ASPO Manager George Low advised Apollo program officials at KSC that, to collect adequate data for evaluating any potential toxicological hazard inside the spacecraft, collection of gas samples of the cabin atmosphere must be made for 12 hours during the unmanned altitude chamber test with all systems operating. Low asked that this requirement be included in the spacecraft test procedures.

(Purpose of a total CSM 101 and LM-3 toxicological evaluation was to verify that no toxic contaminants were given off by the nonmetallic materials used in the crew compartments.)