Firefighters tried to put the fire out using dry chemical , over 1,000 lbs of Purple-K . This did not work, so they used high flow water to cool it. Then covered it with 28 tons of Portland cement. Batteries ranged in size from cell phone to a little bigger than a car battery. Business owner said he was planning to go into the solar power business by the end of the year.
An ongoing report by the US Environmental Protection Agency , including air sample monitoring https://response.epa.gov/site/site_profile.aspx?site_id=15259