Oral RfD value in Table 3-4: 0.2 mg/(kg-day)

Calculate the acceptable groundwater concentration for the chemical Xylenes (data are inadequate for an assessment of human carcinogenic potential). Commercial development is placed above a groundwater aquifer contaminated with Xylenes, and commercial establishments will use the groundwater as a source of drinking water. Assume you determine risk for an average adult who weighs 78 kg and consumes 2.3 L water per day. Use the RfD value in Table 3-4 in the textbook. Assume also that commercial establishments have an exposure frequency of 245 days/yr, and an exposure duration of 30 yr. Calculate the acceptable groundwater concentration for the chemical Xylenes (data are inadequate for an assessment of human carcinogenic potential). Commercial development is placed above a groundwater aquifer contaminated with Xylenes, and commercial establishments will use the groundwater as a source of drinking water. Assume you determine risk for an average adult who weighs 78 kg and consumes 2.3 L water per day. Use the RfD value in Table 3-4 in the textbook. Assume also that commercial establishments have an exposure frequency of 245 days/yr, and an exposure duration of 30 yr