CONFINED SPACE LOCATIONS LISTS. Ventilation, atmospheric monitoring, pump down. Safety eyewear Hardhat Chemical resistant gloves Disposable coveralls

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1 Campus Sewer manholes Hazardous atmospheres: sewer gas (hydrogen sulfide), oxygen deficiency, presence of explosive/flammable gases, biological, and Electrical manholes/vaults Telephone manholes Hazardous energy, oxygen deficiency, Hazardous energy, oxygen deficiency, monitoring, pump down monitoring, isolation lockout/tagout and pump down monitoring, isolation lockout/tagout and pump Chemical resistant gloves down Elevator pits Hazardous energy Isolation lockout/tagout Steam tunnels/vaults (as outlined on the attached drawing) Steam tunnels Sills Hall to Hatch Science Library Hazardous atmospheres, oxygen deficiency, entry/egress complications, restrictive work environment, uneven walking surfaces, extreme temperature, burns (steam), (vaults), lighting, noise, communication difficulties, pests Extreme temperature Ventilation to cool the space, if steam is present and for hazardous atmospheres or oxygen deficiency, atmospheric monitoring, pump down if vault contains water Ventilation to cool the space None Equipment and personal decontamination is required upon exit. None Infrequent entry None Infrequent entry None Reclassified Entry Contracted out. Bowdoin employees typically do not enter elevator pits Interior lock or bar, tab welds Locked door and Alternate Entry (specific procedures outlined the CSE Program) training under normal conditions. Steam in tunnel from Sept- June. Entry while steam is charged occurs one-time per year during start up to open steam valves. However, entry may occur for emergency repairs/operating the irrigation system. Drawings of the steam tunnels, vaults, and access points are attached to this list. See steam tunnel specific entry procedures in Section: Bowdoin College Page 1 of 7 Revision

2 Interstitial Space College Street adjacent to H&L Library and Bath Road adjacent to Adams Hall Window wells Large dewatering pits with pumps for foundation/storm drains: (Interior, mechanical spaces): Chamberlain Hall (2), H&L Library (2) Kanbar (2), 216 Maine Street, Peter Buck Fitness (2) Searles Science Center Stowe Hall (2) Thorne Hall, Walker Art (2), Wish Theater, Exterior: Kanbar (near Cleaveland Hall), Moulton Union (loading dock), Walker Art (quad east) Campus-wide: ceiling plenum Water meter pits None under normal conditions Oxygen deficiency, Restrictive work environment Oxygen deficiency, N/A, isolation, lockout/tagout, pump down, isolation, lockout/tagout, pump down Safety glasses hard hat leather work gloves Steel grates training under normal conditions. Bowdoin College Page 2 of 7 Revision Window wells > than 4 feet in depth and open-topped space. Entry required for seasonal cleaning of debris. None Consists of quarterly maintenance (check grease) and annual servicing by contractor. Pump is pulled from exterior and entry is not required or anticipated. Cannot isolate valve from exterior training None 6-8 inch water lines. Pit owned by Bowdoin College and equipment owned by the Town of Brunswick. The Town of Brunswick is the primary entrant. Cannot isolate valve from exterior

3 Chapel/Bannister Hall Crawlspace under alter Oxygen deficiency, potential for hazardous energy Coastal Studies Center North tower vent stack Intermediate marine lab wet well Potential for hazardous atmospheres (hydrogen sulfide, explosive/ flammable gases, and oxygen deficiency), isolation, lockout/tagout Safety glasses Safety glasses Engulfment Isolation None Unaware of entry to date. Space must be evaluated and treated as PRCS until further assessment. None Unaware of entry to date. Space must be evaluated and treated as PRCS until further assessment. Locked hatch Reclassified Entry Conducted weekly during pigging operations. Standard Operating Procedures required to reclassify Farley Field House/Greason Pool Solar lab pump crawlspace Pool, if dewatered during maintenance Pool pit, south side of pool deck Potential for hazardous atmospheres None under normal conditions Hazardous atmospheres: (chlorine vapors and carbon monoxide, oxygen deficiency), and Isolate, pump down, engineered procedures Isolate and pump down, ventilation, atmospheric monitoring including chlorine gas. Disposable work gloves Air purifying respirator with chlorine cartridges None Mechanical Services inspects 4 times/year. Alternate Entry may be possible once atmospheric monitoring indicating otherwise Procedures training Entry has not been required to date. Should it be required that the pool is emptied for maintenance/repairs, engineered dewatering procedures will be followed. Bolted Infrequent entry (not entered in ~14 years). Bowdoin College Page 3 of 7 Revision

