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 OI Det,of I el mtzl Depth in C.S,n GW WELL SamPGngl TPH-0 TPH-0 benzene toluene benzene xylenes MTBE RIPE ETBE TAME TBA methanol ethanol GW Elevation la) Eleven..lbl 10 Monitoring (V91L1 14gn-) (V9)L) (ygIL) (V9R) IV91L) (491L) (4911) (..IL1 Wfl-) (A91L) I491LI (4911) (feet) (feet mall (feet) comments MWAIC OS/W/10 NNW NNW NNW NN50 ND,50 ND-16 SA 98 - - 52 NN100 - 4B7 -2 71 0wO/10 NNW 1,900 NNO.50 NNO.W ND-0.50 ND-16 ]2 10 - - 62 ND-100 N0250 5.06 -3.90 1;9110 _ _ _ _ _ 5.72 -356 011111 a50 74 -050 -0.50 a0.50 '1.0 8.9 11 53 -10 250 4.62 -246 MW-090 Dw"a 69 440(r) NNUD ND-0,50 NNO.50 NDA50 35 NNO50 N00.50 NDa0.50 49 - 4M100 13.64 11.2 -244 06/13103 NNW 380(0 ND-D.W NO-0.50 NNO.50 NNO.50 29 NNO.50 NNO.50 NNO.W 11 - NNION 14.90 -331) mlervel 122;03 NO-50 200(0 NNO.50 ND-OsO ND 0.50 NO-0.50 29 ND 0.50 ND&W NDa0.50 ND-10 - NN100 14.40 4.20 60-70OVIOI04 NNW 140(0 0.SSOO 0.43(u) 0.19(.) 0.66(14) 26 NNI.0 ND-0.50 NND.50 15 NNW NNS.O 13.92 -272 0520/04 _ _ _ _ _ _ _ _ _ _ _ _ _ 14.34 4l.14 08/1604 N020 430 ND-0.50 NO-0.50 NNO50 NO-0.50 NNO.N - - - ND-S.0 NNW NDa5.0 15.05 4.85 1129/01 _ _ _ _ _ _ - _ _ _ _ _ _ 44.61 3.41 02/17/05 NNW 86(0 ND-0.50 NNO.50 ND-0.50 ND-1.0 0.07 - - - 5.1 NNVO NNSO 12.75 -1.55. 05/17105 _ _ _ _ _ 13.43 3.23 00130105 NNW 29 11D<O50 NNO.50 NNO.50 ND-1.0 NNW - - - NDa5.0 NNW NNW 14.67 4.0 willOv 614, NNW - - - - - - - - - - - limms _ _ _ _ _ _ _ _ _ _ _ _ _ 15.07 467 02102/06 NN60 NNW ND-0.50 NNO.50 NNOsO NNI.O 32 - - - NNSO NNIO,OW NO-IN 12.71 -1.51 06.4(W8 _ _ _ _ _ 12,93 4.73 0851/06 NNW NNW NNO.50 NNO.W NNO.50 ND-16 13 - - - 38 ND-10.0N ND250 14.31 3.14 11/16/06 _ _ _ _ 14,48 3.28 726D7 NNW NNW ND-O50 NND.50 ND-0.50 NDa19 0.66 - - - 12 120 N0250 1364 3.84 0529/= _ _ _ _ _ _ _ _ _ _ _ _ _ 14.27 4.07 0627107 NNSO SO NDA50 NNO50 NNO.50 NNI.O NNO.SD - - - NO6.0 ND 10.000 ND250 14]0 4.58 1120107 _ _ _ _ 14.70 4.50 03119:8 NNW e7 NNO.50 NNO.50 NO-0.50 NDa1.0 088 NN50 NDa50 NNSD NO-10 NNIO NNQ O 13.68 41.46 0521108 _ _ _ _ 14.03 -2.83 082a109 NN50 56 NO-0,50 NDa0.50 ND-0.50 NNIA NNO.50 - - - NDa10 NNIO NNNO 14.49 429 11:8:0 - - - - - - - - - - - - - 14.59 41.39 0 "AN, NNW 65 ND-D.50 ND-0.50 NNO.N ND-1.0 ND-0.50 - - - ND-IO NN100 NM250 13.N -2AD 05:7/09 _ _ _ 13.75 3.55 0821109 NNW NNW NNO.50 NNO.50 NNO.50 NNIO 0J1 - - - NO-10 - ND25D 14.45 10.6 4.85 11/11:9 _ _ _ _ _ _ _ _ _ _ _ _ _ 14.32 4.72 O;O1W NNW NNW NNO.50 NNO.50 NNO.50 ND-16 1A - - - NN10 1200 ND250 13.30 -270 05106/10 _ _ _ _ _ _ _ _ _ _ _ _ _ 1220 4.60 0630/10 NNW ISO ND-0.50 NDa0.50 ND-0.50 NNI.O NNO.N - - - ND-1D NDQW NO-250 14.44 4.84 12:1/10 _ _ _ _ _ _ _ _ _ _ _ _ _ 1307 -2.47 02/18111 65 1 -50 X0.50 -0.50 4.N -1.0 54 1 -10 QOO 250 13.14 3.54 M" 12 03 