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 *12/2014
General Quality ControlElectrode Slope/Efficiency Documentation 10/2013
General Quality ControlElectronic Signature and Data Storage Policy *4/2020
General Quality ControlFactory Set Curve Verification *10/2018
General Quality ControlManual Integration4/2010
General Quality ControlSample Collection, Preservation, Storage and Transport Requirements for Field Labs *9/2024
General Quality ControlSample Collection, Preservation, Storage and Transport Requirements for non-Field Labs 9/2024
General Quality ControlTemperature-Measuring Devices Used for Laboratory Operations Policy *8/2021
General Quality ControlTitrant Standardization *5/2019
General Quality ControlTraceability Documentation Requirements for Chemicals, Reagents, Standards and Consumables *9/2024
General Quality ControlSW-846 Method Implementation7/2020
General Quality ControlAnalytical Balance Weights Verification *4/2020
General Quality ControlMatrix Spike5/2020
General Quality ControlChemical, Reagent, Standard and Consumable Expiration Policy*4/2022
General Quality ControlDuplicate Sample Analyses for Field Parameters Policy*3/2020
General Quality ControlMechanical Volumetric Liquid-Dispensing Devices Calibration Policy*7/2021
General Quality ControlSecond Source Standard9/2021
Ammonia/FluorideDistillation*10/2024
BacteriaQuanti-Tray Sealer Check1/2022
BacteriaFecal Coliform MF Consumables Testing8/2021
BacteriaFecal Coliform MF Reporting5/2019
BacteriaBacteriological Sample Bottle Sterility Test1/2022
BacteriaColiform MF Culture Positive6/2022
BacteriaBacteriological Reagent Water Testing2/2018
BacteriaFecal Sludge MPN Analysis Protocol8/2021
BOD/CBODFlagging QC Failures in BOD Data8/2021
BOD/CBODBOD - Checking DO Meter for Drift8/2021
BOD/CBODReporting Limit Policy8/2023
BOD/CBODNeutralizing Total Residual Chlorine in BOD Samples8/2021
ChlorophyllChlorophyll Sample Collection, Preservation and Holding Time Policy 2/2020
Dissolved OxygenDissolved Oxygen Meter Calibration Policy *4/2020
Free Available ChlorineFAC Hold Time *6/2019
pHSW-846 pH Calibration Verification *2/2020
ResidueTSS Reporting Limit9/2014
ResidueTS and TDS Reporting Limit 3/2009
ResidueMethod Blank Requirement for Residues 7/2021
ResidueAnti-static Device Requirement for Total and Total Dissolved Solids6/2021
ResidueResidue Oven Temperature Documentation7/2021
TurbidityTurbidity Standards *12/2007
TRC Total Residual Chlorine - Sealed Standards in a Field Setting *10/2017
VAROption 3 DO Measurement 9/2018
VAROption 3 Minimum Sample Volume9/2018
VAROption 3 Documentation Requirements6/2022

 

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