June 2017 Port of Stockton Maintenance Dredging Sediment Characterization. Notice of Intent. Prepared for the Port of Stockton

June 2017 Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Notice of Intent Prepared for the Port of Stockton

June 2017 Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Notice of Intent Prepared for Port of Stockton 2201 West Washington Street Stockton, California 95203 Prepared by Anchor QEA, LLC 130 Battery Street, Suite 400 San Francisco, California 94111 Project Number: 160377-01.01

TABLE OF CONTENTS 1 Introduction... 1 1.1 Dredge Project Area Description... 1 1.2 Agency Permitting and Review... 2 2 Dredge Plan... 3 2.1 Dredging Method Overview... 3 2.2 Dredging Rates... 3 2.3 Best Management Practices... 3 2.4 Method of Transporting Dredged Material... 4 2.5 Dredge Material Placement Sites... 5 3 Pre-dredge Sampling Summary... 6 3.1 Sediment Core Collection... 6 3.2 Sediment Core Sample Processing... 6 3.3 Background Soil Sample Collection and Processing... 7 4 Pre-dredge Sampling Results... 8 4.1 Upland Disposal Assessment... 8 4.1.1 Metals... 8 4.1.2 Polycyclic Aromatic Hydrocarbons... 9 4.1.3 Total Petroleum Hydrocarbons... 9 4.2 Antidegradation Assessment... 9 4.2.1 Metals... 9 4.2.2 Polycyclic Aromatic Hydrocarbons... 9 4.3 Quality Assurance/Quality Control... 9 5 Conclusion... 10 6 References... 11 FIGURES Figure 1 Figure 2a Figure 2b Figure 3a Figure 3b Port of Stockton Docks and Dredge Material Placement Sites West Complex Actual Coring Locations East Complex Actual Coring Locations Roberts Island Dredge Material Placement Site Sample Locations Rough and Ready Island Dredge Material Placement Site Sample Locations Notice of Intent i June 2017

TABLES Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Core Collection Summary Dredge Management Placement Site Soil Collection Summary Sample Inventory Sediment Results Upland Soil Results DI-WET Results Surface Water Result APPENDICES Appendix A Appendix B Field Forms Laboratory Data Reports Notice of Intent ii June 2017

ABBREVIATIONS ALS BMP CDFW cy DGPS DI-WET DMPS DO DU DWSC ESA GO LCS MLLW MS/MSD NMFS NOA NOI PAH PEL Port QA/QC R/V RI RRI RWQCB SAP TPH USACE USFWS ALS Environmental best management practice California Department of Fish and Wildlife cubic yard differential global positioning system Deionized Water Waste Extraction Test dredge material placement site dissolved oxygen dredge unit Deep Water Ship Channel Endangered Species Act Waste Discharge General Order No. R5-2009-0085 laboratory control sample mean lower low water matrix spike and matrix spike duplicate National Marine Fisheries Service Notice of Applicability Notice of Intent polycyclic aromatic hydrocarbon Probable Effects Level Port of Stockton quality assurance and quality control research vessel Roberts Island Rough and Ready Island Central Valley Regional Water Quality Control Board Sampling and Analysis Plan total petroleum hydrocarbons U.S. Army Corps of Engineers U.S. Fish and Wildlife Service Notice of Intent iii June 2017

1 Introduction The Port of Stockton (Port) conducted pre-dredge sediment characterization at 19 berths along the San Joaquin River in the City of Stockton, California (Figure 1). Due to high sedimentation rates in the San Joaquin River, the Port typically conducts maintenance dredging of its berths on an annual basis. To streamline regulatory agency reviews and minimize permitting-related construction delays, the Port is requesting approval from regulatory and resource agencies, including the Central Valley Regional Water Quality Control Board (RWQCB), to conduct maintenance dredging over a 5-year period to maintain adequate navigational and operational depths for commercial vessel traffic. Docks 2 through 13 operate along the waterfront of the Port s East Complex, and Docks 14 through 20 operate along the neighboring Rough and Ready Island (West Complex; RRI). The RWQCB has issued the Waste Discharge General Order No. R5-2009-0085 (GO; RWQCB 2009) to conduct maintenance dredging to authorized depths, including placement of dredge sediments at dredge material placement sites (DMPSs). Anchor QEA, LLC, has prepared this Notice of Intent (NOI) in accordance with the GO for the Port East and West complexes. The Port is requesting a Notice of Applicability (NOA) for the 5-year maintenance dredging project. 1.1 Dredge Project Area Description The proposed dredge plan includes maintenance dredging at Docks 2 through 20 (Figure 1). Eight dredge units (DUs) were sampled and characterized (Table 1; Figures 2a and 2b). The DU for Docks 12 and 13 will be dredged to a depth of -40 feet mean lower low water (MLLW), plus 2 feet of allowable overdepth. All other DUs will be dredged to a depth of -35 feet MLLW, plus 2 feet of allowable overdepth. Dredged material volume estimates were developed based on recent bathymetric condition surveys conducted by etrac, Inc., on July 28, 2016, August 24, 2016, and January 19, 2017. The total volume of existing sediment requiring maintenance dredging (including overdepth) at the Port docks is approximately 75,000 cubic yards (cy). Table 1 summarizes the total proposed maintenance dredging volumes for each DU. Proposed dredged material from all docks will be evaluated for disposal at Rough and Ready Island (RRI) and Roberts Island (RI) DMPSs. The Port is requesting approval from the RWQCB to conduct maintenance dredging at its docks over a 5-year period during which additional sediment will deposit within the dredge prism; however, newly deposited sediment would be anticipated to be similar in nature to the sediment that has currently settled at the docks. Therefore, the sediment characterization results collected this spring would be representative of future sediment deposition over a 5-year period. Notice of Intent 1 June 2017

1.2 Agency Permitting and Review The Port s maintenance dredging efforts require permits from the U.S. Army Corps of Engineers (USACE), including Endangered Species Act (ESA) consultations with the National Marine Fisheries Service (NMFS), the U.S. Fish and Wildlife Service (USFWS), and the California Department of Fish and Wildlife (CDFW). Permits have historically been issued on an episodic and annual basis. Similarly, the Port has historically received approval from the RWQCB to dredge and place material at its upland placement sites on an episodic and annual basis. To minimize efforts on the part of the Port and agencies, and to increase the predictability for dredging timing each year, the Port is in the process of pursuing 5-year programmatic approvals for maintenance dredging of its docks from the USACE (Section 10 Permit). Five-year programmatic permits have already been obtained from CDFW (Section 1600 Permit) and the RWQCB (401 Water Quality Certification). Notice of Intent 2 June 2017

