Residents of tony Surfside, Fla., are upset with developers of a Richard Meier-designed Four Seasons resort that dumped toxic sand on their beach and hasn’t removed the stuff more than a year later.

But a catch for any cleanup at the site slightly north of South Beach that will include a hotel and two condo towers is that it can’t upset local turtles. Meier’s famous works include the Barcelona Museum of Contemporary Art and LA’s Getty Center and Paley Center for Media.

After excavating tons of sand last year for a parking garage, Fort Partners — the developer in partnership with Four Seasons Resorts and starchitect Meier — dumped the sand on the public beach. Locals said it looked “dark and dingy.”

The sand was tested and found to have higher levels of arsenic and other toxins than normal. Residents also spotted construction debris including concrete boulders and rusty nails around the beach. (Florida law requires developers who dig sand to replace it or put it near the same site.)

A committee was formed including locals and the developers, but during initial talks, the developers balked at the cost of a proposed plan to move the sand. Another headache is that South Florida’s “turtle nesting season” — when sea turtles lay their eggs in the sand — has begun. Local law prevents disrupting the sand during this season, and local agencies are attempting to delay the removal job until November.

“The residents are fed up,” Deborah Cimadevilla, a Surfside resident of 15 years, told Page Six. “Our health and safety are being jeopardized, and people don’t feel they can use their own beach.”

Last weekend, signs along the village’s main drag, Collins Avenue, read, “Four Seasons throws nails on our beach” and “Clean up our beach.” A source said: “The beach where our kids play is full of nails. They have the money to clean it, I don’t know why they won’t do the right thing.” But another source said Fort Partners plans to move the sand once turtle season is over.

Reps declined to comment.