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ASTM D3370-10

Historical Revision

Standard Practices for Sampling Water from Flowing Process Streams

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1.1 These practices cover the equipment and methods for sampling water from closed conduits such as process streams at power stations for chemical, physical, microbiological, and radiological analyses. It does not cover specialized equipment required for and unique to a specific test or method of analysis. The following are included:


The goal of sampling is to obtain for analysis a portion of the main body of water that is representative. The most critical factors necessary to achieve this are points of sampling, and materials selection, system design, time of sampling, frequency of sampling, and proper procedures to maintain the integrity of the sample prior to analysis.

Homogeneity of the process to be sampled is frequently lacking, necessitating multiple-point sampling. If it is impractical to utilize a most-representative sampling point, it may be practical to determine and understand interrelationships so that results obtained at a minimum number of points may be used to characterize the system.

Samples collected from a single point in a system are always recognized as being non-representative to some degree. For this reason, total representativeness of samples cannot be a prerequisite to the selection of a sampling point. The degree of representativeness of the sample shall be assessed and the assessment made a part of the permanent record. This will prevent an artificial degree of accuracy from being assigned to the data derived from tests on the sample.

The samples shall be of sufficient volume and shall be taken frequently enough to permit reproducibility of testing requisite for the desired objective, as required by the method of analysis to be used.

Laboratories or facilities conducting water sampling should be in compliance with Guide D3856.

SDO ASTM: ASTM International
Document Number D3370
Publication Date Dec. 1, 2010
Language en - English
Page Count 11
Revision Level 10
Supercedes
Committee D19.03
Publish Date Document Id Type View
Jan. 1, 2025 D3370-25 Revision
Dec. 15, 2018 D3370-18 Revision
Dec. 1, 2010 D3370-10 Revision
Oct. 1, 2008 D3370-08 Revision
Dec. 1, 2007 D3370-07 Revision
June 10, 1999 D3370-95AR99E01 Revision
Not Available D3370-76 Revision
Sept. 10, 1995 D3370-95AR03E01 Reaffirmation