a low cost oil , grease removal assembly includes a rotomolded plastic container having an inlet and an outlet ; a rotomolded plastic basket support located at the inlet inside the container ; a rotomolded plastic outlet baffle located in the container at the outlet ; a plurality of container cover sections including a first section to cover the basket support , a second container cover section having an oil , grease removal mechanism downstream of the basket support and upstream of the outlet baffle , and a third container cover section to cover the outlet baffle .