Presentation on theme: "Field Analysis Quality Control"— Presentation transcript:
1Field Analysis Quality Control Presentation to: KWWOAApril 16, 2013Department for Environmental Protection Energy & Environment CabinetTo Protect and Enhance Kentucky’s Environment
2Scope of Field Methods pH Conductivity Dissolved Oxygen (DO) Turbidity Total Residual Chlorine (TRC)TemperatureFlow
3Legal DefensibilityLegal Defensibility: Compliance monitoring data shall be made legally defensible by keeping thorough and accurate records. The Laboratory Quality Assurance Plan and/or SOPs shall describe the policies and procedures used by the facility for record integrity, retention, and storage.Chain of custody procedures shall be utilized.
4Reference Methods 40 CFR 136.3 – list of EPA approved methods 40 CFR & – ATP Procedures40 CFR – Method ModificationEPA Method Modification Rule (5/18/2012)SM Reference Nomenclature 4500-H+ B-2000Use QC from SM 20th, 21st or 22nd Ed. onlySM 22nd Ed. has useful QC (e.g. 2020B)
5Field QA/QC Objectives QA/QC systems and procedures are employed to ensure that environmental results are of a known quality and meet their intended use (compared to data quality objectives; DQOs).
640 CFR 136.7 Demonstration of Capability (DOC). Method Detection Limit (MDL).Laboratory Reagent (method) Blank (LRB).Laboratory Fortified Blank (LFB), also referred to as a spiked blank or laboratory control sample (LCS).Matrix spike (MS), matrix spike duplicate (MSD) or laboratory fortified blank duplicate (LFBD) for suspected difficult matrices.
740 CFR (cont)Internal standards, surrogate standards (for organic analysis) or tracers (for RADS).Calibration (initial and continuing), initial and continuing performance (ICP) solutions also referred to as initial calibration verification (ICV) and continuing calibration verification (CCV).Control Charts (or other trend analyses of quality control results).
8All QC elements must be addressed 40 CFR (cont)Corrective Actions (root cause analyses).QC acceptance criteria.Definitions of a batch (preparation and analytical.Specify a minimum frequency for conducting the QC checks.All QC elements must be addressedin the QAP/SOP
9Quality AssuranceAn integrated system of management activities involving planning, implementation, documentation, assessment, reporting, and quality improvement to ensure that a process, item, or service is of the type and quality needed and expected by the client (intended use).
10Quality Assurance Criteria QAP/SOPCalibration proceduresCalibration verification – 2nd source standardQuality control samples (QCS)Equipment Logs / Field NotebooksField personnel trainingAnnual Performance Test StudyDemonstration of Capability (DOC)Chain-of-Custody (C-O-C)
11EPA Quality StandardEPA Quality Standard for Environmental Data Collection, Production, and Use by non-EPA (External) Organizations (CIO Standard 2106-S-02) – DRAFTReplaces QA/R-2 – QMPsReplaces QA/R-5 – QAPPsCIO Guidance 2106-G-05 QMP (Draft)Handbook for Developing QAPPs (Draft)
12Equipment Log / Field Notebook Manufacturer, model and serial numberSignificant modificationsRepair and maintenance historyCalibration history (where relevant)Performance historyCalibrationDaily calibration / verification informationField activities
13Performance Test Study Perform an annual PT Study for:pHConductivityTurbidityTotal Residual ChlorineDOW must receive a copy of the PT Study sent directly from the providerTwo consecutive failures – submit a corrective action plan to DOW
14Demonstration of Capability Perform DOC annually using the field method as written in the QAP/SOPDocument DOC resultsDOC template for DOC results are provided on the DOW wastewater websiteFour (4) replicates (+20% of their mean)Percent relative standard deviation <15%
15Chain of CustodyType of sample (e.g. grab, composite, split sample, etc)Sample matrixType of container (e.g. glass, plastic)Required sample volumeSample holding timesPreservative requiredField quality control
16Quality ControlThe overall system of technical activities that measure the attributes and performance of a process, item, or service against defined standards to verify that they meet the stated requirements established by the customer; operational techniques and activities that are used to fulfill requirements for quality.
17Quality Control Criteria Blanks (reagent, field, equipment, etc)Accuracy (Bias)PrecisionEstablish frequency of QC sample analysisUtilize acceptance criteriaDocument corrective action
18Calibrate the instrument with 4.0, 7.0, and 10.0 S.U. buffer pH MeasurementsCalibrate the instrument with 4.0, 7.0, and 10.0 S.U. bufferRecord slope ( )Verify calibration with a 7.0 S.U. (mid-level) 2nd source buffer (+0.1 S.U.)RECORD CALIBRATION INFORMATIONSample duplicate (one/twenty samples)%Difference ~ +20%
19Conductivity Measurements Calibrate instrument using known conductivity standards as per manufacturerVerify calibration using a 2nd source standardRECORD CALIBRATION INFORMATIONReagent blank (one/batch)Result > detection limit = corrective actionSample duplicate (one/twenty samples)%Difference ~ +20%
20Dissolved Oxygen Measurements Calibrate instrument as per manufacturerRECORD CALIBRATION INFORMATIONMeasure environmental samplesSample duplicate (one/twenty samples)%Difference ~ +20%At new location where altitude may have changed the DO meter must be re-calibrated
21Turbidity Measurements Calibrate instrument as per manufacturer3 points minimumVerify calibration using a 2nd source standardRECORD CALIBRATION INFORMATIONReagent blank (one/batch)Result > detection limit = corrective actionSample duplicate (one/twenty samples)%Difference ~ +20%
22Total Residual Chlorine (TRC) Calibrate/verify instrument as per manufacturerVerify calibration using a 2nd source standardRECORD CALIBRATION INFORMATIONReagent blank (one/batch)Result > detection limit = corrective actionSample duplicate (one/twenty samples)%Difference ~ +20%
23Temperature Measurements Calibrate instrument as per manufacturerApply NIST Correction FactorRECORD CALIBRATION INFORMATIONMeasure environmental samplesSample duplicate (one/twenty samples)%Difference ~ +20%
24Flow Measurements Document device used to make flow measurements Record all information used to calculate flow, including unitsShow calculation used to determine flow