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KLEINFELDER <br /> 4 ACTIVITIES CONDUCTED <br /> Kleinfelder obtained boring/well permits from the San Joaquin County Public Health Services <br /> Department Environmental Health Division (PHS/EHD) As a part of the assessment, three <br /> exploratory soil borings were advanced to a maximum depth of 40 feet Hydropunch IITM <br /> groundwater samples were collected from the 3 exploratory borings During the advancement of <br /> the soil borings, Kleinfelder collected soil samples for logging purposes, field screening and <br /> potential chemical analysis The soil borings were advanced using 8-inch outside diameter hollow <br /> stem auger Chemical analysis was not conducted on the soil samples collected because of non- <br /> detect field readings, absence of visual soil staining, and the lack of petroleum hydrocarbon odors <br /> Groundwater samples from all borings were analyzed for chemical constituents In addition, a <br /> surface water sample was collected from the channel adjacent to soil boring HP-3 for chemical <br /> analysis <br /> 1 4 1 PRE-FIELD ACTIVITIES <br /> A limited scope workplan was submitted to the San Joaquin County PHS/EHD for review and <br /> approved well/boring permits were obtained prior to Initiating the field activities <br /> 4 2. FIELD ACTIVITIES <br /> ' 4 2.1 SOIL/ HVDROPUNCH IITm BORINGS <br /> I <br /> A total of three soil borings (I IP-1, HP-2 and HP-3) were advanced along the inside perimeter of <br /> the seawall (refer to Plate 2) The soil borings were advanced using a truck-mounted drill rig <br /> equipped with 8-inch diameter hollow stem augers Soil samples were collected beginning at a <br /> depth of 5 feet and every 5 feet thereafter for logging purposes and potential chemical analysis <br /> The borings were drilled, logged, and sampled according to the protocol described in Appendix <br /> B The soil samples collected were to be field screened using an organic vapor detector as <br /> Ndescribed In Appendix B, Section B-2 2 The borings were advanced to depths of 40 feet below <br /> existing grade Groundwater was initially encountered at a depth of 18 to 19 feet below grade <br /> Groundwater roseto a final depth of 11 feet after 2 hours in boring HP-3 Groundwater samples <br /> were collected in the three borings (HP-1, HP-2 and HP-3) by means of the Hydropunch IIT"' <br /> Copies of the boring logs are included in Appendix A <br /> 20-1129-3012017831.1 Page b of 13 <br /> © 1997 Kleinfditr Inc. luly 14 1997 <br />