NNW ISO(r) NNO.W NDaOsO NOON NNO.W 0.6 DO ND-0.50 NNO.50 17 - NNION 626 2.50 4,68 02/10104 ND-50 940) 0.34(ta) SOW) 0.350) IAM 2.2(0 OA2(au) NNO.50(i) NDa0.500) 3.70.e) NNW ND-5.0 5.05 -2.47 Interval OwOm 20 - 280 NNO.50 NDA,50 NNO.50 NND,50 1.0 - - - 5.0 - - 6.15 3.57 9.849' 08;16104 ND-20 1,tN ND-0.50 NNO.50 NNO.W ND-0.50 06 0.6 NNO.W ND 0.10 NOA.O NNW NNSO 0.07 429 1129/04 NO2D 2DD NNO.50 NNO.W NND.50 NNO.50 2.0(14) OS(.) NNO.W NNO.W NN5.0 - - 624 4.88 0;17105 NNSD NNW NNO.SO NDA.: NNO.50 ND-I6 52 1.2 NNDsO NNO.50 17 NNSN NNW 5.70 4.12 05/17/05 20h 100 NNO.50 NDA.: NDA.50 NNI.O 4A 0.86 NNO.50 NND.50 10 - - 4.% -2.38 0020/05 ND60 38 NDA.W NNO.50 NNO.50 ND-1.0 2.5 D.60 NDA50 NNO.50 0.0 NN50 NNW 6.47 4.89 11130105 N040 NN50 ND-0.W NO-0.50 NNO.50 NO-1.0 11 16 NO-050 NNO.50 2.4 - - 6.07 4.29 O2:ADB NNW ND-SO NNO.50 NO-0.50 NNOsO NDa1.D 5.5 ND-1.0 NDA.: NO-0.W ND-5.0 NNIO,ODO NNIN 4.30 4n 052696 NNSO NNW NNO.50 NO10.50 NNO.50 NN1.0 8.1 1.2 NNO.50 NNO.50 15 - NNIN 4.70 3.12 08:1106 NN50 110 NND.50 NNO.50 NDA.: ND-1.0 4.6 0.61 ND-0.50 NOa0.5O 9.3 NO-10.000 ND250 6.25 41.87 11116106 NM50 110 NNO.50 NNO.50 ND Oso NNIA 5.7 0.87 NDA.SO NNO.50 9.6 - - 6.20 4.62 0226107 NNW NNW NNO.50 NNO.W NDA.: NDa1.0 IS 0.97 NDA.: ND-0.50 11 120 ND-250 5.43 3.85 0529:7 NNW NN50 ND-OO 50 NINON NDA.: NNIO 13 1A NDA.= NNO.50 23 - - 6.10 4.52 0827:7 NNSD 03 NDA.N ND-0.50 NNO.50 NNIO 15 1.1 NNO50 NNO.W 20 11 x10.000 NDa2% 6.61 4.03 11/3=7 N060 110 NNO.50 NNO.5D NNO.50 ND-10 9 0.76 NNO.W NDA.= 20 - NO2511 6.55 4.97 0119/% NN50 NNW NDA.= NNUO NNO.50 NNI.O 12 0.94 ND-0.50 NDaD.50 ND-ID ND-10 ND250 5.11 3.53 0521:8 ND-50 52 14 a03D ND-0.50 NNO.50 ND-1.0 13 1.1 ND-0.50 NNO.60 NDQD - - 5.98 41AD 0828108 NN50 NNSO NNO.50 ND-0.50 NNOsO NDa1.0 12 1.3 ND-0.50 ND-0.50 W NN10 N0250 6.60 4.02 11:8:8 NNW 57 NNO050 ND-0.50 NNOsO NDa19 11 1.1 NNO.50 ND-0.50 12 - - 6.12 -354 02)NM9 55.0 NO-50 ND-9.50 NNO.50 NNO.W NDa1.0 6.6 1.3 NDa050 ND-0.50 12 NDa100 NO-250 5.52 -294 05:7109 NNW 7 1 NDa050 ND-050 NNOsO NDa1.0 10 1.9 NNO.50 NNO.50 64 5.38 4WO MW-20 08/31109 NNSO W NNO.50 NNO.50 NDA50 NDa16 s 1.6 NOa050 NNO.50 17 NEON NO250 622 2.32 4.90 11112/09 NNW 52 NNO.50 NNO.50 NNOsIl NNIO 2.6 067 NNO.50 NNO.W NO-10 - - 5.96 4.64 02/03/10 NNW NNW NNO.50 NNO.50 NDa10 NDa10 2.4 05 NNO.W NNO.50 NN10 NN100 N0250 473 -241 05/06/10 ND-50 NDa10 NNIO -T- 0.86 100.450 NON50 NNt0�- - 4.80 - -5,48- 0"0110 NNW 71,D NDa0.50 NNO.50 NND.50 NDg6 NND.50 0.63 NNUO NOA.N NOa10 NNION) NOa250 6.22 4.90 I2:VI0 NNW tN.D ND-0.50 NNO.W ND-D,50 NNIO 1.7 0.71 NN1541 NNO.50 35 - - 5.74 4A2 0;1611 1 -50 1 160 -0.50 x0.50 -0.50 A.0 1 22 1 0.85 x0.50 a0.5(1 28 -10 QW 4.7 -235 1M 1amvvnBp,lTem robaid BUM Pbd6n0013 slacMom7adm1A 119rO1n 1105 and APy e c 1011 its P6Be 18 of 18