of some frequently used terms relating to Environmental Restoration.
Authorized Visitor(s): Owner's Designee
or person(s) representing regulatory agencies, and person(s) authorized by them.
Cleaning and Disinfection Work
Area(s): Area(s) where work takes place which will, or may, disturb microbial
growth, including fungus and moulds, or settled dust(s) that may contain spores.
Controlled Wet Abrasive Blasting:
Method to remove top layer of base structural elements (wood beams and joists) to remove
filamentous hyphae (root like structures) without compromising structural integrity.
"Torbo Blaster" is
Curtained Doorway: Device to allow ingress
or egress from 1 room to another while permitting minimal air movement between rooms,
typically constructed by placing 2 overlapping sheets of polyehtylene sheeting (2 sheets
of polyethylene per flap) attached to head and 1 jamb of existing or temporarily
constructed door frame. Secure vertical edge of 1 flap along 1 vertical side of door frame
and vertical edge of other flap along opposite vertical side of door fram. Reinforce free
edges of polyethylene with duct tape.
Disinfectant: 5% solution, by volume of Bleach (Sodium
DOP Test: A testing method employing dioctyl
phthalate aerosol for purpose of leak-testing negative air units.
Flexible Ducting: Metal reinforced flexible
ductwork, 300 mm (12") diameter minimum.
Fungicide: 5% solution or manufacturers recommended
Ground Fault Panel: Portable electrical panel
equipped with ground fault circuit interrupters (5 Ma protection) of sufficient capacity
to power all electrical equipment and lights in asbestos work enclosure. Panel complete
with ground fault interrupter lights, test switch to ensure unit is working, and reset
switch. Installed by licensed electrician.
HEPA Filter: High Efficiency Particulate Aerosol
filter at least 99.97 percent efficient in collecting 0.3 micrometer aerosol.
HEPA Vacuum: Vacuum with all necessary fittings, tools
and attachments. Air must pass HEPA Filter before discharge.
Negative Air Unit: Portable air handling
system which extracts air directly from asbestos work area and discharges air outside
building. Unit shall be fitted with prefilter and HEPA final filter. Air shall pass HEPA
filter before discharge. Unit shall have pressure differential guage to monitor filter
loading. Unit shall have auto shut-off and warning system for HEPA filter failure. HEPA
filter shall have separate hold down clamps to retain filter in place.
Negative Pressure: Reduced pressure within
work area(s) established by extracting air directly from the work area, and discharging it
directly to exterior of building. Discharged air first passes through HEPA filter. Extract
sufficient air to ensure constant reduced pressure at perimeter of work area with respect
to surrounding areas.
Polyehylene: 0.15 mm(6 mil) minimum thickness
unless otherwise specified; in sheet size to minimize joints.
Polyethylene Sheeting: Polyethylene
sheeting of 0.15 mm (6 mil) minumum thickness with tape seals along edges, around
penetrating objects, over cuts and tears, and elsewhere as required to provide continuous
polyethylene membrane protection.
Protective Coveralls: Disposable full
body coveralls complete with elastized hoods made of spun polyefin material
"Tyvek" by Dupont or nonwoven material Kleenguard by Kimberly Clark (or
Rip-Proof Polyethylene: 0.20 mm (8 mil) fabric
made up from 0.13 mm (5 mil) weave and 2 layers 0.04 mm (1.5 mil) poly laminate, in sheet
size to minimize joints.
Sealer: Sealer for purpose of trapping residual microbe
spores. Product must have flame spread and smoke development ratings both less than 25.
Product shall leave no stain when dry: TC-55 (clear), A/D Fire Protection Systems Inc.,
Scarborough, Ontario (or equivalent).
Sprayer: Garden type, portable manual sprayer, low
velocity, capable of producing fine spray.
Tape: Tape suitable for sealing polyethylene to surface
encountered, under both wet conditions using amended water, and dry conditions.
Waste Receptors: Two separate containers of which 1
shall consist of 0.15 mm (6 mil) minimum thickness sealable clear polyethylene bag. Other
container may be 0.15 (6 mil) minimum thickness clear polyethylene bag or rigid sealable
container such as cardboard or fibre drum or wood box. Other container shall be adequate
to prevent perforating rips,. tears during filling, transport or disposal. Containers must
be acceptable to disposal site selected, and Ministry of Environment and Energy.