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Ms. Marla Guensler <br /> Exxon Company, U.S.A. <br /> January 4, 1994 <br /> Page 2 <br /> the exception of 1 microgram per liter of benzene in MW-5. The concentration of benzene in the <br /> ground water sample collected from monitoring well MW-5 has decreased since the previous <br /> sampling event in September 1993. A dissolved benzene concentration map based on analytical <br /> results for ground water samples collected on November 18, 1993, is included as Figure 4. Copies <br /> of the laboratory analytical reports are presented in Enclosure B. <br /> Future Work <br /> The next quarterly monitoring event for this site is scheduled for February 1994. <br /> R rear i n tures <br /> The interpretations contained in this report represent our professional opinions, and.are based in part, <br /> on information supplied by the client. These opinions are based on currently available information <br /> and are arrived at in accordance with currently accepted hydrogeologic and engineering practices at <br /> this time and location. Other than this, no warranty is implied or intended. <br /> Delta recommends that copies of this report be forwarded to: <br /> • Mr. Mike infurna Ms. Elizabeth Thayer <br /> Environmental Management Division California Regional Water Quality Control Board, <br /> Public Health Services Central Valley Region <br /> San Joaquin County 3443 Routier Road <br /> Post Office Box 2009 Sacramento, California 95827-3098 <br /> Stockton, California 95201 <br /> Sincerely;- <br /> DELTA <br /> incerely;DELTA ENVIRONMENTAL CONSULTANTS, INC. <br /> Paul V. Zianno ��p�ED GAO <br /> Project Hydrogeologist �`� S R. BR rp <br /> * No.5078 <br /> FnP 4 ibf-r <br /> rJame.sBrownell, R.G.Registered-Geologist No. 5078 -9r� . 0CAL1� <br /> PVZ (LRP307.TA) <br /> 1Ja Enclosures <br />