D1 and D2	Indication of the absence, 1, or existence, 2, of a drainage system
G1 and G2	Indication of the absence, 1, or addition, 2 of a geotextile
GMC	Gravimetric Moisture Content
GSP	Going Stick Penetration
GSS	Going Stick Shear
ITD	Impact Test Device
ITI	Impact Test Index
M1 and M2	Indication of the two levels of moisture content tested.
RPS	Rotational Peak Shear
TDR	Time Domain Reflectometry
VMC	Volumetric Moisture Content