The tasks of this project consisted of investigating agricultural sites for suspected heavy metals pollution, validating remediation and routine field patrolling of the regulated pollution sites, emergency response to the environmental pollution cases and assisting in the pollution investigation and prevention management for Tao Yuan County.
The sampling and analysis work for soil, sediment, and groundwater are in progress. At the present stage, thirteen soil samples have been collected from the sites for analysis. The analytical results for heavy metals indicate that cadmium, copper and zinc exceeded the food crop agriculture land soil pollution control standards in three agricultural site soil sample, chromium and copper exceeded the soil pollution control standards in one industrial site, total petroleum hydrocarbons exceeded the soil pollution control standards in three oil pollution site, and chromium and zinc exceeded the soil pollution control standards in one waste site, Environmental Protection Bureau (EPB) has promulgated the lots as regulated pollution sites. The analytical results of five regulated soil pollution sites were verified to be in compliance with soil pollution control standards and the EPB will remove these sites from the regulated list accordingly.
Two sediment samples were also collected for analyses. The results indicate that lead, cadmium, copper, zinc, and nickel concentrations also exceed the upper limits of the sediment quality indicators promulgated by the Taiwan Environment Protection Administration.
Eight groundwater investigations were also collected for analyses. The results indicate that benzene, toluene, chlorobenzene, 1,4-dichlorobenzene, 1,2-dichloroethane, and phenols concentrations also exceed groundwater pollution control standards in one industrial site, benzene exceeded groundwater pollution control standards in one gas station, benzene and total petroleum hydrocarbons as diesel exceeded groundwater pollution control standards in one oil pollution site, and the remaining five are in compliance with the groundwater pollution control standards.
The other routine work completed includes guarding the regional monitoring well, maintenance and repair for 23 wells, four monitoring wells were installed in the three pollution sites respectively, and bi-monthly patrolling of the regulated pollution site. Ten public awareness meetings were held. In addition, the field specialists also provided assistance in reviewing the remediation reports and work plans submitted by the corresponding parties.
The project has assisted the Environmental Protection Bureau (EPB) with supervising the soil and groundwater cleanup for the regulated sites, verification of the pollution sites, reviewing the reports submitted for the gas stations and regulated pollution sites, and investigating civil complaints. For the future project, we suggest that, supervise the improve progress of contaminated sites. Also apply more aggressive technique, like soil gas test, to find out potential contaminated sites and prevent the pollution spread. The GIS database build by EPA is a useful tool to layout the future strategy to manage the soil and groundwater protection and it should be utilized more often in future project.