SPLOPS COMBINED Flashcards

(243 cards)

0
Q

Can ABC kits be used for other chemicals than chlorine?

A

yes.

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1
Q

Pneumatic plugs for drums range in size from ?

A

4 inches to 3 feet.

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2
Q

what are the general confinement techniques for a solid?

A

Site control.

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3
Q

What are offensive operations decisions that need to be made?

A
what stresses caused the breech?
Identity of the product
Defensive actions already taken
Offensive ops risk vs. benifit
what hazards result in taking offensive ops
Can offensive ops work
Can offensive ops be done safely 
Can offensive ops mitigate the situation.
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4
Q

what are the most basic control measures for tank cars?

A

if open- close it - clockwise
if loose- tighten it- clockwise
if missing- replace it

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5
Q

What are the considerations for overpacking a container?

A

Must be 85 gallons
Compatible with material or chemical hazard
must write chemical name on container
must write salvage drum on container
must be able to withstand pressure and not over pressurize container

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6
Q

If a relief valve on a non-cyrogenic tank is operating what should you do?

A

find out the reason it is operating, if the product is causing a hazard then defensive measures should be taken.

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7
Q

Are leaks from pressure relief valves considered a breach?

A

NO.

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8
Q

What should be done first before overpacking a drum?

A

stop the leak first.

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9
Q

how much does a nearly full 35 gal drum weigh?

A

approx 600lbs

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10
Q

What are the terms when discussing damage to a container?

A
Cracks- narrow splits or breaks
scores- indentation
gouges-removal of container material
dents- deformities
burns
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11
Q

What must be done to any container before attempting to control a leak?

A

stabilize the container.

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12
Q

What are mitigation methods for 55 gal drums?

A

Overpacking
bandages
plugging/ patching
sealants

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13
Q

Flaring is used when?

A

disposal of flammable materials

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14
Q

What is the advantage of a vacuum truck

A

does not have to develop a higher pressure than the damaged container.

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15
Q

AFFF foam for non-polar substances like gasoline/ oils work by?

A

reduces surface are and decreases heat production

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16
Q

Define containment?

A

KEEP IN CONTAINER

actions taken to keep material in “container”

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17
Q

Best methods for practicing on pressure vessels?

A

First practice without protective clothing
second add gloves
Third, use all together.

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18
Q

Cargo tank mitigation includes what?

A

replacing bolts, gaskets or caps.

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19
Q

what are the general confinement techniques for a liquid?

A
absorption/ adsorption
damming/diking
diversion
dispersion
retention.
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20
Q

What are the general techniques for containment?

A
Auxiliary closure devices
bandages
neutralization
overpacking
patching
plugging
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21
Q

What is the anatomy of a drum?

A

circular opening at the top- BUNG
First rim at the top- CHIME
rims or rings below the 1st- ROLL RINGS

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22
Q

What are considered auxiliary tools?

A

bung wrenches
non- sparking tools
drum leveler/ up righting
dolly/ carts

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23
Q

What are the general control techniques for a gas or vapor?

A

Suppression
dispersion
confinement.

