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TABLE 7 <br /> SUMMARY OF PREDICTED AIR CONCENTRATIONS FOR ELEVATED SOIL VAPOR CONCENTRATIONS <br /> Maximum Detected <br /> Soil Gas Indoor Air SL, Indoor Air SL, 0.001AF 0.0005AF 0.03 AF <br /> Concentration Residential 1 Industrial/Commercial 1 Derived IA2 Derived IA3 Derived IA4 <br /> Constituent -------------------------------------------------------------------------µg/m 3-------------------------------------------------------------------------- <br /> Benzene 29.5 0.097 0.42 0.03 0.01 0.89 <br /> Naphthalene 13.3 0.083 °l 0.36 °l 0.01 0.01 0.40 <br /> Notes: <br /> Soil vapor VOCs concentrations analyzed via EPA Method TO-15. <br /> Bold indicates result above screening level criteria. <br /> IA=Predicted indoor air concentration <br /> AF=Attenuation factor <br /> 1 Unless otherwise specified,Screening Levels refer to HERO HHRA Note 3.Table 1. DTSC Recommended Screening Levels,April 2019. <br /> a/Refers to San Francisco Bay Regional Water Quality Control Board Environmental Screening Levels(ESL),January 2019. <br /> b/HERO HHRA Note 5,Issue Date August 23,2014. Health-based Indoor Air Screening Criteria for TCE. <br /> z Existing Commercial DTSC-Recommended Attenuation Factor(0.001) <br /> 3 Future Commercial/Industrial DTSC-Recommended AF(0.0005) <br /> 4 USE PA/DTSC-Recommended AF(0.03) <br /> 202107-8656 Phase II Report Tables <br /> 2546 Turnpike Road,Stockton,CA Page 10 of 10 <br />