RANCHO CUCAMONGA - For workers like Jose Fernando Pedraza, the closure of the day labor center has created hardship. "I've only had one job since it closed,'' Pedraza said in Spanish on Thursday. The center, which had been set up near the corner of Grove Avenue and Arrow Route, closed June 30. This week, workers have waited along the east side of Grove, north of Arrow, for employers seeking short-term workers for jobs in trades such as landscaping, construction and general labor. Without the center, workers said, getting jobs has become difficult. Gilberto Ruiz, 68, of Ontario, does masonry work...