Roughly four weeks after the spill took place, many basic details are still unknown to the public, according to recent reporting by InsideClimate News. Questions include what exactly caused the spill, how big was the spill, and how long did it take for emergency responders to react to the spill remain unanswered, just to name a few .

But one thing is certain according to the new study: For the residents of Mayflower, quality of life has been changed forever.

All of these chemicals are hazardous air pollutants (HAPs), "regulated under the 1990 Federal Clean Air Act amendments as the most toxic of all known airborne chemicals," as explained in the press release summarzing the study.

Given the revalations in this latest study, Exxon has proven it has much to cover up, with this study only scratching the surface of the ecological harms of the pipeline spill.

"The spill and response has been a disservice to the community," said Global Community Monitor's Ruth Breech. "People are obviously suffering and experiencing health symptoms from chemical exposure related to the oil spill. State and Federal need to step up immediately to document and prevent any further health issues associated with the Exxon oil spill. Agencies need to share information in a manner to ensure informed decision making and enable access to necessary resources such as medical treatment for chemical exposure."

With a decision looming on the future of the prospective TransCanada Keystone XL tar sands pipeline by the Obama Administration, Mayflower is yet another sordid case study of the hazards that accompany tar sands pipelines wherever they meander.