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appears to be centered at well BM-3 as it has been in the past, since July 1998 We have <br /> had the tanks and piping of the tanks checked and there were no leaks found <br /> f <br /> Dissolved oxygen levels were recorded this quarter at this site The levels were <br /> measured with a calibrated YSI model 51 B meter by placing the sensor 5 feet below the 'a <br /> surface of the water table after the bailing of the wells The measured levels are shown <br /> on Table 3A and showed in Figure 5 <br /> k131. d <br /> VAPOR EXTRACTION SYSTEM <br /> This site has been under remediation since July 1997 A total of 46,371 pounds of <br /> tgasoline has been removed since the beginning of this project This system was not <br /> operating most of this quarter because of equipment problems See Table 5 <br />' Conclusions <br /> We will continue to monitor this site The next monitoring event will take place in April <br />' 2002 <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, where as BM-6 and BM-8 <br /> are deep wells and samples are taken from water, which is below 45 feet <br /> Yours truly, <br /> SERE a1`� <br />' John Cussen ; <br /> RG #6506 <br /> Enclosures <br />' 8 Tables <br /> 5 Figures <br /> 2 Laboratory Reports and Chain of Custody's <br />' 13 Sample Sheets <br /> cc Mr Roger Liston, Darpetro, Inc <br />' M r G L Boggs, RWQCB <br /> 2 <br /> i <br />