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Deployment depths,deployment durations and analytical procedures will depend on the GORE TM 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.;v^•^v gore coml=_urvevs.
<br /> typical soil gas sampling installation,a slam bar or electric rotary hammer-drill is used to Hodn J.W.,J.E.Whetzel and H.S.Anderson.2007,Vapor Intrusion Investigations and
<br /> auger a 3/4 to 1-inch diameter hole to depth of three or more feet below grade. For site v
<br /> assessment applications,the suggested exposure time for soil gas sampling is 10 to 14 Passive Sampling;Air&Waste Management Associations Proceedings,Vapor
<br /> Intrusion:Learning from the Challenges;September,2007;Page 311-322.
<br /> days. Analytical instrumentation consists of gas chromatographs and mass selective
<br /> detectors(e.g.,EPA Methods T01 7/8260/8270 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.Wheusi and H.S.Anderson.MAS Cobb, D.M.;The -Vapor Passive
<br /> involve cutting the lip off the bottom of the sampler and transferring an exposed sorter Samplers in Vapor Intrusion Investigations;AWMA Specialty Conference—Vapor
<br /> Intrusion,Los Angeles,CA,September 13-15,2006.
<br /> to a thermal desorption tube. The replicate samples,if collected,are retained for,
<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.ora; Pages 5-6;Appendix D, Pages D-16 to 13-17;
<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, as a m T.A.,P.Nicholson.andClay-Rich
<br /> - ich(Lo vele D. Bertrand.Soils,
<br /> G A Case Study of Soil-
<br /> 1998b;and(3)Plantz,G.M.,2007. Gas Sampling in Silt and Clay-Rich(Law-Permeability)Soils,Ground Water Monitoring
<br /> &Remediation,29,no.1,Winter 2009,Pages 144-152.
<br /> Plantz,G.M.2007."Collection of Soil Gas on Adsorbents& Passive Samplers",USEPA
<br /> References: - Soil Gas Sample Collection&Analysis Workshop.San Diego,CA.March 21-22,2007,
<br /> CaIIEPA,2005:California Environmental Protection Agency,Department of Toxic tit ,l/iali rli oro(g([achmen[s/WorkshoosAndConferencesl06 Plantz Adsorbtive media.
<br /> Substance Control,State of California.Vapor Intrusion Guidance Document—Final PSL
<br /> Interim.Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to USEPA,2008:U.S. Environmental Protection Agency,Beacon PSG Sampler in
<br /> Indoor Air,Interim Final,Department of Toxic Substances Control,December 15,2004 "Brownfields Technology Primer.Vapor Intrusion Consideration for Redevelopment",
<br /> (Revised February 7,2005), Page 10: EPA 542-R-08-001, March 2008,p.15.
<br /> CRC,2008:Chemical Rubber Company,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/600IR-
<br /> 98/095,August, 1998. Website:
<br /> hup//www eoa oov/ORD/SITE/reoortsl600r98095/600r98095.odf
<br /> Environmental Technology Verification Report, 1998b:Soil Gas Sampling Technology
<br /> Quadrat 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:htto�// 2^v eoa aovlQRD/SITE/reports/600r980961600r98096.Ddf
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