| QACode | QAName | LastUpdateDate | | ANI | Sample results for structural isomers may have contribution from their isomeric pair | 2022-03-18 |
| ART | Above rating table. Flows are higher than a conversion table, a flow was not calculated. | 2025-09-04 |
| AUDE | Toxicity test endpoint data of unknown quality | 2021-05-20 |
| AUDW | Water parameter data of unknown quality | 2021-05-20 |
| AWM | Detection limit increased due to dilution prior to final sample volume (not a secondary dilution) | 2014-11-19 |
| AY | Matrix interference suspected | 2014-06-09 |
| B | Analyte found in reagent blank, indicates possible reagent or background contamination | 2020-10-13 |
| BB | Sample > 4x spike concentration | 2010-03-17 |
| BBM | Sample > 2X but less than 4X spike concentration | 2010-03-17 |
| BCI | The reporting limit is elevated due to a chromatographic interference | 2020-01-30 |
| BCO | Sample received in improper container | 2022-02-14 |
| BDL | 0 < quantification (threshold) cycle (Cq) <= Cq Limit of Detection (LOD) | 2018-04-23 |
| BE | Low surrogate recovery; analyzed twice | 2011-12-01 |
| BFRE | Sample influenced by fire | 2021-04-05 |
| BH | Reporting limits raised due to high level of non-target analytes | 2017-05-25 |
| BITR | Insufficient taxonomic resolution to calculate CSCI | 2021-04-05 |
| BLM | Compound unidentified or below the RL due to overdilution | 2010-03-17 |
| BLNO | Low number of organisms, may impact CSCI calculation | 2021-04-05 |
| BNTX | Sample did not contain organisms for taxonomic identification needed to conduct calculations | 2021-12-31 |
| BQC | Taxonomy External Quality Control | 2017-04-19 |
| BRK | Sample not analyzed, sample container broken | 2020-10-30 |
| BRKA | Sample container broken but analyzed | 2010-03-17 |
| BS | Insufficient sample available to follow standard QC procedures | 2010-03-17 |
| BSAL | Sample influenced by saline conditions | 2021-04-05 |
| BSCR | Sample influenced by scour or suspected scour event | 2021-12-31 |
| BT | Insufficient sample to perform the analysis | 2010-03-17 |
| BUCM | Untested or unknown benthic macroinvertebrate collection method | 2021-04-05 |
| BUTP | Sampling conducted during unrepresentative time period for CSCI calculation | 2021-04-05 |
| BV | Sample received after holding time expired | 2010-03-17 |
| BWIM | Portion of upstream tributary watershed for benthic macroinvertebrates is in Mexico | 2021-04-05 |
| BX | Sample stored at improper temperature | 2010-03-17 |
| BY | Sample received at improper temperature | 2010-03-17 |
| BZ | Sample preserved improperly | 2010-03-17 |
| BZ15 | Sample not filtered within 15 minutes | 2014-07-16 |
| C | Pesticide result confirmed using GC/MS- EPA Flag | 2010-06-11 |
| CE | Sample not homogeneous | 2010-06-03 |
| CFA | Conversion factor applied to value to maintain comparability with historic dataset measured using a different digest/extract or analytical method | 2024-09-10 |
| CIN | Value outside confidence interval | 2012-03-11 |
| CJ | Analyte concentration is in excess of the instrument calibration; considered estimated | 2011-12-01 |
| CK | Initial analysis within holding time but failed QA/QC criteria | 2020-01-14 |
| CN | Hydrocarbon response in diesel range but does not resemble diesel | 2019-05-29 |
| CNC | Calibration nonconformances | 2019-05-29 |
| CNM | DRO (C10-C28) resembles weathered diesel | 2018-07-05 |
| CNP | calibration not performed | 2013-01-09 |
| CQA | Concentration not reported for QA sample only % Recovery or RPD reported | 2010-03-17 |
| CS | QC criteria not met due to analyte concentration near RL | 2010-03-17 |
| CSG | Bacteria result calculated using a subset of grids when the filter is too concentrated | 2015-01-20 |
| CT | QC criteria not met due to high level of analyte concentration | 2010-03-17 |
| CVH | CONTINUING CALIBRATION VERIFICATION HIGH, NO BIAS | 2015-07-20 |
