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Table 4 <br />Groundwater Analytical Data - Total Petroleum Hydrocarbons and BTEX <br />South Shore Parcels - Parcel 2A and Adjacent Areas <br />West Weber Avenue and North Lincoln Street <br />Stockton, California <br />Depth Ethyl- <br />Sample (feet, Date TPHg TPHd TPHk TPHo Benzene Toluene benzene Xylenes <br />ID bgs) Sampled (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) <br />B Zone Wells - Areas 2A/2B And Adjacent Areas (cont.) <br />MW-52 (cont.)---1/24/11 <br />---4/18/11 <br />---7/18/11 <br />--- 10/17/11 <br />---1/17/12 <br />MW-53 --- 5/26/05 3.5 1.6 ---0.070 24 0.0038 0.0031 0.0038 0.0024 <br />--- 8/24/05 5.2 <2.0 9 ---0.19 24 0.0018 0.0013 0.0022 0.0011 <br />--- 11/16/05 4.2 <3.0 9 ---0.12 0.002 0.0018 0.0037 0.0015 <br />--- 2/16/06 3.6 <2.0 9 ---0.14 16 0.0025 0.0041 0.0059 0.0041 <br />--- 5/15/06 <br />--- 8/16/06 3.9 1.5 ---0.093 28 <0.0009 0.0013 0.0013 0.0034 <br />--- 11/16/06 4.7 <1.50 9 ---<0.05 0.004 0.0077 0.0084 0.0085 <br />--- 2/9/07 3.7 1.6 ---0.072 31 0.0038 0.0069 0.0083 0.0083 <br />--- 5/9/07 3.2 <2.0 9 ---0.17 31 0.0062 0.0095 0.011 0.01 <br />--- 7/5/07 3.5 <1.5 9 ---0.053 37 0.0052 0.0069 0.0084 0.0081 <br />--- 10/9/07 3.0 <1.5 9 ---0.12 42 0.0079 0.0095 0.012 0.011 <br />--- 1/25/08 3.2 <1.5 9 --- <0.05 0.0023 0.0031 0.0041 0.0036 <br />--- 4/23/08 2.5 <1.5 9 ---0.076 36 0.0094 0.01 0.012 0.011 <br />--- 7/24/08 2.6 <2.0 9 ---0.22 36 0.0089 0.0089 0.010 0.010 <br />--- 10/21/08 2.3 <1.5 9 ---0.39 36 0.0034 0.0032 0.004 0.004 <br />--- 1/19/09 <br />MW-56 --- 10/22/08 0.094 0.32 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 <br />--- 1/23/09 0.057 0.25 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 <br />--- 4/23/09 0.057 0.26 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 <br />--- 7/29/09 <0.05 0.24 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 10/20/09 <0.05 0.58 41 ---0.12 36 <0.0005 11 <0.0005 <0.0005 0.00061 <br />--- 1/20/10 0.055 0.42 ---0.19 36 0.00058 0.00058 <0.0005 0.00068 <br />--- 4/20/10 0.058 0.46 ---0.059 37 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 7/20/10 <0.05 0.37 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 10/19/10 0.05 0.29 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 <br />---1/25/11 <0.05 0.18 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 4/19/11 <0.05 0.53 ---0.061 36 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 7/19/11 <0.05 0.15 ---0.069 36 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 10/18/11 0.061 0.36 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 1/19/12 <0.05 0.31 ---<0.05 <0.0005 11 <0.0005 <0.0005 <0.0005 <br />MW-57 --- 10/22/08 0.085 0.56 41 ---0.16 36 0.0013 <0.0005 <0.0005 0.0012 <br />--- 1/21/09 <0.05 0.086 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 <br />--- 4/22/09 <0.05 0.079 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 <br />--- 7/29/09 <0.05 0.051 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 10/21/09 <0.05 0.25 10,41 ---0.056 10,37 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 1/20/10 <0.05 0.16 47 ---0.079 36 <0.0005 <0.0005 <0.0005 0.00051 <br />--- 4/20/10 <0.05 0.053 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 7/20/10 <0.05 0.18 ---0.063 37 <0.0005 <0.0005 <0.0005 <0.0005 <br />--- 10/19/10 <0.05 0.15 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 <br />Not Sampled due to Sheen <br />Not Sampled due to Sheen <br />Well abandoned due to Unocal Excavation 51 <br />Not Sampled due to Sheen <br />Not Sampled due to Sheen <br />Not Sampled due to Sheen <br />Not Sampled due to Sheen <br />I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 45 of 67