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Home My WebLink AboutNC0023299_Compliance Evaluation Inspection_20170614K. Water Resources EMVIROMMEMTAL QUALITY June 14, 2017 Mr. Andrew Luter Yes WL Utilities Exp, LLC 1900 1611 Street, Suite 950 Denver, CO 80202 SUBJECT: Compliance Evaluation Inspection Woodlake MHC WWTP NPDES Permit No. NCO023299 Guilford County Dear Mr. Luter- ROY COOPER Governor MICHAEL S. REGAN Secretary S. JAY ZIMMERMAN Director RECEIVEDINCDENWR JUN 2 3 2011 Water Quality Permitting Section On June 07, 2017, Min Xiao and George Smith of this office met with Randy Bell, the ORC of Woodlake MHC WWTP and Annie Haluska of Apex Companies to perform a Compliance Evaluation Inspection on the wastewater treatment system. The inspection findings are detailed below and an inspection checklist is attached. I. Permit The current permit became effective January 1, 2017, and will expire at midnight on September 30, 2021. A current copy of the permit was kept onsite. H. Self -Monitoring Program The DMRs were reviewed for the period of January 2016 through December 2016. The Woodlake facility violated effluent permit limits in April, May, June, July, August, September, October and December. These violations have been addressed in separate correspondence from this office previously. M. Flow Measurement The NPDES permit requires continuous flow recording and an annual calibration of the flow measuring device. Flow values reported on the DMR are obtained using an ISCO 4210 Ultrasonic flow meter. The meter was last calibrated by Carolina Technical Services Specialists on June 06, 2017. IV. Sludge Handling and Disposal Sludge is removed from the digester as needed (approximately twice per month) by Jenkins Waste Management for disposal in the City of Greensboro POTW. The last removal date was June 05, 2017. V. Operations and Maintenance In January 2017, Retaw Engineering conducted a feasibility study to see the possibility of replacing or rehabilitating the plant. Engineers will start to discuss the plan end of this month. Since September 2016, Woodlake WWTP has changed the operators. The current operators have done a good job of operating and maintaining the plant. Our office appreciates your efforts and hope these efforts can improve the treatment performance of the system and lead to more consistent compliance. State of North Carolina I Environmental Quality I Water Resources 450 West Hanes Mill Road, Suite 300, Winston-Salem, NC 27105 Phone: 336-776-98001 Internet. www ncdenr,gov VI. Facility Site Review The existing 0.07 MGD facility consists of the following units: influent pump station, bar screen, dual aeration basin systems (with seven separated small aeration tanks each side) and dual clarifier systems (with three square concrete clarifiers each side) followed by sludge digester (consists of six connected concrete tanks), tablet chlorinator, contact chamber, tablet dechlorinator and flow meter. A manually operated back-up generator is kept onsite, and an ISCO 4700 machine is used for composite sampling. VII. Records/Reports A review of the facility files indicates that all records are being maintained according to the permit. The ORC performs on-site measurements for flow, TRC, temperature, dissolved oxygen and pH. Other parameters are measured by Statesville Analytical laboratory. A comparison of the September 2016 monitoring report with the operator's records and the corresponding laboratory data found that all values were transcribed onto the DMR correctly VIII. Upstream/Downstream Sampling The upstream sampling location is approximately 50 feet away from the outfall, and the downstream sampling location is more than 100 feet. The staff of this office brought a meter to measure some parameters and the data are shown below. amphrr location Parameter Upstream Downstream Temperature ('C) 22.80 22.40 DO (mg/1) 6.36 7.30 DO Saturation (%) 73.60 86.70 pH 6.71 6.37 Conductivity (uS/cm) 67.00 91.50 IX. Effluent/Receiving Waters The system discharges into a tributary of Polecat Creek, class "WS -III" waters in the Cape Fear River Basin. The effluent was clear