2 Dredge Plan The Port owns and operates all docks along the East and West complexes. In the East Complex, Docks 2 through 11 are maintained at a nominal depth of -35 feet MLLW, and Docks 12 and 13 are maintained at a nominal depth of -40 feet MLLW, both with an additional 2 feet of allowable overdepth. The additional 5 feet of depth at Docks 12 and 13 is associated with a sediment trap intended to capture sediment flowing down the San Joaquin River to minimize sedimentation in the Stockton Deep Water Ship Channel (DWSC). The West Complex is maintained at a nominal depth of -35 feet MLLW at Docks 14 through 20, with 2 feet of allowable overdepth. The Port has historically conducted maintenance dredging of its berths between August 1 and November 30, but is in the process of obtaining an expanded work window beginning July 1. This work window would only become valid upon issuance of required federal and state permits noting its acceptability. Dredging durations vary annually, but have typically been in the range of 30 to 60 days. 2.1 Dredging Method Overview A hydraulic suction cutterhead dredge will be the primary dredging methodology employed by the Port at its docks, with up to 22,000 feet of plastic pipeline transporting dredged material to the Portoperated RI and/or RRI DMPSs. In 2014, however, the Port received authorization to use a mechanical dredge for maintenance dredging at Docks 16 through 20 due to large debris that was causing hydraulic dredge equipment failures. The Port intends to conduct hydraulic dredging for maintaining its docks; however, both types of dredging techniques (hydraulic and maintenance) were included in the 5-year permit applications to allow for flexibility in contractor procurement processes. 2.2 Dredging Rates Dredging rates vary depending on the type of material being dredged and downtime where no dredging occurs to allow for repositioning of equipment and switching of crew, but production rates of 300 to 600 cy per operational hour are typical. Dredging is anticipated to occur 24 hours per day, 7 days per week. 2.3 Best Management Practices Dredging will follow the applicable best management practices (BMPs) as outlined in the regulatory permit applications for the 5-year maintenance dredging program, including the following: During construction, the contractor will be required to implement the water quality monitoring program, which involves twice daily monitoring at the 300-foot mixing zone from dredging operations for compliance with turbidity, dissolved oxygen (DO), temperature, and ph requirements. Notice of Intent 3 June 2017

Dredging will be conducted between July 1 and November 30 to avoid the early summer months when temperatures are normally high and DO levels are normally low, thereby minimizing potential impacts to water quality. The Port s operation of aeration devices at Dock 13 or Dock 20 may help to increase the DO levels during dredging operations. If needed to maintain acceptable DO levels, the Port could operate its aeration facilities during dredging. To verify that contaminants are not accidently introduced into the waterway, the Port would implement standard erosion and sediment controls and spill prevention and response measures in and around the proposed project area. The contractor responsible for operating the dredging equipment would be responsible for ensuring that such measures are adhered to. Floating debris will be removed from the water and disposed of properly. No dredging work will be conducted from land-based equipment. All dredged material will be handled and transported such that it does not re-enter surface waters outside of the protected immediate work area. Dredging at each project location will be limited to the approved project depth plus overdepth. Hydraulic dredging measures, as follows: The cutterhead rotation speed will be reduced as needed to reduce the potential for side-casting the excavated sediment away from the suction entrance and resuspending sediment. The swing speed will be reduced as needed to ensure that the dredge head does not move through the cut faster than it can hydraulically pump the sediment. Reducing swing speed reduces the volume of resuspended sediment. The goal is to swing the dredge head at a speed that allows as much of the disturbed sediment as possible to be removed with the hydraulic flow. Typical swing speeds range from 5 to 30 feet per minute. Bank undercutting will be eliminated, and sediment will be removed in maximum lifts equal to 80% or less of the cutterhead diameter. The hydraulic dredge will operate on the bottom of the channel, and the velocity of water moving toward the dredge cutterhead will be less than 0.1 feet per second within 9 feet of the suction pipe opening. 2.4 Method of Transporting Dredged Material The liquefied dredged material, typically 10% to 20% solid, will be hydraulically transported through a continuous pipeline to the specified DMPS. The actual pipeline route will be determined by the contractor. Generally, the pipeline is placed close to the shoreline to avoid conflicts with navigation. At channel crossings, the pipeline will be submerged to minimize impact to navigation. Navigational Notice of Intent 4 June 2017

aids for the pipeline and dredge plant will be in accordance with U.S. Coast Guard and Department of Army regulations. 2.5 Dredge Material Placement Sites Two DMPS are proposed for this project. Annual events have estimated volumes of under 100,000 cy of dredged slurry, which will be distributed to one or both Port-owned DMPSs. Pooling will be monitored to make sure direct discharges to the water do not occur. Rough and Ready Island. RRI is located adjacent to Docks 14 through 20. The DMPS location is in the southeast corner of the island. Roberts Island. RI is located west of the dredge area. The DMPS location is in the northeast portion of RI, along the man-made portion of the Stockton River. Notice of Intent 5 June 2017

3 Pre-dredge Sampling Summary Sampling was conducted by Anchor QEA in accordance with the approved 2017 Sampling and Analysis Plan (SAP; Anchor QEA 2017) between March 20 and 24, 2017. The SAP provides the sample design, target sampling locations, procedures for sample collection and processing, and data reporting requirements. The SAP complies with the requirements established in GO No. R5-2009- 0085 and was approved by the RWQCB prior to sample collection. 3.1 Sediment Core Collection Eight DUs were established to characterize sediment spatially across the East and West complexes. One core was collected for each 5,000 cy of sediment. Table 1 provides core station coordinates, collection dates, mudline depths, and docks included in each of the DUs. Appendix A provides field logs. Sampling was conducted aboard the research vessel (R/V) Leviathan, operated by subcontractor Leviathan Environmental Services, LLC, using an electrically-powered vibracore. Core tubes consisted of polyethylene liners inside a 4-inch outer diameter aluminum core barrel with a stainless-steel catcher to retain the sediment. A hand-held differential global positioning system (DGPS) unit was used for positioning. Water depth was measured using a lead line or hand-held fathometer from the bow of the R/V Leviathan. The mudline elevation relative to the MLLW datum was determined by adding the predicted water level elevation for Stockton, California (California Department of Water Resources Stockton Deep Water Channel Station [SKT] on Rough and Ready Island) to the measured depth. Sampling consisted of collecting sediment cores at two stations within DUs 1, 3, 4, 7, and 8, and three stations within DUs 2, 5, and 6, for a total of 19 stations. Sediment cores were collected at each location to project depth, plus 2 feet of overdepth, plus a new horizon layer (1 foot of sediment that represents the post-dredge surface). Per the SAP, sediment cores were collected from within a 50-foot radius of the proposed targets, except for three locations (DU3-2, DU4-2, and DU5-1) where the project manager selected an alternate location within the same DU. 3.2 Sediment Core Sample Processing Sediment core samples were processed onboard the sampling vessel. The physical characteristics of each core were noted on a sediment core processing form (Appendix A). Sediment from each core within a DU was collected to the project maintenance dredge depth plus 2 feet of overdepth, and was homogenized to a uniform consistency in a stainless-steel bowl using a drill with mixer attachment. A 1-foot new horizon layer sample was collected from each individual core within a DU and homogenized in a stainless-steel bowl using a drill with mixer attachment. Sediment was then spooned into laboratory-supplied jars for analyses, as summarized in Table 3. The new horizon layer composite samples were archived for additional chemical and biological testing. Notice of Intent 6 June 2017

3.3 Background Soil Sample Collection and Processing Soil samples for background characterization were collected from representative sample locations within each DMPS area using a hand auger (Figures 3a and 3b). Navigation and positioning were accomplished using a hand-held DGPS device with an accuracy of plus or minus 10 feet. Three composite samples were generated from nine sample locations evenly distributed throughout the DMPS area. The centroid of the sample locations that comprise each composite sample is provided in Table 2 and Figures 3a and 3b. Appendix A provides field logs. Notice of Intent 7 June 2017

