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HomeMy WebLinkAbout#5338_2021_1013_JP_FINAL December 6, 2021 5338 Ms. Judy Chaney Collins Estates MHP 1138 Rocky Run Rd. - Apt. 2 Midway Park, NC 28544 Subject: North Carolina Wastewater/Groundwater Laboratory Certification Branch (NC WW/GW LCB) Maintenance Inspection Dear Ms. Chaney: Enclosed is a report for the inspection performed on October 13, 2021 by Jill Puff. I apologize for the delay in getting this report to you. Where Finding(s) are cited in this report, a response is required. Within thirty days, please supply this office with a written item for item description of how these Finding(s) were corrected. Please describe the steps taken to prevent recurrence and include an implementation date for each corrective action. If the Finding(s) cited in the enclosed report are not corrected, enforcement actions may be recommended. For Certification maintenance, your laboratory must continue to carry out the requirements set forth in 15A NCAC 02H .0800. A copy of the laboratory’s Certified Parameter List at the time of the audit is attached. This list will reflect any changes made during the audit. Copies of the checklists completed during the inspection may be requested from this office. Thank you for your cooperation during the inspection. If you have questions or need additional information, please contact me at (919) 733- 3908 ext. 251. Sincerely, Anna Ostendorff Technical Assistance & Compliance Specialist Division of Water Resources Attachment cc: Todd Crawford, Jill Puff, Master File On-Site Inspection Report LABORATORY NAME: Collins Estates MHP NPDES PERMIT #: NC0036676 ADDRESS: 1138 Rocky Run Rd., Midway Park, NC 28544 CERTIFICATE #: 5338 DATE OF INSPECTION: October 13, 2021 TYPE OF INSPECTION: Field Maintenance AUDITOR(S): Jill Puff and Anna Ostendorff LOCAL PERSON(S) CONTACTED: Patrick Mullally I. INTRODUCTION: This laboratory was inspected by representatives of the North Carolina Wastewater/Groundwater Laboratory Certification Branch (NC WW/GW LCB) to verify its compliance with the requirements of 15A NCAC 02H .0800 for the analysis of compliance monitoring samples. II. GENERAL COMMENTS: The facility has a dedicated outbuilding that is used for laboratory purposes. Staff was forthcoming and responded well to suggestions from the auditors. All required Proficiency Testing (PT) Samples for the 2021 PT Calendar Year have not yet been analyzed. The deadline for PT Sample results to be received by this office was September 30, 2021. Exceeding this deadline constituted a first unacceptable result, for which a remedial PT Sample and Corrective Action Report (CAR) must be submitted by December 31, 2021. The laboratory did not have Quality Assurance (QA) and/or Standard Operating Procedure (SOP) document(s) in place for currently certified parameters. These documents must be submitted for review as specified in Finding A. The laboratory is reminded that any time changes are made to laboratory procedures, the laboratory must update the QA/SOP document(s) and inform relevant staff. Any changes made in response to Findings, Recommendations or Comments listed in this report must be incorporated to insure the method is being performed as stated, references to methods are accurate, and the QA and/or SOP document(s) is in agreement with each approved practice, test, analysis, measurement, monitoring procedure or regulatory requirement being used in the laboratory. In some instances, the laboratory may need to create an SOP to document how new functions or policies will be implemented. The laboratory is also reminded that SOPs are required to be reviewed at least every two years and are intended to describe procedures exactly as they are to be performed. Use of the word “should” is not Page 2 #5338 Collins Estates MHP appropriate when describing requirements (e.g., Quality Control (QC) frequency, acceptance criteria, etc.). Evaluate all SOPs for the proper use of the word “should”. Contracted analyses are performed by Environmental Chemists, Inc. (Certification # 94). Approved Procedure documents for the analysis of the facility’s currently certified Field Parameters were provided to the laboratory at the time of the inspection. III. FINDINGS, REQUIREMENTS, COMMENTS AND RECOMMENDATIONS: General Laboratory A. Finding: SOPs have not been developed for the methods included on the laboratory’s Certified Parameters Listing (CPL). Requirement: Laboratory procedures shall comply with Subparagraph (a)(1) of this Rule. A copy of each analytical method or Approved Procedure and Standard Operating Procedure shall be available to each analyst and available for review upon request by the State Laboratory. Standard Operating Procedure documentation shall state the effective date of the document and shall be reviewed every two years and updated if changes in procedures are made. Each laboratory shall have a formal process to track and document review dates