Contents
I. Background 3
1.1 Incident Overview 3
1.2 Water Contamination Incident 3
II. Interpretation of the Reason of the Water Contamination Incident 6
2.1 Direct Reason 6
2.2 Indirect Reason 7
III. Methodology and Purpose of the Research 10
IV. Research Result and Analyzation 10
4.1   Questionnaire and Results 10
4.2   Analysis of Research Results 19
V. Questioning of Related System 20
5.1   Main Body for Water Test 20
5.2   Emergency Treatment of Contamination Incident 22
5.3   Establishment of Third Party Testing Mechainsm 23
5.4   Effectively Avoid Tap Water Contamination 24
5.5   About Water Privatization 24
References 28

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Investigation Report on the Incident of Excessive Levels of Benzene in Tap Water in Certain Areas of Lanzhou on April 11th