ARCHIVED REPORTS_3RD QUARTER 2010 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 bgs) 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.) 2AMW-12(cont.) --- 8/16/06 0.42 5.6 --- 0.15 21 <0.0005 <0.0005 <0.0005 <0.0015 --- 11/16/200620 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 --- 0.14 26 <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 0.00072' --- 10/9/07 0.34 4.7 --- <0.05 <0.0005 <0.0005 <0.0005 0.00076' --- 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 ' --- 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 26 <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 --- 0.09237 <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 --- 0.08137 <0.0005 <0.0005 <0.0005 <0.0005 7/20/10 0.22 6.1 --- 0.07137 <0.0005 <0.0005 <0.0005 0.00062 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 --- 0.15° 19 29 3.5 16.7 --- 5/8/03 170 15.00 --- 0.69° 19 31 3.5 12.47 --- 8/21/03 190 12.00 --- 0.21" 20 28 3.7 19.3 --- 11/14/03 170 26.00 --- 0.91" 18 31 3.6 16.8 --- 2/20/04 130 28.00 1.216 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' 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 0.30024 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 0.07616 13 22 3.0 14.1 --- 5/15/06 Not sampled due to Sheen --- 8/16/06 160 <12' 0.26 26 16 20 3.3 14.3 Stantec I:\Tidewater\TW Stockton(Parcel 2A-0415)\Tables\QMR Tables\2010\3Q10\Parcel2A(Tables 4,5,6,7)Historical GW Tables 3Q10.xls Page 10 of 66