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a Table 1 Summary of Results of Soil Sampling California Department of Transportation Shop 10 Facility 1603 B Street Stockton, California Alton Geoscience Project No 42-0014 Concentrations parts per million [ ml Page oe 1 SAMPLE DATE OF DEPTH TO TPH-G TPH-D B T E X ANALYTICAL ID SAMPLING/ SAMPLE {80201 (80201 (80201 (80201 LAB MONITORING (IN FEET) 602) 602) 602) 602) AB-1 03 2792 16, ND<1 ND<1 NDC 005 ND< 005 NO< 005 ND< 005 SEG AB-1 03-27-92 36' ND<1 ND<1 NO< 005 ND< 005 ND< 005 ND< 005 SEQ AB-1 03-2792 56' ND<1 ND<1 ND< 005 ND< 005 ND< 005 NO< 005 SEQ AB 1 03 27-92 71' ND<1 ND<1 ND< 005 ND< 005 ND< 005 ND< 005 SEQ A8 2 03-27-92 16' ND<1 ND<1 ND< 005 ND< 005 ND< 005 ND< 005 SEQ AB 2 03 27-92 31' ND<1 NO<1 ND< 005 ND< 005 NO< 005 ND< 005 SEQ AB-2 03-27-92 56' ND<1 ND<1 12 ND< 005 ND< 005 ND< 005 SEQ MW 10 03-30-92 21' ND<l ND<1 ND< 005 ND< 005 ND< 005 ND< 005 SEQ MW-10 03-30-92 46' 270 12 4 4 17 5 5 30 SEQ MW-10 0330-92 56' 4 0 ND<1 81 62 055 32 SEQ MW-10 03-30-92 71' ND<1 ND<1 ND< 005 NO< 005 ND< 005 ND< 005 SEQ MW-11 0330-92 16' ND<1 ND<1 ND< 005 ND< 005 ND< 005 ND< 005 SEQ MW 11 03-30-92 31' ND<1 ND<1 NO< 005 ND< 005 ND< 005 ND< 005 SEQ MW-1 1 0330-92 56' ND<1 ND<1 ND< 005 ND< 005 ND< 055 NO< 005 SEQ MW-11 03-30-92 66' ND<1 ND<1 ND< 005 ND< 005 NO< 005 ND< 005 SEQ MW 12 0330-92 16' ND<1 ND<1 ND< 005 ND< 005 ND< 005 ND< 005 SEQ MW-12 03-30-92 36' ND<1 ND<1 ND< 005 NO< 005 ND< 005 ND< 005 SEQ MW-12 03 30-92 56' ND<1 ND<1 ND< 005 ND< 005 ND< 005 ND< 005 SEQ MW-12 03 30 92 71' ND<1 ND<1 0098 ND< 005 ND< 005 ND< 005 SEQ EXPLANATION OF ABBREVIATIONS TPH-G total petroleum hydrocarbons as gasoline ND< not detected at method detection limit shown (EPA method 8015 modified) SEQ Sequoia Analytical TPH-D total petroleum hydrocarbons as diesel --- not applicabletnot available (EPA method 8015 modified) (EPA method 55209 B benzene (EPA mehtod 8020) T toluene (EPA method 8020) E ethylbernzane (EPA method 8020) X total xylenes (EPA method 8020) 07-02-92 DJ I