Laserfiche WebLink
Site Background Information: former Blue Star Gasoline <br /> Page 3 of 3 <br /> installed at the site, with screened intervals installed from 60 feet to 80 feet bsg. No <br /> petroleum hydrocarbon constituents were detected at or above laboratory detection limits in <br /> the soil samples analyzed. <br /> Analytical results of soil and grab ground water samples are included in Table 1 of this appendix. <br /> To date, the lateral extent of petroleum hydrocarbon contamination is not yet defined. <br /> STRATIGRAPHY <br /> In general,silt and clayey silt were encountered from surface grade to 50 feet bsg in MW-1,67 feet <br /> bsg in MW-2, and 77 feet in MW-3,underlain by alternating layers of silty sand, sandy silt, sand, <br /> silt, and clayey silt to the total depths of the borings (80 feet to 85 feet bsg). <br /> QUARTERLY GROUND WATER MONITORING EVENTS <br /> From May 2005 through March 2007,AGE conducted eight ground water monitoring events at the <br /> Blue Star Gasoline site. The three site wells are all impacted by petroleum hydrocarbons; the fuel <br /> components detected have been TPH-g, MTBE and 1,2-DCA, with infrequent detections of the <br /> BTEX compounds toluene,ethylbenzene and xylenes.Generally,ground water elevation at the site <br /> has been increasing since May 2005; contaminant concentrations in ground water have generally <br /> increased or remained constant. <br /> Advanced GeoEnvironmental,Inc. <br />