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Updated Site Conceptual Model and Second Quarter 2003 Monitoring and Remediation Report <br /> Cleanu and Abatement Order No 5-00-707 EAI Pro ect No 1232 <br /> 5.5 Analytical Testing Results <br /> 5 5 1 Units A and B Wells <br /> For Units A and B, similar hydrocarbon concentrations were generally observed during this <br /> sampling event when compared to the prior quarters data with the exception of wells in the area <br /> Of the remediation system In general, wells in the area of the remediation system had slightly <br /> higher testing results indicating the remediation system is liberating hydrocarbons entrained in <br /> soils within the saturated zone Hydrocarbons released by the remediation system are currently <br /> being bioremediated before reaching the down gradient perimeter wells MW-9 and MW-27 <br /> (see Section 5 5 3) <br /> Figure 14 summarizes the TPH-G, BTEX, and MTBE concentrations in ground water for the <br /> May 2003 ground water sampling event No MTBE, TBA, DIPE, ETBE, TAME, or EDB <br /> above laboratory reporting limits were detected in any of the ground water samples <br /> 5 5 2 Units C and D Wells MW-81) MW-23S/L) and MW-24S/D) <br /> Similar or lower hydrocarbon concentrations were generally observed during this sampling <br /> event when compared to the prior quarters data (Table 1) <br /> Sparging of Units C and D will not be conducted at this time It is EAI's opinion that with time <br /> oxygen infected into Units A and B will diffuse downward to remediate the deeper zones <br /> 5 5 3 Perimeter Wells <br /> Hydrocarbon concentrations in lateral and down gradient wells MW-5, MW-7, MW-9, MW-13, <br /> MW-14, MW-15, MW-18, and MW-27 were below the laboratory detection limit during this <br /> ground water sampling event <br />■ <br /> BHM WORD 123280351 -8- ENVIRONMENTAL AUDIT, INC p <br />