MODERATE CONGESTION; SLOW TRAFFIC; DELAYS EXTEND ONTO 395 TO TRASH TRUCK WRECK BEFORE WASHINGTON BLVD; LEFT LANE STILL BLOCKED BECAUSE FUEL SPILLED; HOV S SLOW FROM 7100 ONTO 395 OFF AND ON TO THE WRECK; NORTHBOUND RTE 1 SLOW OPITZ BLVD OFF AND ON TO GUNSTON RD AND TELEGRAPH RD TO 7100;