Which agency would be primarily concerned with PECQs related to pesticides?

The Environmental Protection Agency (EPA) is primarily concerned with Probable Effect Concentration Quotients (PECQs) related to pesticides because it is the federal agency responsible for regulating the use and safety of pesticides in the United States. The EPA evaluates the potential environmental and health effects of pesticides, including their concentration in various ecosystems and their impact on wildlife and human health.

PECQs are used to assess the risks of chemical exposure, particularly in the context of environmental pollutants like pesticides. The EPA employs these measures to determine safe levels of pesticide use, conduct risk assessments, and establish regulatory standards, ensuring that pesticide usage does not negatively affect ecosystems or public health.

Other agencies, such as the Food and Drug Administration (FDA), focus on food safety and drug approvals, while the Occupational Safety and Health Administration (OSHA) is primarily concerned with workplace safety and health. The National Oceanic and Atmospheric Administration (NOAA) deals with atmospheric and oceanic conditions and helps manage marine resources, but it does not directly regulate pesticide use. Thus, the EPA's focus on environmental protection and pesticide regulation makes it the primary agency regarding PECQs related to pesticides.