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A (� <br /> Chevron Groundwater Monitoring Report(I Q2001) Page 2 of 2 <br /> Facility 49-2033—508 West Charter Way,Stockton CA Date April 18,2001 <br /> . DISCUSSION: <br /> Gettler-Ryan Inc performed this groundwater monitoring and sampling event on February 15,2001 Sequoia <br /> Analytical of Walnut Creek, California performed laboratory analysts of groundwater samples Each groundwater <br /> sample was analyzed for total petroleum hydrocarbons(TPH), benzene,toluene,ethyl benzene and xylenes <br /> (BTEX),and methyl tertiary butyl ether(MtBE) Groundwater from monitoring well (MW)-1 was also analyzed for <br /> semi-volatile organics by EPA Method 8270,total recoverable petroleum hydrocarbons(TRPH)by American <br /> Public Health Association(APHA) Methods and five metals by EPA Method 200 <br /> Laboratory results report the groundwater sample from MW-I contained TPH as diesel(TPHd)at a concentration of <br /> 280 ppb,and MtBE at a concentration of 700 ppb Zinc was reported at 18 3 ppb Analysis of water from MW-2 <br /> detected no target analytes Laboratory results report the groundwater sample from MW-3 contained total <br /> petroleum hydrocarbons as gasoline(TPHg)at a concentration of 5,660 ppb, benzene at 310 ppb, and MtBE at 22 6 <br /> ppb <br /> Groundwater elevattons generally decreased across the site when compared with the previous monitoring event <br /> Groundwater flow was to the east to northeast at 0 004 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 Inconal In <br /> able <br /> enior Geologist <br /> ATTACHMENTS: <br /> 0 Attachment A—March 16,2001 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, 1120 South Hunter Street, Stockton, CA 95206 <br />