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• <br />• <br />�,ucvvu r.wu�u 4vuiNiwy Page 5 <br />Former Chevron Service Station #9-5775, 301 West Kettleman Lane, Lodi, California January 11, 2002 <br />CONSTITUENT <br />ESTIMATED <br />MASS REMOVED.:: ,MAs9,iREMA1N&G <br />-PERCENTAGE{ <br />�, w _ E.� <br />�` IiA1E(lbs)--0"� GRQUNDWATER <br />HPDR. CAk$O1�I' <br />TO'DATE'(1bS} -4`" <br />r aIN SOIi�;(1hs} 4- <br />REMOVED° <br />, <br />r ` <br />MASS .lbs , <br />( } <br />QUARTER 2001r <br />.. <br />QUARTER=2001 <br />, <br />Gasoline <br />1,450 <br />4,095.3 <br />-2,645.3 <br />282 <br />Hydrocarbons <br />Gasoline <br />55 <br />Benzene <br />370 <br />85.3 <br />254.7 <br />23 <br />MtBE <br />67 <br />443.8 <br />-376.8 <br />662 <br />The difference between the estimated hydrocarbon mass and amount removed could be <br />attributable to isolated areas within the assessment area that contain higher contaminant <br />concentrations than previously identified. <br />3.3.2 Estimated Mass of Hydrocarbons Dissolved in Groundwater <br />The results presented below are based on the calculation presented within the PAR/FRP <br />Addendum and cumulative 4`h quarter 2001 GWE mass removal data. This information is <br />summarized in the following table: <br />CONSTITUENT <br />ESTIM TED : ;MASS REMOVED TO 'MASS REMAINING�IN, �P :kctf TAdky <br />HYDROCARBONMASS <br />�, w _ E.� <br />�` IiA1E(lbs)--0"� GRQUNDWATER <br />ti <br />REMOVED <br />(lb's)-JUi Y24, 2000 <br />QUnIiTER2001 Y ; (lbs)=4Tx,QUaRTER- <br />, <br />r ` <br />a <br />•, �' 4 k�� 2001 <br />, <br />_ <br />� <br />„� � <br />� � <br />Gasoline <br />55 <br />7.37 47.63 <br />13 <br />Hydrocarbons <br />Benzene <br />42 <br />0.153 41.85 <br />0.3 <br />MtBE <br />137 <br />81.62 55.38 <br />60 <br />4.0 SITE CONCEPTUAL MODEL <br />A Site Conceptual Model (SCM) has been developed to illustrate likely sources, pathways, <br />and receptors. Results of the SCM are summarized below and graphically presented on <br />Figure 10. <br />JAChevron1957751Periodic MonitoringlQuarterly Progress Reportsl4thQuarter 200114th Quarter -2001 Progress Report.doc <br />e <br />