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24
What type of call makes up most Hazardous materials calls?
Non- bulk container.
25
when and why do hazardous materials releases occur?
``` improperly secured valves bad gaskets overfilling unsecured fittings venting from relief valves ```
26
Venting is used for what material?
non-flammable gases
27
What are considered general hazards?
``` physical environmental container hazards container stability Container integrity Energy releases. ```
28
Cargo control tank mitigation from piping or valves should be?
closing valves upstream of the leak.
29
What is the pressure in the piping generally for a cargo tank?
75 psi
30
Cargo tank removal methods include?
flaring transferring venting venting/burning
31
define confinement
actions to keep material in an area?
32
Regardless of flammability hazards, what should be controlled?
All ignition sources.
33
What are auxiliary control devices or measures?
Dome clamps engineered shut off valves A B C chlorine kits sealants
34
what should be done if unsure of a container's status?
take defensive measures and get expert help.
35
definition of sublimation
the ability of a solid to change state directly to a gas.
36
defintion of temperature
measure of heat energy.
37
Cyrogenics are defined at what temperature?
Boiling point - 130 degrees F
38
Definition of flash point?
minimum temp of a LIQUID can ignite a flash in the vapor space of the liquid.
39
NFPA definition of Flammable liquid? | NFPA definition of combustable liquid?
liquids have flash points less than 100 degrees F | liquids have flash points between 100 and 200 degrees F
40
Definition of viscosity?
ability of a liquid to be poured.
41
What does OC and CC mean with relation to flammable liquids?
open cup and closed cup testing.
42
By doubling the distance in regards to radioactivity what happens?
the energy is decreased by 1/4.
43
Expansion ratio of LPG- liquified petroleum gas?
250:1
44
1% equals how many PPM?
10,000.
45
Definition of LEL and UEL?
concentration of vapor from a liquid | or flammable gas in air.
46
what are the common units of measurement for pressure?
760 mmhg 760 torr 1 atm 14.7psi
47
definition of vapor pressure
ability of material to evaporate.
48
Definition of specific gravity?
the weight of a material with reference to water wether it will sink or float. Water being 1.0.
49
Which "TYPE" of organic peroxides are the most unstable and forbidden in transport?
Type A and are usually dissolved in a solvent to prevent the chemical reaction.
50
DOT definition of flammable liquid?
liquid have a flash point less than 140 degrees F.
51
Definition of corrosivity?
solid, liquid, or gas that burns, irritates, or destructively attacks organic tissues. Either acids or bases.
52
What is the flash point of gasoline?
-45 degrees F
53
Emmited energy as a result of a change in the nucleus or its atoms is called?
Radioactivity.
54
Radiation is measured in what units?
RAD- radiation absorbed dose
55
Definition of solubility?
ability of a substance to mix completely with another substance.
56
oxidizers and corrosives make what class of chemical?
inorganic perioxides
57
the lower the flash point the ________ flammability of the liquid.
"Higher"
58
Organic peroxides are composed of what?
an oxidizer and compound that contains a fuel.
59
Definition of "ignition temperature or Auto ignition temperature"?
Temperature at which a materials vapors start to burn without flame or other ignition source.
60
Acidity is based on what factor?
amount of H ions in solution.
61
Definition of contamination?
when a radioactive material becomes attached to something.
62
DOT definition of compressed gas?
pressure of 40psi at 70 degrees F.
63
what are non-polar substances?
gasolines, oils, petroleum based products.
64
Expansion ratio for LNG- liquid natural gas?
600:1
65
what is vapor density?
the ability of the vapor to rise or sink when compared to air
66
Pyrophoric solids ignite at what temperature?
at or below 130 degrees F
67
Properties of Beta particles
travel distance of approx 30ft. moderate size particle moderate energy emited.
68
Definition of Solvent?
material in GREATER concentration in a mixture
69
OSHA radiation exposure limits are ?
3 rem/ quarter or 5 rem/ year.
70
Home propane tank pressures are regulated at?
working pressure of 240psi pressure relief @ 375psi testing pressure @ 480psi.
71
Properties of alpha particles
shortest traveling distance at about 4" largest of radioactive particles lowest energy emmited.
72
what percentage of space must remain in the container of a compressed gas?
15%
73
Properties of Neutrons
Travels the furthest and requires significant shielding size is larger than beta but 1/4 the size of alpha. found generally with atomic weapons.
74
the amount of time it takes for half the atoms in a sample to decay is what?
half- life.
75
Radioactive particles cause damage by 2 ways:
disrupting cell division | forming H202 chemicals in the body.
76
Definition of solute?
material in LESSER concentration in a mixture.
77
How is vapor density measured (2 ways)?
