Word: halff
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Dates: during 2000-2009
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...chart the hazards, environmental consultants Halff Associates and HBC Engineering/Terracon pored over Sanborn Fire Insurance maps from the late 1800s and old city directories to locate chemical warehouses, junkyards and gas stations. Engineers walked the property with equipment that detected heavy-metal deposits, then bored some 600 holes and collected more than 5,000 soil and water samples. A color-coded map showed the worst problems: pink for lead and arsenic, green for petroleum and purple for benzo(a)pyrene, a carcinogenic by-product of garbage incineration...