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TWO <br /> Summary of Ground Water Monitoring and Analyses <br /> Former Mobil Oil Bulk Plant 04-343 <br /> 500 East Gtantline Road <br /> Tracy, California <br /> Well Data of Casing Depth to Ground TPH-Q TPH-D I Benzene Toluene Ethyl- Total Fecal Lead Phond Diethyl 2-HEX Lab <br /> 10 Sampling Elevation Water Water (ppb) (ppb) (PPb) (ppb) benzene xylenes coiatarm (ppb) (ppb) Phthalate <br /> (feet) (feet) Elevation (ppb) (ppb) (ppb) (Ppb) <br /> (ppb) <br /> AW-4 02121/92 10.69 22.07 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> (cont) 04/07/92 33.28 11.01 22.25 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 _ SEQ <br /> - --- -- <br /> 04/24/92 11.01 22.25 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 _ - - - - SEQ <br /> 07f�W92 11.14 22.12 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - - - SEQ <br /> 10111/92 11.22 2204 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - SEQ <br /> 01/22/93 10.17 23.09 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - SEQ <br /> �2M 10.61 2285 ND<50 ND<60 ND<0.5 NDc0.6 ND<0.5 ND<0.5 _ 3.8 NDQO ND- SEQ <br /> 05127/93 10.74 2252 ND<50 ND<50 ND<o.5 ND<0.5 ND<0.5 ND<0.5 - - - SEQ <br /> 10/28/93 11.13 22.13 ND<50 ND<60 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - SEQ <br /> i �. _ SEQ q <br /> 01/21/94 11.09 22.17 ND-c50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - <br /> -� - SEQ i <br /> AW-5 x"7/91 30.61 10.21 20.40 ND<50 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 NDQ <br /> oBJ21/91 10.07 20.64 ND40 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 - - - - SAL11/26/91 10.89 19.92 ND<30 370 NDc0.30 ND<0.30 ND<0.30 ND<0.30 _ - - SEQ <br /> 02/21/92 10.43 20.18 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 4 - SEQ <br /> 04/07/92 31.11 10.72 20.39 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 - - - SEQ <br /> 04124/92 10.71 20.40 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 - - SEQ <br /> 07/20/92 10.79 20.32 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 NDc0.5 - - - SEQ <br /> 10/21/92 10.78 20.33 ND<50 96 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - - - SEQ <br /> 01/22/93 10.09 21.02 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<o5 - - - SEQ <br /> 04/02M 10.48 20.63 NDc50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 "` NDQ 0 NDQ 0 NDc5.0 SEQ <br /> - <br /> 05127/93 10.62 20.59 ND<60 ND<50 ND<0.5 ND<0.6 ND<0.5 ND<0.5 - _- SEQ <br /> 10/28/9310.80 20.31 ND<60 ND<60 ND<0.5 ND<0.5 ND<0.5 ND<o.6 - - SEQ <br /> 01/21/94 10.81 20.30 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 _` _ _ - -- - - SEQ <br /> SED <br /> AW-6 OW7/91 29.59 10.37 19.22 ND<50 ND<50 ND<0.3 ND<0.3 NDc0.3 ND<0.3 NDQ _ <br /> SJAL <br /> 08/21/91 1025 19.34 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 _ - _ <br /> NOTES: ppb = parts per billion( <br /> TPH-0 w total petroleum hydrocarbons as gasoline Tap of casing elevations were surveyed In reference to a railroad spike set In an <br /> Wand on the <br /> TPH-D - total paboleumhydrocarbons asdew, aWOXI�te��IneofEast GrandineRowl19.6 ealwesttromtha <br /> ND = not detected at detection limps stated in oftl W tabora� r centerline of the railroad spur tracks. <br /> ry reports All web <br /> resu edonA <br /> not rveY 171 <br /> measurecYrrot analyzsd�n0t applicable 1992 data re � �'�Lend ImproverrlentServloes.Apn17 arrd24, <br /> 2-HEX reflect resurveyed= 2-He7oen-1-0t(q � eyed elevations i <br /> sample reported as not matching M*W pas UM pattem <br /> samptad reporlad as not appearing to cont*Qasoaine <br /> AEL • American Environmental Laboratories,Inc. <br /> rAL • Superior Analytical Laboratories,Inc. <br /> SEQ = Sequoia AnaN*W <br /> I <br /> Page 3 of 6 30-13e/M TABLE OZWM <br /> I <br />