| CVHB | CONTINUING CALIBRATION VERIFICATION HIGH, HIGH BIAS | 2015-07-20 |
| CVL | CONTINUING CALIBRATION VERIFICATION LOW, NO BIAS | 2015-07-20 |
| CVLB | CONTINUING CALIBRATION VERIFICATION LOW, LOW BIAS | 2015-07-20 |
| 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 | 2015-03-10 |
| D | EPA Flag - Analytes analyzed at a secondary dilution | 2010-03-17 |
| DB | QA results outside of acceptance limits due to matrix effects | 2010-03-17 |
| DBLOD | Detected Below Limit of Detection used for PCR analysis only | 2017-04-18 |
| DBM | QC results outside of acceptance limits, associated sample result not affected since analyte was not detected or below the reporting limit. | 2016-10-25 |
| DF | Reporting limits elevated due to matrix interferences | 2010-03-17 |
| DG | reporting limits elevated due to sample dilution | 2011-05-12 |
| DO | Coelution | 2010-03-17 |
| DRL | Spike concentration is less than RL | 2024-08-05 |
| DRM | Spike amount less than 5X the MDL | 2010-03-17 |
| DS | Batch Quality Assurance data from another project | 2010-03-17 |
| DT | Method detection limit elevated | 2016-05-17 |
| DV | Reporting limit elevated due to final volume of the sample extract was higher than the nominal amount | 2020-09-08 |
| E | EPA Flag - Analyte exceeded the concentration range of the GC/MS | 2020-01-10 |
| EDTA | EDTA added to Selenastrum capricornutum toxicity test | 2019-07-17 |
| ERV | Exceeds reference control limits | 2012-04-20 |
| EUM | LCS is outside of control limits | 2011-08-03 |
| EX | Matrix spike diluted to not detectable during analysis | 2016-09-13 |
| F | Sample mistakenly filtered | 2010-03-17 |
| FCL | Field calibration not performed within 24 hours before use | 2010-03-17 |
| FDC | Drift check not acceptable | 2010-03-17 |
| FDI | Field instrument displaced but still deployed in water | 2014-09-23 |
| FDO | Field instrument displaced and removed from water | 2014-09-23 |
| FDP | Field duplicate RPD above QC limit | 2010-03-17 |
| FDPM | Field duplicate RPD above QC limit with results >=5 xRL | 2019-08-22 |
| FDR | Dry Channel | 2010-03-17 |
| FDS | Dry Site | 2011-09-01 |
| FEU | Equipment Unavailable | 2010-03-17 |
| FI | Analyte in field sample and associated blank | 2018-07-27 |
| FIA | Location was inaccessible to obtain a measurement | 2010-03-17 |
| FIB | Field instrument buried | 2014-09-23 |
| FIF | Instrument/Probe Failure | 2010-03-17 |
| FINR | Field data collected while probe is not recording analyte or calibrating | 2024-02-01 |
| FIO | Field instrument above water level | 2014-09-23 |
| FIP | Field instrument vandalized, fouled, or otherwise in poor condition | 2014-09-23 |
| FIT | Invalid time. ?Likely instrument error or failure | 2014-02-04 |
| FIV | Invalid velocity. ?Likely instrument error or failure | 2014-02-04 |
| FLV | Velocity too low to be measured | 2010-03-17 |
| FNM | no documentation of the field measurement collection exists | 2010-03-17 |
| FO | Estimated maximum possible concentration (EMPC) | 2013-07-08 |
| FS | Too Shallow for probe measurement | 2010-03-17 |
| FTD | Location was too deep to obtain a measurement | 2010-03-17 |
| FTT | Water too turbid to measure | 2013-01-02 |
| FUD | Unable to deploy instrument | 2010-03-17 |
| FX | Analyte present in the instrument blank | 2010-03-17 |
| GB | Matrix spike recovery not within control limits | 2010-03-17 |
| GBC | CRM analyte recovery not within control limits | 2010-03-17 |
| GBM | Matrix spike recovery is out of QC limit, but matrix spike duplicate recovery is acceptable | 2020-10-13 |
| GC | Second column confirmation performed | 2010-03-17 |
| GCA | Second column confirmation absent (not reported) | 2015-01-02 |
| GD | secondary column result | 2010-03-17 |
| GIDA | Isotope Dilution Analogue recovery not within control limits | 2022-02-18 |
