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11U: MEAL711 <br /> ST�f 7(1-5 Al r f, ICE <br /> ENVIRONMENTAL ING 3330 Cameron Park Drive Ste 550 <br /> �P �3 � �� O.ameron Park California 95682 <br /> 30)676-6004-Fax (530)676.6005 <br /> April 15, 2004 <br /> Project No U6100-14-4 <br /> Mr Nuel Henderson, R G <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Quarterly Groundwater Monitoring Report, First Quarter 2004, for ARCO Service <br /> Station No 6100, Located at 25775 Patterson Pass Road, Tracy, California <br /> Dear Mr Henderson <br /> Stratus Environmental, Inc (Stratus), on behalf of Atlantic Richfield Company (ARCO — a BP <br /> affiliated Company), is submitting the attached report which presents the results of the first <br /> quarter 2004 groundwater monitoring and sampling program at ARCO Service Station No 6100, <br /> located at 25775 Patterson Pass Road, Tracy, California (Figure 1) In addition, this report also <br /> presents the summary of performance evaluation of the two soil vapor extraction (SVE) systems <br /> that began operation beginning first quarter 2004 The quarterly monitoring program is in <br /> compliance with San Joaquin County Environmental Health Department (SJCEHD) <br /> requirements regarding underground storage tank (UST) investigations <br /> If you have any questions regarding this report, please contact Jay Johnson at (530) 676-6000 <br /> Sincerely, <br /> 5T1ZATU5 E YMONMENTAL, INC <br /> a 4an on, R GG wri S Kowtha, P Emor Engineer ager <br /> Attachment Quarterly Groundwater Monitoring Report, First Quarter 2004 <br /> cc Mr Paul Supple, ARCO/BP <br /> Mr Jim Barton, California Regional Water Quality Control Board <br /> Mr Craig Mitchell, San Joaquin Valley Air Pollution Control District <br /> The Robert and Cleo Vierra Family Trust <br /> Mr Vern Elarth, URS Corporation Americas <br /> P 1Bp-Arco for UR5161MQuarterly1200AArco_6I00_1Q04 doe 5TRAW5 <br />