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Home My WebLink About#5316 10-final INSPECTION REPORT ROUTING SHEET To be attached to all inspection reports in-house only. Laboratory Cert. #: 5316 Laboratory Name: Dennis Wilson Inspection Type: Field Maintenance Inspector Name(s): Jeffrey R. Adams Inspection Date: April 23, 2010 Date Report Completed: May 6, 2010 Date Forwarded to Reviewer: May 6, 2010 Reviewed by: Tonja Springer Date Review Completed: May 7, 2010________ Cover Letter to use: Insp. Initial X Insp. Reg. Insp. No Finding Insp. CP Unit Supervisor: Dana Satterwhite Date Received: May 10, 2010 Date Forwarded to Alberta: May 10, 2010 Date Mailed: May 10, 2010 _____________________________________________________________________ On-Site Inspection Report LABORATORY NAME: Dennis Wilson NPDES PERMIT #: NC0048631; NC0047279 ADDRESS: P.O. Box 112 Oxford, NC 27565 CERTIFICATE #: 5316 DATE OF INSPECTION: April 23, 2010 TYPE OF INSPECTION: Field Maintenance AUDITOR(S): Jeffrey R. Adams LOCAL PERSON(S) CONTACTED: Dennis Wilson I. INTRODUCTION: This laboratory was inspected to verify its compliance with the requirements of 15A NCAC 2H .0800 for the analysis of environmental samples. II. GENERAL COMMENTS: The laboratory was neat and equipment well maintained. Records were maintained and well organized, however, some quality control procedures need to be implemented. The laboratory was given a packet containing the Field Technical Assistance Documents and Quality Control requirements for all field parameters during the inspection. Finding A is a new policy that has been implemented by our program since the last inspection. III. FINDINGS, REQUIREMENTS, COMMENTS AND RECOMMENDATIONS: Total Residual Chlorine – Standard Methods, 18th Edition, 4500 Cl G pH – Standard Methods, 18th Edition, 4500 H+ B A. Finding: The laboratory needs to increase the documentation of materials and reagents used or made in the laboratory. Requirement: All chemicals, reagents, standards and consumables used by the laboratory must have the following information documented: Date Received, Date Opened (in use), Vendor, Lot Number, and Expiration Date. A system (e.g., traceable identifiers) must be in place that links standard/reagent preparation information to analytical batches in which the solutions are used. Documentation of solution preparation must include the analyst’s initials, date of preparation, the volume or weight of standard(s) used, the solvent and final volume of the solution. This information as well as the vendor and/or manufacturer, lot number, and expiration date must be retained for chemicals, reagents, standards and consumables used for a period of five years. Consumable materials such as pH buffers, lots of pre-made standards are included in this requirement. Ref: North Carolina Wastewater/Groundwater Laboratory Certification document, Quality Assurance Policies for Field Laboratories. Page 2 #5316 Dennis Wilson Comment: The DPD and Buffer reagents, for the Total Residual Chlorine test, were contained in a zip lock type plastic bag and their original containers and packaging had been disposed of. There was no lot number or expiration date documented, making it impossible to discern traceability of the reagents being used. Comment: The traceability information such as lot numbers can be documented on the field benchsheet. Attached is an example benchsheet that illustrates how this can be done on the benchsheet. IV. PAPER TRAIL INVESTIGATION: The paper trail consisted of comparing contract lab reports to Discharge Monitoring Reports (DMRs) submitted to the North Carolina Division of Water Quality. Data were reviewed for the following facilities: Heritage Meadows WWTP (NPDES permit #NC0047279) and Long Creek Court WWTP (NPDES permit #NC0048631) for December, 2009, January and February, 2010. The following errors were noted: Date Parameter Location Long Creek Court Value on Benchsheet *Contract Data Value on DMR 12/21/09 *Total Suspended Solids Effluent 10 mg/L 1.0 mg/L Date Parameter Location Heritage Meadows Value on Benchsheet Value on DMR 1/18/10 Temperature Effluent 18 °C 17 °C 1/20/10 Temperature Effluent 14 °C 17 °C 1/21/10 Temperature Effluent 15 °C 14 °C 1/22/10 Temperature Effluent 15 °C 14 °C In order to avoid questions of legality, it is recommended that the laboratory contact the appropriate Regional Office for guidance as to whether an amended Discharge Monitoring Report will be required. A copy of this report will be forwarded to the Regional Office. V. CONCLUSIONS: Correcting the above-cited finding will help this lab to produce quality data and meet certification requirements. The inspector would like to thank the staff for its assistance in the inspection and data review process. Please respond to all findings. Report prepared by: Jeffrey R. Adams Date: May 6, 2010 Report reviewed by: Tonja Springer Date: May 7, 2010 Certification # _______ Date: ______________________________ Facility Name: _________________________________ Analyst: ___________________________ Permit #: ______________________________________ pH Analysis Reference Method: (include edition e.g., SM 18th) Cal. Time Calibration Buffer 4.0 s.u. Calibration Buffer 10.0 s.u. *Check Buffer 7.0 s.u. Comments *pH buffer checks are to be within  0.1 pH units of the standards true value 4 s.u. buffer Lot#/identifier: 7 s.u. buffer Lot#/identifier: 10 s.u. buffer Lot#/identifier: Facility/Sample location Time Sampled Time Analyzed Temp (ºC) ■ pH Result, s.u. ►Buffer Check value Comment If sample is measured directly in the stream, only time analyzed would be recorded, but a statement that samples are measured in situ should be added to the benchsheet for clarification. ►Indicates a recommended drift check. (Use Buffer 7.0. Should be within ± 0.1 units of the buffer’s true value.) ■ Document the temperature of the sample at the time of analysis. Note: This temperature is not to be used for reporting on the monthly monitoring report. Calibration drift check is recommended when performing analyses at multiple sampling locations. *All pH results in pH units (i.e., s.u.). Annual Temperature Sensor Verification date: Total Residual Chlorine (TRC) Reference Method: (include edition) Facility/Sample Location Time Sampled Time Analyzed TRC Result ug/L or mg/L Daily check standard obtained value ug/L or mg/L Comment TRC check standard obtained true value (acceptance range mg/L) (Should recover within ±10% of the check standard’s obtained true value) Check/Gel Standard Lot#/identifier: __________ Annual Curve Verification date: _________________________ Dissolved Oxygen (DO) Reference Method: (include edition) Temperature C Adjusted Air Calibration▲ (% or mg/L) Calibration Time Facility/Sample Location DO reading mg/L *Time Analyzed/Time Sampled Comments ▲Based on appropriate altitude adjustment  When performing analyses at multiple sampling locations, re-calibration(s) should be performed every four hours. *Analysis time and sampling time the same. (Ideally the sample should be analyzed in situ). Annual Temperature Sensor Verification date: ____ Temperature Reference Method: (include edition) Facility/Sample Location Temperature C *Time Analyzed/Time Sampled Comments *Analysis time and sampling time the same. (Ideally the sample should be analyzed in situ). Annual Temperature Sensor Verification date: Field Personnel Notes 12/29/2009