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Discussion and Interpretation of Results <br /> Its order to provide graphic presentation of the results, <br /> individual data sets in Table 1 have beer, mapped and contoured to <br /> produc:i Figures 2 through 5. Dashed contours are used where <br /> patterns are extrapolated into areas of less complete data, or as <br /> '~ auxiliary contours. <br /> i .. <br /> A relatively high Total Voiatiles level. was observed southeast <br /> of the pump islands ,Station 14) , with more moderate concentrations <br /> extending along the eastern property boundary (Stations S and 7) . . <br /> Ccicentrations decline rapidly to the east and west from the "high" <br /> at Station 14, indicating limited migration in those directions. i <br /> j r The full eastern extent of the occurrence is not evident from this <br /> t survey. Low .levels of Total Volatiles were .detected throughout <br /> much of the remaining eastern portion of the site and at Station <br /> 23, between the pump islands and the car wash. i <br /> E Although .Less spatially extensive, the YATBE/pentane occurrence <br /> (Figure 3) was similar to the Total Volatiles feature..: however , <br /> F <br /> the isolated anomaly at Stati'bn' 23 was not evident Like the <br /> previously: mentioned analytes, benzene (Figure 4) , ethylbenzene, <br /> and the xylenes were highest at Station 14, with lower levels <br /> extending northward to the entrance driveway and landscape bed <br /> : <br /> z- <br /> �` L (Stations 6 and 71' along Pershing Avenue. The toluene level <br /> 4 <br /> (Figure 5) was also highest southeast of the pump islands. Low <br /> concentrations extend into tank area, and along the eastern side <br /> A of":the property, to the northeast coxner. <br /> .f <br /> I The chromatogram signature of Sample 14 {southeast of the pump <br /> ` island, where Total'Vola t. •les were highest) was typical of "fresh" <br /> V. <br /> _ 1 <br /> .. r <br />