Main monitoring categories and sampling frequencies include: kiln flue gas stack emissions two (2) stations, groundwater two (2) stations, rain water storage tank two (2) stations, wastewater discharge one (1) station, ground soil two (2) stations, slag two (2) stations, ambient air quality two (2) stations, ambient air Dioxin three (3) stations, ambient dust fall-out three (3) stations, and CZO product two (2) stations, totally 10 categories.