Demonstration of the Gore Module for Passive Ground Water Sampling
Cost and performance rept.
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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The objectives of this project were to determine if the GORE Module, passive groundwater samplers, can provide 1 technically defensible analytical data for volatile and semi-volatile organic compounds VOC and SVOC and 2 substantial cost savings when compared with conventional low-flow purging and sampling methodology. To achieve these objectives, the Gore Technology was compared with conventional low-flow purging and sampling at two test sites the Southern Bush River section of Aberdeen Proving Ground APG, MD, and the former Pease Air Force Base AFB in Portsmouth, NH. At both sites, GORE Modules were placed at the same depth in the well as the pump or tubing used to collect the low-flow samples. Additional Modules were placed in most wells to allow the project team to profile analyte concentrations in the wells with depth. The wells were initially sampled with the GORE Modules i.e., the pre-purge samples, low-flow samples were collected, and finally a second set of Modules were collected i.e., the post-purge samples. Analytes at the APG site included several chlorinated VOCs tetrachloroethylene PCE, cis-1,2- dichloroethylene cDCE, trichloroethylene TCE, 1,1,2,2-tetrachloroethane 1122TetCA, and chloroform. VOCs and SVOCs at the former Pease site included benzene, toluene, ethylbenzene, and xylene BTEX, 1,2,4-trimethylbenzene 124TMB, 1,3,5-trimethylbenzene 135TMB, naphthalene, isopropylbenzene, and 2-methylnaphathalene.
- Hydrology, Limnology and Potamology
- Test Facilities, Equipment and Methods