Entity and Attribute Overview:
A negative number (ex. -2) implies less than (ex. <2) reporting limit; the reporting limit is 2 times the detection limit. Some of the detection limits for a particular constituent varied with the method accuracy and analytical method. A zero (0) implies no sampling was performed for that parameter at that well.
Note: Attribute headings may be truncated in Shapefile format. Additionally, the attribute OBJECTID is changed to FID in the Shapefile format.
Data qualifier definitions:
< indicates that the compound was not detected above the reporting limit, which is the numerical value to the right of the < sign
E indicates that the value is estimated