Cook Plant preoperational studies 1970 / John C. Ayers ... [et al.].

Passage through the plant, with and without the effects of plume heat,
produced intermediate live/dead ratios that are probably not significantly
different.
The major improvements that these experiments indicate are: 1) the use
of considerably larger water-bags, and 2) the use of a #10 mesh net for zooplankton collections. The necessity for prompt microscopic examinations of
fresh zooplankton collections mitigates against greater replication of samples.
The condensers at Bailly were chlorinated at 1200 on 20 June 1970.
Reference to the times included in the zooplankton summary table will show
that our outfall water samples were obtained 1.5 hours after the chlorination.
The elapsed time column of that table indicates that about 30 minutes
were required for water from the outfall mouth to pass through the plume, and
if five minutes are assumed as the time for passage from condenser to outfall
mouth, the chlorine remnants must have passed out of the outfall about an hour
before our 1325 samples were taken. It is extremely unlikely that any effect
of chlorination is contained in our bacterial, phytoplankton, or zooplankton
results.
Studies of the DuPont Chemical Company Submerged Outfall at Montague,
Michigan. About 12 miles north of Muskegon, Mich., there is a small drowned
river valley called White Lake which opens into Lake Michigan. About 5 miles
inland from Lake Michigan the two towns of Montague (on the north) and Whitehall (on the south) lie on opposite sides of the White River at the head of
White Lake. The names of the towns and of White Lake are used with a confusing
amount of interchangeability.
In Montague the DuPont Chemical Company runs a chemical plant which has
an outfall for the discharge of warmed water and some waste chemicals into
Lake Michigan. The plant effluent leaves the plant at 26.70C, travels about

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