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Interim Guidance for Nontidal Network (NTN) WY2013 Field Blank and Duplicate Sample Collection

INTERIM GUIDANCE FOR NONTIDAL NETWORK WY2013 FIELD BLANK AND DUPLICATE SAMPLE COLLECTION
Draft ­ Jan. 28, 2013

The Nontidal Data Upload and Evaluation Tool (DUET) will include pre‐programmed subroutines to generate
statistical measures of the completeness, precision and bias of nontidal network (NTN) monitoring data. These
statistics will enhance the ability of end users to comprehend, use and defend the data.

Programming for the required or “expected” number and types of water quality (WQ) and quality control
(QC) samples, as originally determined by the Nontidal Workgroup, has been difficult due to: 1)
insufficient detail in the guidance and 2) implementation differences among agencies, such as the
collection of additional WQ samples and different types of QC samples.

Therefore, the following “interim” guidance is intended to overcome these difficulties for the collection
and reporting of WY2013 nontidal data.