B.08 LCR Sediment Characterizations 2016 Port of Longview.pdf

January 2017 Port of Longview Maintenance Dredging Project

Sediment Characterization Report

Prepared for the Port of Longview

January 2017 Port of Longview Maintenance Dredging Project

Sediment Characterization Report

Prepared for Port of Longview 10 East Port Way Longview, Washington 98632

Prepared by Anchor QEA, LLC 6650 SW Redwood Lane, Suite 333 Portland, Oregon 97224

Sediment Characterization Report i January 2017

TABLE OF CONTENTS

1 Introduction

1.1 Project Setting

1.2 Project Purpose

2 Project Description

2.1 Berth and Willow Grove Maintenance

2.2 Proposed Dredged Material Placement Options

2.2.1 In-River Flow Lane Disposal

2.2.2 Upland Placement

2.2.3 Beneficial Use

2.3 General Construction Methods

2.4 Schedule

3 Field Sampling Program

3.1 Site Ranking

3.2 Dredged Material Management Units

3.3 Sediment Grab Sample Locations and Depths

3.4 Sediment Compositing Scheme

3.5 Deviations from the Sampling and Analysis Plan

4 Geological and Physical Analysis

4.1 Geological Description

4.2 Physical Parameters

4.3 Physical Analytical Results

5 Chemical Analysis

5.1 Chemical Analytical Parameters

5.2 Data Quality Review

5.3 Chemical Analytical Results

5.3.1 Comparison to Sediment Evaluation Framework Screening Levels

5.3.2 Comparison to Model Toxics Control Act Upland Soil Criteria

6 Conclusions

7 References

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TABLES

Table 1 Dredged Material Screening Criteria Table 2 Sediment Sample Locations, Depths, and Elevations Table 3 Sample Compositing Scheme Table 4 Sediment Physical and Chemical Analytical Results Table 5 Data Validation Results

FIGURES

Figures 1 Vicinity Map Figures 2a-c Sediment Sample Locations Figure 3a Berth Sections Figure 3b Willow Grove Boat Launch Sections

APPENDICES

Appendix A Grab Sample Logs Appendix B Data Validation Review Report – EPA Level 2B Appendix C Laboratory Certificates of Analysis

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ABBREVIATIONS

ARI Analytical Resources Incorporated CRD Columbia River Datum CRCIP Columbia River Channel Improvement Project cy cubic yards DMMU Dredged Material Management Unit EGT Export Grain Terminal MTCA Model Toxics Control Act PAH polycyclic aromatic hydrocarbon PCB polychlorinated biphenyl PSET Portland Sediment Evaluation Team Port Port of Longview QC quality control RM river mile SAP Sampling and Analysis Plan SCR Sediment Characterization Report SEF Sediment Evaluation Framework for the Pacific Northwest SL screening level SVOC semivolatile organic compound TBT tributyltin TOC total organic carbon USACE U.S. Army Corps of Engineers USEPA U.S. Environmental Protection Agency

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1 Introduction This Sediment Characterization Report (SCR) describes the sediment collection procedures and physical and chemical testing results for sediments from the Port of Longview (Port) berthing areas at River Mile (RM) 66 and at the Willow Grove Park Boat Basin at RM 60 on the north bank of the Columbia River. The Port conducts maintenance dredging to maintain its shipping berths at -43+2 feet Columbia River Datum (CRD) at berths that have previously been deepened, and -40+2 feet CRD at berths that have not yet been deepened. The Willow Grove Boat Basin will be maintained at the previously authorized depth of -6.3 feet CRD. The Project will facilitate safe access to the Port berths from the federal navigation channel and continued use of the Willow Grove Park Boat Launch as a public recreational boating facility.

The work described in this SCR was performed according to the requirements of the Sediment Evaluation Framework for the Pacific Northwest (SEF; USACE et al. 2016), administered by the Portland Sediment Evaluation Team (PSET), and the Sampling and Analysis Plan (SAP; Port of Longview 2016) that was prepared for this project and approved by PSET on September 16, 2016. This SCR provides an analysis of representative sediment quality in the dredge prism at the Port berthing areas and Willow Grove Boat Basin. The physical and chemical testing results presented in this report will be used to support a suitability determination for flow lane disposal of the dredged material in the Columbia River or, alternatively, placement of the dredged material at a separately permitted upland placement site.

1.1 Project Setting

The Port is located at 10 Port Way in Longview, Washington, in Cowlitz County, Sections 8 and 9, Township 7N, Range 2W (Figure 1). The Port has been operating since 1921 and today manages eight marine terminals and approximately 6,000 linear feet of waterfront industrial property at Columbia RM 66. The Port primarily handles dry bulk and breakbulk cargoes. Dry bulk cargo— including minerals, chemicals, fertilizers, animal feeds, and grains—is handled at Berths 1, 2, 5, and 7.

Breakbulk cargo—forest products, steel, and over-dimensional and heavy-lift cargo for large-scale industrial projects—is handled at Berths 6, 7, and 8. There is no Berth 3 at the Port, and Berth 4 is a layberth used intermittently. Berth 9 is leased by Export Grain Terminal (EGT).

Willow Grove Park is located at 7141 Willow Grove Road in Longview, Washington, in Cowlitz County, Section 17, Township 8N, Range 2W (Figure 1). The Park has been open for public use since 1991, and was recently acquired by the Port for continued use for public recreation and access to the Columbia River Shoreline. The Willow Grove Boat Basin is located at Columbia RM 60.

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1.2 Project Purpose

The Columbia River Channel Improvement Project (CRCIP) was completed in 2010, resulting in an authorized depth of -43 feet CRD in the federal navigation channel. The Port was one of the sponsor ports for the CRCIP. As a result of the CRCIP, deeper draft vessels are now able to navigate through the Columbia River. The purpose of the Port’s maintenance dredging program is to provide unrestricted movement and safe access for various types of shipping vessels, including deep-draft vessels, to the Port’s berthing and marine support facilities. This will help the Port to competitively bid and secure marine trade opportunities domestically and overseas.

The Port acquired Willow Grove Park and the Willow Grove Boat Basin from Cowlitz County in 2016.

The boat basin was dredged in 2008 and has since seen a large amount of sediment accumulation, rendering some floats and ramps unusable at low water. The maintenance dredging project will return the boat basin to full service capacity for public use.

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2 Project Description

2.1 Berth and Willow Grove Maintenance

This project is to maintain the Port’s berths at their authorized elevations of -40 feet CRD and -43 feet CRD; and the Willow Grove Boat Basin at -6.3 feet CRD. Maintenance dredging would be conducted on an as-needed basis; maintenance dredging frequencies and volumes can vary considerably as a result of the changing sediment dynamics in the river. The Port is authorized for 2 feet of allowable advance dredging, also known as overdredging.

Specifically, the Port proposes to conduct the following actions:

Perform maintenance dredging to a depth of -43+2 feet CRD at Berths 1, 2, 4, 5, 8, and 9, and to a depth of -40+2 feet CRD at Berths 6 and 7

Perform maintenance dredging to a depth of -6.3 feet CRD at the Willow Grove Boat Basin Place dredged material from maintenance operations at approved in-water or upland placement sites, to be determined in consultation with the U.S. Army Corps of Engineers

(USACE).

