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Port of Stockton - 2 - May 2012 <br /> Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> Oct 2011 <br /> MW3-1 Jul 99 10-35 11.15 <br /> MW3-2 Jul 99 10-35 10.95 <br /> MW3-3 Jul 99 9-34 10.57 <br /> MW3-4 Feb 03 10-24 11.72 <br /> MW3-5 Feb 03 10-24 10.55 <br /> MW3-6 Feb 03 10-24 10.20 <br /> MW3-7 May 07 8-28 10.96 <br /> MW3-8 May 09 10-25 11.76 <br /> MW3-9 May 09 10-25 10.02 <br /> MW3-10 May 09 33-43 10.05 <br /> Petroleum H drocarbon Constituent Concentration <br /> Contaminant Soil m /k Water (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> a Oct 2011 <br /> TPI-Ig 5,100 NA 56,000 10,000 5 <br /> Benzene 18 NA 5,400 1,200 0.15 <br /> Toluene 250 NA 10,000 1,600 42 <br /> Eth (benzene 120 NA 1,700 310 29 <br /> Xylenes 650 NA 7,800 1,200 17 <br /> MTBE ND NA <50 <50 5 <br /> TBA ND NA 130 12 12/1,200 <br /> 1,2-DCA NA NA NA <50 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 /> a According to GeoTracker, wells <br /> b California Department of Public Health Notification Level/ Response Level <br /> Site Description <br /> The Site is located at the intersection of Port Road 14 at G Street in Stockton, California and is <br /> an active bulk fuel storage facility. The Site is bounded by an above ground tank fuel storage <br /> farm to the west, Port Road H to the north and east and Port Road G to the south. The <br /> surrounding land use is commercial and industrial. <br /> Site History/Assessments <br /> In February 1988, soil contamination was identified during the removal of USTs. To date, ten <br /> monitoring wells have been installed and monitored regularly. A Site map showing the location <br /> of the former UST basin, monitoring wells and groundwater level contours is provided at the end <br /> of this five year summary. <br />