Class Exercise # 5 - SolutionRisk Characterization: Non-Carcinogens

HQ = Intake / Toxicity

Intake Rate = mg/kg-day

Toxicity = Oral or Inhalation RfD (mg/kg-day)

1. Adult Ingestion of Water, Toluene

HQ = (1.37 x 10-2 mg/kg-day) / (0.2 mg/kg-day)

= 0.07

2. Child Ingestion of Soil, Toluene

HQ = (1.3 x 10-4 mg/kg-day) / (0.2 mg/kg-day)

= 0.00065

3. Adult Inhalation of Vapor, Toluene

HQ = (0.27 mg/kg-day ) / (0.114 mg/kg-day)

= 2.4

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