MIFAB® Series BIG-300-OS HDPE rotational molded oil/sediment interceptor with solids holding capacity of 300 gal. Unit shall include: 3/8 in uniform wall thickness, deep seal trap covered by Load Class C ductile iron top inlet grates, sediment bucket (1/4 in Dia Holes) within adjustable top assembly system, internal air relief by-pass and sample port access.