1.1 This practice covers the procedures for obtaining qualitative or quantitative samples of macroinvertebrates inhabiting sand, clay, mud, gravel, and similar substrates.

1.2 This device is used in marine and estuarine waters and is adaptable for large rivers.

1.3 For advantages and limitations for grab sampling devices, see Guide D4387.

1.4 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability or regulatory limitations prior to use. For specific precautions, see Section 5.