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' MtBE was detected in wells BM-1 , BM-3, BM-4, BM-5, BM-7 and BM-9 TBA tertiary <br /> Butanol was found in wells BM-3 and BM-9 The presence of MtBE is an indication that it <br /> is migrating to this site from the Stations to the west of us <br /> Dissolved oxygen levels were not recorded this quarter <br /> As requested in the EHD letter dated January 10, 2000, a plot of the wells and the old and <br /> new piping runs of the dispenser lines is shown in Figure 6 <br /> VAPOR EXTRACTION SYSTEM <br /> This site has been under remediation since July 1997 A total of 44,253 pounds of <br /> gasoline has been removed since the beginning of this project <br />' Conclusions <br /> We will continue to monitor this site The next monitoring event will take place in April <br />' 2001 <br /> We request that wells BM-6 and BM-8 no longer be sampled during the quarterly <br />' monitoring These wells are located next to wells BM-2 and BM-13, which are shallow <br /> wells where the water is sampled from the surface to 45 feet, and BM-6 and BM-8 are <br /> deep wells and samples are taken from water, which is below 45 feet <br /> Yours truly, <br /> S,��R�D <br /> - Jo n Cussen c���aN cUss� <br /> RG #6506 <br /> - Enclosures <br /> 7 Tables <br /> 6 Figures or cr�.�o <br /> 2 Laboratory Reports and Chain of Custody's <br /> 13 Sample Sheets <br /> cc Mr Roger Liston, Darpetro, Inc <br /> Mr G L Boggs, RWQCB <br />