| QACode | QAName | | ANI | Sample results for structural isomers may have contribution from their isomeric pair |
| AWM | Detection limit increased due to dilution prior to final sample volume (not a secondary dilution) |
| AY | Matrix interference suspected |
| BB | Sample > 4x spike concentration |
| BBM | Sample > 2X but less than 4X spike concentration |
| BCI | The reporting limit is elevated due to a chromatographic interference |
| BCO | Sample received in improper container |
| BDL | 0 < quantification (threshold) cycle (Cq) <= Cq Limit of Detection (LOD) |
| BE | Low surrogate recovery; analyzed twice |
| BFRE | Sample influenced by fire |
| BH | Reporting limits raised due to high level of non-target analytes |
| BITR | Insufficient taxonomic resolution to calculate CSCI |
| BLM | Compound unidentified or below the RL due to overdilution |
| BLNO | Low number of organisms, may impact CSCI calculation |
| BQC | Taxonomy External Quality Control |
| BRK | Sample not analyzed, sample container broken |
| BRKA | Sample container broken but analyzed |
| BS | Insufficient sample available to follow standard QC procedures |
| BSAL | Sample influenced by saline conditions |
| BSCR | Sample influenced by scour or suspected scour event |
| BT | Insufficient sample to perform the analysis |
| BUCM | Untested or unknown benthic macroinvertebrate collection method |
| BUTP | Sampling conducted during unrepresentative time period for CSCI calculation |
| BV | Sample received after holding time expired |
| BWIM | Portion of upstream tributary watershed for benthic macroinvertebrates is in Mexico |
| BX | Sample stored at improper temperature |
| BY | Sample received at improper temperature |
| BZ | Sample preserved improperly |
| BZ15 | Sample not filtered within 15 minutes |
| C | Pesticide result confirmed using GC/MS- EPA Flag |
| CE | Sample not homogeneous |
| CIN | Value outside confidence interval |
| CJ | Analyte concentration is in excess of the instrument calibration; considered estimated |
| CK | Initial analysis within holding time but failed QA/QC criteria |
| CN | Hydrocarbon response in diesel range but does not resemble diesel |
| CNC | Calibration nonconformances |
| CNM | DRO (C10-C28) resembles weathered diesel |
| CNP | calibration not performed |
| CQA | Concentration not reported for QA sample only % Recovery or RPD reported |
| CS | QC criteria not met due to analyte concentration near RL |
| CSG | Bacteria result calculated using a subset of grids when the filter is too concentrated |
| CT | QC criteria not met due to high level of analyte concentration |
| CVH | Continuing calibration verification high, no bias |
| CVHB | Continuing calibration verification high, high bias |
| CZM | Project sample was heterogeneous and sample homogeneity could not be readily achieved using routine laboratory practices, therefore RPD was outside the specified acceptance limits |
| D | EPA Flag - Analytes analyzed at a secondary dilution |
| DB | QA results outside of acceptance limits due to matrix effects |
| DBLOD | Detected Below Limit of Detection used for PCR analysis only |
| DBM | QC results outside of acceptance limits, associated sample result not affected since analyte was not detected or below the reporting limit. |
| DF | Reporting limits elevated due to matrix interferences |
| DG | Reporting limits elevated due to sample dilution |
| DO | Coelution |
| DRM | Spike amount less than 5X the MDL |
| DS | Batch Quality Assurance data from another project |
| DT | Method detection limit elevated |
| DV | Reporting limit elevated due to final volume of the sample extract was higher than the nominal amount |
| E | EPA Flag - Analyte exceeded the concentration range of the GC/MS |
| ERV | Exceeds reference control limits |
| EUM | LCS is outside of control limits |
| EX | Matrix spike diluted to not detectable during analysis |
| F | Sample mistakenly filtered |
| FCL | Field calibration not performed within 24 hours before use |
| FDC | Drift check not acceptable |
| FDI | Field instrument displaced but still deployed in water |
| FDO | Field instrument displaced and removed from water |
| FDP | Field duplicate RPD above QC limit |
| FDPM | Field duplicate RPD above QC limit with results >=5 xRL |
| FDR | Dry Channel |
| FDS | Dry Site |
| FEU | Equipment Unavailable |
| FI | Analyte in field sample and associated blank |
| FIA | Location was inaccessible to obtain a measurement |
| FIB | Field instrument buried |
| FIF | Instrument/Probe Failure |
| FIO | Field instrument above water level |
| FIP | Field instrument vandalized, fouled, or otherwise in poor condition |
| FIT | Invalid time. Likely instrument error or failure |
| FLV | Velocity too low to be measured |
