4 Atc Abatement Procedures - Decon Construction

8/18/2019 4 Atc Abatement Procedures - Decon Construction

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DecontaminationDecontamination

UnitsUnits


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DECONDECON

The worker/personal decontamination systemThe worker/personal decontamination system

(commonly called the "decon unit(commonly called the "decon unit” ” oror

“ “Decon") is specially designed to allowDecon") is specially designed to allow

passage to and from the work area duringpassage to and from the work area during

the abatement activities.the abatement activities.

The worker decontamination unit mustThe worker decontamination unit must

always be constructed and operational prioralways be constructed and operational prior

to the preparation of the work areato the preparation of the work area


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DECONDECON

The materials used to construct aThe materials used to construct aDecon unit vary from project to project.Decon unit vary from project to project.

2 x 4 wooden studs for the framework2 x 4 wooden studs for the framework

are commonly seen on abatement sitesare commonly seen on abatement sitesas well as aluminum, PVC piping, theas well as aluminum, PVC piping, the

walls of existing hallways, and manywalls of existing hallways, and many

other variationsother variations


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DECONDECON

If the Decon enclosures will beIf the Decon enclosures will beaccessible to the public, they shall beaccessible to the public, they shall be

fully framed and hardfully framed and hard--wall sheathed.wall sheathed.

Once the framework is in place, plasticOnce the framework is in place, plastic

(polyethylene) sheeting is required to(polyethylene) sheeting is required to

wrap the inside of the Decon. Thiswrap the inside of the Decon. Thisplastic sheeting is commonly referred toplastic sheeting is commonly referred to

asas “ “Poly.Poly.” ”


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Worker Decontamination UnitWorker Decontamination Unit

The Decon is to be wrapped with aThe Decon is to be wrapped with aminimum of two layers of 6minimum of two layers of 6--mil opaquemil opaque

poly. (NYCDEP)poly. (NYCDEP)

At least two layers of 6 At least two layers of 6--mil, firemil, fire--

retardant reinforced poly shall be usedretardant reinforced poly shall be used

for flooring protection (NYSDOL)for flooring protection (NYSDOL)


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NYC requires thatNYC requires that DeconDecon’ ’ ss located outdoorslocated outdoors

be waterproof and windproof be waterproof and windproof


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Inside Building (Soft Shell)Inside Building (Soft Shell)


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PERSONNELPERSONNELDECONTAMINATION UNITDECONTAMINATION UNIT

The typical worker Decon consists of threeThe typical worker Decon consists of threemain rooms:main rooms:

– – Clean RoomClean Room

– – ShowerShower – – Equipment room.Equipment room.

Each room is separated by curtain doorwaysEach room is separated by curtain doorways

and airlocks on each side of the showerand airlocks on each side of the shower

roomroom


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Decontamination UnitsDecontamination Units -- Plan ViewPlan View

Clean Room Shower Equipment

Room (Dirty

Room)

Storage

AreaWash Room

Air Flow

Air Flow

Work

Area

Waste Decon Unit

Orange denotes contaminated area

Airlock

3’ Airlock

3’

ain doorways

(Flaps)

Water

heater

Airlock

3’

Shower Water Filtration Unit


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Curtain DoorwaysCurtain Doorways


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CLEAN ROOMCLEAN ROOM

The clean room is the first room youThe clean room is the first room youencounter when entering the workerencounter when entering the worker

decontamination unit. No asbestosdecontamination unit. No asbestos--

contaminated items shall be found incontaminated items shall be found inthis room. Workers use this area tothis room. Workers use this area to

remove street clothing and jewelry, andremove street clothing and jewelry, and

also to don (put on) protective clothingalso to don (put on) protective clothing

and respirators.and respirators.


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SHOWER ROOMSHOWER ROOM

Workers pass through the shower room on theirWorkers pass through the shower room on theirway into the work area. On the way out of theway into the work area. On the way out of the

contaminated work area, the shower roomcontaminated work area, the shower room

becomes the most important room forbecomes the most important room fordecontamination. Once they have left thedecontamination. Once they have left the

equipment room and all contaminated clothingequipment room and all contaminated clothing

behind, the worker enters the shower area withbehind, the worker enters the shower area with

the respirator still on. It is here that the workerthe respirator still on. It is here that the worker

showers and the respirator are washed.showers and the respirator are washed.


