core drilling 3 inch hole in concrete block wall

this is how we core drill a 3 inch hole in a block wall for new plumbing in a parking garage in Raleigh, NC. The 3 inch hole was cored at 8 foot off the ground in a partially concrete poured wall that was hollow block cells where we had to anchor the core drilling rig. Most of the time the core drilling goes fairly well as we have did this many times before. The price was $350 dollars for this job.