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TABLE 1 <br /> SUMMARY OF SOIL ANALYTICAL RESULTS(TPH and BTEX)t z s <br /> AHERN ROAD-VERNALIS <br /> Vernalis,San Joaquin County,California <br /> Concentrations in mg/kg <br /> Sample <br /> Depth I Date Ethyl- Total <br /> BoringID ft b Sampled TPHc Benzene Toluene benzene I Xylenes <br /> SCREENING RSL - 0.00023° 0.76 s 0.0019° 0.23° <br /> LEVELS ESL 370 7 0.044 s 2.9 6 2.3 6 2.3 6 <br /> SB-1 8 2/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-I 19.5 2/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-I 37 2/28/2012 2,800 <0.25 <0.25 <0.25 <0.25 <br /> S13-2 5 2/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-2 20 3/5/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-2 42 3/5/2012 560 <0.005 <0.005 <0.005 <0.005 <br /> SB-2 84 3/5/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-3 5 2/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-3 20 3/5/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-3 52 3/5/2012 850 <0.005 <0.005 <0.005 <0.005 <br /> S134 5 9/10/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB4 17 9/10/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> S13-4 32 9/10/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-5 4 9/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-5 19.5 9/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-5 33 9/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-6 4 9/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-6 19.5 9/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-6 36 9/28/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-7 5 12/10/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-7 30 12/13/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-8 5 12/10/2012 <12 <0.005 <0.005 <0.005 <0.005 <br /> SB-8 30.5 12/13/2012 <12 <0.005 <0.005 <0.005 <0,005 <br /> SB-9 5 12/10/2012 <12 70.005 1 <0.005 <0.005 <0.005 <br /> SB-9 27 12/14/2012 <12 70.005 <0.005 <0.005 <0.005 <br /> Abbreviations <br /> bgs=Below ground surface <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> EPA=United States Environmental Protection Agency <br /> ESL=Environmental Screening Level <br /> ft=Feet <br /> ID=Identification <br /> LOQ=Limit of Quantitation <br /> MCL=Maximum Contaminant Levels <br /> MDL=Method Detection Limit <br /> mg/kg=Milligrams per kilogram <br /> RSL=Regional Screening Level <br /> RWQCB=Regional Water Quality Control Board <br /> SAIC=SAIC Energy,Environment&Infrastructure,LLC <br /> TPHc=Total petroleum hydrocarbons quantified as crude oil <br /> <=Denotes analyte not detected at or above the LOQ <br /> ---=Not available <br /> Notes: <br /> I. Samples were collected by SAIC and analyzed by Lancaster Laboratories,Inc.for TPHc using EPA Method <br /> 8015B modified(CIO-C36)and BTEX using EPA Method 8260B. <br /> 2. Results in bold exceed RSLs and/or ESLs. <br /> 3. See Attachment D for data validation results. <br /> 4. Risk-based screening level for protection of groundwater. <br /> 5. MCL-based screening level for protection of groundwater. <br /> 6. ESL"Leaching to Groundwater"concentration in soil for the protection of groundwater(drinking water source), <br /> based on ceiling value. <br /> 7. ESL Direct Exposure(Human Health) <br /> 8. ESL"Leaching to Groundwater"concentration in soil for the protection of groundwater(drinking water source), <br /> based on concentration modeled to leach to groundwater at or above the health-based screening level <br /> Sources: <br /> RSLs from EPA Regional Screening Levels(RSL)for Chemical Contaminants at Superfund Sites,September 2008 <br /> ESLs from the San Francisco Bay RWQCB Screeningfor Environmental Concerns at Sits with Contaminated <br /> Soil and Groundwater(Interim Final May 2008). <br /> Page 1 of 1 SAIE <br />