Evening capital and Maryland gazette. (Annapolis, Md.) 1910-1922, 1922-03-21

will he avoided ard no condition Of
fensiye TO the senses viii be possible,
If solids Of appFeciabIe size have been
removed previously BIZ sedimenta ton.
In addition. however. some provision
is necessary TO prevent the establish
ment OF a condition in the Severn
River which might be productive OF
danger 10 the public health Such a
condition might easily result from the
gathering Of oysters al a point TOO
near the outfall and from the proxim-
ity of bathing beaches. In order to
decrease the entering bacterial pollu-
/ ton and TO restrict the zone of its in
auence. ii is thought necessary that
the effIuent from the sedimentation
tanks be disinfected at all seasons OF
the year.
The Commission is of the opinion
that the passage of the sewage from
Annapolis and its vicinity through
sedimentation tanks OF modern design
and subsequent distinction will suf-
iciently preserve the cleanliness and
hygienic safety OF the waters in the
neightorhood OF the city for con-
siderable period of years. At some
time in the future. if there is material
growth in the population, it may be
necessary to provide some further
form of treatment 10 reinforce. but not
to replace. the works initially con-
structed. M
Ii must not be implied, however,
that the construction of any main
drainage system and treatment works
would make safe or desirable once
more the taking of oysters in the
river or its tributaries in close prox-
unity to the city or the point of out
fall The mere runoff from The streets
and the impossibiHty 'of obtaining
complete publication of the sewage
would preclude sach a practice. A
Joint investigation by the United
States Public Health Service and the
Estate Department Of Health has dem
onstrated the danger of Clustering in
certain area of the Severn river and
has resulted in the establishment Of
definite limits within which oysters
may not be taken 1t is the Commits
sion's opinion, for the reasons already
mentioned, that the limits of the area,
within which oysters may be taken
should not be contracted and perhaps
at the easterly end should be some
what extended. when the treatment
works are built.
Capacity 0f System
The capacity Of sewerage system
should be based upon the amount of
sewage estimated 10 reach the system
at the end OF such period OF years IS
the designer deems proper that it
shall serve without enlargement. The
amount of sewage in turn will be de-
pendent upon the contributing popula-
ton. its water consumption, the pro-
portion OF water consumption reach
ing the sewers. the length of sewers in
the system and the degree of water
tightness of the .coastruction.
Il The COMMISSIONS OF the opinion
that the main sewers contemplated by
the project under consideration should
serve without relief for a period Of 80
years, or until about the year 1855.
The treatment works, however, since
they admit of economical expansion by
s. the mere gradual addition of individ-
ual tanks, may bel designed to serve
without enlargement for a much
Shorter period OF time, say until 1880
or shortly thereafter, Likewise, the
short oatfall sewer from the treat
Z ment works into the river need serve
without an additional line for a, conn
paratively brief period. A second out
let, moreover, will be of advantage in