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6,0 Conclusions <br /> Based on the field observations and laboratory analytical data presented in this report, Shaw <br /> concludes the following <br /> I0 Soil types encountered in the soil bonngs generally consisted of clay with sand <br /> and silt <br /> t0 Groundwater monitoring wells MW-1, MW-2, and MW-3 were constructed in the <br /> bonngs PB-1, PB-2, and PB-3 <br /> 1 TPH-D, BTEX constituents, and MTBE were not encountered in the laboratory <br /> analysis of the soil samples collected during well installation activities <br />' 0 Following installation and development of wells MW-1, MW-2, and MW-3, a <br /> quarterly monitoring and sampling program was initiated <br /> Groundwater was present at an average measured depth of 10 44 feet bsg, with an <br /> average groundwater surface elevation of 39 09 feet above msl <br /> IThe groundwater gradient was directed to the southwest at approximately 0 06 <br /> foot per foot <br /> • TPH-D,TPH-G, BTEX constituents, and MTBE were not detected in <br /> groundwater samples collected during quarterly monitoring activities <br /> 7.0 References <br /> IT Corporation (IT, 2002a), Underground Storage Tank Removal Report, Pacific Bell Facility, <br /> 10 East 12th Street, Tracy, California, April 2002 <br /> IIT Corporation (IT, 2002b), Underground Storage Tank Removal Report, Pacific Bell Facility, <br /> 10 East 12th Street, Tracy, California, May 2002 <br /> IIT Corporation (IT, 2002c),Additional Site Assessment Activities Report, Pacific Bell Facility, <br /> 10 East 12'h Street, Tracy, California, November 2002 <br /> Shaw Environmental, Inc (Shaw, 2003), Site Conceptual Model, SBC Facility, 10 East 12'h <br /> P h' <br /> MStreet, Tracy, California, April 2003. <br /> I <br /> CNCD/08-11-0310 SHARFJUST/03-0096 doc 7 <br />