| GN | Surrogate recovery is outside of control limits | 2010-03-17 |
| GR | Internal standard recovery is outside method recovery limit | 2010-03-17 |
| H | A holding time violation has occurred. | 2010-03-17 |
| H22 | Sample exceeds incubation period of 18-22 hours. | 2010-11-22 |
| H24 | Holding time was > 24 hours for Bacteria tests only | 2010-03-17 |
| H8 | Holding time was > 8 hrs but < 24 hours for Bacteria tests only | 2013-01-17 |
| HB | Result positively biased | 2015-03-26 |
| HD | Chromat. profile inconsistent with pattern(s) of ref. fuel stnds. | 2016-12-23 |
| HH | Result exceeds linear range; concentration may be understated | 2011-12-01 |
| HL | Analyte recovery above established limit | 2019-05-14 |
| HM | Analyte recovery below established limit | 2019-05-14 |
| HNO2 | Holding time violation occurred on the NO2 concentration used for NO3 calculation. | 2010-04-13 |
| HR | Post-digestion spike | 2010-03-17 |
| HS | Spike analyte recovery is outside stated control limits | 2008-01-01 |
| HSM | Sampling crew or submitting agency field spike recovery not within control limits | 2019-10-09 |
| HT | Analytical value calculated using results from associated tests | 2010-03-17 |
| HX | Spike recovery out of limits, but QC batch considered in control | 2019-05-14 |
| IDA | Isotope Dilution Analogue corrected | 2022-02-18 |
| IE | Surrogate not added to this sample | 2010-03-17 |
| IF | Sample result is greater than reported value | 2010-03-17 |
| IL | RPD exceeds laboratory control limit | 2010-03-17 |
| ILM | RSD exceeds control limit | 2013-03-19 |
| ILN | Rlog exceeds control limit | 2014-02-11 |
| ILO | Rlog not calculated because concentration below RL | 2015-08-18 |
| IM | Method does not include this analyte as part of compound list | 2010-03-17 |
| IP | Analyte detected in field or lab generated blank | 2012-06-18 |
| IP10 | Analyte detected in field or lab generated blank, >RL and >1/10 amount detected in associated environmental sample | 2019-06-03 |
| IP5 | Analyte detected in field or lab generated blank, >RL and >1/5 amount detected in associated environmental sample | 2012-06-21 |
| IPF | Analyte detected in field blank, data validation code | 2020-03-18 |
| IPMDL2 | Analyte detected in field or lab generated blank, >10% lowest detection in batch and >2.2x MDL | 2012-06-21 |
| IPMDL3 | Analyte detected in field or lab generated blank, >MDL and >30% lowest detection in batch | 2012-06-21 |
| IPND | Result not distinguishable from lab blank contamination, data validation code | 2020-03-18 |
| IPRL | Analyte detected in field or lab generated blank, >RL | 2012-06-21 |
| IS | Reporting limit elevated due to pres. of analyte in method blank | 2010-03-17 |
| IU | Percent Recovery exceeds laboratory control limit | 2008-01-01 |
| IZM | Bottle integrity compromised, potential contamination | 2012-10-17 |
| J | Estimated value - EPA Flag | 2010-03-17 |
| JA | Analyte positively identified but quantitation is an estimate | 2010-03-17 |
| JBO | Estimated BOD result due to over-depletion | 2025-09-16 |
| JBU | Estimated BOD result due to under-depletion, highest volume replicate reported | 2025-09-16 |
| JDL | Estimated result lower than detection limit | 2016-04-14 |
| K | Peak detected, but did not meet quantification criteria, value represents estimated maximum concentration | 2023-12-19 |
| LA | Confirmatory analysis was past holding time | 2020-01-14 |
| LB | Result negatively biased | 2016-06-07 |
| LC | Laboratory Contamination | 2010-03-17 |
| LDP | Laboratory duplicate RPD exceeds control limit | 2025-09-16 |
| LRGN | Data rejected - Surrogate recovery not within control limits, flagged by laboratory | 2012-04-23 |
| LRIL | Data rejected - RPD exceeds laboratory control limit, flagged by laboratory | 2012-08-13 |
| LRIP | Data rejected - Analyte detected in field or lab generated blank, flagged by laboratory | 2012-06-18 |
