Styrofoam balls

Styrofoam balls heading from Undercliff road towards Freshwater Beach. Thousands and thousands of these balls are found at the southern end of Freshie beach. We tried to clean up as many as we could last month but it's "Mission Impossible" to get them all. Are these balls coming from discarded bean bags, commercial packaging or ?
Styrofoam is to made from polystyrene and it's non-biodegradable and appears to last forever. It’s resistant to photolysis, or the breaking down of materials by photons originating from light. This, combined with the fact that Styrofoam floats, means that large amounts of polystyrene have accumulated along coastlines and waterways around the world. It is considered a main component of marine debris and it's often mistaken as food by animals.
Northern Beaches Council, we really need your help here. This is a big problem for our pristine beaches and fragile marine life.
Pic by: Mathew Baker