Thomas Prince School 170 Sterling Road Princeton, MA 01541

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Presentation transcript:

Thomas Prince School 170 Sterling Road Princeton, MA 01541 PCB Mitigative Measures Environmental Compliance Services, Inc. 997 Millbury Street, Unit G Worcester, MA 01607 Chuck Klingler, LSP, LEP Page Fallon, Ph.D. Robert Palermo, Sc.D., PE, LSP, RPIH, CSP

Overview Background information regarding PCB’s Extent of PCB presence at TPS Occupancy plan Educational plan

Talking Points Historical Use Health Effects Discovery of PCBs in Caulking Sampling Results (Air and Wipe Samples) Proposed Mitigation Plan with EPA Oversight

Historical Use Man made chemical … widely used in plasticizers, caulking, sealant, adhesives, paints, dielectric fluids, etc. Congress banned use in 1976 with phase out in 1978 Present in caulking, glazing, light ballast, mastic in Thomas Prince school PCB migrate from caulking into air, dust, soil and surroundings Man made chemical … widely used in construction materials Congress banned manufacture and use in 1976 with phase out in 1978 Used in masonry columns Light Ballasts Window and door frames Some caulking may contain 100,000 ppm PCB can migrate from caulking into dust, soil and surrounding materials

PCB Health Effects People are exposed by their diets, air and dust levels in older buildings Exposure Routes: Inhalation, skin absorption, ingestion and skin and eye contact Target Organ Effects: Liver, Immune System (decrease in antibodies), Reproductive (reduced BW and BR), Neurological (deficits in development), Endocrine (changes in hormone levels) Animal and epidemiological studies indicate PCB are a probable human carcinogen People are exposed to PCBs from their diets, air and dust levels in buildings Exposure Routes: Inhalation, skin absorption, ingestion and skin and eye contact Target Organ Effects: Liver Damage, Immune System (decrease in antibodies), Reproductive (reduced body weight and birth rates), Neurological (deficits in neurological development), Endocrine (changes in Thyroid hormone levels) Animal and epidemiological studies indicate PCBs are a probable human carcinogens

Discovery of PCBs at Thomas Prince School As part of the MA Green Repair Program school windows are being replaced - Interior Caulking = 105 -173 ppm - Exterior Caulking = 115 - 6,850 ppm - Glazing Sealants = 915 ppm - Concrete/Masonry = 0.111 - 4.720 ppm Driven by MA School Building Energy Efficiency Program Woodard & Curran Site Inspection 6/23 - Replacement of 12 First Floor Courtyard and Rooftop Area Windows - All caulking and glazing sealants contains Asbestos Containing Materials (ACM) All other windows have been replaced within the past several years First Floor and Rooftop Area Windows Sampled on April 27, 2011: - Composite Sample Exterior Caulking = 6,850 ppm - Composite Sample Exterior Glazing Sealant = 915 ppm

Typical First Floor Window Glazing Window Caulking Concrete Masonry

Regulatory Climate Regulated by EPA under TSCA 40 CFR 761 Caulking > 50 ppm is unauthorized use EPA public health levels for PCBs in Indoor Air of 300 ng/m3 (Age 6-12 years)

Occupancy Plan Restrict access to the "older" classrooms until cleaning and further testing are performed Common areas … cafeteria/kitchen, computer Rm., Rm. 113 and library will be restricted until cleaning and further testing are performed A "pilot test" will be performed on Rms. 209 and 106 to evaluate the ability to reduce indoor air concentrations through cleaning   Furniture and teaching materials from 100-200 classrooms will be cleaned, removed, tested and reused in others areas of the school Lighting ballasts will be inspected and replaced as appropriate throughout the "older" building Restrict access to the "older" building and close/secure the classrooms.  The 100 hallway will also be secured.  These will be restricted until cleaning and further testing are performed; The common areas of the cafeteria/kitchen, computer room, Room 113 and the library will be restricted until cleaning and further testing are performed; A "pilot test" will be performed on rooms 209 and 106 that will evaluate the ability to reduce indoor air concentrations through cleaning.  The rooms will be industrially cleaned (i.e. surfaces, vents, heaters, cabinets, etc.) with HEPA vacuum/wet wiping, caulking will be removed as applicable (i.e. windows, external air inlet vent housings) and light ballasts/housings will be inspected/cleaned and replaced as appropriate. The furniture and other teaching materials from the 100-200 block classrooms will be cleaned, removed, tested and reused in others areas of the school. Lighting ballasts and housings will be inspected/cleaned/replaced as appropriate throughout the "older" building.

Plan Going Forward Ongoing Air Monitoring Working with EPA to Reopen Restricted Classrooms Implement EPAs recommended BMPs

Educational Plan Grades 3-5 and Developmental Classroom will be moved to Glenwood Elementary Six classrooms on the lower level will be used for regular education Seventh classroom on the main level will be used for Developmental Classroom Current resource room will be moved to a conference room Psychological testing/counseling and Speech Pathology will be housed in current PTO space

Transportation Plan TPS students will be transported to TPS on regular bus routes 3rd, 4th, and 5th grade students will be transported to Glenwood by bus arriving by 8:45 a.m. (approximately 10 minutes before Glenwood students) Buses will drive to rear of school and entry will be through rear door adjacent to pod area At dismissal, TPS students will board buses through same door approximately 15 minutes before Glenwood dismissal Transportation to Glenwood will be available for School Choice students

Afterschool Programs Glenwood afterschool program will have approximately 25 slots for TPS students

Provisions for TPS K-2 and 6-8 All students located in newer section of the building Bag lunches will be prepared in Sterling and brought to TPS Common areas in older section cleaned and reevaluated before re-occupancy