| LRIU | Data rejected - Percent Recovery exceeds laboratory control limit, flagged by laboratory | 2011-08-22 |
| LRJ | Data rejected - Estimated value - EPA Flag, flagged by laboratory | 2011-08-22 |
| LRJA | Data rejected - Analyte positively identified but quantitation is an estimate, flagged by laboratory | 2012-09-20 |
| LRM | Data rejected - A matrix effect is present, flagged by laboratory | 2011-08-22 |
| LRQ | Data rejected - Based on professional judgement QA/QC protocols were not met, flagged by lab | 2011-08-22 |
| LST | Sample was lost or destroyed | 2010-03-17 |
| M | A matrix effect is present | 2010-03-17 |
| MAL | Male Adult | 1900-01-01 |
| MBM | Method (lab generated) blank missing from batch | 2023-09-27 |
| MBP | Method (lab generated) blank did not go through entire preparation and analytical process | 2023-09-27 |
| MN | Method procedures not followed | 2010-03-17 |
| MOI | No associated % moisture results and therefore should not be compared to dry weight thresholds | 2023-03-16 |
| N | Tentatively Identified Compound | 2010-03-17 |
| NAS | Not adjusted for salinity | 2016-12-15 |
| NBC | Value not blank corrected | 2008-08-11 |
| NC | Analyte concentration not certifiable in Certified Reference Material | 2010-03-17 |
| NG | The reported result is a negative value | 2012-02-16 |
| NIDA | Result not Isotope Dilution Analogue corrected | 2025-09-29 |
| NMDL | No Method Detection Limit reported from laboratory | 2010-03-17 |
| None | None - No QA Qualifier | 2010-03-17 |
| NR | Not Recorded | 2010-03-17 |
| NRL | No Reporting Limit reported by the laboratory | 2010-04-07 |
| NTR | Not Total Recovery: Method typically provides <50% recovery of analyte in native samples despite good recovery in spiked samples. | 2012-11-07 |
| OA | Analyte over range when run undiluted. Diluted result below PQL | 2011-04-06 |
| OL | Result may be biased high due to carry over from prior analysis | 2019-03-13 |
| OV | Result is averaged | 2010-03-17 |
| P | Evidence analyte present | 2010-03-17 |
| PEH | Sample was preserved to extend the holding time | 2020-01-07 |
| PG | Calibration verification outside control limits | 2010-03-17 |
| PGN | Surrogate recovery is within the lab or method defined acceptance criteria, but is outside of project-specific control limits | 2022-01-14 |
| PI | Primary and confirmation results varied by > than 40% | 2010-03-17 |
| PIL | RPD is within the lab or method defined acceptance criteria, but is outside of project-specific control limits | 2022-03-10 |
| PJ | Result from re-extract/re-anal to confirm original MS/MSD result | 2010-03-17 |
| PJM | Result from re-extract/re-anal to confirm original result | 2010-03-17 |
| PJN | Result from re-extract/re-analysis for QC purposes only | 2010-03-17 |
| PMQO | Data met laboratory MQO, but did not meet project MQO | 2024-05-03 |
| PP | Dilutions for BOD failed criteria of 2 mg/L diss. O2 depletion | 2011-05-12 |
| PRM | Low survival in toxicity test resulted from test interference due to pathogen-related mortality | 2012-12-12 |
| PUM | LCS recovery is within the lab or method defined acceptance criteria, but is outside of project-specific control limits | 2022-01-14 |
| Q | Questionable result | 2010-03-17 |
| QAX | When the native sample for the MS/MSD or DUP is not included in the batch reported | 2010-03-17 |
| QG | Individual analyte exceedances allowed per NELAC | 2013-11-07 |
| R | Data rejected - EPA Flag | 2010-03-17 |
| RCI | The method detection limit is elevated due to chromatographic interference; MDL is reported as equal to RL | 2024-12-06 |
| RE | Elevated reporting limits due to limited sample volume | 2010-03-17 |
| REL | Reporting limits elevated above QAPP targets due to change in identified lab capabilities over course of project implementation. | 2015-06-04 |
