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EPA PA-SI Rpt., Dec, 2005.Pdf PRELIMINARY ASSESSMENT/SITE INSPECTION REPORT Upper Row River Watershed Lane County, Oregon TDD: 04-05-0008 Submitted To: Ken Marcy, Task Monitor U.S. Environmental Protection Agency 1200 Sixth A venue Seattle, WA 98101 Prepared By: Weston Solutions, Inc 190 Queen Anne Avenue North, Suite 200 December 2005 Contract No.: 68-S0-01-02 Weston Work Order No.: 12644-001-002-0161-00 Weston Document Control No.: 12644-001-002-ABAR 05-0220.doc TABLE OF CONTENTS Section 1. INTRODUCTION ............................................................................................................. 1-1 2. SITE BACKGROUND AND PROBLEM DEFINITION ............................................. 2-1 2.1 SITE DESCRIPTION AND BACKGROUND INFORMATION ......................... 2-1 2.1.1 Site Location ............................................................................................ 2-1 2.1.2 Potential Mercury Sources and Site History ............................................ 2-2 2.1.3 Mercury Species, Fate, and Transport ..................................................... 2-5 2.2 PREVIOUS SITE INVESTIGATIONS ................................................................. 2-5 2.3 PROBLEM DEFINITION AND PROJECT SCOPE ............................................. 2-7 3. FIELD ACTIVITIES AND ANALYTICAL METHODS ............................................. 3-1 3.1 RECONNAISSANCE AND SAMPLING ACTIVITIES ...................................... 3-1 3 .1.1 Sources (Mine/Prospect Sites and Altered Rock) .................................... 3-1 3 .1.2 Target Sampling ....................................................................................... 3-3 3 .1.3 Background Samples ............................................................................... 3-3 3.2 SAMPLING METHODS ........................................................................................ 3-4 3 .3 ANALYTICAL METHODS .................................................................................. 3-5 3.4 SAMPLE GLOBAL POSITIONING SYSTEM LOCATIONS ............................. 3-5 3.5 SAMPLE HANDLING AND CUSTODY ............................................................. 3-5 3.6 SAMPLE IDENTIFICATION NUMBERS ........................................................... 3-5 4. QUALITY ASSURANCE/QUALITY CONTROL ....................................................... 4-1 4.1 SATISFACTION OF DATA QUALITY OBJECTIVES AND CRITERIA FOR MEASUREMENT DATA ............................................................................. 4-2 4.2 QUALITY ASSURANCE/QUALITY CONTROL SAMPLES ............................ 4-2 4.3 PROJECT-SPECIFIC DATA QUALITY OBJECTIVES ...................................... 4-3 4.3. I Precision ................................................................................................... 4-3 4.3 .2 Accuracy .................................................................................................. 4-3 4.3 .3 Representativeness ................................................................................... 4-4 4.3 .4 Comparability .......................................................................................... 4-4 4.3 .5 Completeness ........................................................................................... 4-4 4.4 LABORATORY QUALITY ASSURANCE/QUALITY CONTROL PARAMETERS ...................................................................................................... 4-5 4.4.1 Holding Times ......................................................................................... 4-5 4.4.2 Initial Calibration ..................................................................................... 4-5 4.4.3 Blank Sample Results .............................................................................. 4-5 4.4.4 Calibration Check Sample Analysis ........................................................ 4-5 4.4.5 Laboratory Control Sample Analysis ....................................................... 4-6 4.4.6 Inductively-Coupled Plasma/Atomic Emission Spectroscopy- Interference Check Sample Analysis ....................................................... 4-6 4.4.7 Inductively-Coupled Plasma /Mass Spectrometry-Interference Check Sample Analysis ........................................................................... 4-6 05~0220.doc Ill 22 Dccc1nbcr 2005 Prelilnina1y Assess1nent and Site Inspection Report~ Upper Row River Watershed Table of Contents TABLE OF CONTENTS (Continued) Section 4.4.8 Internal Standards Analysis ..................................................................... 4-6 4.4.9 Duplicate Sample Analysis ...................................................................... 4-6 4.4.10 Matrix Spike Sample Analysis ................................................................. 