A 68-year-old woman presents to the ER with severe generalized abdominal pain, following a 6-day history of severe constipation. On examination, her heart rate is 110 bpm and blood pressure is 98/60 mmHg. The abdomen is distended and rigid. Abdominal x-ray reveals large bowel obstruction. At laparotomy, there is a perforated, obstructive sigmoid neoplasm with fecal contamination. What would be the most appropriate intraoperative option?