No waste material such as garbage, rubbish, gasoline, fuel oil, flammables, soils, tars, chemicals, greases, industrial or agricultural waste, or any other materials of such nature, quantity, obnoxiousness, toxicity, or temperature so as to contaminate, pollute, or harm the waters shall be so located, stored, or discharged in a way that would be likely to run off, seep, or wash into surface or ground waters. Nor shall any such material be allowed to accumulate on any lot of record so as to be unsightly, dangerous or so as to constitute a nuisance. No gasoline storage tanks shall be permitted in a residential district and no more than two cords of firewood may be stored on any parcel located in the R-2 through R-12 Districts. [Code § 12.10-5.]