HWC MACT LIMIT HOW ESTABLISHED AVERAGING TIME

LIMIT 

ESTABLISHED 

WHEN 

OPERATING 

CEMS

OPERATING LIMIT 

WHEN CEMS OR 

BACKUP CEMS IS 

UNAVAILABLE

Minimum combustion chamber 

temperature Average of test run averages Hourly rolling average X X

Maximum combustion chamber pressure

No operating limit established. The kiln uses 

pressurized seals and the rest of the system is 

sealed.

NA

Maximum flue gas flow rate or production 

ratea Average of the maximum hourly rolling averages Hourly rolling average X X

Operation of waste firing system Minimum waste atomization media pressure Hourly rolling average X X

Carbon monoxide emission rate HWC MACT Hourly rolling average X X

Maximum solid waste feed Average of the maximum rolling hour averages Hourly rolling average X X

Maximum rotary kiln primary waste feed 

rate Average of the maximum rolling hour averages Hourly rolling average X X

Maximum rotary kiln secondary waste 

feed rate Average of the maximum rolling hour averages Hourly rolling average X X

Maximum SCC primary waste feed rate Average of the maximum rolling hour averages Hourly rolling average X X

Maximum SCC secondary waste feed 

rate Average of the maximum rolling hour averages Hourly rolling average X X

LIMITS ASSOCIATED WITH PARTICULATE MATTER EMISSIONS

Particulate Emission Limit CMS Performance Evaluation Test 

Plan/Alternative Monitoring Petition

6-hour rolling average from 

block hour average X

Maximum ash feed rate Average of the test run averages 12-hour rolling average X

Minimum pressure drop across the HydroSonics Average of the test run averages Hourly rolling average X-equivalent pressure 

drop

Maximum solids content of the 

condenser/absorber scrubber water via 

CMS or minimum blowdown rate and 

either minimum scrubber tank volume or 

level

Average of the test run averages

12-Hour rolling average if 

measured by CMS, Hourly 

rolling average for minimum 

blowdown and either tank 

volume or level

waived via Alternative 

Monitoring Petition 

request under 1209(g) of 

HWC MACT

Maximum solids content of the HydroSonics scrubber water via CMS or 

minimum blowdown rate and either 

minimum scrubber tank volume or level

Average of the test run averages

12-Hour rolling average if 

measured by CMS, Hourly 

rolling average for minimum 

blowdown and either tank 

volume or level

X- via CMS

Minimum liquid to gas ratio (L/G) or 

minimum liquid and maximum flue gas 

flow rates for the Hydro-Sonics scrubber

Average of the test run averages Hourly rolling average X

HCl/Cl2 emission rate CMS Performance Evaluation Test 

Plan/Alternative Monitoring Petition 12-hour rolling average X

Maximum feed rate of total chlorine and 

chloride Average of the test run averages 12-hour rolling average X

Minimum pressure drop across the HydroSonics scrubber Average of the test run averages Hourly rolling average X-equivalent pressure 

drop

Minimum pressure drop across the 

condenser/absorber Manufacturer's specifications Hourly rolling average X

Minimum liquid feed pressure to the 

condenser/absorber Manufacturer's specifications Hourly rolling average X

LIMITS ASSOCIATED WITH WASTE FEED

LIMITS ASSOCIATED WITH HCl/Cl2 EMISSIONS

 TABLE 1. ROTARY KILN INCINERATOR EXPECTED HWC MACT OPERATING AND EMISSION LIMITS

LIMITS ASSOCIATED WITH THE COMBUSTION UNIT

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HWC MACT LIMIT HOW ESTABLISHED AVERAGING TIME

LIMIT 

ESTABLISHED 

WHEN 

OPERATING 

CEMS

OPERATING LIMIT 

WHEN CEMS OR 

BACKUP CEMS IS 

UNAVAILABLE

 TABLE 1. ROTARY KILN INCINERATOR EXPECTED HWC MACT OPERATING AND EMISSION LIMITS

Hydro-Sonics scrubber minimum Liquid 

to Gas Ratio (L/G) or minimum liquid & 

maximum flue gas flow rates 

Average of the test run averages Hourly rolling average X

Condenser/absorber minimum Liquid to 

Gas Ratio (L/G) or minimum liquid & 

maximum flue gas flow rates 

Average of the test run averages Hourly rolling average X

Minimum condenser/absorber water pH Average of the test run averages Hourly rolling average

X

Minimum Hydro-Sonics scrubber water 

pH Average of the test run averages Hourly rolling average X

LIMITS ASSOCIATED WITH METALS EMISSIONS

Mercury emission rate CMS Performance Evaluation Test Plan 

Alternative Monitoring Application

12-hour rolling average from 

block hour average X

SVM emission rate CMS Performance Evaluation Test Plan 

Alternative Monitoring Application

12-hour rolling average from 

block hour average X

LVM emission rate CMS Performance Evaluation Test Plan 

Alternative Monitoring Application

12-hour rolling average from 

block hour average X

Maximum feed rate of mercury Average of the test averages – (may be 

extrapolated upward) 12-hour rolling average X

Maximum feed rate of SVM Average of the test averages – (may be 

extrapolated upward) 12-hour rolling average X

Maximum feed rate of LVM (pumpable 

and total feedrate)

Average of the test averages – (may be 

extrapolated upward) 12-hour rolling average X

Maximum total chlorine and chloride feed 

rate Average of the test run averages 12-hour rolling average X

Minimum pressure drop across the HydroSonics scrubber Average of the test run averages Hourly rolling average X-equivalent pressure 

drop

Minimum pressure drop across the 

condenser/absorber Manufacturer's specifications Hourly rolling average X

Minimum liquid feed pressure to the 

condenser/absorber Manufacturer's specifications Hourly rolling average X

Maximum solids content of the 

condenser/absorber scrubber water via 

CMS or minimum blowdown rate and 

either minimum scrubber tank volume or 

level

Average of the test run averages

12-Hour rolling average if 

measured by CMS, Hourly 

rolling average for minimum 

blowdown and either tank 

volume or level

waived via Alternative 

Monitoring Petition 

request under 1209(g) of 

HWC MACT

Maximum solids content of the HydroSonics scrubber water via CMS or 

minimum blowdown rate and either 

minimum scrubber tank volume or level

Average of the test run averages

12-Hour rolling average if 

measured by CMS, Hourly 

rolling average for minimum 

blowdown and either tank 

volume or level

X- via CMS

Condenser/absorber minimum Liquid to 

Gas Ratio (L/G) or minimum liquid & 

maximum flue gas flow rates 

Average of the test run averages Hourly rolling average X

Hydro-Sonics scrubber minimum Liquid 

to Gas Ratio (L/G) or minimum liquid & 

maximum flue gas flow rates 

Average of the test run averages Hourly rolling average X

a

 This limit is also an indicator of compliance with the SVM, LVM, PM, and HCl/Cl2 emission limits.

NA = Not Applicable CMS = Continuous Monitoring System

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