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Table 1 Soil Sample Results Pacific Gas and Electric McDonald Island Compressor Station C-51 Tank Site Investigation and Soil Removal Sample Sample Parameters Primary/ Depth Soil Boring Contingency (feet bgs) TPH-g TPH-d TPH-mo Benzene Toluene Ethylbenzene Xylenes Moisture RWQCB ESL for Shallow Soil with Residential Land Use 83 83 83 0.044 2.9 2.3 2.3 -- USEPA RSL for Residential Soil -- -- -- 1.1 5000 5.4 630 - Units mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg % 1.5-2 0.55U 5.5U 28U 0.0055U 0.0055U 0.0055U 0.011 U 9.80 C51-SB1 Primary 3.5-4 0.57U 37 77 0.0057U 0.0057U 0.0057U 0.011 U 11.9 5.5-6 0.55U 5.5U 27U 0.0055U 0.0055U 0.0055U 0.011 U 8.40 7.5-8 0.58U 5.8U 29U 0.0058U 0.0058U 0.0058U 0.012U 13.6 1.5-2 0.57U 12 29U 0.0057U 0.0057U 0.0057U 0.011 U 12.3 C51-S132 Primary 3.5-4 0.59U 5.9U 29U 0.0059U 0.0059U 0.0059U 0.012U 14.8 5.5-6 0.57U 36 210 0.0057U 0.0057U 0.0057U 0.011 U 12.7 7.5-8 0.58U 14 77 0.0058U 0.0058U 0.0058U 0.012U 13.6 1.5-2 0.54U 5AU 27U 0.0054U 0.0054U 0.0054U 0.011 U 7.40 C51-SB3 Primary 3.5-4 0.58U 6.2 29U 0.0058U 0.0058U 0.0058U 0.012U 14.3 5.5-6 0.54U 5AU 27U 0.0054U 0.0054U 0.0054U 0.011 U 7.00 7.5- 8 0.58U 6.4 29U 0.0058U 0.0058U 0.0058U 0.012U 13.7 1.5-2 0.63U 6.3U 32U 0.0063U 0.0063U 0.0063U 0.013U 21.2 C51-SB4 Primary 3.5-4 0.56U 5.6U 28U 0.0056U 0.0056U 0.0056U 0.011U 10.0 5.5-6 990 8,200 5,000 0.0057U 0.0057U 0.0057U 0.011 U 11.6 7.5-8 1,000 7,000 4,000 0.0055U 0.0055U 0.0055U 0.011 U 9.60 1.5-2 0.58U 9.7 41 0.0058U 0.0058U 0.0058U 0.012U 13.9 C51-SB5 Primary 3.5-4 0.54U 5AU 27U 0.0054U 0.0054U 0.0054U 0.011U 7.80 5.5-6 0.65U 6.5U 33U 0.0065U 0.0065U 0.0065U 0.013U 23.5 7.5-8 0.56U 5.6U 28U 0.0056U 0.0056U 0.0056U 0.011 U 11.5 2 -2.5 0.64U 6AU 32U 0.0064U 0.0064U 0.0064U 0.013U 21.5 C51-SB6 Primary 3.5-4 0.58U 5.8U 29U 0.0058U 0.0058U 0.0058U 0.012U 13.7 5.5-6 0.55U 5.5U 28U 0.0055U 0.0055U 0.0055U 0.011 U 9.10 7.5- 8 0.65U 10 33U 0.0065U 0.0065U 0.0065U 0.013U 23.4 1.5-2 0.63U 6.3U 31 U 0.0063U I 0.0063U 0.0063U 0.0131.1 20.6 C51-SB7 Primary 3.5-4 0.571_1 5.7U 28U 0.0057U 0.0057U 0.0057U 0.011 U 11.7 5.5-6 0.63U 6.3U 31U 0.0063U 0.0063U 0.0063U 0.013U 20.6 7.5- 8 0.56U 5.6U 28U 0.0056U 0.0056U 0.0056U 0.011 U 11.4 1.5- 2 0.61U 6.1U 31U 0.0061U 0.0061U 0.0061U 0.012U 18.3 C51-SB8 Primary 3.5-4 0.60U 6.OU 30U 0.0060U 0.0060U 0.0060U 0.012U 16.8 5.5-6 0.58U 5.8U 29U 0.0058U I 0.0058U 0.0058U 0.012U 14.4 7.5-8 0.58U 5.8U 29U 0.0058U 0.0058U 0.0058U 0.012U 13.8 1.5-2 0.62U 6.2U 31 U 0.0062U 0.0062U 0.0062U 0.012U 19.8 C51-SB9 Primary 3.5-4 0.64U 6AU 32U 0.0064U 0.0064U 0.0064U 0.013U 22.1 5.5-6 0.55U 5.5U 27U 0.0055U 0.0055U 0.0055U 0.011 U 8.60 7.5- 8 0.57U 5.7U 28U 0.0057U 0.0057U 0.0057U 0.011 U 12.2 1.5-2 0.64U 17 32U 0.0064U 0.0064U 0.0064U 0.013U 22.2 C51-SB10 Primary 3.5-4 0.54U 21 27U 0.0054U 0.0054U 0.0054U 0.011 U 7.80 5.5-6 0.66U 6.6U 33U 0.0066U 0.0066U 0.0066U 0.013U 24.0 7.5-8 0.58U I 5.8U 29U 0.0058U 0.0058U 0.0058U 0.012U 14.4 1.5-2 0.630 1 65 58 0.0063U 0.0063U 0.0063U 0.013U 21.1 C51-SB 11 Primary 3.5-4 0.56U 5.6U 28U 0.0056U 0.0056U 0.0056U 0.011U 11.3 5.5-6 40.59U 5.9U 30U 0.0059U 0.0059U 0.0059U 0.012U 15.8 7.5-8 U 6.2U 31 U 0.0062U 0.0062U 0.0062U 0.012U 19.3 1.5-2 U 10 31U 0.0062U 0.0062U 0.0062U 0.012U 20.0 C51-SB12 Primary 3.5-4 U 6.2U 31U 0.0062U 0.0062U 0.0062U 0.012U 19.0 5.5-6 U 5.6U 28U 0.0056U 0.0056U 0.0056U 0.011 U 10.9 7.5-8 U 5.8U 29U 0.0058U 0.0058U 0.0058U 0.012U 13.8 Table 1 MDI Sample Results.xls ARCADIS Page 1 of 2