The site survey includes the collection of soil and groundwater samples by detection technology. If it is a cement site and needs blasting, some samples of sediment, surface water and indoor air need to be collected according to the actual situation. And look for underground pipes, water tanks, cans, smelly garbage and so on. On-site investigation is a complex project with heavy workload, heavy task and high difficulty, which requires a lot of time, energy and cost, and has high requirements for third-party testing institutions. It is recommended to go to Cai Hua, Zhejiang for inspection. They have strict procedures and standardized procedures in field investigation, and can also be customized according to the needs of investigation. You can contact them if necessary.