ARCHIVED REPORTS_FIRST QUARTER 2011 STATUS SUMMARY REPORT

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Attachment Historical Groundwater Monitoring Results Former Tosco Bulk Terminal,3505 Navy Drive,Stockton,California o Data of ethyl. total I De thin Casin GW WELLrSamplingfng/ TEM. TPH-0 benzene t.Imm. benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol GW Elevation la) Elevetlon(b) 10 n W91L) (V91L) (4gIL) (µ9/L) (µ91l) WNL) (pOL) (P91L) (V9IL) (491L) W91L) (V91L) (4gIL) (feet feet mslVeep commenm MW-02 W NO<50 ND<0.50 ND<0.50 i6 2.1 - - - - - _ _ 1211 3q2 3 260 83 ND<050 ND<O.W 2) 32 - - - - - - _ y33 140 300 ND<0.50 ND<0.50 ND<0.50 1.] - - - - - _ - 10.30 -].01 3 140 280 ND<0.50 ND<0.50 0.51 2.3 - - - - - _ - 11.B6 H5] 3 170 320 ND<0.50 1.0 12 6.5 - - - _ _ - - 1189 480 4 140 120 ND<0.50 ND<0.50 0.91 0.71 - - - _ - - - 10.68 -].39 94 200 140 ND<0.50 NDc0.50 1.9 3.0 11.22 -0.83 94 130 ISO ND<0.50 NO<0.50 12 22 - - _ - - _ - 11.83 -0.54 94 190 260 ND<0.50 ND<050 SIN0.50 14 <0.50 - _ - - _ _ _ 1121 4.02 Wp155 140 260 61 <0.50 N0<0.50 0.79 0.67 - - _ - _ _ - 8.67 -5.38 C&OV95 220 250 SINO.50 N)<O,50 ND<0.50 ND<0.50 - _ - - _ _ _ 1025 -696 1110155 2200 350 250 1,1Dg3 ND03 18 5300 - - - - - _ 11.43 4.14 02/14/96 ND<50 180 1,10<0.50 ND<1 ND<1 1.5 ND<IO - - _ - _ 9.95 686 OC4(c) OV14M ND<50 - N)<0.50 ND<1 ll <l ND<1 ND<10 - - _ - _ _ _ 05/1450 110 160 N0<O.50 ND<1 NO OC-1(q 05/14/96 190 - ND<0.50 NO<1 ND<1 ND<1 ND<10 - _ - _ _ _ _ _ 09/10/90 1,10<50 50 ND<0.50 ND<1.0 ND<1.0 NDc1.0 11 <10 - - - - _ - 10.40 -7.19 1121/96 ND<50 180 1,1D<0.50 ND<1.0 ND<1.0 ND<1.0 1`1O<10 - - - _ _ _ 11.24 g95 OC/16/97 00 ND<100 ND<0.50 1,1D<1.0 ND<1.0 NO<1.0 ND<10 - - - _ _ - 9.38 6.09 08/06/97 10.35 -7.00 080]/9] ND-50 ND<IW N)<0.50 NDq.O ND-1.0 No<1.0 ND<10 - - - _ - - _ OC-1 It) 080]/9] ND<50 - SINO.50 NOLO SINIO NDO.D ND<10 - - _ - - _ _ 012350 14 <50 210 ND-0.50 NO<1.0 ND-1.0 N130.0 ND<10 - - _ - - - 8.98 5.69 0711018. NN50 ND<100 ND<0.50 ND<1.0 ND<1.0 ND<1.0 ND<10 - - - _ - _ 9.37 6.08 09/1750 390 1,1D<100 NNI3.50 ND<1.O 140<1.0 N 1.0 420 - - - _ - - 10.57 -728 12/30/98 _ _ _ _ _ _ _ _ _ _ _ _ _ 1053 324 W116199 130 70 SIN1.0 ND<I8 ND-1.0 ND<1.0 e7 - - - _ _ - 10.04 6.75 05,30/99 10.40 -7.11 0027/99 1121 -0.92 fl23/99 11.24 -7.95 W18/00 83(k) ND<390 ND<0.W ND<0.50 ND<0.50 1.7 230 - - - _ - _ 10.16 4.87 0426/00 9.55 -028 082500 120 0047 N)<0.50 ND<0.50 N0<D.50 5.0 120 - - _ _ _ _ 11.10 -7.01 1IMSIOD 11.15 g.86 01/17mi 100 82 N)<0,50 NDA.50 ND<0.50 N(><0.50 97.0 - _ _ _ _ - 10.6] A20 065501 10.63 -7.34 06/1501 - - _ - _ _ _ _ _ _ _ - - 10.74 -7.45 11x1 samNetl 09/04/01 82 180 - - - - 12. ND<2.0 bl 2.0 ND-2.D ND<00 - 000000 11.26 -].8] nosheeNno near IVII101 - _ _ _ _ _ _ _ _ _ _ NO<SW - 10.85 -7.56 ..ah-Wo.ono, 0221/02 ae 140 - - - _ 170 ND<O.5D ND-0.50 0.59 11.0 1,1D<50 ND<5.0 9.73 4.44 no shanomm War 0522/O2 _ _ _ _ _ _ _ _ _ _ _ _ _ 10.43 0.76 -1.67 0021/02 ND<250 SO 89 NO2.5 1102.9 ND<.5 ND2.5 140 NO<10 ND<10 ND<10 ND<500 IN Op) ND2500 11.2D 3,44 II/1402 - - - _ - - _ _ _ _ _ _ _ 11.05 -2.29 0280/03 130 0) 130(2 - - - - 160 ND<0.50 ND<0.50 N)<0.50 23 NN1000 ND-100 9.95 -1.19 OSnW03 _ _ _ _ _ _ _ _ _ _ _ _ _ to." -1.66 08/13/03 1)0(o 190(2 - _ _ _ 09 ND<0.50 N)<D.50 ND<O5D NN10 NNIODO ND-1000 11.13 -2.37 1222/05 _ _ _ _ _ _ _ _ _ _ _ _ _ 1I.D4 -226 02/10104 170(2 1102) - - _ _ 62 ND<1.0 ND<0.50 0.35(0) 9.3 ND<5O ND<5.0 10.52 .1.76 0520/04 _ _ _ _ _ _ _ _ _ _ _ _ _ ID-59 .1.83 00116100 x01 sio - _ _ _ 12 _ _ _ _ _ _ 11.45 -2.e9 112904 - - - _ _ _ _ _ _ _ _ _ _ 11.08 2.32 02/17/05 150 140(1) - - _ _ 86 _ _ _ 37 _ _ 932 05/12/05 _ _ _ _ _ _ _ _ - _ _ _ _ 9.60 -0.84 DWO/O5 160 110 - _ _ _ 3.6 - - _ _ _ _ 11.01 -225 11(30/05 _ _ _ _ _ _ _ _ _ _ _ _ _ 11.63 8.87 OWOWW 350 130 - - _ _ 25 _ _ - 26 _ _ 10.56 -1.80 OSbOIW _ 9.16 4 0851IW 320 110 - - 2.4 10.76 -2AS .00 llcorw[uPnaysrtemmae a,e.un wmm�.ou sex pomimkslz.nrtmks t io s.,e APGO c 1m1.ac Page 4 of 18