in relation to air being 1 and MW of air being 29.
78
Difference between gamma and x-rays origination?
Gamma originate in the nucleus and x-rays outside the the nucleus.
79
Explosion proof labels mean?
reactions are contained within enclosures.
80
What is gas chromatography mode?
the sample can be identified by seperating it into GC columns and the chemicals retention time.
81
Gamma radiation is measured in what?
mR/hr or uR/hr - roentgens.
82
What are the basic rules for detection devices? (7)
1. prioritize monitoring- measure 02 levels first. 2. select to appropriate instrument 3. absence of evidence is evidence of absence. 4. never assume only 1 hazard is present. 5. use one instrument to confirm another 6. interpret readings in more than 1 way 7. establish action levels.- (unknowns have a 25% LEL.)
83
What gas is required for proper functioning of a CGI since it requires combustion of the vapor or gas its detecting?
Oxygen
84
Primary disadvantage of a dosimeter is?
gives measurements of radiation that ALREADY has been received.
85
Although detector tubes are calibrated to 1 material it may respond how?
to other materials that have similar structure and reactivity.
86
Monitoring equipment helps you determine what 3 things?
appropriate PPE safe areas and evacuation zones control tactics
87
PID's determine what?
if there are high or low concentrations of s chemical present.
88
The aspiration pump for detector tubes must be calibrated how often?
on a quarterly basis.
89
what gas or vapor must be present in order for the FID to work?
oxygen.
90
What are the simplest kits in order to test for hazards?
Test papers and or kits.
91
Definition of accuracy?
average of all measurements fall within an acceptable predetermined interval from the true value.
92
Most detection read-out is done ?
in real time
93
Definition of ionization potential?
the energy required to move the OUTTER MOST electron from the atom or nucleus.
94
UL and FL markings mean what?
intrinsically safe for class 1 division 1 groups ABCD.
95
Definition of precision?
grouping of separate readings around a calculated average.
96
what is the most important initial check on an instrument?
the battery check
97
How should detector tubes be stored?
left in the their original box.
98
In order to use the FID's GCs function what has to be known?
A general idea what gases or vapors may be present.
99
What is the sampling procedure while using a sample line?
1 to 2 seconds per ft of hose.
100
alpha and beta radiation is read in what?
CPM- counts per minute
101
Another name for radiation survey instruments commonly found in fire departments today is called what?
Ludlam meter.
102
PID's readouts in regards to IP are in what measure?
PPM.
103
What is relative response?
when an instrument reading is higher or lower than the actual concentration of vapors or gases present.
104
CGI's with IR capability can read what?
CO2 and CH3 levels in concentrations above 5,000PPM.
105
what are the three different scales for a CGI?
PPM % LEL % gas
106
FID's measure reading are in what?
PPM
107
An appropriately set CGI low level alarm is set at what percent of the cal gas?
10%
108
PID readings of 5 PPM or more of an unknown gas or vapor mean what?
Indicate need for protective clothing and breathing apparatus.
109
How is ionization potential (IP) expressed?
Electron volts.
110
A negative response for a detection tube may be more informative than a positive one why?
Since in can exclude number of potential chemical contaminants.
111
Advantage of FID vs PID?
FID's are not restricted by IP because it burns the actual material allowing higher PPM and allow identification of the gas or vapor.
112
Transport packaging containing radioactive material is read how?
millirem/ hr @ 1 meter from the surface of the box.
113
oxygen enriched atmospheres are what %?
greater than 23.5%
114
ambient air for calibrating and 02 sensor should be what %?
20.9%
115
Detector tubes detect what?
only if a chemical is present
116
what 2 modes do FID's work in?
Survey and gas chromatography.
117
PID's are designed to detect what?
organic vapors or gases in low PPM range.
118
What is survey mode with a FID?
translates organic vapors into concentration of PPM.
119
The time it takes the instrument to obtain the sample and produce readings is called what?
Response time.
120
What is retention time?
the amount of time a substance remains within the column of the GC .
121
Define Permeation?
Movement of chemical through a material on the molecular level.
122
Limitations of level B suits
No permeation protection from gases or vapors May still leak liquids No thermal protection.
123
when did soft permeable lenses become allowed?
Feb 1998 OSHA.
124
What needs to needs to be logged at a minimum for CPC?
``` Date of purchase manufacturer vendor serial # markings color material destruction date and disposal. ```
125
when should the mission briefing take place?
prior to members being suited up in CPC.
126
What is a major limitation of an "SAR"
hose length limited to 300ft. | Not approved in IDLH atmospheres unless equipped with an emergency escape SCBA.
