The GBP monitoring program is a multi-agency cooperative effort which incorporates and relies on the continuation of ongoing monitoring programs and the availability of data from those programs for use in assessing environmental effects.

Sediment and water quality data will be collected by USBR and the CVRWQCB, and flow data will be collected by USGS and USBR. The CVRWQCB currently collects water samples at weekly intervals for routine analyses from all of the proposed primary sites except Sites A,B,C and I. The proposed monitoring program will add these sites to the CVRWQCB program and will increase the number of analyses being performed. The USGS will operate real time flow sites at the Mud Slough (D), Salt Slough (F), and San Joaquin River at Crows Landing (N)sites. The USGS operated these hydrologic gauging sites with funding from the State Water Resource Control Board (SWRCB) until 1994. The sites were then operated by DWR, with assistance from USGS, as part of the real-time water quality demonstration project conducted by the SJRMP under the USBR Challenge Grant Program. USGS has resumed operation of these sites with funding from USBR. USGS will also measure flow at Site E for this project with funding from the SLD-MWA. The USBR will measure flow at sites A and B within the SLD. USBR will collect sediment samples in the SLD, Mud Slough, and Salt Slough.

The USFWS will conduct the biota sampling on Mud and Salt Sloughs at Sites C, D, and F, as well as the backwater, Site I. USFWS has been conducting sampling at these sites for several years through its contaminant monitoring program. Similarly, the CDFG will conduct the biota sampling on lower Mud Slough (Site E) and on the San Joaquin River (Sites G and H). CDFG collects data from these sites under a contaminant monitoring program funded by the SWRCB.

The toxicity testing program will be conducted by Block Environmental Services (BES) through a contract with the SLD-MWA. USFWS will perform selenium analysis on algae samples provided by BES.

USBR will provide the GBP Quality Assurance Officer (QAO). The QAO will be responsible for implementation of the QAPP.

The SLD-MWA will perform sediment surveys and will provide field support in data collection and in the installation of monitoring devices and structures. The San Luis National Wildlife Refuge Complex, North Grasslands Wildlife Management Area, and GWD will provide logistic support in terms of access to monitoring sites.