Lesson 3/Learning Event 1
Step 6. Rotate the sampler so that the test spots are down and force the liquid through the channels
to wet the spots (figure 16).
Step 7. Hold the sampler in a horizontal position (figure 16).
The heater produces hot vapors and Is hot to the touch. Keep
away from face and bare skin after the ampoules are broken.
Step 8. Finger-crush one of the two green ampoules marked 4 (figure 17). Immediately swing the
hinged heater assembly over the test spot. Vent the vapor away from the operator's body.
FIGURE 17. BEGIN STEPS USING NO. 4
Step 9. Leave the hinged heater assembly in place for two minutes (figure 17). After two minutes
have passed, swing the hinged heater assembly and hinged protective strip away from the test spots.
Step 10. Hold the sampler by the hinged protective strip (figure 18 on page 46).
Step 11. Hold the sampler approximately two to three inches above the ground (figure 18). Shield
the test spots from direct sunlight. Wait 10 minutes.