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TABLE 3 <br /> GROUNDWATER CHEMICAL ANALYTICAL RESULTS (PAHs; <br /> US CAN-WELTY ROAD <br /> Vernalis, California <br /> Concentrations reported inµg2 <br /> a y as41 <br /> y < <br /> v w w i� Q <br /> y Ci` <br /> a �� c u <br /> w 4 P. 97 <br /> N i <br /> Date a°, a a a a Q ° ° °' 41 i <br /> Sample ID Collected Q' 44Ci q� ti Z a� <br /> SCREENING WQO 20 2 --- 2100 3 0.04 3 0.004 3 0.04 3 --- 0.04 3 0.4 3 0.0085 3 280 3 280 3 0.04 3 21 2 --- 210 3 <br /> LEVELS 20 4'5'6 30 5'6'' 0.73 5'6'' 0.027 5'6'' 0.014 5'6 0.029 5'6'''8 0.1 5'6'' 0.029 6'8 0.049 6'8 0.0085 6'8 8 5'6'' 3.9 5'67 0.029 5'6'''8 17 6'8 4.6 5'6'' 2 5'' <br /> MW-5 04/30/07 <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 0.014 J <0.01 <0.01 <br /> (cont.) 8/7/200712 NS NS NS NSA NS NS NS NS NS NS NS NS NS NS NS NS <br /> Sampling discontinued on 8/21/2007 per California Regional Water Quality Control Board re, <br /> 11/10/99 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND <br /> 05/21/02 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND <br /> 08/07/03 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS <br /> 04/21/05 <0.01 <0.01 <0.01 <0.01 <0.005 <0.01 <0.01 <0.01 <0.01 <0.005 <0.01 <0.01 <0.01 0.025 0.011 <0.01 <br /> 07/27/05 <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 <0.009 <0.009 <0.02 <br /> 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 0.01 <0.02 <0.009 <0.009 <0.02 <br /> 02/14/06 <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 0.025 <br /> WFSMW-1 la <br /> 05/03/06 <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 <br /> 05/03/06D <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 <br /> 08/16/06 <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 0.013 J <0.02 <br /> 08/16/06D <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 0.013 J <0.02 <br /> 11/08/06 <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 0.054 <0.01 <0.02 <br /> 01/23/07 <0.01 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.01 <0.02 <0.02 <0.01 0.016 <0.02 0.048 <0.01 0.032 <br /> 04/30/07 <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 0.032 J <0.01 0.019 J <br /> 8/7/200712 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS <br /> Sampling discontinued on 8/21/2007 per California Regional Water Quality Control Board rei <br /> Abbreviations: Notes: <br /> <=Analyte not detected at or above the laboratory reporting limit shown Values in Bold exceeds either the WQO or ESL or both. <br /> D=Duplicate sample *Starting with the second quarter 2006,laboratory analytical data are being qualified and flagged as appropriate. Please see the respective Data Usability <br /> EPA=U.S.Environmental Protection Agency Summary section of the reports for detailed information on the qualifiers used. <br /> ESL=Environmental Screening Level 1. PAHs were analyzed by Lancaster Laboratories,Inc.using EPA Method 8270C SIM. <br /> ID=Identification 2. WQO(Tastes and Odors)that prohibits adverse tastes and odors or nuisance conditions. <br /> J=Indicates the reported value is an estimated concentration detected between the MDL and LOQ 3. WQO(Toxicity)that prohibits toxic chemicals in toxic amounts. <br /> LOQ=Limit of qualification 4. ESL for groundwater protection(drinking water source),based on"Ceiling Level(Nuisance/Aesthetic Concerns)." <br /> MCL=Maximum contaminant level 5. ESL in groundwater for the protection of ecological receptors. <br /> MDL=Method detection limit 6. ESL in surface water for protection of human health. <br /> MW=Monitoring well 7. ESL in surface water for protection of ecological receptors. <br /> ND=Not detected at or above the laboratory reporting limit 8. ESL in groundwater for human health protection,based on direct contact exposue pathways and the California Primary MCL. <br /> NS=Not sampled 9. Not sampled due to the presence of SPO. <br /> PAHs=Polynuclear aromatic hydrocarbons 10. Insufficient water volume in the well to sample. <br /> RWQCB=Regional Water Quality Control Board 11. PAH results are reported for the sample collected on March 30,2006. <br /> SIM=Selective ion monitoring 12. Well was not accessible. <br /> SPO=Separate-phase oil 13. The duplicate sample was labeled differently on the chain-of-custody form. <br /> gg/L=Micrograms per liter 14. Well located on Western Farm Service Property. <br /> WFSMW=Western Farm Service monitoring well Sources: <br /> WQO=Water Quality Objective ESLs from Screening for Environmental Concerns at Sites with Contaminated Soil and Groundwater (Interim Final),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.(revised August 2006). <br /> Page 3 of 3 From Science to Solullons <br />