环保署授出1,010万美元清理合同：Superior Bay污染沉积物治理进入3,400万美元项目收官阶段
美国环境保护署（环保署 EPA）10月22日宣布，环保署、威斯康星州自然资源部（DNR）与 Superior Water, Light and Power 公司（SWL&P）已授出一份1,010万美元的合同，清理威斯康星州 Superior Bay 内一处占地12英亩、名为 C Street Slip 的水域污染沉积物。该项目是总额3,400万美元项目协议的收官阶段，协议目标是清除 St. Louis River 重点治理区（Area of Concern）内的污染沉积物并控制污染源。
环保署第五区负责人 Anne Vogel 表示，这一节点是联邦、州、地方与企业伙伴多年协作的结果，清除这一长期污染源将改善环境质量、支持休闲活动，并惠及这一重要的五大湖资源。威斯康星州自然资源部部长 Karen Hyun 表示，合同授出体现了三方多年合作建立的信任与伙伴关系。SWL&P 总裁 Rob Sandstrom 说，该项目源于125年前一家燃气厂留下的废物，三方合作使环保署得以把该水域的全部污染源清除。
环保署介绍，St. Louis River 的历史工业活动与废水排放使河底沉积物受到汞、二噁英、多氯联苯（PCBs）、多环芳烃（PAHs）等有毒物质污染。C Street Slip 工程预计2027年开工，施工方将清除约23,000立方码汞与多环芳烃含量较高的污染沉积物，沉积物经脱水后运往获准的处置设施，清除完成后将在项目区铺设一层薄沙覆盖层。
St. Louis River 于1987年依据《五大湖水质协议》被列为重点治理区，其流域面积3,634平方英里、治理区范围1,020平方英里，是全美第二大的重点治理区；全美目前还剩23个重点治理区。环保署与伙伴方迄今已在该治理区清除逾190万立方码污染沉积物、恢复逾1,000英亩重要栖息地；摘帽所需的19个沉积物治理项目已完成13个，19个栖息地恢复项目已完成17个。相关工作由「五大湖修复倡议」与《五大湖遗产法》项目协议下的非联邦出资共同支持。
EPA Awards $10.1 Million Contract as $34 Million Superior Bay Sediment Cleanup Enters Final Phase
The U.S. Environmental Protection Agency (EPA) announced on October 22 that EPA, the Wisconsin Department of Natural Resources (DNR), and Superior Water, Light and Power Co. (SWL&P) have awarded a $10.1 million contract to clean up contaminated sediment in the C Street Slip, a 12-acre slip in Superior Bay, Wisconsin. The project is the final phase of a $34 million project agreement to remove contaminated sediment and control sources of contamination in the St. Louis River Area of Concern.
EPA Region 5 Administrator Anne Vogel said the milestone reflects years of commitment and collaboration among federal, state, local, and private partners, and that removing the long-standing source of pollution will improve environmental quality, support recreation, and strengthen an important Great Lakes resource. Wisconsin DNR Secretary Karen Hyun said the contract award reflects the trust and partnership built among SWL&P, EPA, and the state over many years. SWL&P President Rob Sandstrom said the effort began with manufactured gas plant waste left from 125 years ago, and that the partnership will allow EPA to remove all sources of contamination from the slip.
According to EPA, historical industrial use of the St. Louis River, along with wastewater discharges, contaminated the river's sediment with mercury, dioxins, polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), and other toxins. Work on the C Street Slip project is expected to begin in 2027. Crews will remove approximately 23,000 cubic yards of contaminated sediment containing high levels of mercury and PAHs; the sediment will be dried and transported for disposal at an approved facility, and a thin sand cover layer will be placed in the project area after removal.
The St. Louis River was designated an Area of Concern under the Great Lakes Water Quality Agreement in 1987. It drains a 3,634-square-mile watershed and encompasses a 1,020-square-mile area, making it the second-largest Area of Concern in the United States; 23 Areas of Concern remain nationwide. EPA and its partners have so far remediated more than 1.9 million cubic yards of contaminated sediment and restored more than 1,000 acres of important habitat in the St. Louis River Area of Concern, completing 13 of the 19 sediment remediation projects and 17 of the 19 habitat restoration projects needed to delist the area. The work is funded by the Great Lakes Restoration Initiative and non-federal contributions through project agreements under the Great Lakes Legacy Act.
来源：GSM·美国（原文链接）
图片来源：图：Superior Bay 内 C Street Slip 项目区俯瞰图（环保署 EPA 官方发布，公共领域）