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SHOWER ROOMSHOWER ROOM

The shower room must have 1The shower room must have 1shower per 6 workers (basedshower per 6 workers (basedon largest shift). Eachon largest shift). Eachshowerhead shall be suppliedshowerhead shall be supplied

with hot and cold waterwith hot and cold wateradjustable at the tap. Theadjustable at the tap. Theshower enclosure shall beshower enclosure shall beconstructed to ensure againstconstructed to ensure againstleakage of any kind.leakage of any kind.Uncontaminated (liquid) soap,Uncontaminated (liquid) soap,shampoo and towels shall beshampoo and towels shall beavailable at all times .available at all times .


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ShowerShower

All shower water must All shower water mustbe filtered beforebe filtered before

disposaldisposal

Filtered to a minimumFiltered to a minimum

of 5 micronsof 5 microns


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EQUIPMENT ROOMEQUIPMENT ROOM

This is a contaminated area whereThis is a contaminated area whereequipment, boots or shoes, hardhats,equipment, boots or shoes, hardhats,

goggles, etc. are stored. Upon exitinggoggles, etc. are stored. Upon exiting

the work area, this is where the workerthe work area, this is where the workerremoves the disposable suit and placesremoves the disposable suit and places

it in a properly labeled 6it in a properly labeled 6--milmil

polyethylene disposal bag (NYC) orpolyethylene disposal bag (NYC) or

lined container (NYS).lined container (NYS).


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Proper Entry ProceduresProper Entry Procedures

Enter Clean Room and remove all streetEnter Clean Room and remove all streetclothing and store all street clothing as perclothing and store all street clothing as perapplicable requirements.applicable requirements.

Put on Personal Protective EquipmentPut on Personal Protective Equipment(PPE), including protective clothing,(PPE), including protective clothing,respirator, gloves, etc. Proceed to therespirator, gloves, etc. Proceed to theEquipment Room and put on any applicableEquipment Room and put on any applicable

personal protective equipment, i.e. boots,personal protective equipment, i.e. boots,hardhats, etc. Collect any necessary toolshardhats, etc. Collect any necessary toolsthen proceed to work area.then proceed to work area.


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Proper Exit ProceduresProper Exit Procedures

Remove gross contamination from suit beforeRemove gross contamination from suit beforeleaving the work area. This can be accomplishedleaving the work area. This can be accomplishedby the use of a HEPA vacuum or wiping off theby the use of a HEPA vacuum or wiping off thesuit.suit.

Proceed to Equipment Room and remove allProceed to Equipment Room and remove allclothing and personal protective equipmentclothing and personal protective equipmentexcept the respiratorexcept the respirator. Place disposable clothing. Place disposable clothing

in the labeled waste bag (NYC) or containerin the labeled waste bag (NYC) or container(NYS).(NYS).

Store any other contaminated articles (tools) andStore any other contaminated articles (tools) and

proceed to the shower.proceed to the shower.


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Proper Exit ProceduresProper Exit Procedures

In the shower, with the respirator still on, wet theIn the shower, with the respirator still on, wet theface piece and filters [keep in mind, that once theface piece and filters [keep in mind, that once the

filters are wet they should be discarded sincefilters are wet they should be discarded since

breathing will be difficult through wet filters]. Oncebreathing will be difficult through wet filters]. Oncethoroughly soaked, remove the respirator and washthoroughly soaked, remove the respirator and wash

it with soap and water. Next, fully and vigorouslyit with soap and water. Next, fully and vigorously

shower and shampoo to remove residual asbestosshower and shampoo to remove residual asbestos

contamination. Proceed to Clean Room.contamination. Proceed to Clean Room.

Dry off and get dressed. Dry and store respirator.Dry off and get dressed. Dry and store respirator.

SignSign--out in the entry/exit log.out in the entry/exit log.

Documents

4 Atc Abatement Procedures - Decon Construction