The Foam Concentrate sample should be representative of the stored product.

The three recognised sample procedures most frequently used are:

Single Sample
Circulate the stored product to obtain a single homogeneous sample.

Two Samples
Take a sample from the top and bottom of the stored product and composite the samples into a single unit.

Three Samples
Take a top, middle and bottom sample and composite into a single unit.

Bottom sampling
It is important that sludge, sediment, rust, scale etc is removed before collection of the sample. To do this draw off at least 5−10L of product before taking a sample

Sample bottles and labels
Samples should ideally be provided in clean tightly sealed polythene bottles and be labelled with the following information:

• Type of Foam Concentrate/Produced Foam e.g. 3% AFFF−LF
• Name of Company
• Date of Sample Taken
• Sample Source

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