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Deployment depths,deployment durations and analytical procedures will depend on the GORETPA SURVEY Environmental Site Assessment,Focusing Your Remediation
<br /> manufacturer's recommended procedures. Some samplers currently available can be Efforts,Soil Gas Sampling-Description of Service,W.L.Gore&Associates, Inc., 100
<br /> installed at any depth,and at the same sampling density as the active method. For Chesapeake Blvd,Elkton, MD.;www.gore.com/surveys.
<br /> typical soil gas sampling installation,a slam bar or electric rotary hammer-drill is used to
<br /> auger a 3/4 to 1-inch diameter hole to depth of three or more feet below grade. For site Hodny,J.W.,J.E.Whetzel and H.S.Anderson.2007,Vapor Intrusion Investigations and
<br /> assessment applications,the suggested exposure time for soil gas sampling is 10 to 14 Passive Sampling;Air&Waste Management Associations Proceedings,Vapor
<br /> days. Analytical instrumentation consists of gas chromatographs and mass selective Intrusion:Learning from the Challenges; September, 2007; Page 311-322.
<br /> detectors(e.g., EPA Methods T017/8260/8270 GC/MS),as well as automated thermal
<br /> desorption units. Sample preparation prior to analysis can be very simple and may Hodny,J.W.,J.E.Whetzel and H.S.Anderson.2006. Cobb, D.M.;The Use of Passive
<br /> involve cutting the tip off the bottom of the sampler and transferring an exposed sorber Samplers in Vapor Intrusion Investigations;AWMA Specialty Conference Vapor
<br /> to a thermal desorption tube. The replicate samples,if collected,are retained for Intrusion, Los Angeles,CA,September 13-15,2006.
<br /> approximately two weeks after initial analysis. When parallel studies were performed
<br /> comparing active and passive methods,the passive method was able to detect the ITRC,2007:Interstate Technical and Regulatory Council,"Vapor Intrusion Pathway:A
<br /> same VOCs,which were below the limit of detection of the active method and detect Practical Guideline,VI-1,Washington D.C.:Interstate Technology&Regulatory Council,
<br /> additional VOCs or SVOCs not detected by the active method(Environmental Vapor Intrusion Team,www.itrcweb.org; Pages 5-6;Appendix,D,Pages D-16 to D-17;
<br /> Technology Report,1998a and 1998b). Performance testing results of the more Appendix E,Pages E-2 and E-3;January,2007.
<br /> commonly used passive sampler types are described in the'following references: (1)
<br /> Environmental Technology Report, 1998a;(2) Environmental Technology Report, McAlary,T.A., P.Nicholson, H.Groenevelt,D.Bertrand.2009. A Case Study of Soil-
<br /> 1998b;and(3)Plantz,G.M.,2007. Gas Sampling in Silt and Clay-Rich(Low-Permeability)Soils,Ground Water Monitoring
<br /> &Remediation,29,no.1,Winter 2009, Pages 144-152
<br /> References: , Plantz,G.M.2007."Collection of Soil Gas on Adsorbents&Passive Samplers', USEPA
<br /> Soil Gas Sample Collection&Analysis Workshop,San Diego,CA,March 21-22,2007,
<br /> Cal/EPA,2005:California Environmental Protection Agency,Department of Toxic http://iavi.rti.org/attachments/WorkshopsAndConferences/06 Plantz Adsorbtive media
<br /> Substance Control,State of CaliforniaVapor Intrusion Guidance Document-Final Qdf
<br /> Interim.Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to
<br /> Indoor Air, Interim Final, Department of Toxic Substances Control, December 15,2004 USEPA,2008: U.S.Environmental Protection Agency, Beacon PSG Sampler in
<br /> (Revised February 7,2005),Page 10. "Brownfields Technology Primer:Vapor Intrusion Consideration for Redevelopment",
<br /> EPA 542-R-08-001,March 2008,p. 15.
<br /> CRC,2008:Chemical RubberCompany,BESURE Passive Soil Gas Sampler in"Field
<br /> Sampling Methods for Remedial Investigations",CRC Press,New York, Byrnes,M.E.p.
<br /> 120
<br /> Environmental Technology Verification Report, 1998a: Passive Soil Gas Sampling,W.L.
<br /> Gore&Associates;Inc.,GORE-SORBER®Screening Survey;Prepared by Tetra Tech,
<br /> San Diego,CA; Prepared for U.S.Environmental Protection Agency(EPA)Superfund
<br /> Innovation Technology Evaluation Program,Contract No.68-05-0037; EPA/600/R-
<br /> 98/095,August, 1998. Website:
<br /> httl2://www.epa.aov/ORD/SITE/reports/6OOr98O95/6OOr98095.pd
<br /> Environmental Technology Verification Report, 1998b:Soil Gas Sampling Technology
<br /> Quadrel Services Inc., EMFLUX Soil Gas System;Prepared by Tetra Tech,San Diego,
<br /> CA; Prepared for U.S. Environmental Protection Agency(EPA)Superfund Innovation
<br /> Technology Evaluation Program,Contract No.68-05-0037; EPA/600/R-98/095,August,
<br /> 1998. Website:http://www.er)a.gov/ORD/SITE/reports/600r98096/600r98096.pdf
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