Policies

The following table provides a list of interpretive rules and policy statements issued by the NC WW/GW Laboratory Certification Branch (LCB). They are meant to clarify existing legislative rules or to provide guidance where a rule does not exist. Where multiple editions of a single reference source may be approved for reporting purposes and where these approved methods may have conflicting or unclear requirements, the NC WW/GW LCB may adopt a single policy based on a single edition to provide consistency in analytical reporting. Even when citing an alternate reference edition, laboratories must adhere to the NC WW/GW LCB policy requirement. 
 

Policy names with an asterisk (* ) beside them notate that the policy could be applicable to Field Laboratory certification, depending upon the parameter methods on the laboratory's Certified Parameter Listing

ParameterPolicyRevision
General Quality ControlCorrelation Coefficient for Linear Calibration Curves *2014/12
General Quality ControlElectrode Slope/Efficiency Documentation 2013/10
General Quality ControlElectronic Signature and Data Storage Policy *2020/04
General Quality ControlFactory Set Curve Verification *2018/10
General Quality ControlManual Integration2010/04
General Quality ControlSample Collection, Preservation, Storage and Transport Requirements for Field Labs *2024/09
General Quality ControlSample Collection, Preservation, Storage and Transport Requirements for non-Field Labs 2024/09
General Quality ControlTemperature-Measuring Devices Used for Laboratory Operations Policy *2021/08
General Quality ControlTitrant Standardization *2019/05
General Quality ControlTraceability Documentation Requirements for Chemicals, Reagents, Standards and Consumables *2024/09
General Quality ControlSW-846 Method Implementation2020/07
General Quality ControlAnalytical Balance Weights Verification *2020/04
General Quality ControlMatrix Spike2020/05
General Quality ControlChemical, Reagent, Standard and Consumable Expiration Policy*2022/04
General Quality ControlDuplicate Sample Analyses for Field Parameters Policy*2020/03
General Quality ControlMechanical Volumetric Liquid-Dispensing Devices Calibration Policy*2021/07
General Quality ControlSecond Source Standard2021/09
Ammonia/FluorideDistillation*2024/10
BacteriaQuanti-Tray Sealer Check2022/01
BacteriaFecal Coliform MF Consumables Testing2021/08
BacteriaFecal Coliform MF Reporting2019/05
BacteriaBacteriological Sample Bottle Sterility Test2022/01
BacteriaColiform MF Culture Positive2022/06
BacteriaBacteriological Reagent Water Testing2018/02
BacteriaFecal Sludge MPN Analysis Protocol2021/08
BOD/CBODFlagging QC Failures in BOD Data2021/08
BOD/CBODBOD - Checking DO Meter for Drift2021/08
BOD/CBODReporting Limit Policy2023/08
BOD/CBODNeutralizing Total Residual Chlorine in BOD Samples2021/08
ChlorophyllChlorophyll Sample Collection, Preservation and Holding Time Policy 2025/08
Dissolved OxygenDissolved Oxygen Meter Calibration Policy *2020/04
Free Available ChlorineFAC Hold Time *2019/06
pHSW-846 pH Calibration Verification *2020/02
ResidueTSS Reporting Limit2014/09
ResidueTS and TDS Reporting Limit 2009/03
ResidueMethod Blank Requirement for Residues 2021/07
ResidueAnti-static Device Requirement for Total and Total Dissolved Solids2021/06
ResidueResidue Oven Temperature Documentation2021/07
TurbidityTurbidity Standards *2007/12
TRC Total Residual Chlorine - Sealed Standards in a Field Setting *2017/10
VAROption 3 DO Measurement 2018/09
VAROption 3 Minimum Sample Volume2018/09
VAROption 3 Documentation Requirements2022/06

 

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