| FNM | no documentation of the field measurement collection exists |
| FO | Estimated maximum possible concentration (EMPC) |
| FS | Too Shallow for probe measurement |
| FTD | Location was too deep to obtain a measurement |
| FTT | Water too turbid to measure |
| FUD | Unable to deploy instrument |
| FX | Analyte present in the instrument blank |
| GB | Matrix spike recovery not within control limits |
| GBC | CRM analyte recovery not within control limits |
| GC | Second column confirmation performed |
| GCA | Second column confirmation absent (not reported) |
| GD | secondary column result |
| GIDA | Isotope Dilution Analogue recovery not within control limits |
| GN | Surrogate recovery is outside of control limits |
| GR | Internal standard recovery is outside method recovery limit |
| H | A holding time violation has occurred. |
| H22 | Sample exceeds incubation period of 18-22 hours. |
| H24 | Holding time was > 24 hours for Bacteria tests only |
| H8 | Holding time was > 8 hrs but < 24 hours for Bacteria tests only |
| HB | Result positively biased |
| HD | Chromat. profile inconsistent with pattern(s) of ref. fuel stnds. |
| HH | Result exceeds linear range; concentration may be understated |
| HL | Analyte recovery above established limit |
| HM | Analyte recovery below established limit |
| HNO2 | Holding time violation occurred on the NO2 concentration used for NO3 calculation. |
| HR | Post-digestion spike |
| HS | Spike analyte recovery is outside stated control limits |
| HSM | Sampling crew or submitting agency field spike recovery not within control limits |
| HT | Analytical value calculated using results from associated tests |
| HX | Spike recovery out of limits, but QC batch considered in control |
| IDA | Isotope Dilution Analogue corrected |
| IE | Surrogate not added to this sample |
| IF | Sample result is greater than reported value |
| IL | RPD exceeds laboratory control limit |
| ILM | RSD exceeds control limit |
| ILN | Rlog exceeds control limit |
| ILO | Rlog not calculated because concentration below RL |
| IM | Method does not include this analyte as part of compound list |
| IP | Analyte detected in field or lab generated blank |
| IP10 | Analyte detected in field or lab generated blank, >RL and >1/10 amount detected in associated environmental sample |
| IP5 | Analyte detected in field or lab generated blank, >RL and >1/5 amount detected in associated environmental sample |
| IPF | Analyte detected in field blank, data validation code |
| IPMDL2 | Analyte detected in field or lab generated blank, >10% lowest detection in batch and >2.2x MDL |
| IPMDL3 | Analyte detected in field or lab generated blank, >MDL and >30% lowest detection in batch |
| IPRL | Analyte detected in field or lab generated blank, >RL |
| IS | Reporting limit elevated due to pres. of analyte in method blank |
| IU | Percent Recovery exceeds laboratory control limit |
| IZM | Bottle integrity compromised, potential contamination |
| J | Estimated value - EPA Flag |
| JA | Analyte positively identified but quantitation is an estimate |
| JDL | Estimated result lower than detection limit |
| LA | Confirmatory analysis was past holding time |
| LC | Laboratory Contamination |
| LRGN | Data rejected - Surrogate recovery not within control limits, flagged by laboratory |
| LRIL | Data rejected - RPD exceeds laboratory control limit, flagged by laboratory |
| LRIP | Data rejected - Analyte detected in field or lab generated blank, flagged by laboratory |
| LRIU | Data rejected - Percent Recovery exceeds laboratory control limit, flagged by laboratory |
| LRJ | Data rejected - Estimated value - EPA Flag, flagged by laboratory |
| LRJA | Data rejected - Analyte positively identified but quantitation is an estimate, flagged by laboratory |
| LRM | Data rejected - A matrix effect is present, flagged by laboratory |
| LRQ | Data rejected - Based on professional judgement QA/QC protocols were not met, flagged by lab |
| LST | Sample was lost or destroyed |
| M | A matrix effect is present |
| MN | Method procedures not followed |
| N | Tentatively Identified Compound |
| NAS | Not adjusted for salinity |
| NBC | Value not blank corrected |
| NC | Analyte concentration not certifiable in Certified Reference Material |
| NG | The reported result is a negative value |
| NMDL | No Method Detection Limit reported from laboratory |
| None | None - No QA Qualifier |
| NR | Not Recorded |
| NRL | No Reporting Limit reported by the laboratory |
| OA | Analyte over range when run undiluted. Diluted result below PQL |
| OL | Result may be biased high due to carry over from prior analysis |
| OV | Result is averaged |
| P | Evidence analyte present |
| PEH | Sample was preserved to extend the holding time |
