Conference called onsite to review dewatering system prior to using. Inspection yielded the following corrections before dewatering may begin: 1) Plastic sheeting used to stabilized the slopes is not keyed in at the top. We discussed using sandbags in lieu of trenching on the two asphalt sides, 2) overlap is not sealed sufficiently, 3) two holes in plastic need repaired. 4) Slopes not 2:1. Discussed safety concern about steep slopes with no point of egress.