ARCHIVED REPORTS_GROUNDWATER MONITORING REPORT 4TH QUARTER 2010

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TABLE 3 Page 6 of 9 WELL CONCENTRATIONS 4Q10 FORMER SHELL CENTRAL VALLEY CRUDE OIL PIPELINES NEIGHBORHOODS BCD MOUNTAIN HOUSE,CALIFORNIA TPHe TPHd Bemene Toluene Ethylbenzene Xylenes Naphthalene Sulfate Sulfur TOC WL Depth WL Elea ugh ugh ugh ugh ugh ugh ug/L ag/L ag/L ftAMSL ft AMSL ftAMSL Neighbourhood B MW5(C&D; 9/21/2009 - - - - - - - - - 96.68 31.68 65 MW-5(C&D, 9/30/2009 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 76 78.6 96.68 31.7 64.98 MWS(C&D;12/29/2009 - - - - - - - - - 96.68 31.75 64.93 0 <0 MW-5(C&D,12/30/2009 <250 <5 .50 <1.0 <1.0 <1.0 <10 - - - - - MWS(C&D, 3/25/2010 - - - - - - - - - 96.68 31.9 64.780 <0 MW-5(C&D; 3/26/2010 <250 <5 .50 <1.0 <1.0 <1.0 <10 - - - - - MW-5(C&D; 6/25/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 96.68 322 64.48 MW-5(C&D; 9/15/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 96.68 3231 64.37 MWS(C&D;12/27/2030 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 96.68 323 64.38 MW6(C&D; 9/21/2009 - - - - - - - - - 98.63 33.55 65.08 MW-6 0 <0 (C&D; 9/30/2009 <250 <5 .50 <1.0 <1.0 <1.0 <10 170 420 98.63 33.55 65.08 MW-6(C&D;12/29/2009 - - - - - - _ _ _ 98.63 33.61 65.02 MW6(C&De 12/30/2009 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - - - - MW6(C&D`3/25/2010 - - - - - - - - - 98.63 33.8 64.83 MW-6(C&D; 3/26/2010 <250 79 <0.50 <1.0 <1.0 <1.0 <10 - - - - - MW6(C&D; 6/25/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 98.63 33.95 64.68 MW-6(C&D; 9/15/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 98.63 34.15 64.48 MW-6(C&D,12/23/2030 - - - - - - - - - 98.63 37.03 61.6 MW-7(C&D; 9/21/2009 - - - - - - - - - 97.43 3268 64.75 MW-7(C&D; 9/30/2009 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 130 475 97.43 3261 64.82 MW-7(C&D;12/29/2009 - - - - - - - - - 97.43 3278 64.650 <0 MW-7(C&D,12/30/2009 <250 <5 .50 <1.0 <1.0 <1.0 <10 - - - - - MW-7(C&D;3/25/2010 - - - - - - - - - 97.43 329 6453 MW-7(C&D,3/26/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - - - - MW-7(C&D; 6/25/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 97.43 33.1 6433 MW-7(C&D, 9/15/2010 <250 <50 <0.50 <LO <1.0 <1.0 <10 - - 97.43 3329 64.14 MW-7(C&D,12/23/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 97.47 3335 64.08 MW-8(C&D; 9/21/2009 - - - - - - - - - 98.52 33.64 64.88 MWS(C&D, 9/30/2009 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 150 54.5 98.52 33.74 64.78 MW-8(C&D;12/29/2009 - - - - - - - - - 98.52 33.81 64.71 0 <0 MW-8(C&D;12/30/2009 <250 <5 .50 <1.0 <1.0 <1.0 <10 - - - - - MW-8(C&D;3/25/2010 - - - - - - - - - 98.52 36.95 61.57 MW-8(C&D; 3/ 26/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - - - - MW-8(C&D; 6/25/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 98.52 3282 65.7 MW-8(C&D; 9/15/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 98.52 34.3 64.22 MW-8(C&D,12/23/2010 <250 <50 <0.50 <1.0 <1.0 <1.0 <10 - - 98.52 34.53 63.99 1/11/mn.Y4Q@-6nOAnIATW GSapYA0.„ID16p