And in between the brick walls, Davis remembers something else: A PVC pipe that ran from the bunker to the front of Dykes' property.
Late in the evening, the man had the child in some sort of underground bunker or storm shelter, and SWAT team members were communicating with him through a PVC pipe, CNN affiliate WSFA reported.
Phthalates, the chemicals that make a PVC container flexible, "can migrate out of the plastic when it's heated, " says Dr. Halden, who has done comprehensive studies on emerging contaminants and plastics for more than a decade.
For the 12, 000-seat basketball arena, architects at Wilkinson Eyre devised a rapidly erected steel-frame system shrink-wrapped with a white PVC skin, the curved steel stretchers forming a pattern of alternating diagonal projections on the outside.
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The lobby was decorated with traffic cones, a pile of PVC piping and a garbage bin holding an assortment of canes and crutches.
Chlorine is a big component of PVC plastic, so the housing bust has cut demand a bit.
Investigators have communicated with the suspect through a length of PVC pipe that extends out of the bunker.
It thrashes and flops on the wet deck as members of the Miami team jump on its back and Hammerschlag slides a long, PVC tube into its gnashing jaws.
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Chlorine's largest use is as an ingredient in polyvinyl chloride, PVC being almost as popular a plastic as polyethylene.
The frame is no longer assembled from laser-etched wood, instead there's a powder-coated steel frame with PVC plastic sides to help shield the various moving parts and lend an air of professionalism to the affair.
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This somewhat dangerous device had a six foot barrel, was made out of PVC irrigation pipe of varying diameters, and was powered by compressed air.
New York-based designer and manufacturer Sandy Chilewich reinvented the art of the table when she came across woven vinyl, a kind of extruded yarn that could be encased in PVC.
The suspect, who police have identified as Dykes, is holed up in a bunker 4 feet underground and built at least partially out of PVC pipe, authorities have said.
At Gadget Camp, sponsored in part by a foundation affiliated with the Fabricators and Manufacturers Association, girls learned how to make a lamp, a candy dispenser, and other useful items out of various materials including wood, metal, fiberglass and PVC pipe.
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