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<br /> 4.3, METHOD OF CLEANUP PROPOSED OR PYIPLEMENTED TO DATE
<br /> In Junef 1990,E three gasoline tanks'(6,000 ilgallon, 8,000 gallon and 10,000 gallon) and an ,
<br /> underground waste,oil tank (500 gallon) were removed from the property, by the Seibold a
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<br /> Corporation No additional cleanup has been implemented to date
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<br /> i The cleanup of the!site will be developed in two phases (soil and groundwater) The initial , lilI I
<br /> phase of the program will address soil remediation The soil remediation program will';
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<br /> I I include,,design3�;and,;installation of a vapor extraction„system ' The, next phase;;,of;the
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<br /> ;,remediation program,will address groundwater remediation (if necessary) „,I „,,„r ll ,
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<br />' The initial phase of the cleanup will likely include the following I
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<br /> 1. Removal of the remIaining piping associated with the removed tanks
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<br /> 21. Installation of a vapor extraction trench or equivalent,
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<br /> 3. Backfilling the tank excavation, I
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<br /> 4. 'Installation of a vapor extraction well, and
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<br /> The„remaining;piping associated with the'removed tanks will be removed from the`site ' €
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<br /> " After SJCPHS's approvaFto backfill the excavation°in view of ldad concentrations...... the tank
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<br /> exwillIbe backfilled Before the excavation is backfilled, a vapor,extraction'trench
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<br /> Ilor, equivalent 1will,be-installed in the bottom of the tank excavation. After the;trench,uhas u I ,, I'
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<br /> ' I,been install#ed`,'the excavation will be backfilled, tfien'a vapor extraction well will be installed
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<br /> in the tank area ' The well will be installed according to applicable state and county
<br /> I requiremen , ,,lts 1''The wpiping
<br /> PP gell will be constructed of 2-inch diameter schedule 40 PVC
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<br /> During,the ins,talla,tions of the vapor extraction well, soil samples will be collected every,,five '
<br /> feet.°€'Soil sampled,will,be logged according to the Unified Soil Classification System The
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<br /> Q 91CO238WMMARTQR'292 178-06-92 14-2
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