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i <br /> VRM <br /> 1' jtj I 4, r1 A <br /> 040 <br /> RE <br /> October 27, 2004 NOV 0 1 1004 <br /> E"f&A' AE-'Nd OLIN <br /> PERlVsUMVVIC S <br /> Mr Paul Supple 2186 f <br /> Atlantic Richfield Company 06 a2 ��. co <br /> P O Box 6549 4 j� S <br /> Moraga, California 94570 �j 61 �_ <br /> � � � <br /> Re: Quarterly Groundwater Monitoring Report � ��} L�LV)Third Quarter 2004,for ARCO Service Station No.2186 <br /> Located at 3212 North California Street,Stockton, California <br /> Dear Mr Supple <br /> URS Corporation Americas {URS} is subnutting the attached report, which presents the results of the <br /> third quarter 2004 groundwater monitoring and sampling event at Atlantic Richfield Company (ARCO— <br /> a BP affiliated company) Service Station No 2186, located at 3212 North California Street in Stockton, <br /> California <br /> Please be advised that a Soil Vapor Extraction System has been installed at the site to remediate <br /> petroleum-impacted soils and reduce groundwater concentrations The system was started on August 30, <br /> 2004, however, is currently off due to a noise complaint from a neighbor URS is currently installing a <br /> sound enclosure to reduce noise levels <br /> URS requests that methanol be removed from the analyte list.Methanol is not used in the gasoline <br /> at the site and thus not a chemical of potential concerti. <br /> Methanol was detected in one site well during the second quarter 2004, in well MW-4 at 590 µg/L, <br /> however, this was likely a false positive as proven by the fact that it was not present during this most <br /> recent event and it is not used at the site <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 1Wprocess'i5 BP ARC01021861Quanerly12004\3 QTR 0412186 COVER 3Q04 doc <br />