127
what is the minimum ratio to dress in protective clothing?
1:1
128
where do instructions for donning and doffing clothing come from?
manufacturer.
129
Define Degradation?
Change in a material caused by contact with another agent.
130
The first glove as the underglove should be which type?
nitrile - thin surgical type glove.
131
What are the best methods to ensure heat related stress do not compromise hazardous entries from personnel?
Pre-donning physical and proper hydration.
132
What is a major limitation of an "APR"
Cannot be used IDLH or 02 deficient atmospheres (<19.5% 02) Only protects against specific chemicals. Not Positive pressure.
133
What is an "APR"
Air purifying respirator.
134
What is a disadvantage of closed circuit SCBA?
inability to inflate a level A suit.
135
Limitations of Level C suits?
Very use limited only for controlled situations. | No thermal protection.
136
NFPA donning recommendations V/S?
``` BP < 150/90 HR < 70% of max HR (220-age) RR<24/min Oral temp 97f - 99.5f Core temp 98f-100.5f No sick S/S or new medication including OTC for 72hrs No ETOH in last 6hrs ```
137
Describe level B protection?
NFPA 1992-highest level of respiratory protection Protects against contacts with spills or splashes. not- fully encapsulated --no permeation barrier/ just "Penetration" not to be worn with dangerous gases or vapors no thermal protection.
138
Limitations of a Level A suit?
bulky reduced mvt communication is difficult. physically stressful.
139
Describe Level A protective equipment....
Falls under NFPA 1991 provides highest level of respiratory and skin protection. Should have flash protection. Inner and outter gloves resistance of 60min Pass 21 chemical tests for permeation.
140
Penetration time criteria?
Garment must not show any leakage for 60min of continuous spray of water.
141
What issues are to be considered when wearing chemical protective clothing?
Buddy system communications working with tools In- sight work.
142
Describe Level C protection?
NFPA 1993- Respiratory uses a APR (lower respiratory protection) Allows for splash or leak protection from liquids that are KNOWN. Does not constitute a health hazard if exposed. Limited to support zone activities.
143
What are the visible signs of degradation?
charring, shrinking, softening, cracking, dissolving.
144
Define Actual break-through time?
When the detector first detects the chemical on the material being tested.
145
If a chemical does not appear on the clothing for resistance, what can be done?
consult a chemical compatibility and product properties chart.
146
Normalized break-through time is defined as?
0.1ug/cm2/min @80.6F.
147
Define Penetration?
A "leak". Movement of chemical through existing openings in a material or garment.
148
The best course of action when determining what to wear in a flammable environment is?
Change the atmosphere.
149
Describe Level D protection?
Normal workplace protections and conditions. No NFPA standard for Level D. Use for in NON-EMERGENT situations.
150
Easiest and most dangerous way for exposure from hazardous materials is?
through the respiratory system.
151
Simple testing for level A garments consists of what?
visual inspection and gastight integrity.
152
The OSHA law governing Respiratory equipment requires what type of notification to employees?
Written.
153
OSHA standard for selection, use , testing , cleaning, maintenance...
1910.134 1998 edition.
154
A good donning team will a backup team ready in how many minutes?
less than 1.
155
level of protection for doffing persons out of CPC is determined by who?
safety officer and or group sector supervisor.
156
How should entry and back-up persons dress in CPC?
at the same rate and same level of dress.
157
Simple testing of Level B garments consists of what?
visual inspection only.
158
What is the function of a butyl glove?
primarily to protect the ensemble glove not chemical resistance.
159
What is the last item removed of CPC?
Respiratory protection.
160
What is a "SAR"
supplied air respirator.
161
What steps are to be taken prior entry in exclusion zone?
``` Tactical plan completed site safety plan ICSHM-208 Pre entry briefing back up team ready PPE verified Decon established. ```
162
What is an INITIAL strategy that can be used in DEFENSIVE mode?
Spill control.
163
12 activities of the hazmat group supervisor
1. briefing 2. control zones 3. public protection actions 4. weather 5. environment monitoring 6. site safety plan 7. safety meetings 8. develop IAP 9. safe SOP's followed 10. PPE 11. notifications made 12. 214 forms
164
Entry monitoring is monitoring for what initially?
IDLH and PEL
165
When the decision NOT to execute and order what happens?
must be documented in writing by the hazmat group supervisor referencing the SOG or safety guidelines.
166
who has the authority to terminate any strategy or tactic considered unsafe ?
Hazmat group supervisor.
167
Notification of Decontaminated patients going to a facility should be told what information?
``` Number of patients type and amt of contamination medical conditions time of arrival migratory times of other victims coming on their own. ```
