Ключевые слова: blocked, building, cleaning, container, day, dirty, drain, drainage, full, ground, hard, hole, illinois, industry, job, line, lines, maintenance, manhole, open, orange, outdoor, pipe, pump, pumping, repair, safety, septic, service, sewage, sewer, sewerage, site, spring, street, suck, tank, transportation, truck, tube, urban, utility, vacuum, vehicle, waste, water, work, worker, working,