| RIP | RIP;see individual QADescr for complete definition | 1900-01-01 |
| RIU | RIU;see individual QADescr for complete definition | 1900-01-01 |
| RJ | RJ;see individual QADescr for complete definition | 1900-01-01 |
| RLST | Replicate lost or destroyed | 2016-08-01 |
| RMDL | Data rejected - Spike concentration is less than MDL | 2024-08-16 |
| ROQ | Quantification (threshold) cycle (Cq) > Cq Lower Limit of Quantification (LLOQ), positive result | 2018-03-20 |
| RPV | Sample failed to meet representativeness requirements | 1900-01-01 |
| RQ | Spike recovery not calculated due to high concentration of analyte | 2014-07-22 |
| RQM | Spike recovery not calculated due to matrix interference | 2019-05-14 |
| RU | LCS rec. within marginal exceedances, 3-4 s.d. around the mean. | 2017-05-25 |
| RUM | Acceptable QC with marginal exceedance | 2020-01-29 |
| RY | Standard Instrument related QC exceeds the control limits | 2016-09-19 |
| RYM | Reporting Limit check standard failed laboratory defined acceptance criteria. Data is accepted based on passing method required QC | 2018-10-31 |
| S | Sample Receipt nonconformance | 2017-10-13 |
| SC | Surrogate Corrected Value | 2010-03-17 |
| SCR | Screening level analysis | 2010-03-17 |
| SH | Accuracy and/or precision limits do not apply because analyte concentration in sample was greater than the spike concentration | 2025-09-16 |
| SLM | Analyte results for R1 and/or R2 were lower than 10 times the MDL, therefore RPD acceptance limits do not apply | 2014-06-04 |
| SN | See narrative and/or special notes | 2020-02-20 |
| SSM | Second source recovery below method control limit | 2020-02-12 |
| TA | Ammonia precision or accuracy exceeds laboratory control limit | 2010-03-17 |
| TAB | Test organisms do not meet the minimum age limit at test initiation | 2021-10-12 |
| TAC | Alternative control used in toxicity statistical analysis | 2013-10-31 |
| TAD | Additional metamorphosized or pupated organism accidently included in statistical analysis | 2022-02-18 |
| TAE | Test organisms exceed age limit at test initiation | 2018-02-15 |
| TAF | Test organisms exceed the maximum weight requirement at test initiation | 2022-04-06 |
| TAM | Toxicity test organism age at test start is not recorded | 2021-07-22 |
| TAS | Alternate species tested | 2024-02-02 |
| TC | Conductivity precision or accuracy exceeds laboratory control limit | 2010-03-17 |
| TCF | Alternative control does not meet test acceptability criteria | 2018-02-15 |
| TCI | Conductivity insufficient for test species | 2010-03-17 |
| TCT | Conductivity tolerance exceeded for test species | 2010-03-17 |
| TD | DO precision or accuracy exceeds laboratory control limit | 2010-03-17 |
| TEM | Endpoint not analyzed or reported by the laboratory | 2023-01-19 |
| TH | Hardness precision or accuracy exceeds laboratory control limit | 2010-03-17 |
| THS | Hydrogen sulfide precision or accuracy exceeds laboratory control limit | 2010-03-17 |
| TK | Alkalinity precision or accuracy exceeds laboratory control limit | 2012-06-05 |
| TL | Minor deviation in temperature or light (comment) | 2010-03-17 |
| TMM | Male replicate excluded from test analysis | 2022-03-15 |
| TMO | Test organisms escaped or are otherwise missing | 2019-10-07 |
| 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) | 2023-08-18 |
| TNC | Too numerous to count | 2013-03-19 |
| TNS | Only neonate counts from surviving adults were used in the analysis | 2010-03-17 |
| 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 | 2015-07-10 |
| TP | pH precision or accuracy exceeds laboratory control limit | 2010-03-17 |
| TR | Test conditions not acceptable (temp, light) | 2010-03-17 |
| TRT | Reference toxicant test failed due to control survival less than 80% | 2019-12-28 |
| TS | Salinity precision or accuracy exceeds laboratory control limit | 2010-03-17 |