| PG | Calibration verification outside control limits |
| PI | Primary and confirmation results varied by > than 40% |
| PIL | RPD is within the lab or method defined acceptance criteria, but is outside of project-specific control limits |
| PJ | Result from re-extract/re-anal to confirm original MS/MSD result |
| PJM | Result from re-extract/re-anal to confirm original result |
| PJN | Result from re-extract/re-analysis for QC purposes only |
| PP | Dilutions for BOD failed criteria of 2 mg/L diss. O2 depletion |
| PRM | Low survival in toxicity test resulted from test interference due to pathogen-related mortality |
| Q | Questionable result |
| QAX | When the native sample for the MS/MSD or DUP is not included in the batch reported |
| QG | Individual analyte exceedances allowed per NELAC |
| R | Data rejected - EPA Flag |
| RE | Elevated reporting limits due to limited sample volume |
| RLST | Replicate lost or destroyed |
| ROQ | Quantification (threshold) cycle (Cq) > Cq Lower Limit of Quantification (LLOQ), positive result |
| RQ | Spike recovery not calculated due to high concentration of analyte |
| RQM | Spike recovery not calculated due to matrix interference |
| RU | LCS rec. within marginal exceedances, 3-4 s.d. around the mean. |
| RUM | Acceptable QC with marginal exceedance |
| RY | Standard Instrument related QC exceeds the control limits |
| RYM | Reporting Limit check standard failed laboratory defined acceptance criteria. Data is accepted based on passing method required QC |
| S | Sample Receipt nonconformance |
| SC | Surrogate Corrected Value |
| SCR | Screening level analysis |
| SLM | Analyte results for R1 and/or R2 were lower than 10 times the MDL, therefore RPD acceptance limits do not apply |
| SN | See narrative and/or special notes |
| SSM | Second source recovery below method control limit |
| TA | Ammonia precision or accuracy exceeds laboratory control limit |
| TAC | Alternative control used in toxicity statistical analysis |
| TAD | Additional metamorphosized or pupated organism accidently included in statistical analysis |
| TAE | Test organisms exceed age limit at test initiation |
| TAF | Test organisms exceed the maximum weight requirement at test initiation |
| TAS | Alternate species tested |
| TC | Conductivity precision or accuracy exceeds laboratory control limit |
| TCF | Alternative control does not meet test acceptability criteria |
| TCI | Conductivity insufficient for test species |
| TCT | Conductivity tolerance exceeded for test species |
| TD | DO precision or accuracy exceeds laboratory control limit |
| TEM | Endpoint not analyzed or reported by the laboratory |
| TH | Hardness precision or accuracy exceeds laboratory control limit |
| THS | Hydrogen sulfide precision or accuracy exceeds laboratory control limit |
| TK | Alkalinity precision or accuracy exceeds laboratory control limit |
| TL | Minor deviation in temperature or light (comment) |
| TMM | Male replicate excluded from test analysis |
| TMO | Test organisms escaped or are otherwise missing |
| TMSD | Endpoint considered not toxic; per EPA method, when both the relative difference from control and the test percent minimum significant difference (PMSD) are less than EPA lower PMSD bound (10th percentile) |
| TNC | Too numerous to count |
| TNS | Only neonate counts from surviving adults were used in the analysis |
| TOQ | Number of organisms in a toxicity test do not meet the minimum quantity per replicate at test initiation or an unequal quantity of organisms per replicate is used |
| TP | pH precision or accuracy exceeds laboratory control limit |
| TR | Test conditions not acceptable (temp, light) |
| TRT | Reference toxicant test failed due to control survival less than 80% |
| TS | Salinity precision or accuracy exceeds laboratory control limit |
| TW | Water quality parameters outside recommended test method ranges |
| TWN | Required water quality parameters not measured |
| TXP | Toxaphene results are based on a commercial Toxaphene mixture of unknown composition and therefore the concentrations listed in this report are estimated |
| UF | Counts outside acceptable range. |
| UJ | Analyte was not detected above the reported sample quantitation limit.Reported quantitation limit is approx. & may not represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample. |
| UKM | Lock mass interference present |
| ULM | Analyte detected in associated bottle blank check |
| UOL | Result determined to be an outlier at the time of data validation |
| UPM | Field duplicate exceeds QC limit with results < 5 x RL. Absolute difference is > RL |
| UT | Sample value was blank corrected |
| VBB | Sample > 4x spike concentration, flagged by QAO |
