CONTENTS 1.0 INTRODUCTION ...............................................................................................................1 2.0 PROJECT DESCRIPTION AND CURRENT STATUS ......................................................1 2.1 Site Infrastructure .......................................................................................................3 2.1.1 Offloading Facility and Sediment Pipeline .........................................................3 2.1.2 Sediment Placement Cells ..................................................................................3 2.1.3 Decant Water Drainage System ..........................................................................4 2.1.4 Makeup Water Pond and Discharge Pipe ............................................................4 2.1.5 Water Supply and Water Management Practices ................................................5 2.1.6 Groundwater Monitoring Wells..........................................................................6 2.1.7 Rehandling Facility ............................................................................................7 2.2 Dredged Sediment Types and Quantities .....................................................................7 2.3 Overview of Project Monitoring .................................................................................8 2.3.1 Groundwater Background Sampling ..................................................................9 2.3.2 Reference Site Sampling ....................................................................................9 2.3.3 Historic Trends in Onsite Monitoring Results.....................................................9 2.4 Sediment Placement History ..................................................................................... 13 2.5 Project Status ............................................................................................................15 2.6 Project Team and Management Structure .................................................................. 15 2.7 Questions to be Answered by the Monitoring Program .............................................. 17 3.0 2010/2011 MONITORING ACTIVITIES .......................................................................... 18 3.1 Sediment Monitoring Program .................................................................................. 18 3.1.1 Confirmation of Incoming Dredged Sediment .................................................. 18 3.1.2 Makeup Water Pond ........................................................................................ 19 3.1.3 Methods for Sediment Sampling ...................................................................... 19 3.2 Surface Water Monitoring Program .......................................................................... 19 3.2.1 Influent Water Supply ...................................................................................... 19 3.2.2 Makeup Water Pond ........................................................................................ 20 3.2.3 Receiving Waters .............................................................................................20 2010-2011 sed & wq report final: Rev 0 Page i 3.2.4 Sediment Placement Cells ................................................................................ 20 3.2.5 Return Water Channel ...................................................................................... 21 3.2.6 Methods for Surface-Water Sampling .............................................................. 22 3.3 Groundwater Monitoring Program ............................................................................ 22 3.3.1 Groundwater Monitoring Wells........................................................................ 22 3.3.2 Off-site Supply Wells ...................................................................................... 22 3.3.3 Methods for Groundwater Sampling ................................................................ 23 4 .0 2010/2011 SAMPLING AND MONITORING RESULTS ................................................. 23 4.1 Sediment Sampling Results ....................................................................................... 23 4.2 Surface and Groundwater Sampling Results .............................................................. 24 4.2.1 Inorganics ........................................................................................................24 4.2.2 Organics ..........................................................................................................30 4.2.3 Conventional Parameters ................................................................................. 