4 Pre-dredge Sampling Results Physical and chemical analyses were performed on composite sediment and soil samples as summarized in Table 3. Testing included metals (bulk and Deionized Water Waste Extraction Test [DI-WET]), polycyclic aromatic hydrocarbons (PAHs), total petroleum hydrocarbons (TPH), grain size, total organic carbon, bulk density, moisture content, ph, cation exchange capacity, ammonia, and sulfide. All testing was conducted at Eurofins Calscience laboratory in Garden Grove, California, except for DI-WET reanalysis, which was tested at ALS Environmental (ALS) in Kelso, Washington (described in Section 4.1.1). Sample results are provided in Tables 4 through 7, and laboratory data reports are provided in Appendix B. Dredge material and upland soil were analyzed to determine the following: 1. Applicability of representative dredge sediment for upland disposal at the two DMPSs. 2. Antidegradation assessment of the new horizon samples. 4.1 Upland Disposal Assessment Sediment results from dredge prism composite samples (Table 4) were screened against the USACE Applicability of Sediments for Upland Disposal Criteria in General Order R5-2004-0061-001 (RWQCB 2004) and upland soil results from the DMPS samples (Table 5). An insufficient number of data points were available to calculate representative background threshold values for the DMPSs, so dredge material results were compared to concentration ranges in the upland samples. Results indicate that there are a few screening level exceedances, but most results are consistent with DMPS background concentrations and are unlikely to negatively impact upland soil quality at the DMPSs. 4.1.1 Metals Bulk sediment metals were generally below USACE criteria (RWQCB 2004) except for copper in two samples (DU2-COMP and DU4-COMP) and zinc in two samples (DU2-COMP and DU3-COMP). One DMPS soil sample also had zinc above the USACE criteria. DI-WET metals were analyzed at two different laboratories (Table 6). Calscience detection limits were elevated above several screening levels, so ALS (with lower detection limits) reanalyzed samples for select DI-WET metals. Copper and lead were above screening levels in most composite samples but also in most DMPS soil samples, indicating consistent concentrations of these elements. Nickel and zinc were above the screening levels and higher than the DMPSs in one dredge unit (DU4-COMP); however, initial analysis from Calscience were non-detect at levels below the screening level (29.8U and 35.2U micrograms per liter, respectively), indicating a potential sample heterogeneity issue. Overall, DI-WET metals in dredge material do not seem to be significantly greater than background soil concentrations and are generally below USACE upland disposal criteria. Hardness was measured in site surface water and is provided in Table 7. Notice of Intent 8 June 2017

4.1.2 Polycyclic Aromatic Hydrocarbons PAHs were below USACE criteria (RWQCB 2004) except for benzo(a)pyrene, which was slightly above the screening level in two samples (DU2-COMP and DU4-COMP). 4.1.3 Total Petroleum Hydrocarbons There are no TPH screening levels. Several samples had no detection of TPH. Samples with detections had concentrations of diesel and motor oil range hydrocarbons near the method detection limit. 4.2 Antidegradation Assessment Results from new horizon composite samples that represent the predicted post-dredge surface layer were screened against freshwater Probable Effects Level (PEL) Screening Levels (NOAA 2008). Dredge composites that exceeded a PEL were triggered for new horizon testing to determine if the new surface was above the screening level. In general, dredge material and/or new horizon samples are below freshwater PELs. In consultation with the RWQCB, new horizon surface sediment was not considered a benthic risk and bioassay analyses were not triggered for analysis. 4.2.1 Metals Cadmium was above the PEL in one composite sample (DU3-COMP). The associated new horizon sample was below the PEL. Nickel was slightly above the PEL in four composite samples (DU2-COMP, DU3-COMP, DU7-COMP, and DU8-COMP) and had similar concentrations in the new horizon samples. Upland soil background samples have similar nickel concentrations as the dredge and new horizon samples, indicating a regional concentration above the PEL. 4.2.2 Polycyclic Aromatic Hydrocarbons Two dredge samples exceed a PEL. Sample composite DU4-COMP has acenaphthylene above the PEL and DU5-COMP has acenaphthylene and fluorene above the PEL. The associated new horizon samples had lower concentrations and were below PELs except for acenaphthylene in sample DU5-Z, which was still slightly above the PEL. 4.3 Quality Assurance/Quality Control Laboratory quality assurance and quality control (QA/QC) procedures, where applicable, included initial and continuing instrument calibrations, laboratory control samples (LCSs), laboratory replicates, matrix spike and matrix spike duplicate (MS/MSD) samples, surrogate spikes (for organic analyses), and method blanks. All QC samples were analyzed at the frequencies required in the SAP. There were some MS/MSD results that indicate potential matrix interference in some PAH compounds (fluoranthene, phenanthrene, and pyrene) and metals (barium, chromium, lead, nickel, and zinc). The data quality assessment indicates that data are usable and complete (all samples and tests analyzed in accordance with the SAP). Notice of Intent 9 June 2017

5 Conclusion Hydraulically dredged sediments will be placed directly upland and there is no anticipated discharge back into the river. While the DI-WET metals tests indicated elevated levels of copper and lead in most samples, similar concentrations are already present in the DMPS soils. The one DU with elevated nickel and zinc seems to be a data anomaly since the original result was non-detect. The new horizon surface layer will have lower concentrations than the pre-dredge surface and is below NOAA PELs, except for one slight exceedance of acenaphthylene. It is anticipated that maintenance dredging at the Port docks will not cause any negative impact to the water quality or biologically active zone. Notice of Intent 10 June 2017

6 References Anchor QEA, 2017. Sampling and Analysis Plan. Prepared for Port of Stockton. NOAA (National Oceanic and Atmospheric Administration), 2008. Screening Quick Reference Tables (SQuiRTs). https://repository.library.noaa.gov/view/noaa/9327. RWQCB (California Regional Water Quality Control Board, Central Valley Region), 2004. Order No. R5-2004-0061-001: Waste Discharge Requirements for United States Army Corps of Engineers, Department of Water Resources and The Port of Stockton, Stockton Deep Water Ship Channel Maintenance Dredging Activities from Channel Mile 4.4 to Mile 41.0 Contra Costa, Sacramento and San Joaquin Counties. RWQCB, 2009. Order No. R5-2009-0085: General Waste Discharge Requirements for Maintenance Dredging Operations, Sacramento-San Joaquin Delta. Notice of Intent 11 June 2017

