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Table 4 <br /> Summary of Soil Vapor Analytical Results <br /> 24550 Hansen Road <br /> Tracy, California <br /> Project No. 33113-013018.02 <br /> Sample ID BV-10-SV BV-11-SV BV-12-SV BV-17-SV BV-18-SV BV-19-SV BV-20-SV <br /> Soil Vapor Soil Vapor <br /> Sample Depth (feet b9s) 5.0 5.0 5.0 5.0 5.0 5.0 5.0 CHHSL ESL <br /> Sample Date 5/24/2013 5/24/2013 5/24/2013 5/24/2013 5/24/2013 5/24/2013 5/24/2013 <br /> Acetone 60 24 29 57 20 35 26 16,000,000 <br /> Isopropanol ND 9.7 ND ND ND ND 12 <br /> 2-Butanone 43 30 46 63 52 52 58 — 2,600,000 <br /> mE Tetrahydrofuran 8.2 4.7 7.8 15 9.5 11 12 — _- <br /> rn Cyclohexane 72 39 ND 86 37 34 56 <br /> 0Trichloroethene ND ND ND ND ND ND 5.4 530 300 <br /> 00 Toluene 13 5.8 ND 47 7.9 ND 6.0 140,000 160,000 <br /> Ethylbenzene ND ND ND 10 ND ND ND 420 490 <br /> Xylenes 4.3 ND ND 68 5.3 ND 4 320,000 52,000 <br /> 1,2,4-Trimethylbenzene ND ND ND 8.5 ND ND ND <br /> Notes: <br /> Results collected at-5.0 feet below ground surface(bgs). • <br /> All other VOCs analyzed by EPA Method TO-15 were below detection limits <br /> VOCs=volatile organic compounds <br /> Samples reported in micrograms per cubic meter(pg/m'). <br /> 2-Butanone=methyl ethyl ketone(MEK) <br /> Isopropyl alcohol used as leak-check compound <br /> No=not detected above analytical laboratory reporting limit(Practical Quantitation Limit) <br /> --=Not Established <br /> ESL=Environmental Screening Level <br /> Soil Vapor CHHSL-residential values from Table 3 of the California Human Health Screening Levels(CHHSLs)for Indoor Air and Soil Gas,California Environmental Protection <br /> Agency,Use of CHHSLs in Evaluation of Contaminated Properties--January 2005(updated October 2010). <br /> Soil Vapor ESL-residential values from Table E of the California Regional Water Quality Control Board,San Francisco Bay Region,Screening for Environmental Concerns at <br /> Sites with Contaminated Soil and Groundwater,Interim Final-November 2007(revised May 2008,updated February 2013). <br />