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DISCUSSION <br /> • At the time of the first quarter 2005 monitoring event, groundwater elevations had increased 2 91 and 1 72 <br /> feet in wells MW-13 and MW-14 respectively, and decreased 4 37 feet in well AS-1 since the previous <br /> monitoring event (December 14, 2004) Groundwater in wells MW-13 and MW-14 are fluctuating within <br /> historical ranges, while depth-to-water in well AS-1 is at an all time low Wells MWA and VW were dry, <br /> consistent with historical data <br /> TPHG (360 µg/L), benzene (1 0 µg/L), and MTBE (0 85 dig/L) were reported in well MW-13 TPHG was <br /> also reported in wells MW-14 (340 gg/L) and AS-1 (94 pg/L) 1,2-DCA was reported in wells MW-14 (8 7 <br /> ug/L) and AS-1 (11 �tg/L) TBA, DIPE, ETRE, TAME, or EDB were not reported in any of the wells <br /> TPHG, BTEX, and MTBE concentrations reported in well MW-13 are at an all time low, while <br /> concentrations of hydrocarbons reported in wells MW-14 and AS-1 are generally consistent with historical <br /> data <br /> Bio-Venting <br /> Bio-venting activities were initiated on November 16, 2004 An oil-less compressor is utilized to pump air <br /> into wells MW-13, MW-14, and AS-1 In wells MW-13 and MW-14, the air is delivered via drop tubes <br /> installed to approximately 1 foot above the bottom of the well In well AS-1, the air is applied directly to the <br /> well casing, as in conventional sparging The air is delivered to the wells via subsurface conveyance <br /> piping Airflow was 62 liters per hour at a pressure of 20 pounds per square inch on March 15, 2005 <br /> ATTACHMENTS <br /> • Table 1 Groundwater Elevation and Analytical Summary <br /> • Figure 1 Site Location Map <br /> • • Figure 2 Site Map <br /> • Appendix A Field Data Sheets <br /> • Appendix B Sampling and Analysis Procedures <br /> • Appendix C Certified Analytical Reports and Cham-of-Custody Documentation <br /> • <br /> K ITeichert4Stockton-3031Quarterly120051Teichert_IQ05 DOC STRATUS <br />