| 英文摘要 |
The scope of work includes investigation and maintenance of groundwater monitoring wells; management of storage systems and investigations and verification of announced facilities; periodic monitoring for monitored natural attenuation; supervision and verification of contamination sites; heavy metal monitoring in farmland; monitoring of heavy metals at farmland sites and synchronous sampling of crops and soil; supervision and verification of farmland contamination removal; operations for the prevention of contamination in farmland and facilities; site investigation and assessments of sediment environments; management of public complaints and emergency response. The plan had been executed from January 1st 2024 to November 30th 2024, and the results of implementation were summarized as follows:
The groundwater monitoring wells investigation for 124 regional and located monitoring wells was completed. Also finished 11 exterior appearance maintenance, 4 facilities repairment, 14 conditional assessments, 9 purges and 5 foreign matter exclusion. For the task of storage system management, there were 25 underground storage tank systems and 30 aboveground tank systems improvement tracking and re-evaluation completed. The assessed enterprise had conducted on-site inspections and interviews for 23 factories, then investigated 8 operators. Among the results, 2 sites had heavy metals in the soil exceeding the soil pollution control standards, 1 site had heavy metals exceeding the soil pollution monitoring standards, the remaining sites were below the soil pollution monitoring standards.
Periodic monitoring for monitored natural attenuation involved the sampling and analysis of four standard well throughout dry seasons within the site of Qiangxin Electric Co., Ltd. All results showed pollutant concentrations below the second-class groundwater pollution monitoring standards. It is recommended to monitor again next year to confirm stable or decreasing pollutant trends before applying for delisting. The operation involving supervision, inspection, management, and verification of contaminated sites successfully conducted regular inspections at a total of 61 contaminated sites, with verification for improvement carried out at 15 listed sites.
In the heavy metal monitoring task for farmland, we completed 160 sites monitoring and soil sampling. Among them, we found that the soil heavy metal concentration of 4 of farmlands exceeded the standard value for edible crop farmland. Additionally, also completed synchronous sampling of 100 crops and soil.
In supervision and verification of farmland contamination removal part all sites under this year’s remediation plan passed supervision and verification, including soil fertility verification, total of 4 plots (5 land parcels) were verified, covering an area of approximately 1.1527 hectares.
In farmland contaminated prevention operations, 196 on-site inspections were conducted, along with 415 monitoring operation. Among these, 35 sites fell between edible crop monitoring standards and control standards, primarily in pollution prevention areas. In terms of water quality monitoring, 61 initial water quality inspections, 7 re-inspections, and continuous monitoring at 15 high-pollution risk channels were completed. In terms of resin bag monitoring, was carried out at 37 locations with 100 units of resin bag were used, focusing on areas exceeding control standards or irrigation water benchmarks. Three locations showed heavy metal concentrations exceeding threshold values, but converted water concentrations were below irrigation water benchmarks. Comprehensive review suggests agricultural soil was influenced by sediments in irrigation ditch, with no significant pollution detected. Facilities contaminated prevention completed 39 on-site inspections and prevention management for Group A (Enhanced Management Group) businesses. In the investigation and sampling operation, 7 cases were selected, with 3 exceeding soil pollution control standards, 2 sites were between monitoring and control standards and 2 not exceeding soil pollution monitoring standards. For Group B (Self-Management Group), data checks for 95 main contaminated prevention management plans were completed, along with on-site checks for 13 companies and completed on-site inspections for 11 enterprises. Group C (Inspection Management Group) completed 9 on-site inspections, recommending 3 companies to adjust to Group B (Self-Management Group). The site investigation and assessment of two ditch's sediment have been completed. Based on the result, it is recommended to maintain the current sediment sampling locations and continue monitoring the surrounding pollution sources.
In public complaints and emergency response operations, 3 sites underwent soil and groundwater investigation operations.
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