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TABLE 3 <br /> SUMMARY OF GROUNDWATER ANALYTICAL RESULTS(TPHd and BTEX) <br /> AHERN ROAD-VERNALIS <br /> Vernalis,San Joaquin County, California <br /> Concentrations inµg/L <br /> Boring/ Collection Date Ethyl- Total <br /> Well ID Method Sampled TPHd TPHds Benzene Toluene benzene Xylenes <br /> GREENING WQO 100 4 100 4 0.15 5 42 4 29 4 17 4 <br /> LEVELS ESL 100 " 100 6 1 7 40 6 30 6 20 6 <br /> SB-2 IIP 8 3/5/2012 250 190 <0.5 <0.5 <0.5 <0.5 <br /> SB-4 ggw 9/10/2012 <100 NA <0.5 <0.5 5.7 28 <br /> SB-413 ggw 9/10/2012 <110 NA <0.5 <0.5 5.8 28 <br /> SB-5 99W 9/28/2012 99 J <110 <0.5 <0.5 <0.5 <0.5 <br /> SB-6 99W 9/28/2012 660 E <110 <0.5 <0.5 <0.5 <0.5 <br /> SB-7 99W 12/13/2012 <100 NA <0.5 <0.5 <0.5 <0.5 <br /> SB-8 ggw 12/13/2012 <100 NA <0.5 <0.5 <0.5 <0.5 <br /> SB-9 ggw 12/14/2012 <100 NA <0.5 <0.5 <0.5 <0.5 <br /> Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> D=Duplicate sample <br /> E=Estimated value based on surrogate recovery levels <br /> EPA=United States Environmental Protection Agency <br /> ESL=Environmental Screening Level <br /> ggw =Grab groundwater <br /> HP=Hydropunch <br /> ID=Identification <br /> J=Estimated concentration detected between MDL and LOQ <br /> LOQ=Limit of Quantitation <br /> MCL=Maximum Contaminant Level <br /> RWQCB=Regional Water Quality Control Board <br /> SAIC=SAIC Energy,Environment&Infrastructure,LLC <br /> TPHd=Total petroleum hydrocarbons quantified as diesel,C10-C25 <br /> TPHdsg=Total petroleum hydrocarbons quantified as diesel with silica-gel cleanup. <br /> WQO=Water Quality Objective <br /> <=Denotes analyte not detected at or above the LOQ <br /> µg/L=Micrograms per liter <br /> Notes: <br /> 1. Samples were collected by SAIC and analyzed by Lancaster Laboratories,Inc. TPHd were analyzed using EPA Method 8015 <br /> Modified performed both with and without a silica gel-preparation procedure. BTEX were analyzed using EPA Method 8260B <br /> 2. Results in bold exceed WQOs and/or ESLs. <br /> 3. See Attachment D for data usability summary. <br /> 4. WQO(Tastes and Odors)that prohibits adverse tastes and odors or nuisance conditions. <br /> 5. WQO(California Public Health Goal for Drinking Water). <br /> 6. ESL(for protection or current or potential drinking water resource)based on Ceiling Value. <br /> 7. ESL(for protection or current or potential drinking water resource)based on Drinking Water Toxicity. <br /> 8. Depth-discrete sample collected at 84 feet below ground surface. Groundwater sample not collected <br /> from first encountered water-bearing zone due to presence of separate phase oil. <br /> Sources: <br /> WQOs defined in the Central Valley RWQCB Water Quality Control Plan(Basin Plan)for the Sacramento River Basin and <br /> San Joaquin River Basin (Fourth Edition),October 2007. <br /> WQOs may be stated in either numerical or narrative form. Narrative water quality objectives are interpreted by values <br /> from SWRCB A Compilation of Water Quality Goals 16th edition-April 2011. <br /> ESLs from the San Francisco Bay RWQCB Screening for Environmental Concerns at Sites with Contaminated Soil and <br /> Groundwater (Interim Final),May 2008. <br /> Page 1 of 1 SAIC <br />