SKAGWAY ORE BASIN RISK ASSESSMENT APPENDIX B Sampling and Analysis Plan for Surficial Sediment Sampling 25 January 2018 Report No. 1657231-006-R-Rev0 17 April 2017 STUDY DESIGN AND SAMPLING & ANALYSIS PLAN Skagway Ore Basin Sediment Assessment Submitted to: White Pass & Yukon Route Railway PO Box 435 Skagway, AK 99840 Report Number: 1657231-002-R-Rev1 Distribution: 1 copy - White Pass & Yukon Route Railway REPORT 1 copy - Golder Associates Ltd. ORE BASIN SAMPLING AND ANALYSIS PLAN Table of Contents 1.0 INTRODUCTION .................................................................................................................................................... 1 1.1 Purpose of this Document ........................................................................................................................ 1 1.2 Site Description......................................................................................................................................... 1 1.3 Summary of Historical Information ............................................................................................................ 1 1.3.1 Sediment Chemistry, Toxicity and Benthic Community Data .............................................................. 1 1.3.2 Other Historical Information ................................................................................................................ 2 1.3.3 Sediment Transport Assessment ........................................................................................................ 3 1.4 Remaining Data Gaps .............................................................................................................................. 4 2.0 STUDY DESIGN .................................................................................................................................................... 5 2.1 General Approach..................................................................................................................................... 5 2.2 Sample Locations ..................................................................................................................................... 6 2.2.1 Selection of Ore Basin Locations ........................................................................................................ 6 2.2.2 Selection of Reference Locations ....................................................................................................... 8 2.2.3 Location and Number of Samples ....................................................................................................... 8 3.0 SAMPLING AND ANALYTICAL METHODS ......................................................................................................... 9 3.1 General Field Procedures ......................................................................................................................... 9 3.2 Sediment Sample Collection ................................................................................................................... 10 3.3 Sediment Chemistry Analysis ................................................................................................................. 11 3.4 Benthic Community Sample Collection and Analysis .............................................................................. 13 3.5 Tissue Sample Collection and Analysis .................................................................................................. 13 3.6 Sediment Toxicity Testing ....................................................................................................................... 15 3.7 Toxicity Identification Evaluation ............................................................................................................. 16 4.0 RISK ASSESSMENT WORK PLAN .................................................................................................................... 16 4.1 Human Health Work Plan ....................................................................................................................... 16 4.2 Ecological Risk Assessment Work Plan ................................................................................................. 18 5.0 REPORTING ........................................................................................................................................................ 19 6.0 CLOSURE ............................................................................................................................................................ 20 7.0 REFERENCES ..................................................................................................................................................... 21 17 April 2017 Report No. 1657231-002-R-Rev1 i ORE BASIN SAMPLING AND ANALYSIS PLAN TABLES Table 1: Types of Data Collected During Historical Investigations in the Vicinity of the Ore Basin ................................. 2 Table 2: Proposed Sampling Effort ................................................................................................................................. 9 Table 3: Sampling requirements, volume, container and preservative, and holding times. ........................................... 11 Table 4: Sediment chemistry analytical methods .......................................................................................................... 12 Table 5: Tissue chemistry analytical methods ............................................................................................................... 14 FIGURES Figure 1: Site Location Figure 2: Surface Sediment and Core Sample Locations Figure 3: Reference Sediment Sample Locations Figure 4A: Distribution of Hazard Quotients for Surface Samples (0 to 6 inch) Figure 4B: Distribution of Hazard Quotients for Subsurface Samples (6 to 36 inch) Figure 5A: Total Hazard Quotients for Surface Samples – Metals Figure 5B: Total Hazard Quotients for Near Surface Samples – Metals Figure 6: Proposed Sample Locations APPENDICES APPENDIX A Chemistry Figures APPENDIX B Resumés for Qualified Environmental Professionals and Qualified Samplers 17 April 2017 Report No. 1657231-002-R-Rev1 ii ORE BASIN SAMPLING AND ANALYSIS PLAN 1.0 INTRODUCTION 1.1 Purpose of this Document This document provides a study design and sampling and analysis plan (SAP) to support an ecological and human health risk assessment for the Skagway Ore Terminal (the “Ore Basin”). A brief overview of the historical data is provided to provide context for the proposed study design. The sampling and analysis plan describes the specific data to be collected along with details regarding the proposed sampling methodology and quality assurance / quality control measures. 1.2 Site Description The Skagway Ore Terminal and other portions of Skagway Harbour are shown on Figure 1. Skagway Harbour lies at the terminus of a deep fjord (Lynn Canal) on the historical alluvial fan of the Skagway River. The harbour consists of a limited near-shore zone with a typical water depth of between 30 and 40 feet (measured from mean low tide) which transitions rapidly to the deeper waters in Lynn Canal (Anchor 2015). The shoreline of Skagway Harbour was established on the historical alluvial fan through a combination of dredging and filling in the early 1900s (Tetra Tech 2008). Substantial changes to the harbour configuration were made during the construction of the Small Boat Harbour (circa 1958), the State Ferry Terminal (circa 1963), and the expansion of the Ore Terminal (circa 1968), all of which involved dredging and use of the dredged material to expand and reconfigure the shoreline (Anchor 2015). A brief summary of historical site activities at the Ore Terminal is provided for further context (Anchor 2015). The Ore Terminal portion was leased by White Pass and Yukon Railway (WYPR) from the Municipality of Skagway in the late 1960s and was primarily used for the trans-shipment of ore concentrate from the Faro Mine (Yukon; primarily lead and zinc concentrates) using an open conveyor system between 1967 and 1982. Sporadic use of the facility for shipping ore concentrates continued between 1982 and 1997 with a variety of terminal operators, and the conveyor system was enclosed in 1991. A concrete dock was added in 2000 to allow the facility to be used by cruise ships, and the historical ore concentrate building was demolished in 2003. A new concentrate building was constructed and has been used for shipment of copper concentrates from the Minto Mine since 2007. The terminal is currently operated by Alaska Industrial Development and Export Authority (AIDEA). Infrastructure includes a fuel depot (operated by Petro49) and a container facility (operated by Alaska Marine Lines) in addition to the ore concentrate shipping and cruise ship docking. 1.3 Summary of Historical Information 1.3.1 Sediment Chemistry, Toxicity and Benthic Community Data A number of investigations have been conducted to obtain information about the environmental quality of surface water and sediment in Skagway Harbour. The locations of historical samples are provided in Figures 2 and 3 and an overview of the types of data collected is provided in Table 1. 17 April 2017 Report No. 1657231-002-R-Rev1 1 ORE BASIN SAMPLING AND ANALYSIS PLAN Table 1: Types of Data Collected During Historical Investigations in the Vicinity of the Ore Basin Sediment Chemistry Water Toxicity Tissue Benthic Document (Surface Grabs / Cores) Chemistry AVS Testing Chemistry Community Metals Hydrocarbons Grain Size