| TW | Water quality parameters outside recommended test method ranges | 2010-03-17 |
| TWN | Required water quality parameters not measured | 2017-12-08 |
| TXP | Toxaphene results are based on a commercial Toxaphene mixture of unknown composition and therefore the concentrations listed in this report are estimated | 2019-06-11 |
| UF | Counts outside acceptable range. | 2016-11-18 |
| 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. | 2010-03-17 |
| UKM | Lock mass interference present | 2012-10-01 |
| ULM | Analyte detected in associated bottle blank check | 2014-05-21 |
| UOL | Result determined to be an outlier at the time of data validation | 2015-08-13 |
| UPM | Field duplicate exceeds QC limit with results < 5 x RL. Absolute difference is > RL | 2019-08-22 |
| UT | Sample value was blank corrected | 2020-08-10 |
| VBB | Sample > 4x spike concentration, flagged by QAO | 2013-09-13 |
| VBCO | Sample received in improper container, flagged by QAO | 2025-01-06 |
| VBLM | Compound unidentified or below the RL due to overdilution, flagged by QAO | 1900-01-01 |
| VBS | Insufficient sample available to follow standard QC procedures, flagged by QAO | 2011-08-22 |
| VBT | Insufficient sample to perform the analysis, flagged by QAO | 2022-08-18 |
| VBY | Sample received at improper temperature, flagged by QAO | 2010-03-17 |
| VBZ | Sample preserved improperly, flagged by QAO | 2010-05-26 |
| VBZ15 | Sample not filtered within 15 minutes, flagged by QAO | 2015-02-26 |
| VC | Result was calculated by DMT when not provided for DNQ ResQualCode, value 1/2 distance between MDL and RL, flagged by QAO | 2010-03-17 |
| VCIN | Value outside confidence interval, flagged by QAO | 2022-03-14 |
| VCJ | Analyte concentration is in excess of the instrument calibration; considered estimated, flagged by QAO | 2013-09-08 |
| VCO | Sample analyte concentration detectable but <5X blank concentration (contamination), flagged by QAO | 2011-08-29 |
| VCQ | analyte concentration >10X blank concentration | 2011-05-12 |
| VCR | Sample analyte concentration >5X blank concentration (True hit), flagged by QAO | 2011-08-29 |
| VCS | QC criteria not met due to analyte concentration near RL, flagged by QAO | 2019-03-13 |
| VD | EPA Flag - Analytes analyzed at a secondary dilution, flagged by QAO | 2012-03-22 |
| VDBM | The QC results were outside of acceptance limits, associated sample result not affected since analyte was not detected or below the reporting limit, flagged by QAO | 2025-08-26 |
| VDG | Reporting limits elevated due to sample dilution, flagged by QAO | 2019-03-13 |
| VDO | Coelution; flagged by QAO | 2012-11-14 |
| VDRL | Spike concentration is less than RL, flagged by QAO | 2024-08-05 |
| VDS | Batch Quality Assurance data from another project, flagged by QAO | 2010-06-28 |
| VEDTA | EDTA added to Selenastrum capricornutum toxicity test, flagged by QAO | 2019-07-30 |
| VELB | Lab batch sample quantity exceedes number of samples allowed per batch, flagged by QAO | 2015-08-17 |
| VEUM | LCS/LCM recovery not within control limits, flagged by QAO | 2010-03-17 |
| VFCL | Field calibration not performed within 24 hours before use, flagged by QAO | 2022-02-02 |
| VFDP | Field duplicate RPD above QC limit;flagged by QAO | 2010-03-17 |
| VFIF | Instrument/Probe Failure, flagged by QAO | 2014-01-09 |
| VFIRL | Invalid RL, suspected laboratory transcription error, flagged by QAO | 2020-01-15 |
| VFNM | No documentation of the field measurement collection exists, flagged by QAO | 2016-07-21 |
| VFO | Estimated maximum possible concentration (EPMC), flagged by QAO | 2013-09-20 |
| VGB | Matrix spike recovery not within control limits, flagged by QAO | 2010-03-17 |
| VGBC | CRM recovery not within control limits, flagged by QAO | 2010-03-17 |
| VGIDA | Isotope Dilution Analogue recovery not within control limits, Flagged by QAO | 2023-06-27 |
