Combined PCB Accumulation Model

Estimate total PCB intake from inhalation and incidental ingestion during a repeating work schedule.

Exposure inputs

Inhalation

PCB air concentration

µg/m³

Inhalation rate

m³/day

Ingestion

PCB surface concentration (wipe sample)

µg/100 cm²

Building dust load

mg/100 cm²

EPA ingestion rate

mg/day

Duration

Years exposed

years

Workdays per year

days/year

Hours per day

hours/day

Combined accumulated PCB mass 2.30 mg

Inhalation: 1.05 mgIngestion: 1.25 mg

Full-day inhalation dose: 2.512 µg/day
Full-day ingestion dose: 3.000 µg/day
Scheduled inhalation dose: 0.837 µg/workday
Scheduled ingestion dose: 1.000 µg/workday
Combined scheduled daily dose: 1.837 µg/workday
PCB concentration in dust: 0.100 µg/mg
Total workdays: 1,250 days
Time factor (work hours ÷ 24): 0.3333
Total exposure hours: 10,000 hours
Combined accumulated mass: 2,297 µg

PCB Accumulation by Exposure Pathway Over Time

InhalationIngestionTotal

Screening estimate assumes constant exposure during scheduled work hours and counts 100% of inhaled and ingested PCB mass as accumulated. It does not model absorption, metabolism, or elimination.

V.W. DeLuca, 2026