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Photoionization Detectors (PID)

Used measure volatile organic compounds and other gases in concentrations from parts per billion (ppb) to parts per million (ppm)


PID
is a very sensitive instrument used in a wide variety of applications such as:


Hazardous waste sites
Clean-up of spills

Protecting workers from toxic vapors at Refineries

Leak detection for compliance at Pulp and paper plants

Hazardous materials response for Terrorist chemical attacks

Photoionization Applications

Environmental - Screen VOCs emitted from contaminated soils and leaking storage drums
Toxic Hazardous Waste Monitoring- disposal sites, industrial plants, closed military bases, hazardous waste transportation
Drum Monitoring- Monitor hazardous waste containers at old disposal, landfills, garbage sites, closed industrial plants and military sites

PID for EPA Method 21 Compliance
- EPA Standard for monitoring fugitive emissions in pipelines and chemical processing equipment
Soil Remediation- Leaking Underground Storage Tanks for detecting BTEX (benzene, toluene, ethylbenzene and xylene) as well as TPH (Total Petroleum Hydrocarbons) in gasoline, diesel and jet fuel storage tanks
Real Estate Transfers- Environmental soil contamination monitoring for due diligence and environmental impact studies prior to purchase
Environmental Remediation and Contaminated Air Treatment- Liquid scrubber absorption, activated carbon adsorption, thermal oxidation, and incineration

Headspace Screening
- Measure concentrations of VOC's in water or soil vapors
Toxic VOCs in Drinking Water Sources- Hydrologist and environmental engineers often use PIDs to monitor chlorinated solvents (carbon tetrachloride) and VOCs (toluene) in groundwater at drill and well sites or industrial plants, military bases or nuclear facilities, etc. Can also monitor water stripper effluents and off gases from wastewaters.
Soil and Water Headspace Screening

PIDs for Industrial Hygiene