Standard Practice for Sampling Liquids Using Bailers

Importancia y uso:

5.1 A bailer is a device for obtaining a sample from stratified or un-stratified waters and liquid wastes. The most common use of a bailer is for sampling ground water from single-screened wells (Fig. 1) and well clusters (see Guide D4448).

5.2 This practice is applicable to sampling water and liquid wastes. The sampling procedure will depend on sampling plan and the data quality objectives (DQOs) (Practice D5792).

5.3 Bailers may be used to sample waters and liquid wastes in underground and above ground tanks and surface impoundments. However, the design of the unit and associated piping should be well understood so that the bailer can access the desired compartment and depth. Any stratification of the liquid should be identified prior to sampling.

Note 1: Viscous liquids and suspended solids may interfere with a bailer's designed operation.

5.4 Bailers may disturb the water column and may cause changes to the parameters to be measured (for example, turbidity, gases, etc.).

5.5 The use of bailers in low flow wells for purging can result in increased agitation and turbidity in the sample and can introduce errors into the sample if the water surface level is drawn down below the top of the screen. In such cases, alternate methods of sampling such as Passive Sampling (Guide D7929) or Low Flow Sampling (Practice D6771) should be considered.

5.6 If samples are to be collected for the determination of per- and poly-fluorinated alkyl substances (PFAS), all sampling equipment should be made of fluorine-free materials. Other considerations for PFAS sampling may exist but are beyond the scope of this standard.

Subcomité:

D34.01.03

Referida por:

D6759-24, D6232-21

Volúmen:

11.04

Número ICS:

13.030.20 (Liquid wastes. Sludge), 55.100 (Bottles. Pots. Jars)

Palabras clave:

bailer; ground water; liquid sampling; sampling waste;