[Code of Federal Regulations]

[Title 40, Volume 29]

[Revised as of July 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR503.41]



[Page 845-846]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 503_STANDARDS FOR THE USE OR DISPOSAL OF SEWAGE SLUDGE--Table of Contents

 

                         Subpart E_Incineration

 

Sec. 503.41  Special definitions.



    (a) Air pollution control device is one or more processes used to 

treat the exit gas from a sewage sludge incinerator stack.

    (b) Auxiliary fuel is fuel used to augment the fuel value of sewage 

sludge. This includes, but is not limited to, natural gas, fuel oil, 

coal, gas generated during anaerobic digestion of sewage sludge, and 

municipal solid waste (not to exceed 30 percent of the dry weight of 

sewage sludge and auxiliary fuel together). Hazardous wastes are not 

auxiliary fuel.

    (c) Average daily concentration is the arithmetic mean of the 

concentration of a pollutant in milligrams per kilogram of sewage sludge 

(dry weight basis) in the samples collected and analyzed in a month.

    (d) Control efficiency is the mass of a pollutant in the sewage 

sludge fed to an incinerator minus the mass of that pollutant in the 

exit gas from the incinerator stack divided by the mass of the pollutant 

in the sewage sludge fed to the incinerator.

    (e) Dispersion factor is the ratio of the increase in the ground 

level ambient air concentration for a pollutant at or beyond the 

property line of the site where the sewage sludge incinerator is located 

to the mass emission rate for the pollutant from the incinerator stack.

    (f) Fluidized bed incinerator is an enclosed device in which organic 

matter and inorganic matter in sewage sludge are combusted in a bed of 

particles suspended in the combustion chamber gas.

    (g) Hourly average is the arithmetic mean of all measurements, taken 

during an hour. At least two measurements must be taken during the hour.

    (h) Incineration is the combustion of organic matter and inorganic 

matter in sewage sludge by high temperatures in an enclosed device.

    (i) Incinerator operating combustion temperature is the arithmetic 

mean of the temperature readings in the hottest zone of the furnace 

recorded in a day (24 hours) when the temperature is averaged and 

recorded at least hourly during the hours the incinerator operates in a 

day.

    (j) Monthly average is the arithmetic mean of the hourly averages 

for the hours a sewage sludge incinerator operates during the month.

    (k) Performance test combustion temperature is the arithmetic mean 

of the average combustion temperature in the hottest zone of the furnace 

for each of the runs in a performance test.

    (l) Risk specific concentration is the allowable increase in the 

average daily ground level ambient air concentration for a pollutant 

from the incineration of sewage sludge at or beyond the property line of 

the site where the sewage sludge incinerator is located.

    (m) Sewage sludge feed rate is either the average daily amount of 

sewage sludge fired in all sewage sludge incinerators within the 

property line of the site where the sewage sludge incinerators are 

located for the number of days in a 365 day period that each sewage 

sludge incinerator operates, or the average daily design capacity for 

all sewage sludge incinerators within the property line of the site 

where the sewage sludge incinerators are located.

    (n) Sewage sludge incinerator is an enclosed device in which only 

sewage sludge and auxiliary fuel are fired.

    (o) Stack height is the difference between the elevation of the top 

of a sewage sludge incinerator stack and the



[[Page 846]]



elevation of the ground at the base of the stack when the difference is 

equal to or less than 65 meters. When the difference is greater than 65 

meters, stack height is the creditable stack height determined in 

accordance with 40 CFR 51.100 (ii).

    (p) Total hydrocarbons means the organic compounds in the exit gas 

from a sewage sludge incinerator stack measured using a flame ionization 

detection instrument referenced to propane.

    (q) Wet electrostatic precipitator is an air pollution control 

device that uses both electrical forces and water to remove pollutants 

in the exit gas from a sewage sludge incinerator stack.

    (r) Wet scrubber is an air pollution control device that uses water 

to remove pollutants in the exit gas from a sewage sludge incinerator 

stack.



[58 FR 9387, Feb. 19, 1993, as amended at 64 FR 42571, Aug. 4, 1999]