PCB Ingestion Accumulation Model

Estimate PCB intake from incidental ingestion of building dust during a repeating work schedule.

Exposure inputs

PCB surface concentration (wipe sample)

µg/100 cm²

Alternative weighted surface concentration

Select one or more categories and assign weights totaling 100%.

38.4 - Office

10.41 - Classroom/Lab

3.21 - Common Areas

4.27 - Utility/Maintenance

Total weight: 100%Weighted average: 5.36 µg/100 cm²

Building dust load

mg/100 cm²

EPA ingestion rate

mg/day

Years exposed

years

Workdays per year

days/year

Hours per day

hours/day

Accumulated PCB mass1.68 mg

PCB concentration in dust: 0.134 µg/mg
Full-day ingestion dose: 4.018 µg/day
Daily dose (scheduled hours): 1.339 µg/workday
Total workdays: 1,250 days
Time factor (work hours ÷ 24): 0.3333
Total exposure hours: 10,000 hours
Accumulated mass: 1,674 µg
Surface concentration used: 5.36 µg/100 cm²

Accumulation of PCBs Through Ingestion Over Time

Screening estimate assumes the wipe concentration and dust load represent the same area, constant conditions during scheduled work hours, and 100% of ingested PCB mass is accumulated. It does not model absorption, metabolism, or elimination.

V.W. DeLuca, 2026