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TABLE 3 GROUNDWATER ANALYTICAL RESULTS-PAHs VERNALIS PUMP STATION Vernalis,California Concentrations reported in pg/L unless noted Benzo(b)- Benzo- Benzo(k)- Dibenz(a,h) Indeno- Date Acenaph- Acenaph- Anthra- Benzo(a)- Benzo(a)- fluoran- (g,h,i)- fluoran- Chrys- anthra- Fluoran- Fluor- (1,2,3-cd)- Naph- Phenan- Pyr- Sample ID Collected thene thylene cene anthracene pyrene thene perylene thene ene cene thene ene pyrene thalene threne ene SCREENING WQO 20 1 --- 2100 2 0.04 z 1 0.004 2 0.04 2 --- 0.04 2 0.4 2 0.0085 2 280 2 280 z 0.04 z 210 2 LEVELS ESL 20 3'5'6 30 5,6,7 0.73 5,6,7 0.027 5,6'7 0.014 6,7 0.029 4'5'6'' 0.1 5'6,7 0.029 4,6 0.049 4,6 0.0085 4,6 8 5,6,7 3.9 5,6,7 0.029 4,5'6'7 7 2 5'7 :10" MW-5 05/04/06* <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 0.010 J <0.01 <0.02 (cont.) 08/10/0610 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS 11/07/0610 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS 01/24/07 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 0.064 <0.01 <0.02 05/08/07 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 0.012 J <0.01 <0.01 MW-6 07/19/05 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 <0.01 0.02 <0.02 10/18/05 <0.009 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.009 <0.02 <0.02 <0.009 <0.009 <0.02 0.02 <0.009 <0.02 01/25/06 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 <0.01 <0.01 <0.02 01/25/06D <0.01 <0.02 <0.02 <0.02 <0.02 0.044 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 <0.01 <0.01 <0.02 05/04/06* <0.009 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.009 <0.02 <0.02 <0.009 <0.009 <0.02 0.014 J <0.009 <0.02 08/10/06 <0.009 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.009 <0.02 <0.02 <0.009 <0.009 <0.02 <0.009 <0.009 <0.02 11/07/06 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 <0.01 <0.01 <0.02 11/07/06D <0.009 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.009 <0.02 <0.02 <0.009 <0.009 <0.02 <0.009 <0.009 <0.02 01/24/07 <0.01 <0.02 <0.02 0.054 0.030 J 0.075 0.073 0.074 0.069 0.075 0.035 J <0.01 0.073 0.032 J 0.022 J 0.033 J 01/24/07D <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 0.017 J <0.01 <0.02 05/01/07 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 MW-7 07/19/05 0.05 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 0.04 0.01 <0.02 10/18/05 0.2 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 0.01 0.02 <0.02 0.06 0.06 <0.02 01/25/06 0.024 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 0.019 <0.02 0.046 <0.01 <0.02 05/04/06* 0.22 E <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.009 <0.02 <0.02 <0.009 0.023 J <0.02 0.023 J 0.039 J 0.025 J 05/04/06D 0.059 J <0.02 E <0.02 E <0.02 E <0.02 E <0.02 E <0.02 E <0.009 E <0.02 E <0.02 E <0.009 E <0.009 E <0.02 E <0.009 E 0.014 J <0.02 E 08/10/06 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 <0.01 <0.01 <0.02 08/10/06D <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 <0.01 <0.02 <0.01 <0.01 <0.02 11/07/06 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 0.010 J <0.02 0.027 J <0.01 <0.02 01/24/07 0.033 J <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.009 <0.02 <0.02 <0.009 <0.009 <0.02 0.050 <0.009 <0.02 05/01/07 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 05/01/07D <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Abbreviations: Notes: <=Analyte not detected at or above the laboratory reporting limit shown Values in Bold exceeds either the WQO or ESL or both. D=Duplicate sample(labeled differently on chain-of-custody form) *Starting with the second quarter 2006,laboratory analytical data are being qualified and flagged as appropriate.Please see the respective Data Usability Summary DTW=Depth to water section of the reports for detailed information on the qualifiers used. E=Indicates the reported value is estimated due to quality control results. 1. WQO(Tastes and Odors)that prohibits adverse tastes and odors or nuisance conditions. ESL=Environmental Screening Level 2. WQO(Toxicity)that prohibits toxic chemicals in toxic amounts. ID=Identification 3. ESL for groundwater protection(drinking water source),based on"Ceiling Level(Nuisance/Aesthetic Concerns)." J=Indicates the reported value is an estimated concentration detected between the method detection limit and limit of quantitation. 4. ESL in groundwater for human health protection,based on direct contact exposue pathways and the California Primary MCL. MCL=Maximum Contaminant Level 5. ESL in groundwater for the protection of ecological receptors. MW=Monitoring well 6. ESL in surface water for protection of human health. NS=Not sampled 7. ESL in surface water for protection of ecological receptors. PAHs=Polynuclear aromatic hydrocarbons 8. Not sampled due to the presence of SPO. RWQCB=Regional Water Quality Control Board 9. There was insufficient volume of water in the well for sample collection. SPO=Separate-phase hydrocarbon 10.Well not accessible. WQO=Water Quality Objective Sources: gg/L=Micrograms per liter ESLs from"Screening for Environmental Concerns at Sites with Contaminated Soil and Groundwater"(Interim Final),San Francisco Bay RWQCB(February 2005). Most conservative levels are used. WQOs from"Water Quality Control Plan(Basin Plan)for the Sacramento River Basin and the San Joaquin River Basin,"4th ed. (WQOs used are the most conservative outlined in the letter from RWQCB dated April 16,2004-Appendix A-Reports Tri-Regional Board Staff Recommendations for Preliminary Investigation and Evaluation of Underground Tank Sites.) From&,ert em Solutions Page 2 of 2