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首页> 外文会议>Western Dredging Association Twenty-Second Technical Conference, Thirty-Fourth Texas Aamp;M Dredging Seminar, and Special Permanent International Association of Navigational Congresses Session, Jun 12-15, 2002, Denver, Colorado >ALAMEDA CORRIDOR TRANSPORTATION AUTHORITY OFFSET DREDGING PROJECT, PORT OF LOS ANGELES (FISH HARBOR), CALIFORNIA
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ALAMEDA CORRIDOR TRANSPORTATION AUTHORITY OFFSET DREDGING PROJECT, PORT OF LOS ANGELES (FISH HARBOR), CALIFORNIA

机译：加利福尼亚洛杉矶港（鱼港）的阿拉米达走廊运输当局偏移补偿项目

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摘要

The Alameda Corridor Transportation Authority (ACTA) embarked on a comprehensive project to provide offset (mitigation) for the discharge of naturally occurring groundwaters containing low levels of metal contaminants into a local flood control channel (Dominguez Channel) near the Port of Los Angeles. The dewatering was required in order to construct a 10-mile segment of the corridor that was below grade and into the groundwater table. Because the Dominguez Channel is listed as impaired (under Section 303(d) of the Clean Water Act) for copper, lead, and zinc metals, the California Regional Water Quality Control Board and the U.S. Environmental Protection Agency made a requirement in the discharge permit that a mitigation project must be completed that effectively removes 1.5 times the mass of metals discharged from the watershed. After reviewing several options it was determined that the most agreeable mitigation would entail removing a specific amount of sediment from a location within the Port of Los Angeles that contained elevated levels of copper, lead, and zinc metals and then transporting the sediment to a Class II landfill. The return water also required special handling and was collected and transported to a wastewater recycling facility. This paper addresses the planning and negotiation process through the permitting process, contract procurement, execution, and results of the operation. Specifics include the determination of metals discharged and reclaimed, type of dredging and handling, specialized treatment of the sediment and wastewater during and after removal, sampling and monitoring, and overall cost analysis.
机译：阿拉米达走廊运输管理局（ACTA）开展了一项综合项目，为向洛杉矶港附近的当地防洪渠（多明格斯渠）排放含少量金属污染物的天然地下水提供补偿（缓解）措施。为了将走廊的一段10英里以下的路段修建在地表以下并进入地下水位，需要进行脱水。由于Dominguez渠道被列为铜，铅和锌金属的受损（根据《清洁水法》第303（d）条），因此加利福尼亚州区域水质控制委员会和美国环境保护局对排放许可证提出了要求必须完成缓解项目，以有效清除流域排放的金属的1.5倍。在审查了几种方案后，确定最令人满意的缓解措施是从洛杉矶港内某个位置清除一定量的沉积物，该沉积物中铜，铅和锌金属的含量较高，然后将其运送到II级垃圾填埋场。回水也需要特殊处理，并被收集并输送到废水回收设施。本文通过许可过程，合同采购，执行和运营结果来讨论计划和谈判过程。具体内容包括确定排放和回收的金属，疏and和处理的类型，去除期间和去除之后的沉淀物和废水的专门处理，采样和监控以及总体成本分析。

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