Chittenden Mills Beverage 39 Vermont Route 15 Jericho, Vermont
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Chittenden Mills Beverage 39 Vermont Route 15 Jericho, Vermont VTDEC #94-1594 KAS #410040018 CORRECTIVE ACTION PLAN March 10, 2016 Prepared for: Champlain Oil Company, Inc. P.O. Box 2126 South Burlington, Vermont 05407 (802) 864-5380 Corrective Action Plan Chittenden Mills Beverage, Jericho, Vermont CERTIFICATION The contents of this Corrective Action Plan for the Chittenden Mills Beverage property located in Jericho, Vermont, SMS #94-1594, was prepared in accordance with the Vermont Department of Environmental Conservation Investigation and Remediation of Contaminated Properties Procedure (IROCP), dated April 5, 2012. Prepared by: 03/10/2016 Rebecca Treat Date Project Geologist Reviewed by: 03/10/2016 Jeremy Roberts Date Environmental Programs Manager i Corrective Action Plan Chittenden Mills Beverage, Jericho, Vermont EXECUTIVE SUMMARY A Corrective Action Plan (CAP) has been prepared to address remediation of subsurface petroleum contamination at the Chittenden Mills Beverage property (Vermont Department of Environmental Conservation Site #94-1594) located at 39 Vermont Route 15 in Jericho, Vermont (hereinafter the “Site”). The contents of this CAP have been prepared in accordance with the Vermont Department of Environmental Conservation (VTDEC) Investigation and Remediation of Contaminated Properties Procedure (IROCP), dated April 5, 2012. The CAP was developed by KAS, Inc. (KAS) on behalf of Champlain Oil Company, Inc. (COCO), owner of the property. COCO continues to insist that contamination at the Site was caused by a third party (Agway Petroleum) and COCO should not be held responsible for the third party’s actions or negligence regardless of the financial solvency of the third party. Active remediation at the Site has been deemed warranted due to significant dissolved and adsorbed phase subsurface contamination, the presence of light non-aqueous phase liquid (LNAPL) beneath the Site acting as a continued source to the adsorbed and dissolved phase contamination, the potential off-Site migration of the dissolved phase contaminant plume and given current passive product recovery efforts will likely take several years to eliminate LNAPL in the subsurface. Although corrective action is warranted, the subsurface contamination is not posing a direct or an immediate threat to the on-Site business or people living or working on adjacent properties. The contamination is at depth so there is no pathway to direct contact or ingestion of the contamination and there is sufficient distance from the contamination and the onsite building so the potential for vapor intrusion is low. Per VTDEC direction, KAS investigated the feasibility of the BOS 200® carbon injection in-situ remedial approach for the Site. With VTDEC approval, KAS worked with AST Environmental (BOS 200® authorized distributor) to develop a carbon injection in-situ remedial approach for the Site with a primary objective of eliminating LNAPL in the subsurface and a secondary objective of reducing dissolved phase contaminant concentrations to levels below VGES. BOS 200® is a proprietary blend of powdered/granulated carbon, calcium, gypsum (sulfate source), nitrate, phosphate and ammonia. The product is injected into the subsurface as a slurry (mixed with water and a facultative blend of microbes) and traps petroleum contaminants via carbon adsorption. Once contamination is adsorbed onto BOS 200® particles, treatment occurs via biological degradation as the product incorporates both aerobic and anaerobic biological processes. The injection activities are anticipated to take place in early May 2016 over a 2-day period and occur during the standard work week and daytime hours (Monday-Friday, 7am-6pm). Every effort will be made to minimize disruption to the on-site business operation and flow of traffic on the property. Installation of additional groundwater monitoring wells in the vicinity of the property will take place approximately two weeks following injection activities. Monitoring of the groundwater in the vicinity of the Site will occur one month following injection activities and on a quarterly basis thereafter for a period of 12 months. AST Environmental estimates the Site will achieve primary and secondary objectives within 6-9 months and 12-18 months, respectively. As such, the monitoring frequency will be reevaluated after the 13 month post-injection period. ii Corrective Action Plan Chittenden Mills Beverage, Jericho, Vermont Table of Contents PROFESSIONAL ENGINEER’S CERTIFICATION ................................................................................ i EXECUTIVE SUMMARY .................................................................................................................... ii 1.0 Introduction ........................................................................................................................... 1 2.0 Site Background ..................................................................................................................... 1 2.1 Description ..................................................................................................................................... 1 2.2 Adjacent Property Use and Landowners ....................................................................................... 1 2.3 Geologic Setting ............................................................................................................................ 2 2.4 Site History ..................................................................................................................................... 2 2.5 Statement of Problem .................................................................................................................... 3 2.6 Sensitive Receptors ........................................................................................................................ 3 3.0 Supplemental Investigation ................................................................................................... 4 3.1 Soil Borings/Temporary Well Installation ....................................................................................... 4 3.2 Soil Screening Results .................................................................................................................... 5 3.3 Soil Sampling and Laboratory Analysis .......................................................................................... 5 3.4 Determination of Groundwater Flow Direction and Gradient ...................................................... 6 3.5 Groundwater Sampling and Laboratory Analysis .......................................................................... 6 3.6 Contaminant Transport and Distribution ....................................................................................... 6 3.7 Contaminant Mass .......................................................................................................................... 7 4.0 Preliminary Corrective Action Implementation Details .......................................................... 7 4.1 Active Remedial Measures ............................................................................................................. 7 4.2 Baseline Sampling .......................................................................................................................... 7 4.3 Injection Design .............................................................................................................................. 8 4.4 Health and Safety Plan (HASP) Revision ........................................................................................ 9 4.5 Monitoring Well Installation ........................................................................................................... 9 4.6 Site Monitoring ............................................................................................................................. 10 4.7 Reporting ...................................................................................................................................... 10 4.8 Contractors and Sub-Contractors ................................................................................................ 11 4.9 Permits/Approval ......................................................................................................................... 11 5.0 Schedule .............................................................................................................................. 11 6.0 Cost Estimate ...................................................................................................................... 12 iii Corrective Action Plan Chittenden Mills Beverage, Jericho, Vermont Appendices Appendix A Site Maps 1) Site Location Map 2) Area Map 3) Site Map 4) Groundwater Elevation Map 5) Soil Contaminant Concentration Map 6) Groundwater Contaminant Concentration Map 7) Carbon Injection Layout Map Appendix B Soil Boring Logs/Photographic Documentation Appendix C Geologic Cross Section Appendix D Soil Quality Summary Data Appendix E Liquid Level Monitoring Data Appendix F LNAPL Thickness/Recovery Amounts Appendix G Groundwater Quality Summary Data Appendix H Analytical Results Electronic Data Deliverable (GW and Soil) Appendix I Work Elements and Schedule Appendix J Public Notice Appendix K Health and Safety Plan Appendix L Cost Estimate iv Corrective Action Plan Chittenden Mills Beverage, Jericho, Vermont 1.0 Introduction This Corrective Action Plan (CAP) has been prepared to address remediation of subsurface petroleum