Astm D 4823 – 95 (Reapproved 2003)e1 pdf free download

Standard Guide for
Core Sampling Submerged, Unconsolidated Sediments1

This standard is issued under the fixed designation D 4823; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This guide covers core-sampling terminology, advantages, and disadvantages of different types of core samplers,
core-distortions that may occur during sampling, techniques
for detecting and minimizing core distortions, and methods for
dissecting and preserving sediment cores.

1.2 In this guide, sampling procedures and equipment are
divided into the following categories based on water depth:
sampling in depths shallower than 0.5 m, sampling in depths
between 0.5 m and 10 m, and sampling in depths exceeding 10
m. Each category is divided into two sections: equipment for
collecting short cores and equipment for collecting long cores.

1.3 This guide emphasizes general principles. Only in a few
instances are step-by-step instructions given. Because core
sampling is a field-based operation, methods and equipment
must usually be modified to suit local conditions. This modification process requires two essential ingredients: operator
skill and judgment. Neither can be replaced by written rules.

1.4 Drawings of samplers are included to show sizes and
proportions. These samplers are offered primarily as examples
(or generic representations) of equipment that can be purchased
commercially or built from plans in technical journals.

1.5 This guide is a brief summary of published scientific
articles and engineering reports. These references are listed in
this guide. These documents provide operational details that
are not given in this guide but are nevertheless essential to the
successful planning and completion of core sampling projects.

1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific
warning statements, see 6.3 and 11.5.

2. Referenced Documents

2.1 ASTM Standards:
D 420 Guide to Site Characterization for Engineering, De

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