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TABLE Composite Soil Analytical Results Summary of Detected Compounds 24550 Hansen Road Tracy,California Project No.33113-013018.02 Sample Sample Sample TPH (mg/kg) OCPs(mg/kg) Metals(mg/kg) Identification Depth(feetDate Heptachlor alpha- gamma- TPH-d 4,4'-DDD 4,4'-DDE Chlordane Arsenic Chromium Lead Mercury bgs) Epoxide chlordane chlordane rmp 1.0'-1.5' 5/24/2013 NO ND 0.0083 0.0035 ND 0.0041 0.0045 4.4 27 9.3 0.023 1.0'-1.5' 5/24/2013 ND ND 0.014 ND 0.081 0.0076 0.0077 ND 26 8.7 0.029 1.0'-1.5' 5/24/2013 ND ND 0.015 0.002 0.052 0.0069 0.0064 4.0 27 8.5 0.019 4 1.0'-1.5' 5/24/2013 ND 0.0026 0.016 0.0033 0.044 0.0053 0.0058 4.7 27 8.5 0.032 E 1.0'-1.5' 5/24/2013 ND ND 0.0054 ND ND NO ND NO 23 7.6 0.017 F 1.0'-1.5' 5/24/2013 NO ND 0.0081 ND ND ND ND 4.0 23 7.6 0.019 G 1.0'-1.5' 5/24/2013 1.5 ND 0.0078 ND ND ND ND 4.2 23 7.6 0.018 H 1.0'-1.5' S/24I2013 2.1 ND 0.012 ND ND NO ND 4.5271 1.0'-1.5' 5/24/2013 4.6 ND 0.0036 ND ND0.0019 0.0011 4.4 27J 1.0'-1.5' 5/24/2013 1.3 ND ND ND ND ND NDK 1.0'-1.5' 5/24/2013 ND ND ND ND NDL 1.0'-1.5' 5/24/2013 ND ND ND ND ND ND ND 5.0 33 10 0.023 RWQCB ESL Residential 83 2.4 1.7 0.013 0.44 0.44 0.44 0.39 750 80 6.7 DTSC CHHSL Residential 2.3 1.6 0.13 0.43 0.430.07 100,000 60 18 Notes: Results reported in milligrams per kilogram(mg/kg) • All TPH-mo and TPH-g analyzed by EPA Method 8015B and 82608,respectively,were under the reporting limits(Practical Quantitation Limit) All BTEX/MTBE analyzed by EPA Method 8260B were under the reporting limits All other OCPs analyzed by EPA Method 8081A were under the reporting limits All other metals analyzed by EPA Methods 6010B/7471A were under the reporting limits,except for barium,which was detected at concentrations ranging from 250 to 320 mg/kg. These values are below the residential ESL of 750 mg/kg. ND=not detected above laboratory reporting limit(Practical Quantitation Limit) --=Not Analyzed,ESL and/or CHHSL Not Established RWQCB ESL=Regional Water Quality Control Board Environmental Screening Level for Residential land use(RWQCB,Table A,February 2013). DTSC CHHSL-Residential values from Table 1 of the California Human Health Screening Levels(CHHSLs)California Environmental Protection Agency, Use of CHHSLs in Evaluation of Contaminated Properties--January 2005(updated October 2010). TPH=total petroleum hydrocarbons(as diesel,TPH-d;motor cil,TPH-mo;gasoline,TPH-g) BTEX=benzene,toluene,ethylbenzene and total xylenes OCPs=Organochlorine Pesticides Bolded detections denote concentrations above ESL and/or CHHSL