The drinking water standard for dioxin is 3 x 10-8 mg/L. Using EPA exposure factors for residential consumption, what lifetime risk would this pose? What concentration would correspond to a risk of 10-6? The following data and assumptions apply: Data or Assumption Value Cancer Slope Factor = 1.56 x 10^5 (mg/kg x day)^-1 Average Body Weight = 70 Kg Average Lifespan = 70 Years Average Daily Water Intake = 2 L/day Average Time in One House = 30 Years Absorption Factor = 1.0.