SEE: 2 Cars Pulled From Gowanus Canal Amid Federal Clean-Up

GOWANUS, BROOKLYN — Wagon wheels, porcelain coffee cans, a glass boat and, now — two sludge-filled cars.

Two cars covered in the notorious "black mayonnaise" were added this week to the list of strange items pulled from the polluted Gowanus Canal, whose toxic muck is being dredged by giant excavators as part of an ongoing federal clean-up.

The cars, first reported by Pardon Me For Asking, were taken out of the waterway just feet from one another over the last week, according to the blog.

Excavators "hooked" the first car, possibly a Mercedes, between near the Carroll Street Bridge last Friday and then, on Wednesday, pulled a second car a bit further south near Second Street.

"The Police was called by the contractor, but apparently the detective in charge did not know what to do about the discovery and needed to talk to his supervisor," blog runner Katia Kelly wrote.

Both cars were taken to an off-site facility to be cleaned, Kelly said.

The cars are among several odd discoveries excavators have made in the canal since starting work on cleaning out the 1.8-mile waterway several years ago. Those items include countless tires, a boat hull, bricks and other strange items, according to tours taken by Kellyand the Gowanus Canal Superfund Advisory Group.

The EPA began its official dredging of the canal, which it has designated as a hazardous Superfund site, earlier this month after a pilot project that scooped 17,000 cubic yards of toxic muck from the Fourth Street Basin.

The dredging of the main channel's sludge known as "black mayonnaise" will include "capping" the toxic sediment it can't take out with layers of concrete and uncontaminated soil.