Potable Water

Question 1

What is the minimum distance between a water line and a sewer line in a trailer park?

Answer 1

10 feet

Question 2

Methemoglobinemia is caused by

Answer 2

Nitrates

Question 3

What should an ice machine disposal hook up to?

Answer 3

Floor drain with air grap

Question 4

Giardia cyst concentration that causes disease

Answer 4

500:1

Question 5

What is the best system for a small community?

Answer 5

Rapid sand

Question 6

Best filter for phosphorus?

Answer 6

Reverse Osmosis

Question 7

Which agency would you refer to for writing water policy?

Answer 7

NGWA (National Ground Water Association)

Question 8

Risk of typhoid fever in unprotected water supply is highest in:

Answer 8

Pit privy near spring

Question 9

What is thiosulfate used for?

Answer 9

Used to dechlorinate water for sampling.

Question 10

Minimum distance animal remains may be buried in relation to a well?

Answer 10

200 feet (from APHIS)
Other sources say 100 feet

Question 11

What should be considered when installing a well?

Answer 11

Drainfield

Question 12

Which of these is most likely to infect water supply?

Runoff from chicken farm
Contaminated runoff
cesspool next to water supply

Answer 12

Cesspool next to water supply

Question 13

How to obtain water sample to test for lead?

Answer 13

First Draw Sampling.

1. Allow water to sit undisturbed for at least 6 hours. (No flushing)
2. Open faucet and collect first water out of tap.

Question 14

Test for fecal contamination in water?

Answer 14

Fecal Coliform test

Question 15

What is total coliform test for?

Answer 15

General indicator of water quality. If positive need to test for fecal coliforms to see if there is fecal contamination.