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06 November 2002 <br /> AGE-NC Project No 98-0432 <br />' Page 5 of 8 <br />' 41 SUBSURFACE SOIL PROFILE <br /> In general, brown silty sand and poorly-graded sand were encountered at 5 feet bsg and between <br />' 20 and 30 feet bsg, brown silt was encountered between 10 and 15 feet bsg and below 30 feet bsg <br /> Boring logs are provided to Appendix A <br /> I42 ANALYTICAL RESULTS OF SOIL SAMPLES <br />' A total of 4 soil samples from well MW-9 were analyzed by Cal Tech Environmental Laboratories <br /> (CTEL), a DHS-certified laboratory in Paramount, California <br />' TPH-g was detected in samples MW9-20, MW9-25 and MW9-30 at a maximum <br /> concentration of 260 gg/kg, TPH-d was detected in sample MW9-20 at a concentration of <br /> 800 µg/kg <br />' 0 The BTEX compound xylenes was detected in only one sample,MW9-20 at a concentration <br /> of 0 99 gg/kg <br /> • MTBE was detected by EPA Method 8260 in samples MW9-15,MW9-25 and MW9-30 at <br /> concentrations of 0 016 gg/kg, 0 54 gg/kg andgg/kg, respectively <br /> 0.�rl Wyk, \;,o143 <br />' No other target analytes were detected in the samples analyzed Analytical results of soil samples are <br /> summarized on Table i The laboratory report (CTEL I D Nos 0205-059-1 through -4), quality <br />' assurance and quality control (QA/QC) report and chain-of-custody forms are included in <br /> Appendix E <br /> 1 43 AQUIFER PUMPING RESULTS <br />' During the constant rate pumping test the following maximum water drawdown was observed <br /> • The maximum ground water drawn-down in extraction well EW-1 was observed to be <br />' approximately 9 76 feet after 2,880 minutes of pumping, <br /> • Draw-down was observed in well MW-I (located 20 feet toward the southeast) at 0 4 feet, <br />' Draw-down was observed in well MW-9 (located 45 feet toward the west) at 0 22 feet after <br /> 720 minutes, <br /> • Draw-down was observed in well MW-2 (located 65 feet toward the northeast) at <br /> approximately 0 15 feet after 2,880 minutes of pumping, <br /> • Drawdown was observed in well MW-7 and MW-8 (located 95 feet toward the east and <br /> 110 feet south) at approximately 0 1 feet, <br /> Advanced GeoEnviron mental,Inc <br /> I <br />