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IS y <br /> Chevron Groundwater Monitonng Report(2Q2002) Page 2 of 2 <br /> Facility #9-2033—508 West Charter Way Stockton CA Date July 22,2002 <br /> DISCUSSION: <br /> Gettler-Ryan Inc performed this groundwater monitoring and sampling event for groundwater monitoring wells <br /> MW-1,MW-2 and MW-3 on May 31,2002 Each groundwater sample was analyzed for total petroleum <br /> hydrocarbons as gasoline(TPHg),benzene,toluene,ethyl benzene and xylenes(BTEX),and methyl tertiary butyl <br /> ether(MtBE) Groundwater from monitoring well MW-1 was also analyzed for total petroleum hydrocarbons as 1 �� <br /> diesel (TPHd),MtBE (confirmation) by,,Ethod 8260B,purgeable halocarbons by EPA Method 8021,semi- <br /> volatile organics by EPA Method 8270,'Totrecoverable petroleum hydrocarbons(TRPH)by EPA Method 418 1, <br /> and dissolved metals including cadmium,chromium,nickel,lead and zinc by EPA Method 6010B ,�ftP� <br /> The laboratory results for the sample collected from MW-I reported TPHd 460µg11,TPHg at 170µbenzene at <br /> 0 61 µg/1,and MtBE(confirmation)at 1,900 µg/1 No other target analytes in MW-1 were detected No target <br /> analytes were detected in samples from MW-2 Laboratory results for the sample collected from MW-3 detected <br /> TPHg at a concentration of 7,400µg11,and benzene at a concentration of 470µg/1�(o�4,*' 3��1G I 7 �L G q4 t � <br /> b 4 <br /> Groundwater elevations generally increased across the site approximately 0 07 ft when com. arecP0ith tl e previous 7� J <br /> monitoring event Groundwater flow was to the east at 0 006 ft/ft <br /> LIMITATIONS: <br /> The findings presented in this letter are based on data and interpretations provided by Gettler-Ryan,Inc Gettler- <br /> Ryan's report is attached The data presented in this summary is accurate only to the degree implied by the sources <br /> and methods used No warranty,expressed or implied, is made by SECOR <br /> If you have any questions,please feel free to call us at(916) 861-0400 <br /> Sincerely, <br /> SECOR Inte ional Inc <br /> o able <br /> enior Geologist <br /> ATTACHMENTS: <br /> • Attachment A—.Tune 27,2002 Groundwater Monitoring&Sampling Report by Gettler-Ryan Inc <br /> cc Bob Cochran,Chevron Products Company,P O Box 6004, San Ramon,CA 94583-0804 <br /> Marty Hartzell,RWQCB--CVR,3443 Routier Road,Suite A, Sacramento,CA 95827 <br /> Pearl Myer <br />