RE: The Acid Caused the Surface Leakthey acid stimulation is done under extreme pressure ,almost at max pressure for the casing,they havent said what they pumped at but it is possible under a tight squeeze they had to bump up there pressure to get there acid away andi have seen the surface casing collaspe before,something happened to the surface casing cause it would have been pressure tested after the cement job,hope this isnt the problem