No friend, it's more straightforward than you seem to see. Petrochemical is leaking in the ground to contaminate the aquifer, thereby turning up in the water well. Ultimately, it's meandering up and emerging into the basement of the home. As this is presumably a new state of affairs from when that water well was dug and tested, it's clearly a consequence of uncontained leakage and environmental contamination resulting from fossil fuel extraction industrial activity conducted with inadequate necessary safeguards as required to prevent all such contamination from being possible then, now, or in some future timeframe, e.g.: the only acceptable standard excludes all such possible contamination, ever, or it's just another sociopathic industrial site, like the Gold King Mine.