Just down the asphalt path from the massive closed gates of the Chiquita Canyon Landfill, a few dozen local residents stood beside each other Saturday afternoon in a bid for a morale boost.   Longtime Val Verde resident Bill Monroe, who now lives with his wife Tamara in Lakeview Terrace, announced that he was hosting the prayer circle at the landfill at the last monthly Chiquita Landfill Community Advisory Meeting.  Bill and Tamara are among the hundreds of