Dissolved Oxygen Measurement Procedures

This video tutorial guides viewers through the process of conducting a streamside chemical assessment using a provided kit. It covers the components of the kit, safety precautions, and detailed instructions for measuring water temperature, turbidity, dissolved oxygen, and pH levels. Viewers are instructed on how to record their findings and report any pollution observed.

What should you do if you notice active pollution while using the kit?

• Ignore it and continue the assessment.

• Report it to 311 and avoid contact with the water.

• Try to clean it up yourself.

• Call the police immediately.

What is the first step in recording the temperature of the water?

• Submerge the container in water for 30 seconds.

• Fill the container with water twice to clean it.

• Shake the container vigorously.

• Add a temperature tablet to the water.

How long should the container sit after being filled with water for temperature measurement?

• 10 minutes

• 30 seconds

• 5 minutes

• 1 minute

What is used to compare the turbidity of the water?

• A thermometer

• A pH key

• A sky disc color key

• A dissolved oxygen key

How many dissolved oxygen tablets are needed for the test?

• One

• Two

• Three

• Four

What should you ensure when filling the vial for dissolved oxygen measurement?

• There are no bubbles in the vial.

• The water is warm.

• The vial is overfilled.

• The vial is half full.

What is the correct pH level indicated by the test in the video?

• 8

• 5

• 6

• 7

What should you do with the used gloves after completing the assessment?

• Wash and reuse them.

• Dispose of them in a trash can.

• Leave them at the site.

• Return them to the kit.

What should be done with the water and tablets in the small glass vial after the test?

• Leave them in the vial and return it to the kit.

• Pour them back into the stream.

• Dispose of them in the trash.

• Flush them down the toilet.

What is the purpose of the wide range pH tablet in the assessment?

• To measure dissolved oxygen

• To measure turbidity

• To measure temperature

• To measure pH levels