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Monza Brothers Service Station 20 Novcnihvr U, 1992 1ABLE 5 d ' Analytical Results expressed in micrograms per liter (pph) N� TPpH MH Benzene TQjUene �h Qtal 'Ick 5c�luh Casaltne { hen�_zenX lenes Lea I-e-0 MW-1 60 4. ND ND ND ND ND 238 ND MW-2 470 ND TO' 1 6 a ND ND 236 ND T13 SSU ND 19 0* ND ND ND 73 ND ND ND ND ND ND FB MW-3A ND ND --ND ND ND MRL 10 2,000 05 05 05 05 20 (15 MCL-P 0 67 2000 684 (,750 50 MCL-S 40 30 20 ND None Detected above Minimum Reporting Level (MRL) TB Travel BIank . FB Field Blank * exceeds current MCL MCL-P State of California Primary Maxtnnun CUntammant Levels MCL-S State of California Secondary Maximtun Coutanunant Levels 5 0 CONCLUSIONS Gasoline hydrocarbons were not detected in the soil sample tram the capillary ti inge to groundwater in the soil samples collected from the three monitoring wells, nor were gatioline hydrocarbons detected below a depth of 30 feet during the %cal characterization This indicates that no gasoline hydrocarbons have migrated vertically through the Soil beneath a depth of 30 teei at the property 1 oral lead has not been detected in soil samples above the native concentrations present within the soil TPPH as gasoline was detected at the minimum reporting level cit 1 0 rtig/kg in the soil sample trom 10 feet below the top of the perched aquifer in the underlying aquitard It is highly probable that this concentration indicates cross contamination J from the gasoline hydrocarbons within the overlying groundwater zone, and does J not indicate that gasoline hydrocarbons are present within the underlying aquttaid No volatile aromatics were detected in this sample, nor were gasoline hydrocarbons detected in the two samples tram the aquitard in the other two monitot ing well% EB-8101-3 9210-17055 RPI 1