Combine water with salt, ground black pepper, oregano, basil, onion salt, parsley, garlic powder, bay leaf, and salad dressing mix in a saucepan. Stir well, and bring to a boil.
Place roast in slow cooker, and pour salad dressing mixture over the meat.
Cover, and cook on Low for 10 to 12 hours, or on High for 4 to 5 hours. When done, remove bay leaf, and shred meat with a fork.
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