168
IF no contractor or responsible party is available then what?
Department of environmental protection may be utilized. Last resort- may contract for disposal at the expense of the AHJ.
169
When does rehab begin for entry and decon personnel?
immediately upon exit from the decon corridor.
170
What does Level C CPC provide for protection?
solid and liquid splash with known atmospheres and no IDLH NFPA 1993
171
RHMRT have how long to respond once requested?
5 minutes
172
Max amt of time in level A CPCina 24 hour period?
2 cycles of work.
173
RHMRT site safety plan document #
ICS 208HM
174
Minimum number of technicians to start offensive ops?
7- seven
175
What is the curriculum that a hazmat group supervisor must complete?
Florida state emergency response commissions guideline for public sector hazardous materials training. Hazardous materials incident commander and OSHA 29 CFR 1910.120 (q)(6)
176
What factors determine the Exclusion or HOT zone
the area most affected by the release TLV will be marked by physical boundaries Refuge are near reduction corridor.
177
With regards to Decontamination what is the primary objective?
Prevention
178
what is the rest time for max amt of time in level A CPC?
60 min.
179
How is contamination prevented according to the RHMRT?
``` minimize contact w/ substances protecting instruments using remote sampling techniques disposable CPC protecting and wearing SCBA ```
180
How are hazardous materials identified with regard to train cars?
the word "DANGEROUS" is marked beneath the car.
181
How are operational periods organized?
initial- 4hrs greater than 1 entry- may request add'l team greater than 4 entries - requires IC notification extended ops defined as: (2) 4hr ops periods or greater than 4 entries
182
what is the time limit of work in level A CPC?
20 min at temps above 70F
183
Medical exam to include what? in addition to regular physical?
``` Complete h/p occupational hx. heavy metals screening RBC cholinesterase stress test. ```
184
Refuge area is defined as what?
area designated for contaminated persons within the exclusionary/ initial isolation zone .
185
If hazmat victims are in immediate life threatening situations that require medical attention what should be done?
emergency gross decon.
186
ERG is good for directions up to what time frame?
30min.
187
Exclusion zone GUIDELINES for establishment ?
toxicity based on reading greater than published TLV/TWA or PEL Any flammability reading from a CGI O2 deficient <19.5% or enriched >23.5% radioactivity w/ readings above backround
188
When do hazmat victims become patients?
after decontamination.
189
How often are medical records reviewed?
q 4 yrs
190
Control zones are determined by what factors?
``` chemical properties physical properties physical state Size and condition of container Amt of product leaking natural barriers weather recognized standards from resources. ```
191
Monitoring protocols and procedures fall under what compliance standards?
OSHA 1910.120, 40 part 311 NFPA 471
192
is a level 3 response
Severe incident
193
The best positioning of vehicles with variable winds is?
uphill.
194
Who establishes command on an incident?
the first arriving fire rescue unit or senior official having authority.
195
Constant monitoring after entry will continue till?
till v/s are returned to pre-v/s status. 3.0% of total body weight is an issue.
196
What is a level 4 incident?
``` classified as major or severe release of chemical over extended area. Will spread to a larger area. HIGHLY TOXIC, VERY REACTIVE UNSTABLE flammable/explosive. Affects large area and several hours ```
197
The adequate supply of medication required to be maintained in the Tox box is what?
Enough medication to treat 4- 100kg pt's per Florida regional common EMS protocols.
198
On level II incidents hazmat materials are contained or secured to what extent?
only to the extent that there is no longer an immediate threat to life, property, or environment outside the emergency site.
199
Parameters for CGI action levels?
known product >50% LEL Unknown >25% LEL confined space >10% LEL <10-16% most CGI's will not operate properly < 19.5% O2- wear SCBA while monitoring 23.5% for fire potential of confined space 25% fire potential consult specialist
200
what is a level 1 response?
``` dealing w/ known substances no deaths or injures limited area less than 300ft less than 25 gallons evacuation not more than 4 hrs ```
201
Technical details may be provided to the IC/PIO if selected by who?
Hazmat group supervisor.
202
When can RHMRT supervisor transfer responsibilities to another group supervisor?
with the concurrence of the IC.
203
How often do supervisors and coordinators meet to implement changes to response plan, SOG's, equipment, and training?
Quarterly
204
What is Level B CPC protection for?
protection from liquid splash and particulate exposure.
205
Purpose of emergency response plan?
provide RHMRT with county wide organization to mitigate an emergency involving Hazardous materials.
206
