Here is a news report on a recent filing by West Virginia National Guard soldiers against KBR for injury from hexavalent chromium while serving in Iraq. The West Virginia Guard soldiers were exposed to sodium dichromate at the same facility as Indiana and Oregon Guard soldiers. Sodium dichromate contains hexavalent chromium, a toxic chemical that can cause cancer.
According to the linked news report, at least 125 West Virginia soldiers may have been exposed. According to the same source, KBR “‘did not knowingly harm the troops.’”