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A ALTON <br /> GEOSCIENCE <br /> THE RESULTS TEAM <br /> December 15, 1993 <br /> MOBIL OIL CORPORATION ALTON GEOSCIENCE <br /> 3800 West Alameda Avenue, Suite 2000 30A Lindbergh Avenue <br /> Burbank, California 91505-4331 Livermore, California 94550 <br /> Alton Project No. 30-0136 <br /> ATTN: MR. STEVE PAO <br /> SI'Z'E: FORMER MOBIL BULK PLANT 04-343 <br /> 500 EAST GRANTLINE ROAD <br /> TRACY, CALIFORNIA <br /> RE: QUARTERLY PROGRESS REPORT, OCTOBER THROUGH DECEMBER <br /> 1993 <br /> This report presents the results of fluid-level monitoring and ground water sampling. On <br /> October 28, 1993, 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. The results are attached. <br /> ATTACEM4ENTS: <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 and Chain of Custody Records <br /> Please call us at (510) 606-9150, if you have any questions regarding this project. <br /> ALTON GEOSCIENCE <br /> Northern California Operations <br /> Stephan Rosen James A. Lehrman, R.G. <br /> Senior Geologist Associate <br /> The ongoing project services summarized in this report have been conducted in accordance with current practice and the <br /> standard of care exercised by geologists and engineers performing similar tasks in this area. The findings are based <br /> solely upon an analysis of the observed conditions. If actual conditions differ from those described in this report, our <br /> office should be notified. <br /> m:1...Imobi1104-343104-343r3.gfm b�Ww0 <br /> � <br /> No.5032 <br /> 30A Lindbergh Avm <br /> Live]m.Uifomia 94550 <br /> (510)606.9150-FAX(510)606.9260 <br /> ��F C ALIF�� <br />