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N.C. Department of Environment and Natural Resources

NC Department of Environment and Natural Resources
Water Quality - Policies

Water Quality

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Policies

Municipal, Industrial, Commercial and Other Laboratories

The following section provides a list of interpretive rules and policy statements issued by the NC WW/GW Laboratory Certification program. 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 LC program 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 LC policy requirement. 

Classification Parameter Policy  Revision Date
          
General Quality Control QC  Error Corrections      11/30/2007 
    Servicing Analytical Balances     12/22/2007
    Calibration Verification for Colorimetric, Ion Electrode and Metals Analyses    2  02/18/2014
    Weight Verification      05/23/2008
    Infrared (IR) Thermometer Calibration Verification    3  06/18/2012
    Second Source Standards   1  07/08/2010
    Matrix Spiking - also refer to the Technical Assistance document by clicking here.  3  05/11/2012
    Traceability of Chemicals, Reagents, Standards and Materials   1  12/10/2009
    Electrode Slope/Efficiency Documentation      10/02/2013
    Qualifying Data    1  04/06/2011
    Chemical, Reagent and Consumable Expiration Dates      01/07/2009
    Correlation Coefficient for Linear Calibration Curves      01/07/2009
    Pipettor Calibration      03/25/2009
    Analyzing PT Samples in the Same Manner as Environmental Samples   3  05/31/2011
    Manual Integration     04/09/2010
    Electronic Data Storage, Signature and Reporting Policy     04/09/2010
    Blank Acceptance Criterion   2  02/17/2014
    Preservation and Hold Time Memo     06/20/2007
    In-line Meter Calibration/Verification     01/01/2006
    Standardization of Titrants (removed - covered by MUR)     08/10/1998
    Required Documentation for Preservation and Hold Time     07/07/2014
          
Inorganic Parameters TRC  Total Residual Chlorine - Sealed Standards in a Field Setting      12/22/2007
  BOD Flagging QC Failures in BOD Data   4  08/26/2014
    BOD - Checking DO Meter for Drift
     07/09/2012
    Seed Correction Factor Acceptance Criterion     04/24/2013
    Measuring BOD/CBOD Sample Volumes     04/15/2013
    Reporting Limit Policy     04/24/2013
  CBOD CBOD GGA Standard Acceptance Criterion   2 11/04/2013
    Seed Correction Factor Acceptance Criterion     04/24/2013
    Measuring BOD/CBOD Sample Volumes     04/15/2013
    Reporting Limit Policy     04/24/2013
  Residue TSS Reporting Limit     08/25/2008
    TSS Blank Initial Constant Weight   2  07/03/2014
    TS and TDS Reporting Limit      10/21/2009
    TSS, TDS and TS Constant Weight/Drying Time Verification     03/09/2009
  NH3 Ammonia and Fluoride Distillation Study Requirements     01/15/2009
  COND Automatic Temperature Compensator (ATC) Verification     02/01/2006
  BACTI Quanti-Tray Sealer Check   2 07/02/2013

 

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