Stomach fat is simply fat stored on your stomach. What I mean is that everbody's body is different and some people store fat in areas where others don't store as much. My body stores most of its fat around the stomach as well.
As far as the exercising you mentioned, let me point out two things:
The 1.5 mile in 9 minutes each day… It would probably be better to do a longer cardio workout (less intense, it could be jogging biking, dancing…) 3-4 days a week to burn more calories.
You say you go to the gym, but going to the gym doesn't burn anything (well, except gas). It's about what you do at the gym. What do you do at the gym?
What are you eating? This is EXTREMELY IMPORTANT. If you are running and going to the gym and then eating a burger and fries, a big burrito, candy bars, twinkies, etc… You're not going to get anywhere.
Eat well (eat GOOD carbohydrates, GOOD sugars, and protein).
Examples of good carbs:
Spanish/brown Rice, pinto beans, potatoes, veggies, WHOLE WHEAT bread (DO NOT EAT WHITE BREAD, WHITE RICE, WHITE grains), etc…
Bananas, raisins, apples, other fruit.
STAY AWAY from processed foods (almost everything you find in a vending machine) and foods with high fructose corn sugar or partially hydrogenated anything (read the INGREDIENTS).
Also, realize that much of what you eat is not needed. Try toast without butter. Try a sandwich without mayo. Try cereal without other additives. You'll find that many things don't taste as bad as you'd think and while these are small steps, they add up, trust me.
A good tip is to eat very slow. What will happen is you will realize that you will feel full before you even finish your food. This is because you are full and once you feel this, just save the rest for later. A common problem that causes extra fat to be stored is when you eat too much at once. If you eat a 1500 calorie burrito and then don't eat the rest of the day, this is still not a good idea.
That's because unless you use 1500 calories right then and there (nobody does that), your body will store some as fat. Then you'll get hungry later anyway. So it would be better for the body to eat 1/6 of this burrito every few hours so that it gets dispersed.
Get into the habbit of reading labels for products and avoid products will too much salt, too much sugar, too many calories, and too much fat. Try to cut down your meals to 200-400 calories and eat more often rather than having a larger meal 3 times a day.
These are all tips that I thought of just now. Don't feel overwhelmed and if you want you can just try a couple. I hope I helped.