (Cont.) Page#2 DocuSign Envelope ID: 149A5F98-B799-430F-B9C5-0E99C2CC7F0F Permit:NC0022756 Inspection Date:05/01/2019 Owner - Facility: Inspection Type: Linville Land Harbor WWTP Compliance Evaluation 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? Settleable solids and D.O. for the aeration basins are checked about twice a month.Comment: Permit Yes No NA NE (If the present permit expires in 6 months or less). Has the permittee submitted a new application? Is the facility as described in the permit? # Are there any special conditions for the permit? Is access to the plant site restricted to the general public? Is the inspector granted access to all areas for inspection? 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? The screening channel has a high float alarm which was operating properly.Comment: Equalization Basins Yes No NA NE Is the basin aerated? Is the basin free of bypass lines or structures to the natural environment? Is the basin free of excessive grease? Are all pumps present? Are all pumps operable? Are float controls operable? Are audible and visual alarms operable? # Is basin size/volume adequate? Page#3 DocuSign Envelope ID: 149A5F98-B799-430F-B9C5-0E99C2CC7F0F Permit:NC0022756 Inspection Date:05/01/2019 Owner - Facility: Inspection Type: Linville Land Harbor WWTP Compliance Evaluation Equalization Basins Yes No NA NE The visual alarm works, but the autodialer was not triggered by the high level alarm. The basin size is 75,000 gallons. Mr. Lewis said that the basin often overflows into the aeration basins during intense rain events due to I&I issues with the collection system. Either a bigger equalization basin should be built or the I&I should be reduced. 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) Mr. Brown measured the D.O. in the basins the previous day with a result of about 2 mg/L D.O. in both basins. I tested settleablity during the inspection and the results from both basins were about 15% settleability. Comment: Secondary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater? Is the site free of excessive buildup of solids in center well of circular clarifier? Are weirs level? Is the site free of weir blockage? Is the site free of evidence of short-circuiting? Is scum removal adequate? Is the site free of excessive floating sludge? Is the drive unit operational? Is the return rate acceptable (low turbulence)? Is the overflow clear of excessive solids/pin floc? Is the sludge blanket level acceptable? (Approximately ¼ of the sidewall depth) The blankets were about 1' of 9' depth in each clarifier.Comment: Disinfection-Gas Yes No NA NE Are cylinders secured adequately? Page#4 DocuSign Envelope ID: 149A5F98-B799-430F-B9C5-0E99C2CC7F0F Permit:NC0022756 Inspection Date:05/01/2019 Owner - Facility: Inspection Type: Linville Land Harbor WWTP Compliance Evaluation Disinfection-Gas Yes No NA NE Are cylinders protected from direct sunlight? Is there adequate reserve supply of disinfectant? Is the level of chlorine residual acceptable? Is the contact chamber free of growth, or sludge buildup? Is there chlorine residual prior to de-chlorination? Does the Stationary Source have more than 2500 lbs of Chlorine (CAS No. 7782-50-5)? If yes, then is there a Risk Management Plan on site? If yes, then what is the EPA twelve digit ID Number? (1000-____-____) If yes, then when was the RMP last updated? Comment: De-chlorination Yes No NA NE Type of system ?Gas Is the feed ratio proportional to chlorine amount (1 to 1)? Is storage appropriate for cylinders? # Is de-chlorination substance stored away from chlorine containers? Comment: Are the tablets the proper size and type? Are tablet de-chlorinators operational? Number of tubes in use? Comment: Effluent Sampling Yes No NA NE Is composite sampling flow proportional? Is sample collected below all treatment units? Is proper volume collected? Is the tubing clean? # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type representative)? The effluent flow meter was calibrated on 4/29/2019.Comment: Page#5 DocuSign Envelope ID: 149A5F98-B799-430F-B9C5-0E99C2CC7F0F Permit:NC0022756 Inspection Date:05/01/2019 Owner - Facility: Inspection Type: Linville Land Harbor WWTP Compliance Evaluation Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? Are the receiving water free of foam other than trace amounts and other debris? If effluent (diffuser pipes are required) are they operating properly? Comment: Aerobic Digester Yes No NA NE Is the capacity adequate? Is the mixing adequate? Is the site free of excessive foaming in the tank? # Is the odor acceptable? # Is tankage available for properly waste sludge? Comment: Standby Power Yes No NA NE Is automatically activated standby power available? Is the generator tested by interrupting primary power source? Is the generator tested under load? Was generator tested & operational during the inspection? Do the generator(s) have adequate capacity to operate the entire wastewater site? Is there an emergency agreement with a fuel vendor for extended run on back-up power? Is the generator fuel level monitored? The generator was incidentally tested under load a few weeks ago during a power outage and it performed successfully to power the plant. The generator automatically starts on a weekly basis and runs under no load. The generator has a 275 gallon fuel tank. Comment: Page#6 DocuSign Envelope ID: 149A5F98-B799-430F-B9C5-0E99C2CC7F0F