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TABLE 2 Results of Soil Sampling for Over-excavation PG&E Lathrop Dehydrator Station Concentrations reported in milligrams per kilogram[mg/kg] Depth of Sample ID Sample Sample TPH-g TPH-d TPH-mo Ethyl- Xylenes Sample ID in Fig. 3 (feet) Date (C6-C10) (C10-C24) (C24-C36) Benzene Toluene benzene (total) 90B2-12 2 12 04/14/2004 ND < 1250 800 ND< 500 ND< 25 ND< 25 ND<25 ND<25 90SW3-9 3 9 1 04/14/2004 ND< 2500 2900 ND< 500 ND< 50 ND< 50 ND< 50 ND< 50 90SW5-9 (8)* 5 8 04/14/2004 ND<2500 2600 ND< 500 ND < 50 ND < 50 ND < 50 ND < 50 90B6-11 6 11 04/14/2004 ND<2500 360 ND< 500 ND< 50 ND< 50 ND< 50 ND< 50 90B9-11 9 11 04/14/2004 ND<2500 320 ND< 500 ND< 50 ND< 50 ND< 50 ND< 50 90SW14-8.5 14 8.5 04/15/2004 ** ** ** ** ** ** ** 90SW23-10 23 10 04/15/2004 *** *** *** *** *** *** *** Notes: ND = compound was not detected ("<#"= laboratory reporting limit) The sample ID indicates the location from where sample is collected: B= Bottom wall sample, SW=Side wall sample Numbers in bold indicate that the compound was detected above laboratory reporting limits. Field notes identify this sample as 90SW5-8; however, it is recorded on the chain-of-custody form as 90SW5-9. All results from the laboratory for this sample are reported under 90SW5-9. " Sample not analyzed because results of neighboring sample 90SW13-9 (collected at a greater depth) showed non-detect for TPH-g/BTEX and TPH-d at 92 mg/kg. '* Sample which was collected at 10 ft. bgs was not analyzed because field decision was made to excavate enitre area to 13 feet below ground surface (where contamination was not expected).