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Home My WebLink AboutNC0023736_Compliance Evaluation Inspection_20191220DocuSign Envelope ID: 4227725B-54ED-46FA-BE03-9ADE9CA8C36E ROY COOPER - a (itrr•crrl[u .. K41CHAEL S. REGAN �`. •*.0 � LINDA CULPEPPER NORTH CARODNA awtor Environmental Quality December 20, 2019 Lisa Triplett City of Lenoir PO Box 958 Lenoir, NC 28645-0958 SUBJECT: Compliance Inspection Report Gunpowder Creek WWTP NPDES WW Permit No. NCO023736 Caldwell County Dear Permittee: The North Carolina Division of Water Resources conducted an inspection of the Gunpowder Creek WWTP on 12/18/2019. This inspection was conducted to verify that the facility is operating in compliance with the conditions and limitations specified in NPDES WW Permit No. NC0023736. The findings and comments noted during this inspection are provided in the enclosed copy of the inspection report entitled "Compliance Inspection Report". There were no significant issues or findings noted during the inspection and therefore, a response to this inspection report is not required. If you should have any questions, please do not hesitate to contact me with the Water Quality Regional Operations Section in the Asheville Regional Office at 828-296-4500 or via email at tim.heim@ncdenr.gov. Sincerely, [DocuSigned by: l�t,iw> 082111105AICA418_. Tim Heim, P.E., Environmental Engineer Water Quality Regional Operations Section Asheville Regional Office Division of Water Resources, NCDEQ ATTACHMENTS Ec: WQS-ARO Server LF G:\WR\WQ\Caldwell\Wastewater\Municipal\Gunpowder Creek 23736\Inspections\2019 CEI\20191220_NC0023736_CEI.Docx North CarotnsDepart rnentafEnvironmentalQvali[y I OiAsionofWater Resources .shevdle Regonal Office 1 2090 V.S. 70 ftg ay I Sw nanos. North Carolnla 23773 nb.«..c.« 32S-96A500 DocuSign Envelope ID: 4227725B-54ED-46FA-BE03-9ADE9CA8C36E 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 IF I 3 I NC0023736 111 12 I 19/12/18 I17 18 I S J 19 L G] 201 I 211111 I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I II I I I I I f6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 671 70 I I 71 I I 72 I r I 73 I I 174 751 I I I I I I I80 u I� I I i Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include Entry Time/Date Permit Effective Date POTW name and NPDES oermit Number) 10:OOAM 19/12/18 14/07/01 Gunpowder Creek WWTP 450 Pine Mtn Rd Exit Time/Date Permit Expiration Date Hudson NC 28638 02:OOPM 19/12/18 19/03/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Elisa Robbins Triplett/ORC/828-757-2198/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Monte L Wall,PO Box 958 Lenoir NC 286450958//828-757-2198/ Yes Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenance Records/Reports Self -Monitoring Program 0 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 o... Sig-d by: 12 z o 2 019 Timothy H Heim RumDWR/ARO WQ/828-296-4665/E�-6fI Mika) Willmer DWR/Division of Water Quality/828-296-4686/ 82e„o5A8CA4,8_ Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date Cosigoea bv: po�� 12/20/2019 ]E61]A38285848C.. EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# DocuSign Envelope ID: 4227725B-54ED-46FA-BE03-9ADE9CA8C36E NPDES yr/mo/day Inspection Type (Cont.) NCO023736 I11 12, 19/12/18 117 18 JCJ Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Tim Heim and Mikal Willmer of the Asheville Regional Office performed a routine Compliance Evaluation Inspection of the facility on December 18, 2019. Lisa Triplett and Donnie Hawkins (City of Lenoir) were present and assisted with the inspection. The facility appeared well maintained and operated at the time of the inspection. The following items were noted during the inspection: The facility may wish to evaluate the use of liquid hypochlorite as an option during future plant upgrades. Elimination of the chlorine gas cylinders may reduce operator risk and EPA Tier 2 Notification requirements Page# DocuSign Envelope ID: 4227725B-54ED-46FA-BE03-9ADE9CA8C36E Permit: NCO023736 Owner - Facility: Gunpowder Creek WWTP Inspection Date: 12/18/2019 Inspection Type: Compliance Evaluation Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? 0 ❑ ❑ ❑ Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: pH, DO, Temp. Permit Yes No NA NE (If the present permit expires in 6 months or less). Has the permittee submitted a new 0 ❑ ❑ ❑ application? Is the facility as described in the permit? 0 ❑ ❑ ❑ # Are there any special conditions for the permit? ❑ 0 ❑ ❑ Is access to the plant site restricted to the general public? 0 ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? 0 ❑ ❑ ❑ Comment: The facility appeared well maintained at the time of the inspection. Bar Screens Yes No NA NE Type of bar screen a.Manual ❑ b.Mechanical Are the bars adequately screening debris? 0 ❑ ❑ ❑ Is the screen free of excessive debris? 0 ❑ ❑ ❑ Is disposal of screening in compliance? 0 ❑ ❑ ❑ Is the unit in good condition? 0 ❑ ❑ ❑ Comment: Grit Removal Yes No NA NE Type of grit removal a.Manual ❑ b.Mechanical Is the grit free of excessive organic matter? ❑ ❑ ❑ Is the grit free of excessive odor? 0 ❑ ❑ ❑ # Is disposal of grit in compliance? 0 ❑ ❑ ❑ Comment: Page# 3 DocuSign Envelope ID: 4227725B-54ED-46FA-BE03-9ADE9CA8C36E Permit: NCO023736 Owner - Facility: Gunpowder Creek WWTP Inspection Date: 12/18/2019 Inspection Type: Compliance Evaluation Sequencing Batch Reactors Yes No NA NE Type of operation: Simplex, Multiple Is the reactor effluent free of solids? ❑ ❑ ❑ Does minimum fill time correspond to the peak hour flow rate of the facility? ❑ ❑ ❑ Is aeration and mixing cycled on and off during fill? ❑ ❑ ❑ The operator understands and can explain the process? 0 ❑ ❑ ❑ Comment: The facility currently operates 3 SBR trains in parallel. Two of the trains include a small and medium reactor vessel operated concurrently, and one train includes a single large reactor vessel. Disinfection -Gas Are cylinders secured adequately? 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 Ibs 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: The facility may wish to evaluate the use of liquid hypochlorite as an option during future plant upgrades. Elimination of the chlorine gas cylinders may reduce operator risk and EPA Tier 2 Notification requirements. De -chlorination Type of system ? 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: Yes No NA NE Gas ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ Page# 4 DocuSign Envelope ID: 4227725B-54ED-46FA-BE03-9ADE9CA8C36E Permit: NC0023736 Inspection Date: 12/18/2019 Owner - Facility: Gunpowder Creek WWTP Inspection Type: Compliance Evaluation Standby Power 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? Comment: Effluent Pipe 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: Yes No NA NE ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ Page# 5