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' TABLE 3 <br /> GROUNDWATER ANALYTICAL RESULTS(TPHd,TPHdsg,BTEX,AND TDS)1,2,3 <br /> TRACY BYRON ROAD <br /> Tracy,California <br /> Date11 FF <br /> Concentrations reported in pg/L <br /> E[hyl- Total <br /> Borin ID Collected TPHd TPHds Benzene Toluene benzene Xylenes TDS <br /> ' SCREENING WQO 1001 1004 0.15 s 4 4 a 6 <br /> 42 29 17 3.000,000 <br /> LEVELS ESL 1007 100 r 1 x 40 30 r 20 7 <br /> SB-37 3/13/2007 100 <50 <0.1 <1.0 d.0 <1.0 1,980,000 <br /> SB-38 3/13/2007 140 <50 -<0 1 160 <1.0 <1.0 <1.0 2,180,000 <br /> SB-39 3/12/2007 <73 <0.1 <L <1.0 <1.0 NA <br /> SB-40 3/12/2007 330 <73 <0.1 <1.0 <I.0 <1.0 NA <br /> SB-41 3/12/2007 330 <73 -<0 1 <br /> ' Abbreviations: <br /> <=Denotes analyte not detected at or above the laboratory reporting limit <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> ' EPA=U.S.Environmental Protection Agency <br /> ESL=Environmental Screening Level <br /> ID=Identification <br /> ' Lancaster=Lancaster Laboratories,Inc. <br /> MCL=Maximum contaminant level <br /> RWQCB=Regional Water Quality Control Board <br /> SAIC=Science Applications International Corporation <br /> ' TDS=Total dissolved solids <br /> TPHd=Total petroleum hydrocarbons quantified as diesel,Cm-Cts <br /> TPHdsg=TPHd with silica-gel cleanup <br /> pg/L=Micrograms per liter <br /> WQO=Water Quality Objective <br /> Notes: <br /> I. Samples were collected by SAIC and analyzed by Lancaster. TPHd were analyzed using EPA Method 8015 Modified <br /> performed both with and without a silica gel-preparation procedure. BTEX were analyzed using EPA Method 8260B. <br /> TDS were analyzed using EPA Method 160.1. <br /> 2. Results presented in bold exceed WQOs and/or ESLs. <br /> 3. See Appendix DA for data validation results. <br /> 4. WQO(Tastes and Odors)that prohibits adverse tastes and odors or nuisance conditions. <br /> 5. WQO(Toxicity)that prohibits toxic chemicals in toxic amounts. <br /> 6. Criterion promulgated under State Water Resources Control Board Resolution No.88-63 for beneficial use designation of <br /> Municipal and Domestic Supply; incorporated in the Basin Plan by reference(see source below). <br /> 7. ESL(for protection or current or potential drinking water resource)based on Ceiling Value. <br /> ' 8. ESL(for protection or current or potential drinking water resource)based on Drinking Water Toxicity. <br /> Sources: <br /> ESLs from Screening far Environmental Concerns at Sites with Contaminated Soil and Groundwater (Interim Final), <br /> ' San Francisco Bay RWQCB(February 2005). <br /> WQOs from Water Quality Control Plan(Basin Plan)for the Sacramento River Basin and the San Joaquin River Basin,4th ed. <br /> (Revised August 2006). <br /> 1 <br /> Page 1 of I F� ta`g <br />