| VGN | Surrogate recovery not within control limits, flagged by QAO | 2010-03-17 |
| VGR | Internal standard recovery is outside method recovery limit, flagged by QAO | 2025-05-02 |
| VH | Holding time violation occurred, flagged by QAO | 2010-03-17 |
| VH24 | Holding time was > 24 hours for Bacteria tests only, flagged by QAO | 2010-08-13 |
| VH8 | Holding time was > 8 hrs but < 24 hours for Bacteria tests only, flagged by QAO | 2013-01-17 |
| VHB | Result positively biased, flagged by QAO | 2013-09-03 |
| VHS | Spike analyte recovery is outside stated control limits, flagged by QAO | 2019-03-13 |
| VIE | Surrogate not added to this sample, flagged by QAO | 2014-06-06 |
| VIL | RPD exceeds control limit, flagged by QAO | 2010-03-17 |
| VILN | Rlog exceeds control limit, flagged by QAO | 2015-08-18 |
| VILO | Rlog not calculated because concentration below RL, flagged by QAO | 2015-08-18 |
| VIP | Analyte detected in field or lab generated blank, flagged by QAO | 2012-06-18 |
| VIP5 | Analyte detected in field or lab generated blank, >RL and >1/5 amount detected in associated environmental sample, flagged by QAO | 2012-06-21 |
| VIPF | Analyte detected in field blank, data validation code, flagged by QAO | 2010-03-18 |
| VIPMDL2 | Analyte detected in field or lab generated blank, >10% lowest detection in batch and >2.2x MDL, flagged by QAO | 2012-06-21 |
| VIPMDL3 | Analyte detected in field or lab generated blank, >MDL and >30% lowest detection in batch, flagged by QAO | 2012-06-21 |
| VIPND | Result not distinguishable from lab blank contamination, data validation code, flagged by QAO | 2020-03-18 |
| VIPRL | Analyte detected in field or lab generated blank, >RL, flagged by QAO | 2012-06-21 |
| VIS | Reporting limit elevated due to pres. of analyte in method blank, flagged by QAO | 2011-08-22 |
| VIU | Percent Recovery exceeds laboratory control limit, flagged by QAO | 2010-03-17 |
| VJ | Estimated value - EPA Flag, flagged by QAO | 2011-08-22 |
| VJA | Analyte positively identified but quantitation is an estimate, flagged by QAO | 2011-08-22 |
| VK | Peak detected, but did not meet quantification criteria, value represents estimated maximum concentration, flagged by QAO | 2024-11-07 |
| VLB | Result negatively biased, flagged by QAO | 2013-05-15 |
| VLMQO | Data did not meet laboratory MQO, but met project MQO, flagged by QAO | 2017-01-09 |
| VM | A matrix effect is present, flagged by QAO | 2011-08-22 |
| VMBM | Method (lab generated) blank missing from batch, flagged by QAO | 2023-10-04 |
| VMBP | Method (lab generated) blank did not go through entire preparation and analytical process, flagged by QAO | 2023-10-04 |
| VMN | Method procedures not followed, flagged by QAO | 1900-01-01 |
| VMOI | No associated % moisture results and therefore should not be compared to dry weight thresholds, flagged by QAO | 2023-03-29 |
| VNBC | Value not blank corrected, flagged by QAO | 2011-08-22 |
| VNC | Analyte concentration not certifiable in Certified Reference Material, flagged by QAO | 2010-03-17 |
| VNMDL | No Method Detection Limit reported from laboratory, flagged by QAO | 2012-04-18 |
| VNTR | Not Total Recovery: Method typically provides <50% recovery of analyte in native samples despite good recovery in spiked samples, flagged by QAO. | 2012-11-07 |
| VOL | Result may be biased high due to carry over from prior analysis, flagged by QAO | 2019-03-13 |
| VPJM | Result from re-extract/re-anal to confirm original result, flagged by QAO | 2012-05-31 |
| VPMQO | Data met laboratory MQO, but did not meet project MQO, flagged by QAO | 2016-09-14 |
| VQ | Questionable Result, flagged by QAO | 2021-12-16 |
| VQAX | When the native sample for the MS/MSD or DUP is not included in the batch reported, flagged by QAO | 2010-03-17 |
| VQCA | QA/QC protocols were not met for accuracy, flagged by QAO | 2012-06-04 |
