USGS Multimedia Gallery
Title: Collecting parking lot sealant samples
Description: USGS scientist Barbara Mahler uses a special vacuum (a model HVS3 High Volume Surface Sampler) to collect dust samples to be evaluated for contaminants.
Date Taken: Jul 22 2008
Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo.
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