ILLINOIS POLLUTION CONTROL
BOARD
#R71-3:
Secondary Treatment Dates,
Ohio
River
Adopted May 26,
1971
SWB—l0
is hereby amended as follows:
1.
Repeal the regulations found in paragraph
7 of Rule
1.08
and in its place substitute
the following:
“All
oxygen—demandine
waste
discharges
and
wastes
containing
suspended
solids
shall
receive
a
minimum
of
secondary
treatment,
as
defined
herein,
by
December
31,
1973.
“For
sewage
works
which
receive
influent
equal
to
or
greater
than 10,000 population equivalents
(P.E.),
secondary
treatment
shall
mean that degree of treatment which will result
in
at least
a
90
reduction
in
five-day
biochemical
oxygen
demand
(BOD5)
and suspended
solids
and
provide
an
effluent
which
contains
no
more
than
20
mg/l
of
five-day
biochemical
oxygen
demand
(BOD~)
and 25 mg/l
of
suspended
solids
“For
sewage
works
which
receive
an
influent
of
less
than
10
,000
population
eguiva1en~s
(P .E.)
secondary
treatment
shall
mean
that
degree
of
treatment
which
will
result
in
at least an
85
reduction
in
five-day
bicch~moicai
oxygen
demand
and
suspended
solids
and
orovide an effluent whic:r~contains
no
more
than
30
mg/l
of five—day
b~ochenical oxyaen
demand
(EOD~~
and
37
mg/i
of
suspended
solids.
“Disinfection
wiTL:L
he
provided
for
all
effluents
to
reduce
fecal
colifcrrns
to
400
per
lOt)
nl
or
less
before
discharge
to
any
waters
desiunated
for
primary
contact
or
to
2
r°0°
per
100
ml.
before
discharge
to
any
other
waters.
“Bvuass
flows
in
excess
of
sewacme
works
capacity
shall
he
given
primer
treatment
and
disinfection
in
auxiliary
facilities~
“Any
dates
anpearing
in
this
regulation
whach
are
inconsistent
with
the
December
31,
1973
date
are
hereby
repealed.”
2.
Repeal
the
reoulations
found
in
raragraoh
8
of
Rule
1.09.
3.
Repeal
the
reculations
found
in
paragraphs
11
(a)
and 11
(b)
of Rule
i~08,
1
-—
639