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1"`" r-'"" r--"r rte` r-",? ['I r--" r-" r-141 r^-v, r--P C"�+ Table 1 ' Summary of Soil Sample Analysis Former Mobil Bulk Plant 04-343 Tracy, California Boring Date of Depth TPH-G TPH-D Benzene Toluene Ethyl- Total Pb TOC Sulfides ID Sampling/ (feet) (ppm) (ppm) (ppm) (ppm) benzene Xylenes (ppm) (ppm) (ppm) Monitoring (ppm) (ppm) AW-4 9/26/90 6.5. ND ND ND ND ND ND ND - - 9/26/90 10.0 ND ND ND ND ND ND ND - - AW-5(B-4) 4/30191 6.5 ND ND ND ND ND ND - - - 4/30/91 11.5 ND ND `ND' ND ND ND= - - -_ AW-6(B-2) 4/30/91 6.5 ND 180 ND ND ND 0.038 - -- - 4/30/91 11.5 ND 5.4 ND ND ND ND - AW-7(B-3) 4/30/91 6.5 ND ND ND ND ND ND - - - AW-8(13-9) 5/1/91 5.5 ND ND ND ND ND ND - - - 5/1/91 10.5 ND ND ND ND ND ND - - - AW-9(B-10) 4/3/92 10.0 ND 1.8 ND ND ND ND - 420 -- "` 4/3/92 12.0 480 510 4.4 0.37 9.5 3.2 - - 4/3/92 22.5 -- - - - - - - 180 - AW-10 3/25/93 10.0 103 550 0.38 0.081 1.3 0.61 - - - 3/25/93 11.0 507 3,700 3.2 0.43 11 2.0 - - 3/25/93 12.5 - - - - - - - 670 - AW-11 3/25/93 10.0 250 600 1.4 2.4 1.9 3.2 - - - 3/25/93 12.0 ND 17 ND ND ND ND - - - 3/25/93 14.0 - - - - -- - - 210 3/25/93 15.0 - - -- - - - - 260 - 3/25/93 20.0 - - - - - - - 250 - 1 30-0136/hlstorical soil,2/12J97 ` Page 4 of 8 -