Table 3.
Sensitivity of predicted steady-state exposure to selected model parameters.
| Variable | Baseline value | Exposure pathway |
|||
|---|---|---|---|---|---|
| Inhalation | Dermal | Oral | Total | ||
| DEHP concentration in VF (C0, μg/m3) | 2.55 × 1011 | 1.00 | 1.00 | 1.00 | 1.00 |
| Partition coefficient (Kvinyl/air) | 2.3 × 1011 | −0.50 | −0.50 | −0.50 | −0.50 |
| Mass-transfer coefficient for flat surfaces (hm, cm/sec) | 0.1 | 0.82 | 0.82 | 0.79 | 0.79 |
| TSP concentration (μg/m3) | 20 | 0.07 | −0.42 | −0.41 | −0.41 |
| Partition coefficient (Kparticle/air, m3/μg) | 0.25 | 0.07 | −0.42 | −0.41 | −0.41 |
| Partition coefficient (Kdust/air, m3/g) | 21,100 | 0.00 | 0.00 | 1.00 | 0.97 |
| Inhalation rate (IR, m3/day) | 6.8 | 1.00 | 0.00 | 0.00 | 0.01 |
| Exposure duration in main house (ED3, hr/day) | 16.5 | 0.88 | 0.88 | — | — |
| Skin surface area (SA, m2) | 0.59 | 0.00 | 1.00 | 0.00 | 0.02 |
| Overall skin permeability coefficient (P, cm/hr) | 580 | 0.00 | 1.00 | 0.00 | 0.02 |
| Daily intake rate of dust (DIR, mg/kg/day) | 10.3 | 0.00 | 0.00 | 1.00 | 0.97 |
| Body weight (kg) | 11 | −0.50 | −0.50 | — | — |
| Air exchange rate for three compartments (1/hr) | 0.5 | −0.46 | −0.46 | −0.46 | −0.46 |
| VF area in kitchen (A1vinyl, m2) | 14.4 | 0.18 | 0.18 | ~0.22 | ~0.22 |
| VF area in bathroom (A2vinyl, m2) | 6.2 | 0.13 | 0.13 | ~0.25 | ~0.25 |
| VF area in main house (A3vinyl, m2) | 19.2 | 0.52 | 0.52 | ~0.34 | ~0.35 |
Sensitivity to all model parameters is provided in the Supplemental Material (doi:10.1289/ehp.0900559.S1).