Specially designed for organic analysis. Fluorinated upper structure prevents oil and grease from sticking. Collects a full one liter first flush grab sample into a 1000ml amber glass sample bottle within the first minutes of storm water outfall flow. Floating ball valve automatically closes off sample port after bottle is full to prevent comingling with later run-off and volatile analyte loss. Meets EPA NPDES MSGP (Fed. Reg. FRL-6880-5 10/20/00) and most state general permit grab sampling requirements. Sampling device intended for one-time use. Use with Storm Water Mounting Kit (See Item #: W4075-2). Amber glass bottle EPDM gasket fluorinated high-density polyethylene upper dome polypropylene ball valve and Teflon-lined closure. Capacity: 1000ml. 4/Case. Nalgene® #: 1120-1000.