Shemyaafr,Alaska 1992IRPFIELD INVESTIGATIONREPORT
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EM0-1096 VOL 1 ShemyaAFR,Alaska 1992IRPFIELD INVESTIGATIOREPN ORT Volume 1 of 4 TECHNICAL .., FINAL February1993 preparedfor U.S.Air Force IO ElmendorfAFB,Alaska 11th AirControlWing 1lth CivilEngineeringOperationsSquadron UnderContractDEU-91-06 Preparedby CH2MHILL RC.Box8748 Boise,Idaho83707 For EnvironmentalManagementOperations Undera RelatedServicesAgreement withtheU.S.Departmentof Energy EnvironmentalManagementOperations Richland,Washington99352 j OtSTR|BUTIOPJ 0_:: ii-tIU L_OCuiviENT iL, ',..;;'-,_;;;.,.';,:{:1;" ,. FINAL I i i NOTICE i This report has been prepared for the United States Air Force by CH2M HILL for the purpose of aiding in the implementation of a final remedial action plan under the Air Force Installation Restoration Program (IRP). As the report relates to actual or possible releases of potentially hazardous substances, its release prior to an Air Force final decision on remedial action may be in the public's interest. The limited objectives of this report and the ongoing nature of the IRP, along with the evolving knowledge of site conditions and chemical effects on the environment and health, must be considered when evaluating this report, since subsequent facts may become known which may make this report premature or inaccurate. Acceptance of this report in performance of the contract under which it is prepared does not mean that the Air Force adopts the conclusions, recommendations or other views expressed herein, which are those of the contractor only and do not necessarily reflect the official position of the United States Air Force. Government agencies and their contractors registered with the Defense TechnicalInformationCenter (DTIC) should direct requestsfop copies of.this report to: Defense Technical InformationCenter (DTIC), Cameron Station,Alexandria, VA 22304-6145. Nongovernment agencies may purchase copies of this document from: NationalTechnicalInformationServices (NTIS), 5285 Port Royal Road, Springfield,VA 22161. DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Governmentnor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsi- bility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Refer- ence herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recom- mendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. O 10010D5F.BOI/]c 26 February 1993 FINAL CONTENTS 0 EXECUTIVE SUMMARY ............................................ xvi 1.0 INTRODUCTION ............................................ 1.1 1.1 PURPOSE OF THIS REPORT ............................. 1.1 1.2 BACKGROUND ....................................... 1.1 1.2.1 Description and History of Shemya AFB ............... 1.1 1.3 AIR FORCE INSTALLATION RESTORATIONPROGRAM ... ...... 1.7 1.3.1 Introduction .................................... 1.7 1.3.2 History of Installation Restoration Program on Shemya .................................... 1.7 1.3.3 Other Investigations .............................. 1.9 1.4 HISTORYAND ENVIRONMENTAL SETTING ................. 1.11 1.4.1 Physiography .................................. 1.11 O 1.4.2 Cultural Geography ...................... ....... 1.11 1.5 GEOLOGY .......................................... 1.12 1.5.1 Geologic Setting . .............................. 1.12 1.5.2 Bedrock Geology ............................... 1.12 1.5.3 Surficial Geology ............................... 1.15 1.6 HYDROLOGY ........................................ 1.16 1.6.1 Surface Water ................................. 1.16 1.6.2 Groundwater .................................. 1.18 1.6.3 Groundwater Quality ............................ 1.18 1.7 AIR QUALITY ........................................ 1.22 1.8 MINERAL RESOURCES ................................ 1.22 1.9 CULTURAL RESOURCES ............................... 1.23 O 10010,3D4B, OI/ji ii 26 February1993 FINAL CONTENTS (Continued) 1.10 BIOLOGY AND ECOLOGY .............................. 1.23 Q 1.10.1 Communities and Habitats ........................ 1.23 1.10.2 Environmentally Sensitive Areas .................... 1.23 1.10.3 Endangered Species ............................ 1.24 1.10.4 Economic Species .............................. 1.24 1.11 CLIMATOLOGY/METEOROLOGY ......................... 1.24 1.11.1 Precipitation ................................... 1.24 1.11.2 Temperature .................................. 1.25 1.11.3 Wind ........................................ 1.25 1.11.4 Evaporation ................................... 