Tables

Table 1 Core Collection Summary Authorized Port of Total Mudline Depth Plus Sample Interval Stockton Dredge Docks Dredge Collection Depth 2 foot Beneath Mudline Complex Unit Included Volume 3 Station ID Date X Coordinate 1 Y Coordinate 1 (feet MLLW) Overdredge Interval (feet MLLW) Composite Samples DU1-1 3/23/2017 6325362 2169858-33.0-37.0 A -33.0 to -37.0 Z -37.0 to -38.0 DU1-COMP: DU1-1 and DU1-2 Surface (A) intervals DU1 2, 3 5,155 DU1-2 3/23/2017 6325152 2170051-33.0-37.0 A -33.0 to -37.0 Z -37.0 to -38.0 DU1-Z (Archive): DU1-1 and DU1-2 New Horizon (Z) intervals A -31.2 to -37.0 DU2-COMP: DU2-1 3/22/2017 6324815 2170182-31.2-37.0 DU2-1, DU2-2, and Z -37.0 to -38.0 DU2-3 DU2 4, 5, 6 10,612 DU2-2 3/22/2017 6324102 2170142-31.7-37.0 A -31.7 to -37.0 Z -37.0 to -38.0 Surface (A) intervals DU2-Z (Archive): DU2-1, DU2-2, and A -34.5 to -37.0 DU2-3 East Complex DU2-3 3/22/2017 6323414 2170090-34.5-37.0 Z -37.0 to -38.0 New Horizon (Z) intervals DU3 7, 8, 9, 10, 11 6,851 DU3-1 6323550 2169752-33.6-37.0 A -33.6 to -37.0 (Attempt 1) 3/21/2017 DU3-1 6323607 2169696-34.6-37.0 Z -37.0 to -38.0 (Attempt 3) A -30.9 to -37.0 DU3-2 3/21/2017 6321342 2169938-30.9-37.0 Z -37.0 to -38.0 DU3-COMP: DU3-1 (#1) and DU3-2 Surface (A) intervals DU3-Z (Archive): DU3-1 (#3) and DU3-2 New Horizon (Z) intervals DU4-1 3/21/2017 6320887 2169574-37.9-42.0 A -37.9 to -42.0 Z -42.0 to -43.0 DU4-COMP: DU4-1 and DU4-2 Surface (A) intervals DU4 12, 13 8,360 DU4-2 3/21/2017 6320715 2169334-36.0-42.0 A -36.0 to -42.0 Z -42.0 to -43.0 DU4-Z (Archive): DU4-1 and DU4-2 New Horizon (Z) intervals A -33.3 to -37.0 DU5-COMP: DU5-1 3/22/2017 6317394 2170966-33.3-37.0 DU5-1, DU5-2, and Z -37.0 to -38.0 DU5-3 DU5 14, 15, 16 14,053 DU5-2 3/23/2017 6315789 2171595-33.0-37.0 A -33.0 to -37.0 Z -37.0 to -38.0 Surface (A) intervals DU5-Z (Archive): DU5-1, DU5-2, and A -33.9 to -37.0 DU5-3 DU5-3 3/22/2017 6315219 2171880-33.9-37.0 New Horizon (Z) Z -37.0 to -38.0 intervals A -32.0 to -37.0 DU6-COMP: DU6-1 3/23/2017 6314562 2172113-32.0-37.0 DU6-1, DU6-2, and Z -37.0 to -38.0 DU6-3 DU6 17, 18 11,399 DU6-2 3/23/2017 6314037 2172459-32.9-37.0 A -32.9 to -37.0 Z -37.0 to -38.0 Surface (A) intervals; DU6-Z (Archive): DU6-1, DU6-2, and West Complex DU6-3 3/23/2017 6313652 2172688-32.8-37.0 A -32.8 to -37.0 Z -37.0 to -38.0 DU6-3 New Horizon (Z) intervals DU7-1 3/24/2017 6313176 2173109-32.9-37.0 A -32.9 to -37.0 Z -37.0 to -38.0 DU7-COMP: DU7-1 and DU7-2 Surface (A) intervals DU7 19, 19A 9,281 DU7-2 3/24/2017 6312861 2173464-33.5-37.0 A -33.5 to -37.0 Z -37.0 to -38.0 DU7-Z (Archive): DU7-1 and DU7-2 New Horizon (Z) intervals DU8-1 3/24/2017 6312434 2173941-33.0-37.0 A -33.0 to -37.0 Z -37.0 to -38.0 DU8-COMP: DU8-1 and DU8-2 Surface (A) intervals DU8 20 8,865 DU8-2 3/24/2017 6312232 2174186-33.7-37.0 A -33.7 to -37.0 Z -37.0 to -38.0 DU8-Z (Archive): DU8-1 and DU8-2 New Horizon (Z) intervals Notes: 1. Coordinates are in North American Datum of 1983, California State Plane Zone III, U.S. Feet. A: Surface sediment interval is the mudline elevation to the authorized dredge depth plus 2-foot overdredge MLLW: mean lower low water Z: New Horizon interval is an additional 1 foot below the Surface (A) interval Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 1 of 1 June 2017

Table 2 Dredge Management Placement Site Soil Collection Summary Port of Stockton DMPS Station ID X Coordinate 1,2 Y Coordinate 1, 2 Composite Samples Sample Interval 3 RI-1 6307920 2178240 RI1-COMP Roberts Island RI-2 6308821 2177436 RI2-COMP RI-3 6308054 2177473 RI3-COMP 0- to 2-feet RRI-1 6318723 2167826 RRI1-COMP Rough and Ready RRI-2 6318842 2168038 RRI2-COMP Island RRI-3 6318984 2168292 RRI3-COMP Notes: 1. Coordinates are in North American Datum of 1983, California State Plane Zone III, U.S. Feet. 2. Coordinates are the centroid of the three sampling locations to form each composite sample. 3. Three representative 0- to 2-foot soil samples were combined and homogenized to form three composite samples from each DMPS. DMPS: dredge material placement site Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 1 of 1 June 2017

Table 3 Sample Inventory Sample Notes: Total DI-WET: deionized water waste extraction test DOC: dissolved organic carbon PAH: polycyclic aromatic hydrocarbon TDS: total dissolved solids TPH: total petroleum hydrocarbons Hexavalent Geotech: Grain Size/ Bulk Density/ Samples Delivered to Laboratory Ammonia and Total Solids/ Total Organic ph and Cation Exchange Tier 2 analyses were triggered on "new horizon" samples based on Probable Effects Level screening level criteria exceedances in the composite sample DI-WET (Metals, DOC, Chemistry Bioassay Alkalinity Matrix Sample ID Metals Chromium PAHs TPH Moisture Content Sulfide Carbon Capacity TDS, ph) Archive Archive (CaCO3) RI1-COMP X X X X X X X X X X -- -- RI2-COMP X X X X X X X X X X -- -- Soil RI3-COMP X X X X X X X X X X -- -- RRI1-COMP X X X X X X X X X X -- -- RRI2-COMP X X X X X X X X X X -- -- RRI3-COMP X X X X X X X X X X -- -- DU1-COMP X X X X X X X X X X -- -- DU1-Z -- -- -- -- -- -- -- -- -- X X -- DU2-COMP X X X X X X X X X X -- -- DU2-Z -- -- Tier 2 -- -- -- -- -- -- X X -- DU3-COMP X X X X X X X X X X -- -- DU3-Z Tier 2 -- -- -- -- -- -- -- -- X X -- DU4-COMP X X X X X X X X X X -- -- Sediment DU4-Z -- -- Tier 2 -- -- -- -- -- -- X X -- DU5-COMP X X X X X X X X X X -- -- DU5-Z -- -- Tier 2 -- -- -- -- -- -- X X -- DU6-COMP X X X X X X X X X X -- -- DU6-Z -- -- -- -- -- -- -- -- -- X X -- DU7-COMP X X X X X X X X X X -- -- DU7-Z Tier 2 -- -- -- -- -- -- -- -- X X -- DU8-COMP X X X X X X X X X X -- -- DU8-Z Tier 2 -- -- -- -- -- -- -- -- X X -- Surface Water DU-SITEWATER -- -- -- -- -- -- -- -- -- -- -- X Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 1 of 1 June 2017

