Please report the 3-letter lab remark codes from this list as appropriate for each sample.
| CODE | NAME | DEFINITION |
| ALC | aldol condensation | The indicated compound is suspected by the analyst of being a product of an aldol condensation reaction. |
| ALT | alternate measurement | The subject parameter was determined using an alternate measurement method. Value is believed to be accurate but could be suspect. |
| BDL | below detectable limits | There was not sufficient concentration of the parameter in the sample to exceed the lower method detection limit in force at the time the analysis was performed. Numeric results field, if present, is an approximate value. Also see MDL. |
| BLQ | between instrument detection limit and limit of quantification | Result was above instrument detection limit but below limit of quantification. |
| CAN | canceled | The analysis of this parameter was canceled and not performed. |
| CBC | cannot be calculated | The calculated analysis result cannot be calculated because an operand value is qualified. |
| CLC | calculated result | Calculated result |
| CNT | non-acceptable colony counts | Results based on colony counts outside acceptable range. |
| CON | confirmed | The subject parameter has been confirmed using an auxiliary analytical technique as specified in the analytical method. |
| EER | entry error | The recorded value is known to be incorrect but the correct value cannot be determined to enter a correction. |
| EHT | exceeded holding time | Sample or extract was held longer than stated time before analysis; results may be estimated. |
| EST | estimated value | Present above detection limit but not quantified within expected limits of precision. |
| FBK | found in blank | The subject parameter had a measurable value above the established QC limit when a blank was analyzed using the same equipment and analytical method. Therefore, the reported value may be erroneous. |
| FBS | failed blank sample | The blank sample did not meet the established measurement quality criterion. Blank concentration > MDL. |
| FDB | failed dry blank | Laboratory procedural or dry blank failed acceptance criteria |
| FDC | failed drift check | The drift check sample did not meet the established measurement quality criterion. |
| FDL | failed lab duplicate | Lab duplicate sample failed to meet the established measurement quality criterion. |
| FFD | failed field duplicate | Field duplicate exceeded stated relative percent difference. |
| FFR | failed field blank | Field blank failed acceptance criteria |
| FFS | failed field spike | Field spike recoveries failed acceptance criteria |
| FFT | failed trip blank | Trip blank failed acceptance criteria |
| FIS | failed internal standard | Internal standard failed acceptance criteria |
| FLC | failed linearity check | The linearity check sample did not meet the established measurement quality criterion. |
| FLS | failed laboratory spike | Laboratory spike recoveries failed acceptance criteria |
| FMS | failed matrix spike criteria | Recovery of matrix spike was outside of stated limits |
| FPC | failed performance | Laboratory performance check failed acceptance criteria |
| FPS | field preliminary screening | A preliminary screening of the sample for the subject parameter was conducted. The result of the screening indicated that it would not be useful to determine the concentration of the parameter. |
| FQC | failed quality control | The analysis result is not reliable because quality control criteria were exceeded when the analysis was conducted. Numeric field, if present, is estimated value. |
| FRS | failed reference | Internal laboratory reference sample failed acceptance criteria. |
| FSF | failed surrogate spike | Surrogate spike recoveries for ICP MS of Y, Ho, or Yb failed acceptance criteria |
| FSL | failed blank | Spiked laboratory blank or larboratory procedural blank failed acceptance criteria |
| FSR | failed SRM | Standard Reference Materials failed acceptance criteria. |
| FSS | failed surrogate | Surrogate recovery failed acceptance criteria |
| GTL | greater than upper detection limit | Actual value is known to be greater than value of the upper detection limit |
| INT | interference suspected | Analyst believes this result to be an interference and not the analyte listed. |
| ISP | improper sample preservation | Due to improper preservation of the sample, it was rendered not suitable for analysis. |
| LAC | laboratory accident | There was an accident in the laboratory that either destroyed the sample or rendered it not suitable for analysis. |
| LIS | laboratory internal standard | For organic analysis, internal standards added to a sample to be used for quantitation. |
| LLS | less than lower standard | The analysis value is less than the lower quality control standard. |
| LTC | less than criteria of detection | Value reported is less than the criteria of detection (which may differ from instrument detection limits). |
| LTL | less than lower detection limit | Actual value is known to be less than value given for the lower detection limit |
| MDL | below Ultra MDL | Value was below the Ultra method detection limit. |
| MSL | "EMSL" detection limits | Instrument detection limits were computed using a "T" test on two or more calibration samples. |
| NAI | not analyzed due to interference | Because of uncontrollable interference the analysis for the subject parameter was not conducted. |
| NAP | Not Applicable | Not applicable (not to be used in any field except Laboratory remark codes) |
| NAR | no analysis result | There is no analysis result required for this subject parameter. |
| NSQ | not sufficient quantity | There was not sufficient quantity of the sample to conduct an analysis to determine the concentration of the subject parameter. |
| PNQ | present but not quantified | The subject parameter was present in the sample but no quantifiable result could be determined. |
| PRE | presumptive presence | Presumptive evidence of presence of material; tentative identification. |
| PTS | peak too small | Peak is too small to apply relative percent difference criteria for duplicates |
| REJ | rejected | The analysis results have been rejected for an unspecified reason by the laboratory. For any results where a mean is being determined, this data was not utilized in the calculation of the mean. |
| REQ | reque for re-analysis | The analysis is not approved and must be re-analyzed using a different method. |
| RET | return(ed) for re-analysis | The analysis result is not approved by laboratory management and reanalysis is required by the bench analyst with no change in the method. |
| REX | re-prepared | The indicated analysis results were generated from a re-preparation (extraction) of the same sample. |
| RIN | re-analyzed | The indicated analysis results were generated form a re-analysis (injection) of the same sample extract or aliquot. |
| SFF | failed field spike blank | Field spike blank (SFB) recoveries are either below 70% or above 125% |
| TDS | RPD Criteria Exceeded | Duplicate values less than 5 times the method detection limit and RPD criteria exceeded. (Too darn small) See FDL also. |
| TIE | tentatively identified-estimated value | The subject parameter was not in the contract-defined list of parameters to be analyzed for; however the value has been estimated. |
| UND | analyte not detected | Analysis was performed but analyte not detected above noise. |
