Location

Treatment

N

dB

Tank room

No water flow

5

36.1 (1.7) w

Flow to all tanks

15

68.4 (1.5) x

Tank cleaning (center of room)

3

73.0 (0.8) y

Tank cleaning (by tanks)

3

77.1 (0.8) z

Feeders running

3

73.2 (0.8) y

Rearing pavilion

Normal operation

15

70.2 (3.1) x

Power washing tanks

15

76.1 (2.3) y

Power washer

3

83.2 (2.1) z

Tank sumps

3

77.8 (1.7) yz