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TABLE 2 <br /> GROUNDWATER ANALYTICAL RESULTS(TPH,BTEX,and MTBE) <br /> VERNALIS PUMP STATION <br /> Vernalis,California <br /> Concentrations reported inµg/L unless noted <br /> Abbreviations: <br /> D=Duplicate sample;labeled differently on chain-of-custody <br /> DRO=Diesel-range organics <br /> E=Indicates the reported value is estimated due to the associated quality control results <br /> ESL=Environmental Screening Level <br /> ID=Identification <br /> J=Indicates the reported value is an estimated concentration detected between the method detection limit and limit of quantitation <br /> LCS/LCSD=Laboratory control sample/laboratory control sample duplicate <br /> MCL=Maximum contaminant level <br /> MTBE=Methyl tertiary butyl ether <br /> MW=Monitoring well <br /> NA=Not analyzed <br /> NS=Not sampled <br /> QC=Quality control <br /> RWQCB=Regional Water Quality Control Board <br /> SPO=Separate-phase oil <br /> TPH=Total petroleum hydrocarbons <br /> TPHd=TPH(CIO to C,5)quantified as diesel <br /> TPHdsg=TPHd with silica-gel preparation <br /> TPHg=TPH(C6 to Cl,)quantified as gasoline <br /> TPHmo=TPH quantified as motor oil <br /> U=Indicates the analyte was not detected,or was detected at a concentration that is attributed to cross-contamination <br /> µg2=Micrograms per liter <br /> WQO=Water Quality Objective <br /> Notes: <br /> Values in bold exceeds either the WQO or ESL or both. <br /> *Starting with the second quarter 2006,laboratory analytical data are being qualified and flagged as appropriate. Please see the <br /> respective Data Usability Summary section of the reports for detailed information on the qualifiers used. <br /> I. WQO(Tastes and Odors)that prohibits adverse tastes and odors or nuisance conditions. <br /> 2. WQO(Toxicity)that prohibits toxic chemicals in toxic amounts. <br /> 3. WQO(Chemical Constituents)that requires compliance with California drinking water MCLS and generally prohibits adverse effects on beneficial uses. <br /> 4. ESL(for protection or current or potential drinking water resource)based on Ceiling Value. <br /> 5. ESL in groundwater for human health protection,based on direct contact exposure pathways and the California Primary MCL. <br /> 6. ESL(for protection or current or potential drinking water resource)based on Drinking Water Toxicity. <br /> 7. Not sampled due to the presence of SPO. <br /> 8. The observed sample pattern includes#2 fuel/diesel and an additional pattern that elutes later in the DRO range. <br /> 9. The observed sample pattern includes#2 fuel/diesel and individual peaks eluting in the DRO range. <br /> 10.The surrogate recoveries for the LCS/LCSD associated with this sample were outside QC limits.Since the surrogate spike recoveries for the project samples <br /> were within limits,the data was reported. <br /> 11.The volume of water in the well was insufficient for sample collection. <br /> 12. Not monitored on a quarterly basis per RWQCB. <br /> 13.The observed pattern in not typical of#2 fuel/diesel.It elutes in the DRO range later than#2 fuel. <br /> 14. Well damaged;not monitored/sampled. <br /> 15.The observed pattern in not typical of#2 fuel/diesel.The reported result is due to grouping of peaks eluting in the DRO range. <br /> 16.Well not accessible. <br /> Sources: <br /> ESLs from Screening for Environmental Concerns at Sites with Contaminated Soil and Groundwater(Interim Final),San Francisco Bay RWQCB(May 2008 update). <br /> WQOs from Water Quality Control Plan(Basin Plan)for the Sacramento River Basin and the San Joaquin River Basin,4th ed.(revised August 2006). <br /> A=MFrll 4­ <br /> Page 4 of 4 <br /> From Science to Solutions <br />