MIFAB® BIG-SA Series HDPE rotational molded sand interceptor. Unit shall include: sand retention baffle with elevated 3″ diameter passageway, 3/8″ uniform wall thickness, adjustable lid system, sample port access and 4″ no hub inlet and outlet connections. Composite lids provides a water / gas tight seal and has a minimum of 20,000 lbs. load capacity. The lid is designed in accordance with the loading requirements of AASHTO H20.