Shred Day is Saturday The Recreation Department is holding a Shred Day on Saturday, Aug. 3, from 9 to 11 a.m. or until trucks are full, in the Gateway parking lot. The cost is $5 per banker box, or the equivalent of a 12-by-10-by-15-inch box. Staff will be on hand to assist with unloading. For more information, call 925-988-7700.