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bp <br /> ��� ��1 <br /> Iii ��� <br /> Scott T. Hooton BP Oil Company <br /> Portfolio Manager r•<« rt r t, ry Midwest Environmental Services <br /> 8 �,i;,, _ : s. 2' <br /> 295 SW 41"Street <br /> Bldg.13,Suite N <br /> Renton,WA 98055 <br /> Switchboard:425/251-0667 <br /> Central Fax:425/251-0136 <br /> February 27, 2001 <br /> Mr. Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> PO Box 388 <br /> Stockton, CA 95201-0388 <br /> RE: BP Oil Site No. 11192 <br /> 1403 Country Club Blvd. <br /> Direct:425/251-0689 Stockton, CA 95204 <br /> Cell:206/919-5029 <br /> hootonst@bp.com Dear Mr. Infurna: <br /> www.bp.com <br /> This letter transmits the First Quarter 2001 Groundwater Monitoring report prepared on behalf of BP <br /> by Blaine Tech Services. <br /> The enclosed report summarizes chemical data and groundwater elevation measurements collected <br /> from seven wells, beginning during May, 1990. Upon review of the results,you will note that <br /> aromatic petroleum hydrocarbons were detected in samples obtained from four of the wells sampled <br /> on 16 January 2001. The highest benzene concentration (14.4µg/1) is associated with a sample <br /> obtained from well MW-3. <br /> MTBE was also detected in samples obtained from all of the wells sampled on 26 October 2000. <br /> Concentration data and water elevation measurements for the three wells with the highest MTBE <br /> concentrations associated with the first quarter 2001 are depicted below. <br /> MW-3 TPHg, MTBE&Water Elevation <br /> 140000 0 <br /> 120000 <br /> 5 <br /> 100000 <br /> � ... � � <br /> E (€, .` <br /> 80000 _ a _ � E.t--10 M... TPHg <br /> Ct€' J <br /> w —o—NrrBE <br /> 60000 -15 <br /> Water Devation <br /> 40000 E E <br /> �E E -, 8/1/94:Tosco <br /> 20000 ` ( �IrEI�=� "`` ��r``• - acquired legal <br /> interestin <br /> underground <br /> 0 -25 <br /> CI NN M v Ln co 00 0') o storage tanks, <br /> rn rn o piping and <br /> N improvements. <br /> ` 2' L'2N C'4 <br /> N N <br /> LO M N <br /> r 63 izz 4 4 N R <br />