Figures 2a and 2b show the layout and dimensions of the proposed dredge prism at the Port’s Berths 1 through 9. Figure 2c shows the Willow Grove Boat Basin, all of which lies within the dredge prism.

Figure 3a shows cross sections of the dredge prism at the Port’s berths. Figure 3b shows cross sections of the dredge prism at the Willow Grove Boat Basin.

2.2 Proposed Dredged Material Placement Options

The chemical analytical results presented in this SCR will determine the suitability of dredged material for in-river placement, upland placement, or other beneficial use. The criteria used to evaluate the dredged material are summarized in Table 1. In particular, the suitability for in-river placement is being evaluated using SEF screening levels (SLs), and the suitability for upland placement or beneficial use is being evaluated using Model Toxics Control Act (MTCA) soil quality standards for humans and ecological receptors, in both unrestricted and industrial applications (Ecology 2013).

2.2.1 In-River Flow Lane Disposal

The preferred placement option for the dredged material removed from the Port’s berths and Willow Grove Boat Basin is to place the material at an open-water flow lane site in the Columbia River. As a secondary option, upland placement may occur following an update to the Port’s permits. In-water placement of the dredged material is intended to enhance natural sediment transport and habitat formation processes in the river and estuary. A location off of Barlow Point has been used in the past.

For those dredged material management units (DMMUs) that are deemed suitable for flow lane

Sediment Characterization Report 4 January 2017 disposal, the Port will coordinate with USACE to identify a suitable placement location for future disposal. Off-channel areas greater than -50 feet CRD are preferred.

2.2.2 Upland Placement

As an alternative to flow lane disposal, or if chemical concentrations are not suitable for in-water placement, the dredged material could be placed on Port property at an upland stockpile area, potentially including areas east of the Wind Tower Road gated entrance, within the EGT rail loop track, or on the Barlow Point property. All sites would require permitting and review by state and local agencies. Dredged sediments would be dewatered through barge scuppers, offloaded at one of the Port’s berths, loaded onto trucks, and transported to the stockpile area. If temporary stockpiling on the shoreline becomes necessary, appropriate best management practices would be implemented to prevent the dredged material from re-entering the river.

2.2.3 Beneficial Use

The suitability of the dredged material for beneficial use will be evaluated using upland soil criteria or aquatic criteria, depending on the intended application. Possible beneficial use options could include structural fill for industrial applications; topsoil, upland, or aquatic habitat material; and other potential uses. Beneficial use of dredged material would be coordinated with the USACE, Washington State Department of Ecology, and PSET.

2.3 General Construction Methods

The anticipated construction methods may be described in general terms; however, the construction specifications will likely be performance-based, such that the contractor will select the specific equipment and construction methods that will achieve project objectives in the most efficient and cost-effective manner. It is anticipated that mechanical dredging will be performed using a clamshell bucket.

The preferred in-river flow lane disposal option is to load the dredged sediment into a bottom-dump barge, which is transported directly to the flow lane disposal site. Alternatively, the dredged sediment may be placed on a barge, dewatered through barge scuppers, transferred onto a dock or directly into trucks, and hauled to an upland placement or rehandling site on Port property.

2.4 Schedule

At the Port berths, approximately 42,900 cubic yards (cy) of materials were removed in 2016. The removal of materials at the Port’s berths occurred over 12 days between November 7 and 29, 2016.

The average production rate during this event was 3,575 cy a day. Future maintenance dredging at Port berths will be conducted on an as-needed basis.

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At the Willow Grove Boat Basin, approximately 4,415 cy of material was removed in 2016. The removal of material in the Willow Grove Boat Basin occurred over 5 days between November 29 and December 3, 2016. The average production rate was 883 cy of material a day. Future maintenance dredging at the Willow Grove Boat Basin will be conducted on an as-needed basis, but it is expected to be needed less frequently than at the Port’s berths.

Future proposed work would be performed during the designated in-water work periods to minimize construction impacts to sensitive fish species and aquatic life. Specific in-water work periods are established as part of the permitting process for this project.

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3 Field Sampling Program This section provides a summary of the field sampling program, including the following:

• Site ranking

• DMMUs

• Sediment grab locations and depths

• Sediment compositing scheme

• Deviations from the SAP

3.1 Site Ranking

The dredged material in the Port berthing areas was classified as a “low” rank and the Willow Grove Boat Basin was classified as a “very low” rank in the approved SAP. Chemical analytical results supporting these ranking determinations are discussed further in Section 5. In addition, sediment below -45 feet CRD is likely undisturbed, native material.

3.2 Dredged Material Management Units

The 2016 dredge prism at the Port berths, as shown on Figures 2a and 2b, extends from the face of the berthing areas to the federal navigation channel. However, the observed prism of accumulated sediment is concentrated at the berth face and does not extend to the navigation channel at all berths. Cross sections of the dredge prism at the Port berths are shown in Figure 3a. The dredge prism at the Willow Grove Boat Basin, as shown on Figure 2c, is considered to be the entirety of the basin. Cross sections of the dredge prism at the Willow Grove Boat Basin are shown in Figure 3b. For sediment characterization purposes, the dredge prism at the Port berths is divided into four DMMUs:

DMMU-1 (Berths 1, 2, 4, and 5), DMMU-2 (Berths 6 and 7), DMMU-3 (Berth 8), and DMMU-4 (Berth 9). The dredge prism at the Willow Grove Boat Basin is represented by one DMMU: DMMU-5. The various DMMUs were characterized using representative sediment grab samples, as summarized in Table 2.

3.3 Sediment Grab Sample Locations and Depths

One to four grab samples were collected from each DMMU to obtain representative coverage for sediment characterization purposes. The grabs were distributed systematically throughout each DMMU, with particular emphasis on shoal areas that contain the largest volume of dredged material.

Four grabs were taken in DMMU-1, three grabs were taken in DMMU-2, two grabs were taken in DMMU-3 and DMMU-5 (Willow Grove Boat Basin), and one grab was taken in DMMU-4.

Gravity Consulting was subcontracted to perform the power grab sampling work. DMMU-2, DMMU-3, DMMU-4, and DMMU-5 were sampled by Gravity Consulting on October 11, 2016. Due to vessel obstructions in Berths 2 and 5, the sampling of DMMU-1 was completed on October 12, 2016.

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For all events, Anchor QEA provided a field crew to oversee sampling operations and to log and process the grab samples for submission to the analytical laboratory.

Proposed versus actual sampling locations at the Port’s berths are shown on Figures 2a and 2b, and at the Willow Grove Boat Basin on Figure 2c. The coordinates of the actual grab locations, sampling date and time, mudline elevations, and recovery depths are compiled in Table 3. All grabs were initiated at the mudline and recovered between 5.5 and 9.0 inches (14 to 23 centimeters) of sediment. Due to obstructions by a berthed vessel, grab sample location POL-B2 had to be shifted approximately 250 feet to the east of the proposed location. In the Willow Grove Boat Basin, POL-WGS had to be shifted approximately 15 feet to the northeast since the proposed location was above water. These deviations are described in more detail in Section 3.5.

3.4 Sediment Compositing Scheme

At the Port’s Berths 1, 2, 4, 5, 8, and 9, the DMMUs were vertically stratified according to the following intervals (Table 2):

• A-Interval: Mudline to -45 feet CRD. The first interval extends from the mudline to the Port’s authorized maintenance dredging depth of -43 feet CRD, the currently authorized depth, plus 2 feet of overdepth to a final elevation of -45 feet CRD.

