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�., Ms. Victoria McCartney S E C O R <br /> June 10, 2005 <br /> Page 2 <br /> �- BATCH GROUNDWATER EXTRACTION WORK <br /> Batch groundwater extractions are presented in the following paragraphs listed in order of <br /> �. date extracted. <br /> A v5v5+, SEPTEMBER AND OCTOBER, 2004 <br /> On August 31, September 7 and 28, and October 5, 12, 19 and 26, 2004, Integrated <br /> Wastestream Management (IWM), under the supervision of SECOR, extracted <br /> approximately 12,550 gallons of groundwater from wells MW-6S and MW-8 (Figure 2) using <br /> a submersible pump at a pumping rate of approximately five gallons per minute (gpm). <br /> Based on the data collected during this event, approximately 0.94, pound of dissolved <br /> �., methyl tertiary butyl ether (MtBE) was removed from the groundwater. As of October 26, <br /> 2004, approximately 2.01 cumulative pounds of dissolved MtBE has been removed from <br /> the groundwater. <br /> Extracted groundwater analytical data and MtBE mass removal estimates for this period are <br /> presented in Tables 1 and 2, respectively. Certified analytical reports and chain-of-custody <br /> documentation are included in Attachment 2. Field data sheets for the batch extraction <br /> events are included in Attachment 3. <br /> �. a <br /> NOVEMBER AND DECEMBER, 2004 �A 1) <br /> On November 2, 9, 16, 23 and 30, and December 7, 14 21 and 28, 2004, IWM, under the <br /> v supervision of SECOR, extracted approximately 20,20 gallons of groundwater from wells <br /> MW-6S and MW-8 (Figure 2) using a submersible pump at a pumping rate of approximately <br /> five gpm. Based on the data collected during this event, approximately 0.7 pound of <br /> L- dissolved MtBE was removed from the groundwater. As of December 28, 2004 <br /> approximately 2.69 cumulative pounds of dissolved MtBE has been removed from the <br /> groundwater. <br /> LW <br /> Extracted groundwater analytical data and MtBE mass removal estimates are presented in <br /> Tables 1 and 2 respectively. Certified analytical reports and chain-of-custody <br /> documentation are included in Attachment 2. Field data sheets for the batch extraction <br /> events are included in Attachment 3. <br /> �- JANUARY AND FEBRUARY, 2005 <br /> On January 4, 11, 18, and 25, and February 1, 8, 15 and 22, 2005, IWM, under the <br /> supervision of SECOR, extracted approximately 22,300 gallons of groundwater from wells <br /> MW-6S and MW-8 (Figure 2) using a submersible pump at a pumping rate of ipoximately <br /> five gpm. Based on the data collected during this event, approximately A pound of <br /> dissolved MtBE was removed from the groundwater. As of February 22, 2005 <br /> 1AChevron19I 4521REPORTMatch Extractionlbatch groundwater extraction report.doc <br />