1. Saxe Middle School Renovation
Management of Hazardous Building Materials
Presented by:
Amy Vaillancourt, Licensed Environmental Professional – Tighe & Bond
October 12, 2016

2. Background Summary of Work 2014-2016
Inspected Auditorium for Hazardous Building Materials Remediation Project
EPA and DEEP Notification of PCBs in building materials and approval of PCB Cleanup Plan
Received approval from State for bidding Saxe Auditorium Remediation Project work in Spring 2015 and Saxe Middle School Building Project Addition and Renovation work in Spring 2016
Summer 2015: Began abatement of PCB containing materials
Summer 2016: Abatement of PCB containing materials continued

3. PCB Containing Materials
PCB < 50 parts per million (ppm)
Various paints on doors, walls, and ceiling in Auditorium
Caulking around doors in Auditorium and music rooms
Fire stop caulk above ceiling in music practice room
Tan paint on concrete wall in corridor behind stage and mezzanine stairwell
Auditorium seat cushions
PCB > 50 ppm
Black paint on concrete block wall along back of stage
Gray paint on floors in Auditorium, mezzanine/stairwell, ceramics room, and boiler room
Tan paint on a portion of metal duct (25 SF) in Auditorium mechanical room

4. Abatement 2015 Summary Scope of Work Project Work Performed by:
Contractor: Standard Demolition Services
Project Monitor: Tighe & Bond
Scope of Work
Removal of PCB containing materials from Auditorium, mezzanine/stairwell, and mechanical room.
Removal of paint from ceramics room floor and encapsulation of remaining concrete.
Confirmatory sampling (dust wipes, air samples, and bulk samples of remaining substrates)

5. Abatement 2016 Summary Scope of Work
Project Work Performed June through August by:
Contractor: Niram
Project Monitor: Tighe & Bond
Scope of Work
Removal of PCB containing materials from mezzanine/stairwell, wall behind stage, and corridor
Removal of “assumed” PCB containing materials in areas associated with Renovation/Addition.
Encapsulation of remaining concrete surfaces (Auditorium, mezzanine stairwell, mechanical room, corridor, and stage.
Confirmatory sampling (dust wipes, air samples, and encapsulation wipes)

6. Encapsulation
PCBs have leached from source paint materials into underlying concrete floors and walls.
Removal of concrete substrate materials was conducted via scarification to depths feasible without damaging integrity of walls and floors (1/8” to 1/2“). However, the cleanup standard of < 1 ppm PCBs could not be achieved. Concentrations of PCBs remaining are as follows:
Auditorium floor = 1.0 to 15 ppm with one sample at 59 ppm
Ceramics room floor = 1.3 to 8.7 ppm with one sample at 20 ppm
Stage wall = 2.4 to 6.9 ppm
Auditorium mechanical room wall = 1.9 to 4.5 ppm with one sample at 17 ppm
Mezzanine/stairwell floor = 10 to 72 ppm with one sample at 130 ppm
Mezzanine/stairwell walls = 3.3 to 15 ppm
Corridor wall = ND to 2.7 ppm
These areas have been encapsulated with Sika 62 Epoxy Sealant in accordance with the EPA and DEEP Approved Plan

7. Abatement 2016 Confirmatory Sampling Results for PCBs
22 dust wipe samples from containments and encapsulated surfaces. Needed to achieve < 0.5 ug/cm2 for clearance. All samples were “non-detect”.
33 bulk substrate samples from floors and walls where PCB containing materials were removed. Needed to achieve < 1 ppm clean up standard. Areas where 1 ppm could not be achieved – encapsulation was completed.
11 air samples collected. Needed to achieve < 300 ng/m3 for re-occupancy.
Highest result was 22 ng/m3 in East Wing of Auditorium
Asbestos Abatement
During renovation activities asbestos containing materials were encountered and removed under full containment in accordance with DPH regulations. Air Clearance sampling was completed for each area.
Tar over stage concrete slab (removed)
Exterior tar (waterproofing) on foundation at stairwell (to be removed)
Flashing Paper in wall cavity of west wing stair in Auditorium (removed)

8. Fall 2016 – 2017 Abatement Plan
Removal of gray paint from boiler room floor and walls with encapsulation of substrates (if necessary). Also cleaning of boiler room floor drains and sump.
Removal of fire stop caulk and door caulk in music rooms
Management of all painted surfaces and caulking compounds to be impacted by renovations as PCB containing materials (removal under full containment)
Abatement of Asbestos containing waterproofing (exterior)
Confirmatory wipe sampling, bulk sampling of remaining concrete, and air sampling for re-occupancy
Continued Public Outreach
Deed Notice and Annual O&M for encapsulated areas

9. Long-Term Operations & Maintenance
Training of staff
Routine maintenance, observations, and documentation
Corrective measures (if necessary – additional encapsulation)
Annual Inspections and Sampling
Visual inspections
PCB wipe and air samples
Documentation and reporting
Outreach/Communication
Teachers, parents, staff, DEEP, and EPA

10. PCB Information Sources
CTDEEP – PCB Program
EPA – PCB Information
On-line articles for Connecticut Schools dealing with PCB issues
remedies
(Guilford High School)