Dakota Technologies LIF LINE
Laser Induced
Laser-Induced Fluorescence Primer
An article from Randy St. Germain, president of Dakota Technologies, on using the fluorescence of PAHs to screen for NAPL. 

Laser-induced fluorescence (LIF) employs laser light to excite fluorescent molecules contained in the majority of non-aqueous phase liquids (NAPLs) including petroleum fuels/oils, coal tars, and creosotes. Direct push logging of the NAPL's inherent fluorescence with depth provides rapid and cost-effective delineation of NAPL. Multiple LIF logs conducted at NAPL release sites provide a relatively non-subjective basis for a detailed NAPL conceptual site model. Read more.

 

Nielsen Field Conference See You at the North American Environmental Field Conferences
& Expositions
We invite you to join us as we hit the road in February and March to attend the 2012 Nielsen Environmental Field Conferences. At both the eastern and western conferences, Randy St. Germain, president of Dakota Technologies, will be speaking at the plenary session and hosting two LIF workshops. The Dakota Technologies crew will also have booths set up at the expositions. Read more.

L.U.S.T. Line
LIF Makes the L.U.S.T. Line
An article about the benefits of LIF technology appeared in the June 2011 issue of L.U.S.T.Line, a national bulletin published by the New England Interstate Water Pollution Control Commission. Read more.

 

Dye-LIF
Dye-LIF Call for Samples
Dakota is working with AMEC and researchers at Guelph (Canada) to develop and demonstrate a new technology called Dye-LIF. Our goal is to detect and characterize chlorinated DNAPL in the subsurface using modified versions of traditional LIF. Read more.

 

Where in the World is LIF?
Solid-Phase Extraction Using Solid-Phase Extraction in the Field
Barr Engineering recently conducted its first screening using solid-phase extraction samplers (otherwise known as Darts) from Dakota Technologies. The Darts were used at a crude oil release site in a peat bog, and they were found to be a quick, inexpensive and effective method of identifying NAPL. Read more.

 

Tech Tips Offset Sampling
When multiple methods such as LIF and soil sampling are used on one site, results often do not match across methodologies. LIF can quickly determine if a site is homogenous or heterogeneous through the use of offset sampling. Offset sampling involves performing a second LIF log within a few feet of an initial LIF log. Comparing the two logs will allow the consultant to gauge site heterogeneity.

 

Total number
of sites: 198

Total number
of logs: 8,899

Cities visited
in 2011:
Rochester, NY
Alameda, CA
Marshall, MI
St. Joseph, MO
Newark, NJ
Bethlehem, PA
St Helen, OR
Marion, OH
Ft Wayne, IN
Goshen, IN
Bemidji, MN
Albion, MI
Flint, MI  
San Pedro, CA
Putnam, CT
Middletown, CT
Waterbury, CT
Norristown, PA
Philadelphia, PA
Kinston, NC
Newark, NJ
Ellenville, NT
Bay Shore, NY
Cincinnati, OH
NOTES FROM THE FIELD CREW  

Our senior field geologist, Steve Adamek, is preparing to take his maiden flight on an aircraft he repaired himself. The aircraft, which he picked up in Arizona and hauled to North Dakota, had been damaged in a wind storm. So, after using plenty of rivets (and a sectioned-off area of the Dakota Technologies building), he's almost ready to take to the air. Stay tuned for a future edition of the LIF Line, where we'll either report on his success, or post an opening for a new field geologist.