This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
FMIB Sphacroma pentodon working on surface of an untreated pile in thick scum of crude oil at Monticello SS Company's wharf at.jpeg check categories September Sphacroma pentodon working on surface of an untreated pile in thick scum of crude oil at Monticello Company's wharf at Vallejo California November Subject Piling Civil