* ACCC says deal could harm competition
* Bingo shares fall as much as 13.4 pct
* Bingo promises to work with regulator (Adds share fall, adds ACCC chair quote, context, Bingo's response)
Nov 29 (Reuters) - Shares in Australian waste management and recycling company Bingo Industries Ltd BIN.AX plunged as much as 13 percent on Thursday after the competition regulator raised concerns about its $422 million acquisition of rival Dial A Dump.
The Australian Competition and Consumer Commission (ACCC) said the deal could have negative impacts on the market for processing, landfill and collections of building and demolition (B&D) waste.
"The acquisition would remove future competition between Bingo's and Dial A Dump's dry landfills, which may lead to higher gate fees than would be likely without the acquisition," ACCC Chair Rod Sims said in a statement.
The ACCC said it would make a final decision on the matter by February 2019.
Bingo's shares were down 8.4 percent at a one-year low by 2326 GMT, while the broader market was 0.86 percent higher.
Bingo said in a statement it would work with the regulator ahead its final decision.
Bingo had announced the A$577.5 million ($421.7 million) acquisition of its smaller rival in August in a bid to take advantage of a Chinese ban on waste imports. The deal could make the company the biggest waste collector in Sydney, Australia's most populous city. which took about a third of Australia's rubbish, earlier this year stopped accepting waste shipments such as plastic and paper as part of a campaign against "foreign garbage". = 1.3695 Australian dollars)