• Z-Interval: -45 feet CRD and below. Sampling not necessary due to low ranking.

At the Port’s Berths 6 and 7, the DMMUs were vertically stratified according to the following intervals (Table 2):

• A-Interval: Mudline to -42 feet CRD. The first interval extends from the mudline to the Port’s authorized maintenance dredging depth of -40 feet CRD, plus 2 feet of overdepth to a final elevation of -42 feet CRD.

• Z-Interval: -42 feet CRD and below. Sampling not necessary due to low ranking.

At Willow Grove Boat Basin, the DMMU was vertically stratified according to the following intervals (Table 2):

• A-Interval: Mudline to -6.3 feet CRD. The first interval extends from the mudline to the Port’s authorized maintenance dredging depth of -6.3 feet CRD.

• Z-Interval: -6.3 feet CRD and below. Sampling not necessary due to very low ranking.

Compositing was performed within the A-Interval. Composite samples were prepared by combining and homogenizing material from the one to four grab samples within each DMMU (Table 3).

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3.5 Deviations from the Sampling and Analysis Plan

Three deviations from the SAP were required to accommodate vessel obstructions, low water levels, and changed mudline elevations. These deviations are described below. The deviations related to vessel obstructions and low water levels are shown in Figures 2a and 2c. In all, 17 attempts were required to collect 12 usable grab samples. None of the deviations are expected to cause any significant impacts to project objectives, and representative samples of the DMMUs were obtained in all cases with the noted modifications.

• POL-B2 Offset. Sample location POL-B2 was relocated approximately 250 feet upstream of the proposed location due to a vessel obstruction. This change in location was discussed with and approved by James Holm at USACE on October 12, 2016.

• POL-WGS Offset. Sample location POL-WGS was relocated approximately 15 feet upstream of the proposed location due to low water levels, leaving the proposed location above water.

• Changed Mudline Elevations. Mudline elevations, referenced to National Oceanic and Atmospheric Administration gauging station #9440422 at the Port, were determined to be below the authorized maintenance dredging depths at the POL-B1, POL-B2 (offset), POL-B4, and POL-B5 locations (Table 3). These discrepancies were discussed with James Holm at USACE on October 12, 2016, and the decision was made to sample them regardless of their measured elevation since the samples would be representative of newly accumulated sediments within DMMU-1.

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4 Geological and Physical Analysis

4.1 Geological Description

The dredge prism in the Port berthing areas is generally composed of sand, gravelly sand, and silty sand at the surface, with interbedded gravel and cobble layers at depth. The gravel and cobble layers encountered during previous characterization sampling events (Anchor QEA 2011) were not encountered during this event due to the limited penetration of the surface grabs. At the Willow Grove Boat Basin, the dredge prism is generally composed of sand and silt. Sand is the predominant material near the boat basin entrance and the material becomes siltier toward the interior of the basin. Grab sample logs are provided in Appendix A.

4.2 Physical Parameters

Analytical Resources Incorporated (ARI) of Tukwila, Washington, performed the physical analysis of sediment samples. Samples were analyzed for the following standard SEF physical parameters:

• Grain size (per ASTM D422)

• Total solids (per Standard Method 2540 G-97)

• Total organic carbon (TOC; per Puget Sound Estuary Program 1986)

Physical analytical methods, detection limits, storage requirements, and quality control (QC) criteria were summarized in the SAP. Appendix C contains the laboratory certificates of analysis.

4.3 Physical Analytical Results

Physical analytical results are summarized below and in Table 4.

• Grain Size. The average grain size composition for the Port berthing areas consisted of approximately 0 percent gravel, 81.5 percent sand, 15.5 percent silt, and 3 percent clay.

Percent fines content (silt and clay) ranged from 6 to 38.7 percent. The finest sedimentary deposits were encountered in Berth 8 (DMMU-3) and the coarsest sedimentary deposits were encountered in the current-swept, open-water areas of Berth 9 (DMMU-4).

The average grain size composition of the Willow Grove Boat Basin consisted of 0 percent gravel, 58 percent sand, 30 percent silt, and 12 percent clay. Percent fines content (silt and clay) was 42 percent.

• Total Solids. Total solids ranged from 67 to 74 percent, averaging 71 percent at the Port’s berths; and 67 percent at the Willow Grove Boat Basin. The relatively high solids content is consistent with the dense granular composition of the sediments (i.e., predominantly sand).

• Total Organic Carbon. TOC ranged from 0.09 to 0.29 percent, averaging 0.18 percent at the Port’s berths; and 1.04 percent at the Willow Grove Boat Basin. Consistent with the coarse-grained composition (i.e., sand) the sediments are relatively poor in organic carbon. The

Sediment Characterization Report 10 January 2017 higher TOC content at the Willow Grove Boat Basin is correlated with higher fines content in these sediments.

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5 Chemical Analysis

5.1 Chemical Analytical Parameters

ARI of Tukwila, Washington, performed the sediment chemical analyses. Samples were analyzed for the following SEF chemical parameters:

• SEF metals (arsenic, cadmium, chromium, copper, lead, mercury, nickel, silver, and zinc;

U.S. Environmental Protection Agency [USEPA] method 6000/7000 series)

• Semivolatile organic compounds (SVOCs; USEPA method 8270D)

• Chlorinated pesticides (USEPA method 8081B)

• Polychlorinated biphenyls (PCBs; USEPA method 8082)

• Tributyltin (TBT), bulk sediment (USEPA method 8270) (excluding DMMU-5)

• Petroleum, diesel, and residual-range (Northwest total petroleum hydrocarbon-diesel extended range method)

• Ammonia and sulfide

This is the standard SEF analyte list plus TBT. TBT analysis is considered on a case-by-case basis and was performed at the Port berthing areas for this study because they accommodate frequent vessel traffic. TBT analysis was not required for the DMMU-5 sample from the Willow Grove Boat Basin.

Chemical analytical methods, detection limits, storage requirements, and QC criteria were summarized in the SAP. In all cases, laboratory reporting limits were below SEF SLs, providing unequivocal support for dredged material management decisions. Appendix C contains the laboratory certificates of analysis.

5.2 Data Quality Review

USEPA Level 2B Data Validation Review Report was completed by Laboratory Data Consultants, Inc., and is provided in Appendix B. The analytical laboratory followed the specified analytical methods and all requested sample analyses were completed. All detection limits were below corresponding SEF SLs. Accuracy and precision were evaluated using surrogates, sediment reference materials, laboratory control samples, matrix spikes, and laboratory duplicates. Most data were deemed acceptable as reported for project use; a few results were deemed acceptable with minor qualification, as summarized in Table 5. No data were rejected.

5.3 Chemical Analytical Results

Chemical analytical results are compiled in Table 4, and discussed in the remainder of this section.

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5.3.1 Comparison to Sediment Evaluation Framework for the Pacific Northwest Screening Levels

All chemical parameters were well below SEF SLs in the composited A-Interval samples from all Port berths, in many cases one or two orders of magnitude below SEF SLs (Table 4). These results indicate dredged material from the Port’s berths should be suitable for flow lane disposal in the Columbia River.

