[note: Koch signed late Monday afternoon so this story is good for Tuesday m.e.] Officials for the Koch Refining Company will take their request for a new, flexible air quality permit before the Minnesota Pollution Control Agency citizens board today, for a second time. The permit could allow the company to expand operations at its Rosemount Refinery, at a time when it's under increasing fire for widespread contamination in Minnesota and in other states. Minnesota Public Radio's Mary Losure reports. Koch Refining Company's request for a new air quality permit first went to the Minnesota Pollution Control Agency citizen