The sites selected for the in situ toxicity testing program are

Site D - Mud Slough downstream of SLD discharge

Site F - Salt Slough near Highway 165

Control - Windmill Site on Kesterson National Wildlife Refuge (fresh water supply)

Site B - SLD Water (will not be used until SLD is in operation)

4.6.2.3 Frequency of sampling

In situ testing will be conducted quarterly. In addition to one pre-project base line test, in situ testing will begin within a week of the SLD initiation. Quarterly in situ testing will provide data concerning GBP water that will complement monthly laboratory tests and other biological studies being conducted over the course of the project.