Standard Practice for Sampling with a Composite Liquid Waste Sampler (COLIWASA)

Importancia y uso:

5.1 This practice is applicable to sampling liquid wastes and other stratified liquids. The COLIWASA is used to obtain a vertical column of liquid representing an accurate cross section of the sampled material. To obtain a representative sample of stratified liquids, the COLIWASA should be open at both ends so that material flows through it as it is slowly lowered to the desired sampling depth. The COLIWASA must not be lowered with the stopper in place. Opening the stopper after the tube is submerged will cause material to flow in from the bottom layer only, resulting in gross over-representation of that layer.

5.2 This practice is to be used by personnel acquiring samples.

5.3 This practice should be used in conjunction with Guide D4687 which covers sampling plans, safety, QA, preservation, decontamination, labeling, and chain-of-custody procedures; Practice D5088 which covers decontamination of field equipment used at waste sites; Practice D5283 which covers project specifications and practices for environmental field operations; and Practice D5743 which covers drum sampling.

Subcomité:

D34.01.03

Referida por:

D7831-20, D6063-11R18, D8008-20, D5743-21, D6232-21

Volúmen:

11.04

Número ICS:

13.030.20 (Liquid wastes. Sludge)

Palabras clave:

COLIWASA; drum sampling; liquid sampling; sampling; waste;