<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE EPA_Data_Qualifier_Codes>

<EPA_Data_Qualifier_Codes version="1.0">
   <Data_Qualifier id="1" description="Deviation from a CFR/Critical Criteria Requirement" />
   <Data_Qualifier id="2" description="Operational Deviation" />
   <Data_Qualifier id="3" description="Field Issue" />
   <Data_Qualifier id="4" description="Lab Issue" />
   <Data_Qualifier id="5" description="Outlier" />
   <Data_Qualifier id="6" description="QAPP Issue" />
   <Data_Qualifier id="7" description="Below Lowest Calibration Level" />
   <Data_Qualifier id="8" description="QA/QC Unknown" />
   <Data_Qualifier id="9" description="Negative value detected - zero reported" />
   <Data_Qualifier id="A" description="High Winds" />
   <Data_Qualifier id="B" description="Stratospheric Ozone Intrusion" />
   <Data_Qualifier id="C" description="Volcanic Eruption" />
   <Data_Qualifier id="CB" description="Values have been Blank Corrected" />
   <Data_Qualifier id="CC" description="Clean Canister Residue" />
   <Data_Qualifier id="CL" description="Surrogate Recoveries Outside Control Limits due to analytical interferences" />
   <Data_Qualifier id="D" description="Sandblasting" />
   <Data_Qualifier id="E" description="Forest Fire" />
   <Data_Qualifier id="EH" description="Estimated;  Exceeds Upper Range" />
   <Data_Qualifier id="F" description="Structural Fire" />
   <Data_Qualifier id="FB" description="Field Blank Value Above Acceptable Limit" />
   <Data_Qualifier id="G" description="High Pollen Count" />
   <Data_Qualifier id="H" description="Chem. Spills &amp; Indust. Accidents" />
   <Data_Qualifier id="HT" description="Sample pick-up hold time exceeded; data questionable" />
   <Data_Qualifier id="I" description="Unusual Traffic Congestion" />
   <Data_Qualifier id="IA" description="African Dust" />
   <Data_Qualifier id="IB" description="Asian Dust" />
   <Data_Qualifier id="IC" description="Chem. Spills &amp; Indust Accidents" />
   <Data_Qualifier id="ID" description="Cleanup After a Major Disaster" />
   <Data_Qualifier id="IE" description="Demolition" />
   <Data_Qualifier id="IF" description="Fire - Canadian" />
   <Data_Qualifier id="IG" description="Fire - Mexico/Central America " />
   <Data_Qualifier id="IH" description="Fireworks" />
   <Data_Qualifier id="II" description="High Pollen Count" />
   <Data_Qualifier id="IJ" description="High Winds" />
   <Data_Qualifier id="IK" description="Infrequent Large Gatherings" />
   <Data_Qualifier id="IL" description="Other" />
   <Data_Qualifier id="IM" description="Prescribed Fire" />
   <Data_Qualifier id="IN" description="Seismic Activity" />
   <Data_Qualifier id="IO" description="Stratospheric Ozone Intrusion" />
   <Data_Qualifier id="IP" description="Structural Fire" />
   <Data_Qualifier id="IQ" description="Terrorist Act" />
   <Data_Qualifier id="IR" description="Unique Traffic Disruption" />
   <Data_Qualifier id="IS" description="Volcanic Eruptions" />
   <Data_Qualifier id="IT" description="Wildfire-U. S." />
   <Data_Qualifier id="IU" description="Wildland Fire Use Fire-U. S." />
   <Data_Qualifier id="J" description="Construction/Demolition" />
   <Data_Qualifier id="K" description="Agricultural Tilling" />
   <Data_Qualifier id="L" description="Highway Construction" />
   <Data_Qualifier id="LB" description="Lab blank value above acceptable limit" />
   <Data_Qualifier id="LJ" description="Identification Of Analyte Is Acceptable; Reported Value Is An Estimate" />
   <Data_Qualifier id="LK" description="Analyte Identified; Reported Value May Be Biased High" />
   <Data_Qualifier id="LL" description="Analyte Identified; Reported Value May Be Biased Low" />
   <Data_Qualifier id="M" description="Rerouting of Traffic" />
   <Data_Qualifier id="MD" description="Value less than MDL" />
   <Data_Qualifier id="MS" description="Value reported is 1/2 MDL substituted" />
   <Data_Qualifier id="MX" description="Matrix Effect" />
   <Data_Qualifier id="N" description="Sanding/Salting of Streets" />
   <Data_Qualifier id="ND" description="No Value Detected" />
   <Data_Qualifier id="NS" description="Influenced by nearby source" />
   <Data_Qualifier id="O" description="Infrequent Large Gatherings" />
   <Data_Qualifier id="P" description="Roofing Operations" />
   <Data_Qualifier id="PQ" description="Values Between PQL And MDL" />
   <Data_Qualifier id="Q" description="Prescribed Burning" />
   <Data_Qualifier id="R" description="Cleanup After a Major Disaster" />
   <Data_Qualifier id="RA" description="African Dust" />
   <Data_Qualifier id="RB" description="Asian Dust" />
   <Data_Qualifier id="RC" description="Chem. Spills &amp; Indust. Accidents" />
   <Data_Qualifier id="RD" description="Cleanup After a Major Disaster" />
   <Data_Qualifier id="RE" description="Demolition" />
   <Data_Qualifier id="RF" description="Fire - Canadian" />
   <Data_Qualifier id="RG" description="Fire - Mexico/Central America " />
   <Data_Qualifier id="RH" description="Fireworks" />
   <Data_Qualifier id="RI" description="High Pollen Count" />
   <Data_Qualifier id="RJ" description="High Winds" />
   <Data_Qualifier id="RK" description="Infrequent Large Gatherings" />
   <Data_Qualifier id="RL" description="Other" />
   <Data_Qualifier id="RM" description="Prescribed Fire" />
   <Data_Qualifier id="RN" description="Seismic Activity" />
   <Data_Qualifier id="RO" description="Stratospheric Ozone Intrusion" />
   <Data_Qualifier id="RP" description="Structural Fire" />
   <Data_Qualifier id="RQ" description="Terrorist Act" />
   <Data_Qualifier id="RR" description="Unique Traffic Disruption" />
   <Data_Qualifier id="RS" description="Volcanic Eruptions" />
   <Data_Qualifier id="RT" description="Wildfire-U. S." />
   <Data_Qualifier id="RU" description="Wildland Fire Use Fire-U. S." />
   <Data_Qualifier id="S" description="Seismic Activity" />
   <Data_Qualifier id="SQ" description="Values Between SQL and MDL" />
   <Data_Qualifier id="SS" description="Value substituted from secondary monitor" />
   <Data_Qualifier id="SX" description="Does Not Meet Siting Criteria" />
   <Data_Qualifier id="T" description="Multiple PM2.5 Validity Flags" />
   <Data_Qualifier id="TB" description="Trip Blank Value Above Acceptable Limit" />
   <Data_Qualifier id="U" description="Sahara Dust" />
   <Data_Qualifier id="V" description="Validated Value" />
   <Data_Qualifier id="VB" description="Value below normal; no reason to invalidate" />
   <Data_Qualifier id="W" description="Flow Rate Average out of Spec." />
   <Data_Qualifier id="X" description="Filter Temperature Difference out of Spec." />
   <Data_Qualifier id="Y" description="Elapsed Sample Time out of Spec." />
   <Data_Qualifier id="Z" description="Other event" />
</EPA_Data_Qualifier_Codes>