With the exception of sulfide, all chemical parameters were well below SEF SLs in the A-Interval sample from the Willow Grove Boat Basin, in many cases one or two orders of magnitude below SEF SLs (Table 4). According to SEF guidance, the detection of sulfide above 39 milligrams per kilogram at the Willow Grove Boat Basin does not impact the suitability of the material for in-water disposal since no other chemicals of concern were detected above SEF SLs (USACE et al. 2016 Table 6-2, footnote 3). These results indicate dredged material from the Willow Grove Boat Basin should be suitable for flow lane disposal in the Columbia River.

There were no detections of arsenic, mercury, or silver in any of the DMMUs. There were few or no detections of polycyclic aromatic hydrocarbon (PAHs) or other SVOCs in the majority of samples.

There were an increased number of PAH detections in the DMMU-1 sample, possibly due to a minor spill of crude oil at the east end of Berth 1 in February 2016 (near sample POL-B1, Figure 2a);

however, these concentrations are still well below their respective SLs. No detections of TBT were observed at the Port’s berths. No PCBs were detected in any samples. The only detection of any chlorinated pesticides was in DMMU-3, in which beta-Chlordane was detected at 0.72 micrograms per kilogram.

5.3.2 Comparison to Model Toxics Control Act Upland Soil Criteria All sediment analytical results at the Port berths and Willow Grove Boat Basin are below MTCA human health and ecological criteria for both unrestricted and industrial use (Table 1). As a result, the dredged material from these areas appears to be suitable for a variety of beneficial uses, such as residential or industrial fill, and upland or aquatic habitat. However, if the Port decides to pursue an upland or in-water beneficial use for the dredged material, additional permitting requirements may apply.

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6 Conclusions The results of the sediment characterization study support the following conclusions:

• The average grain size composition for the Port berthing areas consisted of approximately 0 percent gravel, 81.5 percent sand, 15.5 percent silt, and 3 percent clay. Percent fines content (silt and clay) ranged from 6 to 38.7 percent. TOC content ranged from 0.09 to 0.29 percent, averaging 0.18 percent.

• The grain size composition of the Willow Grove Boat Basin consisted of 0 percent gravel, 58 percent sand, 30 percent silt, and 12 percent clay. Percent fines content (silt and clay) was 42 percent. TOC content was 1.04 percent.

• All chemical analytical data were deemed acceptable for project use, either as reported or with minor qualifications.

• All chemical parameters were well below SEF SLs in the composited A-Interval samples from all Port berths (DMMUs 1 through 4), in many cases one or two orders of magnitude below SEF SLs (Table 4). These results indicate Port sediments should be suitable for flow lane disposal in the Columbia River.

• All chemical parameters were well below SEF SLs in the composited A-Interval sample from the Willow Grove Boat Basin (DMMU-5), in many cases one or two orders of magnitude below SEF SLs (Table 4). The conventional parameter sulfide was detected above its SL, but this would not preclude in-water disposal because no chemicals of concern were above SLs (USACE 2016 et al. Table 6-2). These results indicate Willow Grove Boat Basin sediments should be suitable for flow lane disposal in the Columbia River.

• The Port berth sediments are consistent with a “low” or “very low” ranking because concentrations of all analytes are below SEF SLs in all four DMMUs, consistent with the coarse-grained and organic-poor composition.

• The Willow Grove Boat Basin sediments are consistent with a “very low” ranking because concentrations of all analytes (except for the conventional parameter sulfide) are below SEF SLs, and there is limited potential for contamination from nearby sources.

All Port berth sediments and Willow Grove Boat Basin sediments are below MTCA unrestricted soil cleanup levels, and therefore appear to be suitable for a variety of beneficial uses. However, if the Port decides to pursue an upland or in-water beneficial use for the dredged material, additional permitting requirements may apply.

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7 References Anchor QEA, 2011. Sediment Characterization Report: Port of Longview Berth Maintenance Dredging and Deepening Project. Prepared for Port of Longview. August 2011.

Ecology (Washington Department of Ecology), 2013. Model Toxics Control Act Regulation and Statute.

Port of Longview, 2016. Sampling and Analysis Plan: Port of Longview Maintenance Dredging.

September 2016.

USACE et al. (U.S. Army Corps of Engineers, U.S. Environmental Protection Agency, and others), 2016.

Sediment Evaluation Framework for the Pacific Northwest. July 2016.

Tables

Table 1 Dredged Material Screening Criteria

Sediment Characterization Report Port of Longview Maintenance Dredging Project

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Unrestricted Industrial Unrestricted Industrial

Total Solids -- -- -- -- -- 0.1 Total Volatile Solids -- -- -- -- -- 0.1 Total Organic Carbon -- -- -- -- -- 0.1 Total Sulfides 39 -- -- -- -- 1 Ammonia 230 -- -- -- -- 0.1 Grain Size -- -- -- -- -- 1

Arsenic 14 20 20 20 20 5.0 Cadmium 2.1 2 2 25 36 0.5 Chromium 72 2,000 2,000 42 135 5.0 Copper 400 -- -- 100 550 5.0 Lead 360 250 1,000 220 220 5.0 Mercury 0.66 2 2 9 9 0.05 Nickel 26 -- -- 100 1,850 5.0 Selenium 11 -- -- 0.8 0.8 1 Silver 0.57 -- -- -- -- 0.5 Zinc 3,200 -- -- 270 570 5

Naphthalene -- 5,000 5,000 -- -- 20 Acenaphthylene -- -- -- -- -- 20 Acenaphthene -- -- -- -- -- 20 Fluorene -- -- -- -- -- 20 Phenanthrene -- -- -- -- -- 20 Anthracene -- -- -- -- -- 20 2‐Methylnaphthalene -- -- -- -- -- 20

Fluoranthene -- -- -- -- -- 20 Pyrene -- -- -- -- -- 20 Benzo(a)anthracene -- -- -- -- -- 20 Chrysene -- -- -- -- -- 20 Benzo(b)fluoranthene -- -- -- -- -- 20 Benzo(k)fluoranthene -- -- -- -- -- 20 Benzo(a)pyrene -- 100 2,000 30,000 300,000 20 Indeno(1,2,3‐cd)pyrene -- -- -- -- -- 20 Dibenz(a,h)anthracene -- -- -- -- -- 20 Benzo(g,h,i)perylene -- -- -- -- -- 20 Total PAHs 17,000 100 100 -- -- 20

Di‐n‐butyl phthalate 380 -- -- 200 -- 20 Bis(2‐ethylhexyl)phthalate 500 -- -- -- -- 100 Di‐n‐octyl phthalate 39 -- -- -- -- 20

Phenol 120 -- -- -- -- 20 4-Methylphenol 260 -- -- -- -- 20 Pentachlorophenol 1,200 -- -- 11,000 11,000 100 2-Methylphenol -- -- -- -- -- 20

High molecular weight PAHs

Phthalates (µg/kg)

Phenols (µg/kg)

CONVENTIONAL PARAMETERS

STANDARD CHEMICALS OF CONCERN

Metals (mg/kg)

