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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.) MW-9 (cont.) --- 5/26/05 4.0 4.4 ---0.091 24 0.22 0.0064 0.0034 0.0085 --- 8/24/05 3.5 4.6 ---0.13 24 0.19 0.0052 0.0035 0.0075 --- 11/16/05 2.6 2.1 --- <0.05 0.16 0.0048 0.0023 0.0071 --- 2/14/06 3.6 2.4 --- <0.05 0.12 0.0047 0.0024 0.0084 --- 5/17/06 3.5 4.5 ---0.078 16 0.19 0.0073 0.0076 0.0100 --- 8/16/06 4.0 2.5 ---0.054 28 0.24 0.0077 0.0037 0.0095 --- 11/16/06 3.6 2.5 --- <0.05 0.16 0.0052 0.0022 0.0076 --- 2/8/07 3.5 6.4 --- <0.05 0.16 0.0052 0.0032 0.0081 --- 5/9/07 2.9 6.0 ---0.19 28 0.15 0.0044 0.0026 0.0068 --- 7/5/07 2.7 5.8 ---0.16 37 0.13 0.0043 0.0028 0.0073 --- 10/9/07 2.7 6.7 ---0.23 28 0.12 0.0039 0.0022 0.0063 --- 1/24/08 2.5 2.6 ---0.06 37 0.068 11 0.0038 0.0031 0.0072 --- 4/23/08 2.0 3.8 ---0.29 0.089 0.0029 0.0024 0.0055 --- 7/24/08 2.6 3.3 ---0.12 0.071 0.0037 0.0018 0.0068 --- 10/23/08 2.8 2.6 ---0.067 37 0.054 0.0024 0.0025 0.0060 --- 1/22/09 2.1 3.8 ---0.24 32 0.036 0.0018 0.0017 0.0057 --- 4/23/09 1.8 3.3 ---0.25 37 0.039 0.0019 0.0018 0.0048 --- 7/30/09 1.5 3.5 ---0.2 32 0.025 0.001 0.00087 0.0033 --- 10/21/09 1.5 4.6 ---0.340 0.019 0.00081 <0.0005 0.003 --- 1/22/10 1.5 2.9 --- 0.2 0.014 26 0.00066 <0.0005 0.00236 --- 4/22/10 2.0 3.6 ---0.24 37 0.042 0.00096 0.0012 0.0028 --- 7/22/10 1.8 3.7 ---0.24 37 0.035 0.00098 0.0012 0.0027 --- 10/21/10 1.8 4.5 --- 0.30 0.025 0.00095 0.00064 0.0026 --- 1/27/11 2.2 2.8 ---0.087 37 0.054 0.0014 0.0012 0.0034 --- 4/21/11 1.8 3.2 ---0.18 37 0.046 0.0014 0.00057 0.0031 --- 7/21/11 1.7 3.5 ---0.12 36 0.042 0.0013 <0.0005 0.00263 --- 10/20/11 1.4 2.6 ---0.10 42 0.058 0.0016 0.00057 0.00264 --- 1/20/12 1.3 2.9 ---0.15 42 0.038 0.0013 <0.0005 0.00259 MW-10 --- 10/18/96 27 2.20 --- <0.20 0.92 0.17 2.6 12 --- 1/19/99 9.13 --- --- ---0.309 (0.276)* 0.0212 (0.0192)* 0.621 (0.658)* 1.23 (1.19)* --- 2/27/99 ---9.87 --- --- --- --- --- --- --- 7/19/02 134,6 304,5 (17)4,5 ---4.44,5 (2.4)4,5 0.067 <0.05 0.69 2.15 --- 9/30/02 4.3 53 (36)---<0.5 (0.24)0.0081 <0.001 0.12 0.29 --- 12/5/02 8.7 12 (6.1)--- <0.1 (<0.1)0.052 0.0021 0.58 1.117 --- 3/5/03 8.3 9.10 ---0.54 0.046 <0.0025 0.53 1.092 --- 5/8/03 7.7 11.00 --1.44 0.034 <0.0015 0.43 0.669 --- 8/20/03 2.4 23.00 --2.5 4 0.0018 <0.0005 0.049 0.043 --- 11/13/03 4.4 28.00 --3.8 4 0.0080 <0.0005 0.260 0.20095 --- 6/1/04 --- 9/7/04 --- 12/10/04 --- 2/25/05 4.3 39.00 --5.7 4 0.005 0.001 0.25 0.292 --- 5/25/05 --- 8/24/05 --- 11/14/05 --- 2/14/06 --- 5/15/06 --- 8/14/06 Not sampled due to SPH (Sheen) Not sampled due to Sheen Not sampled due to SPH Not sampled due to Sheen Not sampled due to SPH Not sampled due to SPH Not sampled due to SPH Not sampled due to SPH Not sampled due to Sheen I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 6 of 67