Marathon to fund projects in southwest Detroit to settle refinery emissions violations The state Department of Environment, Great Lakes, and Energy on Wednesday released the final terms of its agreement with the southwest Detroit refinery that includes an anticipated investment of $539,000 into environmental safeguards for the neighborhood in the 48217 ZIP code. The agreement, signed Jan. 22, lays out costs that exceed what was an anticipated $360,000 investment in a tentative deal from August. The order was effective on Monday. The majority of the supplemental funding — or about $500,000 — will go toward installing an air filtration system at Mark Twain School for Scholars in southwest Detroit. The school is located about two miles from the refinery in the community that ranks among the state's most polluted.