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t <br /> Ij <br /> r �" �• 1 '1A f r..+. F - >-F b, ; ice. , <br /> ` CL EA'RWAT E <br /> r <br /> 1 G" .R`0-.'U P, fl N C._, <br /> R allow;no air leakage .around the'tubing'while measurements are being <br /> recorded. F i <br /> r r Flame`ionization detector (FID) samples'arecollected from the sample pont by. . � <br /> pumpingserthe air,sample out ythrough-tubing.into,a'Tediar bag.. The FID ,probe <br /> is .then inted int the bag for measurement of vapor 'concentrations + <br /> 4r. - The ineasuremerits are:repeated 'to confirm the readings`.;`The FID <br /> calibrated in accordance with procedures outlined in the=owner's"manual; we V <br /> Wil be pleased.-to send you;excerptsffiom it„regarding the calibration protocol,, <br /> if you wzsh. t { <br /> iri <br /> Flow rates'are”measure., gy, sertir g V and`sealing the elociCalc telescoping <br /> probe'irito'the-sample'port .Ag rrientioried.above, the VelociCalc Air Velocity :x <br /> f Meter-reports flow'rates uzthe standard-unif"O- scfm If;`.using equipment that <br /> k does not'convert;to scfm, the Volume and .the flow rate can be corrected.using' <br /> the Ideal Gas Law: <br /> PV—riRT. <br /> Paragraphs 8 and,9 h <br /> s _ S I.� f. .- f - � f S Y } •/ .j„T 'Z- 4 -0.r t <br /> I The work la '-ft v.�stall lon,of vapor, extraction wells`,VV11-4 and VW--5 was <br /> submitted to.the'PHS/EHD'on September 20; 1994. We received•approval,.of <br /> the work plan on,September 28 1994 On October 12, a'prlot test was P } <br /> condiicted utilizing''VW 4 and VW 5 : . <br /> After receiving the Authorityr to Construct-from the SJVUAPC•D Clearwater r, <br /> f <br /> installed the SVE system and.fbegan`operatibn iri early:February; 1995. <br /> A't your request;,-equipment`specif" "ons'for'.th6-system were'submitted to <br /> you:.as an attachhient to,Cle'arwater's'correspondence dated-February`28,,1995. . <br /> The system design,and egiziprnent' selection;was made`on-the basis of data <br /> provided'.I th6 Corrective Action Plan by,RESNA Indusiries,.Inc. Quly'6, '. <br /> ;r .e t <br /> ' ..1994 ' arid.'data� b a'' - { <br /> , o t aneci dural <br /> �. g our pilot vapor extraction test of vapor wells <br /> . `V.W,4.and, <br /> VW-5: z. ; <br /> The blower installed .on5ihe s stem'has a maxiriiurri ca aci Fof 200.scfm.. <br /> 'rY p ' ty i <br /> The system was designed to extract vaporsfrom only 2 or 3,wells ' ,. :i <br /> simtiltaneoizsly-(either.VW-41 and VWr5 together 'or V-W;1, VW='2,' and VW-3 <br /> :.> together) As we indicated in our work-plan, vapor wells VW=1;',VW-2;and "# <br /> ., . VW-3.were installed-in the."tank backfill area"where analytical data indicated: <br /> 4 relatively low:cariceritratiorts.of hydrocarbons in tYie'soil.;:In-addition,' we, -' <br /> -' wanted to be^able 'ta isolatethose three wells in',the forrrier tank field area i <br /> 1. .••,yl _ q. % _ { 1 '.. v 4 , ' <br />