Create a basic brine by bringing water, salt, and sugar to a boil in a large pot. Stir to dissolve. Remove from heat and add herbs and garlic. Let brine sit at room temperature until it is cool to the touch, then place pot in refrigerator to cool completely. Add pork. Refrigerate for two to three hours. (Each tenderloin should brine for two hours per pound). Remove the pork from the brine and rinse lightly. Dry with a clean towel and grill over medium heat to desired doneness.
