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 O Date of i m 1- b,.I I Depth to Co..., GW WELL Sampling/ TPHG TPH-0 benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol GW Elevation(a) Ele-lion On) ID Mennen (V91L) 1491L) (As&) (491L) (491.) (yglL) (,91L) ly9/L) (µ9/L) (V91L) I"11-) (µ91L) (yglLl /he) tf..t msit (feet) Comments MW-12 1121/94 ND<5D ND<50 NO<050 ND<0.50 ND<050 ND<050 - - _ - _ _ _ - 7,50 - creen 1PM2940) 11.17 -3.67 inzereal 08148/97 ND<5D 150 Nbca.SO ND<1.0 ND<1.0 ND00 ND<10 - - _ - - - 10.43 -2.93 1024' Want NDz250 390 1402.5 NNSO NDc5A ND-SO N040 - - - - - - B.B] -1.13 07/10198 2600 100 ND2.5 ND<5.0 NDc5.O NNSO 23p0 - _ - - _ - 0.92 _1,q3 09/17198 ND<50 150 ND<0.50 NDc1.0 tU<1.0 NDcl.0 ND<10 - - - _ _ _ 10,41 -2.91 IMOBI8 10.31 -2.81 02/16/99 NDc50 130 NOct.O NDc1.0 ND<1.0 NOat 0 ND-1.0 - - _ _ - - 9.80 -2J0 099099 10,05 .2,55 0827/99 - - _ _ _ _ _ _ _ _ 10.31 -2.81 1123/98 11.07 -3.57 02/18,00 NDc50 NOa390 NNO.50 NDc0.50 NDcOOO ND<D.5O NOc0.50 - - - _ _ _ g8q 234 0426100 9.97 -2A7 082540 NDc50 ND<47 ND<0.50 No<0.50 NDcO.50 NOc0.50 NOa0.50 - _ _ _ _ _ 10.70 120 11/15100 - - - _ _ _ _ _ _ - - - - 10.55 4,05 01117101 NO<50 NDc50 ND-U.50 ND<0.50 ND<0.50 NDcO.5O NOcO 50 .70 420 Want _ _ _ _ _ _ _ _ _ _ _ _ _ 10ma3 2.83 O6n5,01 _ _ _ _ _ _ _ _ _ _ _ 10.g3 -z.9] net samples! - - - _ _ _ _ _ _ _ _ 11.02 4.52 not sampled 1v1 v0t _ _ _ _ _ _ _ _ _ _ _ 1o.fi1 -3.31 not aemged 0121102 NDc50 NDc50 NDcO.5O NO<0.50 NDc0.50 NNO.50 ND<0.50 ND<0.50 ND<0.50 NNO.SD NDcSD ND<SO NDc5.0 9.69 2.19 no sheeNno odor 052 10.09 8.06 -1.05 OMIM2 _ _ _ _ _ _ _ _ _ _ _ _ _ 10.85 -1.01 11/1b - - - _ _ _ _ _ _ - - 10.97 -1.83 0120/03 ND<SO 1500) NDcO.50 NDcO.50 NDa0.50 NOc0.50 ND<0.50 140<0.50 ND<0.50 NDcO.SO NNSO NO<1000 NDc1OO 9.75 4.71 05110103 10.18 -1.14 08/13/03 10.14 -1.00 1122/03 OPH0,04 ND<50 W(e) ND<O.SO D25 In) N9c0.50 0.5214) NDcO.50 NDctO NDcO.50 ND<0.50 NNS.0 NDc5D ND<5.0 10.12 AAB 0520144 - _ _ _ _ _ _ _ _ _ 1021 -1.17 Of 08/1&M - - _ _ _ _ _ _ _ _ _ 11.03 -1.00 aconfined M runtroarrat raft Stamina:as donM M 08 20 MW3 1121/Bq 140c50 NDc50 14 <0.50 ND-0.50 ND<OM 14O<0.50 - - _ _ _ _ - _ ipgl - im9 (9) - _ _ _ _ - _ _ _ 7.97 2.94 QC-2(h) 11141185 ND<50 - NNO050 ND<0.50 ND-0.50 NN1.0 NOc5.0 - _ - OC-Z(b) 02z`W96 ND-50 - ND<O.SO N0<t ND<1 ND<1 NN10 - _ _ OC-3(F) 05/14116 NDc50 - NO-0.54) NO<1 NDct ND<1 NN10 - - _ - 009697 7.41 3.50 OB9797 ND<50 NDzIOO ND<0.W ND<L0 NDc1.0 NDs1.0 NDc10 - - _ _ imerwl 012390 14 <50 ND200 ND-0.50 NNI.O 1,100.0 NDc1.0 ND<10 - - - _ 11.49 4,58 10-24' 07/1098 ND60 ND<100 ND<0.50 NNIO NDciO ND<1.0 1,1300 _ - _ _ _ - 11A8 457 09/1798 ND<50 ND<100 1113s).50 NNIO NDc1.0 FID-1.0 13 - - _ _ _ _ 1p02 211 42090 12.2 -1.51 01/16/99 NDc50 NDc50 NDc1.0 NOa1.0 NDq.O NNIO ND.IO - - - _ _ _ 1225 -134 0690`99 _ _ _ _ _ _ _ _ _ _ - _ _ 12A1 -1.43 0927/98 _ _ - _ _ _ _ _ _ _ _ 12.72 -1.61 IlAsmr9 _ _ _ _ _ _ _ _ _ _ _ 13.70 2.79 01/1500 NDc50 NDc390 ND<O.50 NNOOO NDcO.50 ND<0.50 ND<0.50 - - - _ _ _ 1223 A.32 12.31 -1.40 0025140 ND<50 ND47 N0<0.50 ND<0.50 NDc0.50 ND<0.50 NO<0.50 - - _ _ - - 13.61 2.70 11/1590 11.83 -1.02 01/17/01 NDc50 14 <50 ND-0.50 NDc0.50 ND<0.50 NOc0.50 NDcO.50 - - _ - - - 13.37 -1.02 069591 _ _ _ _ _ _ _ _ _ _ _ 13.36 -2A5 06115,01 - - - _ _ _ _ _ _ _ _ _ - 13.45 .2,55 not samgetl 09`91,01 - - - - - - - - - - - - - 14.01 4.10 not samMe, imimi - - - _ _ _ _ _ - - _ - - 13.80 -2,89 nal sampled 012192 ND<50 NN50 NDcUO ND<050 NDc0.50 ND<0.50 ND<0.50 ND<O.5D NND.50 ND<0.50 NDcS.O NN50 NOc5.0 12.16 A.55 no ahaanant odor 13.40 12.48 -0.91 0021142 _ - - - 13.87 -138 11C1nw chl,,sTem mas aid Buh 11scanIO013 SMMon1TY4S3o111Tebks 1 te 5 sort bP e C 1011.ab Page 14 of 18