An explanatory scattergram that explains the various features of the blank data represented. Mouse-over the various
items within the chart for the explanation.

A scattergram of blank data (blind blank and set blank) over a three year period On October 1 of each year, any required changes to LTMDLs are made. The actual quantitated result of the set blank, which, if less than the LTMDL, will be censored prior to release to the customer as "<LRL". The Long-term method detection level (LTMDL) in use at that time. A blind blank result that was reported as less-than LRL. Inorganic analyses generally will always report a value for a blank result. The red empty circle denotes a blind blank result that was determined to be an outlier and removed from the data set. The quantitated result of the blind blank value, uncensored. If the value is less than the LTMDL, the result would be changed to <LRL. A blind blank sample outlier based on the Grubb's test. This value is not used in the calculations. A set blank with no reportable detection of this analyte. Generally found in Organic analyses only. A set blank result that is greater than the y-axis maximum displayed. The end of the 2008 sample collection period, and the start of data collection for 2009. The end of the 2009 sample collection period, and the start of data collection for 2010. On October 1 of each year, any required changes to LTMDLs are made. The quantitated value of the blank samples, uncensored. Depending upon the calibration y-intercept, this will include negative values as well as positive ones. The date the sample was submitted to the laboratory, not the analysis date. If you want to look at the raw data, click the "Data" link to view the excel spreadsheet.