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Explain how the dust concentrations will be modeled. What model will be used? <br /> What are the data needs of the model? <br /> The exposure duration (ED) should be 25 years not one year. <br /> 39. Page 4-12, Section 4.8.1.1.8 <br /> Calculate summary intake factors for this pathway. <br /> Explain how the volatile organic compounds concentrations in dust will be modeled. <br /> What model will be used? What are the data needs of the model? <br /> The ED should be 25 years not one year. <br /> 40. Page 4-12, Section 4.8.1.2.1 <br /> Explain and list what exposure parameters will be used for children. <br /> 41. Page 4-12, Section 4.8.1.2.1 <br /> Calculate the summary intake factor for this pathway. <br /> 42. Page 4-12, Section 4.8.1.2.2 <br /> Calculate summary intake factors for this pathway. <br /> Explain how the contaminant concentration in food will be modeled. What model <br /> will be used? What are the data peeds of the model? <br /> 43. Page 4-14, Section 4.8.1.2.3 <br /> Calculate summary intake factors for this pathway. <br /> Explain how the contaminant concentration in shower vapors will be modeled. What <br /> model will be used? What are the data needs of the model? <br /> 44. Page 4-14, Section 4.8.1.2.4 <br /> The skin surface area (SA) parameter should be 23,000 cm2. Additionally, an <br /> exposure time (ET) of .25 hours/day should be included as a parameter for this <br /> pathway. <br /> Calculate summary intake factors for this pathway. <br /> Explain how the absorbed dose per unit area per shower will be calculated. <br /> USEPA/R9 12 Apr 93 9/19 <br /> I <br />