Planning

Inspect the factory, identify pollution sources, and take samples from raw materials, products, production water, intermediate products, and production equipment. When sampling, pay attention to sensitive materials and equipment. Generally speaking, materials with high water content, such as emulsions, production water, and washing water, and certain key parts such as tank lids, filters, and storage tanks should be highly focused on. Materials with low water content, such as compressed air, film-forming aids, and pigments, are basically not infected. However, some fillers, depending on their water content, such as those exposed to rain and moisture, often have spores.