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ameO <br /> TABLE A-4 <br /> SUMMARY GROUNDWATER SAMPLE ANALYTICAL RESULTS — SVOCs AND PAHs ' <br /> TRACY RAIL YARD SOUTHERN BOUNDARY <br /> Tracy Rail Yard Off Site South Area <br /> Tracy, California <br /> Notes <br /> 1 . Analytical results for the 2005 and 2008 samples were compiled from tables presented in previous consultants' reports . AMEC Geomatrix, Inc. did not independently review laboratory data sheets . Samples collected by AMEC Geomatrix, Inc. , in 2009 and 2010 were analyzed by Lancaster <br /> Laboratories , Inc. , of Lancaster, Pensylvannia , for PAHs using U . S . Environmental Protection Agency Method 8270 with selective ion monitoring (SIM) . Detected analytes are shown in bold face-type . <br /> 2 . BaP TEQs were calculated for each sample that had at least one carcinogenic PAH detection above the laboratory reporting limit. All results for non-detected carcinogenic PAHs were set at half of the detection limit . The equivalent is calculated using toxicity equivalency factors , adjusting the <br /> toxicity of the carcinogenic PAHs to the TEQ of benzo(a ) pyrene . <br /> Abbreviations <br /> -- = not analyzed <br /> < = analyte was not detected at or above the laboratory reporting limit indicated <br /> BaP TEQ = benzo(a ) pyrene toxicity equivalent <br /> duplicate = duplicate sample results <br /> bgs = below ground surface <br /> J = target analyte was positively identified ; the associated numerical value is the approximate concentration of analyte in the sample <br /> ND = not detected <br /> PAHs = polynuclear aromatic hydrocarbons <br /> SVOCs = semi-volatile organic compounds <br /> AMEC Geomatrix, Inc. <br /> X:\16000s\161140\4000 REGULAT0RY\Sou1h1WP_071211 \4 Apnd A\Tbl A-3_GW_TPHBTEX_PAHs.x1sx Page 2 of 2 <br />