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62/11/1999 13:59 2695385852 GEOLOGICAL TECHNICS1 <br /> PAGE. 03 I <br /> y <br /> yw��`F[CF7ttICf 2►tC. "�� . <br /> Arctic Ice—D Street ! <br /> Site Closure Check hist <br /> Project No.691.2 <br /> February I I,1999 <br /> I <br /> 4 Stockpiled Soil <br /> No stockpiled soil relating to the former underground storage tanks is stored on this property. <br /> 5.' Monitoring wells <br /> Not Applicable <br /> 6•' Groundwater Gradient Tabulated Data <br /> Not Applicable <br /> I <br /> 7- Analytical Tabulated Data <br /> Attached is a summary data table of soil analyses made by Geological Technics during their <br /> 1 <br /> investigation. Detection limits are indicated_ <br /> S. Contaminant Contours <br /> Diesel was found only in the original tank closure samples collected at a depth of <br /> approximately 9 feet below ground surface. <br /> 9. Remedial System <br /> Not Applicable " <br /> 111.Reportsfinformation <br /> Unauthorized release form (URF), tank closure report, soil investigation,report, and other <br /> correspondence are on file with the County and are not included in this summary report, <br /> 11.BAT <br /> Not Applicable <br /> 12. Background Conditions <br /> Since the tarokand the primary soil contamination source has been removed, eventually <br /> backround conditions will be achieved_ <br /> 13. Residual Contamination <br /> The.soil test data.shows that only a smill volume of soil below the north end of the tank <br /> contains diesel. The lab report noted that this diesel was weathered, which corroborated the <br /> reported history of this tank. The tank had not been used for approximately 20 to 25 years. <br /> No diesel was found below 11 feet in lab analysis, although the soil down to approximately <br /> 18 feet exhibited a petroleum,type odor. <br /> 14.Model Parameters ! <br /> Not Applicable <br /> 'I <br /> l <br /> r <br /> .I <br />