ILLINOIS

POLLUTION CONTROL BOARD

July 26, 1983

CITY OF WOOD

RIVER,

)

Petitioner,

PCB 83—98

ILLINOIS

ENVIRONMENTAL

PROTECTION AGENCY,

)

OPINION AND ORDER OF THE BOARD (by

W.J~

Nega):

This provisional variance request

comes before the Board upon

a July 26, 1983 Recommendation of the Illinois Environmental

Protection Agency

(Agency).

The Agency recommends that a 5—day

provisional

variance be granted

to the City of Wood River (Wood

River) to

allow bypassing of its

wastewater treatment plant (WWTP)

so that the

sluice gates in

the

gatewell structure of a 24—inch

effluent pipe

can be

replaced.

Wood River

owns and operates

a WWTP which serves about 12,500

people. The

Petitioner’s WWTP

includes influent pumps, bar screen,

grit chamber,

and two primary

clarifiers. The

WWTP,

which

discharges

directly to the tliss:Lssippi River

pursuant to NPDES

Permit

No. IL OO31852~~has a design average flow

of 1.7 million

gallons per day.

Wood

River is participating in the

Construction Grants

Program and is

currently in the

process of upgrading its WWTP

to a regional

treatment facility

to serve the nearby villages of

South Roxana

and Hartford, Amoco Chemical

Corporation (Amoco)

and the City

of Wood River itself. The

upgrading of the Petitioner’s

WWTP

has

been

divided into two

phases.

Construction in Phase I began

in April,

1983 and is scheduled to be

completed

in

April, 1983.

This one—year

construction

project includes:

(1) construction

of a grit chamber/bar screen as preliminary treatment facilities;

(2) upgrading

and expansion of the

present primary clarifiers;

(3) construction

of flow measurement; (4)

renovation of the sewage

pump station and

the existing Wood River

plant service building;

(5) construction

of a pumping station

and forcemain (to direct

primary treated

flow to the Amoco WWTP);

and

(6)

construction

of a primary

sludge force main from

the primary facilities to the

Amoco aerobic

digester. When Phase I

of the construction project

is completed,

the Petitioner’s WWTP will

have primary treatment

capacity

for 2,46 million gallons per

day DAF and 6.2 million gallons

per day DMF.

(Rec, 2).

53417

---

-2—

Construction in Phase II is scheduled to begin in October,

1983 and is expected to be completed in October, 1984. The Phase

II project includes: (1) renovation of Amoco’s WWTP (which was

given to the City of Wood River by Amoco) to utilize Amoco’s

“ciariflotator” for the pretreatment of Amoco’s flows; (2) reno-

vation of Amoco’s final clarifier, aeration tank, aerobic digester,

and lagoons for storage of excess wastewater during single—unit

outage; (3) conversion of Amoco’s final filter to a chlorine

contact tank; (4) upgrading and expansion of Amoco’s sludge

dewatering facilities; and (5) construction of chlorination

facilities. (Rec. 2). When construction is completed in October,

1984, the WWTP will be rated at 5.1 million gallons per day DAF

and 9.8 million gallons per day DMF,

The Petitioner has stated that, in order to proceed with its

Phase I construction plans, it needs to replace the sluice gates

in the gatewell structure of the 24—inch effluent pipe. In order

to make these necessary repairs, Wood River has requested per-

mission to bypass the grit chamber and primary clarifiers for

approximately 5 days, (Rec. 3). During this 5-day bypassing

period, the Petitioner plans to discharge untreated wastewater

directly into the Mississippi River. This untreated wastewater

will probably contain levels of BOD which average between 175

mg/i and 280 mg/i and levels of TSS which average between 74 mg/i

and 89 mg/l during an 8½ hour workday with the peak being sometime

in the mid—morning. (Rec. 3). A temporary screening will be

provided before bypassing in the 84—inch combined interceptor

sewer.

The Agency has noted that, although bypassing will probably

occur at a time when the Mississippi River is at a relatively low

level, there is no reasonable alternative to bypassing and denial

of the provisional variance would merely serve to add additional

expenses and unnecessary delay to the construction of a needed

wastewater treatment facility. (Rec, 4).

The Agency has concluded that compliance on a short—term

basis with the provisions of 35 Ill. Mm, Code 306.305 would

impose an arbitrary or unreasonable hardship. It, therefore,

recommends that the Board grant the City of Wood River a provi-

sional variance from Section 306.305 for the period of July 27,

1983 through August 3, 1983, subject to certain conditions.

Pursuant to Section 35(b) of the Illinois Environmental

Pro—tection Act, the Board hereby grants the provisional variance

as recommended.

---

—3—

ORDER

The City of Wood River is hereby granted a provisional variance

from 35 Iii. Mm. Code 306.305 for the period of July 27, 1983

through August 3, 1983, subject to the following conditions:

1. Wood River shall notify Robert E. Broms, P.E.,

Manager, Compliance Assurance Section, Division of Water Pollution

Control at 217/782—9720:

a.) the day construction on the sluice gates begins;

b.) the day construction on the sluice gates is completed

and all bypassing ceased;

2. Wood River shall provide screening for all flows prior

to bypassing~

3, Wood River shall report, within 7 days after completion

of construction on the sluice gate, the dates and times bypassing

occurred and submit these reports to:

Illinois Environmental Protection Agency

Division of Water Pollution Control

Compliance Assurance Section

2200 Churchill Road

Springfield, Illinois 62706

4. Within 10 days of the date of the Board’s Order,

Wood River shall execute a Certificate of Acceptance and Agreement

which shall be sent to: Illinois Environmental Protection Agency,

Division of Water Pollution Control, Compliance Assurance Section,

2200 Churchill Road, Springfield, Illinois 62706. This certi-

fication shall have the following form:

CERTIFICATION

I, (We)

having read the Order of the Illinois Pollution Control Board in

PCB 83—98 dated July 26, 1983, understand and accept said Order,

realizing that such acceptance renders all terms and conditions

thereto binding and enforceable.

Petitioner

By: Authorized Agent

—

Title

Date

53419

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—4*

IT IS SO ORDERED.

I, Christan L. Moffett, Clerk of the Illinois Pollution

Control Board, hereby certify that the above Opinion and Order

was adopted on the_~7~dayof

~

,

1983

byavoteof

L~--(~,

I

/

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Christan L. Moffett, Cle

Illinois Pollution Control Board