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TABLE 4 <br /> SUMMARY OF GROUNDWATER ANALYTICAL RESULTS(PAHs) <br /> US CAN-WELTY ROAD <br /> Vernalis,San Joaquin County,California <br /> Concentrations in pg/L <br /> v � <br /> v i C RQJ <br /> R <br /> a, i0 00 Q O� R p try Q Q CJ P <br /> 47w <br /> 2 ^� •� -� 1 ti +�- as r. r .p <br /> 4 Q bhp p q A A C 4 v <br /> Boring/ Collection Date <br /> Well ID 1 Method 1 Sampled Q f4 <br /> SCREENING WQO 20 4 --- 2,100 5 0.04 6 0.0029 6 0.04 6 --- 0.04 6 0.4 6 0.0038 7 130 8 280 5 0.04 6 --- 28 5 17 9 --- 210 5 <br /> LEVELS ESL 2010 3011 0.7311 0.02711 0.01411 0.02911 0.1011 0.02912 0.3511 0.004812 811 3.911 0.04811 --- 2.111 1712 4.611 211 <br /> SB-44 99W 7/20/2010 <0.010 <0.010 <0.010 <0.010 0.0032 E <0.010 E <0.010 <0.010 E <0.010 <0.0030 <0.010 <0.010 <0.010 <0.0038 E <0.0038 <0.050 E 0.012 E <0.010 <br /> SB-44 D 99W 7/20/2010 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 <0.0097 0.036 E <0.0097 <0.0097 <br /> SB-45 99W 7/22/2010 <0.010 <0.010 <0.010 0.013 0.0094 E 0.012 E 0.01 <0.010 E 0.019 <0.0030 0.047 <0.010 <0.010 0.0086 E 0.0095 <0.050 E 0.041 0.047 <br /> SB-46 99W 7/21/2010 <0.010 <0.010 <0.010 <0.010 0.0036 E <0.010 E <0.010 <0.010 E <0.010 <0.0030 0.022 <0.010 <0.010 0.0056 E 0.0091 <0.050 E 0.023 0.017 <br /> SB-47 ggw 7/21/2010 0.27 0.02 0.01 0.024 0.021E 0.022E 0.018 <0.010 E 0.033 0.0068 0.08 0.081 0.013 0.058 E 0.035 0.13E 0.14 0.12 <br /> Abbreviations: Notes: <br /> Cal/EPA=California Environmental Protection Agency 1. PAHs were analyzed by Lancaster Laboratories,Inc.,using EPA Method 8270C SIM or LVI. The QC limits for PAHs and <br /> D=Duplicate Sample surrogate standard recoveries by LVI GC/MS are advisory only until sufficient data points can be obtained to calculate <br /> E=Estimated value based on surrogate recovery levels statistical limits. <br /> EPA=United States Environmental Protection Agency 2. Results in bold exceed WQOs and/or ESLs. <br /> ESL=Environmental Screening Level 3. See Appendix F for data usability summary. <br /> ggw =Grab groundwater 4. WQO-Taste and Odor(EPA National Recommended Ambient Water Quality Criteria). <br /> GC/MS=Gas chromatography/mass spectrometry 5. WQO-Toxicity(EPA IRIS Reference Dose as a Drinking Water Level). <br /> ID=Identification 6. WQO-Toxicity(Cal/EPA Cancer Potency as a Drinking Water Level). <br /> IRIS=Integrated Risk Information System 7. WQO-Toxicity(EPA National Recommended Ambient Water Quality Criteria,one in a million cancer risk,source of drinking water. <br /> LVI=Large-volume injection 8. WQO-Toxicity(EPA National Recommended Ambient Water Quality Criteria,Non-cancer health effects,source of drinking water. <br /> PAHs=Polynuclear aromatic hydrocarbons 9. WQO-California State Notification Level(formerly Action Level). <br /> QC=Quality control 10.ESL-Taste and Odor(Ceiling Value). <br /> RWQCB=Regional Water Quality Control Board 11.ESL-Aquatic Habitat Goal. <br /> SIM=Selective ion monitoring 12.ESL-Toxicity(Drinking Water). <br /> SWRCB=State Water Resources Control Board <br /> WQO=Water Quality Objective Sources: <br /> ---=Not available WQOs defined in the Central Valley RWQCB Water Quality Control Plan(Basin Plan)for the Sacramento River Basin and San Joaquin River Basin(Fourth Edition),October 2007. <br /> <=Denotes analyte not detected at or above the laboratory reporting limit WQOs may be stated in either numerical or narrative form. Narrative water quality objectives are interpreted by values <br /> gg/L=Micrograms per liter from SWRCB A Compilation of Water Quality Goals-July 2008. <br /> ESLs from the San Francisco Bay RWQCB Screening for Environmental Concerns at Sites with Contaminated Soil and Groundwater <br /> (Interim Final),May 2008. <br /> Arm 22 The Benham Companies,LEC <br /> __FJW%jam. A Wholly Owned Subsidiary <br /> Page 1 of 1 F+om science 10 sWffria+ <br />