“Modified” hydrofluoric acid (MHF) is a dangerous industrial chemical used in massive quantities in only two California refineries, Torrance and Valero, Wilmington. If released, it forms a ground-hugging cloud that can drift for miles, causing death and injury. The refineries’ other mitigation measures, like water sprays and barriers, are also ineffective. Mass casualties can result from an MHF release — wind direction determines who dies.

Results of 2015 explosion that nearly released 50,000 lbs of MHF, which could have killed or injured tens of thousands, according to the U.S. Chemical Safety Board


For decades, the South Bay has battled the refineries’ all-too-successful campaign to keep using MHF rather than converting to a much safer process, such as is used at Chevron in El Segundo and the other California refineries. Following the massive Torrance refinery explosion in February 2015, which nearly released 50,000 lb of MHF, investigations by TRAA and the U.S. Chemical Safety Board uncovered the true threat MHF poses. Now, the South Coast Air Quality Management District (SCAQMD) is considering Rule 1410 to require MHF/HF replacement with a safer alternative at both refineries. But industry is fighting back with well-financed campaigns.


Email the SCAQMD Board members demanding a strong Rule 1410 to Phase-Out MHF in 4 years. We’ve made it easy–just click here to find out how.

May 18, 2019

Join us on Sunday, May 19 at 5 pm at the Torrance Sizzler!

We are having a “mini teach-in” for all of you who have been getting mailings of the newsletter etc. over the last 4 years. A lot has been happening in the battle against them HF. Some good some not so good.Bring your questions and will give you lots of “insider” information – bring a neighbor who may be worried about the refinery closing, or a concerned parent, whose child attends a school in the path of MHF – whatever the questions or comments may be, we want to hear them!
For more information, please click here.

April 5, 2019

The Los Angeles County Department of Health has sent a letter to the South Coast Air Quality Management District urging the phase out of MHF as soon as possible. Angelo Bellomo, the county deputy director for health protection stated in a letter that a large scale release of MHF “would have potentially catastrophic impacts on surrounding communities.” For more information, read the Daily Breeze article by clicking here.