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i? <br /> hq KLEINFELDER <br /> 4 ACTIVITIES CONDUCTED <br /> Kleinfelder conducted the 1.ollowing scope .of services during our limited .preliminary site <br /> assessment. Our services included the following three tasks: <br /> 1. Permitting And Pre-Field.Aetivi ties <br /> L2. Drilling Of Four Soil Borings <br /> 3. Reporting <br /> 4.1 PERMITTING AND PRT'-FIELD ACTIVITIES <br /> r <br /> Kleinfelder's ".Revised Proposal/Workplan, Limited Preliminary Site Assessment, Delta Sigh & <br /> Crane Service...", dated .lune 16, 1999 and an "Application for Well and Pump Permit" were <br /> subinitted to San Joaquin County Public Health Services Environmental Health Division <br /> (PHS/EHD) for approval. Approval was obtained on October 14, 1998, prior to initiating field <br /> work. The boring location area was marked in white paint and Underground Service Alert was <br /> notified at least 48 hours prior to drilling activities. For a copy of the boring permit, please refer <br /> to Appendix C. <br /> 4.2 DRILLING OF FOUR SOIL BORINGS <br /> On October 19., 20, and 21, 1998, four soil borings were advanced at the site in the vicinity of a <br /> former UST (See Plate 1). The borings were advanced using a truck-mounted drill rig equipped <br /> with 6-inch hollow stens augers. Soil samples were collected at 5 foot intervals beginning at 5 <br /> feet for lithologic classification, quantitative field screening and potential chemical analyses. <br /> Lithologic classification was based on the Unified: Soil Classification System (USCS). Field <br /> screening of soil samples were conducted with an organic vapor analyzer (OVA). The borings <br /> were drilled, logged, and sampled following the protocol described in Appendix B. <br /> Boring (B-1) was advanced in the approximate center of the former UST location. Borings 2, 3 <br /> and 4 were advanced along the perimeter of the former UST to the south, northeast and north <br /> directions, respectively (See Plate 1). The borings were advanced to total depths ranging from <br /> approximately 3 1 to 56 .feet bgs. <br /> Soil samples were obtained at Live foot intervals in each boring for logging purposes and <br /> potential chemical analysis. Soils were logged in accordance with the protocol in Appendix B. <br /> Soil cuttings generated while drilling were placed on visqueen and stored on site. Water <br /> generated from the drilling and field equipment decontamination was stored in 55 gallon drums <br /> on site. <br /> 20-2864-02.E03/2019R(132 Page 6 of 12 <br /> Q 1998,Kleinfelder, Inc. January 14,1999 <br />