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25 March 1998 - r <br /> AGE-NC Project No. 98-0428 <br /> Page 2.of 2 <br /> formulations that is frequently the first compound detect�d in the leading edge of a migrating plume, <br /> originating'from a UST release.,The detected MTBE atlihe site could be attributed to several origins, <br /> including: <br /> • A release from one or more,USTs;or, <br /> • A surface spill.of gasoline. : <br /> AGE believes the latter case to be the more likelyscenario as MTBE was not detected in the deeper <br /> ' soil sample B 1-25,suggesting a small surface spill;however it is not possible tis entirely rule out the <br /> former scenario on the available:data. <br /> As the UST's are slated for removal, AGE recommends waiting until'the-USTs have been removed <br /> to determine whether or not further assessment is justifie or necessary.AGE recommends no further._ <br /> site investigation:at this time. <br /> Laboratory reports of soil analyses,-testing-methods, laboratory qua]ity'assurahce/quality control_. <br /> (QA/QC) reports, and sample chain of custody'docum ntation are included. <br /> The opportunityto provide this service is greatly ap' r elated If You have any question or require <br /> further information, please contact ouT office gat (209) 67-1006: <br /> --Sincerely;: <br /> Advahced GeoEnvironnnental, Inc. P <br /> William Little <br /> -Staff Geologist <br /> Enclosures <br /> cc. Mr. Kent Fyffe.- Bank of Stockton <br /> Mr. Harlin Knoll -PHS - EHD <br /> Advanced GeoEnvironmental,Inc. <br /> i <br />