ederal, state, and local sustainable site regulations aim to reduce environmental impacts of increased runoff from roofs and pavements. Past practices for controlling stormwater have included detention ponds for collecting runoff and slowly releasing it into a lake, stream, or storm sewer system. Permeable Interlocking Concrete Pavers (PICP) systems are a cost-effective stormwater control measure and can provide 20 to 25 years of service when carefully constructed and maintained.