HEDS

This page provides a description and a link to a "HEDS" database that provides information needed when modeling exposure levels or performing exposure assessment.

Short description

NHEXAS Phase I consists of three demonstration/scoping studies using probability-based sampling designs. Volunteer participants were randomly selected from several areas of the U.S. These studies included personal exposure, residential concentration, and biomarker measurements. The Arizona study was conducted in Arizona, and measured metals, pesticides, and VOCs. The Maryland study was conducted in Maryland, and measured metals, pesticides, and PAHs. The Region 5 study was conducted in EPA's Region 5 (Ohio, Michigan, Illinois, Indiana, Wisconsin, and Minnesota), and measured metals and VOCs. Researchers worked with the participants to measure the level of chemicals in the air they breathed; in foods and beverages they consumed, including drinking water; in the soil and dust around their homes; and in their blood and urine. Participants completed questionnaires to help identify possible sources of chemical exposure. Sample collection occurred between 1995 and 1997.

Link

http://www.epa.gov/heds/

Key words

NHEXAS, Indoor air, personal air, outdoor air, VOCs, volatile, organic compounds, benzene, 1,3-butadiene, formaldehyde, toluene, trichloroethene, metals, lead, cadmium, chromium, arsenic, particles, PM10, total inspirable air, PAHs, anthracene, benzo(a)pyrene, chrysene, phenanthrene, pesticides, a-chlordane, g-chlordane, chlorpyrifos, 4,4'-DDD, 4,4'-DDE, 4,4'-DDT, dieldrin, heptachlor, malathion, water, drinking water, tap water, bottled water, bathing, showering, nickel, barium, manganese, selenium, vanadium, copper, zinc, VOCs, volatile organic compounds, benzene, 1,3-butadiene, formaldehyde, toluene, trichloroethene pesticides, a-chlordane, g-chlordane, carbaryl, chlorpyrifos, diazinon, dieldrin, heptachlor, malathion, soil, dust, metals, lead, arsenic, cadmium, nickel, chromium, barium, manganese, selenium, vanadium, copper, zinc, PAHs, anthracene, benzo(a)pyrene, chrysene, phenanthrene, pesticides, a-chlordane, g-chlordane, chlorpyrifos, diazinon, dieldrin, heptachlor, malathion, food, pesticides, chlorpyrifos, diazinon, metals in dermal wipes, PAHs in dermal wipes, metals in urine, lead, arsenic, cadmium, nickel, chromium, barium, manganese, selenium, vanadium, copper, zinc, pesticide metabolites in urin, 1-naphthol, 3,5,6-trichloro-2-pyridinol, malathion dicarboxylic acid, atrazine mercapturate, metals in blood, pesticides in blood, chlorpyrifos, diazinon, malathionlipids, VOCs in blood, 1,3-butadiene, formaldehyde, toluene, and trichloroethene, biomarker