Null Data Codes in old format

Qualifier Code	Old Null Data Code	Item Description
AA	9967	SAMPLE PRESSURE OUT OF LIMITS
AB	9968	TECHNICIAN UNAVAILABLE
AC	9969	CONSTRUCTION/REPAIRS IN AREA
AD	9970	SHELTER STORM DAMAGE
AE	9971	SHELTER TEMPERATURE OUTSIDE LIMITS
AF	9972	SCHEDULED BUT NOT COLLECTED
AG	9973	SAMPLE TIME OUT OF LIMITS
AH	9974	SAMPLE FLOW RATE OUT OF LIMITS
AI	9975	INSUFFICIENT DATA (CAN'T CALCULATE)
AJ	9976	FILTER DAMAGE
AK	9977	FILTER LEAK
AL	9978	VOIDED BY OPERATOR
AM	9979	MISCELLANEOUS VOID
AN	9980	MACHINE MALFUNCTION
AO	9981	BAD WEATHER
AP	9982	VANDALISM
AQ	9983	COLLECTION ERROR
AR	9984	LAB ERROR
AS	9985	POOR QUALITY ASSURANCE RESULTS
AT	9986	CALIBRATION
AU	9987	MONITORING WAIVED
AV	9988	POWER FAILURE (POWR)
AW	9989	WILDLIFE DAMAGE
AX	9990	PRECISION CHECK (PREC)
AY	9991	Q C CONTROL POINTS (ZERO/SPAN)
AZ	9992	Q C AUDIT (AUDT)
BA	9993	MAINTENANCE/ROUTINE REPAIRS
BB	9994	UNABLE TO REACH SITE
BC	9995	MULTI-POINT CALIBRATION
BD	9996	AUTO CALIBRATION
BE	9997	BUILDING/SITE REPAIR
BF	9998	PRECISION/ZERO/SPAN
BG	9966	MISSING OZONE DATA NOT LIKELY TO EXCEED LEVEL OF STANDARD
BH	9965	Interference/co-elution
BI	9964	Lost or damaged in transit
BJ	9963	Operator Error
BK	9962	Site computer/data logger down