and any revisions made in all Standard Operating Procedure documents. Supporting Records shall be maintained as evidence that these practices are implemented. Ref: 15A NCAC 02H .0805 (g) (4). Comment: An SOP describes the method in such detail that an experienced analyst unfamiliar with the method can obtain acceptable results and meet documentation requirements. SOPs must be developed which describe in detail how a method is performed in that particular laboratory. Templates are available on our website for all Field Parameters to aid in constructing SOPs. The pH and TRC SOPs must be submitted for review by February 28, 2022 and the DO and Temperature SOPs must be submitted for review by May 31, 2022. B. Finding: The laboratory is lacking a documented training program. Requirement: Each laboratory shall develop and implement a documented training program that includes the following: that staff have the education, training, experience, or demonstrated skills needed to generate quality control results within method-specified limits and that meet the requirements of these Rules; that staff have read the laboratory quality assurance manual or applicable Standard Operating Procedures; that staff have obtained acceptable results on Proficiency Testing Samples pursuant to Rule .0803(1) of this Section or other demonstrations of proficiency (e.g., side-by-side comparison with a trained analyst, acceptable results on a single-blind performance evaluation sample, an initial demonstration of capability study prescribed by the reference method). Ref: 15A NCAC 02H .0805 (g) (5). Documentation: C. Finding: The laboratory benchsheet lacked required documentation for a portion of samples collected February 1, 2021. Requirement: All laboratories shall use printable laboratory benchsheets. Certified Data shall be traceable to the associated sample analyses and shall consist of all applicable items found in 15A NCAC 02H .0805 (g) (2). Each item shall be recorded each time samples are analyzed. Ref: 15A NCAC 02H .0805 (g) (2). Page 3 #5338 Collins Estates MHP Comment: The laboratory did not have a benchsheet or calibration data for Upstream and Downstream data reported on the eDMR for February 1, 2021. See the Paper Trail summary table for details. D. Finding: The laboratory benchsheet is lacking required documentation: the instrument identification, the date of sample analyses, the proper units of measure. Requirement: All laboratories shall use printable laboratory benchsheets. Certified Data shall be traceable to the associated sample analyses and shall consist of: the instrument identification; the date of sample analyses; the proper units of measure. Each item shall be recorded each time samples are analyzed. Analyses shall conform to methodologies found in Subparagraph (a)(1) of this Rule. Ref: 15A NCAC 02H .0805 (g) (2) (C), (G) and (L). Comment: The instrument identification is not documented on the parameter benchsheet. This finding applies to Dissolved Oxygen (DO), pH and Temperature. Comment: The year of sample analysis is not always documented on the parameter benchsheet. This finding applies to DO, pH, Total Residual Chlorine (TRC) and Temperature. Comment: The units of measure are not documented on the monthly plant log. This finding applies to DO, pH, TRC, and Temperature. E. Finding: The laboratory is not documenting traceability information for purchased materials, reagents and standards. Requirement: 15A NCAC 02H .0805 (a)(7)(K) and (g)(7) requires laboratories to have a documented system of traceability for the purchase, preparation, and use of all chemicals, reagents, standards, and consumables. That system must include documentation of the following information: Date received, Date Opened (in use), Vendor, Lot Number, and Expiration Date (where specified). This information as well as the vendor and/or manufacturer, lot number, and expiration date must be retained for primary standards, chemicals, reagents, and materials used for a period of five years. Consumable materials such as pH buffers, lots of pre-made standards and/or media, solids and bacteria filters, etc. are included in this requirement. Ref: NC WW/GW LCB Policy. Comment: The laboratory does not have a traceability log. Comment: The system of traceability must make it clear what lot numbers of reagents were used in each analysis. F. Finding: Chemical containers are not dated when received and when opened. Requirement: Chemical containers shall be dated when received and when opened. Ref: 15A NCAC 02H .0805 (g) (7). Comment: The laboratory does not document dates received and opened on the pH buffer bottles. G. Finding: Benchsheets reference outdated methods or do not include a method reference. Requirement: All laboratories shall use printable laboratory benchsheets. Certified Data shall be traceable to the associated sample analyses and shall consist of: the method or Standard Page 4 #5338 Collins Estates MHP Operating Procedure. Each