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1-4 <br />V <br />Sara Lee Baking Co. k . - 2 - ` l August 16, 2011 <br />• Groundwater Flow Direction: Predominately to the east with an average gradient of <br />0.002 feet/foot. <br />• Soil Types: The Site is underlain by interbedded and intermixed sand, silt and clay <br />Monitoring Well Information <br />Well Designation <br />Date Installed <br />Screen Interval <br />(feet bgs) <br />Depth to Water <br />(feet bgs) <br />(April 2011 <br />MW -1 <br />Jul 87 <br />31-76 <br />31.70 <br />MW -2 <br />Sep 87 <br />23-53 <br />30.68 <br />MW -3 <br />Sep 87 <br />25-55 <br />31.65 <br />MW -4 <br />Jun 88 <br />23-53 <br />31.36 <br />MW -5 <br />Jun 88 <br />23-53 <br />31.02 <br />MW -6 <br />Feb 98 <br />30-55 <br />30.09 <br />MW -7 <br />Feb 98 <br />30-55 <br />31.82 <br />MW -8 <br />Sep 90 <br />35.60 <br />31.74 <br />MW -9 <br />Mar 94 <br />34-74 <br />30.50 <br />MW -10 <br />Mar 94 <br />34-74 <br />31.37 <br />MW -11 <br />Mar 94 <br />32-72 <br />31.30 <br />MW -12 <br />Mar 94 <br />34-74 <br />31.68 <br />MW -13 <br />Mar 94 <br />34-74 <br />31.71 <br />SP -1 <br />Mar 02 <br />68-70 <br />31.23 <br />SP -2 <br />Sep 94 <br />70-75 <br />31.45 <br />SP -3 <br />Jun 95 <br />70-75 <br />31.41 <br />SP -4 <br />Jun 95 <br />70-75 <br />31.30 <br />SP -5 <br />Jun 95 <br />70-75 <br />31.32 <br />SP -6 <br />Jun 95 <br />70-75 <br />31.65 <br />PZ -1 <br />Sep 94 <br />25-65 <br />31.23 <br />PZ -2 <br />Sep 94 <br />25-65 <br />31.46 <br />Petroleum Hvdrocarbon Constituent Concentration <br />Contaminant <br />Soil <br />m /k <br />/L <br />WQOs <br />Maximum <br />Latest <br />'Water(u <br />Maximum <br />Latest <br />Aril 2011 <br />(ug/L) <br />TPHg <br />NA <br />NA <br />196,000 <br />18,000 <br />5 <br />Benzene <br />NA <br />NA <br />7,100 <br />1,500 <br />0.15 <br />Toluene <br />NA <br />NA <br />17,500 <br />340 <br />42 <br />Eth (benzene <br />NA <br />NA <br />1,840 <br />710 <br />29 <br />Xylenes <br />NA <br />NA <br />15,300 <br />2,400 <br />17 <br />MTBE <br />NA <br />NA <br />40 <br />NA <br />5 <br />TBA <br />NA <br />NA <br />47,000 <br />NA <br />12/1,200a <br />1,2 -DCA <br />NA <br />NA <br />18 <br />2.7 <br />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 <br />* According to GeoTracker, wells <br />a California Department of Public Health Notification Level/ Response Level <br />