1.25 2.0 1992 FIELD SEASON ........................................ 2.1 2.1 SITES INVESTIGATEDIN 1992 ............................ 2.3 2.1.1 Water Gallery ................................... 2.3 2.1.2 Fire Training Sites ............................... 2.3 2.1.3 •Solid Waste Disposal Sites 2.4 2.1.4 Petroleum SpiliSites " 2.5 " 0 2.2 FIELD METHODOLOGIES USED ........................... 2.6 2.2.1 Geophysics .................................... 2.6 2.2.2 Surface Sampling................................ 2.9 2.2.3 Backhoe Pits ................................... 2.9 2.2.4 Soil Borings .................................... 2.9 2.2.5 Well Points.................................... 2.10 2.2.6 MonitoringWells ............................... 2.10 2.2.7 LakeSampling ................................. 2.10 2.2.8 Surveying .................................... 2.11 2.3 ANALYTICALMETHODS ................................ 2.11 2.4 SAMPLES COLLECTEDAND ANALYZED ................... 2.12 2.5 QUALITYASSURANCE/QUALITYCONTROL ................. 2.12 2.5.1 Data Validation................................. 2.12 2.5.2 Representativeness " 2.15 I ' II I I / 100109D4.BOI/ji iii 26 February 1993 FINAL CONTENTS (Continued) 2.5.3 Comparability .................................. 2.15 2.5.4 Accuracy ..................................... 2.17 2.5.5 Precision .......... , .......................... 2.17 2.5.6 Completeness ................. ...... ......... 2.18 2.5.7 ' Laboratory Blanks .............................. 2.18 2.5.8 Summary of Data Usability ........................ 2.18 2.6 AUDITS PERFORMED ................................. 2.18 2.6.1 Quality Assurance Audits ......................... 2.19 2.6.2 Health and Safety Audit .......................... 2.19 2.7 RISK ASSESSMENT PROTOCOLS ........................ 2.19 2.7.1 Introduction ................................... 2.19 2.7.2 Development of Human Health Preliminary Risk Levels ... 2.20 2.7.3 Development of Ecological Preliminary Risk Levels ...... 2.21 3.0 PHYSICAL CHARACTERISTICSAND NATURE AND EXTENT OF CONTAMINATION .......................................... 3.1 O 3.1 BACKGROUND SAMPLES " 3.1 3.2 WATER GALLERY ..................................... 3.1 3.2.1 Site Background ................................ 3.1 3.2.2 Prgvious Investigations ............................ 3.13 3.2.3 1992 Investigation .............................. 3.16 3.2.4 Nature and Extent of Contamination ................. 3.39 3.2.5 Preliminary Risk Assessment ...................... 3.39 3.2.6 Future Actions ................................. 3.43 3.3 FIRE TRAINING SITE 1: LIGHTNING STRIKE (FT-l) ........... 4.43 3.3.1 Site Background ............................... 3.43 3.3.2 Previous investigations ........................... 3.44 3.3.3 1992 Investigation .............................. 3.47 3.3.4 Nature and Extent of Contamination ................. 3.51 3.3.5 Prelimina_yRisk Assessment ...................... 3.64 3.3.6 Future Actions ................................. 3.64 ii ii 100109D4.BOI/ji iv 26 February 1993 FINAL CONTENTS (Continued) 3.4 FIRE TRAINING SITE 2: AIRCRAFT MOCKUP (FT-2) ........... 3.66 3.4.1 Site Background ............................... 3.66 3.4.2 Previous Investigations. .......................... 3.68 3.4.3 1992 Investigation .............................. 3.68 3.4.4 Nature and Extent of Contamination ................. 3.92 3.4.5 Preliminary Risk Assessment ...................... 3.92 3.4.6 Future Actions ................................. 3.98 3.5 FIRE TRAINING SITE 3: FIRE DEPARTMENTSTRUCTURAL TRAINING AREA (FT-3) ................................ 3.99 3.5.1 Site Backqround ...... ' ......................... 3.99 3,5.2 PreviousI:westigations........................... 3.99 3.5.3 1992 Investigation ............................. 3.100 3,5.4 Nature and Extentof Contamination................ 3.100 3,5.5 PreliminaryRiskAssessment ..................... 3,106 3.5.6 FutureActions ................................ 3.106 3.6 SOLID WASTE SITE SW-4: BARRELDUMP ................ 3.106 3.6.1 Site Background • _............................ 3.106 O 3.6.2 PreviousInvestigations.......................... 3.108 3.6.3 1992 Investigation ............................. 3.108 3,6.4 Nature and Extentof Contamination ................ 3.123 3,6.5 PreliminaryRisk Assessment ..................... 3.124 3,6.6 FutureActions ................................ 3.1;Z4 3.7 SOLID WASTE SITE SW-5: HOSPITALLAKE ............... 3.125 3.7.1 Site Background .............................. 3.125 3,7.2 PreviousInvestigations.........................