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I <br /> II k� <br /> TRS DDDDDD <br /> AUG 12 2004 <br /> August 9, 2004 ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> Mr. Paul Supple 02130 <br /> Atlantic Richfield Company 06.x2 <br /> P.O. Box 6549 <br /> Moraga, California 94570 <br /> Re: Quarterly Groundwater Monitoring Report <br /> Second Quarter 2004, for ARCO Service Station No. 02130 <br /> Located at 7906 North El Dorado Street, Stockton, California <br /> Dear Mr. Supple: <br /> URS Corporation Americas (URS) is submitting the attached report, which presents the results of the <br /> second quarter 2004 groundwater monitoring and sampling program at Atlantic Richfield Company <br /> (ARCO — a BP affiliated company) Service Station No. 2130, located at 7906 North EI Dorado Street in <br /> Stockton, California. <br /> Please be advised that in our continued effort to remediate the impacted groundwater at the site, URS <br /> has moved the air bubbling device to well VW-10. Well VW-10 is the most impacted well at the site and <br /> URS hopes that bubbling air into this well will aid in the natural bio-attenuation of the petroleum in this <br /> area. The bubbling device was moved to well VW-10 on April 8, 2004. <br /> URS requests that the San Joaquin County Environmental Health Department re-evaluate the <br /> need for quarterly methanol analysis. Methanol is not used as an oxygenate in gasoline at this time <br /> and thus not needed to assess if a new release has occurred at a site. <br /> If you have any questions regarding this report, please call Mr. Vernon Elartb at (916) 679-2299. <br /> Sincerely, <br /> D G <br /> URS Corporatio Americas \��oR FAUZ Fold <br /> No, 2x <br /> Exp, l 3! 006 <br /> Margaret Hogaboom Vernon Elarth, R.G. tfX �P <br /> Staff Geologist Project Manager '9TF OQ� <br /> �F CAIJ <br /> Attachment: Quarterly Groundwater Monitoring Report, Second Quarter 2004 <br /> cc: Mr. James Barton, Regional Water Quality Control Board, Central Valley Region <br /> Mr. Mike Infuma, San Joaquin County Environmental Health Department <br /> Project File <br /> URS Corporation <br /> Crown Corporate Center <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento, CA 95833 <br /> Tel: 916.679.2000 <br /> Fax: 916.679.2900 K\Wproce V5 BP ARCOrB2MQuwff1yV QTR MV13D COVER 2QD4.doc <br />