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I r <br />' 20 October 200? <br /> . AGE-NC Project No 95-0111 <br /> Page 2 of 8 <br /> I <br /> Groundwater was encountered in the tank excavation,groundwater samples were collected from the <br />' tank excavation Analysis of the samples indicated that hydrocarbon Impacted ground water was <br /> present at the site <br />' The underground storage tanks were replaced with a new, double-wall, fiberglass fuel dispensing <br /> system, in the salve location <br />' <br /> 23 PREVIOUS SITE INVESTIGATIONS <br />' Based on analytical results of soil and water samples collected during the UST removals, a soil and <br /> ground water investigation was required by the EHD The following Is a brief summary of the site <br />' assessment investigations.conducted at the site to date <br /> • 05 January 1994-five soil borings(B-1 through B-5)were advanced at the site, soil borings <br />' B-I and B-4 were advanced vertically to depths of 20 feet below surface grade (bsg), B-2 <br /> was advanced to 17 feet bsg, B-3 was advanced to 5 feet bsg, boring B-5 was advanced to <br /> 10 feet bsg,boring logs for B-1 through B-5 are included with Appendix B Borings B-1,B-2 <br />'. and B-4 were converted into 2-inch diameter ground water monitoring wells MW-1,MW-2 <br /> and MW-3, all with 10 feet of screen Discrete soil samples were collected at 5 feet bsg and <br /> 10 feet bsg m borings B_-1� B-2, B-4 and B-5 and 3 feet bsg and 5 feet bsg In bon_ng B-33 <br />' TPH was as detected In soil samples collected from borings B-1 at concentrations ranging ash <br /> high as 2 4 milligram per kilogram (mg/kg) TPH-d was detected In soil samples collected <br /> from B-2 and B-3 at concentrations ranging as high as 4 4 mg/kg BTEX compounds were <br />' detected in soil samples collected from B-1 and B-5 at concentrations ranging as high as <br /> 0 057 mg/kg,Analytical results of soil samples are summarized in Table 1 Field procedures <br /> and sample results were outlined In the Advance Soil Technology,Inc -prepared Quarterly <br />' Ground Water Monitoring First Quarter 1994, dated IS May 1994 <br /> • 06 December 1994 - four soil borings (13-6 through B-9) were advanced at the site, soil <br />' borings B-6, B-7 and B-9 were advanced vertically to depths of 20 feet bsg, B-8 was <br /> advanced to 10 feet bsg, boring logs for B-6 through B-9 are included with Appendix B <br /> Boring B-6 was converted into 2-Inch diameter ground water monitoring wells MW-4 with <br />' 15 feet of screen Discrete soil samples were collected at selected intervals In b_onngs B-6, <br /> B-7 and B-9;TPH-g was detected in soil samples collected from borings B-7 and B-9 at- <br /> concentrations ranging as high as 40 mg/kg TPH-d was detected In soil samples collected <br />' from B-6, B-7 and B-9 at concentrations ranging as high as 40 mg/kg BTEX compounds <br /> were detected In soil samples collected from B-6, B-7 and B-9 at concentrations ranging as <br /> high as 0 19 mg/kg, Analytical results of soil samples are summarized In Table 1 Field <br /> 1 procedures and sample results were outlined In the Geological Audit Services,Inc -prepared <br /> . Quarterly Report -December 1994, dated 06 March 1995 <br />' Advanced GeoEnvironmental Inc <br />