S309线沙坪至龚嘴大桥段升级改造工程环境影响报告.pdf

国 环 评 证 乙字第3506 号 S309线沙坪至龚嘴大桥段升级改造工程 环境影响报告书 建 设 单 位： 峨边彝族自治县交通投资有限公司 编 制 单 位： 西藏国策环保科技股份有限公司 2018 1 年 月 目 录 前 言··································································································1 第1 章 总论·························································································3 1.1 工程建设的必要性··············································································3 1.2 评价目的与原则·················································································4 1.3 编制依据··························································································5 1.4 评价因子与评价标准···········································································9 1.5 评价等级、评价范围和评价时段··························································14 1.6 评价内容及重点··············································································· 15 1.7 环境保护目标及污染控制目标·····························································17 1.8 工作程序·························································································23 第2 章 工程概况·················································································24 2.1 工程线路走向及主要控制点································································24 2.2 推荐方案建设规模············································································26 2.4 主要技术标准···················································································43 2.5 交通量预测······················································································44 2.6 工程占地及拆迁···············································································45 2.7 临时工程·························································································46 2.8 土石方工程······················································································52 2.9 施工组织及施工方案···········