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r <br /> , r <br /> r <br /> 15 April 1995 s <br /> AGE-NC Project No 95-0121 <br /> Page 5 of 9 - <br /> three to four weeks <br /> three times per,week The anticipated start-up period be'appromately <br /> w <br /> 32 IN--SITU AIR SPARGING SYSTEM <br /> and soil vapor extraction (SV-) <br /> be conducted concurrently <br /> , <br /> AGE proposes irr-situ air sparging(,AS <br /> • ed IAS system )will consist of a blower to sn}ect air beneath the water table an <br /> at the site The propos <br /> 15 air sparging points of to each <br /> - - re blower will provide between 3 and 10 pounds per square inch (psi) air , <br /> A low pressure <br /> injected air will volatilize dissolved hydrocarbons byround ,%vater5 and� S� system Dice <br /> sparging point The in} where they care be withdrawn y <br /> hydrocarbon vapors into the vadose zone, <br /> where <br /> A11Z SPARGING�'�ELL INSTALLATION <br />` 3 2 l (DPT) Each well will <br /> to install fifteen(15) IAS wells using direct push quipped <br /> technology 2-inch diameter,probe <br /> AGE Proposes <br /> locations aepdepicted in Figure 7 - Spcirg,iig We{{Locatioi:s <br /> be installed using AGES van-mounted <br /> ed Geoprobe probing unit equip <br /> rods Approximate sparging pointrods will = <br /> robe <br /> depth of approximately 36 fele s using P small <br /> Each sparging points will be advanced to a dep Pp <br /> be cleaned pnor to advancement in each borehole <br /> ole Pruob on di grains a epincluded as Figures at seal will <br /> (0 75-inch) PVC casing Proposed IAS point <br /> will be sealed to the surface with <br /> Wg{I Des A#12fine-grained sand will be used as a filter pack and a three <br /> SpargriIg s Each sparging p <br /> be emplaced using En"roplug hentoiute chip <br /> Portland cement Y <br /> h <br /> 3 2 2 SYSTEM LOCATION AND DESIGN <br /> ower from the <br /> with the stem,hence the blower will draw power wells <br /> The blower unit will be nch d assInula Beate PVC pip will carry air from the blower to t ed paring system <br /> SVE system A one plan of the prop ` <br /> The PVC piping will be installed beneath VC Prier g System <br /> ground rface A p <br /> is depicted in Figure 5 -Proposed PIP <br /> 1119 <br /> 2 3 MONITORING <br /> tone and sampling should continue throughout the r�d9atmanthlyoto <br /> Quarterly ground water rrianr g l through <br /> However, we recommend monitoring ground water wells MW- <br /> din or lateral spreading of hydrocarbons is occurring as a resuEt of <br /> determine if ground water mounding <br />