ISE has again raised the environmental bar to new levels by adding Mass Spectrometry to our list of in-house air quality monitoring services. Our SRS UGA300 mass spectrometer also allows our research staff to expand its investigative research capabilities down to the atomic level.

With the ability to detect materials having weights up to 300 atomic mass units (AMU's), and rapidly compare test samples against 192,262 different chemical compounds using the NIST08 Mass Spectral Library database search program, the use of mass spectrometry allows ISE to quantify with great accuracy test samples for heavier and more difficult to detect elements and compounds such as lead, mercury, arsenic, as well as radioactive gasses such as Radon.

The photo shows a standard Tedlar bagged air sample being tested.

What's New at ISE...

Acoustical Analysis & DesignISE\'s staff is formally trained in the requisite fields of acoustics, fluid mechanics, and gas dynamics allowing us to...
Environmental Impact ReportingAll of ISE’s technical services are available in a variety of environmental formats to satisfy local, state, and feder...
Geophysics & Blast Response Mitigation at ISEISE has been working for close to two decades on innovative and unique engineering solutions to the p...
Environmental GIS Solutions at ISEISE provides a comprehensive set of cost-effective Geographic Information System (GIS) mapping services built around...
Modal Analysis Services Available at ISEModal analysis is the experimental determination of the vibrational properties (i.e., normal modes) of a physi...
ISE has completed work on our laser optics test bench. The focal point is our newly built one-watt Class IV 655nm continuous wave (CW) laser capable o...
We\'ve received several inquiries on how civil modal analysis is performed and what instruments are used. Shown in the photo is ISE\'s \'modal sledgeham...
Expert Witness & Litigation AssistanceAt the heart of any forensic problem involving the laws of physics are two fundamental quantities: the path ...
The following article is an opinion piece that reflects the scientific thoughts of the author. It is my opinion based upon my review of the science an...
ISE has again raised the environmental bar to new levels by adding Mass Spectrometry to our list of in-house air quality monitoring services. Our SRS ...
       ISE 2024 Statement of Qualifications (SOQ)Click on the image to the left to view our Statement of Qualifications (32.4 MB) as a PDF. You c...
We\'re not sure how well this works, but you have the give the City of San Francisco a \'A\' for effort.This sign is located at the bottom of Lombard Str...
The ISE Rayleigh Wave (R-Wave) seismic vibration prediction model hit another milestone in 2011 in development by being able to accurately predict sur...
Historic Preservation PlansISE’s structural risk assessment services are a natural extension of our structural dynamics services. We take the concep...
Here\'s a photo from the archives of the Olivenhain Dam inundation area circa 1998 prior to construction of the dam. ISE took this photo during some e...
Laboratory Shake Table Testing at ISEISE houses a complete dynamic analysis laboratory consisting of an APS Dynamics long stroke shake table, capable...
ISE is currently developing a robust method for the determination of structural defects within laminated composite aerospace structures. The current m...
Historic Preservation Services at ISEISE’s historical preservation services are a natural extension of our structural dynamics services which we hav...
 Lots of people have heard of the Horton Grand Hotel in downtown San Diego, CA. Here\'s a view of the hotel that not too many people see - a view from...
The current version of the ISE Industrial Source Model (IS3) is sure to make the competitors cringe. Version 3.9 touts some highly advanced features s...

Featured Video Clip (Shock Wave)

A video taken by ISE showing the supersonic expansion of high pressure natural gas in a pipeline. 

The shock wave is clearly visible at the 1:00 min mark as a white cloud above the end of the pipe and produces an acoustic overpressure of close to 140 dB - which is as loud as a rocket engine.