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DECONTAMINATION. REGULATION OSHA 1910.120(q) Employer shall develop plans Operations level = basic implementation Technician = understand and implement.

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Presentation on theme: "DECONTAMINATION. REGULATION OSHA 1910.120(q) Employer shall develop plans Operations level = basic implementation Technician = understand and implement."— Presentation transcript:

1 DECONTAMINATION

2 REGULATION OSHA (q) Employer shall develop plans Operations level = basic implementation Technician = understand and implement Specialist = determine and implement IC = understand importance

3 DEFINITION The process of removing or neutralizing contaminants that have accumulated on personnel, property, and equipment

4 DECONTAMINATION PLAN Development Part of scene safety plan Person responsible

5 DECONTAMINATION PLANREASONS Number and layout of decon stations Equipment needs Appropriate decon methods Preventing contamination of clean areas Contaminant contact minimized Disposal of clothing and equipment

6 TRAIN ALL PERSONNEL ON THE PLAN DECONTAMINATION PLAN FLEXIBILITY REVISE THE PLAN WHENEVER: Level of PPE changes Ambient or other conditions change Hazards are reassessed

7 SAFE WORK PRACTICES DO NOT (if possible): CONTAMINATION PREVENTION Walk, sit, or stand, get splashed by, or come in contact with airborne or liquid materials Use contaminated equipment and instruments

8 DO: Use disposable garments and equipment when possible Cover equipment and tools when possible Use proper donning and doffing procedures Use remote sampling and handling equipment Encase the source of contamination with plastic sheeting or overpacks CONTAMINATION PREVENTION

9 PPE INSPECTION Ensure there are no cuts or punctures Close all flaps, zippers, buttons, and ties Tape openings of gloves, boots, and jackets Dress prior to entering work zone CONTAMINATION PREVENTION

10 CONTAMINATION LOCATION Surface only or permeated into PPE Sometimes easy to detect and remove on the surface Permeated material may be difficult or impossible to detect and remove Without removal, permeation continues until breakthrough occurs

11 FIVE MAJOR FACTORS OF PERMEATION Contact time Chemical concentration Temperature –Ambient –Chemical Size of chemical molecules and pore space of PPE material Physical state (solid, liquid, or gas)

12 THREE DECON METHODS 1. Physical removal –Dislodging / displacing –Washing / rinsing –Wiping / brushing –Evaporation –High pressure (air or water) –Disposal –Vacuum (dry decon)

13 THREE DECON METHODS 2. Chemical removal –Done only if recommended by a chemist, industrial hygienist, or qualified professional 3. Inactivation (rendering inert) –Chemical detoxification –Disinfection –Sterilization

14 EPA RECOMMENDS ONLY SOAP AND WATER FOR ALL WET DECON CLEANING SOLUTIONS Before using any other solution, contact the chemical manufacturer and check chemical compatibility and suit material compatibility

15 EXAMPLES OF CLEANING CHEMICALS

16 Visual observation –Natural light –Discoloration or stains –Material degradation and breakdown Ultraviolet light –Some hydrocarbons become visible Colorimetric tube –Individual chemical testing TESTING DECON EFFECTIVENESS

17 Wipe sampling –Natural light –Dry or wet cloth swab; send to lab –Sample inner and outer surfaces Cleaning solution analysis –Sample final rinse –pH of final rinse Permeation testing –Send sample pieces of suit to lab TESTING DECON EFFECTIVENESS

18 HEALTH AND SAFETY HAZARDS Compatibility of decon solution with PPE and hazardous substances Possible health hazard to workers Effective decon methods Decon line established before anyone enters the Hot Zone

19 DECON DESIGN Located in the Contamination Reduction Zone (CRZ) between the Hot and Cold Zones The level and type of decon are dependent on the material(s) found Should include emergency contingencies

20 Redress CRC Support Staff Tank change Clean Side Dirty Side Auxiliary access control path Equipment Decontamination Emergency Decon Cold Line Cold Zone Hot Zone Hot Line Enter Path Exit Path Warm Zone CRZ Wind Wash and Rinse CONTAMINATION REDUCTION ZONE

21 Recommended heavy equipment DECON CONTAMINATION REDUCTION ZONE

22 DECON PROCEDURES Place chemically impervious ground cover in decon area Follow a series of specific tasks Perform work at several separate stations to prevent cross contamination Perform work in order of decreasing contamination (dirty to clean)

23 DECON PROCEDURES Set up in a straight line when possible Size depends on: –Number of work stations –Scene layout and topography –Usually 75' x 15' is adequate

