The parking garage was flooded with 50,000 gallons of flood water from intense downpours.  The city sewage system failed and back-flowed raw sewage into the rising flood waters, which subsequently filled the garage.  When the waters receded, a test for coliform bacteria confirmed their presence in the flood waters.  Remediation consisted of power washing the entire 25,000 square feet of garage surface with a green antimicrobial product that does not affect the pH of reclaimed city water.  Following pressure treatment, the entire garage was fogged with reactive hydroxyl technology. Click on the thumbnail below to watch the video.