Sampling & Analysis



All samples sent to SGS Galson should be accompanied by our Chain of Custody Form. A copy may be obtained from our website. Copies of the Chain of Custody form are also available from our Client Services Department. Samples received after 3 p.m. are considered as part of our next day’s business.


Standard filter cassettes, sorbent tubes, specialized filters, tubes, impinger solutions are supplied free if the samples are returned to our labouratory for analysis. Certain passive monitors are also supplied free if the samples are returned to our labouratory for analysis and you are not already receiving a volume discount for work. Media not requiring refrigeration can be shipped via UPS ground at no charge. A purchase order or credit card authorization may be required prior to the shipment of media. Media not returned to our labouratory with samples for analysis will be billed after sixty (60) days.


In keeping with NIOSH and OSHA guidance on inclusion of sampler wall deposits in an analysis, SGS Galson has adopted a practice of wiping cassette walls where possible. The wipe is included with the sample filter through the preparation and analytical process. This may occasionally cause a discrepancy between certain analytical results and their corresponding gravimetric result (which represents the filter particulate only). For more information on Sample Wall Deposits see NIOSH Manual of Analytical Methods: Sampler Wall Deposits as well as various individual OSHA methods. 


In accordance with published sampling and analytical methods, field blanks should be submitted for each type of analysis requested in a given batch of samples, even if the batch consists of only one sample. Field blanks are prepared and analyzed along with field samples, and are not to be held for potential future analysis based on the results of field samples. Field blanks will be charged at the normal sample rate. See our Sampling & Analysis Guide and fee schedule.


Desorption efficiency (DE) varies with the lot of sorbent, concentration level, and with the number and types of compounds co-absorbed. Extra sampling tubes should be submitted with samples for the most accurate determination of DE. If tubes are not submitted, DE corrections will be based on existing labouratory data. Non-routine compound DE determinations will be performed as needed, and will be charged at the normal analyte fee.


For industrial hygiene analyses, we follow the current NIOSH Manual of Analytical Methods, OSHA Analytical Methods Manual, and other state or federal procedures. In addition we offer analytical method development services for proprietary compounds and other non-routine analytes.


Save time and money – Some analytes can be collected on the same medium and analyzed together. Compounds with the same compatibility Code in the Sampling and Analysis Guide may be collected on the same medium. See the comment section column for analytical discounts. Please review our Universal Solvent list under the Sampling & Analysis section of this site for further assistance.


Sampling pumps are available from SGS Galson through our FreePumpLoan program. Various pumps with all the necessary sampling accessories are available for loan. The customer is responsible for the shipment of the pumps to the sampling destination and back to the labouratory. Call us for more details.


SGS Galson realizes how important timely results are to our clients. We guarantee a five-day turnaround for routine industrial hygiene analysis. Results are faxed or e-mailed by 6 p.m. EST on the fifth working day following the day of sample receipt. A few non-routine analyses typically require more than five days to analyze, these exceptions are noted with an asterisk in the analytical technique column of the analyte listing. Rush turn-around can also be provided. Please confirm rush samples in advance by contacting our Client Services Department. The following surcharges will be added to the listed fees for results reported by 6 p.m. Eastern Time:

Same day 200%
Next day (12pm) 150%
Next day (6pm) 100%
Second day 75%
Third day 50%
Fourth day 35%

For example, if the listed fee for one sample with normal five business day turnaround time is $50.00 the following table would list what the cost including surcharges would be based on the following expedited turnaround times:

Turnaround Cost per sample
Standard Turnaround $50.00
Same day 200% $150.00
Next day (12pm) 150% $125.00
Next day (6pm) 100% $100.00
Second day 75% $87.50
Third day 50% $75.00
Fourth day 35% $67.50


Results are faxed or e-mailed at no additional charge. If a hard copy report is required it will be mailed within 24 hours of the time the results are faxed or e-mailed.


A few analyses require a subcontract labouratory. These analytical results are typically provided within 10 business days. Reports are provided to you in their entirety as soon as our labouratory receives them.


Reduced fees are available for more than one organic vapor, metal, or inorganic acid on a single sample. See the comment section in the Sampling & Analysis Guide. A 10% discount is applied to twenty (20) or more identical analyses when submitted at one time.


