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SSample Number EPA Method Miodified 8015'IPH(m lk ) <br /> SB9B Curtis &Tompkins ND - 5 <br /> SB10A Curtis &Tompkins ND <br /> SB1113 Curtis &Tompkins ND S <br /> 1 <br /> SB12B Curtis &Tom kins ND !� S <br /> r <br /> SB14B Curns &Tom kens ND 7•S <br /> r <br /> SB15B Curtis &Tompkins ND 2Qr <br /> ND s Not Detected <br /> Detection Limits <br /> EPA Method = 10 mg/kg M8015 <br /> •Analytical results of sample after laboratory re tut <br /> 7.0 GROUNDWATER INVESTIGATION <br /> 7.1 Introduction <br /> CRC conducted a groundwater investigation at 2233 Grand Canal Boulevard, in the <br /> City of Stockton, County of San Joaquin, California after the remediation work <br /> The investigation included the installation, development and sampling of three (3) <br /> groundwater monitoring wells surrounding the elevator pit excavation <br /> A drilling permit for the installation of three (3) monitoring wells was obtained by <br /> CRC from the SJCPHS A copy of the well permits are provided in Appendix VII <br /> From December 7 through December 12 1994, three (3) soil borings were drilled <br /> to a depth of 21 teet bgs using a limited access drill rig equipped with continuous <br /> flight 8-inch hollow stem augers Soil samples were collected at 5, 10 and 15 feet <br /> After completion of the drilling and soil sampling, the borings were converted to <br /> groundwater monitoring wells by the installation of 2-mch diameter slotted PVC <br /> casing The locations of the monitoring wells are shown on the Boring Location <br /> Survey Map (Appendix I) <br /> 7,2 Soil Boring and Soil Sampling Procedures <br /> Prior to start of the drilling operations, a Tailgate Health and Satety meeting was <br /> conducted by the Project Manager to discuss potential health and safety risks and <br /> the appropriate precautions required to avoid or reduce such risks All field <br /> personnel present signed the Attendance List in the Health and Safety Plan <br /> (Appendix III) <br /> Ofiaro Building Engineering Construction drilled the borings and installed the <br /> monitoring wells Ofiaro is a California-licensed environmental drilling contractor, <br /> License No C-450-915 A portable drill rig equipped with 8 25-inch diameter <br /> CRC Environmental Risk Management Inc Project M 3620-001-4 <br /> George Bravante Receiver 2233 Grand Canal Boulevard <br /> January 19 1995 g Stockton California <br />