"I never observed any prescription drugs other than medical oxygen being given to sickened Mauna Kea workers during my time on the very high altitude summit of Mauna Kea."

"40% less oxygen and high radiation levels can do strange things to sea level adapted humans."

"Astronomy staff that routinely discharged industrial gas into the indoor environment at high altitudes did not wear oxygen deficiency monitors or protective breathing respirators."

"When discharging industrial gas into the indoor environment in high altitude astronomy, we never wore breathing respirators that fed us oxygenated air at above the legally required 19.5% oxygen levels."

"During my time in high altitude astronomy, I routinely witnessed workers breathing medical oxygen, industrial carbon dioxide, nitrogen and helium gas as part of their daily work routine."

"A healthy person that uses medical oxygen to perform their job on a daily basis should expect to eventually become a sick person."

"I never met anyone in high altitude astronomy that had a prescription for daily medical oxygen use."

"Oxygen deprivation and supplemental oxygen are both bio-hazards for Mauna Kea workers"

"After several extreme very high altitude night shifts, returning to sea level and exposure to increased oxygen and bright sunlight would bring on intestinal pains and diarrhea after eating the first large meal."

"There are numerous types of oxygen available for purchase. These are industrial oxygen – generally for welding and not suitable for human consumption, aviation oxygen – regulated by the FAA rules, medical oxygen - regulated by the FDA and DOT. It was unclear what type of oxygen was inside the oxygen cylinders that employees were using at the summit of Mauna Kea and most employees assumed it was medical oxygen for treating their medical conditions."