ARCHIVED REPORTS_FIRST QUARTER 2011 STATUS SUMMARY REPORT

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Attachment B Historical Groundwater Monitoring Results Former Tosco Bulk Terminal,3505 Navy Drive,Stockton,California 0 Date of I Mh I- total Depth to costo cw WFLL Sempfn9l TPH-D TPH-0 benEene toluene benzene xylenes MTBE WE ETBE TAME TBA melh.n.1 etpanol GW Elevation lal Elevation(b) ID Monlbnn (pWL) IV9IL) (.WL) (49/L) (µp11.) 149/1.) (V9/L) (49'L) 1µ91L) (pall-) (pall-) (Aall-) (V91L) (feetl ffeet msl lfeet) Comments MWd 11/1810610.80 -2.04 022810) 250 84 12 ]2 - - 10.64 -1.88 OS29107 10.92 -2.16 08/17107 100 82 0.98 11.58 -2.80 11130107 - - - _ _ _ _ _ _ _ _ - _ 1127 Z51 03119M 78 85 ND<0.50 ND<0.50 ND<0.50 NO-1.0 0.94 ND<D.50 ND<o,50 ND<0.50 41 ND<1D ND O 1D.06 -190 0521108 _ _ _ _ _ _ _ _ _ _ _ _ _ 1066 -1.90 0628106 98 Be _ _ _ _ 0.63 _ _ _ _ _ _ 11.oz d.2B 11/06108 n 69 - _ _ _ 1 ND<0.50 ND<0.50 NDeaso 19 10.93 -2.17 02109/09 ND<50 Npc0.50 - - _ _ NDmsll - _ _ _ _ _ 10.65 4.89 OSN7N9 NDeSD 69 - - _ _ ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<10 - _ 1027 -151 Oem1109 n ND<0.50 - - _ - 4Dc050 - - - ND<10 - _ 11.05 0.73 2.32 11102109 ND<50 ND<0.50 - - - _ ND<0.50 - _ - NDgO _ _ 10.90 2.17 02OW10 NDc50 Be ND<0.50 ND<10 - - 1021 AAB OS58/10 ND<50. ND<OSD - _ - - ND<O.So - - _ ND<10 - - 9.00 4.17 OBf3M10 NN50 120 - _ _ _ ND<0.50 - _ - ND<te - - 10.81 -2.08 12/03110 _ _ _ _ _ _ _ _ _ _ _ _ _ 10.67 -1.94 02/18/11 <50 <50 - _ _ _ <D,50 - _ _ <10 10.10 -1.37 MW4 0259 ND<50 - ND-0.50 ND<0.50 ND-0.50 ND<0.50 - - _ _ - _ _ - 4.51 - cmen 09/18/92 ND-5D NN50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 - _ _ _ - _ _ 13.40 4.89 interval 12tl Vet 67 14 <50 ND<0.50 ND<O.SO NDc0.50 ND<O.SO - - _ _ - _ _ 1130 4.79 74T 03/01193 140 ND<50 ND<0.50 ND<0.50 ND<D50 ND<0.50 - _ _ _ _ _ - 10.43 5.92 06g4193 NDk5O 17D ND<o.50 ND-0.50 ND<0.50 ND<0.50 - - _ _ _ _ _ 1121 470 WnW93 56 92 0.083 NNO.50 ND<0.50 ND<0.50 - - _ _ _ _ _ 12.81 4.30 12 93 77 58 22 14D<0.50 NDe0.50 ND<0.5D - _ _ _ _ _ _ 12.97 4.46 03/04/94 ND<50 NDe50 0.88 ND<0.5D ND<0.50 ND<0.50 - _ _ _ _ _ _ 11 g4 713 0610354 ND<50 130 ND-0.50 ND<0.50 ND<0.50 ND<0.W - - _ _ _ _ _ 1222 -771 092854 ND<50 340 0.67 ND<O.50 ND<0.50 ND<0.50 - - - _ _ _ _ 12.82 4.31 1210254 ND<50 370 ND<o.50 ND<0.50 ND<0.50 ND<0.50 - - - _ _ _ _ 12.37 q.86 03131/95 14 <50 420 0.59 ND-0.50 ND<o.50 ND<0.50 - - _ _ _ _ _ 964 513 0610 ND<50 380 0.57 ND<05o NDc0.50 ND<D.SD - - _ _ _ _ _ 1113 -862 1110155 63 270 0.92 ND<0.50 ND<0.% ND<1.0 1 D 5.0 - _ _ _ _ _ 13.00 4.49 OVI'V96 ND,250 810 1.9 NDat ND-1 ND<1 NDgO - _ _ _ _ - 10.19 5.68 05/1456 200 690 ND<2.5 ND<s ND<5 ND<5 ND<50 - - - - _ _ 10.84 4.33 09/10/96 ND250 280 ND2.5 ND<5.0 ND<5.0 ND<5.0 NN50 - - _ _ _ _ 11.36 4.85 DC-i(c) 09A0 ND<250 - NDk2.5 ND<5.0 ND<5.0 ND<5.0 ND<SU 1121198 ND<50 380 ND<0.50 ND<1.0 ND<1.0 ND<10 ND-10 - _ _ _ _ _ 1225 4.74 04116/97 320 5211 7.9 ND<i.0 ND<t.0 ND<1.0 ND-10 5.60 OBAW97 - _ _ _ _ _ _ _ _ _ _ _ _ 11.64 _7.13 085757 ND<5D 360 ND<2.5 ND<5.0 ND<5.0 ND<5.0 NDa50 012358 70 1000 3A ND<1.0 ND<1.0 1.0 ND<10 - _ _ _ _ _ 8.93 5.42 OC-t(c) 012358 ND<50 - 3.0 ND<1.o ND<1.0 ND<1.0 ND<10 07/1050 ND<5D 100 ND<0.50 ND<1.D 4De1.0 ND<1.0 NNlD - - _ _ _ _ 10.11 5.80 09[758 ND<50 HD 0.7 ND<1.0 ND<1.0 ND<1.0 ND<10 - - _ - - _ 11.50 4.99 1213058 12.17 -7.66 01.1659 ND<SO 210 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 - - _ _ _ _ 10.68 4.17 11.30 5.79 0827/99 _ _ _ _ _ _ _ _ _ _ _ _ _ 12.05 -7.54 11231% _ _ _ _ _ _ _ _ _ _ _ _ _ 1205 -7.84 02/18100 ND<50 900 NDa0.50 1413-0.50 ND<0.50 ND<0.50 1.1 - - - - _ - 1090 5.79 0428/00 _ _ _ _ _ _ _ _ _ _ _ _ _ 10.49 5.98 082550 ND<s0 ND<O ND<0.50 ND<0.50 ND<0.50 ND<0.50 13 - _ _ - _ _ 12.08 -7.55 11/1550 _ _ _ _ _ _ _ _ _ _ _ _ _ 10.95 4.M 01/17101 ND-50 280 ND<0.50 ND<0.50 ND<0.50 ND<9.50 ND<0.50 - _ _ _ - _ 11.91 -7.40 OM51D1 _ _ _ _ _ _ _ _ _ _ _ _ _ it." -7.13 0875101 _ _ _ _ _ _ _ _ _ _ _ 11.73 -722 0954101 ND-50 no ND-0.50 35 ND<0.50 NDkO.50 - _ - _ _ _ _ 12.30 -0]9 10.72 4.21 1 11 I monocoPeke,enmasa,a Bulk PkuoeV0013 SWWMT0p4ok@0l11Twrs t to 5070022 BC totl.az Page 5 of 18