| VBS | Insufficient sample available to follow standard QC procedures, flagged by QAO |
| VBY | Sample received at improper temperature, flagged by QAO |
| VBZ | Sample preserved improperly, flagged by QAO |
| VBZ15 | Sample not filtered within 15 minutes, flagged by QAO |
| VC | Result was calculated by DMT when not provided for DNQ ResQualCode, value 1/2 distance between MDL and RL, flagged by QAO |
| VCJ | Analyte concentration is in excess of the instrument calibration; considered estimated, flagged by QAO |
| VCO | Sample analyte concentration detectable but <5X blank concentration (contamination), flagged by QAO |
| VCQ | Analyte concentration >10X blank concentration |
| VCR | Sample analyte concentration >5X blank concentration (True hit), flagged by QAO |
| VCS | QC criteria not met due to analyte concentration near RL, flagged by QAO |
| VD | EPA Flag - Analytes analyzed at a secondary dilution, flagged by QAO |
| VDG | Reporting limits elevated due to sample dilution, flagged by QAO |
| VEUM | LCS/LCM recovery not within control limits, flagged by QAO |
| VFCL | Field calibration not performed within 24 hours before use, flagged by QAO |
| VFDP | Field duplicate RPD above QC limit;flagged by QAO |
| VFIF | Instrument/Probe Failure, flagged by QAO |
| VFIRL | Invalid RL, suspected laboratory transcription error, flagged by QAO |
| VGB | Matrix spike recovery not within control limits, flagged by QAO |
| VGBC | CRM recovery not within control limits, flagged by QAO |
| VGN | Surrogate recovery not within control limits, flagged by QAO |
| VH | Holding time violation occurred, flagged by QAO |
| VH24 | Holding time was > 24 hours for Bacteria tests only, flagged by QAO |
| VH8 | Holding time was > 8 hrs but < 24 hours for Bacteria tests only, flagged by QAO |
| VHB | Result positively biased, flagged by QAO |
| VHS | Spike analyte recovery is outside stated control limits, flagged by QAO |
| VIL | RPD exceeds control limit, flagged by QAO |
| VIP | Analyte detected in field or lab generated blank, flagged by QAO |
| VIP5 | Analyte detected in field or lab generated blank, >RL and >1/5 amount detected in associated environmental sample, flagged by QAO |
| VIPF | Analyte detected in field blank, data validation code, flagged by QAO |
| VIPMDL2 | Analyte detected in field or lab generated blank, >10% lowest detection in batch and >2.2x MDL, flagged by QAO |
| VIPMDL3 | Analyte detected in field or lab generated blank, >MDL and >30% lowest detection in batch, flagged by QAO |
| VIPRL | Analyte detected in field or lab generated blank, >RL, flagged by QAO |
| VIU | Percent Recovery exceeds laboratory control limit, flagged by QAO |
| VJ | Estimated value - EPA Flag, flagged by QAO |
| VLB | Result negatively biased, flagged by QAO |
| VLMQO | Data did not meet laboratory MQO, but met project MQO, flagged by QAO |
| VM | A matrix effect is present, flagged by QAO |
| VNC | Analyte concentration not certifiable in Certified Reference Material, flagged by QAO |
| VNMDL | No Method Detection Limit reported from laboratory, flagged by QAO |
| VOL | Result may be biased high due to carry over from prior analysis, flagged by QAO |
| VPJM | Result from re-extract/re-anal to confirm original result, flagged by QAO |
| VPMQO | Data met laboratory MQO, but did not meet project MQO, flagged by QAO |
| VQ | Questionable result, flagged by QAO |
| VQAX | When the native sample for the MS/MSD or DUP is not included in the batch reported, flagged by QAO |
| VQCA | QA/QC protocols were not met for accuracy, flagged by QAO |
| VQCP | QA/QC protocols were not met for precision, flagged by QAO |
| VQN | No QA/QC performed or performed but not reported, used with historical data, Batch comment required |
| VR | Data rejected - EPA Flag, flagged by QAO |
| VRE | Elevated reporting limits due to limited sample volume, flagged by QAO |
| VREL | Reporting limits elevated due to change in lab capabilities, flagged by QAO |
| VRIL | Data rejected - RPD exceeds control limit, flagged by QAO |
| VRIP | Data rejected - Analyte detected in field or lab generated blank, flagged by QAO |
| VRIU | Data rejected - Percent Recovery exceeds laboratory control limit, flagged by QAO |
| VRVQ | Data rejected - Based on professional judgement QA/QC protocols were not met, flagged by QAO |
| VS | Sample Receipt nonconformance, flagged by QAO |
| VSCR | Screening level analysis, flagged by QAO |
| VTNC | Too numerous to count, flagged by QAO |
| VTW | Water quality parameters outside recommended test method ranges, flagged by QAO |
| VVQ | Based on professional judgement QA/QC protocols were not met, flagged by QAO |
| WE | Sample filtered immediately upon receipt by the laboratory. |
| XI | Hydrocarbon response in motor oil range but does not resemble motor oil |