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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   1  04/09/2010
    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     01/07/2009
    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    06/09/2010
    Preservation and Hold Time Memo    06/20/2007
    In-line Meter Calibration/Verification    01/01/2006
         
Inorganic Parameters TRC  Total Residual Chlorine - Sealed Standards in a Field Setting     12/22/2007
  BOD Flagging QC Failures in BOD Data  2  06/02/2011
    BOD - Adding Extra Nutrients    10/23/2009
    BOD - Sample pH Adjustment    04/09/2010
    BOD - Checking DO Meter for Drift
    07/09/2012
  CBOD CBOD GGA Standard Acceptance Criterion   05/27/2011
  Residue TSS Reporting Limit    08/25/2008
    TSS Blank Initial Constant Weight
    03/09/2009
    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   05/31/2011

 
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