1. annually 2. It is not required to be completed in one day, but no more than three.

That is required for IH Survey, not required for this Avionics SE Depot to maintain facility. Site NOLA does monitor temperature, humidity, and ambient pressure in OBOGS clean room with stationary devices.

Below are some excerpts from one of the IH surveys conducted on our clean area. They will need to bring everything with them for measuring. The Clean Room is a single room, approximately 910 cubic feet in size. A work bench is positioned at one end of the room. There is a single supply vent and no return air vent. The ventilation has redundant HEPA filtration with HEPA and UV filtration in the main supply line and a second HEPA filter in the supply vent to the Clean Room. The components of ISO 14644-­2 were performed:  Particle Count Test  Air Pressure Difference  Airflow Particle Count Test Particle counting was performed using a TSI P-­Trak Particle Counter. Particle counting was performed in representative areas within the Clean Room. All measurements were less than the ISO Class 8 requirements for 0.5 micron, 1 micron and 5 micron particle size. The ventilation system was in normal operation during the testing. Air Pressure Difference An Extech Differential Pressure Manometer, HD755 was used to measure the pressure differential between the Clean Room and the support room immediately outside the clean room. The measurements indicated a pressure differential between these rooms as +0.05 inches of water. Airflow The supply airflow was measured using a TSI Accubalance Plus 8373. Supply air was measured during normal operations at 109 cubic feet per minute. Using the room size, the number of air changes per hour (ACH) was calculated at: 109 cfm x 60/910 ft3=7 ACH This value is within the ISO Class 8 requirements (5-­48 ACH). Temperature/Relative Humidity Temperature and Relative Humidity were measured during normal ventilation system operation using a SPER Scientific Instrument. The temperature measured during the survey was 70.1o F and Relative Humidity was 41%. Both were within the ISO644 parameters.