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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  2  10/30/2014
    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
    Neutralizing Total Residual Chlorine in BOD Samples   10/30/2014
  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  2  09/25/2014
    TSS Blank Initial Constant Weight  2  07/03/2014
    TS and TDS Reporting Limit   2  09/29/2014
    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

    Fecal Colifrom MF Consumables Testing   10/31/2014
    Fecal Coliform Reporting   10/30/2014

 

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