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Home My WebLink AboutNC0036269_CEI BIMS_20210128United 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 IS I 3 I NCO036269 I11 121 21/01/21 I17 18 i,- i 19 i G i 201 21111111111111111111111111111111111111111111 f6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 CA ---------------------- Reserved ------------------- 67 70 i� LJ i 71 I tyI 72 i Ln, i 73LLI74 71 J 1 1 1 1 L L j80 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 permit Number) 09:55AM 21/01/21 13/12/01 Rocky River WWTP 6400 Breezy Ln Exit Time/Date Permit Expiration Date Concord NC 28025 11:51AM 21/01/21 18/10/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data James Christian Sims/ORC/704-788-4164/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Travis M Fowler,232 Davidson Hwy Concord NC 280270428//704-788-4164/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran 0 Sludge Handling Dispos Facility Site Review Effluent/Receiving Wate Laboratory 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 DocuSigned by: Roberto Scheller E� DWR/MROWQ/252-946-6481/ 1/28/2021 91 C2A007838943E... DocuSigned by: Date Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numb TIA4,4,tw H Pzt.,,, for WCB 1. 28.21 W. Corey Basinger DWR/Division of Water Quality/704-235-219 F161FB69A2D84A3... EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# NPDES yr/mo/day Inspection Type (Cont.) 31 NCO036269 I11 12I 21/01/21 117 18 ICI Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) The subject facility is a 26.5 MGD pure oxygen two stage WWTP. Solids are handled by an onsite sludge incinerator. The following items were noted during the subject inspection: - Review of eDMRs for a 12 month period in 2020 indicate that the subject facility is at 82% of permitted flow. In accordance with 15A NCAC 02T .0118 DEMONSTRATION OF FUTURE WASTEWATER TREATMENT CAPACITIES No permits for sewer line extensions shall be issued to wastewater treatment systems owned or operated by municipalities, counties, sanitary districts, or public utilities unless they meet the following requirements: (1) Prior to exceeding 80 percent of the system's permitted hydraulic capacity (based on the average flow during the last calender year), the permittee shall submit an engineering evaluation... A copy of "Rocky River Regional Wastewater Treatment Plant Expansion Study" was received in the Mooresville Regional Office on October 29, 2020. - Serial number of meter being calibrated should be indicated on calibration sheet. Deficiency was corrected at time of inspection. - Effluent from #4 secondary clarifier was flowing under gaps in weir and not over top in v-notch weir resulting in short-circuiting. In accordance with your NPDES Permit #NC0036269, Part II, Section C, 2. Proper Operation and Maintenance; The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the Permittee to achieve compliance with permit conditions. - During records review it was noted that the scrubber blowdown flow stream from the sludge incinerator contains cyanide. Scrubber water and furnance side stream cyanide ranged from 0.712 to 14.81 mg1I with and average of 5.4 mg/I. In a comment letter for Ammonia Treatment Evaluation Study Comments, dated December 9, 2020, it is reported that when the WWTP is operated in series mode 70 - 90% of primary effluent is sent to Step 1 where cyanide is pretreated and removed before combining with remaining primary effluent serr to Step 2. Page# Permit: NCO036269 Owner -Facility: Rocky River WWTP Inspection Date: 01/21/2021 Inspection Type: Compliance Evaluation 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: Copy of draft permit was sent permittee dated March 23, 2020 for review. Record Keeping Yes No NA NE Are records kept and maintained as required by the permit? 0 ❑ ❑ ❑ Is all required information readily available, complete and current? 0 ❑ ❑ ❑ Are all records maintained for 3 years (lab. reg. required 5 years)? 0 ❑ ❑ ❑ Are analytical results consistent with data reported on DMRs? 0 ❑ ❑ ❑ Is the chain -of -custody complete? 0 ❑ ❑ ❑ Dates, times and location of sampling Name of individual performing the sampling Results of analysis and calibration Dates of analysis Name of person performing analyses Transported COCs Are DMRs complete: do they include all permit parameters? ❑ ❑ ❑ Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ ❑ (If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operatc ❑ ❑ ❑ on each shift? Is the ORC visitation log available and current? ❑ ❑ ❑ Is the ORC certified at grade equal to or higher than the facility classification? ❑ ❑ ❑ Is the backup operator certified at one grade less or greater than the facility classification' ❑ ❑ ❑ Is a copy of the current NPDES permit available on site? 0 ❑ ❑ ❑ Facility has copy of previous year's Annual Report on file for review? 0 ❑ ❑ ❑ Comment: Laboratory Yes No NA NE Are field parameters performed by certified personnel or laboratory? 0 ❑ ❑ ❑ Are all other parameters(excluding field parameters) performed by a certified lab? 0 ❑ ❑ ❑ Page# 3 Permit: NCO036269 Owner -Facility: Rocky River WWTP Inspection Date: 01/21/2021 Inspection Type: Compliance Evaluation Laboratory Yes No NA NE # Is the facility using a contract lab? 0 ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees 0 ❑ ❑ ❑ Celsius)? Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ ❑ ❑ Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? ❑ ❑ ❑ Comment: Serial number for meter beina calibrated should be indicated on calibration sheet linkin sheet back to a specific meter. 