Polynuclear Aromatic Hydrocarbons (PAHs) (µg/kg) Low molecular weight PAHs

Chemical Analyte

SEF

Screening Level1

Model Toxics Control Act Soil Criteria2 (mg/kg) Laboratory Reporting

Limit Human Health Ecological

Table 1 Dredged Material Screening Criteria

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January 2017

Unrestricted Industrial Unrestricted Industrial Chemical Analyte

SEF

Screening

Level1

Model Toxics Control Act Soil Criteria2 (mg/kg) Laboratory Reporting

Limit Human Health Ecological

2, 4-Dimethylphenol -- -- -- -- -- 20

Benzoic acid 2,900 -- -- -- -- 20 Carbazole 900 -- -- -- -- 20 Dibenzofuran 200 -- -- -- -- 20 Hexachlorobenzene -- -- -- 31,000 31,000 20

DDDs 310 -- -- -- -- 2 DDEs 21 -- -- -- -- 2 DDTs 100 3,000 4,000 -- -- 2 Dieldrin 4.9 -- -- 170 170 2 Beta-Hexachlorocyclohexane 7.2 -- -- -- -- 2 Endrin ketone 8.5 -- -- 400 400 2 Aldrin -- -- -- 170 170 2 Total Chlordane -- -- -- 1,000 7,000 2 Heptachlor -- -- -- 600 600 2

Total Aroclors (1016, 1221, 1232, 1242, 1248, 1254, 1260)

110 1,000 10,000 2,000 2,000 10

Monobutyltin 540 -- -- -- -- 5 Dibutyltin 910 -- -- -- -- 5 Tributyltin 47 -- -- -- -- 5 Tetra-butyltin 97 -- -- -- -- 5

TPH‐Diesel (DRO) 340 2,000 2,000 460 15,000 25 TPH‐Residual (RRO) 3,600 -- -- -- -- 50 Notes:

1. USACE et al. 2016. Proposed freshwater screening levels adopted from SEF October 2015.

2. MTCA Cleanup Regulation 173‐340‐900. Revised 2013 µg/kg: micrograms per kilogram DRO: diesel range organics mg/kg: milligrams per kilogram RRO: residual range organics SEF: Sediment Evaluation Framework for the Pacific Northwest

Polychlorinated Biphenyls (PCBs) (µg/kg)

CHEMICALS OF SPECIAL OCCURANCE

Butyltins (berths only)

Total Petroleum Hydrocarbons (TPH) (mg/kg)

Miscellaneous Extractable Organic Compounds (µg/kg)

Pesticides (µg/kg)

Table 2 Sediment Sample Locations, Depths, and Elevations

Sediment Characterization Report Port of Longview Maintenance Dredging Project

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Easting Northing

POL‐B1 10/12/2016 9:24 1017172.76 291845.64 -43.5 5.5

POL‐B22 10/12/2016 10:44 1017717.48 291473.95 -43.2 6.5

POL‐B4 10/12/2016 8:46 1018177.68 291143.73 -44.9 6.3

POL‐B5 10/11/2016 17:25 1019452.99 290312.55 -43.6 6.0

POL‐B6 10/11/2016 11:35 1020149.93 289911.04 -37.6 6.0

POL‐B7C 10/11/2016 10:47 1020752.29 289556.09 -36.1 5.8

POL‐B7W 10/11/2016 11:11 1020352.00 289779.50 -37.4 5.5

POL‐B8E 10/11/2016 9:55 1021257.52 289245.80 -36.6 6.5

POL‐B8W 10/11/2016 10:17 1021076.49 289359.87 -38.7 6.0

POL‐B9 4 COMP-POL-04A_2016 10/11/2016 9:17 1022320.73 288574.42 -37.6 6.5

POL‐WGN 10/11/2016 16:20 985737.31 317259.84 -1.9 9.5

POL‐WGS3 10/11/2016 16:43 985757.47 317085.07 1.9 9.0

Notes:

1. Datum is North American Datum of 1983 (NAD83), Washington State Plane South, U.S. Survey Feet.

2. The POL-B2 sampling location was offset due to the berth being occupied.

3. The POL-WGS sampling location was offset due to low river levels leaving the original location above water line.

CRD: Columbia River Datum DMMU: Dredged Material Management Unit

Recovered Length (inches)

Mudline (feet CRD)

Sample Coordinates1

Sediment Grabs

Sediment Sampling Station

DMMU Sample ID

COMP-POL-03A_2016

COMP-POL-05A_20165

Sampling Date Sampling

Time

COMP-POL-01A_2016

COMP-POL-02A_2016

Table 3 Sample Compositing Scheme

Sediment Characterization Report Port of Longview Maintenance Dredging Project

January 2017

POL-B1 POL-B2 POL-B4 POL-B5

-39 to -40 -40 to -41 -41 to -42 -42 to -43 -43 to -44 -44 to -45

POL-B6 POL-B7W POL-B7C

-38 to -39 -39 to -40 -40 to -41 -41 to -42

POL-B8W POL-B8E

-38 to -39 -39 to -40 -40 to -41 -41 to -42 -42 to -43 -43 to -44 -44 to -45

POL-B9

-38 to -39 -39 to -40 -40 to -41 -41 to -42 -42 to -43 -43 to -44 -44 to -45

POL-WGN POL-WGS

3 to -1 -1 to -2 -2 to -3 -3 to -4 -4 to -5 -5 to -6

Notes:

: dredge prism material

1. Discrete samples archived from each sediment grab location CRD: Columbia River Datum DMMU: Dredged Material Management Unit

Submited for Analysis and

Archived1

A

COMP-POL-

05A_2016

Submited for Analysis and

Archived1

COMP-POL-

02A_2016

Submited for Analysis and

Archived1

COMP-POL-

04A_2016

COMP-POL-

03A_2016

Submited for Analysis and

Archived1

COMP-POL-

01A_2016

Submited for Analysis and

Archived1 A

DMMU

Sample Interval

Grab Composting Scheme

DMMU-1

Composite Sample

ID

Action

A A

DMMU-2 A A A

A

DMMU-4

DMMU-3 A A

DMMU-5 A A

Table 4 Sediment Physical and Chemical Analytical Results

Sediment Characterization Report Port of Longview Maintenance Dredging Project

January 2017

Berths 1,2,4,5 Berths 6,7 Berth 8 Berth 9 Willow Grove COMP-POL-01A_2016 COMP-POL-02A_2016 COMP-POL-03A_2016 COMP-POL-04A_2016 COMP-POL-05A_2016

DMMU-1 DMMU-2 DMMU-3 DMMU-4 DMMU-5

10/12/2016 10/11/2016 10/11/2016 10/11/2016 10/11/2016

-- 0.09 J 0.12 J 0.23 J 0.29 J 1.04 J -- 72.36 71.53 67.1 74.34 67.41 -- 0.523 0.694 1.18 0.436 2.1

230 1.03 8.06 13.6 4.44 23.8 39 0.673 U 0.664 U 6.87 0.662 U 157

-- 1.2 0 0 0 0.3 -- 90.2 80.7 61.2 94 57.9 -- 6.8 15.8 35.3 4.3 30.4 -- 1.8 3.5 3.4 1.7 11.6

14 6.79 U 6.48 U 6.92 U 6.45 U 6.89 U

2.1 0.151 J 0.129 J 0.175 J 0.15 J 0.255 J 72 6.42 5.76 6.23 5.65 7.57 400 14.8 15.7 18.5 14.1 19.9 360 1.95 J 0.977 J 1.33 J 0.759 J 3.46

