100

7,010 千元

2011/02/01

2011/12/15

劉志忠

宜蘭縣政府環境保護局

蕭培元

中興工程顧問股份有限公司

土壤及地下水

土壤及地下水污染調查及查證工作

Soil;Groundwater

蔡昀達

02-27698388#

ada@mail.sinotech.com.tw

本計畫主要目標為針對龍德工業區內台化龍德廠周邊地區、梅洲地區、公眾遊憩活動等公園用地及具污染潛勢之地區進行土壤品質調查工作，並針對縣內既設場置性地下水監測井進行地下水監測工作，並辦理監測井外觀維護工作、相關廢井作業及標準監測井設置作業，以及進行縣內加油站現場查核工作，協助支援縣內緊急應變調查，以達到本縣長期維護管理土壤及地下水品質目標。計畫執行期間自100年2月1日起至100年12月31日止。茲將本計畫主要執行工作內容辦理情形摘要說明如下： 一、土壤品質調查 (一) 龍德工業區內臺化龍德廠及其周邊 1. 完成龍德工業區內臺化龍德廠周邊20點次土壤調查，調查項目主要為8項重金屬以及揮發性有機物等，調查結果發現土壤有鋅達到土壤管制標情形，初步研判為回填土方或曾堆置廢棄物所致。 2. 建議應要求土地關係人可針對污染範圍進行細部調查，以掌握污染全貌，環保局可從旁協助輔導協商與溝通之工作，以協助土地關係人儘速完成污染改善工作。 (二) 梅洲地區土壤多氯聯苯項調查 完成梅州地區土壤調查，調查項目包括為重金屬、總石油碳氫化合物、多氯聯苯及揮發性有機物等，先於100年2月10日進行現勘訪談，並採用分階段方式，分別於100年5月12日以及10月17日進場採樣調查，依據調查結果發現，土壤有銅、鎳、鉻及多氯聯苯超過土壤管制標準。 (三) 具污染潛勢之地區 1. 龍德3號抽水井本年度調查，土壤砷濃度仍超過監測標準。經土壤連續取樣，發現附近之天然土壤性質砷與鐵、錳皆偏高，農地土壤砷含量偏高，應為抽水井中天然因素所造成。 2. 台灣中油員山加油站因自行發現漏油並已完成污染改善，本計畫已完成土壤及地下水採樣及驗證，檢測結果未超過標準。後續加油站應定期依相關法規進行設備維護及監測。 3. 頭城1號公園根據99年與本年的檢測數據，靠近東北側之區域，鄰近蘭陽博物館區，土壤砷含量超過監測標準。由於本區並無持續外添加之砷污染源，因此砷濃度應不至於再持續增加。不過，本區目前已開發為蘭陽博物館公園綠地，人員活動較為頻繁，因此有必要確認整區之砷濃度分布，並進行長期監測。 (四) 公園用地 已完成50點次土壤調查，根據本次調查結果，宜蘭地區大部分之公園綠地，土壤品質良好，並未發現超過管制標準，然在頭城海水浴場檢出土壤砷濃度超過監測標準，由於頭城海水浴場目前仍為開放民眾露營營地，因此民眾接觸土壤的機會頗高，基於風險控管原則，應釐清本區土壤品質，並且避免民眾接觸。 (五) 緊急應變 依據環保局指示協助完成本縣13場次土壤或地下水相關污染案件之採樣分析及調查等工作，其中有冬山鄉寶慶路疑似棄置廢棄物陳情案土壤之鎳達到管制標準、宜蘭市梅洲新段313地號調查土壤之銅達到管制標準、龍德工業區大排陳情案底泥調查之底泥重金屬鉻、鉛及鋅超過土壤管制標準。 二、監測井維護及地下水採樣調查 (一) 整90年9月至100年10月22口場置性監測井歷次監測數據，經趨勢分析及法規值比對，發現除親水公園(G00028)之氨氮項目超過第二類地下水污染監測標準且具有上升趨勢外，其餘21口監測井水質變化趨勢均屬穩定。 (二) 完成3口監測井廢井及重設工作（東南鹼業-F003、南屏國小-F016、育英國小-F022）。 (三) 由井中攝影結果發現，井內積垢情形嚴重者共計有15口；井底或井體中發現異物者共計有2口；井體遭樹根入侵者共計有1口。 