HDIM

Question 1

What does HDIM stand for?

Answer 1

Hazmat
Detection
Identification
Monitoring

Question 2

State CBRNe and examples

Answer 2

Chemical - Nerve, Blister, Blood, Lung (CWAs)
Bio - anthrax, small pox, plagues
Radiological- RDD, ionising
Nuclear - fission
Explosives - highest risk

Question 3

Risk formula

Answer 3

Risk = severity x likelihood

Question 4

What is the defined as O2 deficient?

Answer 4

<19%

Question 5

What is the definition of O2 enriched atoms and what is the key issue?

Answer 5

23% or more

Expands explosive limits of gases

Question 6

What are the 3 Rs

Answer 6

Remove (themselves)
Remove (clothing)
Remove (from skin)

Question 7

What determines wet or dry Decon?

Answer 7

If agent burns or blisters, wet.

Question 8

What is 1 ppm as a percentage?

Answer 8

0.0001% or 1/10,000

Question 9

Workplace exposure limits relate to what two time lengths and where is that info found?

Answer 9

8hrs and 15min.

Info available on chemdata, in info section.

Question 10

Explain WEL ‘traffic light’ system.

Answer 10

Green. Ppm below 8hr WEL, NO RPE required
Green above 8hr ppm, but below 15min no rpe required for 15 min
Amber. Suitable respirator required
Red. Above IDHL, Ba

Question 11

What do WEL and IDHL stand for?

Answer 11

Workplace exposure limits

And Immediately dangerous to life and health

Found in EH40 and Chemdata

Question 12

What does ICE stand for

Answer 12

Individual chemical exposure

Question 13

When do GASTEC flammable Alarms sound?

Answer 13

1st - 10% LEL
2nd - 20% LEL
3rd - 60% LEL

Calibrated to methane, some LELs are far broader.

At 23% O2 level LEL is anything greater than 0%

Question 14

What does RDD stand for?

Answer 14

Radiological Dispersal Divice

Question 15

What types of hazardous atmospheres are there?

Answer 15

O2 deficient - 19% and below
O2 enriched - 23% and above
Flammable - 10% LEL
Toxic - including Corrosive outside 2-11 PH

Question 16

What are are conversion factors for

%, ppm, ppb, ppt

Answer 16

Ppm to % is time or divide by 10,000

Ppm - Ppb is times or divide by 1000

Question 17

GASTEC GFG

O2 alarms

Answer 17

1st alarm - 19%
2nd alarm - 17%

3rd alarm - 23%

Question 18

GFG - GASTEC

What do GFGs detect and when do they alarm?

Answer 18

GFG1
Ammonia NH3
Chlorine Cl2

GFG2
Carbon Monoxide CO
Hydrogen Sulphide H2S
Hydrogen Cyanide HCN

1st Alarm - WEL A1 (8hr)
2nd Alarm - WEL A2 (15min)

Question 19

GFG test

Answer 19

Weekly & before use

Turn on (R)
8 min warm up
Zero (mid & r) then air (L)

Blow test (o2 alarm 1)

Question 20

PID Test

Answer 20

Pump stall (finger over)
Humidity (cup hand)
Bump (isobutylene
9ppm (9000ppb) - 11 ppm

Question 21

Drager Tubes Test

Answer 21

Before use
Inspect all kit and check dates
Tip arrows point with flow
1 min leak test (assembled)

Monthly
Inspect all kit
1min leak test with unopened tubes

Question 22

HAZMAT ID test

Answer 22

Before Use / Monthly
Turn on
Warm up
Login > Advanced > Diagnostics > Validation
Clean and use validation slate

Weekly
Check background reading
Check battery
Visual

Question 23

Hapsite smart plus test

Answer 23

Visual inspection 
Open front and insert gas
End standby 
Wait for system to warm up if ‘preparing system’ if not press ‘prepare’
Connect Wi-fi 
Open iq application 
Wait for system ready
Run survey until TIC is steady 
Run analyse 
Compare standards (+-10s)
DA 1.2 min 
TRIS 2.3 min 1/3 - 1/2 BPFB 
BPFB 8.0 min 1-3m TIC
Base 1/10 BPFB

Question 24

Hapsite Use

Answer 24

Before use Test
Login > advanced > diagnostics > Validation >

Start > simplified (HAPSITE checks background)
Incident ID & sample / test ID (initials, T01 S02 or incorporate police ID).
Place sample hammer down non liquid

Absorption > 0.1
No negative

Flat or grassy mean salt (no absorption)
Rising gradient means elemental (C2 etc)

Check at 1/3 zoom

Peak time importance not height

“Extra pink, time to think” - Search residual

“Extra blue, can’t be true” - extra blue peaks mean result invalid.

Must contain 10% to detect