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首页> 外文期刊>International Journal of Soil, Sediment and Water >PCB and Heavy Metal Soil Remediation, Former Boat Yard, South Dartmouth, Massachusetts
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PCB and Heavy Metal Soil Remediation, Former Boat Yard, South Dartmouth, Massachusetts

机译：多氯联苯和重金属土壤修复，前船坞，马萨诸塞州南达特茅斯

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PCB and Heavy Metal Soil Remediation, Former Boat Yard, South Dartmouth Massachusetts. Michael E. Martin & Marc J. Richards, Tighe & Bond Consulting Engineers. Heavy metals have been added to marine paint for more than 100-years to protect boats from biological, chemical and physical degradation. Polychlorinated biphenyls (PCBs) were added to marine paint starting in the 1940’s to give the paint better adhesive properties and to provide anti-corrosion protection from moisture, chemicals and flames (approximately 2% composition of paint). The nature of the contamination at this project Site was primarily heavy metals and PCBs in soil and heavy metals in sediment. The source of soil contamination was from marine paint chips from repainting and maintenance activities conducted at the boatyard since the early 1900s. The source of sediment impacts is believed to be stormwater discharges to the Apponagansett Bay from routine boatyard activities, including power washing of boats. The overall goal of the soil remediation was to reduce PCB and metals exposure point concentrations at the Site to levels that do not pose a risk to human health and the environment. The work had to be conducted during the winter months, so the remedial and construction activities did not interfere with daily marina operations. This paper describes the remediation activities performed at the Site to achieve the overall remediation goal, which included: the chemical treatment of soil to stabilize the soil (bind leachable lead), excavation and off-site disposal of impacted soils and the construction of a multi-layer asphalt cap containment system to restrict access to residual PCBs and heavy metals. Additionally, this paper will discuss the applicable environmental regulations governing the remediation. As a measure to minimize the potential for future contamination, this project also included the construction of a boat wash/washwater collection system to prevent future paint chip debris from entering the environment.
机译：多氯联苯和重金属土壤修复，马萨诸塞州南达特茅斯市前船坞。 Tighe＆Bond咨询工程师，Michael E. Martin和Marc J. Richards。重金属已添加到船用涂料中已有100多年的历史了，以保护船舶免受生物，化学和物理降解。从1940年代开始，将多氯联苯（PCB）添加到船用涂料中，以赋予涂料更好的粘合性能，并提供防潮，防化学腐蚀和防火焰腐蚀（约占涂料成分的2％）。该项目现场的污染性质主要是土壤中的重金属和多氯联苯以及沉积物中的重金属。自1900年代初以来，土壤污染的来源来自船坞进行的重涂和维护活动中产生的海洋油漆碎片。沉积物影响的来源被认为是通过常规的船坞活动（包括用力洗船）向Apponagansett湾排放的雨水。土壤修复的总体目标是将现场的PCB和金属暴露点浓度降低到不会危害人类健康和环境的水平。该工作必须在冬季进行，因此补救和建筑活动不会干扰日常的码头运营。本文介绍了为实现整体修复目标而在现场进行的修复活动，其中包括：化学处理土壤以稳定土壤（可浸出的铅），受影响的土壤的开挖和异地处置以及多处施工层的沥青瓶盖密封系统可限制接触残留的PCB和重金属。此外，本文还将讨论适用于治理的环境法规。为了最大程度地减少将来污染的可能性，该项目还包括建造洗船/洗水收集系统，以防止将来的油漆碎片碎片进入环境。

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