| VQCP | QA/QC protocols were not met for precision, flagged by QAO | 2012-06-04 |
| VQN | No QA/QC performed or performed but not reported, used with historical data, Batch comment required | 2012-03-07 |
| VR | Data rejected - EPA Flag, flagged by QAO | 2009-04-29 |
| VRBS | Data rejected - Insufficient sample available to follow standard QC procedures, flagged by QAO | 2011-08-22 |
| VRBZ | Data rejected - Sample preserved improperly, flagged by QAO | 2011-08-22 |
| VRCI | The method detection limit is elevated due to chromatographic interference; MDL is reported as equal to RL, flagged by QAO | 2024-12-06 |
| VRDO | Data rejected - Co-elution, flagged by QAO | 2011-08-22 |
| VRE | Elevated reporting limits due to limited sample volume, flagged by QAO | 2011-06-08 |
| VREL | Reporting limits elevated due to change in lab capabilities, flagged by QAO | 2015-06-04 |
| VRGN | Data rejected - Surrogate recovery not within control limits, flagged by QAO | 2009-08-18 |
| VRIL | Data rejected - RPD exceeds control limit, flagged by QAO | 2011-09-14 |
| VRIP | Data rejected - Analyte detected in field or lab generated blank, flagged by QAO | 2012-06-18 |
| VRIU | Data rejected - Percent Recovery exceeds laboratory control limit, flagged by QAO | 2011-09-14 |
| VRJ | Data rejected - Estimated value - EPA Flag, flagged by QAO | 2011-08-22 |
| VRLB | Data rejected - Result negatively biased, flagged by QAO | 2013-12-18 |
| VRLST | Replicate lost or destroyed, flagged by QAO | 2016-08-01 |
| VRMDL | Data rejected - Spike concentration is less than MDL, flagged by QAO | 2024-08-16 |
| VRQ | Spike recovery not calculated due to high concentration of analyte, flagged by QAO | 1900-01-01 |
| VRVQ | Data rejected - Based on professional judgement QA/QC protocols were not met, flagged by QAO | 2011-08-22 |
| VS | Sample Receipt nonconformance, flagged by QAO | 2010-10-28 |
| VSC | Surrogate Corrected Value, flagged by QAO | 2011-05-26 |
| VSCR | Screening level analysis, flagged by QAO | 2010-03-17 |
| VSD3 | Result greater than three standard deviations from historical average, flagged by QAO | 2013-09-03 |
| VTAB | Test organisms do not meet the minimum age limit at test initiation, flagged by QAO | 2021-10-12 |
| VTAC | Alternative control used in toxicity statistical analysis, flagged by QAO | 2015-08-11 |
| VTAE | Test organisms exceed age limit at test initiation, flagged by QAO | 2018-02-15 |
| VTAM | Toxicity test organism age at test start is not recorded, flagged by QAO | 2021-07-22 |
| VTCF | Alternative control does not meet test acceptability criteria, flagged by QAO | 2018-02-02 |
| VTCI | Conductivity insufficient for test species, flagged by QAO | 2010-03-17 |
| VTCT | Conductivity tolerance exceeded for test species, flagged by QAO | 2010-03-17 |
| VTL | Minor deviation in temperature or light, flagged by QAO | 2020-12-07 |
| VTMO | Test organisms escaped or are otherwise missing, flagged by QAO | 2019-10-07 |
| VTNC | Too numerous to count, flagged by QAO | 2013-04-05 |
| VTOQ | 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, flagged by QAO | 2015-08-10 |
| VTR | Test conditions not acceptable (temp, light), flagged by QAO | 2015-08-13 |
| VTW | Water quality parameters outside recommended test method ranges, flagged by QAO | 2010-04-27 |
| VTWN | Required water quality parameters not measured, flagged by QAO | 2017-12-08 |
| VUJ | Reported quantitation limit is approximate and may not represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample, flagged by QAO | 2025-08-26 |
| VUKM | Lock mass interference present, flagged by QAO | 2024-09-25 |
| VVQ | Based on professional judgement QA/QC protocols were not met, flagged by QAO | 2011-08-22 |
| WE | Sample filtered immediately upon receipt by the laboratory. | 2017-12-15 |
| XI | Hydrocarbon response in motor oil range but does not resemble motor oil | 2019-05-29 |
