ARCHIVED REPORTS XR0012588 - Laserfiche WebLink

Home Browse Search

I}iscusSioTi and Inter retation of Results In order to provide graphic presentation of the results, individual data sets in Table 1 have been mapped and contoured to produce Figures 2 through 5. Dashed contours are used where patterns are extrapolated into areas of less complete data, or as auxiliary contours. A relatively high Total Volatiles level was observed southeast of the `g'�usp ---.-,lands (Station 14) , with mo'-*a moderate concentrations extending along the eastern property boundary (Stations 6 and 7) . Concentrations decline rapidly to the t'as:: and west from the "huc�h" '. at Station 1:4, indicating limited migration in those directions. The full eastern extent of the occurrence is not evident fror, tiht ! t survey. ,ow levels of Total Volatiles were detected througho: eastern portion of the site and much of the remaining ut station a% p islands and-.the car wash. 23, between file Pum qentane s]cciirrence Although less spatially extensive, the MTBE/p (Figure 3) was similar to the Total Volatiles feature. However, the isolated anomaly at Station 23 was not evident. Like the . s, benzene previously mentioned analyte (Figure 4} , ettiylbenzene, est at Station 14, with lower levels s 4. i and the xylenes were high � - extending northward to the entrance driveway and landscape bed (Stations 6 and 7) along. Pershing Avenue The toluene level (Figure 5) was also highest southeast of the pump islands. Low concentrations extend into tank area, and along the eastern side of the property to the northeast corner. --- -- ---- ----:--—The chromatogram-signature of Sample-14 (southeast of the pump ---- --------_---- - island, where Total Volatiles were highest} was typical of "fresh" �. �.: - 7 MEN NORM s r„ S