Topics C-17 BED DOWN AREA C-17 HANGAR DEVELOPMENT PLAN. McGuire Air Force Base Restoration Program Site # SS-24. Interim Remedial Action

Transcription

1 McGuire Air Force Base Restoration Program Site # SS-24 Topics Interim Remedial Action John G. Pohl, Restoration Program Manager NJDEP Triad Approach Meeting September 4 th, History of McGuire Restoration Site # SS-24 FASTRAC SS-24 Interim Remedial Action Summary 2 MCGUIRE AFB, NJ WRIGHTSTOWN, NJ C-17 BED DOWN AREA C-17 HANGAR DEVELOPMENT PLAN COOKSTOWN, NJ 3 September

2 PROBLEM Dock 2240 Wash rack C-17 HANGAR MILCON 5 6 C-17 Hangar Footprint N BUILDING 2227 Bldg 2227 Dock 40 Separator 2227 APPROIMATE AOC BOUNDARY APPROIMATE HANGAR BOUNDARY BUILDING 2240 Dock 2240 Wash rack 7 September

3 ISSUES FEB 03 - Geoprobe Sample taken at the former Building 2227 site, revealed high levels of organic contaminants & breakdown products in groundwater in this area. Building 2240 Demolition 9 Tetrachloroethene (PERC) at a maximum concentration of 13,754 µg/l Regulatory Level 1µg/L 10 BLDG THE PIT BLDG BLDG BLDGS 2240 & September

4 FAST TRACK PLAN 01 APR 03 - Expeditiously characterize this site and develop a remedy Proceed with constructing the hangar on the site. SS-24 Interim Assessment and Remedial Action Tasks Secure/Realign Funding Develop SOW Award Contract Develop Work Plan Secure Regulator Approval of Work Plan Complete Characterization Develop Interim Removal Action Plan Secure Regulator Approval of IRA Plan Execute IRA Incorporates key elements from other expedited assessment methods High level of key stakeholder interaction Requires experienced Technical Team (FTT) empowered to make decisions in the field Completes projects faster, cheaper, and with greater regulatory satisfaction September

5 Jan 03- Demolition Jan 29 th GW sampling 2003 Timeline Feb 28 th Stop Work Jun 6 th MILCON Resumes Apr 28 th Interim Remedial Investigation (IRI) begins Sep 3 rd ES&H Oversight of Aug 29 th MILCON Interim Remedial Action Complete 17 C-17 Interim Characterization &Interim Remedial Action SS24 Interim Assessment and Remedial Action, McGuire AFB, NJ Fastrac Technical Team Science Applications International (SAIC) Hayworth Engineering Science, Tri-Corder 18 Triad Approach Triad approach requires a tool box of site assessment tools DQO process ideal for Systematic Planning Numerous field analytical methods available Data quality adequate to support decisions Effective data manage largest uncertainty: Contaminant heterogeneity or sample representative ness Soil and groundwater sampling tools: CPT discrete soil and GW samplers Percussion direct push discrete soil and GW samplers MIP subsurface VOC sampler Soil and GW analytical tools FID/PID/ECD for MIP VOCs DSITMS for VOCs in discrete soil and GW Off site lab for VOCs in selected discrete soil and GW 19 September

6 The problem: McGuire AFB, NJ C17 Hanger Site Investigation Construction of a new hanger for C17 aircraft delayed by recently discovered potential Cl solvent source. Very limited GW sampling indicated up to 1% of solubility limit PCE Same data indicated limited distribution of shallow dissolved phase Apparent dechlorination underway at site Construction to resume in June Sampling points Jan 19, 2003 CSM Jan 19, 2003 BLDG BLDG 5.0 ppb DCE 6.8 ppb VC ppb PCE* 2360 ppb TCE 840 ppb DCE 67 ppb VC BLDGS 2240 & McGuire AFB, NJ C17 Hanger Site Investigation CSM Mar 12 th, 2003 Sampling points March 12 th, APR September

7 MIP Results CPT & DPT Soil Sampling with DSITMS Analysis Site work began 28 Apr 03 Boundary of MIP ECD Detects CSM Field day 09 CSM Field day SITE STRATIGRAPHY 2227 CPT & DPT Groundwater Sampling with DSITMS Analysis High conductivity zones GW CSM Groundwater Flow Developed Field day September

8 Combined Soil & Groundwater Results 14 field days 15 MIP penetration 15 Geophysical CPT penetrations >20 continuous soil core logged Likely source leak areas Data collected using DSITMS and EPA Method soil sampling locations, 234 discrete soil analyses 45 GW sampling locations, 162 discrete GW analyses 244 QC analyses High-probability plume zone Jan 03- Demolition Jan 29 th GW sampling 2003 Timeline Feb 28 th Stop Work Jun 6 th MILCON Resumes Apr 28 th Interim Remedial Investigation (IRI) begins Sep 3 rd ES&H Oversight of Aug 29 th MILCON Interim Remedial Action Complete Low-probability plume zone GROUNDWATER ECLUSION ZONE SOIL REMOVAL LOCATIONS 270 ft North North 40 ft 115 ft 80 ft 240 ft 130 ft 45 ft 140 ft C17 Hanger Footprint C17 Hanger Footprint Exclusion Area, Groundwater Scale (ft) Soil Excavation Zone Exclusion Area, Soil Scale (ft) September

9 Proposed NA Well Locations STATUS Performance Evaluation Well Cluster LTM Well Cluster NA Wells installed inside Hangar floor High-probability plume zone Low-probability plume zone Tasks (As of 2 AUG 03) Secure/Realign Funding Develop SOW Award Contract Develop Work Plan Secure Regulator Approval of Work Plan Complete Characterization Develop Interim Removal Action Plan Secure Regulator Approval of IRA Plan Execute IRA SUMMARY Keys to project success: Total Restoration Approach Outstanding teamwork Excellent communications Synergistic teaming between the AF, regulators and the FTT Common goal Trust Motivated A-Team across the board Top cover from command September