...contribute significantly to aquatic toxicity in many Southern California freshwater and saltwater environments, and in particular have been identified as important sources of toxicity in Newport Bay (=-=Lee and Taylor, 1999-=-, 2001, SA RWQCB, 2001). In 1993 Orange County completed the “Newport Bay Watershed Toxicity Study,” commissioned by the Regional Water Quality Control Board (RWQCB), which found that heavy metals wer...