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21 January 1993 <br /> (GeoAudit CV 42F4-1. 68) <br /> Page 4 of 4 <br /> ' the capillary fringe above groundwater. Lighter components of the <br /> gasoline have probably volatilized or been degraded by natural <br /> degradation processes. Remaining concentrations of ethylbenzene <br /> are very low, and do not exceed the LUFT nanual's maximum allowable <br /> rconcentration of 40 ppm for ethylbenzene in any single sample, nor <br /> the allowable cumulative concentration level of 10 ppm for sites <br /> with mean annual precipitation of 16-18 inches, nor the Department <br /> of Health Services action level for ethylbenzene in groundwater <br /> ( . 680 ppm) . Therefore, we do not believe the detected contamination <br /> poses a significant threat to groundwater, and we recommend no <br /> further assessment or remediation at this site. <br /> Soil from the borings is presently stored in barrels on the site. <br /> We recommend that this soil be spread over the site and graded <br /> ' smooth. <br /> r <br /> ! <br /> I I <br /> I 1 I I I <br /> I ' <br /> t <br /> �I <br /> I <br /> I II I , <br /> I I flll I I I I I I II I I <br /> I f <br /> i <br /> III i III II�r II II Iltli I 11 11 IIIA I Ih! ' fl I�' _ n III Inl I,h[ e'E rI I r 'v I � EIII i i r V _ IIII I_r <br />