According to the Law of People's Republic of China (PRC) on the Prevention and Control of Environmental Noise Pollution, processing marinated vegetables in residential areas and selling them in shops has affected the health of neighbors, which belongs to environmental noise pollution and should be managed by the competent department of ecological environment.

Specifically, the competent department of ecological environment shall be responsible for formulating measures for the prevention and control of environmental noise pollution, implementing unified supervision and management on the prevention and control of environmental noise pollution, investigating and handling environmental noise pollution, and imposing administrative penalties on acts that violate the provisions of this Law.

If it is found that someone is processing marinated vegetables in a residential area and selling them in a store, which affects the health of neighbors, they can report to the competent department of ecological environment, and the competent department will investigate and deal with them. At the same time, you can also report the situation to the property company or the owners' Committee, and they will come forward to coordinate and solve it.