EPA-105-GA02-03-A108

105

40,000 千元

土壤及地下水污染調查、應變及整治之推動

2016/04/11

2017/10/10

高國源

土污基管會

謝菊蕙

瑞昶科技股份有限公司

土壤及地下水

污染潛勢篩選、高污染潛勢農地、土壤中重金屬

Pollution screening process, High potential pollution agricultural land, Heavy metals of soil

陳慎德；張尊國

林峯儀

02-77060566#143

fengyi@apollotech.com.tw

環保署於99年委辦「全國重金屬高污染潛勢農地之管制及調查計畫」，並於101年、103年續辦「全國重金屬高污染潛勢農地之管制及調查計畫（第2期）」及「全國重金屬高污染潛勢農地之管制及調查計畫（第3期）」，主要工作包含依農業水源供給單元，系統性辦理農地重金屬高污染潛勢評價篩選及驗證，掌握全國重金屬高污染潛勢農地及研擬管制策略；另結合現場調查實務及農地污染防治需求，建立農地調查標準化作業流程，彙整編撰農地土壤重金屬污染調查作業手冊及改善整治技術手冊等；執行期間發現彰化縣和美鎮農地嚴重污染，而促使檢調介入東西二、三圳非法繞排工廠查緝，迄今已成功追償四間業者之農地污染責任約九千萬元，於此同時政府各單位亦透過農水保護方案、工業改排輔導平台、農業用水總量管制等，多管其下以擴大管制力道。 延續前三期計畫成果，環保署續辦第四期計畫，著重於結合農土及農水污染評析成果，調查土壤及相關環境介質之污染情形及辦理關連性分析，加速掌握農地重金屬污染潛勢分布，並依調查結果評估未來處理及改善技術工法。本計畫調查區域為三期計畫篩選之系統性高污染潛勢農地灌溉小組，及引灌高污染潛勢圳路農地範圍之22個灌溉小組。農地土壤調查係採取二階段調查方式，調查結果約91公頃農地超過土壤污染管制標準，污染農地灌溉水主要取自番雅溝排水幹線、洋仔厝溪排水幹線及石笱排水支線等3個導水圳路。 依土壤調查結果完成彙整調查區域污染農地之污染物種類、污染物濃度、坵塊面積及地籍資料，依水路分為「番雅溝排水幹線及洋仔厝溪排水幹線補助引灌範圍」、「石笱排水支線補助引灌範圍」等兩區域規劃農地改善作業，評估農地污染改善方式及所需經費，兩區域列管農地分別計有41.20公頃及49.37公頃污染農地須辦理整治前細密調查，初步預估其中分別36.88公頃及36.52公頃農地以耕犁工法搭配少量排客土及可完成改善解除列管；並辦理渠道底泥及水質採樣分析，完成篩選34處底泥具污染物介入訊號之渠段，並於新圳、新分北圳採集分析出4組重金屬超過灌溉用水水質標準之水質樣品。綜整本計畫環境介質調查結果，完成篩選19處疑似污染源坐落區域，其中主要導水圳路屬番雅溝排水幹線、洋仔厝溪排水幹線、安東二排支線及石笱排水支線之疑似污染源坐落區域分別計有2、9、2及6處，總計有125間疑似污染源標的，其中32間為使用原物料與環境介質污染物具關聯性之列管污染源。

污染潛勢篩選、高污染潛勢農地、土壤中重金屬

8. EPA-105-GA02-03-A108（定稿本）（公開版）.pdf

54MB

2018/1/1 上午 12:00:00

The “Control and Investigation Project for National Agricultural Land with High Potential for Heavy Metal Contamination” was commissioned by the Taiwan EPA in 2010. The following plans “2nd Control and Investigation Project for National Agricultural Land with High Potential for Heavy Metal Contamination” and “3rd Control and Investigation Project for National Agricultural Land with High Potential for Heavy Metal Contamination” were commissioned in 2012 and 2014, respectively. The main tasks of this plan are conducted according to the supply unit of agricultural water: select and verify the potential heavy metal contaminants in agricultural lands systematically; develop the control strategy by understanding the national potential heavy metal contaminants in agricultural lands; structure a standard operating procedure for agricultural lands investigation by combining the demands of in-situ investigation and pollution prevention; finally, aggregate and edit the investigation operating manual and the remediation technology manual of heavy metal contamination at agricultural soil. There was extensive pollution being discovered at farmlands in Hemei Township, Changhua County during the operating period. This discovery has prompted the organ of prosecution and investigation to detect the emission bypass the legal pipeline toward the East-west second and third canals, and has successfully recovered the pollution responsibility of 4 factories in approximate 90,000,000 NTD. In the meantime, departments in government have improved the controlling power in multiple ways through the protecting program of agricultural water, industry emission counseling platform, and the control standard of agricultural water mass limitation, etc. Depends on the performances in the latest 3 period, EPA has continued the plan for the 4th period. The priorities of this plan are as follows: combine the evaluation results in agricultural soil and water, investigate the polluted situation in soil and related environmental medium and conduct the relative analysis, and accelerate the progress to grasp the potential distribution of heavy metal pollutions in farmlands. Finally, make the assessments according to all investigation results in the farmlands to advise the treatment method and the administrative control measurements in the future. The investigation range includes the 22 irrigation units which has been selected in the 3rd period as systematic irrigation units in the farmlands with high potential pollution, and the farmlands with irrigation from the high potentially polluted canal route. There are 2 phase of agricultural soil investigation. The result of the investigation shows that there are approximately 91 hectares of farmland exceeded the Soil Pollution Control Standards. The polluted irrigation water are mainly from 3 guiding canal route: Fan-ya canal drain mainline, Yang-tzu-tso brook drain mainline, and Shih-kou drain branch line. The data of the categories of contaminants in the polluted farmlands, the concentration of contaminants, the area of clumps, and the cadastre of the investigation area has been aggregated according to the soil investigation. To form the farmland remediation and evaluate the budget for the remediation method, the area has been divided into 2 parts according to the canal route: the range of supporting irrigation in Fan-ya canal drain mainline and Yang-tzu-tso brook drain mainline, and the range of supporting irrigation in Shih-kou drain branch line. These 2 parts include 41.20 hectares and 49.37 hectares of farmland, respectively. It is necessary to conduct detailed investigation of the polluted farmlands before the remediation. As the initial evaluation, there are respectively two parts of farmlands in 36.88 hectares and 36.52 hectares could be removed from the control list by conducting the ploughing method with the collocation of soil replacements. The analysis of the channel sediments and water sampling has also been conducted. There are 34 channels with the signals of entering contaminants in the sediments have been selected, and there are 4 units of water samples with heavy metal contents which exceeded the Irrigation Control Standard has been collected at Hsin-tsun canal and Hsin-fen-pei-tsun canal. By integrating the investigation result of environmental medium, 19 positions have been suspected to be the source of contamination after the filtering. There are 2, 9, 2, and 6 positions has been suspected to be the source of contamination in the main irrigation canal route Fan-ya canal drain mainline, Yang-tzu-tso brook drain mainline, An-dong second drain branch line, and Shih-kou drain branch line, respectively. Total 125 plants are suspected as targets of pollution source, 32 plants among them are being controlled as pollution sources by using raw materials which related to the contamination of environmental medium.

Pollution screening process, High potential pollution agricultural land, Heavy metals of soil