Additional Contaminants of Concern

1,4 Dioxane in Soil and Groundwater

TriadES can provide on-site analysis of 1,4 dioxane in GW and soil using the DSTIMS as the detector. Using solid phase micro extraction (SPME) and thermal desorption into the DSITMS, TriadES can detect 1,4 dioxane in GW at 1-2 ug/L. Using methanol extraction for soil samples and direct injection of the extract into the DSITMS, we are able to detect 1,4 dioxane at levels down to 50 ug/kg. Using the DSITMS on-site allows project managers to use high resolution site characterization to investigate 1,4 dioxane sources and plumes in a single deployment.

PCB in Soil

TriadES has developed a rapid extraction of PCBs from soil and direct injection analysis using the DSITMS. The approach allows on-site, real-time analysis of PCBs in soil down to 0.5-1 mg/kg. The method is able to determine PCB homologs based on chlorine content and to report contaminants as Aroclors. Using this analysis we can provide our clients up to 50 discrete soil analyses/day for PCBs. The use of this approach allows cost effective high resolution site characterization of PCB contaminated site.

Petroleum in Soil using Ultra Violet Fluorescence

In addition to our DSITMS technology, TriadES can quantitatively analyze soil samples on-site using methanol extraction and ultra violet fluorescence (UVF) analysis to provide GRO, DRO, TPH and PAH analyses in high density and real-time. TriadES employs the Site Lab UVF analytical system to provide 3-5 minute sample turn around for discrete soil samples. The methanol extraction is essentially US EPA Method 5035 extraction for high level VOC contamination. We are able to perform the UVF analysis on the same sample extracts we use to analyze benzene, toluene, ethyl benzene and xylenes (BTEX). The use of UVF analysis allows project managers to cost effectively collect high resolution data on the TPH at the same time they are collecting BTEX using the DSITMS.

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