on the day of the inspection Should you have any questions concerning this report, please contact Min Xiao or me at (336) 776-9800. Sincerely, t/-�., 'J✓gyp/�/,/y9 � )y)�//� I` (Sherri V. (Knight, PE Regional Supervisor Water Quality Regional Operations Section Division of Water Resources cc: Annie Haluska (ahaluska@apexcos com) Central Files NPDES Unit WSRO r 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 E 2 15 I 3 I N00023299 I11 12 17/06/07 17 181,.E 191 c 201 I 211111 1 1 1 1 1 1 II 11 1 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 166 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA -- Reserved--- ----- 67 70 IJ 71 I I 72 L N 731 I 174 75 80 L- I I 1 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 30AM 17/06/07 17/01/01 Woodlake MHC WWTP 5418 Country Club Rd Exit Time/Date Permit Expiration Date Greensboro NC 27406 11 30AM 17/06/07 21/09/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Randall Keith Bell/ORC/336-373-7514/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Andrew Luter,1900 16th St Ste 950 Denver CO 80202//303-468-0521/ No Section C Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenance Records/Reports Self -Monitoring Program E 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 Min Xiao WSRO WQ//336769800/ YI" f7 I �O 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# NPDES yr/mo/day Inspection Type 31 NCO023299 I11 12 17/06/07 17 18 Section D Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# Cq Permit. NCO023299 Owner -Facility: WoodiakeMHCWWTP Inspection Date. 06/07/2017 Inspection Type: Compliance Evaluation Yes No NA NE Are records kept and maintained as required by the permit? 0 ❑ Permit Yes No NA NE (If the present permit expires In 6 months or less) Has the permittee submitted a new ❑ ❑ M ❑ application? 0 ❑ ❑ ❑ 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? M ❑ ❑ ❑ Is the Inspector granted access to all areas for inspection? 0 ❑ ❑ ❑ Comment. The current permit became effective January 1, 2017, and will expire at midnight on September 30, 2021 A current copy of the permit was kept onsite 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 M ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment Since September 2016, Woodlake WWTP has changed the operators The current operators have done a good job of operating and maintaining the plant 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? M ❑ ❑ ❑ 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? M ❑ ❑ ❑ 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? 0 ❑ ❑ ❑ Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ 0 ❑ (If the facility is = or > 5 MGD permitted flow) Do they operate 2417 with a certified operator ❑ ❑ 0 ❑ 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? 0 ❑ ❑ ❑ Is the backup operator certified at one grade less or greater than the facility classification? M ❑ ❑ ❑ Page# 3 0.4 Permit N00023299 Inspection Date: 06/07/2017 Owner -Facility: woodiakeMHCWWTP Inspection Type: Compliance Evaluation Type of bar screen Ext Air Record Keeping Yes No NA NE 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? ❑ ❑ S ❑ Comment. A comparison of the September 2016 monitoring report with the operator's records and the ❑ ❑ corresponding laboratory data found that all values were transcribed onto the DMR correctly Is the screen free of excessive debris? N Pump Station - Influent Yes No NA NE Is the pump wet well free of bypass Imes or structures? N ❑ ❑ ❑ Is the wet well free of excessive grease? 0 ❑ ❑ ❑ Are all pumps present? N ❑ ❑ ❑ Are all pumps operable? 0 ❑ ❑ ❑ Are float controls operable? N ❑ ❑ ❑ Is SCADA telemetry available and operational? N ❑ ❑ ❑ Is audible and visual alarm available and operational? N ❑ ❑ ❑ Comment Two Influent pumps were both operational Bar Screens Yes No NA NE Type of bar screen Ext Air Type of aeration system a Manual Is the basin free of dead spots? 0 ❑ b Mechanical ❑ Are surface aerators and mixers operational? ❑ ❑ Are the bars adequately screening debris? N ❑ ❑ ❑ Is the screen free of excessive debris? N ❑ ❑ ❑ Is disposal of screening in compliance? 