ILLINOIS POLLUTION CONTROL BOARD

March 22, 1990

VILLAGE OF MOUNT MORRIS,

)

Petitioner,

V.

)

PCB 90-38

)

(Provisional Variance)

ILLINOIS ENVIRONMENTAL

)

PROTECTION AGENCY,

)

Respondent.

ORDER OF THE BOARD (J. Marlin):

This matter comes before the Board on receipt of an Agency

Reconunendatjon dated March 20, 1990. The recommendation refers

to a request from Petitioner, Village of Mount Morris for a 45-

day provisional variance from 5—day biochemical oxygen demand

(BOD5), suspended solids (TSS), and ammonia nitrogen (NH3)

effluent standards, as set forth in 35 Ill. Adm. Code 302.212 and

304.120(c), for the period beginning from the removal of the

Village’s sand filters from service, on or about June 11, 1990,

and continuing for 45 days.

Upon receipt of the request the Agency issued its

recommendation, concluding that failure to grant the requested

45—day provisional variance would impose an arbitrary or

unreasonable hardship on Petitioner.

The Village owns and operates a 0.5 MGD wastewater treatment

facility that discharges to an unnamed tributary of Pine Creek,

in the Rock River basin. The effluent normally contains 10 mg/I

BOD5, 12 mg/l TSS, and 1.5 mg/l NH3. The treatment facility

includes high rate sand filters and rotating biological

contactors (RBC5). The Village must rebuild the sand filters and

install a chemical cleaning system. This will take the RBCs and

sand filters out of service for about 45 days, and the Village

intends to commence this work on or about June 11, 1990. During

this period, the Village will continue to operate its remaining

equipment, an aerated grit chamber, a primary clarifier, a

trickling filter, a final clarifier, and a chlorine contact tank,

providing full secondary treatment of all effluent.

The Agency agrees with the Village that the environmental

impact of the requested relief should be minimal for this reason.

The Agency is aware of no federal law that would preclude the

requested relief. The Agency states that it is unaware of no

downstream public water supplies that would receive an adverse

impact from the requested provisional variance. For these

reasons, the Agency recommends that the Board grant the requested

IO9--5~9

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relief with certain recited conditions.

In light of the Agency Recommendation, the Board hereby

grants a provisional variance from 35 Ill. Adm. Code 302.212 and

304.120(c), with the following conditions:

1. The term of this provisional variance shall commence on

the date the Village of Mount Morris removes its sand

filters from service, and it shall expire after the 45th day

following the date of such removal from service;

2. During the term of this provisional variance, the

effluent from the Village of Mount Morris’ treatment plant

shall not exceed concentrations of 45 mg/i BOD5, 60 mg/l

TSS,3. andDuring12 mg/ithe

termNH3 of this provisional variance, the

Village of Mount Morris shall collect samples and analyze

them according to the terms of NPDES permit number

IL003003l, and report them to the Agency on its monthly

discharge monitoring reports;

4. The Village of Mount Morris shall notify Dennis Connor

of the Agency’s Rockford office by telephone, at 815-987-

7755, when the sand filters are removed from service and

when the work is completed, and the Village shall confirm

this notice in writing within five days, addressed •as

follows:

Illinois Environmental Protection Agency

Division of Water Pollution Control

Compliance Assurance Section

2200 Churchill Road

P.O. Box 19276

Springfield, Illinois 62794—9276

Attention Mark Brooks

5. During the term of this provisional variance, the

Village of Mount Morris shall operate its plant in a manner

that assures that it discharges the best quality effluent

practicable; and

6. The Village shall execute a copy of a Certificate of

Acceptance of this provisional variance and forward that

copy to the Agency addressed as indicted in condition 4; the

Village shall forward that copy within 10 days of the date

of this Order of the Board, i.e., on or before April 2,

1990; and the Certificate of Acceptance shall take the

following form:

1fl9~—570

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CERTIFICATION

I (We), _______________________________

hereby accept and agree to be bound by all terms

and conditions of the Order of the Pollution

Control Board in PCB 90—38, March 22, 1990.

Petitioner

Authorized Agent

Title

Date

IT IS SO ORDERED.

J. Duinelle concurred.

I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control

Board, hereby certify that the above Opinion and Order was

adopted on the ~2?.~’?~c~’dayof

_____________,

l99U, by a vote

of

____________________

Dorothy M./Gunn, Clerk

Illinois Pollution Control Board

109—571