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11 June 2004 <br /> AGE-NC Project No. 04-1170 <br /> Page 2 of 5 <br /> fluvial,and alluvial environments with sediment sources being the mountain ranges surrounding the <br /> valley(Olmsted and Davis, 1961);the site itself is located on unconsolidated and semi-consolidated <br /> alluvium, lake, playa and terrace deposits of Quaternary age (California Division of Mines and <br /> Geology, 1977).Rocks composing the basement complex of the Province have not been completely <br /> defined but are believed to be metamorphic and igneous in origin. <br /> The Modesto, Riverbank and Turlock Lake Formations and overlying Recent alluvium are the <br /> principal sources of domestic ground water in the 13,500-square mile San Joaquin Valley Ground <br /> Water Basin(Basin 5-22). The estimated depth to ground water at the site is approximately 35 feet <br /> below surface grade based on information from surrounding sites monitored by AGE.However,this <br /> may be greatly modified by local recharge and discharge patterns. <br /> 3.0. PROCEDURES <br /> The field work reported herein was performed in accordance with procedures outlined in the <br /> AGE-prepared Limited Subsurface Investigation Work Plan, dated 26 May 2004, and approved by <br /> EHD 03 June 2004. <br /> 3.1. DRILLING <br /> Four soil probe borings (B-1 through B-4) were advanced at the site on 07 and 08 June 2004 to <br /> collect soil and ground water samples as part of the assessment activities.The borings were advanced <br /> to 35 feet below surface grade (bsg) using "direct push" technology, utilizing a truck-mounted <br /> Geoprobe 5400 equipped with a 2.15-inch diameter soil sampler attached to 1.125-inch diameter <br /> probe rods; The soil boring locations are presented below and on Figure 2: <br /> • Boring B1 was advanced approximately 26 feet west of the southeast corner of the theater <br /> building. <br /> • Boring B2 was advanced approximately 66 feet west of the southeast corner of the theater <br /> building. <br /> • Boring B3 was advanced approximately 36 feet north of the southeast corner of the theater <br /> building. <br /> • Boring B4 was advanced approximately 110 feet north of the southeast corner of the theater <br /> building. <br /> Advanced GeoEnviron mental,Inc. <br />