An appropriately developed, documented, and executed guide is essential for the proper collection and application of caliper logs. This guide is to be used in conjunction with Guide D 5753.

The benefits of its use include the following: improving selection of caliper logging methods and equipment, caliper log quality and reliability, and usefulness of the caliper log data for subsequent display and interpretation.

This guide applies to commonly used caliper logging methods for geotechnical applications.

It is essential that personnel (see the Personnel section of Guide D 5753) consult up-to-date textbooks and reports on the caliper technique, application, and interpretation methods.

1.1 This guide covers the general procedures necessary to conduct caliper logging of boreholes, wells, access tubes, caissons, or shafts (hereinafter referred as boreholes) as commonly applied to geologic, engineering, ground-water and environmental (hereinafter eeferred as geotechnical) investigations. Caliper logging for mineral or petroleum exploration and development are excluded.