文档介绍：河流污染治理项目环评
of rural drinking water sources, protection of drinking water sources in rural areas by the end of t境质量背景状况和主要环境问题。
(2) 通过详细的工程分析，明确建设项目的主要环境影响，筛选对环境造成影响的因子，尤其关注建设项目产生的特征污染因子。并通过类比调查、物料衡算，核算污染源源强，预测项目建设对环境影响的程度与范围。
(3) 根据建设项目的排污特点，通过类比调查与分析研究，论证污染防治措施的可行性，论述纳污场地的环境可行性与技术方面的可操作性，并进行环境经济损益分析。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities- 20 - 0991-3857017**环境保护技术咨询中心
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities - 5 -
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
通过对建设项目环境影响的评价，使项目建成产生的经济和社会效益得到充分的发挥，对环境产生的负面影响减至最小，实现环境、社会和经济协调发展的目的。
评价标准
环境质量标准
(1) 空气环境质量标准：SO2、NO2、TSP、执行《环境空气质量标准》(GB3095-1996含修改单)的二级标准，其标准值见表1-4-1。
表1-4-1 环境空气质量评价标准
序号
污染物
浓度限值(mg/m3)
标准来源
日平均
1小时平均
年平均值
1
二氧化硫(SO2)

GB3095-1996(二级)
2
总悬浮颗粒物(TSP)

3
二氧化氮(NO2)

(2) 地表水环境质量标准
执行《地表水环境质量标准》(GB3838-2002)中Ⅲ类、IV类标准。标准值见表1-4-2。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities- 20 - 0991-3857017**环境保护技术咨询中心
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities - 5 -
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimita