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Page 10 of 10 <br /> Table 1. Total Extractable Petroleum Hydrocarbons as Diesel Groundwater Analytical Results <br /> UPRR Former Maintenance Facility,Tracy, California <br /> Cleanup Levels Total Petroleum 100 700 <br /> (CAO 92-707) Hydrocarbons <br /> Monitoring Well Sample Date TEPH-d (pg/L) TEPH-d SGa (Ng/L) Notes <br /> Dup continued 11/29107 FP FP <br /> 03/20/08 FP FP <br /> 11/21/08 FP FP ' <br /> 03/16/09 FP FP <br /> 11/19109 FP FP <br /> 03/16/10 FP FP <br /> Notes: <br /> a Samples with detectable TEPH as diesel were reanalyzed using a silica gel cleanup sample preparation. <br /> b Sample results qualified due to samples exceeding temperature range upon receipt at the laboratory. <br /> ° Sample results qualified due to high surrogate recoveries. <br /> a Reported as an unknown hydrocarbon within the diesel range. <br /> pg/L=Micrograms per liter. , <br /> Values in bold type exceed the cleanup level of 100 pg1L for TEPH diesel as stated in CA Regional Water Quality <br /> Control Board, Central Valley Region Cleanup and Abatement Order(CAO) 92-707. <br /> Silica gel cleanup performed using United States Environmental Protection Agency(USEPA) Method 36300. <br /> DUP =Duplicate sample. <br /> FP =Free product present; no sample collected. <br /> NA= Not analyzed. ' <br /> NDS= Denotes constituent not detected at or above reporting limit listed after the less-than sign. <br /> SG =silica gel cleanup preparation. <br /> TEPH-d=Total extractable petroleum hydrocarbons as diesel. <br /> TEPH-d analyzed using USEPA Method 8015B. , <br /> Data Qualifiers(Laboratory) <br /> a=The diesel pattern appears degraded. <br /> x= Results within quantitation range; chromatographic pattern not typical of fuel. <br /> h= Sample analyzed outside the recommended holding time. ' <br /> G =The reporting limit is elevated due to matrix interference. <br /> Surrogate recovery is outside stated control limits. <br /> Data Qualifiers(Quality Assurance Review of Sample Data Collected Before December 2006). <br /> J = Detected value considered estimated based on quality assurance review. <br /> NJ =Estimated value-chromatogram did not resemble the standard hydrocarbon pattern. <br /> UJ =Compound not detected at an estimated value based on quality assurance review. <br /> Data Qualifiers(Quality Assurance Review of Sample Data Collected After March 2005). ' <br /> U =The analyte was analyzed for, but was not detected above the level of the adjusted Contract-Required <br /> Quantitation Limit(CRQL)for the sample and method. <br /> J =The analyte was positively identified-,the associated numerical value is the approximate concentration of <br /> the analyte in the sample. ' <br /> f <br /> UWAMES EISERTIT.W.1-S!—UPRR-Tracy-RC000709.)dsATable 1 <br /> 1172912010 <br />