Table 4 Sediment Results Sample ID DU1-COMP_20170323 DU2-COMP_20170322 DU3-COMP_20170321 DU4-COMP_20170321 DU5-COMP_20170322 DU6-COMP_20170323 DU7-COMP_20170324 DU8-COMP_20170324 Sample Type Dredge Material Dredge Material Dredge Material Dredge Material Dredge Material Dredge Material Dredge Material Dredge Material Sample Date 3/23/2017 3/22/2017 3/21/2017 3/21/2017 3/22/2017 3/23/2017 3/24/2017 3/24/2017 Depth Probable Upland See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 Matrix Effects Level Disposal SE SE SE SE SE SE SE SE Analytes Method (Freshwater) 1 Criteria 2 Conventional Parameters (mg/kg) Ammonia as nitrogen SM4500NH3 23 20 66 25 17 5.3 24 21 Sulfide E376.2 110 140 33 29 51 29 35 45 Conventional Parameters (pct) Moisture (water) content D2216 55 55 39 35 41 32 39 44 Total organic carbon SW9060A 1.3 1.7 1.1 1.4 0.86 0.47 0.89 1.3 Total solids SM2540B 43.6 43.9 61.5 66.6 60.2 68.1 59.7 55.6 Conventional Parameters (su) ph SW9045C 7.02 7.18 7.13 7.14 7.41 7.13 7.32 7.26 Grain Size (pct) Total Gravel D4464M 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U Total Sand D4464M 36.9 17.14 51.86 79.17 58.57 88.25 70.02 49 Total Silt D4464M 51.96 66.59 39.72 17.29 34.71 9.66 25 43.01 Total Fines (silt + clay) D4464M 63.1 82.87 48.14 20.84 41.43 11.77 29.99 50.98 Total Clay D4464M 11.14 16.28 8.42 3.55 6.72 2.11 4.99 7.97 Metals (meq/100g) Sodium SW9081 71.9 79.9 37.2 21.3 34.5 24.1 180 161 Metals (mg/kg) Aluminum SW6020 14400 25300 18400 10500 13500 8360 15900 15400 Arsenic SW6020 17 11.6 4.59 7.38 6.9 3.85 5.26 2.83 6.18 5.98 Barium SW6020 132 213 174 106 136 97.8 164 165 Cadmium SW6020 3.53 21 0.497 1.08 3.83 0.364 0.445 0.292 0.565 0.538 Chromium SW6020 90 92.9 38.9 60.1 44.1 25.2 35.3 24.5 44.3 42.3 Chromium VI SW7196A 1.2 J 0.48 U 0.35 U 0.39 J 0.82 J 0.42 J 0.98 J 1.2 J Copper SW6020 197 61 38.6 64.5 44.5 85.4 27 20.1 49.8 39.4 Lead SW6020 91.3 400 16.8 23.2 23.6 7.63 13 7.09 35.6 13.8 Manganese SW6020 594 976 827 597 773 407 803 915 Mercury SW7471A 0.486 0.2 0.0648 0.0879 0.124 0.0463 0.131 0.0498 0.127 0.0913 Molybdenum SW6020 0.344 J 1.15 0.804 1.51 0.45 0.215 J 0.609 0.536 Nickel SW6020 36 64.5 33.5 53.9 43.6 26.4 35.5 24.5 41.7 41 Selenium SW6020 390 0.566 0.737 0.374 0.433 0.399 0.177 0.316 0.403 Zinc SW6020 315 120 104 157 224 64.8 82.7 50.8 110 108 Polycyclic Aromatic Hydrocarbons (µg/kg) 2-Methylnaphthalene SW8270CSIM 11 J 120 11 J 55 25 4 J 4.2 J 4.2 U Acenaphthene SW8270CSIM 88.9 3700000 16 J 170 65 150 190 7.1 J 36 18 Acenaphthylene SW8270CSIM 128 3.9 U 3.9 U 14 J 6.1 J 3 U 3.3 J 2.9 U 3.2 U Anthracene SW8270CSIM 245 22000000 32 94 61 72 100 12 J 19 21 Benzo(a)anthracene SW8270CSIM 385 620 48 79 83 88 64 18 30 31 Benzo(a)pyrene SW8270CSIM 782 62 41 70 53 64 25 12 J 21 17 J Benzo(b)fluoranthene SW8270CSIM 620 48 74 62 42 31 16 25 25 Benzo(g,h,i)perylene SW8270CSIM 43 44 37 39 2.6 U 9 J 15 J 14 J Benzo(k)fluoranthene SW8270CSIM 610 43 61 58 37 28 17 23 21 Chrysene SW8270CSIM 862 6100 71 100 120 130 67 41 45 65 Dibenzo(a,h)anthracene SW8270CSIM 135 62 14 J 15 J 14 J 24 3.3 U 3.4 J 6 J 3.8 J Fluoranthene SW8270CSIM 2355 2300000 86 220 270 270 510 98 130 120 Fluorene SW8270CSIM 144 2600000 6.9 U 96 42 120 220 11 J 34 19 Indeno(1,2,3-c,d)pyrene SW8270CSIM 620 34 39 33 25 10 J 8.6 J 16 J 12 J Naphthalene SW8270CSIM 391 56000 13 J 320 15 J 96 17 5 U 5.7 U 6.2 U Phenanthrene SW8270CSIM 515 66 390 370 390 510 61 39 44 Pyrene SW8270CSIM 875 2300000 130 240 230 260 390 87 120 120 Total cpah TEQ (7 minimum CAEPA 2005) (U = 1/2) 60.41 J 97.8 J 79.2 J 86.9 39.135 J 18.71 J 31.45 J 26.93 J Total PAH (16) (U = 1/2) 701.4 J 2134 J 1538 J 1868.1 J 2191.5 J 410.9 J 567.5 J 537.6 J Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 1 of 4 June 2017

