Appendix D Food Codes for NHANES - OEHHA

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SRPcientific Review Panel Draft Version 2 FebruaryJune, 2012 Table E3 Specific Pathways to be Analyzed for Multipathway Chemicals Chemical Soil Ingestion. Dermal Meat, Milk & Egg Ingest E-14 Fish Ingestion Exposed Veg. Ingest. Leafy Veg. Ingest. Protected. Veg. Ingest. Root Veg. Ingest. 4,4’-methylene dianiline X X X X X X Creosotes X X X X X X X Diethylhexylphthalate X X X X X X X Hexachlorocyclohexanes X X X X X X X Hexachlorobenzene X X X X X X X PAHs X X X X X X X X PCBs X X X X X X X X Dioxins & furans X X X X X X X X Cadmium & compounds X X X X X X X X X Chromium VI & compounds X X X X X X X X X Inorganic arsenic & X X X X X X X X X cmpds Beryllium & compounds X X X X X X X X X Lead & compounds X X X X X X X X X X Inorganic mercury cmpds X X X X X X X X X Nickel & compounds X X X X X X X X X Fluoride & compounds X X X X X X X X X Selenium and compounds X X X X X X X X X Water Ingest Breast Milk Ingestion.
SRPcientific Review Panel Draft Version 2 FebruaryJune, 2012 OEHHA is recommending that all of the chemicals chosen for multipathway analysis be included in the soil ingestion and dermal pathways. The soil t1/2 values needed to determine concentration in the soil are found in Appendix G. The variates need for the dermal pathway are found in Chapter 6 and Appendix F. The meat (beef, chicken, pork), cow’s milk and egg pathways are listed in one column because the lipid solubility and half life in the body are common factors which determine if these compounds will be present in these three pathways in appreciable concentrations in the fat of meat, milk and eggs. E.3 Evidence for Inclusion of Hexachlorobenzene for Multipathway Assessment In the previous Hot Spots Guidance document, semi-volatile substances with less than 0.5% of their total mass in the particle-associated fraction was not considered for multipathway analysis. Although this is a reasonable cut-off for semi-volatile substances predominantly in the gas phase, an exception is made for hexachlorobenzene (HCB). From Table E1, the Junge model shows HCB with a particle/gas ratio of only 0.0296% at 25 o C. Normally, this would exclude HCB from multipathway analysis. However, actual field measurements of the air/particle partitioning of HCB in Table E.4 shows that the compound is often found in particle form above 0.5%. The greater than expected particle fraction for HCB is a likely result of environmental conditions at the locations assessed for HCB. The adsorption of HCB on aerosols and subsequent deposition depends on the vapor pressure, the amount and surface area of aerosol particles, and the relevant environmental temperature (Ballschmiter and Wittlinger, 1991). Colder temperatures and greater airborne particulate levels would increase the particle/gas ratio of HCB. In fact, Ballschmiter and Wittlinger (1991) suggested that the particle fraction found at -8 o C (3.5%) in a rural region will be similar to the particle fraction in urban areas with higher particulate levels and an air temperature of 15 o C. E-15
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Appendix D Food Codes for NHANES - OEHHA

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