A) is of course the cheapest and least expensive. It is always the "GO TO" first response if a citizen or resident has an environmental concern or a complaint. Simply by waiting them out and as much as possible ignoring them you soon find out how serious they are and if they actually have done their homework on the issue.
B) This is both a long and short term solution. Get some company with a few credentials or degrees working for them who are prepared to do at least a tiny bit of background digging but more importantly speak confidently and boldly as if they are the absolute world's best in their fields of expertise. This would include Morrison & Beatty as well as Conestoga Rovers way back in the late 1980s and early 1990s. If they get caught red handed as Brian Beatty did taking out of context some quotes from hydrogeologist Stan Feenstra then simply "consolidate" them as David Ash of Uniroyal Chemical did. Move on to the next, CRA, and see how they do.
Conestoga Rovers & Assoc. (CRA) did just fine to the point of also being hired by Woolwich Twn. to muddy oops I mean clarify issues around the serious methane problem at the former Bolender Landfill. Yes this is at the north end of Bolender Park where children play including at the splashpad. It was perhaps a little awkward hitting old organics (municipal waste including foodstuffs) while excavating but local residents had indicated that municipal waste was buried behind (west ) their homes earlier on. There had been an active methane gas system drawing out methane gas from the landfill and venting it to the air for years although it was often not working well.
C) Form a committee. Give it zero power and authority other than moral suasion which rarely works on corporations. Put a few "names" on it and away you go, if necessary for years and decades. Pretending to fix a problem is the next best thing to doing nothing.
D) Get serious now. This is a one way street into potentially expensive remediation or removal of buried wastes that also by the way include buried industrial wastes from a number of local industries including Uniroyal, Great West Felt, likely Varnicolor Chemical, maybe Borg and who knows how many others.
With new technology such as that written about in yesterday's K-W Record titled "Waterloo researcher uses microbes to eat methane" which is being studied and researched at the University of Waterloo there are scientific ways to reduce risk and harm caused by explosive methane gas so close to residential homes nearby. All these homes have pilot lights on their gas furnaces, water heaters and other natural gas appliances. If uncontrolled methane enters via the sub-surface through basements or windows then there could be explosions and disasters. Loss of life and resulting culpability however will be mitigated by a Township hiding behind their choice of proven friendly consultants i.e. B).