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ATTACHMENT A Annual Remedial Action Progress Report Table of Content 1.0 Overview 2.0 Site-Wide Groundwater Monitoring Results 2.1 Groundwater Level Measurements 2.2 Groundwater Sampling 2.2.1 Volatile Organic Compound Analysis 2.2.2 Monitored Natural Attenuation Parameter Analysis 3.0 Groundwater Treatment System Performance and Compliance Monitoring Results 3.1 Treatment Facillity #1 3.1.1 Recovery Well Performance 3.1.2 Treatment System Performance and Compliance 3.2 Treatment Facillity #2 3.2.1 Recovery Well Performance 3.2.2 Treatment System Performance and Compliance 4.0 Summary and Recommendations List of Tables 2-1 Monitoring Well Construction and Groundwater Level Measurements 2-2 Summary of Groundwater CVOC Data 2-3 Summary of Southern Plume Groundwater MNA Parameter Data 3-1 Summary of Recovery Well Groundwater Influent CVOC Data and Estimated Mass Removal Rates – Facility #1 3-2 Summary of TPDES Permit Equivalency Compliance Data – Facility #1 3-3 Summary of Air Pollution Control Permit Equivalency Compliance Data – Facility #1 3-4 Summary of Recovery Well Groundwater Influent CVOC Data and Estimated Mass Removal Rates – Facility #2 3-5 Summary of TPDES Permit Equivalency Compliance Data – Facility #2 3-6 Summary of Air Pollution Control Permit Equivalency Compliance Data – Facility #2 List of Figures 1-1 Groundwater Treatment Facility #1 – Schematic and Sample Locations 1-2 Groundwater Treatment Facility #2 – Schematic and Sample Locations 2-1 Site-Wide Groundwater Elevations and CVOC Concentrations 2-2 Groundwater CVOC Concentration vs. Time – Steele Supply Well 2-3 Groundwater CVOC Concentration vs. Time – Laplace Supply Well 3-1 Influent CVOC Concentrations and Mass Removed vs. Time – Facility #1 – RW-7 & RW-9 3-2 Influent CVOC Concentrations and Mass Removed vs. Time – Facility #1 – RW-6 3-3 Influent CVOC Concentrations and Mass Removed vs. Time – Facility #2 – RW-1S List of Appendices A Annual Groundwater Monitoring Event Analytical Data and Validation Reports B Continuous Groundwater Level Measurement Data and Precipitation Data C Groundwater Sampling Well Stabilization Records D Backup Calculations: Figures 3-1 & 3-2 – Influent CVOC Concentrations and Mass Removed vs. Time – Facility #1 E Backup Calculations: Figure 3-3 – Influent CVOC Concentrations and Mass Removed vs. Time – Facility #2 List of Acronyms amsl above mean sea level C Celsius cf cubic feet cis-1.2-DCE cis-1,2-dichloroethene CLP Contract Laboratory Program CVOC chlorinated volatile organic compound DCN document control number DO dissolved oxygen DPNR U.S. Virgin Islands Department of Planning and Natural Resources EFF effluent EPA United States Environmental Protection Agency ft feet g gram GAC granular activated carbon gal gallon gpm gallons per minute GS ground surface GW groundwater GW1 groundwater treatment facility #1 GW2 groundwater treatment facility #2 ID identification INF influent ITP Initial Testing Program J result is estimated J+ result is estimated and may be biased high K result is estimated and may be biased high L liter lb pound LTRA long-term response action MCL Maximum Contaminant Level μg/L microgram per liter mg/L milligram per liter min minute MNA monitored natural attenuation mol mole mS/cm milli-Siemens per centimeter mV millivolts MW monitoring well NA not available/applicable NS not sampled O&M operation and maintenance OIT operator interface terminal ORP oxidation reduction potential PCE tetrachloroethene PLC programmable logic controller PP potassium permanganate unit ppbv parts per billion by volume ppmv parts per million by volume Q quarter QA quality assurance QAPP quality assurance project plan QC quality control RA remedial action RD remedial design RW recovery well scfm standard cubic feet per minute SOP standard operating procedures SU standard unit SVE soil vapor extraction T temperature TCE trichloroethene TOC top of casing TOC total organic carbon TOS top of screen TPDES Territorial Pollutant Discharge Elimination System Trans-1,2-DCE trans-1,2-dichloroethene TSS total suspended solids U non-detect UPS uninterruptible power supply USVI United States Virgin Islands VC vinyl chloride VOC volatile organic compound WAPA U.S. Virgin Islands Water and Power Authority Y year