ARCHIVED REPORTS_THIRD QUARTER 2011 SITE STATUS, REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT

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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 t I Sampled (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) A Zone Wells-Area 2A/2B and Adjacent Areas(cont.) MW-11 (cont.) --- 2/14/06 0.088 0.34 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 5/15/06 0.09 0.59 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 8/14/06 0.098 0.68 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 11/14/06 0.088 0.87 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 2/5/07 0.13 1.0 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 5/7/07 0.11 0.97 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 7/2/07 0.056 0.68 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 10/8/07 0.075 0.64 --- 0.052 36 <0.0005 <0.0005 <0.0005 <0.0015 --- 1/21/08 0.089 0.59 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 4/21/08 0.068 0.82 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 7/21/08 Well not sampled 45 --- 10/20/08 Well not sampled 45 --- 1/19/09 Well abandoned due to Unocal Excavation 5' 2AMW-12 --- 10/14/99 1.2 3.00 --- <0.5 0.0046 0.0085 0.00064 0.0092 --- 5/20/02 0.714 11(5.2) --- 0.834'5(<0.3) <0.005 <0.005 <0.005 <0.005 --- 9/30/02 0.42 11(10) --- <0.1 (<0.1) <0.0005 <0.0005 0.0017 0.006 --- 12/5/02 0.4 4.7(2.5) --- <0.1 (<0.1) <0.0005 0.00098 <0.0005 0.00245 --- 3/5/03 0.32 3.4 --- 0.0984 <0.0005 0.00053 <0.0005 0.0011 --- 5/8/03 0.35 8.4 --- 0.184 <0.0005 <0.0005 <0.0005 0.0011 --- 8/20/03 0.47 8.6 --- 0.24 4 <0.0005 0.00054 <0.0005 0.0013 --- 11/12/03 0.35 12.0 --- 0.374 <0.0005 <0.0005 <0.0005 0.0011 --- 2/20/04 0.40 12.0 --- 0.3516 <0.0005 0.00062 <0.0005 0.0013 --- 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 --- 0.1416 <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 --- 0.11'6 <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 --- 0.0716 <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 --- 0.1528 <0.0005 <0.0005 <0.0005 <0.0015 --- 11/16/2006 21 0.33 1.8 --- <0.05 <0.0005 <0.0005 <0.0005 0.00064' --- 2/9/07 0.34 3.8 --- <0.05 <0.0005 <0.0005 <0.0005 0.00093 --- 5/8/07 0.28 3.9 --- 0.1428 <0.0005 <0.0005 <0.0005 0.00086 1,34 --- 7/5/07 0.36 2.0 --- <0.05 <0.0005 <0.0005 <0.0005 0.000721 --- 10/9/07 0.34 4.7 --- <0.05 <0.0005 <0.0005 <0.0005 0.00076' Stantec I:\Tidewater\TW Stockton(P2A)\Tables\QMR Tables\201 1\3Q1 1\20110916-Parcel2A(Tables 4,5,6,7)Historical GW Tables 3Q11-CL.xlsx Page 9 of 69