4-6 4.4.11 Serial Dilutions ........................................................................................ 4-7 4.4.12 Detection Limits ....................................................................................... 4-7 4.4.13 Other Data Assessment ............................................................................ 4-7 5. ANALYTICAL RESULTS REPORTING AND BACKGROUND SAMPLES ......... 5-1 5.1 ANALYTICAL RESULTS EVALUATION CRITERIA ...................................... 5-1 5.2 BACKGROUND SAMPLE LOCATIONS AND ANALYTICAL RESULTS ............................................................................................................... 5-1 6. POTENTIAL SOURCE CHARACTERIZATION ....................................................... 6-1 6.1 SOURCE SOILS (WASTE ROCK AND TAILINGS) .......................................... 6-1 6.1.1 Source Quantity ....................................................................................... 6-1 6.1.2 TAL Metals Results ................................................................................. 6-1 6.1.3 Total Mercury and Mercury Speciation Results ...................................... 6-1 6.2 CHAMPION MINE UPPER POND SURF ACE WATER .................................... 6-2 6.3 ALTERED ROCK .................................................................................................. 6-2 6.3. l TAL Metals Results ................................................................................. 6-2 6.3.2 Mercury Speciation Results ..................................................................... 6-2 7. MIGRATION/EXPOSURE PATHWAYS AND TARGETS ....................................... 7-1 7.1 GROUNDWATER MIGRATION PATHWAY .................................................... 7-1 7.2 SURFACE WATER MIGRATION PATHWAY AND ANALYTICAL RESULTS ............................................................................................................... 7-1 7.2.1 Sediment TAL Metals Analytical Results ............................................... 7-2 7.2.2 Sediment Total Mercury, Methylmercury, and Mercury Speciation Results ...................................................................................................... 7-2 7.2.3 pH Measurement Results ......................................................................... 7-3 7.3 SOIL EXPOSURE PATHWAY ............................................................................. 7-3 7.4 AIR MIGRATION PATHWAY ............................................................................. 7-3 8. SUMMARY AND CONCLUSIONS ............................................................................... 8-1 9. REFERENCES .................................................................................................................. 9-1 APPENDIX A LITERATURE EXCERPTS APPENDIXB PHOTO LOG 05~0220.doc IV 22 Dccc1nber 2005 Prelimina1y Assess1nent and Site Inspection Report- Upper Ro}v River Watershed Table of Contents TABLE OF CONTENTS (Continued) Section APPENDIXC FIELD SAMPLING FORMS APPENDIXD DATA VALIDATION MEMORANDA \. 05-0220.doc v 22 December 2005 Prelilnina1y Assessn1ent and Site Inspection Report-Upper Rolv River Watershed Table a/Contents LIST OF FIGURES Figure Title 1-1 Site Location Map 2-1 Sample Location Map 7-1 4-Mile Target Distance Limit (TDL) Map 7-2 15-Mile Target Distance Limit (TDL) Map LIST OFTABLES Table 2-1 Mines and Prospects Selected for Reconnaissance and Sampling 3-1 Sample Information Summary 6-1 Results Summary for Sourc.e Soil Samples 6-2 Results Summary for Champion Mine Upper Pond Surface Water 6-3 Results Summary for Rock Samples 7-1 Results Summary for Sediment Samples 7-2 Population and Wetland Acreage within a 4-Mile Radius 05-0220.doc Vl 22 December 2005 Prelimina1y Assess1nent and Site Inspection Report-Upper Row River Watershed List ofAcronyms LIST OF ACRONYMS Acronym Definition AMD acid mine drainage bgs below ground surface BMD Bohemia Mining District BRL Brooks Rand, LLC CAS Cascade Earth Sciences CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CERCLIS Comprehensive Environmental Response, Compensation, and Liability Information System cfs cubic feet per second CLP Contract Laboratory Program CLP AS Contract Laboratory Program Analytical Services coc Contaminant of Concern CRQL Contract Required Quantitation Limit CVAA Cold Vapor Atomic Absorption CVAFS Cold Vapor Atomic Fluorescence Spectroscopy cy cubic yard DQI Data Quality Indicator DQO Data Quality Objective EPA United States Environmental Protection Agency GPS Global Positioning System gpm gallons per minute HRS Hazard Ranking System LCS Laboratory Control Sample IDW Investigation-Derived Waste ILM Inorganic Laboratory Method MQO Method Quality Objective mg/kg milligrams
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