item shall be recorded each time samples are analyzed. Ref: 15A NCAC 02H .0805 (g) (2) (A). Comment: The laboratory benchsheets for DO, pH and TRC referenced methods with the outdated -2000 approval year, not the methods listed on the CPL. Comment: The Temperature benchsheet did not include a method reference. H. Finding: The DO meter calibration is not being documented each day that Compliance Samples are analyzed. Requirement: Laboratory procedures shall comply with Subparagraph (a)(1) of this Rule. Ref: 15A NCAC 02H .0805 (g) (4). Requirement: The laboratory must document each time that a calibration is performed. Calibration documentation must include the instrument identif ication as well as the temperature, the elevation or barometric pressure (in mmHg), and the salinity* of the sample to be analyzed. After calibration, record the final DO reading in mg/L or % saturation. Ref: NC WW/GW LCB Approved Procedure for the Analysis of Dissolved Oxygen (DO). Comment: Per NC WW/GW LCB policy, facilities may use the Salinity default value of zero when calibrating the DO meter unless it is known or suspected that the Salinity value of the samples being analyzed is > 9 ppt. In those situations, actual Salinity values must be used. Regardless of which value is used, it must be documented. Comment: The laboratory benchsheet for DO included a section for calibration. The dataset provided by the laboratory did not include any documentation of calibration. Proficiency Testing I. Finding: The laboratory does not have a documented plan for PT procedures. Requirement: Laboratory procedures shall comply with Subparagraph (a)(1) of this Rule. A copy of each analytical method or Approved Procedure and Standard Operating Procedure shall be available to each analyst and available for review upon request by the State Laboratory. Standard Operating Procedure documentation shall state the effective date of the document and shall be reviewed every two years and updated if changes in procedures are made. Each laboratory shall have a formal process to track and document review dates and any revisions made in all Standard Operating Procedure documents. Supporting Records shall be maintained as evidence that these practices are implemented. Ref: 15A NCAC 02H .0805 (g) (4). Requirement: Laboratories must have a documented plan [this is usually detailed in the laboratory’s Quality Assurance Manual or may be a separate Standard Operating Procedure (SOP)] of how they intend to cover the applicable program requirements for Proficiency Testing per their scope of accreditation. This plan shall cover any commercially available PT Samples and any inter-laboratory organized studies, as applicable. The laboratory must also be able to explain when PT Sample analysis is not possible for certain methods and provide a description of what the laboratory is doing in lieu of Proficiency Testing. This shall be detailed in the plan. The plan must also address the laboratory’s process for submission of PT Sample results and related Corrective Action Reports (CARs). Ref: Proficiency Testing Requirements, February 19, 2020, Revision 5, Section 3.0. Page 5 #5338 Collins Estates MHP J. Finding: The laboratory is not documenting the preparation of PT Samples. Requirement: PT Samples received as ampules are diluted according to the Accredited PT Sample Provider’s instructions. It is important to remember to document the preparation of PT Samples in a traceable log or other traceable format. The diluted PT Sample then becomes a routine Compliance Sample and is added to a routine sample batch for analysis. No documentation is needed for whole volume PT Samples which require no preparation, however the instructions must be maintained. Ref: Proficiency Testing Requirements, February 19, 2020, Revision 5, Section 3.6. Comment: Dating and initialing the instruction sheet for each prepared PT Sample would satisfy the documentation requirement. K. Finding: PT Samples are not being analyzed in the same manner as routine Compliance Samples. Requirement: Laboratories are required to analyze an appropriate PT Sample by each parameter method on the laboratory’s CPL. The same PT Sample may be analyzed by one or more methods. Laboratories shall conduct the analyses in accordance with their routine testing, calibration and reporting procedures, unless otherwise specified in the instructions supplied by the Accredited PT Sample Provider. This means that they are to be logged in and analyzed using the same staff, sample tracking systems, standard operating procedures including the same equipment, reagents, calibration techniques, analytical methods, preparatory techniques (e.g., digestions, distillations and extractions) and the same quality control acceptance criteria. PT Samples shall not be analyzed with additional quality control. They are not to be replicated beyond what is routine for Compliance Sample analysis. Although, it may be routine to spike