The nnn97QWPHY files have the following parmameters:

00010 Water Temperature (Degrees C)
00400 pH (Standard Units)
00095 Specific Conductance (uS/cm)
00300 Oxygen Dissolved (mg/L)
00009 Cross Section (Feet)
00003 Sampling depth (Feet)

These physical water quality samples were collected with a HYDROLAB multi-parameter sensor.