With the exception of vendor supplied items, such as greeting cards and soda, these distribution centers ship items directly to Target stores. Also, unlike Walmart, Target's grocery selection does not come from their own distribution centers, but from the companies with whom Target has partnered. The retail chain's first distribution center opened in Fridley, Minnesota, in 1969. It included a computerized distribution system and was known as the Northern Distribution Center. During this time, the chain consisted of seventeen stores after having expanded into Oklahoma and Texas. On August 9, 2004, Target announced to their suppliers that they were going to perform a trial on the effects of radio-frequency identification on the efficiency of supply chain management in the Dallas–Fort Worth metroplex. This trial involved one Target distribution center and ten nearby Target stores. Here, RFID tags were placed on the bar codes of pallets and cartons to track the goods from the suppliers to the distribution center, and from the distribution center to the stores. As of 2009, RFID had been phased out of the Dallas–Fort Worth stores. Target opened three new distribution centers in 2006 (Rialto, California, DeKalb, Illinois) and one in 2009 (Newton, North Carolina) to support the growth of its stores. On January 27, 2009, Target announced the closing of its distribution center in Maumelle, Arkansas, the second-oldest in the company. The reason cited was the need to ensure that Target remains competitive in the long-term. In June 2009 Target opened a new distribution center to supply more than 60 stores in three states. SuperTarget and PFresh stores require fresh produce, refrigerated and frozen items. Food distribution centers owned by SuperValu have been utilized by Target for many years. In October 2003, SuperValu's facility in Phoenix, Arizona, was converted to serve Target exclusively. The same change was implemented at the SuperValu center in Fort Worth, Texas. A new distribution center was constructed by Target in Lake City, Florida, to serve the Southeast, but it was operated by SuperValu until 2011 when it transitioned to Target. A fourth center in Cedar Falls, Iowa, opened in 2009 and is unique in that it is located adjacent to a standard Target Distribution Center, each utilizing the same dispatch office. Other warehouses owned by SuperValu are still used in other regions, but Target plans to replace those over the next few years. In Colorado, stores are serviced through "FreshPack Produce Inc." of Denver. In the mid-Atlantic region/Philadelphia market, C&S Wholesale Grocers services the fresh produce, meat, dairy, bakery, & frozen needs to "PFresh" stores.