9055 is this grease/special exhaust detail approved before cover fourth-year grease duct access red 4 is this grease/special exhaust detail approved before cover or modification? this access/slope/clearance/detail affects special exhaust. do you want it held for approved direction before anyone cuts, seals, or covers it? fourth-year grease duct access: is this grease/special exhaust detail approved before cover?. i have the location and what i checked. who should verify before i keep going?