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r , <br /> A.. <br /> E <br /> 1K1 <br /> TOTEAM <br /> February 23, 1994 <br /> MOBIL OIL CORPORATION ALTON GEOSCIENCE <br /> 3800 West Alameda Avenue, Suite 700 30A Lindbergh Avenue <br /> Burbank, California 91505-4331 Livermore, California 94550 <br /> Alton Project No. 30-0136 <br /> ATTN: MR. STEVE PAO <br /> SITE: FORMER MOBIL BULK PLANT 04-343 <br /> 500 EAST GRANTLINE ROAD <br /> TRACY, CALIFORNIA <br /> RE: QUARTERLY PROGRESS REPORT, JANUARY THROUGH MARCH 1994 <br /> This report presents the results of fluid-level monitoring and ground water sampling. On <br /> January 21, 1994, fluid-levels were measured and ground water samples were collected from <br /> Monitoring Wells AW-1 through AW-12. Ground water samples were submitted to a state- <br /> certified laboratory for analysis. No hydrocarbons were detected in any of the wells except AW- <br /> 3, which had a reported concentration of TPH-D just above the detection limit. The results are <br /> attached. <br /> . <br /> ATTACHMENTS: <br /> • Figure 1: Vicinity Map <br /> • Figure 2: Ground Water Elevation Contour Map <br /> • Figure 3: Dissolved-Phase Hydrocarbon Concentrations <br /> • Table 1: Summary of Ground Water Sampling and Analyses <br /> • Appendix: Field Procedures, Laboratory Reports, Chain of Custody Records, and <br /> Field Data Sheets <br /> Please call us at (510) 606-9150, if you have any questions regarding this project. <br /> ALTON GEOSCIENCE <br /> No ern California Operations zi <br /> * No. sM2 <br /> or <br /> Stephan Rosen /!Zssociate <br /> mes A. Lehrman, R.G. � °F CAt►F°P& <br /> Senior Geologist <br /> ,no ongoi g prejcct services summarized in this report have boa eonductcd in accordance with curtest practice and the standard of Bare exercised by geologists <br /> and engin=performing- tasks in this area. The findings aro based solely upon an analysis of the observed conditions. If actual conditions differ from <br /> those described in this report,our office shmAd be notTi d. <br /> m 1...lmobiF%04-343104-343r4.gtm <br /> 30A Lindbergh Avenue <br /> Livermore,California 94550 <br /> (510)606-9150•FAX(510)606-9260 <br />