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TABLE A <br />Summary of Analytical Results <br />Sample Date Depth (ft) <br />EPA Region IX RSLs Soli Gas Screening Level <br />VOCs <br />TPH-gasoline <br />tiglin' <br />Acetone <br />pg/rn' <br />3.2E+07 <br />dCL3ridne <br />Win' <br />7.3E+05 <br />Benzene <br />pg/rn' <br />3.6E+02 <br />I oluene <br />pg/rn' <br />5.2E+06 <br />T4-c. l'ul eh n' le <br />palm' <br />P e n4t at' o' nthel -M21-8 K ) <br />pg/rn' <br />3.1E+06 <br />'33 '"-"k"33' <br />pg/rn' <br />1.0E+05 <br />SW'''. <br />pg/rn' <br />1.0E+06 <br />H'3'' '' <br />pg/m' <br />7.3E+05 <br />2-31'3006ne <br />pg/rn' <br />3.1E+04 <br />2-Bit4.177- ) <br />plifm' <br />5.2E+06 <br />tientzheYni e trtmetillY21:enzene <br />µWm' P91.1' <br />1.1E+03 6.36.04 <br />trimethL5131:enzeine <br />pg/rn' <br />6.3E+04 <br />Teirehydrofuran <br />pg/rn' <br />2.1E+06 <br />Nepthe lene <br />pg/rn' <br />8.3E+01 <br />tert-Butenui <br />pg/rn' <br />L, CIIIVIR)101 <br />ptilm' <br />12E+02 <br />TeZiehein'en'e <br />pg/rn' <br />Brornomethane <br />pW.,' <br />1.1E+04 5.2+03 11E+04 <br />RWQCB ESLs Soli Gas' 1.5E+07 - 4.8E+01 1.6E+05 5.2E+04 4.7E+05 - - 5.6E+02 4.1E+01 6.1E+01 2.4E+02 3.0E+05 <br />DTSC Modified Screening Level' - - 9.7E+01 3.1E+05 - 9.4E+05 - 4.6E+02 <br />SG - 5 11/20/2018 76.0 ND 3.1 3.7 ND 6.3 ND ND ND 4.1 46 ND NiC) ND 180 ND 7.5 ND ND ND 210 <br />SG - 5 11/2012018 10 120.0 2.3 12 22 ND 15 13.2 ND 51 2.4 6.1 2.5 44 3.0 9.3 ND ND ND 596 <br />SG - 6 11/20/2018 5 400.0 ND ND 4.2 ND 14 3.3 ND ND 7.4 110 ND 4.4 NO 240 ND 13 ND ND ND 1040 <br />50-6 11/2012018 10 220.0 5.3 19 23 ND 17 14.6 2.1 40 5.9 81 3.2 9.1 2.9 51 ND ND ND ND 1,6 1650 <br />SG - 7 11/202018 5 moo 1/ 5.5 6.7 ND 7.9 ND ND ND 9.9 72 ND ND NO 140 ND 4.3 ND ND ND 542 <br />SG - 7 11/20t2015 10 Immo 12 33 38 ND 16 13.1 4.9 25 8.7 71 4.4 4.7 NO 22 ND ND ND ND ND 1040 <br />SD -S 11/202018 5 ND ND ND ND ND ND ND ND 3.8 ND ND ND ND NO 16 ND ND ND ND ND ND <br />SG - 8 11/20/2018 10 88.00 3.9 12 17 ND 3.8 5.8 ND 9.7 3.2 37 ND ND ND 67 ND 2.7 ND ND ND 256 <br />SG - 9 11/20/2018 5 14.00 ND ND ND ND ND ND NO 12 ND ND ND ND ND 5.2 ND ND ND ND ND ND <br />SG - 91. 11/20/2018 10 ND ND ND ND ND ND ND ND ND ND ND ND ND NO ND ND ND ND ND ND ND <br />SG-5 1/10/2019 10 170.0 20 48 330 4.0 5.8 111.0 ND 57 3.2 ND 23 16 5.1 ND ND 9.4 2.8 5.2 ND 4460 <br />SO-11 1/10/2019 10 21.0 ND 1.8 10 ND ND 2.9 ND 33 ND ND ND ND ND ND ND ND ND ND ND 282 <br />0/3-12 1/10/2019 10 ND ND 45 220 3.4 ND 86.0 4.8 ND ND ND 18 13 4.6 ND ND ND ND 3.7 ND 2780 <br />Notes: <br />NA = not applicable <br />ND = not detected <br />means screening level not reported <br />'EPA Region IX Regional Screening Levels for indoor air (November 2017) with an attenuation factor 01 0,001 for future residential land use. <br />3 Regional Water Quality Control Board ESLs for Soil Gas, Residential (February 2016, Rev 3). <br />3 <br /> <br />DISC Modified Screening Levels in Ambient Air (January 2018, updated February 2018) 0/than attenuation factor of 0.001 for future residential land use <br />12066.002.000 <br />January 22, 2018