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TAH SUMMARY OF GROUNDWATER. US CAN-W Vernalis,San Joaqu- Concentra C c v c v � i a yCOa a, C 4 Boring/ Collection Date v v o Well ll) Method Sampled RU Ru Q cc SCREENING WQO 20° --- 2,100 5 0.04 6 0.0029 6 0.04 6 --- 1 LEVELS ESL 20 10 30 11 0.73 1' 0.027 11 0.014 'l 0.029 11 0.10 11 0. SB-44 99W 7/20/2010 <0.010 <0.010 <0.010 <0.010 0.0032 E <0.010 E <0.010 <0 SB-44 D 99W 7/20/2010 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0 SB-45 99W 7/22/2010 <0.010 <0.010 <0.010 0.013 0.0094 E 0.012 E 0.01 <0, S13-46 7/21/2010 <0.010 <0.010 <0.010 <0.010 0.0036 E <0.010 E <0.010 <0 SB-47 7/21/2010 0.27 0.02 0.01 0.024 0.021 E 0.022 E 0.018 <0 Abbreviations: Notes: Cal/EPA=California Environmental Protection Agency 1. PAHs were analyzed b D=Duplicate Sample surrogate standard recc E=Estimated value based on surrogate recovery levels statistical limits. EPA=United States Environmental Protection Agency 2. Results in bold exceed ESL=Environmental Screening Level 3. See Appendix F for da ggw =Grab groundwater 4. WQO-Taste and Odo GC/MS=Gas chromatography/mass spectrometry 5. WQO-Toxicity(EPA ID=Identification 6. WQO-Toxicity(Calk IRIS=Integrated Risk Information System 7. WQO-Toxicity(EPA LVI=Large-volume injection 8. WQO-Toxicity(EPA PAHs=Polynuclear aromatic hydrocarbons 9. WQO-California Stat QC=Quality control 10.ESL-Taste and Odor RWQCB=Regional Water Quality Control Board 11.ESL-Aquatic Habitat SIM=Selective ion monitoring 12.ESL-Toxicity(Drink SWRCB=State Water Resources Control Board WQO=Water Quality Objective Sources: ---=Not available WQOs defined in the Cer <=Denotes analyte not detected at or above the laboratory reporting limit WQOs may be stated in e gg/L=Micrograms per liter from SWRCB A Compl ESLs from the San Franci (Interim Final),May 2 Page