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首页> 外文会议>CDS Report no.377; Western Dredging Association 24th Technical Conference and 36th Texas Aamp;M Dredging Seminar; 20040706-09; Orlando,FL(US) >LONG TERM MONITORING RESULTS OF AN AQUATIC CAPPING/CAD SITE PROJECT IN LONG BEACH, CALIFORNIA
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LONG TERM MONITORING RESULTS OF AN AQUATIC CAPPING/CAD SITE PROJECT IN LONG BEACH, CALIFORNIA

机译：加利福尼亚州长滩市水生盖层/ CAD站点项目的长期监测结果

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This paper presents the results of a long-term monitoring project to test the effectiveness of an Aquatic Capping Pilot Project conducted by the U.S. Army Corps of Engineers (Corps) in Long Beach, California. The project was conducted in coordination with the Los Angeles Region Contaminated Sediments Task Force (CSTF), a multi-agency group established by the State of California in 1998 to develop a long-term management strategy for dredging and disposal of contaminated sediments from coastal waters in Los Angeles County. The strategy's goal is to identify environmentally preferable, practicable disposal alternatives, promote multi-use disposal facilities and beneficial re-use, and support efforts for watershed management to control contaminated sediments at the source. Aquatic Capping was identified as one of four pilot and/or bench-scale studies for local testing. All four studies were subsequently funded and managed by the Los Angeles District of the U.S. Army Corps of Engineers. The aquatic capping project involved mechanically dredging 100,000 cubic meters of contaminated sediment from the Los Angeles River Estuary (LARE) and placing the material in the North Energy Island Borrow Pit (NEIBP) - a historic borrow pit used to construct a series of near shore islands for housing oil and gas operations in the Long Beach area. After the material was placed, 68,000 cubic meters of clean material was mechanically dredged from the South Energy Island Borrow Pit (SEIBP) and placed as cap material over the contaminated sediment. The material used for the cap was previously dredged from the Port of Long Beach approach channel and was stored in the SEIBP for future re-use purposes. Extensive field monitoring occurred prior to, during and immediately following project construction. A long-term monitoring program was then developed by Corps staff and CSTF participants, to be implemented on an annual basis for a period of three years. Components of the monitoring program included physical and chemical analyses of core samples in the cap, benthic analyses to monitor for re-colonization, and bathymetry to monitor for settlement and/or erosion. This paper presents the results of the first two years of field monitoring, proposed monitoring program of the third year, and discusses implications for use of aquatic capping as a regional disposal procedure.
机译：本文介绍了一项长期监测项目的结果，以测试美国陆军工程兵团（Corps）在加利福尼亚州长滩进行的水上上限试验项目的有效性。该项目是与洛杉矶地区污染沉积物工作组（CSTF）协调进行的，CSTF是加利福尼亚州于1998年成立的一个跨机构小组，旨在制定长期管理战略，以疏and和处置沿海水域的污染沉积物。在洛杉矶县。该战略的目标是确定对环境有利的，可行的处置替代方案，促进多用途处置设施和有益的再利用，并支持流域管理以控制源头受污染的沉积物。水生上限被确定为本地测试的四个试点和/或基准规模研究之一。随后，这四项研究均由美国陆军工程兵团洛杉矶地区资助和管理。该水上封盖项目涉及从洛杉矶河口（LARE）机械挖泥100,000立方米的受污染沉积物，并将该材料放置在北部能源岛借坑（NEIBP）中-一种用于建造一系列近岸岛屿的历史性借坑在长滩地区用于住房石油和天然气业务。放置材料后，从南能源岛借款坑（SEIBP）机械疏6了68,000立方米的清洁材料，并将其作为覆盖材料放置在受污染的沉积物上。瓶盖所用的材料先前是从长滩港进港通道疏dr的，并存储在SEIBP中，以备将来重复使用。在项目建设之前，之中和之后立即进行了广泛的现场监控。然后，兵团工作人员和CSTF参与者制定了一项长期监控计划，并将在三年内每年实施一次。监测计划的组成部分包括对瓶盖中核心样品的物理和化学分析，监测重新定殖的底栖生物分析以及监测沉降和/或侵蚀的测深法。本文介绍了前两年实地监测的结果，拟议的第三年监测计划，并讨论了将水生上限用作区域处置程序的意义。

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