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Title: FY02 Field Evaluations of an In-Situ Chemiresistor Sensor at Edwards Air Force Base, CA

Abstract

No abstract prepared.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
807060
Report Number(s):
SAND2002-4135
TRN: US200305%%272
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Dec 2002
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CALIFORNIA; MILITARY FACILITIES; FIELD TESTS; MONITORS

Citation Formats

HO, CLIFFORD K., MCGRATH, LUCAS K., and MAY, JAMES. FY02 Field Evaluations of an In-Situ Chemiresistor Sensor at Edwards Air Force Base, CA. United States: N. p., 2002. Web. doi:10.2172/807060.
HO, CLIFFORD K., MCGRATH, LUCAS K., & MAY, JAMES. FY02 Field Evaluations of an In-Situ Chemiresistor Sensor at Edwards Air Force Base, CA. United States. doi:10.2172/807060.
HO, CLIFFORD K., MCGRATH, LUCAS K., and MAY, JAMES. Sun . "FY02 Field Evaluations of an In-Situ Chemiresistor Sensor at Edwards Air Force Base, CA". United States. doi:10.2172/807060. https://www.osti.gov/servlets/purl/807060.
@article{osti_807060,
title = {FY02 Field Evaluations of an In-Situ Chemiresistor Sensor at Edwards Air Force Base, CA},
author = {HO, CLIFFORD K. and MCGRATH, LUCAS K. and MAY, JAMES},
abstractNote = {No abstract prepared.},
doi = {10.2172/807060},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 2002},
month = {Sun Dec 01 00:00:00 EST 2002}
}

Technical Report:

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  • Envirodyne Engineers, Inc. (EEI) evaluated the potential for ground water contamination at nine hazardous waste storage and disposal sites at Edwards Air Force Base, California. This evaluation consisted of an Initial Assessment Survey based on published and unpublished reports and records, interviews with base personnel, consultation with federal, state and local agencies, and site inspections. Five of the nine sites have little or no potential for ground water contamination. Two of the remaining four sites, the Industrial Waste Pond and the Main Base Toxic Waste Disposal Site, may have a limited potential for contamination of ground water. The remaining twomore » sites, the North Lake Bed Storage and Disposal Site and the South Base Waste POL Storage Site, have significant potential to contaminate ground water. At the North Lake Bed site, two subsites are in physical environments which are susceptible to ground water contamination. Ground water contamination at these subsites needs to be verified and the wastes removed. At the South Base Waste POL Storage Area, ground water contamination may have already occurred or may occur in the future. Ground water in the immediate vicinity of this site should be monitored to detect contamination before it migrates.« less
  • A wastewater characterization survey was conducted at Edwards Air Force Base from 17-28 February 1992 by personnel from the Water Quality Function of Armstrong Laboratory. Extensive sampling of the treatment plant influent wastewater and sludge beds was performed as well as sampling at nine other sites in the base cantonment area. Some sampling of an Imhoff tank on North Base, five evaporation ponds and the lakebed was also conducted. Low levels of organic contamination were found in the influent and industrial sites downstream of Site 7. Site 7 is a manhole located in an identified Installation Restoration Program (IRP) site.more » Corrective actions were recommended to prevent organic soil contaminants from intruding into this site prior to the operation of a planned tertiary treatment plant. Organic and inorganic contaminants discharged at other industrial sites were found to be in low concentrations and indicated that good shop practices were followed in minimizing contamination of the wastewater with industrial chemicals.« less
  • Numerical simulations, with the Subsurface Transport Over Multiple Phases (STOMP) simulator, were applied to the field demonstration of an in-well vapor-stripping system at Edwards Air Force Base (AFB), near Mojave, California. The demonstration field site on the Edwards AFB was previously contaminated from traversing groundwater that was contained a varied composition of volatile organic compounds (VOCs), which primarily includes trichloroethylene (TCE). Contaminant TCE originated from surface basin that had been used to collect runoff during the cleaning of experimental rocket powered planes in the 1960s and 1970s. This report documents those simulations and associated numerical analyses. A companion report documentsmore » the in- well vapor-stripping demonstration from a field perspective.« less
  • Selective ion exchange is one of the most effective treatment technologies for removing low levels of perchlorate (ClO{sub 4}{sup -}) from contaminated water because of its high efficiency without adverse impacts on the water quality caused by adding or removing any chemicals or nutrients. This report summarizes both the laboratory and a field pilot-scale studies to determine the ability and efficiency of the bifunctional synthetic resins to remove ClO{sub 4}{sup -} from the contaminated groundwater at the Edwards Air Force Base in California. Regeneration of the resins after groundwater treatment was also evaluated using the FeCl{sub 3}-HCl regeneration technique recentlymore » developed at Oak Ridge National Laboratory. On the basis of this study, the bifunctional resin, D-3696 was found to be highly selective toward ClO{sub 4}{sup -} and performed much better than one of the best commercial nitrate-selective resins (Purolite A-520E) and more than an order of magnitude better than the Purolite A-500 resin (with a relatively low selectivity). At an influent concentration of {approx} 450 {micro}g/L ClO{sub 4}{sup -} in groundwater, the bifunctional resin bed treated {approx} 40,000 empty bed volumes of groundwater before a significant breakthrough of ClO{sub 4}{sup -} occurred. The presence of relatively high concentrations of chloride and sulfate in site groundwater did not appear to affect the ability of the bifunctional resin to remove ClO{sub 4}{sup -}. However, the presence of high iron or iron oxyhydroxides and/or biomass in groundwater caused a significant fouling of the resin beds and greatly influenced the effectiveness in regenerating the resins sorbed with ClO{sub 4}{sup -}. Under such circumstances, a prefilter ({approx} 0.5-1 {micro}m) was found to be necessary to remove these particulates and to reduce the risk of fouling of the resin beds. Without significant fouling, the resin bed could be effectively regenerated by the FeCl{sub 3} displacement technique. Nearly 100% of the sorbed ClO{sub 4}{sup -} was displaced or recovered after elution with only {approx} 2-5 bed volumes of the FeCl{sub 3}-HCl regenerant solution. On the basis of both the laboratory and field pilot-scale studies, they therefore anticipate that a combination of the selective ion exchange and the FeCl{sub 3}-regeneration technologies may offer a cost-effective means to remove ClO{sub 4}{sup -} from contaminated groundwater with significantly reduced waste generation and operational cost.« less
  • A road test, performed on a SNAP 10A mass mockup system, indicated that shock and vibration inputs under actual conditions were not excessive. During the course of travel from the Santa Susana field laboratory to Edwards Air Force Base, and during field trials at Santa Susana, the test system was subjected to only two accelerations exceeding 2 g, and no inputs exceeded 2.4 g. It was concluded that shock and vibration to SNAP systems from highway transporation can be adequately controlled by: selecting the appropriate vehicie, providing proper packaging; specifying route and speed limits for various driving conditions; using ordinarymore » care in loading and unloading; and including suitable shock monitoring instruments with the shipment, (P.C.H.)« less