Shred Day returns May 1 to Gateway parking lot Shred Day returns to the Gateway parking lot on Monday, May 1, from 9 a.m. to noon, or until the trucks are full. Because Shred Day is so popular, two trucks will be onsite. T he cost is $5 per bag or banker’s box. Check or cash only. Exact change is required. Checks should be made out to GRF. For questions, call 1-925-988-7700.