Compliance Samples, it is neither required, nor recommended, for PT Samples. PT sample results from multiple analyses (when this is the routine procedure) must be calculated in the same manner as routine Compliance Samples. Ref: Proficiency Testing Requirements, February 19, 2020, Revision 5, Section 3.6. Comment: The laboratory is analyzing the prepared TRC PT sample in triplicate. L. Finding: Additional QC beyond what is routine for Compliance Samples is being analyzed with PT Samples. Requirement: Laboratories are required to analyze an appropriate PT Sample by each parameter method on the laboratory’s CPL. The same PT Sample may be analyzed by one or more methods. Laboratories shall conduct the analyses in accordance with their routine testing, calibration and reporting procedures, unless otherwise specified in the instructions supplied by the Accredited PT Sample Provider. This means that they are to be logged in and analyzed using the same staff, sample tracking systems, standard operating procedures including the same equipment, reagents, calibration techniques, analytical methods, preparatory techniques (e.g., digestions, distillations and extractions) and the same quality control acceptance criteria. PT Samples shall not be analyzed with additional quality control. They are not to be replicated beyond what is routine for Compliance Sample analysis. Although, it may be routine to spike Compliance Samples, it is neither required, nor recommended, for PT Samples. PT sample results from multiple analyses (when this is the routine procedure) must be calculated in the same manner as routine Compliance Samples. Ref: Proficiency Testing Requirements, February 19, 2020, Revision 5, Section 3.6. Comment: An additional known QC Sample for TRC is purchased and analyzed on the same day as the PT Sample. Page 6 #5338 Collins Estates MHP Quality Control M. Finding: The temperature sensor on the YSI Model 55-12B Dissolved Oxygen meter used to obtain compliance Temperature values has not been checked against a National Institute of Standards and Technology (NIST) traceable thermometer. Requirement: Laboratory procedures shall comply with Subparagraph (a)(1) of this Rule. Ref: 15A NCAC 02H .0805 (g) (4). Requirement: All compliance temperature-measuring devices without a valid NIST certificate must be checked initially and every 12 months against an NIST traceable temperature-measuring device and the process documented. Documentation must include the serial number of the device being checked. The serial number, stated accuracy and expiration date of the NIST traceable temperature-measuring device used in the comparison must also be documented. Verification data must be kept on file and be available for inspection for 5 years. (NOTE: Vendors or other Certified laboratories may provide assistance in meeting this requirement. When a vendor or other Certified laboratory provides this assistance, they must provide a copy of their NIST Certificate or the serial number, accuracy and calibration expiration date.) Ref: NC WW/GW LCB Approved Procedure for the Analysis of Temperature. Requirement: To check a compliance temperature-measuring device, compare readings at two temperatures that bracket the range of compliance samples routinely analyzed against an NIST traceable temperature-measuring device and record all four readings. The readings from both devices must agree within 0.5ºC. If they do not, the device may not be used for temperature compliance monitoring. Ref: NC WW /GW LCB Approved Procedure for the Analysis of Temperature. N. Finding: The DPD indicator being used to analyze TRC is beyond the expiration date. Requirement: Chemical containers shall be dated when received and when opened. Reagent containers shall be dated, identified, and initialed when prepared. Chemicals and reagents exceeding the expiration date shall not be used. Chemicals and reagents shall be assigned expiration dates by the laboratory if not given by the manufacturer. If the laboratory is unable to determine an expiration date for a chemical or reagent, a one-year time period from the date of receipt shall be the expiration date unless degradation is observed prior to this date. Ref: 15A NCAC 02H .0805 (g) (7). Comment: The DPD indicator expired in 2019. Total Residual Chlorine – Standard Methods, 4500 Cl G-2011 (Aqueous) O. Finding for Immediate Response: The laboratory is not verifying the factory- set calibration every 12 months. Requirement: For colorimetric analyses, a series of five or more non-zero standards for a curve prepared every 12 months or three or more non-zero standards for curves established each day, or standards as set forth in the analytical procedure, shall be analyzed to establish a calibration curve. A manufacturer’s factory-set calibration (internal curve) shall be verified with the same number of standards and frequency as a prepared curve. Ref. 15A NCAC 02H .0805 (7) (H) (v). Comment: The laboratory