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k%j KLEINFELDER ' 3 FIELD ACTIVITIES ' Based on the workplan prepared by Kleinfelder and approved by the RWQCB, Kleinfelder secured boring permits from the San Joaquin County Public Health Services Environmental ' Health Division. Two deep soil borings were advanced to assess soil and groundwater at the 1 million-gallon pond and the proposed 72 million-gallon pond locations. Four additional shallow soil borings were advanced in the spray disposal fields on the site. 3.1 PRE-FIELD ACTIVITIES ' The San Joaquin County Public Health Services Department/Environmental Health Division ' (PHS/EHD) requires completion of boring permit and payment of fees prior to advancing exploratory borings. Kleinfelder prepared the drilling permit application and submitted it to ' PHS/EHD along with the required fees. A copy of the permit to drill is found in Appendix A. Underground Service Alert was contacted prior to conducting fieldwork to notify local utilities of ' our proposed subsurface work. Kleinfelder additionally prepared a health and safety plan prior to proceeding with field activities in accordance with the RWQCB requirements. 3.2 EXPLORATORY BORINGS ' 3.2.1 Shallow Soil Borings iFour shallow soil borings were advanced in the land application area to an approximate depth of thirty(30) feet below the ground surface. One boring was advanced in the disposal field north of ' the Western Pacific Railroad, and one boring was advanced south of the processing facility in an area communicated to Kleinfelder as a newly proposed spray application field. Two additional borings were advanced south of the Western Pacific Railroad (see Plate 2). The four shallow soil borings were advanced with a drill rig mounted on a tracked vehicle equipped with straight flight auger. During advancement of the soil borings, soil samples were collected at five-foot intervals for lithologic classification. Soil samples were collected by ' advancing the soil boring to a point immediately above the desired sampling depth and then driving a Modified California Split-Spoon Sampler, lined with three 2-inch diameter by 6-inch ' long stainless steel tubes, into the undisturbed soil. The sampler was removed from the bottom 20-2594-03.004/2011R447 Page 5 of 16 ' Copyright 2001 Kleinfelder,Inc. June 8,2001