Highland - Underground Cylindrical Interceptors
Highland Single, Double and Triple Basin Interceptors collect sand, grit, grease and free oil (hydrocarbons and other petroleum products) from storm water runoff, spills and vehicle maintenance operations. Interceptors can be used in conjunction with high-performance oil/water separators. Double or triple basin interceptors may be connected directly to a sanitary sewer system or used in conjunction with a recycle wash water system.
Highland Tank`s Oil/Sand Interceptor (OSI) is a wastewater treatment tank designed to intercept and collect sand, grit, free-oil and grease (hydrocarbons and other petroleum products) and prevent their entry into the sanitary sewer system. Designed to accept gravity flow, the interceptor`s large volume allows for a lengthy retention time for sand, grit, free oil and grease to separate from the water due to their differences in specific gravity.
The interceptor contains one to four compartments (basins) where oil separates and floats to the surface, while sand and grit settle to the bottom sludge baffle. The clearer water beneath flows downward to the outlet downcomer where it is discharged from the quiescent section of the interceptor. OSI sizing and construction conforms to recognized plumbing codes and meets or exceeds many municipal industrial sewer pretreatment regulations.