could not provide documentation for the most recent 5-standard calibration curve verification and was unsure of the last date of verification. A Notice of Page 7 #5338 Collins Estates MHP Finding for Immediate Response (NOFIR) was issued so the laboratory could verify the meter calibration is in control more quickly than if waiting to first receive the inspection report to take corrective action. A response due date of October 25, 2021 was negotiated but this deadline was missed due to staffing shortages at the contract laboratory. The laboratory had an acceptable 5-standard calibration curve verification performed by Environmental Chemists, Inc. - Jacksonville (Cert. #1) and the documentation was received November 2, 2021. Please respond with the corrective actions taken to prevent further recurrence of this Finding. P. Finding: The laboratory is not assigning a true value to the gel-type standard. Requirement: Laboratory procedures shall comply with Subparagraph (a)(1) of this Rule. Ref: 15A NCAC 02H .0805 (g) (4). Requirement: Purchased “gel-type” or sealed liquid standards may be used only for daily calibration curve verifications. These standards must have a true value assigned initially and with each subsequent calibration curve generation/verification thereafter. Ref: NC WW/GW LCB Approved Procedure for the Analysis of Total Residual Chlorine (DPD Colorimetric by SM 4500 Cl G-2011). Please submit a copy of the gel verification with the report reply. Requirement: To assign a true value to the gel-type or sealed liquid standard: 1. Zero the instrument with the calibration blank. 2. Read and record gel standard values. 3. Repeat steps 1 and 2 at least two more times. 4. Assign the average value as the true value. R ef: NC WW/GW LCB Approved Procedure for the Analysis of Total Residual Chlorine (DPD Colorimetric by SM 4500 Cl G-2011). Comment: When this is done, these standards may be used after the manufacturer’s expiration date. It is only necessary to assign a true value to the gel-type or sealed liquid standard which falls within the concentration range of the calibration curve used to measure sample concentrations. For example, if you are measuring samples against a low-range calibration curve, a 200 μg/L standard would be verified, and not the 800 μg/L standard since the 800 μg/L standard would be measured using a high-range calibration curve. Comment: The gel/sealed liquid standard true value assignment must be performed for each instrument on which they are to be used. If multiple instruments and/or standard sets are used, each must have assigned true values specific for the instrument and standard set. Documentation must link the gel/sealed liquid standard identification to the meter with which the assigned value was determined. Q. Finding: The laboratory is not analyzing a Method Blank. Requirement: Laboratory procedures shall comply with Subparagraph (a)(1) of this Rule. Ref: 15A NCAC 02H .0805 (g) (4). Requirement: Method Blanks would be required when using laboratory-prepared standards [including Proficiency Testing (PT) Samples] and anytime sample dilutions are performed. Ref: NC WW/GW LCB Approved Procedure for the Analysis of Total Residual Chlorine (DPD Colorimetric by SM 4500 Cl G-2011). Comment: The prepared PT Sample is considered a laboratory-prepared standard. Comment: The Method Blank is deionized or distilled water from the same source used to prepare the calibration verification standards or the PT Sample, and is analyzed like a Page 8 #5338 Collins Estates MHP sample (i.e., with DPD/buffer added). The concentration of the Method Blank must not exceed 50% of the reporting limit (i.e., the lowest calibration verification standard concentration) or corrective action must be taken. Dissolved Oxygen – Standard Methods 4500 O G-2011 (Aqueous) R. Finding: The laboratory is not calibrating prior to sample analysis at each sample site or performing a Post-Analysis Calibration Verification when analyses are performed at multiple sample sites. Requirement: Laboratory procedures shall comply with Subparagraph (a)(1) of this Rule. Ref: 15A NCAC 02H .0805 (g) (4). Requirement: When performing DO analyses at multiple sample sites, a post-analysis calibration verification Standard 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 theoretical DO). Ref: NC WW/GW LCB Approved Procedure for the Analysis of Dissolved Oxygen (DO). pH – Standard Methods 4500 H+B-2011(Aqueous) S. Finding: The laboratory does not have a properly functioning pH meter. Requirement: Each facility shall have glassware, chemicals, supplies, equipment, and a source of water that meets the criteria of the approved methodologies. Ref: 15A NCAC 02H .0805 (g) (6). Comment: The laboratory’s pH meter has not been functional for several mont hs. The analyst is currently borrowing a pH meter from A-1 cleaners (lab certification #5682) to analyze Compliance Samples. T. Finding: Values were reported that exceed the