Description:

This is the date of a well maintenance activity (Well Maintenance Information), the date the logging of a borehole or a pit is performed (lithologic description information), the date a test is performed (calculated hydrologic parameter information), the date a measurement is taken (groundwater level or Environmental Measurement data) or the date a sample is collected, field test performed or a field quality control sample generated (environmental sampling information, sample/test/result information). Note that LOGDATES must be consistent between Normal samples (N) and any associated derived QC samples (e.g., (FD, FR, SD, LR or RD).

ATI:  The starting date that a sample is collected, a field test is performed, or a quality control sample is created.

CALC:  The starting date of the aquifer test that is being taken.

EMI:  The date that the sample was taken.

GWD:  The starting date that a sample is collected, a field test is performed, or a quality control sample is created.

LTD:  The starting date that a sample is collected, a field test is performed, or a quality control sample is created.

OWL:  The starting date that a sample is collected, a field test is performed, or a quality control sample is created.

PUMPRATE:  The starting date that a sample is collected, a field test is performed, or a quality control sample is created.

RESULT: The date that the sample was taken.

SAMPLE: The date that the sample was taken.

TEST: The date that the sample was taken.

TWI: The starting date that a sample is collected, a field test is performed, or a quality control sample is created.

WMI: The starting date that a sample is collected, a field test is performed, or a quality control sample is created.