IDDE a grate concern

Pure stormwater run-off.. (a)  

• is cloudy
• is foamy
• is clear and bright
• has a rainbow sheen
• all of the above

What information about a suspected illicit discharge would NOT be useful to collect and report?

• weather conditions

• date and time

• location

• description of the discharge

How long after the last significant rainfall should flow in a stormwater outfall make you suspicious?

• 1 hour

• 8 hours

• 1 day

• 2-3 days

Municipal separate storm sewer systems are designed to perform only the following function:

• clean-up stormwater run-off

• control and divert stormwater run-off

• treat stormwater run-off

• treat sanitary waste

Which of the following materials are common illicit discharges?

• pet wastes

• grass clippings

• paint wastes

• trash

• all of the above

Which of the following materials should never be disposed in a non-leak tight outdoor dumpster or trash can?

• paper and plastic

• any liquids

• floatables

• broken concrete

Which of the following would be suspicious if observed at a stormwater outfall?

• vapors or fumes

• dead or dying vegetation

• discolored water

• all of the above

What does a 'rainbow sheen' on stormwater indicate?

• a recent rain storm

• waste paint

• gasoline

• sewage contamination

Which of the following types of operations can be a source of illicit discharge?

• private homes

• industrial facilities

• restaurants

• municipal facilities

• all of the above

A stained storm drain inlet is probably a sign of..

• a recent MS4 maintenance work

• a marking to indicate it needs repair

• past illicit discharges

• dye testing