DIANE SAWYER (ABC NEWS)(OC): We are back on the case tonight, our ABC News investigation of the filler called pink slime in 70% of the ground beef sold at supermarkets in this country. You have flooded us with e-mails about your attempts to get direct answers from your supermarkets, which ones allow it, which ones don't and what does the beef industry have to say? ABC senior national correspondent, Jim Avila, went to the top to get answers.
JOSHUA APPLESTONE: This is ours. This is fresh.
JIM AVILA (ABC NEWS)(VO): Organic butchers, like Brooklyn's Joshua Applestone, have a strict definition of 100% fresh ground beef.
JOSHUA APPLESTONE (BUTCHER): It should be whole muscle, ground, made into a patty and put into a freezer.
JIM AVILA: Applestone says he wouldn't sell or serve his family hamburger mixed with lean finely-textured beef, commonly known as pink slime, something that's in 70% of American ground beef. This picture of the material was sent to ABC News by its maker today. That's the final product that starts with low-grade beef trimmings, spun in machines and spritzed with ammonia.
JOSHUA APPLESTONE : It's an unnatural process.
JIM AVILA (ABC NEWS)(VO): But most Americans get their ground beef at supermarkets. And our viewers want to know if pink slime lurks in the beef sold here.
AMBER NEELEY (CONSUMER): What 30% of meat doesn't contain pink slime?
KATRINA VANSLYKE : Which retail chains carry it?
JIM AVILA: So, for the second day in a row, we asked America's top ten grocers and Whole Foods exactly that.
JIM AVILA: These companies either didn't respond or had no comment. The owners of Stop & Shop and Giant say they use the product. Safeway would only say the government says the filler is safe. But they're reviewing their own policy.
JIM AVILA (ABC NEWS)(VO): These stores say their beef contains no pink slime at all.
SPOKESPERSON (COSTCO): Is that additive up to our standards? And the answer is no. I personally don't know how I could explain to a Costco member that we put trim that's been treated with ammonia in their ground beef.
JIM AVILA: Critics say pink slime is more like gelatin than beef and less nutritious. But BPI, its inventor and primary manufacturer, tells ABC News in a letter from its lawyer today, it is USDA-approved beef and is nutritious. And the American Meat Institute insists pink slime is not an additive, so no label is necessary.
JIM AVILA : What's being hidden here?
JANET RILEY: What are you asking me to put on the label? It's beef. It's on the label. It's a beef product. It says beef. This is beef. So, we are declaring it. It's beef.
DIANE SAWYER: What about the government in all of this, Jim? USDA?
JIM AVILA : We've been asking the USDA since Wednesday for an interview on camera. They have said no. And they're not changing their policy. They've given us no indication they're changing their policy, that this can continue to be appearing in America's hamburgers without a label on it.
DIANE SAWYER: Wait a minute, they won't even talk about it?
JIM AVILA: Not even - on the record, no.
DIANE SAWYER (ABC NEWS)(OC): You keep calling?
JIM AVILA (ABC NEWS)(OC): We are calling.
DIANE SAWYER : All right, keep calling all next week. I'm going to be asking every day. And thank you so much, Jim.