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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.) 2AMW-12 (cont.) --- 6/2/04 0.38 15.0 ---0.56 4 <0.0005 0.00097 <0.0005 0.0005 --- 9/9/04 0.45 7.0 ---0.14 16 <0.0005 <0.0005 <0.0005 0.00166 --- 12/10/04 0.35 5.2 ---0.43 4 <0.0005 0.0075 <0.0005 0.00065 --- 2/25/05 0.33 7.6 ---0.25 4 <0.0005 0.00063 <0.0005 <0.001 --- 5/25/05 0.42 5.6 ---0.11 16 <0.0005 <0.0005 <0.0005 0.00053 --- 8/24/05 0.37 5.0 ---0.093 24 <0.0005 <0.0005 <0.0005 0.0011 --- 11/16/05 0.32 3.6 ---0.16 24 <0.0005 <0.0005 <0.0005 0.00056 --- 2/16/06 0.36 5.4 ---0.07 16 <0.0005 <0.0005 <0.0005 0.00166 --- 5/18/06 0.33 5.1 --- <0.05 <0.0005 <0.0005 <0.0005 0.00065 --- 8/16/06 0.42 5.6 ---0.15 28 <0.0005 <0.0005 <0.0005 <0.0015 ---11/16/2006 20 0.33 1.8 --- <0.05 <0.0005 <0.0005 <0.0005 0.00064 J --- 2/9/07 0.34 3.8 --- <0.05 <0.0005 <0.0005 <0.0005 0.00093 --- 5/8/07 0.28 3.9 ---0.14 28 <0.0005 <0.0005 <0.0005 0.00086 J, 34 --- 7/5/07 0.36 2.0 --- <0.05 <0.0005 <0.0005 <0.0005 0.00072 J --- 10/9/07 0.34 4.7 --- <0.05 <0.0005 <0.0005 <0.0005 0.00076 J --- 1/24/08 0.27 2.9 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/22/08 0.30 5.3 --- <0.05 <0.0005 <0.0005 <0.0005 0.00085 J --- 7/24/08 0.33 6.0 --- <0.05 <0.0005 <0.0005 <0.0005 0.00083 --- 10/22/08 0.33 4.0 --- <0.05 <0.0005 <0.0005 <0.0005 0.0012 --- 1/21/09 0.32 4.3 ---0.062 28 <0.0005 <0.0005 <0.0005 0.00051 --- 4/21/09 0.26 3.8 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/29/09 0.16 4.7 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/21/09 0.18 4.7 ---0.092 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/22/10 0.17 2.8 --- <0.05 <0.0005 26 <0.0005 <0.0005 <0.0005 --- 4/21/10 0.11 3.5 ---0.081 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/10 0.22 6.1 ---0.071 37 <0.0005 <0.0005 <0.0005 0.00062 --- 10/20/10 0.13 3.3 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 ---1/26/11 0.097 2.1 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 4/18/11 --- 7/19/11 0.17 2.2 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/21/11 0.13 1.7 --- 0.078 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/19/12 0.093 1.8 ---<0.05 <0.0005 11 <0.0005 <0.0005 <0.0005 2AMW-13 --- 10/14/99 130 11.00 ---0.59 15 27 3.2 16 --- 5/20/02 140 26 (11)--- <0.3 (<0.6)13 23 2.6 13.4 (FD) --- 5/20/02 140 33 (13)--- <0.3 (<0.6)15 27 2.8 13 --- 9/30/02 190 41 (30)--- <0.5 (<0.1)20 32 4.4 20.5 --- 12/5/02 97 12 (7.8)--- <0.1 (<0.1)10 17 2.2 11 --- 3/5/03 170 <11 ---0.154 19 29 3.5 16.7 --- 5/8/03 170 15.00 ---0.69 4 19 31 3.5 12.47 --- 8/21/03 190 12.00 ---0.21 4 20 28 3.7 19.3 --- 11/14/03 170 26.00 ---0.91 4 18 31 3.6 16.8 --- 2/20/04 130 28.00 --1.2 16 14 21 2.6 12.2 --- 6/3/04 140 28 14 --1.4 4, 14 13 24 2.2 12.4 --- 9/9/04 150 14.00 --0.44 4 17 28 3.3 13.9 --- 12/10/04 210 9.00 --0.33 4 14 26 4.5 21.3 --- 2/25/05 99 12.00 --0.49 4 9.3 15 1.8 8.9 --- 5/26/05 150 12.00 --0.300 24 16 25 2.5 13.8 --- 8/24/05 140 8.80 --0.13 24 14 23 2.4 12.4 --- 11/16/05 140 <12.00 9 --0.71 24 15 22 3.0 14.2 --- 2/16/06 130 <8.00 9 --0.076 16 13 22 3.0 14.1 Well not sampled due to inaccessibility I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 8 of 67