1.1 This practice covers the procedures for obtaining a qualitative or quantitative sample of macroinvertebrates inhabiting a wide range of bottom substrate types, for example, coarse sand, fine gravel, clay, mud, marl, and similar substrates.

1.2 This device is used in freshwater lakes, rivers, estuaries, reservoirs, oceans, and similar habitats.

1.3 For the advantages and limitations of 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 of regulatory limitations prior to use. For specific precautions, see Section 5.