Fish group 1: 01/09/04 12:34 through 01/23/04 10:04Fish group 2 01/23/04 13:47 through 02/06/04 09:53Fish group 3: 02/06/04 13:48 through 02/20/04 12:50Fish group 4: 02/20/04 16:26 through 03/05/04 10:31Fish group 5: 03/05/04 13:26 through 03/19/04 10:01Fish group 6: 03/19/04 14:20 through 04/02/04 10:38 No fish mortality occurred during monitoring period. Six alarm events occurred.

Pelican Point, Slocum Creek, Cherry PointPelican Point, Slocum Creek, Cherry PointMCAS Summary Jan. 9, 2004 to April 2, 2004MCAS Summary Jan. 9, 2004 to April 2, 2004

Hydrological Events Fish Response

Event 1 (1/18/04 21:04 - 21:19 and 1/18/04 to 21:49 - 23:19) Alarm event was caused by a significant increase in water temperature (from 12oC to 21oC) and decrease in dissolved oxygen (from 8.8 mg/L to 1.4 mg/L) over 4.5 hours, due to a main pump malfunction. This resulted in an increased fish ventilatory rate and ventilatory depth.

Event 2 (1/27/04 1:17 through 1/27/04 03:02): Alarm event occurred due to a pump malfunction, similar to Event #1.

Event 3 (2/1/04 1:38 through 2/1/04 3:23): An alarm event similar to Events #1 and #2 occurred due to a pump malfunction.

Event 4 (Multiple alarms from 2/18/04 17:50 through 2/20/04 13:05) There were 10 separate alarms over 9.5 hours. The only fish ventilatory parameter that changed was average depth. Conductivity during the acclimation / baseline period was ~5.00 mS/cm, whereas average conductivity during the alarm period was 0.98 mS /cm. There was an increase in average fish ventilatory depth in response to the decrease in conductivity (inversely proportional relationship).

Event 5 (2/27/04 9:56 through 2/27/04 10:11) An alarm event occurred for 15 minutes due to scheduled maintenance to the system. During that time there was a +2.5oC increase in temperature and -1.35 mg/L decrease in dissolved oxygen. All four ventilatory parameters increased, then recovered in the next period.

Event 6 (Multiple alarms from 3/7/04 22:56 through 3/7/04 23:41) A 45-minute alarm event was caused by a sharp decrease in dissolved oxygen (by 1.02 mg/L) in 15 minutes, along with a gradual temperature increase. The alarm was primarily caused by increased fish ventilatory rate and ventilatory depth, consistent with the response patterns of events 1 through 3.

Event 7 (Multiple alarms 3/9/04 9:26 through 3/19/04 09:31) Alarm events were caused primarily by decreased average fish ventilatory depth. The average depth during baseline was ~12 V, and the conductivity was ~2 mS/cm. At the time of the alarms, the average depth was ~5 V and the conductivity was ~5 mS /cm. The average depths of all fish were significantly lower than the average depths during the baseline period, resulting in a sustained “fish out of control” situation during the rest of the monitoring period for fish group 5.

Event 1 (1/18/04 21:04 - 21:19 and 1/18/04 to 21:49 - 23:19) An alarm event was caused by a significant increase in water temperature (from 12oC to 21oC) and decrease in dissolved oxygen (from 8.8 mg/L to 1.4 mg/L) in 4.5 hours, due to a main pump malfunction. This resulted in an increased fish ventilatory rate and ventilatory depth.

Event 2 (1/27/04 1:17 through 1/27/04 03:02): Alarm event occurred due to a pump malfunction, similar to event #1.

Event 3 (2/1/04 1:38 through 2/1/04 3:23): An alarm event similar to events #1 and #2 occurred due to a pump malfunction.

Event 4 (Multiple alarms from 2/18/04 17:50 through 2/20/04 13:05) There were 10 separate alarms during 9.5 hours. The only fish ventilatory parameter responding was average depth. Conductivity during the acclimation / baseline period was ~5.00 mS/cm, whereas average conductivity during the alarms was ~0.98 mS /cm. There was an increase in average fish ventilatory depth in response to the decrease in conductivity (inversely proportional relationship).

Event 5 (2/27/04 9:56 through 2/27/04 10:11) An alarm event occurred for 15 minutes, and during that time there was a +2.5 oC increase in temperature and -1.35 mg/L decrease in dissolved oxygen. All four fish ventilatory parameters increased during, then recovered in the next period. This alarm was caused by to scheduled maintenance to the system.

Event 6 (Multiple alarms from 3/7/04 22:56 through 3/7/04 23:41) A 45-minute alarm event was caused by a sharp decrease in dissolved oxygen (by 1.02 mg/L) in 15 minutes, along with a gradual temperature increase. The alarm was primarily caused by increased fish ventilatory rate and ventilatory depth, consistent with the response patterns of events 1 through 3.

Event 7 (Multiple alarms 3/9/04 9:26 through 3/19/04 09:31) Alarm events were caused primarily by decreased average fish ventilatory depth. The average depth during baseline was ~12 V, and conductivity was ~2 mS/cm. At the time of the alarms, the average depth was ~5 V and the conductivity was ~5 mS /cm. The average depths of all fish were significantly lower than the baseline period average depths, resulting in a sustained “fish out of control” situation during the rest of the monitoring period for fish group 5.