4 Heating Plant the hazard analysis) 3,4 Filter tanks Hazardous atmospheres: chlorine vapors and oxygen deficiency monitoring including chlorine gas Filter room: discharge pit Hazardous atmospheres Gravity overflow drain to pond by women s soccer field Crawlspace, west pump room Hazardous atmospheres: chlorine vapors, oxygen deficiency, and Temperature/steam/hot water (when steam is present), entrapment, low lighting, uneven walking surfaces, oxygen deficiency Isolate and pump down, including chlorine gas, illumination Air purifying respirator with chlorine cartridges Chemical resistant gloves Chemical resistant gloves Bolted Alternate Entry Tank cleaning occurs onetime per year (June) over two days, but entry into the space does not occur. A shovel is extended into the open for removal of the top layers of sand. None Alternate Entry Infrequent entry 1 time/year for approximately 15 minutes to clean plastic filter. Approximately ½ inch of standing water at base of pit. Hatch and room door, adjacent to pit is opened for ventilation. Procedures to ventilate space prior to entry will continue to be followed. None West side of the pool (baseball field side) ~30 deep, overflow for groundwater and leaks at base of pool. None Infrequent entry. Contains conduit, wire, and plumbing equipment. Heat/steam/hot water is a hazard when the Heating Plant is in operation. Concrete slab encapsulates sand contaminated with asbestos fibers. Bowdoin College Page 4 of 7 Revision

5 Moulton Union Rhodes Hall Hot well Boilers: Fire box, wind box, steam drum, mud drum DA Tank/Heater Boilers - breaching Crawlspaces under kitchen and dishwasher Crawlspace under southwest stairs houses hot water heater, and septic pump Temperature, oxygen deficiency Temperature, hazardous energy, oxygen deficiency Temperature, hazardous energy, oxygen deficiency, Temperature, oxygen deficiency, configuration Temperature (steam), oxygen deficiency Hazardous energy, configuration Controlled access while Heating Plant is in operation, ventilation and Ventilation, isolate, lockout/tagout electricity to prevent automatic damper operation, atmospheric monitoring Ventilation, isolation, lockout/tagout, boiler shut down, atmospheric monitoring monitoring, isolation, boiler shut down Schedule work when steam is absent, Atmospheric monitoring Isolation, lockout/tagout Bolted cover Not possible to accessed when Heating Plant is in operation. Alternate Entry may be possible once Within equipment Within equipment Within equipment None Locked door on main egressway. Window near stairs is used to gain access. (when steam is present) Alternate Entry (when steam is absent) indicates otherwise. Infrequent entry Entry mostly occurs in the summer when steam is absent. Infrequent entry Crawlspace under kitchen is accessed by bulkhead mostly by contractor Mechanical Services may enter to repair condensate pump. Full-sized door at entry where electrical panels and telephone equipment are housed. Beneath stairs, configuration of piping and access point impedes egress. Open electrical box. Bowdoin College Page 5 of 7 Revision

