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4 <br /> Table A-2 <br /> Ozone Injection -Groundwater Monitoring Data <br /> ConocoPhillips Service Station #11195 <br /> 16500 South Harlan Road, Lathrop, California <br /> Monitoring,W6[I::MW-3 Monitoring Well:MW-10 <br /> Ethyl Xylenes Ethyl- Xylenes <br /> ORP TPHg Benzene` Toluene benzene (total) MtBE ORP TPHg Benzene Toluene benzene (total) MtBE <br /> Date... my (�sl�r (ugA).` (>,gA.) (Pwl) (hgn) (hgn) mu (ugn) (NsA) (Nsn) (u9A) <br /> 11/18/2002 a - <500 <5.0 <5.0 <5.0 <10.0 1,300 - <500 <5.0 <5.0 <5.0 <10.0 860 <br /> 2113/2003 a - <500 <5.0 <5.0 <5.0 <10.0 1,500 -- <50 <0.50 <0.50 <0.50 <1_0 53 <br /> 3/21/2003 a - 320 <0.50 0.60 <0.50 <0.50 1,700 - <50 <0.50 <0.50 <0.50 <1.0 5.1 <br /> 4/22/2003 a - 6,700 <2.5 <2.5 <2.5 <2.5 4,400 -- <50 <0.50 <0.50 <0.50 <0.50 <0.50 <br /> 5/12/2003 a -- <1,000 <10.0 <10.0 <10.0 <20.0 1,300 - <50 <0.50 <0.50 <0.50 <1.0 <2.0 <br /> 6/20/2003 a - 1401 <0.50 <0.50 <0.50 <0.50 180 - <50 <0.50 <0.50 <0.50 <0.50 1.5 <br /> 9/23/2003 -- 11,000 <50 <50 <50 <50 13,000 - <50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 10/31/2003 - <5000 <50 <50 <50 <100 6,700 -- <50 <0.50 2.4 <0.50 2.0 0.60 <br /> 1/20/2004 100 630 <5 <5 <5 <10 1,100 142 <50 <0.50 <0.5 <0.50 <1 <2 <br /> Definitions: Notes: <br /> TPHg=Total petroleum hydrocarbons as gasoline a =Sampled by Gettler-Ryan, Inc. <br /> MtBE=Methyl tert-butyl ether b =Hydrocarbon in gasoline range does not match laboratory gasoline standard. <br /> ppb=Parts per billion - =Data not available <br /> ORP=Oxidation Reduction Potential <br />