IRM 4 A IRM 5 Football Field Complex

IRM 4 A & IRM 5: Football Field Complex Remedy Interim Remedial Measure Construction Fall 2020 Former Sperry Remington Site at Elmira High School NYSDEC ID # C 808022 Public Availability Session December 2020

Football Field Complex (FFC) Remedial Strategy FFC Pre-Design Investigation Summary Proposed Remedy (July 2018 – September 2020) • Interim Remedial Measure (IRM) – Fall 2020 • Detection of PCBs, metals, PAHs and VOCs in shallow soils above screening criteria • Detection of PCBs, metals, PAHs and VOCs in soils above screening criteria for protection of groundwater • Detections of PCBs above hazardous waste criteria in soil • Detection of PCBs, metals and VOCs in on-site groundwater in areas with no buildings • Characterize extent, integrity and contents of former industrial sewer and detections of PCBs above hazardous waste criteria in sewer contents. No evidence of release to surrounding soils • Soil Removal and Off-Site Disposal • • Prevent potential exposure to contamination in surface and shallow soils Excavation of subsurface soils above Site Cleanup Standards • Former Industrial Sewer Removal • Cover System Construction • Institutional Controls (to prevent exposure to soil, groundwater and soil vapor) • Site Management Plan • Groundwater Use Restrictions • Prevent potential exposure & use of groundwater • Cover System Maintenance • Prevent potential exposure to contamination remaining in underlying soils • Vapor Intrusion Evaluation (Future Construction) • Prevent potential exposure via vapor intrusion • Groundwater Monitoring

Fall 2020 IRM Construction • Plans have been submitted to NYSDEC for IRM construction at EHS in Fall 2020 • IRM #4 Amendment #1 (IRM #4 A) (September to October 2020) • Excavation Volume: 10, 383 CY • Off-Site Hazardous Waste Disposal: 4, 200 tons • Off-Site Non-Hazardous Waste Disposal: 3, 850 tons • IRM #5 (Starts December 2020) • Excavation Volume: 18, 375 CY • Off-Site Hazardous Waste Disposal: 4, 850 tons • Off-Site Non-Hazardous Waste Disposal: 11, 400 tons • Removal of Former Industrial Sewer IRM #5 Former Combined Industrial Sewer Removal (in pink) IRM #5 Excavation (in grey) IRM #4 A Excavation (in red)

IRM 4 A & 5 Excavation Plan (0. 17’- 2’ Interval) 0. 17 -2 ft bgs

IRM 4 A & 5 Excavation Plan (2 -4’ Interval) 2 -4 ft bgs

IRM 4 A & 5 Excavation Plan (4 -6’ Interval) 4 -6 ft bgs

IRM 4 A & 5 Excavation Plan (6 -8’ Interval) 6 -8 ft bgs

IRM 4 A & 5 Excavation Plan (8 -10’ Interval) 8 -10 ft bgs

IRM 4 A & 5 Excavation Plan (10 -12’ Interval) 10 -12 ft bgs

IRM 4 A & 5 Excavation Plan (12 -14’ Interval) 12 -14 ft bgs

IRM 4 A & 5 Excavation Plan (14 -16’ Interval) 14 -16 ft bgs

Community Air Monitoring Ambient Air Monitoring • Additional monitors upwind and downwind of excavation, stockpiling and loading activities • Samples will be collected for PCB analyses when soils with PCBs > 50 mg/kg are handled. • Tisch (PCB) air monitoring locations including air intakes on top of EHS building • Results will be posted weekly to the NYSDEC web site. Current Data: http: //nydec-elmira. s 3 -website-us-east 1. amazonaws. com/list. html? prefix=IRM%204 A/Air%20 Monitoring/ Dust (PM 10) Monitoring • Monitors placed at CAMP locations at the Site perimeter • Dust levels measured continuously • Readings are available in realtime with telemetry • Notifications sent when dust levels exceed action levels

Truck Routes for Off-Site Disposal • Trucks will enter and exit the Site between the hours of 7: 00 AM and 5: 00 PM except during student arrival (7: 45 – 8: 30 AM) and departure (2: 30 – 3: 15 PM) when school is in session. • No truck traffic will occur outside those hours without prior notification of NYSDEC.

IRM Construction – Protecting Workers, the Community and the Environment Worker Safety Community Safety Dust control during excavation, stockpiling and loading of soil Personal Protective Equipment (PPE): • Hard hat • Steel-toed boots • Safety glasses • Gloves • High-viz clothing • Training Excavated soil is covered prior to proper disposal All equipment is decontaminated before leaving the site Traffic control on/off S Main Street Environmental Protection Silt fence to prevent runoff from disturbed areas Storm sewers protected from debris during construction

Covid-19 Precautions Site activities are Essential Services Covid-19 Response Plans have been prepared and NYS guidance for Essential Workers is followed Site workers – use of appropriate testing, face coverings, temperature checks, sanitary measures & social distancing