Acute toxicity looks at lethal effects following oral, dermal or inhalation exposure. It is split into five categories of severity where Category 1 requires the least amount of exposure to be lethal and Category 5 requires the most exposure to be lethal. The table below shows the upper limits for each category.
Lets start with the stuff you'll need: Gas Grill Cooking tri tip roast on a gas grill is simple if the grill has at least two burners, and can maintain 350-375Â°F/177-191Â°C. Use an oven thermometer to assure an accurate reading. The one included on the grill is not accurate enough for good barbecue results.
1 In a large, non-reactive bowl, blend the soy sauce, olive oil, water, garlic, and pepper. Place the beef tri tip in the marinade. Cover, and marinate in the refrigerator at least 4 hours.  Preheat an outdoor grill for high heat, and lightly oil grate.