0.66 0.02867 U 0.03345 U 0.0272 U 0.02327 U 0.03117 U 26 7.88 7.1 7.19 7.09 7.79 11 2.62 U 2.63 U 0.71 J 0.54 J 2.86 U

0.57 0.408 U 0.389 U 0.415 U 0.387 U 0.414 U 3,200 25.4 25.8 24.8 21.5 44

Total solids Total volatile solids Conventional Parameters (mg/kg) Ammonia Sulfide

SEF

Freshwater

SL

Conventional Parameters (pct) Total organic carbon

Grain Size (pct)

Clay Metals (mg/kg) Arsenic Cadmium Chromium

Gravel Sand Silt

Silver Zinc

Copper Lead Mercury Nickel Selenium

Sediment Characterization Report Port of Longview Maintenance Dredging Project

January 2017

Berths 1,2,4,5 Berths 6,7 Berth 8 Berth 9 Willow Grove COMP-POL-01A_2016 COMP-POL-02A_2016 COMP-POL-03A_2016 COMP-POL-04A_2016 COMP-POL-05A_2016

DMMU-1 DMMU-2 DMMU-3 DMMU-4 DMMU-5

10/12/2016 10/11/2016 10/11/2016 10/11/2016 10/11/2016

SEF

Freshwater

SL

47 4.92 U 4.95 U 5.79 U 5.22 U -- 540 5.2 U 5.23 U 6.12 U 5.52 U -- 910 7.37 U 7.41 U 8.67 U 7.82 U -- 97 6.38 U 6.41 U 7.5 U 6.77 U --

-- 4.87 U 4.92 U 4.99 U 4.82 U 8.21 -- 4.87 U 4.92 U 4.99 U 4.82 U 4.89 U -- 4.87 U 4.92 U 4.99 U 4.82 U 4.89 U -- 4.87 U 4.92 U 4.99 U 4.82 U 4.89 U -- 4.13 J 4.92 U 4.99 U 4.82 U 3.19 J -- 4.38 J 4.92 U 4.99 U 4.82 U 2.87 J -- 4.51 J 2.91 J 2.39 J 4.82 U 4.91 -- 3.4 J 4.92 U 4.99 U 4.82 U 4.83 J -- 2.37 J 4.92 U 4.99 U 4.82 U 2.69 J -- 4.96 4.13 J 2.51 J 4.82 U 7.73 -- 4.87 U 4.92 U 4.99 U 4.82 U 4.89 U -- 10.2 12.1 5.56 4.82 U 9.92 -- 4.87 U 4.92 U 4.99 U 4.82 U 4.89 U -- 3.05 J 4.92 U 4.99 U 4.82 U 3.45 J -- 2.54 J 4.92 U 4.99 U 4.82 U 5.62 -- 5.12 6.99 4.8 J 4.82 U 9.45 -- 10.8 9.13 4.46 J 4.82 U 12.1

17,000 79.13 J 70.98 J 55.18 J 4.82 U 97.9 J

-- 19.5 U 19.5 U 19.9 U 19.2 U 19.6 U -- 24.4 U 24.3 U 24.9 U 24 U 24.5 U

260 19.5 U 19.5 U 19.9 U 19.2 U 19.6 U 2,900 195 U 195 U 61.8 J 192 U 68.6 J 500 48.7 U 48.7 U 49.8 U 48 U 48.9 U 900 19.5 U 19.5 U 19.9 U 19.2 U 19.6 U 200 19.5 U 19.5 U 19.9 U 19.2 U 19.6 U 380 19.5 U 19.5 U 19.9 U 19.2 U 19.6 U 39 19.5 U 19.5 U 19.9 U 19.2 U 19.6 U

1,200 97.4 UJ 97.4 UJ 99.7 UJ 95.9 UJ 97.9 UJ

120 19.5 U 19.5 U 8.4 J 19.2 U 11.2 J

-- 4 U 3.8 U 3.9 U 4 U 3.8 U -- 4 U 3.8 U 3.9 U 4 U 3.8 U -- 4 U 3.8 U 3.9 U 4 U 3.8 U -- 4 U 3.8 U 3.9 U 4 U 3.8 U -- 4 U 3.8 U 3.9 U 4 U 3.8 U -- 4 U 3.8 U 3.9 U 4 U 3.8 U -- 4 U 3.8 U 3.9 U 4 U 3.8 U

110 4 U 3.8 U 3.9 U 4 U 3.8 U

Organometallic Compounds (µg/kg) Tributyltin (ion) Monobutyltin

Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene

Dibutyltim Tetrabutyltin Polycyclic Aromatic Hydrocarbons (PAH) (µg/kg) 2-Methylnaphthalene Acenaphthene

Fluorene Indeno(1,2,3-c,d)pyrene Naphthalene Phenanthrene Pyrene

Benzo(g,h,i)perylene Benzo(k)fluoranthene Chrysene Dibenzo(a,h)anthracene Fluoranthene

Benzoic acid Bis(2-ethylhexyl) phthalate Carbazole Dibenzofuran Di-n-butyl phthalate

Total PAH (U = 1/2) Semivolatile Organics (µg/kg) 2-Methylphenol (o-Cresol) 2,4-Dimethylphenol 4-Methylphenol (p-Cresol)

Aroclor 1221 Aroclor 1232 Aroclor 1242 Aroclor 1248 Aroclor 1254

Di-n-octyl phthalate Pentachlorophenol Phenol PCB Aroclors (µg/kg) Aroclor 1016

Aroclor 1260 Total PCB Aroclors

Sediment Characterization Report Port of Longview Maintenance Dredging Project

January 2017

Berths 1,2,4,5 Berths 6,7 Berth 8 Berth 9 Willow Grove COMP-POL-01A_2016 COMP-POL-02A_2016 COMP-POL-03A_2016 COMP-POL-04A_2016 COMP-POL-05A_2016

DMMU-1 DMMU-2 DMMU-3 DMMU-4 DMMU-5

10/12/2016 10/11/2016 10/11/2016 10/11/2016 10/11/2016

SEF

Freshwater

SL

310 0.99 U 0.94 U 0.98 U 0.99 U 0.95 U 21 0.99 U 0.94 U 0.98 U 0.99 U 0.95 U 100 0.99 U 0.94 U 0.98 U 0.99 U 0.95 U -- 0.49 U 0.47 U 0.49 U 0.5 U 0.48 U alpha-Chlordane (cis-Chlordane) -- 0.49 U 0.47 U 0.49 U 0.5 U 0.48 U -- 0.49 U 0.47 U 0.72 0.5 U 0.48 U -- 0.99 U 0.94 U 0.98 U 0.99 U 0.95 U

-- 0.99 U 0.94 U 2.94 UJ 0.99 U 0.95 U

-- 0.99 U 0.94 U 0.98 U 0.99 U 0.95 U

4.9 0.99 U 0.94 U 0.98 U 0.99 U 0.95 U

8.5 0.99 U 0.94 U 0.98 U 0.99 U 0.95 U

7.2 0.49 U 0.47 U 0.49 U 0.5 U 0.48 U -- 0.49 U 0.47 U 0.49 U 0.5 U 0.48 U -- 0.99 U 0.94 U 1.46 0.99 U 0.95 U

340 6.3 U 6.36 U 7.44 U 6.69 U 6.78 U 3,600 12.6 U 12.7 U 14.9 U 13.4 U 13.6 U

Notes:

