I popped in recently to check it out. Some photos to follow [click any to enlarge]:
This sign details that the largest of the "eleven potential mass graves" she discovered at T2 were 34 x 12 and 26 x 17 metres, although she states some are partially covered under the Soviet memorial and there may be more under it. Kues showed in his response to HC that GPR shouldn't be hampered by a bit of concrete [pp.1059-1062], so it's seems unclear why Sturdy Colls couldn't document disturbances under the memorial.
Topographic and geophysical surveys in the terrain of the extermination camp allowed eleven potential mass graves to be located. These non-invasive techniques respected Jewish Halachic Law by not disturbing the ground. The graves varied in size — the largest were 34m x 12m and 26m x 17x. However, some were bisected by the modern memorial so their overall dimensions could not be determined. It is likely that further graves exist under the monument since it was built to protect the areas believed to contain mass graves. The graves to be located in two distinct areas: some at the rear of the death camp area, and some nearer to the reception camp area, consistent with witness accounts concerning the different methods of body disposal.
Following is a comparison of two maps of T2 both created by Sturdy Colls that show her discoveries with GPR. The one on the left was created for the 2016 WL exhibition and the other for a early 2012 BBC article on her work.
The "probable burial/cremation pits"/"pits" are mostly the same, although the one in the former Lazerette appeared as two separate pits covering a larger area in the map published in 2012.