The young man meant well.. but forget an 8" diameter spill of pvc cement on the floor. I observed most of the install, and after the spill he elected to "let dry" before cleaning.
I could not figure out why the smell was so strong. Finally it hit me, and I shutdown the AC and tried to pull most of it up. Then I really got worried when I validated my concerns about its flamability. I turned off the gas to my nearby (same enclosed room, less than 8 feet away) water heater.
I think the let dry approach was a bad idea. The vapors filled our house, and even after prying most of it up, some remain and presumably will be letting off vapors for a day or two.
Should I call the contractor and let them know? Seems to me the vapor and nearby water heater could have been a disaster. My wife and 3 young kids were inside most of this eve and night.