All sample results and labouratory reports are strictly confidential. Results will be provided only to the addressee specified on the Chain of Custody form submitted with the samples unless law requires release. We will require written permission from the addressee to release results to another party.


Samples, including any rejected samples, with several exceptions and where possible are retained for a minimum of 14 calendar days following the issuance of the final analytical report. IOMs are retained for 7 calendar days following the issuance of the final analytical report. Asbestos samples are retained for a minimum of 60 calendar days following the issuance of the final analytical report. Microbiological samples are retained for a minimum of 30 days following the issuance of the final analytical report. Samples may be retained for longer periods of time upon client request. Any unused portions of samples may be returned to a client upon their request.


SGS Galson warrants the test results to be of a precision normal for the sample type and methodology employed for each sample submitted. SGS Galson disclaims any other warrants, expressed or implied, including warranty of fitness for a particular purpose and warranty of merchantability. SGS Galson accepts no legal responsibility for the purpose for which the client uses test results. Our Standard Terms and Conditions govern any analytical work performed. Prices, methods and detection limits may be changed without notification. Please contact your client service representative for the most current information.


A completed credit application must be on file for us to extend credit. Purchase orders or credit card information must be submitted for us to release sample results. Payment terms are net 30 days. A monthly charge of 1.5% of the unpaid balance will be charged after 30 days. In the absence of an established credit arrangement or authorized purchase order, all analyses must be prepaid. We accept payments by Visa, MasterCard, American Express, Discover and Diners Club.


The quantitation limits provided within this guide are the most current limits determined at the time of printing. The limits are actual labouratory determined limits and are recalculated periodically in accordance with our Quality Assurance requirements. These limits are subject to change; however, they will seldom change significantly. Please contact a client service representative if the exact limit of quantitation is required.

CVAA   Cold Vapor Atomic Absorption  
DE   Desorption Efficiency  
DNPH   Dinitrophenylhydrazine  
ECD   Electron Capture Detector  
EDST   Eastern Daylight Savings Time  
EST   Eastern Standard Time  
FID   Flame Ionization Detector  
FL   Fluorescence Detector  
GC   Gas Chromatography  
GC/MS   Gas Chromatography/ Mass Spectrometry  
GFF   Glass Fibre Filter  
HPLC   High Performance Liquid Chromatography  
IC   Ion Chromatography  
ICAP   Inductively Coupled Argon Plasma Emission Spectrocopy  
IMIS   OSHA Salt Lake City Labouratory in-house file  
IOM   Institute of Occupational Medicine  
IR   Infrared Spectrophotometry  
ISE   Ion Specific Electrode  
LOQ   Limit of Quantitation  
MCEF   Mixed Cellulose Ester Filter  
MF   Membrane Filter  
NCO   Isocyanate Group  
NITC   1-Naphthylisothiocyanate  
NOB   Non-Organically Bound  
NPD   Nitrogen Phosphorus Detector  
OVS   OSHA Versatile Sampler  
PCB   Polychlorinated Biphenyl Compounds  
PDA   Potato Dextrose Agar  
PCM   Phase Contract Microscopy  
PEM   Personal Environmental Monitor  
PID   Photoionization Detector  
PLM   Polarized Light Microscopy  
PM   Passive Monitor  
PNAH   Polynuclear Aromatic Hydrocarbons  
PTFE   Teflon Membrane Filter  
PVC   Polyvinyl Chloride Filter  
STEL   Short Term Exposure Limit  
4Tbc   4-tert-Butylcatechol  
TEM   Transmission Electron Microscopy  
TSA   Tryptic Soy Agar  
UV   Ultraviolet Detector  
XRD   X-Ray Diffraction  
Method References

NIOSH Manual of Analytical Methods – Fourth Edition NIOSH Manual of Analytical Methods – Third Edition NIOSH Manual of Analytical Methods – Second Edition OSHA Analytical Methods Manual

Compatibility Codes


Charcoal and carbon disulfide desorption


Treated XAD-2 (2-(hydroxymethyl) piperidine and toluene desorption


Silica gel and 95% ethanol desorption


Tenax and carbon tetrachloride desorption


OVS Sampler and toluene desorption


Charcoal and 5% methanol in methylene chloride


Treated GFF (1-(2 pyridyl) piperazine) and acetonitrile/dimethyl sulfoxide desorption


Universal Solvent GC Method