NEW ORLEANS -- BP and the Obama administration face mounting complaints that they are ignoring foreign offers of equipment and making little use of the fishing boats and volunteers available to help clean up what may now be the biggest spill ever in the Gulf of Mexico.

The Coast Guard said there have been 107 offers of help from 44 nations, ranging from technical advice to skimmer boats and booms. But many of those offers are weeks old, and only a small number have been accepted, with the vast majority still under review, according to a list kept by the State Department. And in recent days and weeks, for reasons BP has never explained, many fishing boats hired for the cleanup have done a lot of waiting around.

A report prepared by investigators with the House Committee on Oversight and Government Reform for Rep. Darrell Issa, R-Calif., detailed one case in which the Dutch government offered April 30 to provide four oil skimmers that collectively could process more than 6 million gallons of oily water a day. It took seven weeks for the U.S. to approve the offer.

White House spokesman Robert Gibbs on Thursday scorned the idea that "somehow it took the command 70 days to accept international help."

"That is a myth," he declared, "that has been debunked literally hundreds of times."

He said 24 foreign vessels were operating in the Gulf before this week. He did not specifically address the Dutch vessels.

The help is needed. Based on some government estimates, more than 140 million gallons of crude have now spewed from the bottom of the sea since the April 20 explosion that killed 11 workers on the Deepwater Horizon oil platform, eclipsing the 1979-80 disaster off Mexico that had long stood as the worst in the Gulf.

Still, more than 2,000 boats have signed up for oil-spill duty under BP's Vessel of Opportunity program. The company pays boat captains and their crews a flat fee based on the size of the vessel, ranging from $1,200 to $3,000 a day, plus a $200 fee for each crew member who works an eight-hour day.

Rocky Ditcharo, a shrimp dock owner in Buras, La., said many fishermen hired by BP have told him that they often park their boats on the shore while they wait for word on where to go.

"They just wait because there's no direction," Ditcharo said. He said he believes BP has hired many boat captains "to show numbers."

"But they're really not doing anything," he added. He also said he suspects the company is hiring out-of-work fishermen to placate them with paychecks.

Chris Mehlig, a fisherman from Louisiana's St. Bernard Parish, said he is getting eight days of work a month, laying down containment boom, running supplies to other boats or simply being on call dockside in case he is needed.

"I wish I had more days than that, but that's the way things are," he said.

Billy Nungesser, president of Louisiana's hard-hit Plaquemines Parish, said BP and the Coast Guard provided a map of the exact locations of 140 skimmers that were supposedly cleaning up the oil. But he said that after he repeatedly asked to be flown over the area so he could see them at work, officials told him only 31 skimmers were on the job.

"I'm trying to work with these guys," he said. "But everything they're giving me is a wish list, not what's actually out there."

A BP spokesman declined to comment.

Newly retired Coast Guard Adm. Thad Allen, the government's point man for the response effort, bristled at some of the accusations in Issa's report. "I think we've been pretty transparent throughout this," Allen said at the White House. He disputed any suggestion that there aren't enough skimmers being put on the water, saying the spill area is so big that there are bound to be areas with no vessels.