Table 4 Sediment Results Sample ID Sample Type Sample Date Depth Matrix Probable Effects Level Upland Disposal Analytes Method (Freshwater) 1 Criteria 2 Conventional Parameters (mg/kg) Ammonia as nitrogen SM4500NH3 Sulfide E376.2 Conventional Parameters (pct) Moisture (water) content D2216 Total organic carbon SW9060A Total solids SM2540B Conventional Parameters (su) ph SW9045C Grain Size (pct) Total Gravel D4464M Total Sand D4464M Total Silt D4464M Total Fines (silt + clay) D4464M Total Clay D4464M Metals (meq/100g) Sodium SW9081 Metals (mg/kg) Aluminum SW6020 Arsenic SW6020 17 11.6 Barium SW6020 Cadmium SW6020 3.53 21 Chromium SW6020 90 92.9 Chromium VI SW7196A Copper SW6020 197 61 Lead SW6020 91.3 400 Manganese SW6020 Mercury SW7471A 0.486 0.2 Molybdenum SW6020 Nickel SW6020 36 64.5 Selenium SW6020 390 Zinc SW6020 315 120 Polycyclic Aromatic Hydrocarbons (µg/kg) 2-Methylnaphthalene SW8270CSIM Acenaphthene SW8270CSIM 88.9 3700000 Acenaphthylene SW8270CSIM 128 Anthracene SW8270CSIM 245 22000000 Benzo(a)anthracene SW8270CSIM 385 620 Benzo(a)pyrene SW8270CSIM 782 62 Benzo(b)fluoranthene SW8270CSIM 620 Benzo(g,h,i)perylene SW8270CSIM Benzo(k)fluoranthene SW8270CSIM 610 Chrysene SW8270CSIM 862 6100 Dibenzo(a,h)anthracene SW8270CSIM 135 62 Fluoranthene SW8270CSIM 2355 2300000 Fluorene SW8270CSIM 144 2600000 Indeno(1,2,3-c,d)pyrene SW8270CSIM 620 Naphthalene SW8270CSIM 391 56000 Phenanthrene SW8270CSIM 515 Pyrene SW8270CSIM 875 2300000 Total cpah TEQ (7 minimum CAEPA 2005) (U = 1/2) Total PAH (16) (U = 1/2) DU1-Z_20170323 DU2-Z_20170322 DU3-Z_20170321 DU4-Z_20170321 DU5-Z_20170322 DU6-Z_20170323 DU7-Z_20170324 DU8-Z_20170324 New Horizon New Horizon New Horizon New Horizon New Horizon New Horizon New Horizon New Horizon 3/23/2017 3/22/2017 3/21/2017 3/21/2017 3/22/2017 3/23/2017 3/24/2017 3/24/2017 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 SE SE SE SE SE SE SE SE -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 65.3 66.5 65.6 76.3 -- 65.9 67.2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 12900 13400 -- -- -- 11800 12700 -- 4.35 6.55 -- -- -- 5.9 6.37 -- 170 172 -- -- -- 172 157 -- 0.597 0.67 -- -- -- 0.46 0.446 -- 39.2 39.4 -- -- -- 45 39.7 -- -- -- -- -- -- -- -- -- 38.4 64.5 -- -- -- 41.3 41.9 -- 24.6 21 -- -- -- 16.5 14.2 -- 528 846 -- -- -- 556 611 -- -- -- -- -- -- -- -- -- 0.447 0.723 -- -- -- 0.417 0.501 -- 35.8 39.9 -- -- -- 40.3 38.6 -- 0.563 0.67 -- -- -- 0.371 0.423 -- 113 241 -- -- -- 113 109 -- 11 J -- 69 5 J -- -- -- -- 46 -- 28 120 -- -- -- -- 6.4 J -- 2.8 J 34 -- -- -- -- 20 -- 39 33 -- -- -- -- 37 -- 180 16 -- -- -- -- 30 -- 160 9.6 J -- -- -- -- 31 -- 58 12 J -- -- -- -- 30 -- 120 5.3 J -- -- -- -- 21 -- 76 7.4 J -- -- -- -- 54 -- 320 19 -- -- -- -- 9.2 J -- 91 2.6 J -- -- -- -- 98 -- 95 92 -- -- -- -- 12 J -- 26 110 -- -- -- -- 22 -- 64 4.1 J -- -- -- -- 33 -- 58 8.5 J -- -- -- -- 97 -- 140 220 -- -- -- -- 100 -- 170 76 -- -- -- -- 42.56 J -- 210.1 14 J -- -- -- -- 657.6 J -- 1696.8 J 774.5 J -- -- -- Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 3 of 4 June 2017

Table 4 Sediment Results Analytes Total Petroleum Hydrocarbons (mg/kg) Diesel range hydrocarbons Motor oil range hydrocarbons Notes: Sample ID Sample Type Sample Date Depth Matrix Method SW8015BM SW8015BM Probable Effects Level (Freshwater) 1 Upland Disposal Criteria 2 Detected concentration is greater than the Probable Effects Level (PEL) Detected concentration is greater than 2016 U.S. Army Corps of Engineers Notice of Intent Criteria Bold: Detected result 1. PELs are based on National Oceanic and Atmospheric Administration Screening Quick Reference Tables for screening benthic toxicity (2008). DU1-Z_20170323 DU2-Z_20170322 DU3-Z_20170321 DU4-Z_20170321 DU5-Z_20170322 DU6-Z_20170323 DU7-Z_20170324 DU8-Z_20170324 New Horizon New Horizon New Horizon New Horizon New Horizon New Horizon New Horizon New Horizon 3/23/2017 3/22/2017 3/21/2017 3/21/2017 3/22/2017 3/23/2017 3/24/2017 3/24/2017 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 SE SE SE SE SE SE SE SE -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 2. Criteria is based from Table A.3 in California Regional Water Quality Control Board Central Valley Region General Order No. R5-2004-0061-001. µg/kg: microgram per kilogram CAEPA: California Environmental Protection Agency cpah: carcinogenic polycyclic aromatic hydrocarbon J: Estimated value meq/100g: millequivalents per 100 grams mg/kg: milligram per kilogram PAH: polycyclic aromatic hydrocarbon pct: percent su: standard units TEQ: toxic equivalency U: Compound analyzed, but not detected above detection limit Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 4 of 4 June 2017

