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EV <br /> A <br /> E5,INC. <br />'E 269 MocntHernon Fd <br /> suile 101 <br /> I 5c-cn Valley.CA 950G6 <br /> (418148&7511 <br /> F'4X(40614,V-515 <br /> 2 October 1991 <br /> .Eris. Debbie }Farris • ,, _,,,:, u�i'cr�.Llii <br /> r.Iti]��1�4`sio <br /> Exxon Company, U.s.A. PRfI],1! E `JlES <br /> P.O. Box. 4415 <br /> Houston, Texas 77210-4415 <br /> SUBJECT: Vacuum Extraction System <br /> Exxon Station RS #7-1050, <br /> Stockton, California <br /> Dear Ms. Harris: <br /> The system was monitored on 12 September and 24 September 1991 at the <br /> subject site. The results are presented in the attached table for your <br /> review. Also enclosed are copies of the laboratory report. <br /> Although the extraction system has been operating at near peak <br /> capacity, well and air stream data indicates low TVH concentrations. A <br /> portable GC-FID will be used during the next monitoring event to verify <br /> TV concentrations of individual vapor points. We will contact you with <br /> the results in order to discuss possible new borings at the site. <br /> The system operated for 22 of the 25 days during the past interval, <br /> from 29 August to 24 September 1591. The system was down for three <br /> days due to mechanical difficulties. Between 8 March and 24 September <br /> 1491, approximately 1,321.1 pounds of hydrocarbons and 60 pounds of <br /> benzene have been removed from the soil. <br /> Please do not hesitate to call if you have any questions. <br /> Sincerely, <br /> EVAX Technologies, Inc. <br /> �hEt�i� �7A-�LCt12ct.irr.L <br /> - �5 <br /> Shaw Garakani <br /> Project Engineer <br /> cc: Mr. Harlin Knoll, San Joaquin County Environmental Health <br /> - - Department <br />