Lesson 3/Learning Event 3
FIGURE 31. COLLECTING A SURFACE SAMPLE.
NOTE
If contaminated foliage or twigs are used for sampling, dip them In
the extraction fluid several times and then discard them. Handle
the foliage or twigs carefully to prevent them from falling Into the
liquid.
The Procedure for Collecting a Water Sample of an Unknown Chemical Agent This procedure is
performed according to the following steps.
Step 1. Use a soil collection bag and scoop to collect a water sample, free of debris if possible.
Step 2. Scoop approximately 55 milliliters (two ounces) of suspected water into a soil collection
bag.
Step 3. Fold down the top of the bag three times. Seal the bag with the attached tie straps.
Step 4. Wrap a tie tightly around the bag approximately one-fourth of the distance from the top of
the bag.
Step 5. Rinse the outside of the bag with uncontaminated water, if available, and place the bag into
a second soil collection bag. Seal it in the same manner as the bag containing the sample.
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