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<br />,to be installed either on site or in'public. access areas after permissFon is granted Ifr'om lithe
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<br />appropriate state and local agencies I I r ' ` ' I i, ;, ,jl , , I ,I '
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<br />1, iii 4.3 METHOD OF CLEANUP PROPOSED OR IMPLEMENTED TO DA` lI ,
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<br />„q In June 1990, three gasoline tanks (6,000 gallon, 8,000 ,gallon,, and, 10,000 gallon), and an
<br />'underground waste oil tank (500 gallon) were removed from the property by the Seibold
<br />Corporation No additional cleanup has been implemented to 'date. ' I
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<br />,(The cleanup of the site will be developed in two phases '(soil and groundwater) The initial
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<br />;;;" �' ' R; ,phase of the program will address soil remediation';''The,,soil'"remediation"program will
<br />include design and installation of a vapor extraction system ' The next phase of the ' I
<br />remediation program will address groundwater remediation (if necessary)
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<br />The initial phase of the cleanup wil,l likely ', include the' following
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<br />1 1. Removal of the remaining piping associated with the removed tanks,
<br />I' I 1 2 Installation of a vapor 'extraction trench or equivalent,
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<br />3. Backfilling -the, j
<br />e�tank excavation
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<br />' 4., Installation of avapor extraction well;and,
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<br />5i l 'Installation of a vapor extraction system
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<br />Tlie'remaining piping, associatled with'the,;removed ,tanks will be removed from the site
<br />' After SJCPHS's; approval to backfill the excavation in view of lead concentrations, the tank
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<br />u excavation will be backfilled:' 'Before the,excavation is backfilled, a vapor extraction trench ,
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<br />or' equivalent' will be installed in the bottom of, the tank (excavation After the trench has
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<br />been,linsytalled, the excavation will be badI; then a vapor extraction well will be installed
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<br />in the 'tank area ' ' The, well will I, be ' installed according to applicable state and county
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<br />requirements" " The well wilf lie constructed of 2 -inch diameter schedule 40 PVC piping I'
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<br />During the installation'of the vapor,extrachon well , soil, samples will be collected every five
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