Analytical Methods to Meet NJDEP Groundwater Quality Standards for 1,4-Dioxane
Alpha Analytical has provided this Technical Bulletin to assist our clients in understanding the analytical methods conﬁguration necessary to meet the revised NJDEP Ground Water Quality Standards (NJ-GWQS) (N.J.A.C. 7:9C).
In November 2015, NJDEP revised the Interim Ground Water Quality Criteria for 1,4-Dioxane (CAS #123-91-1) from 10ug/L to 0.4ug/L (eﬀective 11.30.15).
In 2013, USEPA moved 1,4-Dioxane from the Target Compound List (TCL) VOC list to the TCL SVOC list.
NJDEP guidance encourages LSRPs to use professional judgment at any site to address this or any compounds based on knowledge of site-speciﬁc conditions and project-speciﬁc objectives.
Determination of 1,4-Dioxane by EPA Method 827O in Selected Ion Monitoring (SIM) mode with Isotope Dilution meets the revised NJ-GWQS of 0.4ug/L. Alpha Analytical holds NJDEP certiﬁcation (MA#935) for this analytical approach in groundwater (non-potable water). Alpha Analytical is a NELAP accredited laboratory.
Sample Collection Guidelines:
This analytical approach for 1,4-Dioxane requires the water sample collection guidelines below:
Lab Reporting Unit (ug/L)
|Bottle Order||Hold Time|
|1,4-Dioxane||123-91-1||0.4||0.15||2 x 500mL Amber (no preservative, cooled to 2o C)||7 Days (to extraction)|
Please contact your Alpha Analytical Project Manager or Account Representative for more information.
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