EPA-100-G102-02-A086

100

10,685 千元

2011/03/31

2012/03/30

蔡昀達

土污基管會

張良麗

中興工程顧問股份有限公司

土壤及地下水

監測井管理，地下水水質，監測井

Monitoring Well Management, Groundwater Quality, Monitoring Well

劉志忠

林怡君

02-27698388#20274

yclin5857@mail.sinotech.com.tw

本計畫主要協助環保署辦理監測井監測及管理相關工作，包括監測井維護、地下水水質資料彙整及趨勢評析、監測計畫規劃及調整建議、各單位監測資訊整合，以及相關地下水水質議題探討，並提出地下水污染監測標準及管制標準建議。 有關監測井維護作業，主要係為延續民國93~99年之監測井功能評估與維護工作，健全區域性監測井功能，以確保水質採樣之代表性。本計畫共計完成100口監測井之井況評估工作、100口監測井之高程測量與驗證作業；依據井況評估成果，研判並辦理60口監測井之再次完井、完井成效驗證及完井後水質採樣分析工作，建構區域性監測井水質特徵及積垢潛勢分析，並依據前述成果完成監測井資料驗證及更新；另為維持監測井功能正常，完成6口監測井之異物排除、1口廢井、3口監測井重新設置及2口監測井平台/基座改善工作。 監測井管理及地下水質變化趨勢評析部分，本計畫以Mann-Kendall統計方式完成全國10大地下水區區域性監測井之水質趨勢分析，共納入412口監測井進行評析，趨勢分析及法規值比對結果顯示，共有73口超過監測標準且具上升趨勢、299口水質變化趨勢穩定、另40口則從未超過監測標準。431口區域性監測井中，建議調降其中339口監測井之監測頻率為1年2次，其餘92口則因曾有水質測項超過監測基準且呈現上升趨勢或未累積足夠監測數據，建議保持1年4次之監測頻率。此外，亦協助環保署辦理各單位監測資訊整合作業、擬訂相關具體配套方案及平台功能規劃等。 地下水相關議題研析部分，完成蒐集彙整我國沿海地區土壤及地下水鹽化資料，並提出水井管理及產業規劃方針。辦理國內地下水中鐵、錳、砷環境流布調查及嘉義縣溪口國小現地試驗，建立地質沉積物與地下水之相關性；彙整研析地下水中鋅含量對人體健康影響之相關資料；完成蒐集地下水中鉻的來源與轉換機制及健康風險評估，並提出地下水污染監測標準及管制標準之檢討建議。 另亦協助環保署辦理「監測井管理」考核作業；辦理完成4場次有關監測井設置與維護技術之示範觀摩，以及1場次監測資訊整合研商會議；配合完成「地下水水質監測井設置規範」研修作業，並完成「地下水監測井井鎖統一管理規劃」。

監測井管理，地下水水質，監測井

EPA100G10202A086.pdf

34MB

2012/7/1 上午 12:00:00

This project was to assist the EPA in groundwater monitoring and monitoring wells management, including monitoring wells maintenance, groundwater quality trend analysis, adjustment and recommendations of the monitoring program, and monitoring data integration of various monitoring units. This project also concerned about the groundwater quality issues and offered recommendations of the Groundwater Pollution Monitoring Standards and Control Standards. The maintenance of the Regional Groundwater Monitoring Wells (RGMWs) was continued the previous projects from 2004 to 2010, which improved the RGMWs functions, kept the RGMWs conditions and ensured the representation of groundwater sampling. This project completed well condition assessment of 100 RGMWs, also completed height determination and verification of 100 RGMWs. According to the results of well condition assessment, 60 RGMWs were selected to perform well redevelopment. After evaluating the well redevelopment effects, the groundwater of the wells were sampled and analyzed to construct the groundwater characteristics and fouling potential analysis of the RGMWs. In order to maintain the normal function of the RGMWs, this project removed abnormal objects from 6 wells, executed decommission of 1 well, installed 3 new wells, and rehabilitated the foundation (the concrete ground surface around the well) of 3 wells. For monitoring wells management, this project analyzed groundwater quality trend of RGMWs in 10 national groundwater districts by Mann-Kendall Test. There were 412 monitoring wells were performed trend assay and compared with the regulatory standards. The results indicated that the water quality of 73 wells exceeded the standard value with upward trend, 299 wells were stable, and 40 wells never exceeded the standards. It was suggested to lower the monitoring frequency of 339 RGMWs to two times a year, 92 wells were proposed to maintain the monitoring frequency for four times a year. In addition, we assisted the EPA in the monitoring data integration from various ministerial units, in developing the practice programs of integration and in planning the functions of monitoring information template. In this project some groundwater related issues were discussed. We collected and analyzed salinization data of the soil and groundwater in coastal area and proposed wells management and industrial planning policy. To comprehend the correlation of geological sediments and groundwater, this project investigated the environmental distribution of iron, manganese and arsenic and completed an on-site test at Xi-kou elementary school in Chaiyi County. We also collected the documents of zinc in the groundwater about human health effects. According to the references of the source and conversion mechanism of chromium in the groundwater and health risk assessment, we reviewed the Groundwater Pollution Monitoring Standards and Control Standards. This project assisted the EPA to inspect the efficiency about monitoring wells management. Besides, we also held in 4 demonstrations on installation and maintenance of monitoring wells, as well as a meeting about monitoring information integration. The revised draft of “Standard practice for design and installation of groundwater monitoring wells” and the planning of locks unified management of groundwater monitoring wells were accomplished.

Monitoring Well Management, Groundwater Quality, Monitoring Well