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KL E/NFEL DER <br /> Bright People.Figh(Solutions. <br /> Previous investigations by others indicated that soil and/or groundwater may be <br /> impacted beneath the former waste oil drum storage building and former oil AST (soil <br /> only). The previous investigations noted that the former oil AST area which warranted <br /> further investigation was designated as location SS3A, and the waste oil drum storage <br /> building location was designated as SS5A. <br /> DISCUSSION <br /> Kleinfelder visited the site and marked the proposed assessment locations with white <br /> paint in accordance with Underground Service Alert protocols. Kleinfelder also prepared <br /> and submitted the required work plan/permit applications to drill with San Joaquin <br /> County Environmental Health Department (EHD). The permit number SR#0060950 was <br /> granted, and on September 2, 2010, Kleinfelder again visited the site to proceed with <br /> the collection of samples as outlined in the work plan. A copy of the permit can be <br /> found in Attachment B. <br /> Kleinfelder prepared a work plan dated August, 30, 2010, based on a scope of work <br /> recommended by the prior consultant and accepted by the City of Manteca. In <br /> accordance with this work plan, 1 grab groundwater and 18 soil samples were collected <br /> from 7 locations on the Site on September 2, 2010. Four locations (B-1, B-2, B-3, and <br /> B-4) were located in the former waste oil drum storage building, and 3 locations (B-5, B- <br /> 6, and B-7) were located at the former oil AST location. Soil and groundwater sampling <br /> methodology was conducted as generally described in Kleinfelder's Field Protocol <br /> located in Attachment C. <br /> Kleinfelder noted the soils encountered during this assessment were predominantly <br /> fine- to medium-grained sand from surface to approximately 14 feet bgs, and thereafter <br /> the sand was noted to be interbedded with silty sand, sandy silts, and minor sandy clay. <br /> Please note that these observations are based on minimal borings, only one of which <br /> was advanced beyond 10 feet to a total depth of 24 feet bgs. <br /> 112884.1/ST010R366R Page 2 of 10 October 1, 2010 <br /> Copyright 2010 Kleinfelder Revision 1, dated November 22,2010 <br />