6 the hazard analysis) 3,4 Visual Arts Center Sewer ejection pump pits Hazardous energy, hazardous atmospheres: sewer gas (hydrogen sulfide), oxygen deficiency, explosive/flammable gases, biological, and Watson Arena Cooling towers Hazardous atmospheres: ammonia (NH3) vapors Ice/snow melt pump manhole Hazardous atmospheres,, hazardous energy Isolation lockout/tagout,, including NH3 gas., isolation lockout/tagout, and pump down Zamboni dump tank Slipping hazard Melt ice/snow prior to entry, use of appropriate extension ladder to access Irrigation pit in Grey Building Potential for oxygen deficiency and hazardous atmospheres Nitrile, chemical resistant gloves Air purifying respirator with NH3 vapor cartridges Chemical resistant gloves None Infrequent entry. Equipment and personal decontamination is required upon exit. Contractor removes pump to service. Locked doors Alternate Entry Entrance ~2x/year Heavy maintenance/cleaning contracted out. None Reclassified Entry Entry for maintenance of pump and pump systems(remove cover for passive ventilation and conduct air monitoring) Appropriate footwear None training Locked doors training and pre-entry and continuous atmospheric testing Use of ladder to access the base of the tank This space is accessed during start-up and shutdown and for maintenance. Atmospheric testing will be conducted prior and during entry 1. Additional hazards may be introduced into the space and alter the control measure and PPE requirements. If work operations such as welding, cutting, or use of chemicals is required within a confined space, the conditions of the space will change and should be evaluated with EHS prior to entry. 2. Atmospheric monitoring always includes oxygen content, carbon monoxide, and flammable gasses or vapors, and other toxic air contaminants as deemed necessary based on the pre-entry assessment. 3. Although PPE options are outlined in the table, it is not all inclusive, and PPE will vary depending on the tasks and exposure risks. A full-body harness will be worn by employees entering confined spaces unless waived by the Office of EHS. Appropriate respiratory protection will be selected based on historic and direct read air monitoring results. Appropriate PPE will be considered and outlined in Section B (Pre-Entry Plan) of the Confined Space Permit located in Appendix D prior to entry. 4. Permit confined space entry will include retrieval system (full-body harness, tripod, ropes) and a hardhat unless deemed by the Associate Director of EHS to create additional hazards. 5. Manholes owned by utility companies are not secured or posted by the College. Bowdoin College Page 6 of 7 Revision

7 Confined Spaces (Exempt Permit-Required Confined Spaces) For all HVAC systems Electrical and mechanical lockout/tagout with prior notice to Security for alarms. Atmospheric monitoring is NOT required for routine entry of HVAC units, when accessed through a standard door, unless the hazard assessment indicates a potential atmospheric hazard. All other non-permit confined space entry requirements will apply. Building Druckenmiller Hall Kanbar H&L Library Burton-Little House Chamberlain Hall Coffin Street Dormitories Farley Fieldhouse Morrell Gymnasium Pickard Theater Coles Tower Edwards Art Center Thorne Hall Stowe/Howard Halls Searles Hall Hubbard Hall Hatch Library Gibson Hall Sills Hall Watson Arena Location / Unit Penthouse; AHU-1,2,3,4, EAHU 1 & 2 (annual servicing of HVAC units EAHU 1 & 2 is conducted under procedures that would eliminate a potential atmospheric hazard.) Basement, AC-1 Roof, AC-2 Penthouse; AHU-1,2,3,4 Basement, AC-5 Basement, AHU-1 Basement, AHU-1 East Roof, ERU-1 West Roof, ERU-2 Fan Room; HV-3,4 Penthouse; HV-1,2,3,4,5 Roof; HV-6,7 Attic, AHU-1 Basement, AHU-2 Basement; HV-1,2 Penthouse, HV-3 AHU-1 Basement; AHU-1 Roof, AHU-3 Connector, AHU-5 Basement, HV-1 Attic, HV-2 Attic; HV-1,2 Basement; HV-1,2 AC access over stacks stairway Roof, AC-1 Basement; HV-1,2 Auditorium, HV-1 Basement, HV-2 DAHU1, EAHU 1,2,3, MAU1 Bowdoin College Page 7 of 7 Revision