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Fig. 1 | Microbiome

Fig. 1

From: Clean room microbiome complexity impacts planetary protection bioburden

Fig. 1

Schematic of the dates and locations sampled in the Spacecraft Assembly Facility. A total of 98 samples were collected over a 6-month period from the SAF. The graph is compartmentalized into artificial section based on sample grouping and foot traffic. Each section describes the location number and number of samples collected throughout the study in a gray box. In total, there are 11 sampling dates and 13 sampling locations. The sample collection was carried out between March 2016 and August 2016, and 98 floor samples were collected during 11 sampling time periods in the JPL SAF. Total surface area of the SAF cleanroom is 921.1 m2 with controlled conditions such as temperature (20 ± 4°C), humidity (30 ± 5%), stringent gowning requirements, and weekly cleaning [28]. Although SAF is capable of becoming an ISO-7 (10k) cleanroom, at the time of sampling SAF was certified as an ISO-8 (100k) cleanroom. A maximum measurement of 8287, 0.5 μm particles/ft3 and 159, 5.0 μm particles/ft3 were seen during the 6 months of the study. High traffic area: L1, L6, and L10; low traffic area: L5, L9, and L13. The rest of the locations had moderate traffic due to hardware assembly

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