24 Overall DECON

25 Entering the DECON corridor

26 Personnel DECON

27 Emergency Shower

28 Suit and boot wash Suit and boot rinse Safety boot removal FES removal CBA backpack removal Inner glove wash Inner glove rinse Face piece removal Inner glove removal Inner clothing removal Tank change 5 1 Outer glove removal Boot cover removal Tape removal Boot cover and glove wash Segregated equipment drop 432 COLD LINE BC and G rinse HOT LINE Field wash Redress Decon Layout Level A Protection Contamination Reduction or Warm Zone Support or Cold Zone Exclusion/ Hot Zone Contamination Reduction Corridor 19-STEP DECON LINE

29 Equipment Drop B drop all equipment except the information that goes to the Command Center

30 Gross wash and rinse done by the Entry Team personnel with assistance from DECON personnel

31 DECON personnel conduct the second wash and rinse

32 Final rinse

33 Decision: Change-out tank or remove suit?

34 Tank change-out done by the “rinser”

35 Removal of the chemical suit

36 SCBA Removal

37 Field wash and rinse, or shower, or DECON trailer

38 DECON shower with privacy curtain

39 Shower B PVC pipe and a 200-gal. catch basin

40 Shower and final rinse

41 Shower for cooling personnel

42 DECON trailer

43 Stools for members of the Entry Team remaining in their suits B medical monitoring and debriefing

44 Medical monitoring and debriefing for out-of-suit personnel

45 Air-inflatable tent used for medical monitoring and debriefing

46 DECON line diagrammed onto a clear polyethylene sheet

47 Wind direction Decon solution Water Equipment drop Exclusion zone Plastic sheet Can (10 gallon) Can (32 gallon) Decon outer garments Remove boot covers and outer gloves Tank changeover point Contamination Reduction Zone Remove SCBA 201 Hot Line Support Zone Remove boots/gloves and outer garments (For disposal and offsite decontamination) F.S.O.P. No. 7 MINIMUM A AND B DECON

48 Segregated equipment drop 1 COLD LINE HOT LINE Decon Layout Level A and B Protection Contamination Reduction or Warm Zone Support or Cold Zone Exclusion or Hot Zone 3 Tank change Contamination Reduction Corridor EPA's 7-STEP DECON LINE Outer boot, glove, FES wash and rinse Outer boot and glove removal Boot, glove, and FES removal SCBA removal Field wash

49 7-step Decontamination Line

50 Station # 1 - Gross Wash and Rinse AA. Vacuum BB. Extra pads A. Equipment drop B. Bucket with brush C. Plastic pool D. Bucket for trash E. Wash solution F. Stool G. Shower (if used) H. Drums for spent solution Station # 2 - Second Wash and Rinse B. Bucket with brush C. Plastic pool E. Wash solution H. Drums for spent solution I. Garden hose with spray wand J. Stabilizing device Station # 3 - Final Rinse C. Plastic pool G. Shower (if used) H. Drums for spent solution I. Garden hose with spray wand J. Stabilizing device Station # 4 - Tank Change / Cartridge F. Stools K. Cylinders L. Supply of outer gloves M. Outer boot covers Station # 5 - Equipment Removal D. Trash can F. Stools H. Drums for trash N. Trash bags O. Table P. Bucket of soap and water Q. Bucket of water Station # 6 - Field Wash or Shower D. Trash can G. Shower ( if used ) O. Table P. Bucket of soap and water Q. Bucket of water R. Supply of inner suits Station # 7 - Medical Monitoring / Debriefing F. Stools O. Table S. Blood pressure cuff and thermometer DECON COMPLETE LAYOUT

51 PERSONAL PROTECTION Decon workers can set up the decontamination reduction corridor in level D protection Once the warm zone has been activated, the minimum level of protection is one level less or the same as the entry team's The first position in decon may require a greater level than the rest

52 DISPOSAL METHODS All equipment used must be disposed of or decontaminated properly All spent solutions must be collected and disposed of properly Clothing and solid materials must be placed in plastic bags pending further testing, decon, and/or disposal according to local, state, or federal standards

53 DECON workers must clean up their area, restock, then DECON themselves

54 Basic emergency DECON set-ups

55 EMERGENCY DECONTAMINATION The primary concern is for response personnel, then the public –Prevent loss of life –Prevent severe injury Plan for medical emergencies –Decon victim(s) –Protect medical personnel

56 Decision to decon victim is based on: Type and severity of contamination or injury Immediate life-saving and first aid needs Aggravation of the injury or delay of life- saving treatment EMERGENCY DECONTAMINATION

57 Alert medical personnel of potential contamination; protect medic unit Send chemical information with the victim Send response personnel familiar with the incident with victim if possible EMERGENCY DECONTAMINATION

58 Dispose of contaminated PPE

59 Wash, rinse, and/or cut off PPE or clothing


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