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i <br /> VAPOR EXTRACTION TEST (VET) SPECIFICATIONS <br /> for <br /> FORMER TEXACO SERVICE STATION <br /> 3.05 SOUTH HUTCHINS STREET <br /> LODI, CALIFORNIA. <br /> i (Page 1 of 2) <br />� "1"E�upment>Description <br />�. The extraction unit shall consist of`aregenerative blower equipped with an ecplosion:proof motor <br /> enclosure that satisfies the 04941,Vivisio'rt 1 &2 requirements of the Nat anal Electric Code. The <br /> blower shallbe capable of generating a:minimum of 30 standard cubic eet perl.minute (sdin) at a <br /> vacuum of 55 inches::of water column. The effluent from the blower shall be routed through two <br /> (2)200-pound granular activated carbon.units. The process i''in shall be.ccsn.f.1gured and ui ed. <br /> f p P+ g P �Pp <br /> such that the data collection protocols outlined below are met. The VET system shall be portable <br /> and fully sel£contained with.-rd <br /> g to electrical power. <br /> YET.Test Procedures` <br /> 1 Measure and record the distancel from the top-of-casing to the bottom of each vapor <br /> extraction well. Measure the depth to.groundwater (if any), <br /> 2; Install 0",-1"water column pre-calibrated MagnahelicTM gauges onto W-1,MW-3 and VW- <br /> 4. If the observed vacuum during the test exceeds 1" of water column, the 0" 1" <br /> Magnahelic'gauge shall be replaced with a 1" - 10""MagnaheliJ'gauge: <br /> 3. Record pre-extraction vacuum readings (if any)• <br /> ., 00nnect 2-inch diameter piping from VW-2 to the blower intake: <br /> 54 Initiate extraction from VW 2 at a flowrate of 30 actual cubic feet per minute (acfm).. <br /> Flowrate measurement shall be accomplished using a bwyer I)5-200 flow sensor. <br /> 6. Measure and record extraction well flowrate,process flew ternperature,vacuum;and oxygen <br /> and carbon dioxide:contents (in percent) every 15 minutes.. <br /> F <br /> 7. pleasure and record vacuum response at VW-1,,,MW,3 and:VW4 every 15 minutes:. <br /> S. At the end of the first 15 ip utes of extraction, collect a'1 liter vapor sample into a tedlar <br /> bag from thegrace>s line tcveen VW.2 and the blower. t <br /> , iantinue extraction from -2 at 30 acfm for three (3) hours-collecting data specified in <br /> Steps 6 and 7, <br />