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Table 6 Groundwater Analytical Data - SVOCs South Shore Parcels - Parcel 2A and Adjacent Areas West Weber Avenue and North Lincoln Street Stockton, California Benzo- Benzo- Benzo- Benzo- Ideno- 1-methyl- 2-methyl- Bis(2-ethyl- 2,4-Di- 3/4- Anth- (a)anth- (b)fluor- (k)fluor- Benzo(a)- (g,h,i) Chry- Fluor- Fluor- (1,2,3-c,d)- naph- naph- Naph- Phen- hexyl)- 2-methyl- methyl- methyl- Diethyl Other Sample Date racene racene anthene anthene pyrene perylene sene anthene ene pyrene thalene thalene thalene anthrene Pyrene phthalate Phenol phenol phenol phthalate SVOCs ID (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) Analyzed by EPA Method 8270 Explanation (cont.): 1 = Phenol detected at 0.063 mg/l. 2 = Collected by Clayton Group Associates.11 = Phenol detected at 0.014 mg/l. 3 = Phenol detected at 0.057 mg/l.12 = Bis(2-Chloroethyl) Ether detected at 0.024 mg/l. 4 = Phenol detected at 0.037 mg/l.13 = Phenol detected at 0.012 mg/l. 5 = Phenol detected at 0.025 mg/l.14 = Phenol detected at 0.180 mg/l. 15 = Phenol detected at 0.025 mg/l. 16 = Date sample was prepared. 17 = The analyte concentration was reported from analysis of the diluted sample. 18 = Dilution factor of 10. 19 = Phenol detected at 0.057 mg/l. 20 = Phenol detected at 0.087 mg/l. 21 = Phenol detected at 0.024 mg/l. 22 = The relative standard deviation of the calibration curve response factors exceeds the control limit for the analyte 2-Naphthylamine. 23 = The relative standard deviation of the calibration curve response factors exceeds the control limit for the analyte N-Nitrosodimethylamine. 24 = The Continuing Calibration Verification (CCV) recovery is not within established control limits for the analyte 2-Naphthylamine. 25 = The Continuing Calibration Verification (CCV) recovery is not within established control limits for the analyte N-Nitrosodimethylamine. 26 = Phenol detected at 0.018 mg/l. 27 = Collected by Wallace Kuhl. 28 = Phenol detected at 0.039 mg/l. 29 = Phenol detected at 0.034 mg/l. 30 = Phenol detected at 0.045 mg/l. 31 = Di-n-Octyl Phthalate detected at 0.11 mg/l. 32 = Di-n-Octyl Phthalate detected at 0.022 mg/l. 33 = Phenol detected at 0.016 mg/l. 34 = 4-Chlorophenyl-phenyl ether detected at 0.012 mg/l. 35 = Phenol detected at 0.011 mg/l. 38 = Wallace-Kuhl did not sample due to ongoing negotiations with the City and the Regional Board. 39 = Dimethyl Phthalate detected at 0.013 mg/l. 40 = Dimethyl Phthalate detected at 0.022 mg/l. 41 = Benzoic Acid detected at 4.1 mg/l. 42 = Wells destroyed in November 2008 as part of the Unocal excavation activities by Treadwell and Rollo. 43 = 2,6-Dinitrotoluene detected at 0.018 mg/l. 44 = Phenol detected at 0.042 mg/l. 45 = Phenol detected at 0.013 mg/l. 46 = SVOC sample bottles arrived broken to the laboratory; therefore, SVOCs were not analyzed. 36 = Matrix Spike/Matrix Spike Duplicate results for Chlorobenzene were outside of control limits. This may indicate a bias for the sample that was spiked. Since the LCS recoveries were within control limits, no data are flagged. 10 = Phenol detected at 0.089 mg/l. 37 = Matrix Spike/Matrix Spike Duplicate results were affected by the analyte concentrations already present in the un-spiked sample. 7 = Surrogate spike compound (2-Fluorobiphenyl) was out of control due to matrix interference. The associated method blank surrogate spike compound was in control and, therefore, the sample data was reported without further clarification. 8 = Surrogate spike compound (Phenol-d6) was out of control due to matrix interference. The associated method blank surrogate spike compound was in control and, therefore, the sample data was reported without further clarification. 9 = Samples collected by Clayton Group Services. 6 = Surrogate spike compound (p-Terphenyl-d14) was out of control due to matrix interference. The associated method blank surrogate spike compound was in control and, therefore, the sample data was reported without further clarification. I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 53 of 53