Table 5 Upland Soil Results Sample ID RI1-COMP_20170320 RI2-COMP_20170320 RI3-COMP_20170320 RRI1-COMP_20170320 RRI2-COMP_20170320 RRI3-COMP_20170320 Sample Type DMPS DMPS DMPS DMPS DMPS DMPS Sample Date 3/20/2017 3/20/2017 3/20/2017 3/20/2017 3/20/2017 3/20/2017 Depth Probable Upland 0-2 feet 0-2 feet 0-2 feet 0-2 feet 0-2 feet 0-2 feet Matrix Effects Level Disposal SO SO SO SO SO SO Analytes Conventional Parameters (mg/kg) Method (Freshwater) 1 Criteria 2 Ammonia as nitrogen SM4500NH3 2.2 1.3 1.5 4.3 0.59 0.38 Sulfide E376.2 0.54 U 0.46 U 0.67 0.62 0.41 U 0.53 U Conventional Parameters (pct) Moisture (water) content D2216 28 15 25 20 5.8 26 Total organic carbon SW9060A 0.81 0.19 0.5 0.18 0.018 U 0.62 Total solids SM2540B 71.3 83.8 74.5 81.2 94.5 72.8 Conventional Parameters (su) ph SW9045C 5.44 6.95 6.01 6.79 6.97 8.25 Grain Size (pct) Total Gravel D4464M 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U 0.01 U Total Sand D4464M 19.66 88.31 49.44 89.6 97.83 58.96 Total Silt D4464M 65.25 9.48 42.19 8.7 1.77 32.2 Total Fines (silt + clay) D4464M 80.33 11.69 50.56 10.4 2.16 41.04 Total Clay D4464M 15.08 2.21 8.37 1.7 0.39 8.84 Metals (meq/100g) Sodium SW9081 64.6 26.5 49.3 12.4 5.48 40.6 Metals (mg/kg) Aluminum SW6020 23800 9750 19800 7570 4180 16100 Arsenic SW6020 17 11.6 9.42 3.8 7.19 3.53 2.8 5.03 Barium SW6020 251 99.8 210 77.8 45.3 135 Cadmium SW6020 3.53 21 0.406 0.123 0.277 0.155 0.0699 J 0.134 J Chromium SW6020 90 92.9 73.5 35.8 59.4 26.3 19.9 44.3 Chromium VI SW7196 0.3 U 0.4 J 0.29 U 0.27 U 0.23 U 0.3 U Copper SW6020 197 61 60 20.8 47.6 35.7 9.72 25.9 Lead SW6020 91.3 400 32.3 10.8 16.4 9.02 3.37 6.82 Manganese SW6020 924 472 989 631 215 472 Mercury SW7471A 0.486 0.2 0.163 0.0718 0.107 0.112 0.11 0.0506 Molybdenum SW6020 0.763 0.323 0.755 1.08 0.155 U 0.44 Nickel SW6020 36 64.5 54.9 26.2 48 24.3 20.8 36.1 Selenium SW6020 390 0.102 U 0.0872 U 0.0981 U 0.09 U 0.0773 U 0.1 U Zinc SW6020 315 120 137 54.1 102 57.8 27.5 69.2 Polycyclic Aromatic Hydrocarbons (µg/kg) 2-Methylnaphthalene SW8270CSIM 8.8 J 2.8 U 5 J 7.1 J 2.4 U 3.2 U Acenaphthene SW8270CSIM 88.9 3700000 25 8.2 J 7.4 J 25 2.5 U 3.2 U Acenaphthylene SW8270CSIM 128 6.3 J 2.1 U 2.5 J 2.2 U 1.9 U 2.5 U Anthracene SW8270CSIM 245 22000000 48 7.9 J 9.1 J 22 3.6 U 4.8 U Benzo(a)anthracene SW8270CSIM 385 620 82 16 15 29 2.3 U 3 U Benzo(a)pyrene SW8270CSIM 782 62 39 16 13 J 17 1.9 U 2.5 U Benzo(b)fluoranthene SW8270CSIM 620 56 19 19 15 2.9 U 3.8 U Benzo(g,h,i)perylene SW8270CSIM 22 12 J 17 9.1 J 1.6 U 2.1 U Benzo(k)fluoranthene SW8270CSIM 610 48 17 14 24 2.9 U 3.8 U Chrysene SW8270CSIM 862 6100 100 27 26 39 2.3 U 3.1 U Dibenzo(a,h)anthracene SW8270CSIM 135 62 9.1 J 4.1 J 6.9 J 3.8 J 2 U 2.7 U Fluoranthene SW8270CSIM 2355 2300000 360 36 46 100 2.1 J 2.5 U Fluorene SW8270CSIM 144 2600000 29 5.4 J 8.8 J 18 3.3 U 4.3 U Indeno(1,2,3-c,d)pyrene SW8270CSIM 620 20 10 J 14 8.9 J 1.7 U 2.2 U Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 1 of 2 June 2017

Table 6 DI-WET Results Sample ID DU1-COMP_20170323 DU2-COMP_20170322 DU3-COMP_20170321 DU4-COMP_20170321 DU5-COMP_20170322 DU6-COMP_20170323 DU7-COMP_20170324 Sample Type Dredge Material Dredge Material Dredge Material Dredge Material Dredge Material Dredge Material Dredge Material Sample Date 3/23/2017 3/22/2017 3/21/2017 3/21/2017 3/22/2017 3/23/2017 3/24/2017 Depth Upland See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 See Table 1 Matrix Disposal Leachate Leachate Leachate Leachate Leachate Leachate Leachate Analytes Method Criteria 1 Conventional Parameters, Dissolved (mg/l) Dissolved organic carbon SM5310B 4.7 6.9 6.8 3.8 3.4 2.6 3.4 Total dissolved solids SM2540C 2320 3920 1480 1230 535 1800 770 Conventional Parameters (su) ph SW9040 6.91 7.01 -- -- 6.76 6.8 7.04 Metals (DI-WET) (µg/l) Aluminum SW6010B 2980 3810 3170 819 649 2510 11200 Arsenic SW6010B 10 2.61 4.31 6.1 5.34 4.44 6.87 6.85 Barium SW6010B 100 29.6 U 30.9 J 40 J 43.1 J 55.4 J 29.6 U 69.7 J Cadmium SW6010B 5 0.014 U 0.018 J 0.032 J 3.037 0.029 J 0.039 J 0.038 J Chromium SW6010B 50 6.79 7.38 10.19 0.84 11.1 12.52 12.68 Copper SW6010B 9 11.68 10.81 14.36 37.65 13.85 24.55 23.45 Lead SW6010B 2.5 3.731 3.299 5.739 0.926 5.785 6.449 7.708 Manganese SW6010B 27 U 140 88.8 766 327 27 U 313 Mercury SW7470A 0.05 0.00075 J 0.00189 J 0.00248 J 0.0003 U 0.00244 J 0.00396 0.00195 J Molybdenum SW6010B 27.8 U 31 J 27.8 U 27.8 U 27.8 U 27.8 U 27.8 U Nickel SW6010B 52 7.21 6.45 8.92 182.03 9.89 10.15 11.53 Selenium SW6010B 5 1.4 J 2.2 1.6 J 0.9 J 1.8 J 2 J 1.5 J Zinc SW6010B 100 17.43 13.77 19.94 483.78 17.92 17.52 27.3 Metals (µg/l) Chromium VI SW7196A 11 4 U 4 U 4 U 4 U 4 U 4 U 4 U Notes: Detected concentration is greater than 2016 U.S. Army Corps of Engineers Notice of Intent Criteria Bold: Detected result 1. Criteria is based from Table A.3 in California Regional Water Quality Control Board Central Valley Region General Order No. R5-2004-0061-001. µg/l: microgram per liter DI-WET: Deionized Water Waste Extraction Test DMPS: dredge material placement site J: Estimated value mg/l: milligram per liter su: standard units U: Compound analyzed, but not detected above detection limit Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 1 of 2 June 2017

