ICRP 66 Lung Deposition • Nordic nRF52 BLE • OSHA 2026 Wildfire Compliance

Occupational Wildfire PM2.5 Shift Dosimeter

Continuous personal particulate dose tracking for forestry, construction, and utility crews. Integrates minute ventilation exertion with ambient PM2.5 to provide legally auditable occupational health compliance.

quickstart.sh
$ git clone https://github.com/KELLERBABG/AeroDose.git
$ cd AeroDose && cargo test
$ cargo run --bin aerodose-audit --shift-log worker_042_shift.csv --reg-standard OSHA-2026

ICRP 66 Respiratory Dose Integration

Static air quality monitors only measure atmospheric concentration ($\mu ext{g/m}^3$). A worker carrying 30kg uphill breathes 4x more air than someone standing still. AeroDose computes actual deposited pulmonary dose:

Dose = ∫ C_PM2.5(t) × V_E(HeartRate(t)) × DF_alv(t) dt

Combining optical particle spectroscopy with IMU-derived exertion models prevents occupational acute pulmonary distress before permanent alveolar inflammation occurs.

Clip-on Industrial Hardware Stack

Engineered for extreme fieldwork in rugged environments, heavy dust, and remote forest terrain:

  • Sensirion SPS30: Laser-scattering particulate matter sensor with patented contamination-resistance and auto-fan cleaning.
  • Nordic nRF52840 SoC: Ultra-low power Bluetooth Low Energy (BLE 5.2) + NFC pairing to crew supervisor gateway.
  • Tamper-Proof Audit: Internal flash logs signed SHA-256 telemetry chains, preventing post-hoc shift falsification.

Occupational Health Standards vs Traditional Monitoring

ParameterMunicipal Weather StationStatic Job-Site MonitorAeroDose Clip-on Dosimeter
Spatial Resolution10 - 25 km radiusSingle fixed perimeter polePersonal Breathing Zone (0.3m)
Exertion ModelingNone (Assumes resting)NoneDynamic Minute Ventilation (V_E)
Liability LedgerUnusable in courtDisputed by microclimatesCryptographically Signed Shift Hash
Threshold AlertsDelayed 2-4 hoursSiren on boundary onlyHaptic / Acoustic Wearer Alert