Customer Service

LABConnect™ - Online Results & More

Tutorial | Create Account | Login

Hexavalent Chromium Testing


HEXAVALENT CHROMIUM

              

New OSHA Standard (1910.1026) is in effect

EMSL can provide sampling pumps and media for your upcoming Hexavalent Chromium sampling project!

Hexavalent chromium (Cr(VI)) compounds are a group of chemical substances that contain the metallic element chromium in its positive-6 valence (hexavalent) state. Occupational exposures to Cr(VI) occur during the production of stainless steel, chromate chemicals, and chromate pigments. Cr(VI) exposures also occur during other work activities such as stainless steel welding, thermal cutting, chrome plating, painting, and coating processes. Stripping and painting of aluminum surfaces, such as aircraft fuselages and aluminum castings are of particular concern due to widespread use of zinc chromate primers, which have ‘etching’ properties that enable better paint adhesion. These primers are also finding increasing application on galvanized steel products, including automobiles.

NIOSH considers all Cr(VI) compounds to be potential occupational carcinogens. An increased risk of lung cancer has been demonstrated in workers exposed to Cr(VI) compounds. Other adverse health effects associated with Cr(VI) exposure include dermal irritation, skin ulceration, allergic contact dermatitis, occupational asthma, nasal irritation and ulceration, perforated nasal septa, rhinitis, nosebleed, respiratory irritation, nasal cancer, sinus cancer, eye irritation and damage, perforated eardrums, kidney damage, liver damage, pulmonary congestion and edema, epigastric pain, and erosion and discoloration of the teeth.

Cr(VI) compounds vary in solubility from those that are readily soluble to those which are practically insoluble in water. In 1975 NIOSH documented the carcinogenic effects of water-insoluble Cr(VI) compounds. The NIOSH 1988 testimony to OSHA on the air contaminants standard recommended that all Cr(VI) compounds, regardless of their degree of solubility in water, be considered occupational carcinogens. NIOSH is currently reviewing and evaluating the available information on Cr(VI) compounds including the toxicology, health effects, industrial hygiene, and analytical chemistry literature in order to update its 1975 criteria document on Cr(VI).

SAMPLING INFORMATION:
The OLD OSHA limit (PEL) for construction** was an 8-Hour TWA of 100 ug/m3.

This was also expressed as 0.1 mg/m3 and, somewhat confusingly, 1 mg/10m3.

The NEW OSHA limit (PEL) for all industries is an 8-Hour TWA of 5ug/m3.

This also implies a new Action Level of one-half of the PEL, or 2.5 ug/m3.

The new regulation became effective on 5/29/2006 (90 days after publication).

The new PEL will be in force after 8/27/2006 (180 days after publication).

The OLD NIOSH 7600 Method has a practical quantitation limit of 2.8 ug/m3.

The NEW OSHA ID-215 Method*** has a practical quantitation limit of 0.5 ug/m3 (still improving – hoping for 0.1 ug or better).

BE CAREFUL – OSHA ID-215 Version 1 incorrectly lists the PEL as 0.5ug/m3. Use Version 2.

Important Note For Sampling Plating, Electropolishing, and Conversion Operations

Plating and other operations where acidic aerosols are produced can reduce the CrVI on the sample to CrIII over time. These samples must be analyzed or buffered within 6 days of sampling. You MUST indicate plating operations on the chain of custody (COC).

 

Important Note For Stainless-Steel Welding Operations 

Iron particles from stainless-steel welding can reduce the CrVI on the sample to CrIII over time. These samples must be analyzed within 8 days of sampling. You MUST indicate stainless welding operations on the COC . The same applies to sampling mild-steel welding operations for CrVI.  

 

Important Note For Spray-Painting Operations 

Any Cr(VI) in a spray-paint sample on the filter must be extracted additionally with a hot 5% NaOH/7.5% Na2CO3 extraction solution with the mixture of phosphate buffer/Mg(II) (see ID-125 Section 3.5.7.). You MUST indicate spray-painting operations on the COC.

Have a question, contact us!
Vincent Daliessio, CIH
EMSL Analytical, Inc.

Ann Arbor, MI - NVLAP Lab Code 101048-4Atlanta, GA - NVLAP Lab Code 101048-1Baton Rouge, LA - NVLAP Lab Code 200375-0Beltsville, MD - NVLAP Lab Code 200293-0Boston, MA - NVLAP Lab Code 101147-0Buffalo, NY - NVLAP Lab Code 200056-0Calgary, Alberta - NVLAP Lab Code 500100-0Carle Place, NY - NVLAP Lab Code 101048-10Charlotte, NC - NVLAP Lab Code 200841-0Chicago, IL - NVLAP Lab Code 200399-0Corporate - Cinnaminson, NJ - NVLAP Lab Code 101048-0Dallas, TX - NVLAP Lab Code 600111-0Denver, CO - NVLAP Lab Code 200828-0EMSL Canada - Montreal -- Quebec - NVLAP Lab Code 201052-0EMSL Canada -- Toronto - NVLAP Lab Code 200877-0EMSL Canada Inc. -- Ottawa - NVLAP Lab Code 201040-0Fort Lauderdale - NVLAP Lab Code 500085-0Houston, TX - NVLAP Lab Code 102106-0Huntington Beach, CA - NVLAP Lab Code 101384-0Indianapolis, IN - NVLAP Lab Code 200188-0Inland Empire, CA - NVLAP Lab Code 600239-0Kernersville, NC - NVLAP Lab Code 102104-0Las Vegas, NV - NVLAP Lab Code 600140-0Miami, FL - NVLAP Lab Code 200204-0Minneapolis, MN - NVLAP Lab Code 200019-0New York, NY - NVLAP Lab Code 101048-9Orlando, FL - NVLAP Lab Code 101151-0Pasadena, CA - NVLAP Lab Code 200232-0Phoenix, AZ - NVLAP Lab Code 200811-0Piscataway, NJ - NVLAP Lab Code 101048-2Plymouth Meeting, PA - NVLAP Lab Code 200699-0Raleigh, NC - NVLAP Lab Code 200671-0Rochester, NY - NVLAP Lab Code 600183-0S. Portland, ME - NVLAP Lab Code 500094-0Salem, NH - NVLAP Lab Code 201051-0San Diego, CA - NVLAP Lab Code 200855-0San Leandro, CA - NVLAP Lab Code 101048-3Seattle, WA - NVLAP Lab Code 200613-0St. Louis, MO - NVLAP Lab Code 200742-0Tampa, FL - NVLAP Lab Code 600215-0Vancouver, BC - NVLAP Lab Code 201068-0Wallingford, CT - NVLAP Lab Code 200700-0West Palm Beach, FL - NVLAP Lab Code 600206-0Weymouth, MA - NVLAP Lab Code 600217-0
Sorry, this function is disabled.