Currents and related problems at Metropolitan Beach, Lake St. Clair / John C. Ayers.

effects of man, and is accompanied by detrital or non-ionizing
materials. In this sense, high conductivity indicates water to
which man has contributed, hence water of probably poor quality.
To provide ourselves with data upon the probable qualities
of local waters that could reach Metropolitan Beach, and to ascertain their levels of contributed materials, seventeen water
samples for comparative conductivity and residue-upon-evaporation
determinations were collected in October and November of 1962.
These samples were analyzed for conductivity at uniform
temperature (25~C) and corrected back to the 180C conductivity
that was sometimes used in the past.
Half of each sample was then measured and evaporated to
dryness, giving the "Total Residue" which was computed in terms
of parts per million parts by weight (ppm).
The other half of each sample was passed through a millipore filter (which removed even the bacteria), and evaporated to
dryness, giving the "Filterable (filter-passing) Residue" which
was also computed in parts per million.
Table 2 presents the results of these analyses, arranged
by local water types and generally in the order of decreasing
conductivity and residues. It is evident that they are, also,
arranged in general order of progressively better water-quality.
This table, unfortunately, does not include one local water
type that can reach Metropolitan Beach. That is the water of the
Clinton River Sluiceway. This particular water source has a conductivity of 310 to 360 in the Sluiceway. Northwest winds blow
the water of the Sluiceway out into the lake, where it travels

eastward across the intake of the Mt. Clemens water works
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