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Findings From Water Sample Analysis <br /> . MW-2,MW-3,and MW-4 were dry and not sampled. MTBE concentrations in monitoring well EW-1 <br /> continues to be non-detect. Monitoring well GMX-1 continues to have trace amounts of MTBE,59ppb. <br /> Of the two wells sampled, TPHg continues to decrease after treatment, EW-1(85%),and GMX-1(27%) <br /> from the June 17 sampling date. Of the two wells sampled,BTEX compounds remain consistently low <br /> with Benzene and Toluene as non-detect and trace amounts of Ethyl-Benzene and Xylene. <br /> The proposed clean up levels from the approved "Final Remedial Plan" and the average remaining <br /> concentrations are as follows: <br /> Com-ound Concentration Goals Average Remaining_Concentrations <br /> Benzene 0.005mg/L ND <br /> MTBE 0.001 mg/L 0.012mg/L <br /> TPHg 2.Omg/L 0.0003mg/L <br /> With only two wells with water the direction and slope of the groundwater can not be calculated. It is <br /> hypothesized that the direction would be the same as the typical summer/fall direction,to the South-East. <br /> Conclusions <br /> Pumping has brought the plume to the surface for treatment and disposal. All regulated constituents have <br /> been brought within the EPA's drinking water standards. <br /> Recommendations <br /> Foothill Engineering continues to recommend that the San Joaquin County Public Health Services, <br /> Environmental Health Department issue a letter stating no further action is required for this site. <br /> Please contact Mike Vlach at(916) 729-5184 if any questions arise concerning this report. <br /> Respectfully submitted, <br /> QROF�5S1pNq <br /> Foothill Engineering ��� PROBER*1 <br /> C 57707 <br /> Mike Vlach, P.E. EXP.12-31-05 <br /> �TFOF <br /> Attachments:Groundwater sample Analysis Recap,Site Map,Del-Tech Field Report,Laboratory Reports <br /> cc: Diana Maragos, Attorney for Sun West Liquors, W. T. Mitchell Group <br /> • <br /> 3 <br />