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REC E WED <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 U <br /> Second Quarter 2004, for ARCO Service Station No. 02130 <br /> Located at 7906 North EI 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 El 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 V W-10. Well VW-10 is themost 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 S, 2004. <br /> URS requests that the San Joaquin County Environmental Health DepLin <br /> nt re-evaluate the <br /> need for quarterly methanol analysis. Methanol is not used as an oxygenaasoline 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 Elarth at (916) 679-2299. <br /> Sincerely, <br /> fp�OC <br /> URS Corporatio Americas C>\c'��yt PDUi <br /> 2r" I <br /> No. 7 20 <br /> Exp. 13f O� <br /> Margaret Hogaboom Vernon Elarth, R.G. <br /> Staff Geologist Project Manager OF CAJ'W <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 Infurna, San Joaquin County Environmental Health Department <br /> Project File - <br /> URS corporaunn <br /> crown corporate center SAN JOAQUIN COUNTY <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento, U 95833 ENVIRONMENTAL HEALTH DEPARMW <br /> Tel: 916.679.2000 304 E WEBE ,AV <br /> Fax: 916.679.2900 STOCKTON v[a x�aao= <br /> a� ann <br /> (209) 488.3420 <br /> Approved <br /> / ] Approved with changes: See Rsrftft <br /> :7 Disapproved: See Remarks <br /> zemarks <br /> Date Btt <br /> Approal extends 0* b thatrich orrrr and daaoNtl <br /> hereon and does not authorize or a arty orrllMim W <br /> 1�rvii.T?ier rrom v=nuirements of state laws ork" ardM1mm <br />