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bcgov / water-quality-analysis

R scripts to calculate water quality trends and the water quality index at selected ambient monitoring stations in B.C.
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What do the EMS QA_INDEX_CODE values mean? #4

Closed joethorley closed 8 years ago

joethorley commented 8 years ago 
> unique(ems$QA_INDEX_CODE)
[1] "C" "D" "F" "B"
stephhazlitt commented 8 years ago

Good question. I will find out.

joethorley commented 8 years ago

QA Index of B

  1. If a result letter of > or < is reported then assign an index of B
  2. If confidence interval and method detection limit not provided then assign an index of B
  3. If result values are determined to be rounded, maximum index of B
  4. For all taxonomic results set maximum index of B

QA Index of C

  1. If Taxonomic Keys not recorded for sample, maximum index of C
  2. If a Lab Batch ID is not provided for result, maximum index of C

QA Index of D

  1. If a contract lab does not provide preservation and media codes, maximum index of D

QA Index of E

  1. If no analytical date for result where a max hold time has been defined, maximum index of E

QA Index of F

  1. Failed Confidence Interval Conversion (Text To Numeric), maximum index of F
  2. Failed Result Conversion (Text to Numeric), maximum index of F
  3. Failed pH check. Value out of range 0 to 14, maximum index of F
  4. Failed Result Unit Conversion to Standard Units, maximum index of F
  5. If the sample does not have an EMS ID assigned, maximum index of F
  6. Other validation rules where dissolved > total e.g. Validation Failed: CU-D > CU-T, maximum index of F