So, let's say, ~completely theoretically~ you knew, beyond a reasonable doubt, a large oil company was doing something nefarious near you. They own a very strange property through a shell company. Now, it's possible that it's just some kind of tax evasion-they claimed it was a "beautification" project after you emailed several people with no response-but all they've done is stack dirt piles very high. This completely theoretical property also just happens to be completely devoid of plant life, and according to the NPMS there is a pipeline nearby. Would an elevated level of carbon in the soil potentially be indicative of contamination by hydrocarbons? If not, is there any other way to test for this? Sorry if this is the wrong place to post this kind of question, but I couldn't really find anywhere else :)
Also, I know it's probably not an oil spill, but I do have evidence that there's something going on and I'm just trying to rule this out. Thank you!