■ Thomas D. Elias / Contributed It’s pretty clear to anyone who’s watched firefighters try to control the massive blazes bedeviling California over the last two years that they have the right stuff. But questions have arisen over whether they are using all the right stuff. The maker of a rival firefighting substance has cried foul over an exclusive contract between suppliers of Phos-Chek fire retardant fluids and the state Department of Forestry and Fire Protection, known as CalFire. That pact sees the state use no long-term fire retardant other than Phos-Chek, a highly visible pinkish-red fluid dropped from air tankers onto fast-moving flames. Phos-Chek, produced by the St. Louis-based ICL
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