(Adopted: December 3, 1976)

Rule 914

Standards of Performance for

Sewage Treatment Plants

(a) Definitions

(1) SEWAGE means the spent water of a community consisting

of a combination of liquid and water-carried wastes

from residences, commercial buildings, industrial

plants, and institutions, together with any ground

water, surface water, and storm water that may be


(2) SEWAGE SLUDGE means the solid waste byproduct of

municipal sewage treatment processes, including any

solids removed in any unit operation of such treatment


(3) SEWAGE SLUDGE INCINERATOR means any combustion device

used in the process of burning sewage sludge for the

primary purpose of solids sterilization and to reduce

the volume of waste by removing combustible matter, but

does not include portable facilities or facilities used

solely for burning scum or other floatable materials,

recalcining lime, or regenerating activated carbon.

(4) SEWAGE TREATMENT PLANT means any arrangement of devices

and structures for the treatment of sewage and all

appurtenances used for treatment and disposal of sewage

and other waste byproducts.

(b) Emission Standard

This rule applies to municipal sewage treatment sludge

incinerators the construction, modification or

reconstruction of which commenced after June 11, 1973.

On and after the date on which the performance test required

to be conducted by Rule 902 (b)(1) is completed, no owner or

operator of a facility subject to the provisions of this

rule shall cause to be discharged into the atmosphere any

gases which:

(1) Contain particulate matter at a rate in excess of 0.65

kilograms per ton (1.30 lb/ton) of dry sludge input.

(2) Exhibit 20 percent opacity or greater.

(d) Monitoring

The owner or operator of any sludge incinerator subject to

the provisions of this rule shall:

(1) Install, calibrate, maintain, and operate a flow

measuring device which can be used to determine either

the mass or volume of sludge charged to the

incinerator. The flow measuring device shall have an

accuracy of +or- five percent over its operating range.

(2) Provide access to the sludge charged so that a well-

mixed representative grab sample of the sludge can be



Emissions shall be tested according to the methods specified

by the Air Pollution Control Officer.