三、加油站網路申報及現場查核工作 (一) 完成99年第4季至100年第3季加油站網路申報審核工作，業者申報率均為100%。 (二) 完成縣內10家加油站監測資料及加油站設備查核工作、測漏管功能測試及油氣檢測，其中共計有1站之測漏管功能不彰，；計有2站氣檢測結果偏高。 四、其他配合性工作 (一) 完成3場次土壤及地下水污染防治之相關法規說明會以及2場次環境教育說明會，整體出席率良好成果豐碩。 (二) 完成每月一次本縣區內污染場址周界進行綠美化與定期巡檢與清理工作，並於環保署「清淨家園顧厝邊綠色生活網（Eco-life）」設置部落格，定期更新場址整治進度。 (三) 完成環保局土壤及地下水污染整治業務之中英文雙語專屬網站改版作業，並每月維護更新一次網站資訊。 五、結論與建議 (一) 環保局應要求龍德工業區臺化龍德廠土地關係人可針對污染範圍進行細部調查，環保局可協助儘速完成污染改善工作。 (二) 針對梅洲地區多氯聯苯問題，建議環保局依土污法相關規定進行管制，土地關係人應先釐清上述污染形成原因，在予以辦理後續改善工作。 (三) 另建議後續梅洲地區多氯聯苯問題於細部調查或環保局進行增測時可增測土壤TPH以及戴奧辛項目。 (四) 未來環保局可持續擴大調查縣內之鋼鐵業別進行擴大普查，以保護縣內土壤品質。 (五) 持續針對縣內監測進行定期水質監測，22口場置性監測井中，僅有親水公園(G00028)之氨氮項目曾超過第二類地下水污染監測標準且具有上升趨勢，建議採1年4次之監測頻率；21口水質監測結果曾超過監測標準但呈現穩定或下降趨勢，建議採以1年2次(地下水豐、枯水季各一次)執行相關監測工作。 (六) 針對監測井井內積垢情形嚴重者，應進行再次完井工作，俾利提高監測井壽命，以取得代表性地下水樣。 (七) 針對縣內場置性監測井高程部份，建議可採引用一等水準點進行高程校正及告示牌更新，亦可長期配合水質採樣量測水位，於縣內網頁定期作地下水高程水位流向供民眾及學術單位參考。 (八) 加油站測漏管積水過高，可採用自動量測液面抽水裝置，以避免測漏管阻塞，或建議業者以其他監測方式(如地下水井監測、密閉監測等)進行監測。另本年度油氣檢測濃度偏高之加油站，建議站方加強監控站內設施是否需進行汰換或更新，以及加強站方檢測合格人員訓練，必要時由檢測機構進行檢測，確認申報數具品質之代表性。另環保局可加強追蹤監控，必要時可列入後續環保署/環保局之土壤及地下水調查計畫對象。 (九) 本計畫緊急應變所辦理之土壤及地下水超過標準之場址，建議環保局依據土污法命污染行為人採取應變措施，環保局則可從旁協助輔導監督，以妥善處理並加速完成污染改善工作。 (十) 另本年度緊急應變之宜蘭縣大同鄉長期施用雞糞堆肥農田土壤重金屬累積調查，環保局可針對本縣大同鄉四季、南山等地區大範圍調查累積土壤及作物之基線資料，以作為後續政策擬定之參考。 (十一)根據龍德三號井附近農地調查結果，農地砷偏高之原因，為灌溉用水所引起，建議農業等主管單位，應另外引用其他水源，但若必須引用本區地下水時，建議可事先預處理，例如曝氣沉澱，降低水中砷含量後，再引水灌溉。在上述之因素尚未排除之下，仍需定期檢測本區域農地，瞭解重金屬含量之變化。 (十二)本縣總計40處已開發都市計畫區公園用地，本次完成17處調查，併同去(99)年曾調查之12處，總計已完成29處，意謂完成72.5%之公園用地品質調查，後續可依照本計畫建置之方法，完成其他公園用地品質調查。另外本次調查之頭城海水浴場與鄰近之頭城1號公園，亦發現相同土壤砷含量偏高情形，因此後續需釐清頭城沿岸地區是否皆有此問題。

