Jan. 25, 2012 How a rain garden cleans industrial pollution

"...Totem Ocean Trailer Express (TOTE), a shipping company that hauls cargo between Tacoma and Alaska, couldn’t meet some of the tight pollutant discharge requirements in its Washington State industrial stormwater permit. With all that galvanized metal (from shipping containers and the metal sides of buildings), it’s pretty logical that there might be something not so good running off the parking areas, into the storm drains, and straight into the Bay. In this case, that something turned out to be zinc, which can be extremely hazardous to marine life. The pollution wasn’t easily visible; reportedly, the storm drain regularly emptied clear water into the Bay. But it was insidious, a silent toxin." Read More