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Roek Construction -6 - September 2012 <br /> Claim No. 7881 <br /> Petroleum Hydrocarbon Constituent Concentration <br /> Contaminant Soil m /k Water /L WQOs <br /> Maximum Latest Maximum Latest (Ng/L) <br /> Feb 2012 <br /> TPHg NA NA 270,000 100,000 5 <br /> Benzene NA NA 26,000 15,000 0.15 <br /> Toluene NA NA 44,000 19,000 42 <br /> Eth (benzene NA NA 4,100 2,500 29 <br /> Xylenes NA NA 41,000 11,700 17 <br /> MTBE NA NA 210,000 150 5 <br /> TBA NA NA 600 600 1,200 <br /> 1,2 DCA NA NA 3,1001 9101 0.5 <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> mg/kg: milligrams per kilogram, parts per million <br /> ug/L: micrograms per liter, parts per billion <br /> WQOs: Water Quality Objectives,Region 5 Basin Plan <br /> 'According to GeoTracker,wells <br /> California Department of Public Health Response Level <br />