Vapor Intrusion Facility Boundary Polygons (Approximate Extent of Contamination), South Bay CA, 2014, US EPA Region 9

Theses polygons represent the approximate extent of contamination for Vapor Intrusion facilities. Polygons for non-Federal Facility sites were updated in January,...这些多边形要素表征了蒸气侵入（Vapor Intrusion）相关设施的近似污染范围。其中，非联邦机构场地对应的多边形要素已于1月完成更新……