On Monday, 15 area Safeway stores began selling the first pork in the nation to be tested and certified free of trichinosis-causing parasites. Pork, bacon and sausage products packed by Ludee Packing in Clinton, N.C., and tested by Idetek, a California-based biotechnology company, bear the labels "Certified Pork" and the explanation "Trichina Tested."

The U.S. Department of Agriculture, which is supervising the tests, still recommends that consumers thoroughly cook pork, since like all raw meat and poultry, it can carry other disease-causing bacteria.

The trichinia-free products, most of which will sell for the same prices as Safeway's comparable pork cuts, are being sold in the following area stores: Iverson St., Temple Hills; East Swancreek Rd., Fort Washington; Indian Head Highway, Oxon Hill; Milwaukee Place, SE; South Royal St., Alexandria; Ft. Hunt Rd., Alexandria; Naylor Rd. SE; Pennsylvania Ave. SE; Livingston Rd., Oxon Hill; Richmond Hwy., Alexandria; Telegraph Rd., Alexandria; Belleview Blvd., Alexandria; Bryans Road Shopping Center,. Bryans Rd; Piscataway Rd., Clinton; Barnabas Rd., Temple Hills.

Another area first: The Safeway in Greenway Shopping Center on Greenbelt Road in Greenbelt is test marketing a line of organically grown nuts, grains, legumes and pasta in its bulk foods section. The products come from Organic Farms, a Beltsville wholesale company.