Table 6 DI-WET Results Sample ID Sample Type Sample Date Depth Upland Matrix Disposal Analytes Method Criteria 1 Conventional Parameters, Dissolved (mg/l) Dissolved organic carbon SM5310B Total dissolved solids SM2540C Conventional Parameters (su) ph SW9040 Metals (DI-WET) (µg/l) Aluminum SW6010B Arsenic SW6010B 10 Barium SW6010B 100 Cadmium SW6010B 5 Chromium SW6010B 50 Copper SW6010B 9 Lead SW6010B 2.5 Manganese SW6010B Mercury SW7470A 0.05 Molybdenum SW6010B Nickel SW6010B 52 Selenium SW6010B 5 Zinc SW6010B 100 Metals (µg/l) Chromium VI SW7196A 11 Notes: Detected concentration is greater than 2016 U.S. Army Corps of Engineers Notice of Intent Criteria Bold: Detected result 1. Criteria is based from Table A.3 in California Regional Water Quality Control Board Central Valley Region General Order No. R5-2004-0061-001. DU8-COMP_20170324 RI1-COMP_20170320 RI2-COMP_20170320 RI3-COMP_20170320 RRI1-COMP_20170320 RRI2-COMP_20170320 RRI3-COMP_20170320 Dredge Material DMPS DMPS DMPS DMPS DMPS DMPS 3/24/2017 3/20/2017 3/20/2017 3/20/2017 3/20/2017 3/20/2017 3/20/2017 See Table 1 0-2 feet 0-2 feet 0-2 feet 0-2 feet 0-2 feet 0-2 feet Leachate Leachate Leachate Leachate Leachate Leachate Leachate 3.2 1.8 2.9 4.2 1.5 0.32 J 3.2 520 1330 2340 2260 460 465 3740 6.09 5.72 6.19 5.8 6.62 7.12 8.58 5840 804 18600 13900 124 U 2520 18900 4.19 3.55 6 3.9 2.72 5.7 24.21 55.4 J 69 J 80.9 J 78.3 J 29.6 U 36.3 J 64.6 J 0.014 U 0.096 0.025 J 0.055 0.014 U 0.014 U 0.2 8.44 12.1 14.36 14.25 1.83 9.09 63.45 14.01 11.95 15.27 15.61 3.7 5.92 35.95 3.976 5.045 16.905 3.887 0.417 3.319 13.1 583 235 127 78.6 571 55.6 99.5 0.0018 J 0.00275 0.013 0.00635 0.00703 0.00494 0.118 27.8 U 27.8 U 27.8 U 27.8 U 27.8 U 27.8 U 27.8 U 8.31 14.28 12.12 15.01 7 8.46 53.06 1.5 J 0.4 U 1.2 J 0.9 J 1.4 J 2.8 4.3 16.97 41.95 23.92 32.13 2.75 8.76 71.32 4 U 4 U 4 U 4 U 4 U 6.4 J 4 U µg/l: microgram per liter DI-WET: Deionized Water Waste Extraction Test DMPS: dredge material placement site J: Estimated value mg/l: milligram per liter su: standard units U: Compound analyzed, but not detected above detection limit Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 2 of 2 June 2017

Table 7 Surface Water Result DU-SITEWATER_20170324 Surface Water 3/24/2017 0-1 feet WS Analyte Method Conventional Parameters (mg/l) Hardness as CaCO3 SM2340C 40 Notes: Bold: Detected result CaCO3: calcium carbonate mg/l: milligram per liter Sample ID Sample Type Sample Date Depth Matrix Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization Page 1 of 1 June 2017

Figures

Sacramento ^! Stockton San Francisco!!( 2 Stockton Roberts Island Bu rns San Joaquin River/Stockton DWSC Cutoff!( 20 19A!( 19!( Stockton 18!( 17!(!( 16 15!( 14!( 5 5 Rough and Ready Island/ West Complex 11 10 9!(!(!( 12 & 13!( 6 5 4!(!(!( 7 & 8!( 2 & 3!( San Joaquin River East Complex LEGEND:!( Dock Location and Designation Potential Dredge Material Placement Sites!( 1 Rough and Ready Island Dredge Material Placement Site!( 2 Roberts Island Dredge Material Placement Site!( 1 San Joa q uin River Publish Date: 2017/06/08, 11:41 AM User: jsfox Filepath: \\orcas\gis\jobs\port_of_stockton_0377\maps\noi\sitevicinitymap.mxd [ 0 4,000 Feet Figure 1 Port of Stockton Docks and Dredge Material Placement Sites Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization

DOCK 14 DU8-2!< DU8-1!< DOCK DOCK 20 20 DOCK 19A DU8 DU8 DU7 DU7-2 DOCK 19A!< LEGEND:!< Sediment Core Locations Dredge Unit Dock Boundary Lines Dock Area Bathymetry (2016/2017) Elevation in feet (MLLW) -53.6 - -42-41.9 - -40-39.9 - -37-36.9 - -35-34.9 - -33-32.9 - -7.9 DU7 DU7-1!< DOCK DOCK 19 19 DU6-3!< DOCK 18 San Joaquin River NOTES: Horizontal Datum: NAD 83 California State Plane Zone III (ft.) Vertical Datum: Mean Lower Low Water (MLLW) Aerial image provided by ESRI and their partners. DU6-2!< DU6 DOCK 17 DU6-1!< DU5-3!< DOCK 16 [ 0 500 Feet Rough and Ready Island DU5-2!< DOCK 15 DU5 DU5-1!< Publish Date: 2017/06/08, 1:17 PM User: jsfox Filepath: \\orcas\gis\jobs\port_of_stockton_0377\maps\noi\dredgeareasamplelocations.mxd Figure 2a West Complex Actual Coring Locations Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization

5 5 LEGEND:!< Sediment Core Locations Dredge Unit Dock Boundary Lines Dock Area Bathymetry (2016/2017) Elevation in feet (MLLW) -53.6 - -42-41.9 - -40-39.9 - -37-36.9 - -35-34.9 - -33-32.9 - -7.9!< DOCK 12 & 13 DOCK 12 & 13 DU4 DU4 DU4-1!< San Joaquin River DOCK 10 DOCK 11 DOCK 10 DU3-2 DOCK 9 DU3!<!< DOCK DOCK 7 & 8!< DOCK 6 DOCK 5 DU2-3 DU3-1 DOCK 4 DOCK 5 DOCK 4 DU2-2 DU2!< DU2-1 DU1-2!< DOCK DOCK 2 & 3 DU1 DU1!< DU1-1 NOTES: Horizontal Datum: NAD 83 California State Plane Zone III (ft.) Vertical Datum: Mean Lower Low Water (MLLW) Aerial image provided by ESRI and their partners. DU4-2!< [ 0 500 Port of Stockton Feet Publish Date: 2017/06/08, 1:17 PM User: jsfox Filepath: \\orcas\gis\jobs\port_of_stockton_0377\maps\noi\dredgeareasamplelocations.mxd Figure 2b East Complex Actual Coring Locations Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization

LEGEND:!. Upland DMPS Composite Sample Potential Dredge Material Placement Sites San San Joaquin Joaquin River River NOTES: Horizontal Datum: NAD 83 California State Plane Zone III (ft.) Vertical Datum: Mean Lower Low Water (MLLW) Aerial image provided by ESRI and their partners. Roberts Island DMPS RI-1!. RI-3!. RI-2!. [ 0 980 Feet Publish Date: 2017/06/08, 1:09 PM User: jsfox Filepath: \\orcas\gis\jobs\port_of_stockton_0377\maps\noi\uplanddmplocations.mxd Figure 3a Roberts Island Dredge Material Placement Site Sample Locations Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization

RRI-3!. LEGEND:!. Upland DMPS Composite Sample Potential Dredge Material Placement Sites RRI-2!. RRI-1!. NOTES: Horizontal Datum: NAD 83 California State Plane Zone III (ft.) Vertical Datum: Mean Lower Low Water (MLLW) Aerial image provided by ESRI and their partners. Rough and Ready Island DMPS San Joaquin River [ 0 360 Feet Burns Burns Cutoff Cutoff Publish Date: 2017/06/08, 1:09 PM User: jsfox Filepath: \\orcas\gis\jobs\port_of_stockton_0377\maps\noi\uplanddmplocations.mxd Figure 3b Rough and Ready Island Dredge Material Placement Site Sample Locations Notice of Intent Port of Stockton 2017-2021 Maintenance Dredging Sediment Characterization