Student or Learner
Peter did not perform the inspection last Saturday due to he went to the incorrect location. Now, they only can redo the inspection by tomorrow night as all their schedule is fully booked. We will deliver the goods on 30 June if the inspection result is passed.
I agree with Rover_KE's version, except 'if they are passed by the inspection'. What they pass is the inspection. What they are passed by is the inspector. I'd just say 'if they pass [the] inspection' - with or without the 'the' (which puts the focus more strongly on the event).
Fair comment, Bob.