The County Purchasing Agent is authorized to review and revise all product procurement specifications to establish a preference for those products containing compost material generated by composting operations located within Prince George's County or operations consuming organic materials collected in the County, recycled materials including paper and paper products, asphalt pavement, crushed concrete subbase and foundry slag, and paving materials utilizing recycled materials including, but not limited to, crumb rubber from tires, ash, glass, and glassy aggregates, and to provide bid specifications encouraging the maximum purchase of recyclable asphalt pavement and paving materials utilizing recycled materials.