1. To the areas whose pollutant concentrations above the soil and underground water monitoring standards, the project proceeds the tracing and controlling of pollution sources, and builds up the soil and underground environment quality data, to policy-decision reference and proper management.
2. To reduce the risk of the public health and environment.
3. To achieve the preventing goal.
4. To support the emergency demands.
5. To build up the data base for the long term environmental quality analysis.
From 2010, Feb. 9 to 2010, Dec. 15.
C、Project Implementing Results
1. Water quality analysis of field monitoring well
The first and third seasons of this year, the underground water quality is similar to the last years for the pass rate, the items for these lower pass rate are ammonia-nitrogen, Fe and Mn. As to Fe, there are ten monitoring well to fail, It’s not a big change comparing the last years. As to NH3-N and Mn, the pass rate increase comparing the last years. NH3-N is produced from human activities such as industrial wastewater, sewage, agricultural fertilizer and animal fecal.
In the third season monitoring, As concentrations of the upstream monitoring well F012 and the downstream monitoring well F013 are above the controlling standard, It could be owing to the earth chemical reactions. To F013 well, the total dissolved solid , total hardness, chloride, NH3-N, Fe and As are above the monitoring standards, the total dissolved solid is much higher than the monitoring standard.
2. One Point Flow Direction Analysis for 22 Monitoring Wells：
The one point flow direction analyses were finished from 2010 Apr. 7 to Apr. 8, results showed F002、F004 、F005、F006、F007、F008、F009、F011、F17、F022 wells were the types groundwater discharge to river, F014、F015、F018、F019wells were the types river discharge to groundwater. Because of a pump operation, it is difficult to analyze the flow direction of F001. The flow directions of F010 and F023 are opposite, the team consider it is because of human interference. Two monitoring wells in Don-sun river had the opposite flow dirction to the Don-sun river, F012 could be affected by the agricultural pumps. F013 away from Don-sun river, could be affected by northern drainage. The flow direction of F021 was opposite to the groundwater, it could be affected by agricultural drainage or the Pacific Ocean. F003 without water and F016 because of tilt, were not analyzed for the flow velocity and direction.
3. To the companies in I-Lan county, there were two regulation claim meetings for Soil and Grounderwater remediation.
The first meeting was held on 2010 Jun. 17 for soil and groundwater pollution related regulations, There were 64 gas stations to anticipate.
The second meeting was held on 2010 Nov. 9 for code 8 and 9 of soil and groundwater remediation regulation, the meeting was very successive.
4. Management of Soil and Groundwater Pollution cases：
According EPA requirement, the team investigate Su-Oh township Yeon-An section 1015, 1088, 1088-1 and 1089 land sites. The case was claimed by the public because of unknown disposal. The team analyzed 8 metals and sampled 5 points, results showed none beyond the monitoring standards.
The public claimed Ton-Oh cemetery factory, according to EPA, The team anlysyzed 8 metals and sampled 3 points, results showed no pollution.
To Pin-Chin oil leakage case, EPA required to sample two points of agricultural land and one point of drainage bottom soil to analyze total petroleum hydrocarbon which were all lower to the regulated standards.
For Mei-Chou-Shin section 313 land site, the team took three samples, Cu concentration at IL99-YL-S535 point is 945 mg/kg beyond the regulated standard. Cu concentrations of two points are beyond the agricultural monitoring standard (IL99-YL-S52:154 mg/kg；IL99-YL-S54 mg/kg). To Zn concentration, there are three points beyond the agricultural monitoring standard (IL99-YL-S51:281 mg/kg；IL99-YL-S53:552 mg/kg；IL99-YL-S54:567 mg/kg). To Pb concentration, there is one point beyond the agricultural monitoring standard (IL99-YL-S54:394 mg/kg). To Hg concentration, there is one point beyond the agricultural monitoring standard (IL99-YL-S53:3.27 mg/kg). The team supposed the land site is polluted by heavy metals.
To Lea-Zou industrial park, the concentrations of eight heavy metals are lower than monitoring standards, so the team suppose there are no the eight heavy metal pollutions.
There are three As concentrations beyond monitoring standard at Loong-Do 3 discharge point (IL99-SA-S65:34.4 mg/kg，IL99-SA-S67:40.3 mg/kg， IL99-SA-S68:41.8 mg/kg). Owing to the non-homogeneous soil, the team supposes soil have As, then affects the analysis results.
To yeong-Chun 155-3 land site, Zn concentration is beyond the regulated standard in one point, the team suggest further investigation to ascertain the pollution.
Owing to the budget, the team chose 12 parks and 30 sampling points to investigate. Results show there are no obvious pollution, only Ton-Chen township #1 park has heavy metal concentrations beyond the monitoring standards.
5. Design and Renewal of Soil and Underground Water Website
Related websites are finished in accordance with EPA requirements. Statistic data are completed from 2010. Feb to 2010. Dec.