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1117--trte, r - r-" r", r"Wf I17119 r-" r.,--" r-" r-, r-" r." r-_„ r,., r--p I-" �P�IF�'" 4 � r Table 1 a Summary of Soil Sample Analysis Former Mobil Sulk 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) Monit -ring m m S13-7 *19.0 ND - ND ND ND ND - - - (con't) *24.0 ND - ND ND ND ND - - - S13-8 05.110194 11.5 430 . 6,700 1.2 0.90 0.76 16.5 ND ND ND ND ND ND - - - *19.0 ND... ND 0.010 0.043 ND ND _ *24.0 ND 1.0 ND 0.043 ND ND - - - *31.5 ND ND ND 0.016 ND ND - - - 34.0 ND ND ND ND ND ND -- - - SB-9 05/10/94 11.5 940 1,100 4.1 3.8 6.6 5.8 - - - 16.5 ND ND ND ND ND ND - - - *19.0 ND ND ND 0.005 ND ND - - - `21.5. ND ND ND 0.007 ND ND - -- - *24.0 ND ND ND 0.006 ND ND -- - - 26.5 ND ND ND ND ND ND - - - SB-10 5110194 6.5 200 1,900 ND 0.16 0.42 1.3 - - - 11.5 1.1 8.0 ND ND ND 0.0089 - - - 16.5 ND 2.1 ND ND ND ND - - - *19.0 ND 1.5 ND ND ND ND - - - *21.5 ND ND ND ND ND ND 3.6 - - *31.5 ND -- ND ND ND ND - - - SB-i 1 5110194 6.5 ND ND ND ND ND ND - - 11.5 ND ND ND ND ND ND - - -- 16.5 ND ND ND ND ND ND - - - *19.0 ND - ND ND ND ND - - - 21.5 ND ND ND ND ND ND - - 30-0136mistorical soil,2/12/97.. Page 7 of 8 -