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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-19 (cont.) --- 2/16/06 13 <1.50 9 --- <0.05 3.0 0.120 26 0.31 0.176 --- 5/15/06 --- 8/16/06 15 1.9 ---0.09 28 3.0 0.07 0.19 0.088 --- 11/14/06 --- 2/5/07 --- 5/7/07 --- 7/3/07 --- 10/8/07 --- 1/21/08 Not sampled due to Sheen --- 4/23/08 10 2.80 ---0.098 2.7 11 0.059 0.083 0.068 --- 7/24/08 10 2.30 ---0.094 2.4 0.064 0.16 0.073 --- 10/20/08 --- 1/23/09 11 2.20 ---0.054 2.3 0.082 0.20 0.094 --- 4/20/09 --- 7/27/09 --- 10/19/09 --- 1/20/10 10 4.2 --- 0.088 1.8 0.052 0.065 0.064 --- 4/19/10 --- 7/19/10 --- 10/18/10 ---1/24/11 ---4/18/11 ---7/18/11 --- 10/17/11 ---1/17/12 MW-20 --- 4/15/03 1.0 31.0 ---0.062 4 <0.0005 <0.0005 <0.0005 <0.001 --- 5/8/03 0.8 44.0 ---0.5 4 <0.0005 <0.0005 <0.0005 <0.001 --- 8/21/03 0.97 3.9 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 11/13/03 0.60 23.0 ---0.260 4 <0.0005 <0.0005 <0.0005 <0.001 --- 2/20/04 0.46 16.0 ---0.14 16 0.00067 <0.0005 <0.0005 <0.001 --- 6/2/04 0.57 14.0 ---0.16 16 <0.0005 <0.0005 <0.0005 <0.001 --- 9/9/04 0.65 5.4 ---0.071 16 0.00052 0.00052 <0.0005 <0.001 --- 12/9/04 0.62 6.7 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 2/25/05 0.61 5.2 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 5/24/05 0.84 8.4 ---0.067 24 <0.0005 <0.0005 <0.0005 <0.001 --- 8/24/05 0.50 3.0 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 11/16/05 0.48 5.5 --- <0.05 <0.0005 0.00052 <0.0005 <0.0015 --- 2/16/06 0.46 2.3 --- <0.05 <0.0005 <0.0005 <0.0005 0.00064 --- 5/19/06 0.48 2.4 --- <0.05 <0.0005 0.00055 <0.0005 <0.001 --- 8/16/06 0.41 11 ---0.1 28 <0.0005 0.0013 <0.0005 <0.0015 --- 11/16/06 0.58 2.4 --- <0.05 <0.0005 0.00057 <0.0005 <0.001 30 --- 2/7/07 0.52 2.6 --- <0.05 <0.0005 0.00054 <0.0005 <0.001 --- 5/9/07 0.60 2.8 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/3/07 --- 10/8/07 --- 1/25/08 0.49 2.1 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/23/08 0.49 2.3 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/24/08 0.50 3.2 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 10/22/08 0.50 2.8 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled - no access agreement Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled - no access agreement Not sampled -no access agreement 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 12 of 67