Food Safety Report: Costco Wholesale, West Wabash Avenue, Eureka, CA, USA 2 years ago • details 29 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps Suspected source: Costco sweet kale salad Onset: 4 to 12 hours Duration: 4 to 12 hours Sick: Me