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SIERRA 11�� JUL 01�K.LK r June 28, 1994 Enviroameotal Stnices Kenneth Kan Chevron USA Products Company P O Box 5004 San Ramon, CA 94583 Re Former Chevron Service Station#9-0959 103 W 1 lth Street Tracy, California SES Project #1-299-04 Dear Mr Kan This report presents the results of the quarterly ground water sampling at former Chevron Service Station #9-0959, located at 103 W 11th Street in Tracy, California Three wells, MW-1 through MW-3, were sampled (Figure 1) On June 1, 1994, SES personnel visited the site Water Ievel measurements were collected in all site wells and all wells were checked for the presence of free-phase hydrocarbons Free-phase hydrocarbons were not present in any of the site wells Water level data are shown in Table 1 and ground water elevation contours are included on Figure 1 The ground water samples were collected on June 1, 1994 in accordance with SES Standard Operating Procedure- Ground Water Sampling (attached) The field water sampling forms for this event are included All analyses were performed by GTEL of Concord, California Analytic results for ground water are presented in Table 1 The chain of custody document and laboratory analytic reports are attached SES is not responsible for laboratory omissions or errors Thank you for allowing us to provide services to Chevron Please call if you have any questions Sincerely, EUSSI ` Sierra Environmental Services q Ioo:`%C _ Cr` Argy Staff WG—eol g t C 04 c f16 r � rc fl6 Chris J Bramer AJM/CJB/Io Professional Engineer #C48846 " 29904QM JN4 Attachments Figure Table SES Standard Operating Procedure Field Water Sampling Forms Chain of Custody Document and Laboratory Analytic Reports P.O. Box 2546 11 Martinez, California 94553 * (510) 370 - 1280