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TABLE 2 Historical Groundwater Monitoring & Analytical Data Former Chevron Service Station No. 94054 2103 Country Club Boulevard, Stockton, California Well No. Date Notes TOC (ft-MSL) Depth to Water SPH (ft) GWE (ft-MSL) TPH- DRO TPH- GRO B (pg/L) T (pg/L) E (p g1L) X (pg/L) MTBE (pg/L) T BA (pg/L) TAME (pg/L) 12- , DCA (pg/L) EDB (pg/L) D.O. (mg/L) Comments - MW-113 11/23/09 374 11 65 000 -791 1.900 370 4 06 3 0.8 <05 <05 08 MW-113 05/17/10 3.74 7.99 0.00 -4.25 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <05 <05 1.1 MW-1B 11/03/10 174 11.18 0.00 -7.44 - 5,300 2.100 18 <3 14 3 1.2 MW-1B 01/05/11 3.74 7.98 0.00 -4.24 4,600 1,500 19 3 16 <1 - 1.5 MW-1B 08/02/11 174 9.40 0.00 -5.66 5,800 1,800 21 <3 18 <3 1.4 MW-1B 02/03/12 174 9,65 0.00 -5.91 - 2,200 360 4 0.6 6 2 - 1.5 MW-1B 08/09/12 3.74 10.94 0.00 -7.20 - 5,700 1,300 16 2 14 3 1.4 MW-1B 03/14/13 3.74 8.40 0.00 -4.66 - 5,500 1,400 13 <5 10 <5 2.0 MW-1B 09/25/13 3.74 11.38 0.00 -7.64 - 3,800 1,100 11 2 14 2 - 1.2 MW-1B 03/18/14 174 924 0.00 -5.50 3,100 1,100 4 2 11 2 - 1.3 MW-1B 09/29/14 3.74 12.70 0.00 -8.96 - 2,400 710 3 1 8 1 - 1.5 MW-1B 03/25/15 3_74 9_52 0.00 -5.78 1,600 380 2 2 10 0.7 - -- -- - 1.0 MW-1B 09/27/15 3.74 13.34 0.00 -9.60 1,300 180 2 0,7 5 <2 <2 <2 1.2 MW-1B 03/28/16 3.74 8.71 0.00 -4.97 1,400 73 1 0.5 5 <2 <2 <2 - 1.1 MW-1B 09/26/16 3.74 12.78 0.00 -9.04 1,400 180 <3 <3 <3 <3 - <2 <2 -- 1.1 MW-1B 03/27/17 3.74 5.66 0.00 -1.92 990 81 2 <0.5 3 <2 - <2 <2 - 1.0 MW-1B 09/26/17 3.74 10.81 0.00 -7.07 - - - - - - - -- - - -- 1.1 MW-1B 09/26/17 3.74 - -- - 1,100 130 1 <0.6 4 2 - <2 <2 - Resa mp led due to broken samples MW-1C 11/10/06 3.64 12.03 0.00 -8.39 _ -- -- - -- -- - - - -- Well development attempted MW-1C 11/13/06 3.64 1208. 0.00 -8.44 - 2,600 410 15 25 170 <2 1.2 MW-1C 02/12/07 3.64 10.74 • 0.00 -7.10 - 2.600 390 12 16 110 2 - 1.4 MW-1C 05/14/07 3.64 11.18 0.00 -7.54 2,000 530 16 16 110 <2 1.2 MW-1C 08/13/07 3.64 13.02 0.00 -9.38 2,000 310 8 8 66 <0.5 1.5 MW-1C 11/12/07 3.64 12.55 0.00 -8.91 1,000 160 3 2 36 <0.5 -- 1.3 MW-1C 02/11/08 3.64 10.00 0.00 -6.36 710 96 5 6 21 <2 - - 1.4 MW-1C 05/12/08 3.64 11.15 0.00 -7.51 - 170 2 <0.5 <0.5 <0.5 <0.5 - - 2.2 MW-1C 08/11/08 3.64 12.97 0.00 -9.33 890 200 4 4 22 <2 -- -- 2.2 MW-1C 11/10/08 3.64 12.64 0.00 -9.00 - 510 100 1 0.7 6 <0.5 <0.5 <0.5 1.2 MW-1C 02/09/09 164 11.75 0.00 -8.11 610 160 2 <0.5 9 <0.5 <0.5 <0.5 0.9 MW-1C 05/11/09 3.64 11.53 0.00 -7.89 82 0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 1.1 MW-1C 11/23/09 3.64 12.76 0.00 -9.12 100 13 <0.5 0.8 4 <0.5 <0.5 <0.5 0.8 MW-1C 05/17/10 3.64 10.42 0.00 -6.78 <50 <0.5 <0.5 0.6 3 <0.5 - <0.5 <0.5 1.0 MW-1C 11/03/10 167 12.23 0.00 -8.56 - 120 15 <0.5 2 6 <0.5 - - 1.4 MW-1C 01/05/11 3.67 10.99 0.00 -7.32 <50 <0.5 <0.5 <0.5 <0.5 <0.5 - - 1.6 MW-1C 08/02/11 3.67 10.80 0.00 -713 1,100 400 4 1 4 <0.5 - 1.5 MW-1C 02/03/12 3.67 10.41 0.00 -6.74 200 11 <0.5 <0.5 2 <0.5 - 1.4 MW-1C 08/09/12 3.67 11.76 0.00 -8.09 <50 <0.5 <0.5 <0.5 <0.5 <0.5 • - 1.2 MW-1C 03/14/13 3.67 9.85 0.00 -6.18 - <50 <0.5 <0.5 <0.5 <0.5 <0.5 - 1.4 MW-1C 09/25/13 3.67 11.68 0.00 -8.01 290 54 0.8 2 10 <0.5 - 2.4 MW-1C 03/18/14 3.67 10.60 0.00 -6.93 - 230 60 <0.5 <0.5 1 <0,5 - 0.8 MW-1C 09/29/14 3.67 13.03 0.00 -9.36 - 63 12 <0.5 <0.5 <0.5 <0.5 - - 1.7 MW-1C 03/25/15 3.67 11.71 0.00 -8,04 <50 <0.5 <0.5 <0.5 <0,5 <0.5 - - 1.3 MW-1C 09/27/15 3.67 13.76 0.00 -10.09 <50 <0.5 <0.5 <0.5 <0.5 <2 <2 <2 1.5 MW-1C 03/28/16 3.67 10.45 0.00 -6.78 <50 <0.5 <0.5 <0.5 <0.5 <2 <2 <2 0.8 MW-1C 09/26/16 3.67 12.62 0.00 -8.95 460 160 1 <0.5 <0.5 <2 <2 <2 1.2 MW-1C 03/27/17 3.67 7.62 0.00 -3.95 <50 <2 <0.5 <0.5 <0.5 <2 <2 <2 1.1 MW-1C 09/25/17 3.67 10,69 0.00 -7.02 -- -- -- -- -- - - -- - - 2.1 MW-1C 09/26/17 3.67 - -- - <60 <0.5 <0.5 <0.6 <0.5 <2 - <2 <2 Resampled due to broken samples MW-2 11/05/86 - 11.41 0.00 - - - - MW-2 11/13/86 - 11.44 0.00 - -- -- - - MW-2 09/09/87 - - -- 6,500 13,000 14.000 1,700 8,100 94054 GW Tables.xls Page 3 of 29 Stantec