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Jamar Service 0 • December 2013 <br /> 4075 East Main Street, Stockton <br /> Claim No: 14482 <br /> Most Recent Concentrations of Petroleum Constituents in Soil <br /> Constituent Maximum 0-5 feet bgs Maximum 5-10 feet bgs <br /> m /k date m /k date <br /> Benzene NA NA <br /> Eth (benzene NA NA <br /> Naphthalene NA NA <br /> PAHs NA NA <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> mg/kg: Milligrams per kilogram, parts per million <br /> <: Not detected at or above stated reporting limit <br /> PAHs: Polycyclic aromatic hydrocarbons <br /> Most Recent Concentrations of Petroleum Constituents in Groundwater <br /> Sample Sample TPHg Benzene Toluene Ethyl- Xylenes MTBE 1,2 <br /> Date (pg/L) (Ng/L) (Ng/L) Benzene (pg/L) (Ng/L) DCA <br /> (jig/L) (p /L <br /> MW1 05/16/13 1,800 1.5 2.2 0.8 70 76 2.2 <br /> 9W1C 05/16/13 <50 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <br /> MW2 05/16/13 1,000 15 <10 <10 <20 1,800 46 <br /> MW3 05/16/13 180 <0.5 <0.5 <.0.5 <1 <0.5 <0.5 <br /> MW3C 05/16/13 <50 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <br /> MW4 05/16/13 3,200 <2.5 <2.5 <2.5 <5 200 24 <br /> MW6a 05/16/13 <50 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <br /> MW6b 05/16/13 <50 <1 <1 <1 <2 <0.5 5.6 <br /> MW6C 05/16/13 <50 <10 <10 <10 <20 2,200 47 <br /> MW7a 09/29/10 <50 <0.5 <0.5 <0.5 <1 <0.5 <5 <br /> MW7b 05/16/13 <50 <2.5 <2.5 <2.5 <5 150 16 <br /> MW7C 12/13/12 <50 <0.5 <0.5 <0.5 <1 640 7.1 <br /> MW8 05/16/13 <50 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <br /> MW9a 09/29/10 <50 <0.5 <0.5 <0.5 <1 <0.5 <5* <br /> MW9b 09/29/10 <50 <0.5 <0.5 <0.5 <1 <0.5 <5* <br /> MW9C 09/29/10 <50 <0.5 <0.5 <0.5 <1 <0.5 <5* <br /> MW10a 05/16/13 <50 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <br /> MW10b 05/16/13 <50 <2.5 <2.5 <2.5 <51 400 1.2 <br /> MW10C 05/16/13 <50 <0.5 <0.5 <0.5 <1 46 1.2 <br /> MW11C 05/16/13 <50 <0.5 <0.5 <0.5 <1 <0.5 N<O.5MW12a 05/16/13 360 52 0.8 29 3 130 EW1 05/16/13 <50 <0.5 <0.5 <0.5 <1 <0.5 WQO 5 0.15 42 29 17 5 <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> pg/L: Micrograms per liter,parts per billion <br /> <: Not detected at or above stated reporting limit <br /> TPHg: Total petroleum hydrocarbons as gasoline <br /> MTBE: Methyl tert-butyl ether <br /> 1,2 DCA: 1,2 Dichloroethane <br /> WQOs: Water Quality Objectives, Regional Water Board Basin Plan <br /> *: Sample collected and analyzed 12/07/09 <br /> Page 8 of 14 <br />