对“有毒重金属”实施2种总量控制监管方式的利害分析

Effect Analysis on the Two Total Load Control Methods for Poisonous Heavy Metals

首先,必须明确认定:对第一类污染物实施《源头总量控制》是污控执法和促进经济结构改革的保证条件.这种监管方式自2008年《第一次全国污染源普查工业污染源产排污系数手册》公布以来,更具有其切实实施的可行性.《源头总量控制》与《水环境总量控制》两种监管方式既是各自独立、缺一不可,又是相互依赖和相互补充的关系,目前一些地方的规划管理者模糊和混淆了两类污染物和两种监管的内容和方式,笼统以《水环境总量控制》来监管所有污染物,丢弃了《源头总量控制》,使本应严加管理的饮用水水源地丧失了控制第一类污染物的能力.我国《地面水环境质量标准》(GB 3838-88)中第一类污染物的水质指标与我国实际的水环境背景值有很大差距,存在着"放宽允排量"和"价态转化引发危害"的问题;以一个10 t电解铅的企业为例,证明两种监管方式的铅允排量相差甚大.总之,把第一类污染物与第二类污染物统一实施《水环境容量总量控制》将带来众多的危害,应当严格实施《源头总量控制》与《水环境总量控制》相结合的监管方式.

Firstly it should be made clear that implementation of source total load control for the first type of pollutants is necessary for environmental pollution control legislation and economic structure regulation.This kind of surveillance method has been more practical to be implemented since the Manual of the Industry Discharge Coefficient of First National Pollution Sources Investigation was published.The source total load control and water environment total load control are independent of each other and none of them is redundant,on the other side they can be complementary to each other.In the present,some local planning managers are blurring and confusing the contents and styles of the two surveillance methods.They just use the water total load control to manage all the pollutants,and source total load control is discarded,which results in the loss of control for the first type of pollutants especially for the drinking water source surveillance.There is a big difference between the water quality standards and the water environmental background concentration values for the first type of pollutants in the Environmental quality standard for surface water（GB 3838-88）,which means that there are problems such as ＂relaxing the pollutant discharge permit＂ and ＂risk induced by valence state change＂.Taking an enterprise with 10t electrolytic lead production capacity as an example,there is a big difference between the allowable lead discharged loads by the two total load surveillance methods.In summary,it will bring a lot of harmful effects if the water total load control is implemented for the two types of pollutants,so the source total load control and water environmental total load control should be implemented strictly at the same time.