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The response addresses concentrations of PCBs in the environment.

Prior description and specific human/animal activities related to concentration are cited and referenced.

Prior description and the response is data supported.

Prior description and data support is drawn from multiple sources.

Prior description, air, water, and soil are addressed, and the response is supported with specific references.

Prior description, both ground and surface water are addressed as well as information on solubility and volatility.

Prior description and the relative importance of environmental interactions are noted.

The response addresses whether environmental conditions affect the bioavailability of PCBs.

Prior description and the response is supported with specific references.

Prior description and each condition is listed and discussed.

Prior description and the response is accurate.

The response addresses the persistence of PCBs within the environment.

Prior description and the response is supported with specific references.

Prior description and the factors affecting persistence are discussed.

Prior description and the response is accurate.

Movement of PCBs within the Environment

The response addresses the movement of PCBs within the environment.

Prior description and the responses are supported with specific references.

Prior description and the different types of movement and their relative importance is discussed.

Prior description and the response is accurate.