Not to mention roofing nails, pieces of garden hose, plastic bags, and large chunks of redwood deck furniture! I got some of that stuff too, but I was stupid enough to pay a hefty fee for delivery. Almost all of it went into the garbage, recycling, and yard waste cans weekly and filled them up for the next month or so.
Redwood mulch is the very worst stuff because it also doesn't enrich the soil in any way. I do like to use the twice-ground redwood bark on my pathways, however. The last load of stuff I got for my driveways was plain wood chip and it's painful to walk on. The twice-ground bark is nice and soft and smells like a redwood forest for the first few weeks.