Private contractors for clean-up shall meet what standard and use PPE deemed necessary by who?
29 CFR OSHA 1910.120 Incident commander, safety officers or hazmat group supervisor.
207
Who or which agency is responsible for which zones?
1- PBC 2-WPB 3-PBC 4-Boca/delray
208
Supplied air lines have a maximum length of?
300ft from the air source
209
Palm Beach county Hazmat ordinance?
98-13
210
First response agency technicians can be utilized in what positions only?
Any positions except Entry team members or Hazmat group supervsor.
211
Overall success of an incident depends on what?
initial operations set up by first arriving agency.
212
What staffing is needed prior to teams making entry?
Dedicated rescue w/ paramedics for entry. | If entry is into an IDLH then Toxmedics are required
213
what is the role of RHMRT?
confinement and containment, then incident priorities.
214
Monitoring for unknown products will include?
``` radioactivity Radioactivity- 100mR/hr pH PH - <4 or >12 Combustibility oxygen levels <12.5 LEL>10% of LEL H2S CO organic vapor colormetric tubes chemical WMD biological agents ```
215
The ICS structure for a hazmat incident is based on what?
the incident needs.
216
What is the minimum distance that allows for a a safe retreat?
330ft
217
If a contractor resists working with proper PPE then?
compliance should be coordinated through entity contracted, if no compliance then activity for contractor to be terminated until in compliance or another contractor is procured.
218
Research of a product will consist of the what items?
``` physical properties PPE Decon first aid antidotes incompatability ```
219
What are the pre-entry V/S parameters?
``` BP < 160/100 HR< 120 RR <24 Oral temp >100F (DOT is 97-99.5) recent medical hx new medications open skin conditions or severe sunburn chemical sensitivity Upon concurrence of paramedic and assistant Safety officer. ```
220
How is the seven (7) person team made up?
``` 2-entry 2-backup 1-decon leader 1-hazmat group supervisor 1-hazmat safety officer ```
221
How is zone 4 notified for a hazmat response?
Through Boca Raton communications center by direct telephone line and Boca will contact Delray beach communications center.
222
Level A CPC gives what protection
highest skin, respiratory , and eye protection 1991 NFPA standard.
223
Who gets notified when situation is IDLH and involving extremely hazardous substances?
``` Need for Toxmedic (4) FRO for decon ops palm beach county dept emergency mgt. PBCDEM county warning point CWP state warning point SWP Florida division of emergency mgt ```
224
The heat stress index is defined as?
above 90F .
225
How often does Level A CPC get tested?
Annually.
226
Radiation action levels?
2 x background requires high and low range dosimetry.
227
When does a person become assigned to research of a chemical?
When the level of response is II, III, IV.
228
is a level 3 incident
Severe incident injuries or deaths may have already occurred large area, impacting essential services large amt of hazardous substance or LIMITED VERY hazardous sub.
229
What is the number of resources that should be used for researching a chemical?
at least 2 preferably 3.
230
Individual response units will acknowledge what information on PBCF tactical channel fire main?
Enroute to call and request a channel for assignment. arrival at incident commencing EXTENDED operations - (if after 4 hours) Completed assignment and available.
231
Medical exams are conducted when?
``` at least q 12 months prior to assignment and exit from a team as deemed necessary by a physician upon s/s of an exposure. cases of suspected exposure above a PEL. ```
232
Operational persons will operate in what mode during hazmat incidents
Defensive mode.
233
electrolyte solutions are ?
50/50 .
234
The county Emergency response plan will be reviewed how often?
AT LEAST annually.
235
Who assumes command in the absence of a formal command structure or IC?
Hazmat group supervisor.
236
Technical resource assistance includes what resources?
agencies and resources listed on RHMRT resource list chemtrec/ national response center industry technical representatives and hotlines manufacturer and product institutes governmental or environmental resources.
237
What are the shipping papers call for a train?
waybills are shipping for products- the CONSIST gives order of cars.
238
How often does post entry eval occur?
immediately after exiting and 10min.
239
Purpose of establishing control zones?
designate areas of specific function limit levels of contamination provide areas of safety for first responders and public
240
What is the minimum level of CPC when monitoring initially?
Level B
241
Support Zone- COLD zone critera
stages command and control functions functional area for decontaminated victims area for staging, media and non-essential personnel.
242
Hazmat control guidelines include:
``` plugging and packing of containers product transfer overpack drums flairing of gases direction of defensive operations diking, confinement and redirection of materials Neutralizaton venting guidelines vapor dispersion or suppression. ```