T & M Engineering personnel regularly inspect spacecraft, the Space Shuttle Payload Bay and conduct pre-flight wipe analysis and review potential contamination conflicts between payloads and make recommendations as a service to NASA. In addition to providing recommendations on procedures to reduce contamination, T&M Engineering also provides fall out monitors to measure particle fall out and molecular deposition during pre-flight operations including payload integration and shipping. Any number and combination of active or passive detectors can be placed at various locations on and/or around the payload during integration, and inside shipping containers. The passive detectors can then be analysed. Particle fallout and molecular fall is determined (including molecular species) and results are reported giving an indication of the cleanliness as determined by MIL-STD 1246C. Such monitors have recently been used supporting the SAGE III instrument transportation to Russia.