Bold = detected result

: Detected concentration is greater than SEF freshwater screening level (Corps et al. 2016)

1. Total chlordane is the summation of alpha-Chlordane, beta-Chlordane, and Oxychlordane µg/kg: micrograms per kilogram DMMU: Dredged Material Management Unit J: estimated value mg/kg: milligrams per kilogram PCB: polychlorinated biphenyl pct: percent SEF: Sediment Evaluation Framework for the Pacific Northwest SL: screening level U: compound analyzed, but not detected above indicated detection limit

4,4'-DDT (p,p'-DDT) Aldrin beta-Chlordane (trans-Chlordane) cis-Nonachlor

Pesticides (µg/kg) 4,4'-DDD (p,p'-DDD) 4,4'-DDE (p,p'-DDE)

Residual Range Hydrocarbons

Heptachlor Total Chlordane1

Total Petroleum Hydrocarbons (mg/kg) Diesel Range Hydrocarbons trans-Nonachlor Oxychlordane Dieldrin Endrin gamma-BHC (Lindane)

Table 5 Data Validation Results

Sediment Characterization Report Port of Longview Berth Maintenance Dredging Project

January 2017

Sample ID Parameter Analyte Reported Result Qualified Result Reason SVOC Pentachlorophenol 97.4U µg/kg 97.4UJ µg/kg CCV %D > 30%

Conventionals Total organic carbon 0.09% 0.09J% MS %R below control limit SVOC Pentachlorophenol 97.4U µg/kg 97.4UJ µg/kg CCV %D > 30%

Conventionals Total organic carbon 0.12% 0.12J% MS %R below control limit SVOC Pentachlorophenol 99.7U µg/kg 99.7UJ µg/kg CCV %D > 30%

Conventionals Total organic carbon 0.23% 0.23J% MS %R below control limit SVOC Pentachlorophenol 95.9U µg/kg 95.9UJ µg/kg CCV %D > 30%

Conventionals Total organic carbon 0.29% 0.29J% MS %R below control limit SVOC Pentachlorophenol 97.9U µg/kg 97.9UJ µg/kg CCV %D > 30%

Conventionals Total organic carbon 1.04% 1.04J% MS %R below control limit Notes:

%D: percent difference %R: percent recovery µg/kg: micrograms per kilogram CCV: continuing calibration verification J: indicates an estimated value MS: matrix spike SVOC: semivolatile organic compound U: indicates the compound or analyte was analyzed for but not detected at or above the specified limit UJ: indicates the compound or analyte was analyzed for but not detected and the specified limit reported is estimated

COMP-POL-01A_20161012

COMP-POL-02A_20161011

COMP-POL-03A_20161011

COMP-POL-04A_20161011

COMP-POL-05A_20161011

Figures

Bradbury Slough

Columbia River

Port of Longview Berths

Willow Grove

Boat Basin

Columbia River

WASHINGTON

Scale in Miles

1.75

SOURCE: Google Earth, 2016.

HORIZONTAL DATUM: Washington State

Plane South, NAD83, U.S. Feet.

Seattle

Longview

OREGON

Portland

Publish Date: 2017/01/26 12:20 PM | User: hhayward

Filepath: K:\Projects\0208-Port of Longview\Sediment Characterization\0208-RP-003 (Vmap).dwg 1

Figure 1

Vicinity Map

Port of Longview

50'

Berth 5

1078'

Port of Longview

N

E

N a v i g a t i o n

C h a n n e l

B o u n d a r y

Berth 1

Berth 2

Berth 4

442'

Berth 5

1400'

550'

1078'

FLOOD

EBB

COLUMBIA RIVER

-4

-50

-45

-4

POL-B4

POL-B5

POL-B1

POL-B1

POL-B2 (offset)

POL-B2

POL-B5

POL-B4

BATHYMETRIC SURVEY: Solmar Hydro dated October 18, 2016

HORIZONTAL DATUM: Washington State Plane South, NAD83, U.S. Survey Feet.

VERTICAL DATUM: Columbia River Datum (CRD).

NOTE: The location of all port facilities and docks displayed on this drawing were provided by the Port of Longview. The linework for all docks and port features displayed here is for informational purposes only and should not be considered survey grade accuracy.

LEGEND:

Proposed Sample Location and Identification

Final Sample Location and Identification

Area above -40' CRD

Area above -43' CRD

Feet

Publish Date: 2017/01/26 12:33 PM | User: hhayward

Filepath: K:\Projects\0208-Port of Longview\Sediment Characterization\0208-RP-004.dwg 2a

Figure 2a

Sediment Sample Locations

Sediment Characterization Report

Port of Longview

M a t c h l i n e

F i g u r e b

D

Y

H D

Y

H

D

Y

H

DIKE RIGHT-OF-WAY

200' SHORELINE LIMIT

OHW

Berth 6

Berth 7

Berth 8

Berth 5

500'

1078'

N

Port of Longview

E

Berth 9

567'

N a v i g a t i o n

C h a n n e l

B o u n d a r y

N

E

1456'

Port o f Longview

(Faciliti es Under-C onstru ction)

1050'

Berth 8

EBB

FLOOD

COLUMBIA RIVER

POL-B8E

POL-B9

POL-B8WPOL-B7C

POL-B7W

POL-B6

POL-B5

POL-B5

POL-B6

POL-B7C

POL-B7W

POL-B8W

POL-B8E

POL-B9

M a t c h l i n e

F i g u r e a

BATHYMETRIC SURVEY: Solmar Hydro dated October 18, 2016

HORIZONTAL DATUM: Washington State Plane South, NAD83, U.S. Survey Feet.

VERTICAL DATUM: Columbia River Datum (CRD).

NOTE: The location of all port facilities and docks displayed on this drawing were provided by the Port of Longview. The linework for all docks and port features displayed here is for informational purposes only and should not be considered survey grade accuracy.

LEGEND:

Proposed Sample Location and Identification

Final Sample Location and Identification

Area above -40' CRD

Area above -43' CRD

Feet

Publish Date: 2017/01/26 12:34 PM | User: hhayward

Filepath: K:\Projects\0208-Port of Longview\Sediment Characterization\0208-RP-004.dwg 2b

Figure 2b

Sediment Sample Locations

Willow Grove Boat Launch

FLOOD

EBB

COLUMBIA RIVER

POL-WGN

POL-WGS

POL-WGN

POL-WGS

0 60

Scale in Feet

LEGEND:

Proposed Sample Location and Identification

Final Sample Location and Identification

Area above -6.3' CRD

BATHYMETRIC SURVEY: Solmar Hydro dated October 18, 2016

HORIZONTAL DATUM: Washington State Plane South, NAD83, U.S. Survey Feet.

VERTICAL DATUM: Columbia River Datum (CRD).

NOTE: The location of all port facilities and docks displayed on this drawing were provided by the Port of Longview. The linework for all docks and port features displayed here is for informational purposes only and should not be considered survey grade accuracy.

