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HomeMy WebLinkAbout#349 11-final INSPECTION REPORT ROUTING SHEET To be attached to all inspection reports in-house only. Laboratory Cert. #: #349 Laboratory Name: Warren County WWTP Laboratory Inspection Type: Municipal Maintenance Inspector Name(s): Jeffrey R. Adams Inspection Date: June 21, 2011 Date Report Completed: June 27, 2011 Date Forwarded to Reviewer: June 27, 2011 Reviewed by: Todd Crawford Date Review Completed: June 28, 2011 Cover Letter to use: Insp. Initial X Insp. Reg. Insp. No Finding Insp. CP ___ Corrected Unit Supervisor: Dana Satterwhite Date Received: July 1, 2011 Date Forwarded to Alberta: July 8, 2011 Date Mailed: July 8, 2011 _____________________________________________________________________ On-Site Inspection Report LABORATORY NAME: Warren County WWTP Laboratory NPDES PERMIT #: NC0020834 ADDRESS: P.O. Box 281 Warrenton, NC 27589 CERTIFICATE #: 349 DATE OF INSPECTION: June 21, 2011 TYPE OF INSPECTION: Municipal Maintenance AUDITOR(S): Jeffrey R. Adams LOCAL PERSON(S) CONTACTED: William Perkinson and Al Alexander 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 clean and well organized. The facility has all the equipment necessary to perform the analyses. The laboratory is doing an exceptional job, maintaining its traceability requirements, however, some quality control procedures need to be implemented. Proficiency testing samples have been analyzed for all certified parameters for the 2010 proficiency testing calendar year and the graded results were 100% acceptable. As a reminder, the 2011 proficiency testing results must be submitted by your vendor and received in the certification laboratory no later than October 31, 2011. The laboratory was given a packet containing North Carolina Laboratory Certification quality control requirements and policy changes during the inspection. III. FINDINGS, REQUIREMENTS, COMMENTS AND RECOMMENDATIONS: Analytical Balance Weights: A. Finding: The analytical balance weights have not been verified against ASTM standard weights. Requirement: ASTM Class 1 and 2 weights must be verified at least every 5 years. ASTM Class 1 weights (20 g to 25 kg) and ASTM Class 2 weights (10 g to 1 mg) are equivalent to the NBS Class S weights specified in 15A NCAC 2H .0805 (a) (7) (K). Ref: North Carolina Wastewater/Groundwater Laboratory Certification Policy. A guidance and technical assistance document on weight verifications was left for the analysts during the inspection. Page 2 #349 Warren County W W TP Laboratory IV. PAPER TRAIL INVESTIGATION: The paper trail consisted of comparing laboratory benchsheets and contract lab reports to Discharge Monitoring Reports (DMRs) submitted to the North Carolina Division of Water Quality. Data were reviewed for the Warren County WWTP (NPDES permit #NC0020834) for February, March and April, 2011. The following errors were noted: Date Parameter Location Value from Contract Data Value on DMR 02/08/11 Ammonia Nitrogen Effluent <0.02 mg/L 0.00 mg/L* 02/15/11 BOD Effluent <2.6 mg/L** <2.0 mg/L *The North Carolina NPDES Permitting and Compliance Section’s, Instructions for Completing a DMR, requires the following: For calculation purposes only, recorded values of less than a detectable limit (< #.##) may be considered to equal zero (0) for all parameters except Fecal Coliform, for which values of "less than" may be considered to be equal to one (1). Values of results which are less than a detectable limit should be reported in the daily cells using the "less than" symbol (<) and the detectable limit used during the testing (or the value with appropriate unit conversion). Please note there is never a case when an average would need to be recorded along with a "less than" symbol. ** A lower detection limit of 2.0 mg/L is established by the method requirement for a minimum DO depletion of 2.0 mg/L. The contract laboratory will be contacted by this office regarding the proper reporting of BOD results. In order to avoid questions of legality, it is recommended that you contact the appropriate Regiona l 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 during the inspection and data review process. Please respond to all findings. Report prepared by: Jeffrey R. Adams Date: June 27, 2011 Report reviewed by: Todd Crawford Date: June 28, 2011