Industrial Hygiene (IH) Sampling and Monitoring

Industrial Hygiene (IH) Source, Area & Personal Data

Tank Farm industrial hygienists have conducted emission source sampling and monitoring at breather filter outlets, above-ground riser penetrations, pit covers, etc. This was done to:

  • Identify the locations of emission sources for establishment of buffer zones
  • Confirm tank headspace and ventilation system characterization data did indeed represent maximum source concentrations
  • Test for selected source chemicals without conducting full headspace characterization

The IH source data with headspace characterization data can be used to identify what chemicals are likely to be present in the worker breathing zone and estimate their maximum concentrations, but worker protection must be based on actual workplace data. Workplace data can come from monitoring or sampling the worker breathing zone. Personal samples are collected to establish the time-weighted average (or other regulatory limit) concentration of vapors to which the worker has been exposed. Monitoring is conducted with direct reading instruments (DRI) and colorimetric devices (e.g., Drager tubes) that provide essentially real time field measurements. Sampling, which entails subsequent laboratory analysis of the samples, is conducted to identify and measure chemicals not specifically addressed by monitoring methods.

Area characterization data may be collected using sampling devices which have the capability of measuring the concentrations of all COPCs or through area monitoring devices capable of measuring some of the COPCs. Area characterization data are typically collected from several fixed locations considered representative of the worker breathing zone (not at sources such as the breather filter of an SST).

Industrial Hygiene (IH)

Sampling

Sampling pumps are utilized for area/personal sampling in conjunction with sample collection media and Tedlar® bags.


Sample Collection

tedlar-air-sample-bags

Tedlar® Air Sample Bags
Utilized to collect grab air samples for analysis on the Hapsite.

sampling-media

Sampling Media
Sampling media are processed through 222-S for analysis

hapsite

Hapsite®
Portable Gas Chromatography-Mass Spectrometer (GC-MS)

Direct-Reading Instrument (DRI)

Monitoring

Direct Reading Instruments (DRIs) are utilized to measure real-time vapor concentrations.
Examples include:

itx

iTX
Multi-gas monitor utilizing:
Electrochemical cell technology to detect ammonia, oxygen, carbon monoxide, and other toxic gasses.
• Catalytic bead sensor (Wheatstone bridge) to detect flammable gases

The ITX is used to detect the presence of flammable gases/vapors and oxygen. Up to four additional sensor options are capable of detecting the following: carbon monoxide, hydrogen sulfide, ammonia, nitrogen dioxide, sulfur dioxide and chlorine dioxide.
Industrial Scientific- iTX

multirae-pro

MultiRAE PRO
Combines the technologies of the ppbRAE and iTX.
Multi-gas monitor utilizing:
• Electrochemical cell technology to detect ammonia, oxygen, and carbon monoxide
• Catalytic bead sensor (Wheatstone bridge) to detect flammable gases
• Photo-ionization detector (PID) to detect total VOCs
RAE Systems- MultiRAE Pro

arearae

AreaRAE
Multi-gas monitor utilizing:
• Electrochemical cell technology to to detect ammonia, oxygen, carbon monoxide, and other toxic gasses.
• Catalytic bead sensor (Wheatstone bridge) to detect flammable gases
• Photo-ionization detector (PID) to detect total VOCs

AreaRAEs are capable of remote detection and can be placed in and around the farms at various locations for extended periods of time. Mainly used to detect VOCs and Ammonia in general area locations.
RAE Systems- AreaRAE

lumex

LUMEX
Utilizes ultraviolet technology to detect mercury vapors.
Ohio Lumex

miran-sapphire

MIRAN SapphIRe
Utilizes infrared technology to detect nitrous oxide and an extensive standard library of various other chemicals.
Miran SapphIRe

drager-sampling-tubes

Dräger Sampling Tubes
Sorbent colorimetric sampling tubes utilizing a billows-style pump to collect a snapshot, real-time, gas/vapor concentration.
Dräger- Sampling Tubes and Systems