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: At time of inspection facility appeared to be well maintained and operated. 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? 0 ❑ ❑ ❑ Is the grit free of excessive odor? 0 ❑ ❑ ❑ # Is disposal of grit in compliance? 0 ❑ ❑ ❑ Comment: Influent Sampling Yes No NA NE Page# 4 Permit: NCO036269 Inspection Date: 01/21/2021 Influent Sampling # Is composite sampling flow proportional? Is sample collected above side streams? Is proper volume collected? Is the tubing clean? Owner - Facility: Rocky River WWTP Inspection Type: Compliance Evaluation # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)? Is sampling performed according to the permit? Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: At time of inspection influent sampler was recorded at 2.9 degrees Celsius. Primary Clarifier 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 sludge blanket level acceptable? Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth) Comment: Pure Oxygen Type of pure oxygen system Is there a back-up source for the system? Are mixers operational? Are samples port/points easily accessible? Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ■ Yes No NA NE Generated on -site ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: Treatment consist of first staae aeration (pure oxvaen): four (4) intermediate clarifiers second stage aeration (pure oxygen) with four (4) final clarifiers. Secondary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater? 0 ❑ ❑ ❑ Is the site free of excessive buildup of solids in center well of circular clarifier? 0 ❑ ❑ ❑ Are weirs level? 0 ❑ ❑ ❑ Page# 5 Permit: NCO036269 Inspection Date: 01/21/2021 Secondary Clarifier Is the site free of weir blockage? Is the site free of evidence of short-circuiting? Owner -Facility: Rocky River WWTP Inspection Type: Compliance Evaluation 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'/4 of the sidewall depth) Yes No NA NE ■ ❑ ❑ ❑ ❑ ■ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ■ Comment: At time of inspection it was noted that flow in #4 calrifier was passinq from under weir plate and not over v-notch weirs. Weirs had short-circuited in several places. It is necessary to temporarily repair weirs until secondary clarifier can be refurbished. Chemical Feed Yes No NA NE Is containment adequate? 0 ❑ ❑ ❑ Is storage adequate? 0 ❑ ❑ ❑ Are backup pumps available? 0 ❑ ❑ ❑ Is the site free of excessive leaking? 0 ❑ ❑ ❑ Comment: Pumps-RAS-WAS Yes No NA NE Are pumps in place? 0 ❑ ❑ ❑ Are pumps operational? 0 ❑ ❑ ❑ Are there adequate spare parts and supplies on site? ❑ ❑ ❑ Comment: Effluent Sam plinq Yes No NA NE Is composite sampling flow proportional? 0 ❑ ❑ ❑ Is sample collected below all treatment units? 0 ❑ ❑ ❑ Is proper volume collected? 0 ❑ ❑ ❑ Is the tubing clean? 0 ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees 0 ❑ ❑ ❑ Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type 0 ❑ ❑ ❑ representative)? Comment: At time of inspection effluent sampler was recorded at 3.0 degrees Celsius. Page# 6 Permit: NCO036269 Owner -Facility: Rocky River WWTP Inspection Date: 01/21/2021 Inspection Type: Compliance Evaluation Effluent Sam plinq Yes No NA NE Disinfection -Liquid Yes No NA NE Is there adequate reserve supply of disinfectant? 0 ❑ ❑ ❑ (Sodium Hypochlorite) Is pump feed system operational? 0 ❑ ❑ ❑ Is bulk storage tank containment area adequate? (free of leaks/open drains) 0 ❑ ❑ ❑ Is the level of chlorine residual acceptable? 0 ❑ ❑ ❑ Is the contact chamber free of growth, or sludge buildup? 0 ❑ ❑ ❑ Is there chlorine residual prior to de -chlorination? ❑ ❑ ❑ ❑ Comment: De -chlorination Yes No NA NE Type of system ? Liquid Is the feed ratio proportional to chlorine amount (1 to 1)? 0 ❑ ❑ ❑ Is storage appropriate for cylinders? ❑ ❑ 0 ❑ # Is de -chlorination substance stored away from chlorine containers? ❑ ❑ 0 ❑ Are the tablets the proper size and type? ❑ ❑ 0 ❑ Comment: Sodium Bisulfite used for dechlorination. Are tablet de -chlorinators operational? ❑ ❑ 0❑ Number of tubes in use? Comment: Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? 0 ❑ ❑ ❑ Is flow meter calibrated annually? 0 ❑ ❑ ❑ Is the flow meter operational? 0 ❑ ❑ ❑ (If units are separated) Does the chart recorder match the flow meter? 0 ❑ ❑ ❑ Comment: Flow meter last calibrated on 1/15/2021. Standby Power Yes No NA NE Is automatically activated standby power available? 0 ❑ ❑ ❑ Is the generator tested by interrupting primary power source? 0 ❑ ❑ ❑ Is the generator tested under load? 0 ❑ ❑ ❑ Was generator tested & operational during the inspection? ❑ ❑ ❑ Page# 7 Permit: NCO036269 Inspection Date: 01/21/2021 Owner -Facility: Rocky River WWTP Inspection Type: Compliance Evaluation Standby Power 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? Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: At time of inspection the point of discharge into Rocky River was reviewed and a small amount of very fine foam was being generated. Foam dissipated 50 - 60 feet downstream of discharge point.. Solids Handling Equipment Is the equipment operational? Is the chemical feed equipment operational? Is storage adequate? Is the site free of high level of solids in filtrate from filter presses or vacuum filters? Is the site free of sludge buildup on belts and/or rollers of filter press? Is the site free of excessive moisture in belt filter press sludge cake? The facility has an approved sludge management plan? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ■ ❑ ❑ ❑ Comment: Facility has two gravity -flow sludge thickners, sludge conditioning (plolymer addition), two (2 centrifuges, sludge incinerator, and sludge -ash settling basin. Page# 8