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Home My WebLink AboutNC0055271_Compliance Evaluation Inspection_20190802ROY COOPER Governor MICHAEL S. REGAN Secretary LINDA CULPEPPER Director Shirley Shields 1341 NC Hwy 87 N Elon, NC 27244 NORTH CAROLINA Environmental Quality August 2, 2019 Subject: Compliance Evaluation Inspection Report Shields MHP WWTP NPDES Permit NCO055271 Alamance County Dear Ms. Shields: ReCEIVED/NCDEB/DW2 AUG 0 8 2019 Water Quality perrrtlolpg Section On June 26, 2019, Paul DiMatteo and Kelli Park of the Division of Water Resources (Division), Winston- Salem Regional Office met with Mike Carson, Operator in Responsible Charge (ORC) to conduct a Compliance Evaluation Inspection of the above referenced wastewater treatment plant. This inspection consists of (1) a review of the permit and accompanying documentation to determine compliance with permit conditions, and (2) an on -site inspection of several collection system components. The attached inspection form notes the areas that were evaluated for the inspection, with any notable findings outlined as follows: 1. Mr. Carson said that he calibrates his dissolved oxygen (DO) meter quarterly. Please note that NC Certified Lab procedures for DO require the meter to be calibrated "prior to analysis of samples each day compliance monitoring is performed." A copy of this procedure is enclosed. 2. Mr. Carson expressed safety concerns with the downstream sampling location at the bridge on NC SR 1529 and suggested taking samples several hundred feet downstream instead. While the Regional Office does not have an issue with this change, a formal request should be made to Central Office. If you have any questions concerning this report please contact Paul DiMatteo at (336) 776-9691 or Lon Snider at (336) 776-9800. Sincerely, CDocuftned by Lati T SMxv n Loi'9n%fer, Regional Supervisor Water Quality Regional Operations Section Winston-Salem Regional Office Division of Water Resources, NCDEQ Enclosures — Inspection Report, Procedure for the Analysis of DO CC: WQS Winston-Salem Regional Office NPDES Unit Central Files wP. r. ®� Q^ _ North Carolina Department of Environmental Quality I Division of Water Resources Winston-Salem Regional Office 1 450 West Hanes Mill Road, Suite 3001 Winston-Salem, North Carolina 27105 NTH CRCARC1INA �� /'� 336.776.9800 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 1 2 15 I 3 I NCO055271 111 121 19/06/26 117 18 I C I 19 I G I 201 21111111111111111111111111111111111111111111 r6 I Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA , -Reserved 72 LNJ I73174 751 III I 1 80 71 it_] 67 70 L_j Section B FacilityData 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) 10 15AM 19/06/26 17/04/01 Shields Mobile Home Park Exit Time/Date Permit Expiration Date 1355 NC Hwy 87 N 1130AM 19/06/26 21/05/31 Elon College NC 27244 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data /// James M Carson/ORC/336-578-3264/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Jerry L Shields,1341 NC Hwy 87 N Elon NC 27244//336-584-6209/ No Section C Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Operations & Maintenance Records/Reports Self -Monitoring Program Sludge Handling Disposal 0 Facility Site Review Effluent/Receiving Waters 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 Paul DiMatteo /� WSRO WQ//336-776-9691/ $/2/2019 E�a.0 'D'; (a�d.e. FtOC7C2E5BB34D4 . Signature of Management Q A Revie DocuSigned by Agency/Office/Phone and Fax Numbers Date Lov T S",dtr 8/2/2019 EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete Page# NPDES yr/mo/day Inspection Type 31 NCO055271 I� 121 19/06/26 117 18 I c i Section D Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# Permit: NCO055271 Inspection Date. 06/26/2019 Owner -Facility: Shields Mobile Home Park Inspection Type: Compliance Evaluation Operations $ Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? E ❑ ❑ ❑ Does the facility analyze process control parameters, for ex MLSS, MCRT, Settleable ❑ ❑ N ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment The previous inspection noted some cracked or broken septic tank lids. Many of these have been repaired. 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? E ❑ ❑ ❑ # Are there any special conditions for the permit? ❑ E ❑ ❑ 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 permit became effective April 1, 2017 and expires May 31, 2021. Record Keeping Yes No NA NE Are records kept and maintained as required by the permit? N ❑ ❑ ❑ 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? 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 24/7 with a certified operator ❑ ❑ 0 ❑ on each shift? Is the ORC visitation log available and current? E ❑ ❑ ❑ 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? 