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00-3737 <br /> • Obtained monitoring well installation permits from PHS-EHD (copies <br /> included in Appendix F); <br /> • Conducted an LSI at the Site to investigate subsurface soil and <br /> groundwater conditions at the Site which entailed the advancement of six <br /> soil borings, with subsequent installation of groundwater monitoring wells <br /> in each; <br /> • Field-screened soil samples for total organic vapors (TOV) using a <br /> Thermo Environmental Instruments, Inc. photoionization detector(PID); <br /> • Inspected the interior of Unit K on August 1 and Unit L on August 3, 2000 <br /> for evidence of oil and/or hazardous materials (OHM) storage or release; <br /> • Submitted selected soil and groundwater samples for laboratory analysis <br /> of volatile organic compounds (VOCs) by EPA Method 8260; <br /> • Compared all analytical results to standards promulgated by Cal EPA or <br /> the Central Valley Region Water Quality Control Board (CVRWQCB); <br /> and, <br /> • Prepared this LSI report. <br /> 1.3 Environmental Conditions <br /> Paragon identified the following recognized environmental conditions (evidence of an <br /> existing release, past release, or material threat of release of OHM) at the Site: <br /> • The Twining SGS identified a release of PCE at the Site, primarily in <br /> subsurface soils located just south of the Site building. <br /> • Field screening results did not indicate the presence of significant TOV <br /> (greater than 25 ppmv1) in any of the soil samples we collected. <br /> • Laboratory analysis of two soil samples we collected did not indicate the <br /> presence of any VOCs. <br /> • Laboratory analysis indicated the presence of low concentrations of PCE in <br /> three of six groundwater samples. <br /> 1 ppmv=Parts-per-million by volume,calibrated"as benzene." <br /> 3422 West Hammer Lane,Stockton,California <br /> —2— <br />