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Table 4 Groundwater Analytical Data - Total Petroleum Hydrocarbons and BTEX South Shore Parcels - Parcel 2A and Adjacent Areas West Weber Avenue and North Lincoln Street Stockton, California Depth Ethyl- Sample (feet, Date TPHg TPHd TPHk TPHo Benzene Toluene benzene Xylenes ID bgs) Sampled (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) A Zone Wells - Area 2A/2B and Adjacent Areas (cont.) DP-8-U 16-20 9/01 <0.05 <0.076 <0.076 <0.76 <0.001 <0.001 <0.001 <0.001 DP-8-L 25-30 9/01 <0.05 0.07 <0.064 <0.64 <0.001 <0.001 <0.001 <0.001 DP-9-U 20-24 9/01 <0.05 <0.05 <0.05 <0.5 <0.001 <0.001 <0.001 <0.001 DP-9-L 35-40 9/01 <0.05 <0.063 <0.063 <0.63 <0.001 <0.001 <0.001 <0.001 DP-10-U 24-26 9/01 0.079 0.11 <0.071 <0.71 <0.001 <0.001 <0.001 <0.001 DP-10-L 38-43 9/01 4.7 0.17 <0.05 <0.5 <0.2 <0.2 <0.2 3.2 DP-11-U 24-26 9/01 <0.05 <0.06 <0.06 <0.6 <0.001 <0.001 <0.001 <0.001 DP-11-L 37-42 9/01 <0.05 <0.05 <0.05 <0.5 <0.001 <0.001 <0.001 <0.001 DP-12-U 24-26 5/02 <0.05 0.0644,6 (<0.05)--- <0.3 (<0.3) <0.005 <0.005 <0.005 <0.005 DP-12-L 43-46 5/02 <0.05 <0.05 (<0.05) ---0.824,7 (<0.3)<0.005 <0.005 <0.005 <0.005 DP-13-U 24-26 5/02 6.3 274,5 (18)4,5 --- <1.5 (<1.5)0.018 0.0072 <0.005 0.0137 DP-13-L 40-43 5/02 0.97 0.654,5 (0.15)4,5 --- <0.3 (<0.3)0.023 <0.005 <0.005 <0.005 DP-14-U 24-26 5/02 7.74 2.44,5 (0.46)4,5 --- <0.6(<0.3) <0.005 <0.005 <0.005 <0.005 DP-14-L 37-40 5/02 <0.05 0.0854 (<0.05)--- <0.3 (<0.3) <0.005 <0.005 <0.005 <0.005 DP-15-U 24-26 5/02 0.464,6 8.7 (6.1)--- <0.6 (<0.3) <0.005 <0.005 <0.005 <0.005 DP-15-L 40-43 5/02 <0.05 0.214 (0.059)4 ---<0.3 (<0.3)<0.005 <0.005 <0.005 <0.005 DP-16-U 20-24 5/02 <0.05 0.234,6 (<0.05)---0.55 (<0.3)<0.005 <0.005 <0.005 <0.005 DP-16-L 45-48 5/02 <0.05 0.164 (<0.05)---0.384,6 (<0.3)<0.0005 <0.0005 <0.0005 <0.0005 DP-17-U 18-22 5/02 <0.05 0.134,6 (<0.05)--- <0.3 (<0.3) <0.005 <0.005 <0.005 <0.005 DP-17 L 44-47 5/02 <0.05 0.164 (<0.05)--- <0.3 (<0.3) <0.0005 <0.0005 <0.0005 <0.0005 DP-18-U 20-24 5/02 <0.05 0.0864,6 (<0.05)---0.884,6 (0.6)6 <0.005 <0.005 <0.005 <0.005 DP-18-L 40-43 5/02 <0.05 0.794 (<0.05)--- <0.3 (<0.3) <0.0005 <0.0005 <0.0005 <0.0005 DP-19-U 24-26 5/02 <0.05 0.514,5,6 (0.23)4,5,6 ---0.86 (0.35)6 <0.005 <0.005 <0.005 <0.005 DP-19-L 46-49 5/02 <0.05 0.256 (<0.05)--- <0.3 (<0.3) <0.0005 <0.0005 <0.0005 <0.0005 DP-20-U 18-22 5/02 ---0.0644 (<0.05)--- <0.3 (<0.3) --- --- --- --- 18-22 (FD)5/02 ---0.0884 (<0.05)--- <0.3 (<0.3) --- --- --- --- DP-21-U 20-24 5/02 ---0.124 (<0.05)--- <0.3 (<0.3) --- --- --- --- 20-24 (FD)5/02 ---0.0874 (<0.05)--- <0.3 (<0.3) --- --- --- --- 3MW-1 --- 10/14/99 0.07 <0.05 --- <0.05 0.00095 0.0049 0.0015 0.0075 I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 30 of 67