Ultratech 9218 ultra-drain guard, oil and sediment, 48in x 36in x 18in, pack of 10 the ultra-drain guard is engineered to filter stormwater waste before it becomes a problem in the water system. as a storm drain filter, it removes contaminants like litter, sand and oil from stormwater flow. its geotextile fabric and easy installation make it ideal for industrial facilities, construction sites and parking lots where stormwater runoff is likely to carry oil, eroded soil, debris and fuel contaminants from cars. to install simply lift catch basin grating, insert drain guard into opening and replace the grating, making sure to pinch fabric to hold the unit in place. It exceeds 80% sediment removal efficiency. the oil and sediment model removes up to .87 gallons of hydrocarbons as well as dirt, sand and other contaminants. Helps comply with npdes, spcc and tmdl. It is an ecosmart product