30 5.0 CONCLUSIONS ...............................................................................................................31 6.0 REFERENCES ..................................................................................................................34 TABLES 1 Phase I Cell Acreage 2 Water Criteria 2000 – Nov. 2012 3 Updated Water Criteria (as of Nov. 2012) 4 Sediment Criteria 5 Action Level/Background Exceedance Summary 6 Site Water Management Summary 7a Summary of Inorganics in Sediment 7b Summary of PAHs in Sediment 7d Summary of PCBs in Sediment 7e Summary of Conventional Parameters in Sediment 8a Summary of Inorganics in Surface and Groundwater 8b Inorganics Exceeding Water Quality Criteria in Surface Water 8c Inorganics Exceeding Water Quality Criteria in Groundwater 8d Summary of Pesticides in Surface and Groundwater Page ii 2010-2011 sed & wq report final:Rev 0 8e Summary of Conventional Water Quality Parameters in Surface and Groundwater B-1 Analytical Methods B-2 Required Quantitation Limits D-1 Precision and Accuracy Goals FIGURES 1 Site Vicinity 2 Created Habitat 3 Site Overview 4 Reference Sites 5 Cell Filling Timeline 6 Approximate Sampling Locations, Phase I 7 Approximate Sampling Locations, Operations Area 8 Mean Concentrations of Inorganics in Water from Sediment Placement Cells, 2010 – 2011 9 Inorganics in Cell 1 (Completed Noncover) Water, 2010 – 2011 10 Inorganics in Cell 1 (Completed Noncover) Water, 2006 – 2011 11 Inorganics in Cell 2 (Completed Noncover) Water, 2010 – 2011 12 Inorganics in Cell 2 (Completed Noncover) Water, 2006 – 2011 13 Inorganics in Cell 3/4 (Noncover) Water, 2010 – 2011 14 Inorganics in Cell 3/4 (Completed Noncover) Water, 2006 – 2011 15 Inorganics in Cell 6/7 (Cover) Water, 2010 – 2011 16 Inorganics in Cell 6/7 (Cover) Water, 2006 – 2011 17 Nickel in Cell 6, 7A, and 7B (Cover) Water, 2010 – 2011 18 Nickel in Cell 6, 7A, and 7B (Cover) Water, 2006 – 2011 19 Zinc in Cell 6, 7A, and 7B (Cover) Water, 2010 – 2011 20 Zinc in Cell 6, 7A, and 7B (Cover) Water, 2006 – 2011 21 Inorganics in Cell 8/9 (Cover) Water, 2010 – 2011 22 Inorganics in Cell 8/9 (Cover) Water, 2006 – 2011 23 Inorganics in Cell 10 (Cover) Water, 2010 – 2011 24 Inorganics in Cell 10 (Cover) Water, 2006 – 2011 25 Inorganics in Cell 11 (Completed Noncover) Water, 2010 – 2011 26 Inorganics in Cell 11 (Completed Noncover) Water, 2006 – 2011 2010-2011 sed & wq report final: Rev 0 Page iii 27 Arsenic in Phase I Monitoring Wells, 2003 – 2011 28 Chromium in Phase I Monitoring Wells, 2003 – 2011 29 Copper in Phase I Monitoring Wells, 2003 – 2011 30 Mercury in Phase I Monitoring Wells, 2003 – 2011 31 Nickel in Phase I Monitoring Wells, 2003 – 2011 32 Selenium in Phase I Monitoring Wells, 2003 – 2011 33 Zinc in Phase I Monitoring Wells, 2003 – 2011 34 Salinity in Cell 1 Water, 2004 – 2011 35 Salinity in Cell 2 Water, 2004 – 2011 36 Salinity in Cell 3/4 Water, 2004 – 2011 37 Salinity in Cell 6 Water, 2006 – 2011 38 Salinity in Cell 7 Water, 2006 – 2010 39 Salinity in Cell 8/9 Water, 2005 – 2011 40 Salinity in Cell 10 Water, 2005 – 2011 41 Salinity in Cell 11 Water, 2006 – 2011 APPENDICES A Sample Identification Numbers B Analytical Methods C Data Management D Data Validation E Audits and Corrective Action F 2010 – 2011 Sediment Data G 2010 – 2011 Water Data Page iv 2010-2011 sed & wq report final:Rev 0 1.0 INTRODUCTION On behalf of Montezuma Wetlands LLC (MWLLC), Acta Environmental (Acta) in collaboration with Lipton Environmental Group (LEG) has prepared this Monitoring Report (“the Report”) on sediment and water quality at the Montezuma Wetlands Project site (“Montezuma” or “the project”) during 2010 and 2011. This monitoring effort was based on the project’s Quality Assurance Project Plan (QAPP; LEG 2003a), Sediment Confirmation Sampling Plan (SCSP; LEG 2003b), and Mitigation, Monitoring, and Reporting Plan (MMRP; LFR 2000). In accord with the QAPP, SCSP, MMRP, and project permits, concentrations of chemicals of concern (COCs) in sediment, surface water, and groundwater were monitored and compared to relevant criteria to assess project performance and inform adaptive management decisions. Adaptive management options and decisions are reviewed with Montezuma’s Technical Review Team (TRT) that is administered by the San Francisco Estuary Institute. Performance criteria and contingency measures for sediment, water, and tissue are described in project permits and the MMRP (see MMRP Table 5, lines 15-18, 36- 39, 45, and 54; and MMRP Appendix B). This report presents monitoring data for 2010 and 2011. A report on project operations for this same time period will be prepared by FarWest Restoration Engineering (FRE), Montezuma’s Chief Engineer. This report is organized as follows: Section 1.0 Introduction Section 2.0 Project Description and Current Status Section 3.0 2010/2011 Monitoring Activities