In the morning, completed another 40x40m quadrant of the mag survey (0,40 to 80,40; aka stake pts 4-17). This is the portion of the survey that run adjacent to the south edge of the SLT operations, where I was really hoping to find evidence for subsurface architecture continuing from the excavated areas. We also completed a 40x60m portion of the grid in the afternoon (0,40 to 60, 80; aka stake pts 13-28).After downloading the data and displaying in Surfer it quickly became apparent that there was weirdness in the data, as the first 10m and last 10m of each data block was showing up as vertical lines like a test pattern. I called Mike Wilson at GEM and after looking at the data I emailed him, he said that it was a software issue and he will email me an upgrade soon.