This looks like a typical disc defect that you are bound to have once in a while, even with the best manufacturers. I just went through a spindle of Fujifilm TYG02s that had 3 discs like this in the lower third.
Your drive is fine. I've had an occasional DVD with spots like these with every drive I owned, and with many brands of discs, except the spots were rarely that large, so PIF error levels weren't as high as in your scan, and the hills in the lower PIF chart weren't as wide.
If you consistently see similar defects on every disc from that spindle, try burning the next disc on a different drive to confirm this, and consider returning them to the store for replacement.