The waste hauler set to benefit from a proposed exemption to the Big Apple’s stringent caps on trash hauling employed the son of the lawmaker who led the fight to create the loophole, The Post has learned.

The company, Royal Waste Services, hired Councilman I. Daneek Miller’s son in August 2017 and he remained on the company’s payroll through at least 2019, according to records the company filed with city officials at the time.

That means that Miller’s son, Coron, was employed by Royal Waste as the lawmaker led the effort in 2018 to kill legislation that initially imposed the caps and for at least one of the years that Miller, himself, says he worked to weaken the reforms.

Those efforts controversially culminated in July when Council Speaker Corey Johnson fast-tracked Miller’s legislation, which would have lifted the caps for haulers in his Queens district for four years — before reversing course amid allegations of favor-trading.

Good government advocates called for the city’s ethics watchdogs — including the Conflict of Interest Board — to probe the connections between Miller and Royal.

“There’s enough here to warrant an investigation by COIB and the Department of Investigation,” said John Kaehny, the executive director of good government group Reinvent Albany.

In response to questions, Miller (D-Queens) said that his son left the company “more a year ago,” but could not provide an exact date. He denied that Coron’s employment had any bearing on his repeatedly efforts to undo the 2018 hauling caps.

“He’s driven for many local businesses throughout, he drives a truck,” Miller said. “There’s obviously no story, didn’t have anything to do with it.”

Repeated efforts to reach Coron by phone and at his listed address in Queens were unsuccessful.

Representatives for Royal told a Post reporter who visited the waste station recently that Coron no longer worked there and had not for some time.

When asked how long, an apparent manager who declined to identify himself, responded: “a year, maybe two years, maybe longer.”

He declined to provide any records and asked the Post to leave the premises.

Environmentalists said Miller’s bill would cut a major loophole in a 2018 law that slashed the capacity of waste transfer stations in four community boards to improve living conditions and street safety by reducing the number of trucks passing through.

Miller’s Community Board 12 was one of the districts covered — trash stations located there were cut by 33 percent.

However, the overhaul exempted transfer stations that ship garbage out of the city via barge or rail access to bolster non-truck-based trash shipments.

Miller’s legislation would lift the cap on the facilities for as many as four years, provided the owners of those sites file plans to bring in rail access.

Royal had such a proposal and Miller argued the company needed the caps lifted to secure financing for the project, though he also argued his bill would not increase the number of trucks on nearby streets in the interim.

The lawmaker told The Post that he began pursuing the legislation as soon as the reforms were passed — a timeline that places his son on Royal Waste’s payroll — but denied it amounted to a conflict-of-interest.

“Absolutely not, this is about a community,” he said. “We were very much conscious of maintaining that separation.”

Royal Waste was required to provide a list of employees to the Business Integrity Commission as part of its application that year to renew its license for trash hauling in five boroughs. The agency is tasked with rooting organized crime out of the once mob-plagued industry.

The Post obtained the records from the BIC under the state’s Freedom of Information Law.

Both Miller and Johnson are leaving office at the end of the year under term limits.

The Queens lawmaker introduced the measure in June and was the sole sponsor of the legislation.

Johnson (D-Manhattan) shocked supporters of the 2018 caps by fast-tracking the bill after scoring a ranked-choice endorsement from Miller for his failed bid for city Comptroller.

Supporters of the caps imposed in 2018 charged that Johnson and Miller were trading political favors, allegations the pair vigorously denied. 

Johnson reversed course and pulled the measure from the Council’s agenda the day that the vote was supposed to occur — a vote that was scheduled to take place while the chief supporter of the 2018 caps, Councilman Antonio Reynoso (D-Brooklyn), was out of the country.

“The Speakers and his office did not know about the familial relationship prior to the Post raising the question,” said a spokeswoman for Johnson in a statement. “The bill was not voted on because of policy reasons.”