D5358-93 – Standard Test Method Technical Guide

📋 Scope and Significance

This standard practice (D5358-93, Reapproved 2024) describes the procedure and equipment for taking surface samples of water or other liquids using a dipper. The dipper, with an optional extension handle, enables sampling of streams, ponds, waste pits, and lagoons from up to 15 feet away from the bank. It is especially useful for filling sample bottles without contaminating the exterior. This practice is intended for use by personnel acquiring samples and should be complemented by Guide D4687 and Practice D5088 for comprehensive sampling plans, safety, and decontamination procedures.

🛠️ Equipment and Procedure

Dippers can be fabricated as specified in the standard or obtained from commercial sources. Disposable dippers are recommended for handling hazardous materials. The dipper material must be compatible with the liquid and the analyses to be performed. The sampling procedure involves lowering the dipper into the liquid, lifting it out without splashing or disturbing the surface layer, and pouring the sample into a container. This simple process is effective for surface sampling when performed correctly.