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Revising CBP Guidelines for Sampling and Analysis: Key Updates and Rationale

The Chesapeake Bay Program (CBP) is undergoing revisions of its guidelines for analytical methods and quality assurance to enhance monitoring efforts, particularly in nontidal waters. This update addresses the need for documented program requirements, consistent development of participant Standard Operating Procedures (SOPs), and the generation of comparable data among participants. The existing publication is outdated, relying on methods from the mid-1990s. The revisions will include updates on chlorophyll, light attenuation, and CDOM methods, as well as an overhaul of quality management and laboratory QA/QC practices.

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Revising CBP Guidelines for Sampling and Analysis: Key Updates and Rationale

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  1. Status of Revising the CBP Guidelines for Sampling and Analysis Mary Ellen Ley, USGS/Chesapeake Bay Program March 21, 2012

  2. Why Revise CBP Guidance for Analytical Methods and QA? • Expanding Monitoring into Nontidal Waters • Need Documented Program Requirements • Consistent development of Participant SOPs • Comparable data among Participants • Basis of On-site Assessments • The Current Publication is Outdated • Based on tidal estuarine methods • Published in mid 1990’s!

  3. Work Since 1996 Publication • Chlorophyll method – revised, 1999 • Light Attenuation method – new, 2003 • CDOM method – new, 2005 • Chapter IV, Tidal Field Procedures – revised, 3/2008 • Chapter V, Nontidal Field Procedure – revised, 11/2008 • Chapter I, Introduction – revised, 12/2010 • Chapter II, Quality Assurance – draft rev. 1, 3/2012 • Chapter VI, Analytical Methods – draft rev. 1, 3/2012

  4. Chapter II Notes • Changes to “Quality Management” Section: • Moved QAPP & Lab Manual Guidance to Appendix A • Added language from CBPO grant guidance • Procedural Modifications Comparability Studies • DQOs for Field & Lab QC in Tables II.1 & II.3 • Moved Lab-related QC Items to Chapter II, Lab QA

  5. Chapter VI Notes • November and February meetings in Colonial Beach • Section B. Definitions & Terms – new • Section C. Laboratory QA/QC – expanded • Preservation Table VI.1 – added nontidal • Sample Receiving/Storage, Support Equipment and Control Charts – from Ch. 2 • Calibration Requirements – refined, clarified • Outstanding Issues – Refer to Draft

  6. Still Needed for Final Publication • Chapter III. Data Management • Parameter Relationship Chart – species of N, P, C, SS • A New Title? • Other Suggestions?

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