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TABLE 4 <br /> SUMMARY OF GROUNDWATER ANALYTICAL RESULTS(PAHs) <br /> MOUNTAIN HOUSE DEVELOPMENT SITE#6 <br /> Mountain House,San Joaquin County,California <br /> Concentrations inµg/L <br /> Abbreviations: Notes: <br /> Cal/EPA=California Environmental Protection Agency 1. PAHs were analyzed by Lancaster Laboratories,Inc.,using EPA Method 8270C SIM or LVL 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 /> EPA=United States Environmental Protection Agency statistical limits. <br /> ESL=Environmental Screening Level 2. Results in bold exceed WQOs and/or ESLs. <br /> ggw=Grab groundwater 3. See Appendix E.1 for data usability summary. <br /> GC/MS=Gas chromatography/mass spectrometry 4. WQO-Taste and Odor(EPA National Recommended Ambient Water Quality Criteria). <br /> HP=Hydropunch sample 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 /> J=Estimated concentration detected between MDL and LOQ 8. WQO-Toxicity(EPA National Recommended Ambient Water Quality Criteria,Non-cancer health effects,source of drinking water. <br /> LOQ=Limit of Quantitation 9. WQO-California State Notification Level(formerly Action Level). <br /> LVI=Large-volume injection 10.ESL-Taste and Odor(Ceiling Value). <br /> MDL=Method Detection Limit 11.ESL-Aquatic Habitat Goal. <br /> NA=Not Analyzed 12.ESL-Toxicity(Drinking Water). <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> QC=Quality control Sources: <br /> RWQCB=Regional Water Quality Control Board 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 /> SIM=Selective ion monitoring WQOs may be stated in either numerical or narrative form. Narrative water quality objectives are interpreted by valuesfrom SWRCB A Compilation of Water Quality Goals-July 2008. <br /> SWRCB=State Water Resources Control Board ESLs from the San Francisco Bay RWQCB Screening for Environmental Concerns at Sites with Contaminated Soil and Groundwater <br /> W=Wellhead tap (Interim Final May 2008). <br /> WQO=Water Quality Objective <br /> <=Denotes analyte not detected at or above the laboratory reporting limit <br /> gg/L=Micrograms per liter <br /> --=Not available <br /> Page 2 of 2 From Somme to Splowns <br />