The loosely coupled BLE data collection frame- work enables new ways of architecting Inter- net of Things and Humans (IoTH) systems. An example application is to monitor the hand san- itization status of healthcare personnel (HCP) in an intensive care unit (ICU) to control and prevent the spread of hospital acquired infec- tions (HAIs), where unclean hands are the most common factor contributing to this cause. Clean- Hands [15] is a recently proposed system that uses a combination of BLE beacon tags and HCP’s mobile phones for detecting occurrences of noncompliance with hand hygiene. This appli- cation requires different levels of time accuracy. For instance, a few milliseconds may be sufficient to disambiguate the handwashing event of HCPs, but a significantly higher accuracy level of a few microseconds would be required to secure the same system against possible gaming