Supplemental Codes

These supplemental codes are maintained by CDPHE Air Toxics and Ozone Precursors program to supplement available EPA codes as needed.

Qualifier Codes

Qualifier Code	Qualifier Description	Qualifier Type	Qualifier Type Code	Additional Notes
UD	Raw or uncorrected data, potentially requiring correction	Quality Assurance Qualifier	QA	May be appropriate for use with air sensor data
CD	Corrected data (e.g., via application of a calibration model)	Quality Assurance Qualifier	QA	May be appropriate for use with air sensor data
QW	Wind speed and/or direction data questionable	Quality Assurance Qualifier	QA	May be especially relevant to mobile monitoring data
QG	GPS data questionable	Quality Assurance Qualifier	QA	May be especially relevant to mobile monitoring data
CG	Corrected or modified GPS data	Quality Assurance Qualifier	QA	May be especially relevant to mobile monitoring data
IG	GPS data invalid	Quality Assurance Qualifier	QA	May be especially relevant to mobile monitoring data
CO	Co-located field sample	Quality Assurance Qualifier	QA	For physically co-located samples (different from duplicates)
ZI	Zone: indoor. Indoor air sample	Quality Assurance Qualifier	QA	For measurements taken indoors

Parameter Code	Parameter	CAS Number	Round or Truncate	Additional Notes
75101	O2	7782-44-7	R	May be relevant to continuous emissions monitoring data
75102	Flow Rate		R	May be relevant to continuous emissions monitoring data
75103	Exit Temp		R	May be relevant to continuous emissions monitoring data
75104	Opacity		R	May be relevant to continuous emissions monitoring data
75105	CO Emission Factor Heat Rate		R	May be relevant to continuous emissions monitoring data
75106	NOx Emission Factor Heat Rate		R	May be relevant to continuous emissions monitoring data
75107	Fuel Gas		R	May be relevant to continuous emissions monitoring data
75108	Combustion Zone Net Heating Value		R	May be relevant to continuous emissions monitoring data
75109	Heat Content		R	May be relevant to continuous emissions monitoring data
75110	Heat Rate		R	May be relevant to continuous emissions monitoring data
75111	H2S Flare Gas		R	May be relevant to continuous emissions monitoring data

Unit Code	Units	Additional Notes
301	Standard cubic foot per minute at 1 ATM and 68°F	May be relevant to continuous emissions monitoring data
302	Standard cubic foot per hour at 1 ATM and 68°F	May be relevant to continuous emissions monitoring data
303	Standard cubic foot per minute at 1 ATM and 60°F	May be relevant to continuous emissions monitoring data
304	Standard cubic foot per hour at 1 ATM and 60°F	May be relevant to continuous emissions monitoring data
305	Actual cubic foot per hour	May be relevant to continuous emissions monitoring data
306	ppm at 0% O2	May be relevant to continuous emissions monitoring data
307	lbs/min	May be relevant to continuous emissions monitoring data
308	lbs/hour	May be relevant to continuous emissions monitoring data
309	lbs/MMBTU	May be relevant to continuous emissions monitoring data
310	lbs/ton coke burned	May be relevant to continuous emissions monitoring data
311	tons/year	May be relevant to continuous emissions monitoring data
312	% volume wet	May be relevant to continuous emissions monitoring data
313	% volume dry	May be relevant to continuous emissions monitoring data
314	BTUH/scf	May be relevant to continuous emissions monitoring data
315	BTUL/scf	May be relevant to continuous emissions monitoring data
316	MMBTU/hr	May be relevant to continuous emissions monitoring data
317	lbs/day	May be relevant to continuous emissions monitoring data
318	kg/hr	May be relevant to monitoring providing emissions estimates

Example Parameters	Method Code	Recording Mode	Collection Description	Analysis Description	Round Truncate Indicator	Additional Notes
Carbon monoxide, Nitrogen dioxide, Ozone		Continuous	Sensor	Electrochemical	R	May be relevant to air quality sensors
Carbon dioxide		Continuous	Sensor	Nondispersive Infrared	R	May be relevant to air quality sensors
Volatile organic compounds	Continuous	Sensor	Photoionization detector	R	May be relevant to air quality sensors
Xylene(s), benzene		Continuous	Semi-Continuous Analyzer	GC/PID	R	May be relevant to air quality sensors
Carbon monoxide, Nitrogen dioxide, Ozone		Continuous	Sensor	Electrochemical	R	May be relevant to air quality sensors
Carbon monoxide, Nitrogen dioxide, Ozone		Continuous	Sensor	Electrochemical	R	May be relevant to air quality sensors
Carbon monoxide, Nitrogen dioxide, Ozone		Continuous	Sensor	Electrochemical	R	May be relevant to air quality sensors
Carbon monoxide, Nitrogen dioxide, Ozone		Continuous	Sensor	Electrochemical	R	May be relevant to air quality sensors