A. The District may have conducted previous hazardous materials abatement projects at the site. The hazardous materials abatement oversight information is available for review by appointment only through the District’s Asbestos Control Program at (415) 241-6226. B. Copies of previous hazardous materials report(s) and the AHERA Management Plan for the site are available for review by appointment only through the District’s Asbestos Control Program at (415) 241-6226. C. Asbestos Hazards at Burton High School (Information is limited to Exterior Site and Building B) 1. Asbestos has been identified at concentrations greater than one percent (>1%) in the following materials: a. Exterior Site: 1) Pipe insulation (5% Chrysotile asbestos, 20% Amosite asbestos) at pipe elbows and tees at below grade tunnel leading from Building B (Classroom Building) to Buildings D (Cafeteria Building) and Building E (Gymnasium Building). 2) Cementitious tar coating (black) (2% Chrysotile asbestos) located below green and red coatings at asphalt at the north, west and east sides of Building E and the tennis courts. 3) Caulkings located at metal flashing / expansion joints at the Covered Walkway Roofs located at the north elevation of Building C b. Building B (Classroom Building): 1) Exteriors: a) Caulking (gray / brown) (5% Chrysotile asbestos) at metal louvered vent framing and concrete rough openings. b) Caulking (gray / brown) (5% Chrysotile asbestos) at metal door framing and concrete rough openings. c) Caulking (gray / brown) (5% Chrysotile asbestos) at metal window framing, window wall framing and concrete rough openings. d) Exterior window glazing compounds (gray and white) (2% Chrysotile asbestos). e) Tar / caulking (black) (10% Chrysotile asbestos) at exterior wall transitions between WA01 Walk A, WB01 Walk B and Buildings A and B and WC01 Walk C and Buildings B and C. 2) Interiors: a) Acoustic ceiling plaster (3-5% Chrysotile asbestos) at ALL Floors at Stairs BST01, BST02, BST03 and BST04 and the Second Floor at Corridors B2CSE and B2CW. b) Pipe insulation (5-10% Chrysotile asbestos, 20% Amosite asbestos) at pipe elbows and tees at the following locations: • Basement Floor at the B001 Boiler Room, Boiler Pit, Receiving Area B006, Storage B008, B009 and B010; • Classrooms at wall mounted radiators ; and • Throughout at ceiling plenums and wall cavities. c) Hot water tank insulation (15% Chryostile asbestos, 3-15% Amosite asbestos) at the hot water tanks at the Basement Floor at the B001 Boiler Room / Boiler Pit. d) Taping compound (2% Chrysotile asbestos) on gypsum board walls at the following locations: • First Floor at Quiet Time B106 and Offices B106.1 and B106.2; and • Third Floor at Classroom B328 and Office B328.4.