0 ❑ ❑ ❑ Is a copy of the current NPDES permit available on site? N ❑ ❑ ❑ Page# 3 Permit: NC0055271 Owner - Facility: Shields Mobile Home Park Inspection Date: 06/26/2019 Inspection Type: Compliance Evaluation Record Keeping Yes No NA NE Facility has copy of previous year's Annual Report on file for review? Comment: Septic Tank (If pumps are used) Is an audible and visual alarm operational? Is septic tank pumped on a schedule? Are pumps or syphons operating properly? Are high and low water alarms operating properly? Comment: Sand Filters (Low rate) (If pumps are used) Is an audible and visible alarm Present and operational? Is the distribution box level and watertight? Is sand filter free of ponding? Is the sand filter effluent re -circulated at a valid ratio? # Is the sand filter surface free of algae or excessive vegetation? # Is the sand filter effluent re -circulated at a valid ratio? (Approximately 3 to 1) Comment. Disinfection - UV Are extra UV bulbs available on site? Are UV bulbs clean? Is UV Intensity adequate? Is transmittance at or above designed level? Is there a backup system on site? Is effluent clear and free of solids? ❑ ❑ E ❑ Yes No NA NE ❑ ❑ ■ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑. ❑ ■ ❑ Yes No NA NE ❑ ❑ ❑ ■ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ■ E ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: Durino the insDection the UV system appeared to be offline. Mr. Carson said It was workln fine last time he checked It. He worked on the Issue after the inspection and later reported that he thought a bug nesting in the electrical outlet caused It to stop working. He replaced the outlet and the system ran again. Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? N ❑ ❑ ❑ Are the receiving water free of foam other than trace amounts and other debris? N ❑ ❑ ❑ Page# 4 Permit: NCO055271 Inspection Date- 06126/2019 Effluent Pipe If effluent (diffuser pipes are required) are they operating properly? Owner -Facility: Shields Mobile Home Park Inspection Type: Compliance Evaluation Comment: There is a step aerator at the effluent and It appeared to be In good condition. 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 Yes No NA NE ❑ ❑ ■ ❑ Yes No NA NE ❑ ❑ E ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ N ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, and ❑ ❑ ❑ sampling location)? Comment Mr. Carson mentioned that he wanted to change the downstream sampling point due to several hundred feet below the outfall rather than at the bridge on NC SR 1529 due to safety concerns. -A request should be made to the permit writers. 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? E ❑ ❑ ❑ # Is the facility using a contract lab? N ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6 0 degrees ❑ ❑ ❑ Celsius)? Incubator (Fecal Conform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ ❑ ❑ Incubator (BOD) set to 20 0 degrees Celsius +/- 1 0 degrees? ❑ ❑ ❑ 0 Comment ORC said he calibrates his DO meter quarterly Note that certified field lab procedures Indicate that DO meters used for compliance monitoring should be calibrated each day It Is used for that purpose Page# 5 NORTH CAROLINA WASTEWATER/GROUNDWATER LABORATORY CERTIFICATION APPROVED PROCEDURE FOR THE ANALYSIS OF DISSOLVED OXYGEN (DO) This document provides an approved procedure for the analysis of DO for compliance monitoring per 15A NCAC 2H 0805 (a) (7) and (g) (4) HOLDING TIME: • Samples must be analyzed within 15 minutes of collection (40 CFR Part 136 Table II); however, in situ or immediate analysis is recommended due to the unstable nature of dissolved oxygen in samples GENERAL INFORMATION: • Types of probes a Dissolved Oxygen Membrane Electrode b Luminescence Dissolved Oxygen (LDO) Sensor • Movement of water across the membrane (for membrane electrode technologies) is important for accurate readings Some probes come with stirrers for this purpose Measurements should be taken while the stirrer is in use or by swirling the DO probe in the sample flow Preferably, insert the probe into flowing conditions If analyzed in a container, stir gently with the probe or add a stir bar Do not put the probe on the sides or the bottom of the container • Follow the manufacturer's instructions for probe storage • Sample duplicates are not a required quality control element for Field parameters METER CALIBRATION: • Instruments are to be calibrated according to the manufacturer's calibration procedure prior to analysis of samples each day compliance monitoring is performed • The laboratory must use moist air for the air calibration This is accomplished by calibrating the electrode in an environment with a high relative humidity Using dry air for the calibration can result in errant readings • The laboratory must document each time that a calibration is performed Calibration documentation must include the following, where applicable to the instrument used and the type of calibration performed. elevation, temperature, barometric