A crescent-shaped public city beach in the Bronx, man made by filling in one-third of Pelham Bay with landfill and sand, is jam packed in the summertime. Today, it was practically deserted although the weather was unexpectedly sunny, mild, and beautiful. Once this beach was referred to as the Bronx Riviera. However, reviews in recent years have earned it low grade marks for pollution and for violating health standards. Sad...today a stretch of sand was neatly tread-mark combed and the the sun-splashed water glistened.