method specified accuracy of 0.1 pH units. Requirement: By careful use of a laboratory pH meter with good electrodes, a precision of ±0.02 unit and an accuracy of ±0.05 unit can be achieved. However, ± 0.1 pH unit represents the limit of accuracy under normal conditions, especially for measurement of water and poorly buffered solutions. For this reason, report pH values to the nearest 0.1 pH unit. Ref: Standard Methods, 4500 H+ B-2011. (6). Comment: pH was reported to 2 decimal places on the eDMR for Permit #NC036676 on January 25, February 8, February 22, March 8, and March 22, 2021. Page 9 #5338 Collins Estates MHP Comment: Per PT Vendor instructions, the PT Sample results should be reported to two decimal places. U. Finding: The acceptance criterion for the check standard buffer is not being assessed. Requirement: All laboratories shall use printable laboratory benchsheets. Certified Data shall be traceable to the associated sample analyses and shall consist of: the quality control assessments. Ref: 15A NCAC 02H .0805 (g) (2) (O). Comment: The laboratory is documenting the check standard buffer but not assessing whether the value is acceptable. NC WW/GW LCB requires the check standard buffers to read within ±0.1 S.U. of the true value to be acceptable. There were no instances observed in the data reviewed where the check buffer exceeded the acceptance criterion. Reporting V. Finding: The laboratory does not report all characteristics of the pollutants analyzed from permitted locations. Requirement: If the Permittee monitors any pollutant more frequently than required by this permit using test procedures approved under 40 CFR Part 136 and at a sampling location specified in this permit or other appropriate instrument governing the discharge, the results of such monitoring shall be included in the calculation and reporting of the data submitted on the DMR. Ref: Standard Conditions for NPDES Permits, Rev. 11/09/2011, Section (E) (5) (b). Comment: Data from the contract laboratory for March 25, 2021 was not reported on the DMR. See the Paper Trail summary table for details. IV. PAPER TRAIL INVESTIGATION: The paper trail consisted of comparing original records (e.g., laboratory benchsheets, logbooks, etc.) and contract laboratory reports to DMRs submitted to the North Carolina Division of Water Resources. Data were reviewed for Collins Estates MHP (NPDES permit # NC0036676) for January, February and March 2021. The following errors were noted: Date Parameter Location Value on Benchsheet *Contract Laboratory Data Value on DMR 1/4/2021 Temperature Effluent 14°C 12°C 2/1/2021 Dissolved Oxygen Effluent 8.00 mg/L No value reported 2/2/2021 Dissolved Oxygen Effluent No value 8.00 mg/L 2/1/2021 Dissolved Oxygen Downstream No value 7.98 mg/L 2/1/2021 Temperature Downstream No value 8°C 2/1/2021 Dissolved Oxygen Upstream No value 8.01 mg/L 2/1/2021 Temperature Upstream No value 8°C 2/15/2021 Dissolved Oxygen Upstream 8.11 mg/L 8.20 mg/L 2/24/2021 Total Residual Chlorine Effluent 10 µg/L 12 µg/L 3/25/2021 Residue, Suspended Effluent *10.4 mg/L No value reported 3/25/2021 Fecal Coliform Effluent *<2 MPN/100 mL No value reported 3/25/2021 Ammonia Nitrogen Effluent *2.3 mg/L No value reported 3/25/2021 BOD Effluent *8 mg/L No value reported Page 10 #5338 Collins Estates MHP To avoid questions of legality, it is recommended that you contact the appropriate Regional Office for guidance as to whether an amended DMR(s) will be required. A copy of this report will be made available to the Regional Office. V. CONCLUSIONS: Correcting the above-cited Findings will help this laboratory to produce quality data and meet Certification requirements. The inspector would like to thank the staff for their assistance during the inspection and data review process. Please respond to all Findings and include supporting documentation, implementation dates and steps taken to prevent recurrence for each corrective action. Report prepared by: Jill Puff Date: October 21, 2021 Report reviewed by: Michael Cumbus Date: October 22, 2021 Certificate Number:5338 Effective Date:1/1/2021 Expiration Date:12/31/2021 Lab Name:Collins Estates MHP Address:1138 Rocky Run Rd. - Apt. 2 Midway Park, NC 28544 North Carolina Wastewater/Groundwater Laboratory Certification Certified Parameters Listing Date of Last Amendment:10/11/2019 The above named laboratory, having duly met the requirements of 15A NCAC 2H.0800, is hereby certified for the measurement of the parameters listed below. CERTIFIED PARAMETERS INORGANIC CHLORINE, TOTAL RESIDUAL SM 4500 Cl G-2011 (Aqueous) DISSOLVED OXYGEN SM 4500 O G-2011 (Aqueous) pH SM 4500 H+B-2011 (Aqueous) TEMPERATURE SM 2550 B-2010 (Aqueous) This certification requires maintance of an acceptable quality assurance program, use of approved methodology, and satisfactory performance on evaluation samples. Laboratories are subject to civil penalties and/or decertification for infractions as set forth in 15A NCAC 2H.0807.