pressure (in mmHg), salinity. After calibration, record the final DO reading in mg/L, the slope or % efficiency • For LDO sensors that cannot be calibrated, the calibration must be verified each day of use. This can be performed by back calculating the theoretical DO for the current air calibration conditions (e g , temperature, elevation, barometric pressure, etc) The calculated DO value must verify the meter reading within ±0 5 mg/L Refer to the Dissolved Oxygen Meter Calibration Venfication handout at the end of this document If the meter verification does not read within ±0 5 mg/L of the theoretical DO, corrective action must be taken • When performing analyses at multiple sample sites, a post -analysis calibration verification must be performed at the end of the run, regardless of meter type It is recommended that a mid -day calibration verification be performed when samples are analyzed over an extended period of time The calculated DO value must verify the meter reading within ±0 5 mg/L If the meter verification does not read within ±0 5 mg/L of the theoretical DO, corrective action must be taken Alternatively, if the meter is calibrated at each sample site prior to analysis, a post -analysis calibration verification is not required DOCUMENTATION: The following must be documented in indelible ink whenever sample analysis is performed 1 Date and time of sample collection Rev 12/05/2017 2. Date and time of sample analysis to verify the 15-minute holding time is met Alternatively, one time may be documented for collection and analysis with the notation that samples are measured in situ or immediately at the sample site 3 Facility name, sample site (ID or location), and permit number 4 Collector's/analyst's name or initials 5 Calibration variables (elevation, temperature, barometric pressure [in mmHg], salinity) 6 Meter calibration and/or verification time(s) 7 Final calibration information (final DO reading in mg/L, the slope or % efficiency) 8 Theoretical value and value obtained for the calibration verification(s), where applicable 9 Units of measure 10 Instrument identification (serial number preferred) 11 Parameter analyzed 12 Method reference 13. Data qualifier(s), when applicable 14 Equipment maintenance (recommended) Refer to http.//deg.nc.gov/about/divisions/water-resources/water-resources-data/water-sciences-home- page/laboratory-certification-branch/technical-assistance-policies) for additional quality assurance and quality control requirements Ref- Standard Methods 4500-0 G - 2011 Hach Method 10360, Rev 12, October 2011 In Situ Method 1002-8-2009 ASTM Method D888-09 (B) ASTM Method D888-09 (C) Rev 12/05/2017 Dissolved Oxygen Meter Calibration Verification r, DO meters/probes must be calibrated each day of use prior to sample analysis. If the meter cannot be calibrated, the calibration must be verified each day of use. Additionally, when performing DO analyses at multiple sample sites, a post analysis calibration verification must be analyzed at the end of the run for all types of DO probes, unless the meter is recalibrated at each sample site Below is a procedure for verifying the calibration of a DO probe 1) Follow the manufacturer's instructions for meter operation - 2) Place probe in a plastic bag, the probe storage cup, the storage well of the meter(each containing a wet sponge), or a BOD bottle partially filled with water.Allow appropriate instrument warm up time. - 3) Read DO and temperature. 4) Check the reading vs the solubility table below and apply appropriate atmospheric(barometric) pressure or altitude correction factor 5) Calculated DO value must verify meter reading within ±0.5 mg/L (do NOT calculate and apply a correction factor to calculated DO) Temp. °C DO mg/L Temp °C DO mg/L Atmospheric Pressure mm Hg Equivalent Altitude Ft. 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Wit' 7 76 in 623 5391 82 135 1042 290 7.69 616 5717 .81 .�a41,a5 N, ]F-lUl l ,ecpg" � � s w5.V,, 7 4s2*e it .04 ft" 1' _-""+"-t"s o$0:"r• at a� =k',M*� g' , _te G oa7 �a`� ,!"x � :��.8a 14 5 10 20 30.0 7.56 E g,l ;,,",?' ?600 ,, - ^,. ,, , 5m6tn.,o3$ ��, ttr ��=. t- i9" ,a - ; ; ift'll ji ,4fiR1,10ti :; t it 1 5.0 ` 593 6717 78 15.5 9 98 31 0 7.43 :,,,,KI., ,' s f` "wt. - _1-�,g s z, e ig6 -- . `"��7�37;,t5/n:; Ref YSI Model 5000/5100 DO Meter Manual Slight variations in DO,pressure,and/or altitude may be found in other manuals �6;0 ="<9:8r7 .._�" 3�E �� .��..a-. 16 5 9.77 32 0 7 31 Example If ambient temperature is 21°C and elevation is approximately 1126 ft, the theoretical DO 441117403 .,,•9f67` ,,,. ' 0-3.2 5, 7424 would be. 175 957 330 718 TIM 11' ' , ..338 1 ,t 712, �' 8.92 X 0.96 = 8 56 mg/L 18 5 9 38 34.0 7 07 c `"1;9 b1S 'Itiet 49 28 3:415 _ -la a or, If ambient temperature is 21°C and the atmospheric(barometric) pressure is 745 mm Hg, the r 5 sfit 0`' i gw theoretical DO would be 8.92 X 0.98 = 8.74 mg/L