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N.C. Department of Environment and Natural Resources

NC Department of Environment and Natural Resources
Water Quality - Sample Submission Procedures

Water Quality

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  • 2013 Sample Restriction Calendars
  • Purpose of these Documents and Forms
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Sample Submission Guidance & Documents

The DWR Chemistry Laboratory (Water Ssciences Section) Sample Submission Guidance Document is designed to provide a uniform set of procedures for sample submission to the NC DENR/DWR Chemistry Laboratory. The protocols outlined in this document are applicable to parties responsible for the collection, handling, field screening, documentation, packaging, shipping and receipt of samples. Efforts to improve current procedures will continue and this document will be revised, as needs dictate. Similar procedures should be followed when submitting samples to the DWR laboratory located in the Asheville Regional Office.

  • Click here to download a printable version of the NC DWR Chemistry Laboratory's Sample Submission Guidance Document

Sample Collection, Preservation, and Submittal - Documents:

Field Sheets and Chain-of-Custody Forms - for Sample Collection & Submittal

Surface Water Samples - Preservation and Hold Time Table

Ground Water and UST Samples - Preservation and Hold Time Table

Sample Preservation Guidance

VOA Labeling Guidance

VOA Trip Blanks *Updated 1/17/2014*

Sample Submittal - Contacts and Notification 

 Time-Sensitive Samples: Submittal Guidance & Restrictions

The following guidance is provided regarding sample submission for time-sensitive parameters to the Central Laboratory in Raleigh:

Submitting Samples for Time-Sensitive Parameters  

Prior to submitting samples for the parameters listed in the table below, please read this document and the Sample Submission Restriction Calendars (see below):

Biochemical Oxygen Demand - 5 day (BOD5)  MBAS (Methylene Blue Active Surfactants)
Chlorophyll a  Nitrite (NO2)
Coliform - Total and Fecal by Membrane Filtration (MF)  Orthophosphate (PO4)
Color - ADMI and Platinum Cobalt (PtCo)  Turbidity
Hexavalent Chromium (Cr VI)  

 

2014 Sample Submission Restriction Calendars

Note: These calendars outline submittal restrictions for each state holiday.

Purpose of these Documents and Forms:

The primary goal of these documents is to promote the use of procedures that will ensure that data reported by the laboratory is accurate as well as legally and technically sound. Errors in environmental analysis can result from incorrect sampling handling or lack of supporting documentation.

Factors that may ultimately affect the integrity of reported analytical data include:

  • Obtaining a representative sample;
  • Preventing contamination of the sample;
  • Proper preservation of the collected sample and attention to sample hold times (to protect the sample from chemical, physical or biological changes prior to analysis);
  • Providing legal documentation of the sampling event, and if necessary chain-of-custody

The DWR Chemistry Laboratory is committed to providing high quality data and excellent service in environmental analysis. To ensure that the results produced and reported meet the requirements of the data users and comply with state and federal regulations, a quality management system must be implemented that is clear, effective, well-communicated, and supported at all levels of the Division of Water Resources.

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