To evaluate whether VOCs are migrating out of the landfills into the vadose zone, a soil vapor survey of the soil beneath the landfill bases was performed. Permanent vapor monitoring probes were installed and then sampled twice for VOCs. Groundwater beneath the landfills has been impactd by VOCs, namely TCE, DCE, and toluene.

This Additional Site Characterization Work Plan presents a strategy for collecting site characterization information at the closed Maricopa County Cave Creek Landfill to support ongoing remedial action planning for trichloroethene-impacted groundwater underlying the site. The Work Plan supplements previous remedial investigation work plans prepared to characterize the nature and extent of site contamination.

Argues that the canons of evidence that apply to artifactual evidence of prehistoric behavior patterns are sometimes distinct from those that apply to non-artifactual evidence, and the logic and archaeological value of the latter is not less simply because it is different. The essay is intended to instruct and sensitise archaeologists to this issue as much as it is to allay concern that the pollen evidence for Archaic maize cultivation at the Koster site may not be credible. 49 p. Also see Schoenwetter 1994