土壤及地下水污染調查及查證工作

100年度宜蘭縣土壤與地下水污染調查及查證工作計畫完整版PDF.pdf

71MB

2012/2/1 上午 12:00:00

Origin In recently years, along with different levels of environmental protection governments continuous conducting related plans, how to understand validly the potential contamination conditions of soil and groundwater and practice appropriately contingency plans is the first topic for environmental protection governments and related industries. Objects 1. According to the past investigation results found the areas where exceed the Soil or Groundwater Pollution Monitoring Standards, the analysis and control of contaminated source zone has to be proceed due to control and establish the long-term local environmental quality data of soil and groundwater. 2. To reduce risks of the people health and residential environmental safety. 3. To attain the efficiency of prevention and block the pollution thus avoids wasting the resources because of pollution remediation in the future. 4. Due to necessaries at other areas in Yilan, all kinds of emergency responses could support flexibly at adapted time to help the investigation of soil and groundwater pollution condition. 5. To attain the objects of establishing data bases and long-term analysis of environmental quality by keying in all analysis data to soil pollution control system. Practice results This project was practiced from February 2 to December 31 in 2011. The main results of this project was shown as follows: 1. Soil quality investigation (1) Formosa Chemicals & Fibre Corporation (FCFC) and periphery located at Lung-Te Industrial Park 20 points of soil investigation were completed. The main terms of investigation were 8 items of heavy metal and volatile organic compounds (VOCs). The results revealed that the Zn in soil has reached the Soil Pollution Control Standards because of backfill or deposited wastes by preliminary conclusion. (2) Investigation of PCBs in soil at Meizhou area The investigation terms included heavy metals, total petroleum hydrocarbon (TPH), polychlorinated biphenyls (PCBs) and VOCs. According to the results, it shown the heavy metal of Cu, Ni and Cr and PCBs in soil exceed the Soil Pollution Control Standards. (3) The potential pollution area a. The As concentration in soil still has exceeded the monitoring standards with edible food crops agricultural land near Lung-Te No.3 pumping well. By the soil sequent sampling, it was found that As, Fe and Mn in natural soil have high concentration near well, replied high As concentration in agricultural land because of natural factors in pumping well. b. The Yuanshan petroleum station of CPC found the oil leaky by itself and has completed the pollution improve. After sampling and analysis of soil and groundwater in this project, the results did not exceed the standards. c. According to the analysis results of 2010 and this year in Toucheng Park No.1, As concentration in soil exceed the monitoring standards near the Northeast area and closed to the Lanyang Museum. This area has developed park of the Lanyang Museum, thus lot of people activity frequently here. Therefore, it has to confirm the As contaminated area and proceed the long-term monitoring. (4) Park Area 50 points of soil survey have been completed. Almost part of the Yilan park areas have good soil quality and did not exceed any control standards. However, the soil sampling in Toucheng Beach, As concentration was detected exceed the soil monitoring standards. Since Toucheng Beach is currently still open for public camping activities, the chances of people contact with the soil is relative high. Based on risk management principles, people should prevent from exposure to the soil before the quality of soil confirm. (5) Emergency Responses The completion of 13 cases of soil or groundwater contamination investigation included the petition case of Dong-Shan township Bao-Qing road suspected of dumping Ni waste soil which exceed control standards, Meizhoushin section No. 313 survey of the copper soil in Yilan City which exceed control standards and petition case of sediment in channel investigation exceed Cr, Pd and Zn control standards in Lung-Te Industrial Park. 2. Monitoring wells maintenance and groundwater sampling survey. (1) From September 2001 to October 2011, 22 specific wells were installed to monitor groundwater. After collecting the monitoring data and trend analysis versus regulatory values, it was found that at River Park (No. G00028), ammonia item exceed the second category of groundwater pollution monitoring standards and has a rising trend, the trend of groundwater quality of remaining 21 monitoring well were stable. (2) To complete three abandoned monitoring well and restoration again. (Sesoda Corporation-F003, Nan-Ping elementary school-F016, Yue-Ying elementary school-F022) (3) From the results of well bore video, it was found that 15 wells have the serious fouling in well bore. Two wells was found foreign objects and removed. One of the fifteen wells has been invasive by tree roots. 3. Gas station on-line declaration and on-site inspection and appraisal (1) The periodic appraisal of gas stations online declaration was completed during fourth quarter of 2010 and the third quarter of 2011. The gas station owners’ declaration rates were 100%. (2) The oversee of monitoring instruments including pollution preventing equipments functions and oil gas detection were completed in 10 gas stations in YiLan. One of stations had dysfunctional oil gas detection wells. The oil gas detection results indicated that two of stations had higher oil gas concentration. 4. Other Works (1) Three soil and groundwater pollution control regulations sessions and two environmental education sessions were conducted. (2) Monthly inspection and cleaning work at the contamination sites were completed. The site remediation progress information upload to The EPA " Eco-life website" periodically. (3) The soil and groundwater pollution remediation website of YiLan EPB was revised and updated monthly.

Soil;Groundwater