ASTM International

Standard Practice for Using the Electronic Piezocone Penetrometer Tests for Environmental Site Characterization
 N D6067

Annotation

The electronic cone penetrometer test often is used to determine subsurface stratigraphy for geotechnical and environmental site characterization purposes (1).2 The geotechnical application of the electronic cone penetrometer test is discussed in detail in Test Method D5778, however, the use of the electronic cone penetrometer test in environmental site characterization applications involves further considerations that are not discussed. For environmental site characterization, it is highly recommended to use the Piezocone (PCPT or CPTu) option in Test Method D5778 so information on hydraulic conductivity and aquifer hydrostatic pressures can be evaluated.

The purpose of this practice is to discuss aspects of the electronic cone penetrometer test that need to be considered when performing tests for environmental site characterization purposes.

The electronic cone penetrometer test for environmental site characterization projects often requires steam cleaning the push rods and grouting the hole. There are numerous ways of cleaning and grouting depending on the scope of the project, local regulations, and corporate preferences. It is beyond the scope of this practice to discuss all of these methods in detail. A detailed explanation of grouting procedures is discussed in Guide D6001.

The electronic cone penetrometer may be be combined with other direct push sampling and testing methods. Estimated soil types can be confirmed by soil sampling (Guide D6282). Cone penetrometer tests are often used to locate aquifers for installation of wells (Practice D5092, Guide D6274). Cone penetrometers can be equipped with additional sensors for ground water quality evaluations (Practice D6187). Location of other sensors must conform to requirements of Test Method D5778.