Investigation and vulnerability assessment for phreatic groundwater pollution are conducted using the DRASTIC, and are classified 4 grades with good, middle, common and worse.

• 采用DRASTIC评价方法，对区内地下潜水的污染状况进行了调查评价，并将其防污性能划分为4个等级区：防污性能较好、防污性能中等、防污性能一般、防污性能较差。