Calibration Basics
This probe must be calibrated before pH.
What is the conductivity probe.
CCVs must be performed within this time window before field deployment unless CAL/ICV were completed within the same window.
What is 1 day?
These types of punctuation are acceptable in WQCS.
What are . ; /
This is the amount of analyte-free water that must be rinsed through Whatman polydisc filters and Geotech High-Capacity Disposable filters before sampling.
What is 300 mL of analyte-free water?
For established stations, this is the required amount of containers to be checked per site.
What is one container.
This verification must be performed immediately after a CAL, using fresh standard solution.
What is an Initial Calibration Verification (ICV)?
This is the range within which the specific conductivity probe must read from the standard.
What is ±5%?
This is the method for getting a station back into WQCS that was deleted.
What is contacting DQAS to delete the old event with the missing station and create a new event. Individual stations cannot be readded.
This is the amount of time that pre-rinsed filters may be stored for before use and where they may be stored.
What is 3-days and in the fridge?
This is the frequency of expiration of the NIST thermometer and where that information can be found.
What is once a year, and the expiration is on the NIST and in WQCS?
If a field conductivity reading falls below 100 μmhos/cm, you must do this
Perform two CCVs with 100 and 1413 (or appropriate standard)
This is the frequency at which the sonde temperature must be verified against a NIST-traceable thermometer at 3 different temperatures.
What is 90-days/quarterly?
What is an O-code?
This sample bottle is always preserved before the metals sample to reduce cross-contamination and uses this acid for preservation.
What is the nutrients bottle and the sulfuric acid?
Where samples should be collected from when sampling at a bridge or dock.
What is the upstream side?
Field measurements must be preceded by an acceptable ICV or CCV and must be followed by an acceptable CCV within these many hours.
What are 26 hours?
This is your explanation of how vertical and horizontal sonde position affects depth reading
If the sonde is vertical, the depth sensor is 0.272 m above the water quality sensors, so an off-set reading is needed if the meter is held vertically. If the sonde is horizontal, not off-set reading is needed.
What are the "chilled in 15", "acid in 15", and "filtered in 15" boxes.
This is when a blank is required.
What is one blank per field team per day when sampling more than one site?
These are the hydrological conditions under which you should not sample.
What are if water is in an isolated pool or section of water which is not representative of water quality conditions in the greater area and consistent with objectives of the sampling effort.
This is the range in which the sonde must read temperature from a NIST-traceable thermometer.
What is ± 0.5°C?
This is what is done when the instrument fails to meet CAL or ICV acceptance criteria.
The instrument is immediately recalibrated or noted in maintenance record and removed from service.
These two items in WQCS should be verified against the standard boxes in the lab before entering CAL/ICV/CCV.
What are the standard ID and the expiration date.
This is the distance within which samples must be collected of a correct station location.
What is 50m?
This is the defined minimum water depth for proper sample collection.