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I ' Weldon Church Site Background Information ' Page 3 of 4 SITE ASSESSMENT ACTIVITIES ' Six soilrobe borings were advanced at the site on 20 December 1996. Soil and water samples were p g collected at discrete depth intervals from the majority of the probe borings. Figure 2 depicts the ' locations of the probe borings. TPH-g was detected in three of the soil samples analyzed at concentrations as high as 2,800 mg/kg ' (P3-6). BTEX compounds were detected in the same three samples at concentrations as high as 93 mg/kg(total xylene,P 1-6).The maximum benzene concentration detected was 2.8 mg/kg(P 1-6). ' TPH-g was detected in grab water samples at concentrations as high as 210,000 mg/l. BTEX compounds were also detected in four of five grab ground water samples at concentrations as high as 35,000 mg/1 (toluene P6). The maximum benzene concentration detected was 12,000 m9/1 (P6). The installation of the soil probe borings was summarized in the PIER prepared by AGE, dated 10 September 1996. IBetween July 1996 and April 1998, a total of six wells were installed on the site and surrounding properties in order to determine the lateral and vertical limits of the dissolved hydrocarbon plume. ' In July 1996, four soil borings were drilled and completed as 2-inch diameter ground water monitoring wells with slotted screens from approximately 5 to 25 feet bsg. ' In April 1997, soil borings B5 (MW-5)and B6(MW-6)were drilled and completed as ground water monitoring wells.Monitoring well MW-5 was completed using a 2-inch diameter PVC casing with a slotted screen from approximately 3 to 10 feet bsg.Ground water monitoring well MW-6 was dual- completed with screen intervals installed from a depth of 20 to 23 feet bsg and 3 to 13 feet bsg.The installation of the first four monitoring wells was summarized in the PIER prepared by AGE, dated ' 10 September 1996. On 07 May 1998, soil borings B13, B14, and B15 were advanced manually and one boring was ' completed as a ground water monitoring well.Borings B 13,B 14(MW-7),and B 15 were established on the property at 52 West Beverly Place. The installation of the borings was performed using a ' six-inch diameter hand auger. On 09 and 10 June and 26 August 2003,nine soil probe borings (B 16 through B24) were advanced ' on- and off-site. Seventeen soil samples were analyzed; TPH-g and various BTEX compounds were detected in ' samples B17-5, B18-10, and B20-8 at maximum concentrations of 15 (mg/kg) TPH-g (1320-8), 0.52 mg/kg benzene (B18-10), 0.18 mg/kg toluene(B17-5), 0.24 mg/kg ethylbenzene(B17-5), and 2.15 mg/kg xylenes(B17-5);xylenes were also detected in sample B16-5.5 at 0.006 mg/kg.The fuel 1 Advanced GeoEnvironmentai,Inc. 1