WASHINGTON, July 3 -- The Equal Employment Opportunity Commission issued the following news release: * * * EEOC Files Subpoena Enforcement Action Against Vallarta Food Enterprises * Federal Agency Seeks Court Order Compelling Grocer to Provide Information Relating to Its Employment and Hiring Practices LOS ANGELES - The U.S. Equal Employment Opportunity Commission (EEOC) announced today it filed an action in federal court to enforce a subpoena issued during its investigation into claims of  more