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,05/23/2001 08:01 2094671118 AGE STOCKTON M rH� °` <br /> ii <br /> U <br /> II Advanced � 1 <br /> GeoEnvironmental, Inc. <br /> F A C S I M I L E E <br /> To-, Mr.Michael Uufuma <br /> Of: PIIS-EHD <br /> Fax: 464-0138 <br /> II <br /> Pages. 3 <br /> Date: 23 May 2001 <br /> i I <br /> Iii Mike: <br /> I am sending you two diagrams to illustrate the problem I am facing at Langston's Market-As I said <br /> in our conversation yesterday,since AGE took over the monitoring rogram,ow ground water flow <br /> directions have been consistently towards the northwest;currently and apps rentlym the past)there <br /> is very little subsurface information in the northwest quadrant of the site and no MTBE data. A <br /> southeast to northwest MTBE-in-soil profile shows that about 20 mg/kg of MTBE was assessed I <br /> between 25 and 35 feet bsg in the former tank area,which is at the base of and below the level that it <br /> was excavated; I have no control on the extent of the MTBE-impacted soil towards the northwest. <br /> An iso-concentration map showing the lateral distribution of MTBE in ground water(data from last <br /> monitoring event) illustrates the problem even more acutely; assuming ground water is flowing <br /> consistently northwest,we don't know how far approximately 120 g/kg of MTBE in water would <br /> migrate towards the northwest. <br /> Le me know if you want me to make any changes in our work plan. Thanks. <br /> Calvtn Lee <br /> Project Geologist <br /> I <br /> ❑ ORIGINAL WILL NOT FOLLOW ❑ ORIGINAL WILL FOLLOW BY: !! <br /> R&GULAR MAIL ❑ <br /> CALIFORNIA OVERNIQHT ❑ <br /> If you have received fte fax in error,please contact FEDERAL EXPRESS ❑ <br /> us ixumediately at(209)467-1006. OTT-MR- ❑ <br /> Calvin F.Lee <br /> Advanced GeoAuviromwental,Inc. <br /> 837 Shaw Road,Stockton,California 95215 <br /> Phone:(209)467-1006•Fax:(209)467-1119 <br /> eloe�dvgeoenv.com <br />