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Re-Evaluation of Applicability of Agency Sample Holding Times

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Abstract:The Purpose and Rationale is to:

To assess the validity of currently recognized holding times and to provide a scientific basis for changes tha may be necessary to the current regulations.

While holding times may appear adequate to protect sample integrity and provide sufficient time for laboratory analysis, relevant data is sparse on individually defined holding times and, thus, some of the holding times appear to be arbitrary and/or politically driven.

When holding times are exceeded, even if only by 1 day, the data must be flagged and are often declared invalid or are reported as "estimated", and the data are then called into question, especially if the data are to be used in a court of law.
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Citation:Schumacher, B. A. Re-Evaluation of Applicability of Agency Sample Holding Times. Presented at Biological Advisory Committee - Research Methods Symposium, Newport, RI, October 14 - 15, 2003EPA/600/A-03/209.
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Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
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Division: Environmental Sciences Division
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Branch: Characterization & Monitoring Branch
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Product Type: EPA Proceed
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Presented: 10/14/2003
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Downloads:
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Bullet Item Re-Evaluation of Applicability of Agency Sample Holding Times
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Related Entries:
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Bullet Item Soil and Sediment Sampling Methods
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