Publish Date: 2017/01/26 12:34 PM | User: hhayward

Filepath: K:\Projects\0208-Port of Longview\Sediment Characterization\0208-RP-004.dwg 2c

Figure 2c

Sediment Sample Locations

0 20 40 60 80 100 1202040

0 20 40 60 80 1002040

0 20 40 60 80 1002040

0 20 40 60 80 1002040

0 20 40 60 80 10020

HORIZONTAL DISTANCE (FEET)

-60

-40

-20

-60

-40

-20

-60

-40

-20

E

LE

V A

TI

O

N

FE

E

T C

R D

-60

-40

-20

-60

-40

-20

LIMIT OF DREDGE PRISM

3'-6" FENDER

SYSTEM OFFSET

BERTH 2

PIERHEAD LINE

BERTH 4

FENDER LINE

LIMIT OF DREDGE PRISM

LIMIT OF DREDGE PRISM

LIMIT OF DREDGE PRISM

LIMIT OF DREDGE PRISM

BERTH 5

PIERHEAD LINE

3'-6" FENDER

SYSTEM OFFSET

BERTH 7

PIERHEAD LINE

6'-0" FENDER

SYSTEM OFFSET

120 12040

BERTH 8

PIERHEAD LINE

HORIZONTAL DISTANCE (FEET)

E

LE

V A

TI

O

N

FE

E

T C

R D

HORIZONTAL DISTANCE (FEET)

E

LE

V A

TI

O

N

FE

E

T C

R D

HORIZONTAL DISTANCE (FEET)

E

LE

V A

TI

O

N

FE

E

T C

R D

HORIZONTAL DISTANCE (FEET)

E

LE

V A

TI

O

N

FE

E

T C

R D

SECTION

SECTION

SECTION

SECTION

SECTION

2' ALLOWABLE OVERDEPTH

2' ALLOWABLE OVERDEPTH

2' ALLOWABLE OVERDEPTH

REQUIRED DREDGE

ELEVATION -43 CRD

EXISTING MUDLINE

2' ALLOWABLE OVERDEPTH

REQUIRED DREDGE

ELEVATION -43 CRD

EXISTING MUDLINE

2' ALLOWABLE OVERDEPTH

REQUIRED DREDGE

ELEVATION -43 CRD

EXISTING MUDLINE

REQUIRED DREDGE

ELEVATION -43 CRD

EXISTING MUDLINE

REQUIRED DREDGE

ELEVATION -43 CRD

EXISTING MUDLINE

PROPOSED POL-B2

(ACTUAL IS 227' E)

POL-B4

POL-B5

POL-B5

POL-B6

0 30

Scale in Feet

NOTES:

1. Drawing prepared from CAD file provided by Port of Longview dated July 12, 2016.

2. Sample locations shown on sections are approximate.

3. Sample location POL-B2 was relocated approximately 250 feet upstream of the proposed location shown due to a vessel obstruction.

BATHYMETRIC SURVEY SHOWN ON SECTIONS: Solmar Hydro dated July 3, 2015

HORIZONTAL DATUM: Washington State Plane South, NAD83, U.S. Survey Feet.

VERTICAL DATUM: Columbia River Datum (CRD).

LEGEND:

Dredge Material Above the Required Elevation

Assumed Area of Sloughing

Publish Date: 2017/01/26 12:39 PM | User: hhayward

Filepath: K:\Projects\0208-Port of Longview\Sediment Characterization\0208-RP-005 (Sections).dwg 3b

Figure 3a Berth Sections

-10

SECTION

-20

152.3'

LIMIT OF DREDGE PRISM

63.5'

LIMIT OF DREDGE PRISM

54.3'

LIMIT OF DREDGE PRISM

-10

-20

-10

-20

-10

-20

142.5'

LIMIT OF DREDGE PRISM

98.1'

LIMIT OF DREDGE PRISM

87.3'

LIMIT OF DREDGE PRISM

-10

-20

-10

-20

SECTION

SECTION

SECTION

SECTION

SECTION

HORIZONTAL DISTANCE (FEET)

E

LE

V A

TI

O

N

FE

E

T C

R D

E

LE

V

A

TI

O N

FE

E T

C R

D

E

LE

V A

TI

O

N

FE

E

T C

R D

E

LE

V A

TI

O

N

FE

E

T C

R D

E

LE

V A

TI

O

N

FE

E

T C

R D

E

LE

V A

TI

O

N

FE

E

T C

R D

EXISTING MUDLINE

REQUIRED DREDGE

ELEVATION -6.3' CRD

MATCH EXISTING

MUDLINE AT ELEV.

-3.3' CRD

MATCH EXISTING

MUDLINE AT ELEV.

1.7' CRD

MATCH EXISTING

MUDLINE AT ELEV.

-4.4' CRD

MATCH EXISTING

MUDLINE AT ELEV.

1.2' CRD

EXISTING MUDLINE

REQUIRED DREDGE

ELEVATION -6.3' CRD

MATCH EXISTING

MUDLINE AT ELEV.

6.6' CRD

MATCH EXISTING MUDLINE

AT ELEV. 3.2' CRD

MATCH EXISTING

MUDLINE AT ELEV.

6.5' CRD

MATCH EXISTING

MUDLINE AT ELEV.

-3.3'

MATCH EXISTING MUDLINE

AT ELEV. 4.5' CRD

MATCH EXISTING

MUDLINE AT ELEV.

-6.3' CRD

MATCH EXISTING

MUDLINE AT ELEV.

-6.3' CRD

MATCH EXISTING

MUDLINE AT ELEV.

-5.9' CRD

REQUIRED DREDGE

ELEVATION -6.3 CRD

EXISTING MUDLINE

REQUIRED DREDGE

ELEVATION -6.3 CRD

EXISTING MUDLINE

EXISTING MUDLINE

REQUIRED DREDGE

ELEVATION -6.3' CRD

REQUIRED DREDGE

ELEVATION -6.3 CRD

EXISTING MUDLINE

POL-WGS

POL-WGN

0 20 40 60 80 100 120 140 160 180

HORIZONTAL DISTANCE (FEET)

0 20 40 60 80 100 120 140 160 180 200 220

HORIZONTAL DISTANCE (FEET)

0 20 40 60 80 100 120 140 160 180 200 220 240

HORIZONTAL DISTANCE (FEET)

0 20 40 60 80 100 120 140 160 180

HORIZONTAL DISTANCE (FEET)

0 20 40 60 80 100 120 140 160

HORIZONTAL DISTANCE (FEET)

0 20 40 60 80 100 120 140

BATHYMETRIC SURVEY SHOWN ON SECTIONS: Solmar Hydro dated July 3, 2015

HORIZONTAL DATUM: Washington State Plane South, NAD83, U.S. Survey Feet.

VERTICAL DATUM: Columbia River Datum (CRD).

NOTES:

1. Drawing prepared from CAD file provided by Port of Longview dated July 12, 2016.

2. Sample locations shown on sections are approximate.

3. Sample location POL-WGS was relocated approximately 15 feet upstream of the proposed location due to low water levels.

LEGEND:

Dredge Material Above the Required Elevation

Assumed Area of Sloughing

Feet

Publish Date: 2017/01/26 12:39 PM | User: hhayward

Filepath: K:\Projects\0208-Port of Longview\Sediment Characterization\0208-RP-005 (Sections).dwg 3a

Figure 3b Willow Grove Boat Launch Sections