0 ❑ ❑ ❑ Is the unit in good condition? N ❑ ❑ ❑ Comment A stainless stell bar screen with splitter box Is located prior to aeration basin Aeration Basins Yes No NA NE Mode of operation Ext Air Type of aeration system Diffused Is the basin free of dead spots? 0 ❑ ❑ ❑ Are surface aerators and mixers operational? ❑ ❑ ❑ Are the diffusers operational? ❑ ❑ ❑ Is the foam the proper color for the treatment process, 0 ❑ ❑ ❑ Does the foam cover less than 25% of the basin's surface? N ❑ ❑ ❑ Is the DO level acceptable? ❑ ❑ ❑ 0 Page# 4 Permit- NCO023299 Inspection Date 06/07/2017 Aeration Basins Is the DO level acceptable?(1 0 to 3 0 mg/1) Owner -Facility. WoodiakeMHCWWTP Inspection Type, Compliance Evaluation Yes No NA NE ❑ ❑ ❑ ■ Comment The dual aeration basin systems are with seven separated small aeration tanks each side It appeared that the aeration tanks were not effective and fully aerated 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? M ❑ ❑ ❑ Are weirs level? 0 ❑ ❑ ❑ Is the site free of weir blockage? 0 ❑ ❑ ❑ Is the site free of evidence of short-circuiting? 0 ❑ ❑ ❑ Is scum removal adequate? M ❑ ❑ ❑ Is the site free of excessive floating sludge? M ❑ ❑ ❑ Is the drive unit operational? ❑ ❑ 0 ❑ Is the return rate acceptable (low turbulence)? 0 ❑ ❑ ❑ Is the overflow clear of excessive solids/pin floc? M ❑ ❑ ❑ Is the sludge blanket level acceptable? (Approximately % of the sidewall depth) ❑ ❑ ❑ 0 Comment The dual clanfier systems are with three square concrete clarifiers each side. Aerobic Digester Yes No NA NE Is the capacity adequate? 0 ❑ ❑ ❑ Is the mixing adequate? 0 ❑ ❑ ❑ Is the site free of excessive foaming in the tank? M ❑ ❑ ❑ # Is the odor acceptable? M ❑ ❑ ❑ # Is tankage available for properly waste sludge? 0 ❑ ❑ ❑ Comment The sludge digester consists of six connected concrete tanks ❑ ❑ ❑ 0 Disinfection -Tablet Yes No NA NE Are tablet chlorinators operational? M ❑ ❑ ❑ Are the tablets the proper size and type? 0 ❑ ❑ ❑ Number of tubes in use? 4 Is the level of chlorine residual acceptable? ❑ ❑ ❑ M Is the contact chamber free of growth, or sludge buildup? 0 ❑ ❑ ❑ Is there chlorine residual prior to de -chlorination? ❑ ❑ ❑ 0 Page# 5 Permit NCO023299 Owner - Facility woodlake MHC VVVVrP Inspection Date. 06/07/2017 Inspection Type. Compliance Evaluation Disinfection -Tablet Yes No NA NE Comment Tablet chlorinator and stainless steel contact chamber De -chlorination Yes No NA NE Type of system? Tablet Is the feed ratio proportional to chlorine amount :1 to 1)? ❑ ❑ ❑ Is storage appropriate for cylinders? 0 ❑ ❑ ❑ # Is de -chlorination substance stored away from chlorine containers? 0 ❑ ❑ ❑ Comment Are the tablets the proper size and type? 0 ❑ ❑ ❑ Are tablet de-chlonnators operational? M ❑ ❑ ❑ Number of tubes In use? 4 Comment The tablet dechlonnator Is located above the contact chamber unit Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? ❑ ❑ ❑ Is flow meter calibrated annually? ❑ ❑ ❑ Is the flow meter operational? M ❑ ❑ ❑ (If units are separated) Does the chart recorder match the flow meter? ❑ ❑ M ❑ Comment Flow values reported on the DMR are obtained using an ISCO 4210 Ultrasonic flow meter The meter was last calibrated by Carolina Technical Services Specialists on June 06, 2017 Effluent Sampling 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)? Comment The temperature for sample storage was 2 7 °C Effluent Pipe Is right of way to the outfall properly maintained? `[:13:r•sLNEWL � ❑ ❑ ❑ ■ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE M ❑ ❑ ❑ Page# 6 i1L7 Permit: NC0023299 Inspection Date- 06/07/2017 Owner - Facility Woodlake MHC WWTP Inspection Type. Compliance Evaluation Effluent Pipe 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 Upstream / Downstream Samplina Is the facility sampling performed as required by the permit (frequency, sampling type, and sampling location)? Comment 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? Yes No NA NE N ❑ ❑ ❑ ❑ ❑ N ❑ Yes No NA NE N ❑ ❑ ❑ Yes No NA NE ❑ N ❑ ❑ ❑ ❑ ❑ N ❑ ❑ ❑ ■ M ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ N ❑ ❑ ❑ Comment A manually operated back-up generator Is kept onsite and can power the entire plant Page# 7