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is DISPOSITION OF WASTEWATER The 70 gallons of wastewater that were generated from purging of the monitor wells and decontamination of the purging and sampling equipment were transported via a non hazardous waste manifest to Instrat, Inc , a licensed recycling facility GROUNDWATER GRADIENT AND FLOW DIRECTION Figure 4 shows the groundwater elevation giadient and flow direction determined from depth to water measurements at the four on-site monitor wells on December 6, 2004 The gioundwater elevation has decreased by an average of 0 4 feet since the previous quarterly monitoring round on September 29, 2004 The flow direction is to the East/Northeast The overall gradient is 0 002 feet/linear foot RESULTS OF CERTIFIED ANALYSIS OF GROUNDWATER SAMPLES The results of the certified analyses of groundwater samples collected from the four monitor wells on December 6, 2004 are shown in Table 1 Copies of the laboratory reports are included as Appendix C of this report TPH-G concentrations in MWI-MW3 ranged from a maximum of 5,700 ug/l at monitor well MWI to 1400 ug/1 at monitor well MW2 TPH-G was not detected in monitor well MW-9A that is located approximately 60 feet east of MW3 and associated with the . neighboring property at 1201 S Center (see Figure 5) Monitor well MW4, completed in a lower aquifer, showed a TPH-G concentration of 170 ug/l Benzene concentrations in MWI-MW3 ranged from a maximum of 1900 ug/I at MWI to 280 ug/l at MW2 Monitor well MW4 showed a Benzene concentration of<0 5 ug/l MTBE concentrations in MWI-MW3 ranged from a maximum of 29 ug/I at MW3 to 3 4 ug/1 at MW2 MTBE was not detected above 0 5 ug/1 in MW4 TBA concentrations in MWI-MW3 ranged from a maximum of 18 ug/L in MW3 to 7 6 ug/L in MW2 TBA was not detected above the laboratory limit of 0 5 ug/L in MW4 The remaining fuel oxygenants, ETBE, DIPE, and TAME were not found above the laboratory detection limits in any of the four monitor wells The lead scavenger 1,2 Dichloroetbane (DCA) was detected in a concentration of 2 4 ug/L in MW2 and MW3 DCA was not detected above the laboratory limit of 0 5 ug/L in MWI or MW4 1,2 Dibromoethane (DBA or EDB) was not found in any of the monitor wells above the laboratory detection limit of 0 5 ug/L Figure 5 shows the distribution of TPH-G, BTEX, and MTBE in groundwater and the estimated lateral limits of the TPH-G in groundwater as determined from groundwater samples collected on December 6, 2004 3 Arc Pump QM 10-12, 2004